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-rw-r--r--drivers/power/supply/Kconfig26
-rw-r--r--drivers/power/supply/Makefile2
-rw-r--r--drivers/power/supply/axp20x_battery.c88
-rw-r--r--drivers/power/supply/axp20x_usb_power.c2
-rw-r--r--drivers/power/supply/bq24735-charger.c6
-rw-r--r--drivers/power/supply/bq27xxx_battery.c536
-rw-r--r--drivers/power/supply/bq27xxx_battery_i2c.c82
-rw-r--r--drivers/power/supply/cpcap-battery.c808
-rw-r--r--drivers/power/supply/cpcap-charger.c89
-rw-r--r--drivers/power/supply/ds2760_battery.c2
-rw-r--r--drivers/power/supply/ds2780_battery.c2
-rw-r--r--drivers/power/supply/ds2781_battery.c2
-rw-r--r--drivers/power/supply/ltc3651-charger.c210
-rw-r--r--drivers/power/supply/power_supply_core.c83
-rw-r--r--drivers/power/supply/power_supply_sysfs.c125
-rw-r--r--drivers/power/supply/sbs-battery.c29
-rw-r--r--drivers/power/supply/twl4030_charger.c97
17 files changed, 1997 insertions, 192 deletions
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 86f40bf37c34..969f5005669c 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -82,6 +82,14 @@ config BATTERY_ACT8945A
Say Y here to enable support for power supply provided by
Active-semi ActivePath ACT8945A charger.
+config BATTERY_CPCAP
+ tristate "Motorola CPCAP PMIC battery driver"
+ depends on MFD_CPCAP && IIO
+ default MFD_CPCAP
+ help
+ Say Y here to enable support for battery on Motorola
+ phones and tablets such as droid 4.
+
config BATTERY_DS2760
tristate "DS2760 battery driver (HP iPAQ & others)"
depends on W1 && W1_SLAVE_DS2760
@@ -190,6 +198,17 @@ config BATTERY_BQ27XXX_I2C
Say Y here to enable support for batteries with BQ27xxx chips
connected over an I2C bus.
+config BATTERY_BQ27XXX_DT_UPDATES_NVM
+ bool "BQ27xxx support for update of NVM/flash data memory"
+ depends on BATTERY_BQ27XXX_I2C
+ help
+ Say Y here to enable devicetree monitored-battery config to update
+ NVM/flash data memory. Only enable this option for devices with a
+ fuel gauge mounted on the circuit board, and a battery that cannot
+ easily be replaced with one of a different type. Not for
+ general-purpose kernels, as this can cause misconfiguration of a
+ smart battery with embedded NVM/flash.
+
config BATTERY_DA9030
tristate "DA9030 battery driver"
depends on PMIC_DA903X
@@ -408,6 +427,13 @@ config CHARGER_MANAGER
runtime and in suspend-to-RAM by waking up the system periodically
with help of suspend_again support.
+config CHARGER_LTC3651
+ tristate "LTC3651 charger"
+ depends on GPIOLIB
+ help
+ Say Y to include support for the LTC3651 battery charger which reports
+ its status via GPIO lines.
+
config CHARGER_MAX14577
tristate "Maxim MAX14577/77836 battery charger driver"
depends on MFD_MAX14577
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index a39126d7a6ce..a41f40957847 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o
obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o
obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o
obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o
+obj-$(CONFIG_BATTERY_CPCAP) += cpcap-battery.o
obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
@@ -61,6 +62,7 @@ obj-$(CONFIG_CHARGER_LP8727) += lp8727_charger.o
obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
+obj-$(CONFIG_CHARGER_LTC3651) += ltc3651-charger.o
obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
obj-$(CONFIG_CHARGER_DETECTOR_MAX14656) += max14656_charger_detector.o
obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
index 5d29b2eab8fc..7494f0f0eadb 100644
--- a/drivers/power/supply/axp20x_battery.c
+++ b/drivers/power/supply/axp20x_battery.c
@@ -60,6 +60,8 @@ struct axp20x_batt_ps {
struct iio_channel *batt_chrg_i;
struct iio_channel *batt_dischrg_i;
struct iio_channel *batt_v;
+ /* Maximum constant charge current */
+ unsigned int max_ccc;
u8 axp_id;
};
@@ -129,6 +131,14 @@ static void raw_to_constant_charge_current(struct axp20x_batt_ps *axp, int *val)
*val = *val * 150000 + 300000;
}
+static void constant_charge_current_to_raw(struct axp20x_batt_ps *axp, int *val)
+{
+ if (axp->axp_id == AXP209_ID)
+ *val = (*val - 300000) / 100000;
+ else
+ *val = (*val - 300000) / 150000;
+}
+
static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
int *val)
{
@@ -221,9 +231,7 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
- val->intval = AXP20X_CHRG_CTRL1_TGT_CURR;
- raw_to_constant_charge_current(axp20x_batt, &val->intval);
-
+ val->intval = axp20x_batt->max_ccc;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
@@ -340,10 +348,10 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
int charge_current)
{
- if (axp_batt->axp_id == AXP209_ID)
- charge_current = (charge_current - 300000) / 100000;
- else
- charge_current = (charge_current - 300000) / 150000;
+ if (charge_current > axp_batt->max_ccc)
+ return -EINVAL;
+
+ constant_charge_current_to_raw(axp_batt, &charge_current);
if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
return -EINVAL;
@@ -352,6 +360,36 @@ static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
AXP20X_CHRG_CTRL1_TGT_CURR, charge_current);
}
+static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
+ int charge_current)
+{
+ bool lower_max = false;
+
+ constant_charge_current_to_raw(axp, &charge_current);
+
+ if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
+ return -EINVAL;
+
+ raw_to_constant_charge_current(axp, &charge_current);
+
+ if (charge_current > axp->max_ccc)
+ dev_warn(axp->dev,
+ "Setting max constant charge current higher than previously defined. Note that increasing the constant charge current may damage your battery.\n");
+ else
+ lower_max = true;
+
+ axp->max_ccc = charge_current;
+
+ if (lower_max) {
+ int current_cc;
+
+ axp20x_get_constant_charge_current(axp, &current_cc);
+ if (current_cc > charge_current)
+ axp20x_set_constant_charge_current(axp, charge_current);
+ }
+
+ return 0;
+}
static int axp20x_set_voltage_min_design(struct axp20x_batt_ps *axp_batt,
int min_voltage)
{
@@ -380,6 +418,9 @@ static int axp20x_battery_set_prop(struct power_supply *psy,
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return axp20x_set_constant_charge_current(axp20x_batt,
val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return axp20x_set_max_constant_charge_current(axp20x_batt,
+ val->intval);
default:
return -EINVAL;
@@ -405,7 +446,8 @@ static int axp20x_battery_prop_writeable(struct power_supply *psy,
{
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN ||
- psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT;
+ psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT ||
+ psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX;
}
static const struct power_supply_desc axp20x_batt_ps_desc = {
@@ -433,6 +475,7 @@ static int axp20x_power_probe(struct platform_device *pdev)
{
struct axp20x_batt_ps *axp20x_batt;
struct power_supply_config psy_cfg = {};
+ struct power_supply_battery_info info;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
@@ -484,6 +527,35 @@ static int axp20x_power_probe(struct platform_device *pdev)
return PTR_ERR(axp20x_batt->batt);
}
+ if (!power_supply_get_battery_info(axp20x_batt->batt, &info)) {
+ int vmin = info.voltage_min_design_uv;
+ int ccc = info.constant_charge_current_max_ua;
+
+ if (vmin > 0 && axp20x_set_voltage_min_design(axp20x_batt,
+ vmin))
+ dev_err(&pdev->dev,
+ "couldn't set voltage_min_design\n");
+
+ /* Set max to unverified value to be able to set CCC */
+ axp20x_batt->max_ccc = ccc;
+
+ if (ccc <= 0 || axp20x_set_constant_charge_current(axp20x_batt,
+ ccc)) {
+ dev_err(&pdev->dev,
+ "couldn't set constant charge current from DT: fallback to minimum value\n");
+ ccc = 300000;
+ axp20x_batt->max_ccc = ccc;
+ axp20x_set_constant_charge_current(axp20x_batt, ccc);
+ }
+ }
+
+ /*
+ * Update max CCC to a valid value if battery info is present or set it
+ * to current register value by default.
+ */
+ axp20x_get_constant_charge_current(axp20x_batt,
+ &axp20x_batt->max_ccc);
+
return 0;
}
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
index 2397c482656e..44f70dcea61e 100644
--- a/drivers/power/supply/axp20x_usb_power.c
+++ b/drivers/power/supply/axp20x_usb_power.c
@@ -339,7 +339,7 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
"VBUS_REMOVAL", "VBUS_VALID", "VBUS_NOT_VALID", NULL };
static const char * const axp22x_irq_names[] = {
"VBUS_PLUGIN", "VBUS_REMOVAL", NULL };
- static const char * const *irq_names;
+ const char * const *irq_names;
const struct power_supply_desc *usb_power_desc;
int i, irq, ret;
diff --git a/drivers/power/supply/bq24735-charger.c b/drivers/power/supply/bq24735-charger.c
index eb0145380def..6931e1d826f5 100644
--- a/drivers/power/supply/bq24735-charger.c
+++ b/drivers/power/supply/bq24735-charger.c
@@ -81,14 +81,12 @@ static int bq24735_charger_property_is_writeable(struct power_supply *psy,
static inline int bq24735_write_word(struct i2c_client *client, u8 reg,
u16 value)
{
- return i2c_smbus_write_word_data(client, reg, le16_to_cpu(value));
+ return i2c_smbus_write_word_data(client, reg, value);
}
static inline int bq24735_read_word(struct i2c_client *client, u8 reg)
{
- s32 ret = i2c_smbus_read_word_data(client, reg);
-
- return ret < 0 ? ret : le16_to_cpu(ret);
+ return i2c_smbus_read_word_data(client, reg);
}
static int bq24735_update_word(struct i2c_client *client, u8 reg,
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 398801a21b86..ed44439d0112 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -5,6 +5,7 @@
* Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
* Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
* Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
+ * Copyright (C) 2017 Liam Breck <kernel@networkimprov.net>
*
* Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
*
@@ -65,6 +66,7 @@
#define BQ27XXX_FLAG_DSC BIT(0)
#define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
#define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
+#define BQ27XXX_FLAG_CFGUP BIT(4)
#define BQ27XXX_FLAG_FC BIT(9)
#define BQ27XXX_FLAG_OTD BIT(14)
#define BQ27XXX_FLAG_OTC BIT(15)
@@ -78,6 +80,12 @@
#define BQ27000_FLAG_FC BIT(5)
#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
+/* control register params */
+#define BQ27XXX_SEALED 0x20
+#define BQ27XXX_SET_CFGUPDATE 0x13
+#define BQ27XXX_SOFT_RESET 0x42
+#define BQ27XXX_RESET 0x41
+
#define BQ27XXX_RS (20) /* Resistor sense mOhm */
#define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
#define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
@@ -108,9 +116,21 @@ enum bq27xxx_reg_index {
BQ27XXX_REG_SOC, /* State-of-Charge */
BQ27XXX_REG_DCAP, /* Design Capacity */
BQ27XXX_REG_AP, /* Average Power */
+ BQ27XXX_DM_CTRL, /* Block Data Control */
+ BQ27XXX_DM_CLASS, /* Data Class */
+ BQ27XXX_DM_BLOCK, /* Data Block */
+ BQ27XXX_DM_DATA, /* Block Data */
+ BQ27XXX_DM_CKSUM, /* Block Data Checksum */
BQ27XXX_REG_MAX, /* sentinel */
};
+#define BQ27XXX_DM_REG_ROWS \
+ [BQ27XXX_DM_CTRL] = 0x61, \
+ [BQ27XXX_DM_CLASS] = 0x3e, \
+ [BQ27XXX_DM_BLOCK] = 0x3f, \
+ [BQ27XXX_DM_DATA] = 0x40, \
+ [BQ27XXX_DM_CKSUM] = 0x60
+
/* Register mappings */
static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27000] = {
@@ -131,6 +151,11 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = 0x24,
+ [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
[BQ27010] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -150,6 +175,11 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
+ [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
[BQ2750X] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -169,6 +199,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ2751X] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -188,6 +219,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = 0x2e,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27500] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -207,6 +239,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27510G1] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -226,6 +259,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27510G2] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -245,6 +279,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27510G3] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -264,6 +299,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = 0x2e,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27520G1] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -283,6 +319,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27520G2] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -302,6 +339,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27520G3] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -321,6 +359,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27520G4] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -340,6 +379,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27530] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -359,6 +399,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27541] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -378,6 +419,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27545] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -397,6 +439,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
+ BQ27XXX_DM_REG_ROWS,
},
[BQ27421] = {
[BQ27XXX_REG_CTRL] = 0x00,
@@ -416,6 +459,7 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_SOC] = 0x1c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x18,
+ BQ27XXX_DM_REG_ROWS,
},
};
@@ -757,6 +801,73 @@ static struct {
static DEFINE_MUTEX(bq27xxx_list_lock);
static LIST_HEAD(bq27xxx_battery_devices);
+#define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
+
+#define BQ27XXX_DM_SZ 32
+
+struct bq27xxx_dm_reg {
+ u8 subclass_id;
+ u8 offset;
+ u8 bytes;
+ u16 min, max;
+};
+
+/**
+ * struct bq27xxx_dm_buf - chip data memory buffer
+ * @class: data memory subclass_id
+ * @block: data memory block number
+ * @data: data from/for the block
+ * @has_data: true if data has been filled by read
+ * @dirty: true if data has changed since last read/write
+ *
+ * Encapsulates info required to manage chip data memory blocks.
+ */
+struct bq27xxx_dm_buf {
+ u8 class;
+ u8 block;
+ u8 data[BQ27XXX_DM_SZ];
+ bool has_data, dirty;
+};
+
+#define BQ27XXX_DM_BUF(di, i) { \
+ .class = (di)->dm_regs[i].subclass_id, \
+ .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
+}
+
+static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
+ struct bq27xxx_dm_reg *reg)
+{
+ if (buf->class == reg->subclass_id &&
+ buf->block == reg->offset / BQ27XXX_DM_SZ)
+ return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
+
+ return NULL;
+}
+
+enum bq27xxx_dm_reg_id {
+ BQ27XXX_DM_DESIGN_CAPACITY = 0,
+ BQ27XXX_DM_DESIGN_ENERGY,
+ BQ27XXX_DM_TERMINATE_VOLTAGE,
+};
+
+static const char * const bq27xxx_dm_reg_name[] = {
+ [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
+ [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
+ [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
+};
+
+
+static bool bq27xxx_dt_to_nvm = true;
+module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
+MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
+ "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
+ "Users must set this =0 when installing a different type of battery!\n"
+ "Default is =1."
+#ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
+ "\nSetting this affects future kernel updates, not the current configuration."
+#endif
+);
+
static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
{
struct bq27xxx_device_info *di;
@@ -794,11 +905,419 @@ MODULE_PARM_DESC(poll_interval,
static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
bool single)
{
- /* Reports EINVAL for invalid/missing registers */
+ int ret;
+
+ if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
+ return -EINVAL;
+
+ ret = di->bus.read(di, di->regs[reg_index], single);
+ if (ret < 0)
+ dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
+ di->regs[reg_index], reg_index);
+
+ return ret;
+}
+
+static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
+ u16 value, bool single)
+{
+ int ret;
+
+ if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
+ return -EINVAL;
+
+ if (!di->bus.write)
+ return -EPERM;
+
+ ret = di->bus.write(di, di->regs[reg_index], value, single);
+ if (ret < 0)
+ dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
+ di->regs[reg_index], reg_index);
+
+ return ret;
+}
+
+static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
+ u8 *data, int len)
+{
+ int ret;
+
+ if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
+ return -EINVAL;
+
+ if (!di->bus.read_bulk)
+ return -EPERM;
+
+ ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
+ if (ret < 0)
+ dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
+ di->regs[reg_index], reg_index);
+
+ return ret;
+}
+
+static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
+ u8 *data, int len)
+{
+ int ret;
+
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
- return di->bus.read(di, di->regs[reg_index], single);
+ if (!di->bus.write_bulk)
+ return -EPERM;
+
+ ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
+ if (ret < 0)
+ dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
+ di->regs[reg_index], reg_index);
+
+ return ret;
+}
+
+static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
+{
+ int ret;
+
+ ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
+ if (ret < 0) {
+ dev_err(di->dev, "bus error on seal: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
+{
+ int ret;
+
+ if (di->unseal_key == 0) {
+ dev_err(di->dev, "unseal failed due to missing key\n");
+ return -EINVAL;
+ }
+
+ ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ dev_err(di->dev, "bus error on unseal: %d\n", ret);
+ return ret;
+}
+
+static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
+{
+ u16 sum = 0;
+ int i;
+
+ for (i = 0; i < BQ27XXX_DM_SZ; i++)
+ sum += buf->data[i];
+ sum &= 0xff;
+
+ return 0xff - sum;
+}
+
+static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
+ struct bq27xxx_dm_buf *buf)
+{
+ int ret;
+
+ buf->has_data = false;
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
+ if (ret < 0)
+ goto out;
+
+ BQ27XXX_MSLEEP(1);
+
+ ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
+ if (ret < 0)
+ goto out;
+
+ if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ buf->has_data = true;
+ buf->dirty = false;
+
+ return 0;
+
+out:
+ dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
+ return ret;
+}
+
+static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
+ struct bq27xxx_dm_buf *buf,
+ enum bq27xxx_dm_reg_id reg_id,
+ unsigned int val)
+{
+ struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
+ const char *str = bq27xxx_dm_reg_name[reg_id];
+ u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
+
+ if (prev == NULL) {
+ dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
+ return;
+ }
+
+ if (reg->bytes != 2) {
+ dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
+ return;
+ }
+
+ if (!buf->has_data)
+ return;
+
+ if (be16_to_cpup(prev) == val) {
+ dev_info(di->dev, "%s has %u\n", str, val);
+ return;
+ }
+
+#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
+ if (!di->ram_chip && !bq27xxx_dt_to_nvm) {
+#else
+ if (!di->ram_chip) {
+#endif
+ /* devicetree and NVM differ; defer to NVM */
+ dev_warn(di->dev, "%s has %u; update to %u disallowed "
+#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
+ "by dt_monitored_battery_updates_nvm=0"
+#else
+ "for flash/NVM data memory"
+#endif
+ "\n", str, be16_to_cpup(prev), val);
+ return;
+ }
+
+ dev_info(di->dev, "update %s to %u\n", str, val);
+
+ *prev = cpu_to_be16(val);
+ buf->dirty = true;
+}
+
+static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
+{
+ const int limit = 100;
+ u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
+ int ret, try = limit;
+
+ ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
+ if (ret < 0)
+ return ret;
+
+ do {
+ BQ27XXX_MSLEEP(25);
+ ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
+ if (ret < 0)
+ return ret;
+ } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
+
+ if (!try) {
+ dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
+ return -EINVAL;
+ }
+
+ if (limit - try > 3)
+ dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
+
+ return 0;
+}
+
+static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
+{
+ int ret = bq27xxx_battery_cfgupdate_priv(di, true);
+ if (ret < 0 && ret != -EINVAL)
+ dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
+
+ return ret;
+}
+
+static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
+{
+ int ret = bq27xxx_battery_cfgupdate_priv(di, false);
+ if (ret < 0 && ret != -EINVAL)
+ dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
+
+ return ret;
+}
+
+static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
+ struct bq27xxx_dm_buf *buf)
+{
+ bool cfgup = di->chip == BQ27421; /* assume related chips need cfgupdate */
+ int ret;
+
+ if (!buf->dirty)
+ return 0;
+
+ if (cfgup) {
+ ret = bq27xxx_battery_set_cfgupdate(di);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
+ if (ret < 0)
+ goto out;
+
+ BQ27XXX_MSLEEP(1);
+
+ ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
+ if (ret < 0)
+ goto out;
+
+ ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
+ bq27xxx_battery_checksum_dm_block(buf), true);
+ if (ret < 0)
+ goto out;
+
+ /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
+ * corruption on the '425 chip (and perhaps others), which can damage
+ * the chip.
+ */
+
+ if (cfgup) {
+ BQ27XXX_MSLEEP(1);
+ ret = bq27xxx_battery_soft_reset(di);
+ if (ret < 0)
+ return ret;
+ } else {
+ BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
+ }
+
+ buf->dirty = false;
+
+ return 0;
+
+out:
+ if (cfgup)
+ bq27xxx_battery_soft_reset(di);
+
+ dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
+ return ret;
+}
+
+static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
+ struct power_supply_battery_info *info)
+{
+ struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
+ struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
+ bool updated;
+
+ if (bq27xxx_battery_unseal(di) < 0)
+ return;
+
+ if (info->charge_full_design_uah != -EINVAL &&
+ info->energy_full_design_uwh != -EINVAL) {
+ bq27xxx_battery_read_dm_block(di, &bd);
+ /* assume design energy & capacity are in same block */
+ bq27xxx_battery_update_dm_block(di, &bd,
+ BQ27XXX_DM_DESIGN_CAPACITY,
+ info->charge_full_design_uah / 1000);
+ bq27xxx_battery_update_dm_block(di, &bd,
+ BQ27XXX_DM_DESIGN_ENERGY,
+ info->energy_full_design_uwh / 1000);
+ }
+
+ if (info->voltage_min_design_uv != -EINVAL) {
+ bool same = bd.class == bt.class && bd.block == bt.block;
+ if (!same)
+ bq27xxx_battery_read_dm_block(di, &bt);
+ bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
+ BQ27XXX_DM_TERMINATE_VOLTAGE,
+ info->voltage_min_design_uv / 1000);
+ }
+
+ updated = bd.dirty || bt.dirty;
+
+ bq27xxx_battery_write_dm_block(di, &bd);
+ bq27xxx_battery_write_dm_block(di, &bt);
+
+ bq27xxx_battery_seal(di);
+
+ if (updated && di->chip != BQ27421) { /* not a cfgupdate chip, so reset */
+ bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
+ BQ27XXX_MSLEEP(300); /* reset time is not documented */
+ }
+ /* assume bq27xxx_battery_update() is called hereafter */
+}
+
+static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
+{
+ struct power_supply_battery_info info = {};
+ unsigned int min, max;
+
+ if (power_supply_get_battery_info(di->bat, &info) < 0)
+ return;
+
+ if (!di->dm_regs) {
+ dev_warn(di->dev, "data memory update not supported for chip\n");
+ return;
+ }
+
+ if (info.energy_full_design_uwh != info.charge_full_design_uah) {
+ if (info.energy_full_design_uwh == -EINVAL)
+ dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
+ else if (info.charge_full_design_uah == -EINVAL)
+ dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
+ }
+
+ /* assume min == 0 */
+ max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
+ if (info.energy_full_design_uwh > max * 1000) {
+ dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
+ info.energy_full_design_uwh);
+ info.energy_full_design_uwh = -EINVAL;
+ }
+
+ /* assume min == 0 */
+ max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
+ if (info.charge_full_design_uah > max * 1000) {
+ dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
+ info.charge_full_design_uah);
+ info.charge_full_design_uah = -EINVAL;
+ }
+
+ min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
+ max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
+ if ((info.voltage_min_design_uv < min * 1000 ||
+ info.voltage_min_design_uv > max * 1000) &&
+ info.voltage_min_design_uv != -EINVAL) {
+ dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
+ info.voltage_min_design_uv);
+ info.voltage_min_design_uv = -EINVAL;
+ }
+
+ if ((info.energy_full_design_uwh != -EINVAL &&
+ info.charge_full_design_uah != -EINVAL) ||
+ info.voltage_min_design_uv != -EINVAL)
+ bq27xxx_battery_set_config(di, &info);
}
/*
@@ -1318,6 +1837,13 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = bq27xxx_simple_value(di->charge_design_full, val);
break;
+ /*
+ * TODO: Implement these to make registers set from
+ * power_supply_battery_info visible in sysfs.
+ */
+ case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ return -EINVAL;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
ret = bq27xxx_simple_value(di->cache.cycle_count, val);
break;
@@ -1351,7 +1877,10 @@ static void bq27xxx_external_power_changed(struct power_supply *psy)
int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
{
struct power_supply_desc *psy_desc;
- struct power_supply_config psy_cfg = { .drv_data = di, };
+ struct power_supply_config psy_cfg = {
+ .of_node = di->dev->of_node,
+ .drv_data = di,
+ };
INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
mutex_init(&di->lock);
@@ -1376,6 +1905,7 @@ int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
+ bq27xxx_battery_settings(di);
bq27xxx_battery_update(di);
mutex_lock(&bq27xxx_list_lock);
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index c68fbc3fe50a..a5972214f074 100644
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -38,7 +38,7 @@ static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
{
struct i2c_client *client = to_i2c_client(di->dev);
struct i2c_msg msg[2];
- unsigned char data[2];
+ u8 data[2];
int ret;
if (!client->adapter)
@@ -68,6 +68,82 @@ static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
return ret;
}
+static int bq27xxx_battery_i2c_write(struct bq27xxx_device_info *di, u8 reg,
+ int value, bool single)
+{
+ struct i2c_client *client = to_i2c_client(di->dev);
+ struct i2c_msg msg;
+ u8 data[4];
+ int ret;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ data[0] = reg;
+ if (single) {
+ data[1] = (u8) value;
+ msg.len = 2;
+ } else {
+ put_unaligned_le16(value, &data[1]);
+ msg.len = 3;
+ }
+
+ msg.buf = data;
+ msg.addr = client->addr;
+ msg.flags = 0;
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ return ret;
+ if (ret != 1)
+ return -EINVAL;
+ return 0;
+}
+
+static int bq27xxx_battery_i2c_bulk_read(struct bq27xxx_device_info *di, u8 reg,
+ u8 *data, int len)
+{
+ struct i2c_client *client = to_i2c_client(di->dev);
+ int ret;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ ret = i2c_smbus_read_i2c_block_data(client, reg, len, data);
+ if (ret < 0)
+ return ret;
+ if (ret != len)
+ return -EINVAL;
+ return 0;
+}
+
+static int bq27xxx_battery_i2c_bulk_write(struct bq27xxx_device_info *di,
+ u8 reg, u8 *data, int len)
+{
+ struct i2c_client *client = to_i2c_client(di->dev);
+ struct i2c_msg msg;
+ u8 buf[33];
+ int ret;
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ buf[0] = reg;
+ memcpy(&buf[1], data, len);
+
+ msg.buf = buf;
+ msg.addr = client->addr;
+ msg.flags = 0;
+ msg.len = len + 1;
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ return ret;
+ if (ret != 1)
+ return -EINVAL;
+ return 0;
+}
+
static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -95,7 +171,11 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
di->dev = &client->dev;
di->chip = id->driver_data;
di->name = name;
+
di->bus.read = bq27xxx_battery_i2c_read;
+ di->bus.write = bq27xxx_battery_i2c_write;
+ di->bus.read_bulk = bq27xxx_battery_i2c_bulk_read;
+ di->bus.write_bulk = bq27xxx_battery_i2c_bulk_write;
ret = bq27xxx_battery_setup(di);
if (ret)
diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c
new file mode 100644
index 000000000000..ee71a2b37b12
--- /dev/null
+++ b/drivers/power/supply/cpcap-battery.c
@@ -0,0 +1,808 @@
+/*
+ * Battery driver for CPCAP PMIC
+ *
+ * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
+ *
+ * Some parts of the code based on earlie Motorola mapphone Linux kernel
+ * drivers:
+ *
+ * Copyright (C) 2009-2010 Motorola, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+#include <linux/iio/consumer.h>
+#include <linux/iio/types.h>
+#include <linux/mfd/motorola-cpcap.h>
+
+#include <asm/div64.h>
+
+/*
+ * Register bit defines for CPCAP_REG_BPEOL. Some of these seem to
+ * map to MC13783UG.pdf "Table 5-19. Register 13, Power Control 0"
+ * to enable BATTDETEN, LOBAT and EOL features. We currently use
+ * LOBAT interrupts instead of EOL.
+ */
+#define CPCAP_REG_BPEOL_BIT_EOL9 BIT(9) /* Set for EOL irq */
+#define CPCAP_REG_BPEOL_BIT_EOL8 BIT(8) /* Set for EOL irq */
+#define CPCAP_REG_BPEOL_BIT_UNKNOWN7 BIT(7)
+#define CPCAP_REG_BPEOL_BIT_UNKNOWN6 BIT(6)
+#define CPCAP_REG_BPEOL_BIT_UNKNOWN5 BIT(5)
+#define CPCAP_REG_BPEOL_BIT_EOL_MULTI BIT(4) /* Set for multiple EOL irqs */
+#define CPCAP_REG_BPEOL_BIT_UNKNOWN3 BIT(3)
+#define CPCAP_REG_BPEOL_BIT_UNKNOWN2 BIT(2)
+#define CPCAP_REG_BPEOL_BIT_BATTDETEN BIT(1) /* Enable battery detect */
+#define CPCAP_REG_BPEOL_BIT_EOLSEL BIT(0) /* BPDET = 0, EOL = 1 */
+
+#define CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS 250
+
+enum {
+ CPCAP_BATTERY_IIO_BATTDET,
+ CPCAP_BATTERY_IIO_VOLTAGE,
+ CPCAP_BATTERY_IIO_CHRG_CURRENT,
+ CPCAP_BATTERY_IIO_BATT_CURRENT,
+ CPCAP_BATTERY_IIO_NR,
+};
+
+enum cpcap_battery_irq_action {
+ CPCAP_BATTERY_IRQ_ACTION_NONE,
+ CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW,
+ CPCAP_BATTERY_IRQ_ACTION_POWEROFF,
+};
+
+struct cpcap_interrupt_desc {
+ const char *name;
+ struct list_head node;
+ int irq;
+ enum cpcap_battery_irq_action action;
+};
+
+struct cpcap_battery_config {
+ int ccm;
+ int cd_factor;
+ struct power_supply_info info;
+};
+
+struct cpcap_coulomb_counter_data {
+ s32 sample; /* 24-bits */
+ s32 accumulator;
+ s16 offset; /* 10-bits */
+};
+
+enum cpcap_battery_state {
+ CPCAP_BATTERY_STATE_PREVIOUS,
+ CPCAP_BATTERY_STATE_LATEST,
+ CPCAP_BATTERY_STATE_NR,
+};
+
+struct cpcap_battery_state_data {
+ int voltage;
+ int current_ua;
+ int counter_uah;
+ int temperature;
+ ktime_t time;
+ struct cpcap_coulomb_counter_data cc;
+};
+
+struct cpcap_battery_ddata {
+ struct device *dev;
+ struct regmap *reg;
+ struct list_head irq_list;
+ struct iio_channel *channels[CPCAP_BATTERY_IIO_NR];
+ struct power_supply *psy;
+ struct cpcap_battery_config config;
+ struct cpcap_battery_state_data state[CPCAP_BATTERY_STATE_NR];
+ atomic_t active;
+ int status;
+ u16 vendor;
+};
+
+#define CPCAP_NO_BATTERY -400
+
+static struct cpcap_battery_state_data *
+cpcap_battery_get_state(struct cpcap_battery_ddata *ddata,
+ enum cpcap_battery_state state)
+{
+ if (state >= CPCAP_BATTERY_STATE_NR)
+ return NULL;
+
+ return &ddata->state[state];
+}
+
+static struct cpcap_battery_state_data *
+cpcap_battery_latest(struct cpcap_battery_ddata *ddata)
+{
+ return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_LATEST);
+}
+
+static struct cpcap_battery_state_data *
+cpcap_battery_previous(struct cpcap_battery_ddata *ddata)
+{
+ return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_PREVIOUS);
+}
+
+static int cpcap_charger_battery_temperature(struct cpcap_battery_ddata *ddata,
+ int *value)
+{
+ struct iio_channel *channel;
+ int error;
+
+ channel = ddata->channels[CPCAP_BATTERY_IIO_BATTDET];
+ error = iio_read_channel_processed(channel, value);
+ if (error < 0) {
+ dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
+ *value = CPCAP_NO_BATTERY;
+
+ return error;
+ }
+
+ *value /= 100;
+
+ return 0;
+}
+
+static int cpcap_battery_get_voltage(struct cpcap_battery_ddata *ddata)
+{
+ struct iio_channel *channel;
+ int error, value = 0;
+
+ channel = ddata->channels[CPCAP_BATTERY_IIO_VOLTAGE];
+ error = iio_read_channel_processed(channel, &value);
+ if (error < 0) {
+ dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
+
+ return 0;
+ }
+
+ return value * 1000;
+}
+
+static int cpcap_battery_get_current(struct cpcap_battery_ddata *ddata)
+{
+ struct iio_channel *channel;
+ int error, value = 0;
+
+ channel = ddata->channels[CPCAP_BATTERY_IIO_BATT_CURRENT];
+ error = iio_read_channel_processed(channel, &value);
+ if (error < 0) {
+ dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
+
+ return 0;
+ }
+
+ return value * 1000;
+}
+
+/**
+ * cpcap_battery_cc_raw_div - calculate and divide coulomb counter μAms values
+ * @ddata: device driver data
+ * @sample: coulomb counter sample value
+ * @accumulator: coulomb counter integrator value
+ * @offset: coulomb counter offset value
+ * @divider: conversion divider
+ *
+ * Note that cc_lsb and cc_dur values are from Motorola Linux kernel
+ * function data_get_avg_curr_ua() and seem to be based on measured test
+ * results. It also has the following comment:
+ *
+ * Adjustment factors are applied here as a temp solution per the test
+ * results. Need to work out a formal solution for this adjustment.
+ *
+ * A coulomb counter for similar hardware seems to be documented in
+ * "TWL6030 Gas Gauging Basics (Rev. A)" swca095a.pdf in chapter
+ * "10 Calculating Accumulated Current". We however follow what the
+ * Motorola mapphone Linux kernel is doing as there may be either a
+ * TI or ST coulomb counter in the PMIC.
+ */
+static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
+ u32 sample, s32 accumulator,
+ s16 offset, u32 divider)
+{
+ s64 acc;
+ u64 tmp;
+ int avg_current;
+ u32 cc_lsb;
+
+ sample &= 0xffffff; /* 24-bits, unsigned */
+ offset &= 0x7ff; /* 10-bits, signed */
+
+ switch (ddata->vendor) {
+ case CPCAP_VENDOR_ST:
+ cc_lsb = 95374; /* μAms per LSB */
+ break;
+ case CPCAP_VENDOR_TI:
+ cc_lsb = 91501; /* μAms per LSB */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ acc = accumulator;
+ acc = acc - ((s64)sample * offset);
+ cc_lsb = (cc_lsb * ddata->config.cd_factor) / 1000;
+
+ if (acc >= 0)
+ tmp = acc;
+ else
+ tmp = acc * -1;
+
+ tmp = tmp * cc_lsb;
+ do_div(tmp, divider);
+ avg_current = tmp;
+
+ if (acc >= 0)
+ return -avg_current;
+ else
+ return avg_current;
+}
+
+/* 3600000μAms = 1μAh */
+static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata,
+ u32 sample, s32 accumulator,
+ s16 offset)
+{
+ return cpcap_battery_cc_raw_div(ddata, sample,
+ accumulator, offset,
+ 3600000);
+}
+
+static int cpcap_battery_cc_to_ua(struct cpcap_battery_ddata *ddata,
+ u32 sample, s32 accumulator,
+ s16 offset)
+{
+ return cpcap_battery_cc_raw_div(ddata, sample,
+ accumulator, offset,
+ sample *
+ CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS);
+}
+
+/**
+ * cpcap_battery_read_accumulated - reads cpcap coulomb counter
+ * @ddata: device driver data
+ * @regs: coulomb counter values
+ *
+ * Based on Motorola mapphone kernel function data_read_regs().
+ * Looking at the registers, the coulomb counter seems similar to
+ * the coulomb counter in TWL6030. See "TWL6030 Gas Gauging Basics
+ * (Rev. A) swca095a.pdf for "10 Calculating Accumulated Current".
+ *
+ * Note that swca095a.pdf instructs to stop the coulomb counter
+ * before reading to avoid values changing. Motorola mapphone
+ * Linux kernel does not do it, so let's assume they've verified
+ * the data produced is correct.
+ */
+static int
+cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata,
+ struct cpcap_coulomb_counter_data *ccd)
+{
+ u16 buf[7]; /* CPCAP_REG_CC1 to CCI */
+ int error;
+
+ ccd->sample = 0;
+ ccd->accumulator = 0;
+ ccd->offset = 0;
+
+ /* Read coulomb counter register range */
+ error = regmap_bulk_read(ddata->reg, CPCAP_REG_CCS1,
+ buf, ARRAY_SIZE(buf));
+ if (error)
+ return 0;
+
+ /* Sample value CPCAP_REG_CCS1 & 2 */
+ ccd->sample = (buf[1] & 0x0fff) << 16;
+ ccd->sample |= buf[0];
+
+ /* Accumulator value CPCAP_REG_CCA1 & 2 */
+ ccd->accumulator = ((s16)buf[3]) << 16;
+ ccd->accumulator |= buf[2];
+
+ /* Offset value CPCAP_REG_CCO */
+ ccd->offset = buf[5];
+
+ /* Adjust offset based on mode value CPCAP_REG_CCM? */
+ if (buf[4] >= 0x200)
+ ccd->offset |= 0xfc00;
+
+ return cpcap_battery_cc_to_uah(ddata,
+ ccd->sample,
+ ccd->accumulator,
+ ccd->offset);
+}
+
+/**
+ * cpcap_battery_cc_get_avg_current - read cpcap coulumb counter
+ * @ddata: cpcap battery driver device data
+ */
+static int cpcap_battery_cc_get_avg_current(struct cpcap_battery_ddata *ddata)
+{
+ int value, acc, error;
+ s32 sample = 1;
+ s16 offset;
+
+ if (ddata->vendor == CPCAP_VENDOR_ST)
+ sample = 4;
+
+ /* Coulomb counter integrator */
+ error = regmap_read(ddata->reg, CPCAP_REG_CCI, &value);
+ if (error)
+ return error;
+
+ if ((ddata->vendor == CPCAP_VENDOR_TI) && (value > 0x2000))
+ value = value | 0xc000;
+
+ acc = (s16)value;
+
+ /* Coulomb counter sample time */
+ error = regmap_read(ddata->reg, CPCAP_REG_CCM, &value);
+ if (error)
+ return error;
+
+ if (value < 0x200)
+ offset = value;
+ else
+ offset = value | 0xfc00;
+
+ return cpcap_battery_cc_to_ua(ddata, sample, acc, offset);
+}
+
+static bool cpcap_battery_full(struct cpcap_battery_ddata *ddata)
+{
+ struct cpcap_battery_state_data *state = cpcap_battery_latest(ddata);
+
+ /* Basically anything that measures above 4347000 is full */
+ if (state->voltage >= (ddata->config.info.voltage_max_design - 4000))
+ return true;
+
+ return false;
+}
+
+static int cpcap_battery_update_status(struct cpcap_battery_ddata *ddata)
+{
+ struct cpcap_battery_state_data state, *latest, *previous;
+ ktime_t now;
+ int error;
+
+ memset(&state, 0, sizeof(state));
+ now = ktime_get();
+
+ latest = cpcap_battery_latest(ddata);
+ if (latest) {
+ s64 delta_ms = ktime_to_ms(ktime_sub(now, latest->time));
+
+ if (delta_ms < CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS)
+ return delta_ms;
+ }
+
+ state.time = now;
+ state.voltage = cpcap_battery_get_voltage(ddata);
+ state.current_ua = cpcap_battery_get_current(ddata);
+ state.counter_uah = cpcap_battery_read_accumulated(ddata, &state.cc);
+
+ error = cpcap_charger_battery_temperature(ddata,
+ &state.temperature);
+ if (error)
+ return error;
+
+ previous = cpcap_battery_previous(ddata);
+ memcpy(previous, latest, sizeof(*previous));
+ memcpy(latest, &state, sizeof(*latest));
+
+ return 0;
+}
+
+static enum power_supply_property cpcap_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_POWER_NOW,
+ POWER_SUPPLY_PROP_POWER_AVG,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_SCOPE,
+ POWER_SUPPLY_PROP_TEMP,
+};
+
+static int cpcap_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct cpcap_battery_ddata *ddata = power_supply_get_drvdata(psy);
+ struct cpcap_battery_state_data *latest, *previous;
+ u32 sample;
+ s32 accumulator;
+ int cached;
+ s64 tmp;
+
+ cached = cpcap_battery_update_status(ddata);
+ if (cached < 0)
+ return cached;
+
+ latest = cpcap_battery_latest(ddata);
+ previous = cpcap_battery_previous(ddata);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ if (latest->temperature > CPCAP_NO_BATTERY)
+ val->intval = 1;
+ else
+ val->intval = 0;
+ break;
+ case POWER_SUPPLY_PROP_STATUS:
+ if (cpcap_battery_full(ddata)) {
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ break;
+ }
+ if (cpcap_battery_cc_get_avg_current(ddata) < 0)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = ddata->config.info.technology;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = cpcap_battery_get_voltage(ddata);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = ddata->config.info.voltage_max_design;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = ddata->config.info.voltage_min_design;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ if (cached) {
+ val->intval = cpcap_battery_cc_get_avg_current(ddata);
+ break;
+ }
+ sample = latest->cc.sample - previous->cc.sample;
+ accumulator = latest->cc.accumulator - previous->cc.accumulator;
+ val->intval = cpcap_battery_cc_to_ua(ddata, sample,
+ accumulator,
+ latest->cc.offset);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ val->intval = latest->current_ua;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ val->intval = latest->counter_uah;
+ break;
+ case POWER_SUPPLY_PROP_POWER_NOW:
+ tmp = (latest->voltage / 10000) * latest->current_ua;
+ val->intval = div64_s64(tmp, 100);
+ break;
+ case POWER_SUPPLY_PROP_POWER_AVG:
+ if (cached) {
+ tmp = cpcap_battery_cc_get_avg_current(ddata);
+ tmp *= (latest->voltage / 10000);
+ val->intval = div64_s64(tmp, 100);
+ break;
+ }
+ sample = latest->cc.sample - previous->cc.sample;
+ accumulator = latest->cc.accumulator - previous->cc.accumulator;
+ tmp = cpcap_battery_cc_to_ua(ddata, sample, accumulator,
+ latest->cc.offset);
+ tmp *= ((latest->voltage + previous->voltage) / 20000);
+ val->intval = div64_s64(tmp, 100);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ if (cpcap_battery_full(ddata))
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else if (latest->voltage >= 3750000)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
+ else if (latest->voltage >= 3300000)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ else if (latest->voltage > 3100000)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else if (latest->voltage <= 3100000)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ else
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = ddata->config.info.charge_full_design;
+ break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = latest->temperature;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static irqreturn_t cpcap_battery_irq_thread(int irq, void *data)
+{
+ struct cpcap_battery_ddata *ddata = data;
+ struct cpcap_battery_state_data *latest;
+ struct cpcap_interrupt_desc *d;
+
+ if (!atomic_read(&ddata->active))
+ return IRQ_NONE;
+
+ list_for_each_entry(d, &ddata->irq_list, node) {
+ if (irq == d->irq)
+ break;
+ }
+
+ if (!d)
+ return IRQ_NONE;
+
+ latest = cpcap_battery_latest(ddata);
+
+ switch (d->action) {
+ case CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW:
+ if (latest->counter_uah >= 0)
+ dev_warn(ddata->dev, "Battery low at 3.3V!\n");
+ break;
+ case CPCAP_BATTERY_IRQ_ACTION_POWEROFF:
+ if (latest->counter_uah >= 0) {
+ dev_emerg(ddata->dev,
+ "Battery empty at 3.1V, powering off\n");
+ orderly_poweroff(true);
+ }
+ break;
+ default:
+ break;
+ }
+
+ power_supply_changed(ddata->psy);
+
+ return IRQ_HANDLED;
+}
+
+static int cpcap_battery_init_irq(struct platform_device *pdev,
+ struct cpcap_battery_ddata *ddata,
+ const char *name)
+{
+ struct cpcap_interrupt_desc *d;
+ int irq, error;
+
+ irq = platform_get_irq_byname(pdev, name);
+ if (!irq)
+ return -ENODEV;
+
+ error = devm_request_threaded_irq(ddata->dev, irq, NULL,
+ cpcap_battery_irq_thread,
+ IRQF_SHARED,
+ name, ddata);
+ if (error) {
+ dev_err(ddata->dev, "could not get irq %s: %i\n",
+ name, error);
+
+ return error;
+ }
+
+ d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
+ if (!d)
+ return -ENOMEM;
+
+ d->name = name;
+ d->irq = irq;
+
+ if (!strncmp(name, "lowbph", 6))
+ d->action = CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW;
+ else if (!strncmp(name, "lowbpl", 6))
+ d->action = CPCAP_BATTERY_IRQ_ACTION_POWEROFF;
+
+ list_add(&d->node, &ddata->irq_list);
+
+ return 0;
+}
+
+static int cpcap_battery_init_interrupts(struct platform_device *pdev,
+ struct cpcap_battery_ddata *ddata)
+{
+ const char * const cpcap_battery_irqs[] = {
+ "eol", "lowbph", "lowbpl",
+ "chrgcurr1", "battdetb"
+ };
+ int i, error;
+
+ for (i = 0; i < ARRAY_SIZE(cpcap_battery_irqs); i++) {
+ error = cpcap_battery_init_irq(pdev, ddata,
+ cpcap_battery_irqs[i]);
+ if (error)
+ return error;
+ }
+
+ /* Enable low battery interrupts for 3.3V high and 3.1V low */
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_BPEOL,
+ 0xffff,
+ CPCAP_REG_BPEOL_BIT_BATTDETEN);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static int cpcap_battery_init_iio(struct cpcap_battery_ddata *ddata)
+{
+ const char * const names[CPCAP_BATTERY_IIO_NR] = {
+ "battdetb", "battp", "chg_isense", "batti",
+ };
+ int error, i;
+
+ for (i = 0; i < CPCAP_BATTERY_IIO_NR; i++) {
+ ddata->channels[i] = devm_iio_channel_get(ddata->dev,
+ names[i]);
+ if (IS_ERR(ddata->channels[i])) {
+ error = PTR_ERR(ddata->channels[i]);
+ goto out_err;
+ }
+
+ if (!ddata->channels[i]->indio_dev) {
+ error = -ENXIO;
+ goto out_err;
+ }
+ }
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+ error);
+
+ return error;
+}
+
+/*
+ * Based on the values from Motorola mapphone Linux kernel. In the
+ * the Motorola mapphone Linux kernel tree the value for pm_cd_factor
+ * is passed to the kernel via device tree. If it turns out to be
+ * something device specific we can consider that too later.
+ *
+ * And looking at the battery full and shutdown values for the stock
+ * kernel on droid 4, full is 4351000 and software initiates shutdown
+ * at 3078000. The device will die around 2743000.
+ */
+static const struct cpcap_battery_config cpcap_battery_default_data = {
+ .ccm = 0x3ff,
+ .cd_factor = 0x3cc,
+ .info.technology = POWER_SUPPLY_TECHNOLOGY_LION,
+ .info.voltage_max_design = 4351000,
+ .info.voltage_min_design = 3100000,
+ .info.charge_full_design = 1740000,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id cpcap_battery_id_table[] = {
+ {
+ .compatible = "motorola,cpcap-battery",
+ .data = &cpcap_battery_default_data,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cpcap_battery_id_table);
+#endif
+
+static int cpcap_battery_probe(struct platform_device *pdev)
+{
+ struct power_supply_desc *psy_desc;
+ struct cpcap_battery_ddata *ddata;
+ const struct of_device_id *match;
+ struct power_supply_config psy_cfg = {};
+ int error;
+
+ match = of_match_device(of_match_ptr(cpcap_battery_id_table),
+ &pdev->dev);
+ if (!match)
+ return -EINVAL;
+
+ if (!match->data) {
+ dev_err(&pdev->dev, "no configuration data found\n");
+
+ return -ENODEV;
+ }
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&ddata->irq_list);
+ ddata->dev = &pdev->dev;
+ memcpy(&ddata->config, match->data, sizeof(ddata->config));
+
+ ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
+ if (!ddata->reg)
+ return -ENODEV;
+
+ error = cpcap_get_vendor(ddata->dev, ddata->reg, &ddata->vendor);
+ if (error)
+ return error;
+
+ platform_set_drvdata(pdev, ddata);
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_CCM,
+ 0xffff, ddata->config.ccm);
+ if (error)
+ return error;
+
+ error = cpcap_battery_init_interrupts(pdev, ddata);
+ if (error)
+ return error;
+
+ error = cpcap_battery_init_iio(ddata);
+ if (error)
+ return error;
+
+ psy_desc = devm_kzalloc(ddata->dev, sizeof(*psy_desc), GFP_KERNEL);
+ if (!psy_desc)
+ return -ENOMEM;
+
+ psy_desc->name = "battery",
+ psy_desc->type = POWER_SUPPLY_TYPE_BATTERY,
+ psy_desc->properties = cpcap_battery_props,
+ psy_desc->num_properties = ARRAY_SIZE(cpcap_battery_props),
+ psy_desc->get_property = cpcap_battery_get_property,
+
+ psy_cfg.of_node = pdev->dev.of_node;
+ psy_cfg.drv_data = ddata;
+
+ ddata->psy = devm_power_supply_register(ddata->dev, psy_desc,
+ &psy_cfg);
+ error = PTR_ERR_OR_ZERO(ddata->psy);
+ if (error) {
+ dev_err(ddata->dev, "failed to register power supply\n");
+ return error;
+ }
+
+ atomic_set(&ddata->active, 1);
+
+ return 0;
+}
+
+static int cpcap_battery_remove(struct platform_device *pdev)
+{
+ struct cpcap_battery_ddata *ddata = platform_get_drvdata(pdev);
+ int error;
+
+ atomic_set(&ddata->active, 0);
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_BPEOL,
+ 0xffff, 0);
+ if (error)
+ dev_err(&pdev->dev, "could not disable: %i\n", error);
+
+ return 0;
+}
+
+static struct platform_driver cpcap_battery_driver = {
+ .driver = {
+ .name = "cpcap_battery",
+ .of_match_table = of_match_ptr(cpcap_battery_id_table),
+ },
+ .probe = cpcap_battery_probe,
+ .remove = cpcap_battery_remove,
+};
+module_platform_driver(cpcap_battery_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
+MODULE_DESCRIPTION("CPCAP PMIC Battery Driver");
diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c
index 26a2dc7ac9a2..11a07633de6c 100644
--- a/drivers/power/supply/cpcap-charger.c
+++ b/drivers/power/supply/cpcap-charger.c
@@ -38,20 +38,27 @@
#include <linux/iio/consumer.h>
#include <linux/mfd/motorola-cpcap.h>
-/* CPCAP_REG_CRM register bits */
+/*
+ * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
+ * see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
+ * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
+ * and values for CPCAP are different, but some of the internal components seem
+ * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
+ * bits that seem to describe the CRM register.
+ */
#define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
#define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
-#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13)
-#define CPCAP_REG_CRM_RVRSMODE BIT(12)
-#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11)
+#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */
+#define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */
+#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */
#define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
-#define CPCAP_REG_CRM_FET_OVRD BIT(9)
-#define CPCAP_REG_CRM_FET_CTRL BIT(8)
-#define CPCAP_REG_CRM_VCHRG3 BIT(7)
+#define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */
+#define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */
+#define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */
#define CPCAP_REG_CRM_VCHRG2 BIT(6)
#define CPCAP_REG_CRM_VCHRG1 BIT(5)
#define CPCAP_REG_CRM_VCHRG0 BIT(4)
-#define CPCAP_REG_CRM_ICHRG3 BIT(3)
+#define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */
#define CPCAP_REG_CRM_ICHRG2 BIT(2)
#define CPCAP_REG_CRM_ICHRG1 BIT(1)
#define CPCAP_REG_CRM_ICHRG0 BIT(0)
@@ -63,42 +70,50 @@
#define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
#define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
-/* CPCAP_REG_CRM charge voltages */
+/*
+ * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
+ * Note that these register bits don't match MC13783UG.pdf VCHRG
+ * register bits.
+ */
#define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
#define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
#define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
-#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x2)
-#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x3)
-#define CPCAP_REG_CRM_VCHRG_4V22 CPCAP_REG_CRM_VCHRG(0x4)
-#define CPCAP_REG_CRM_VCHRG_4V24 CPCAP_REG_CRM_VCHRG(0x5)
-#define CPCAP_REG_CRM_VCHRG_4V26 CPCAP_REG_CRM_VCHRG(0x6)
-#define CPCAP_REG_CRM_VCHRG_4V28 CPCAP_REG_CRM_VCHRG(0x7)
-#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x8)
-#define CPCAP_REG_CRM_VCHRG_4V32 CPCAP_REG_CRM_VCHRG(0x9)
-#define CPCAP_REG_CRM_VCHRG_4V34 CPCAP_REG_CRM_VCHRG(0xa)
+#define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
+#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
+#define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
+#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
+#define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
+#define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
+#define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
+#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
+#define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
#define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
#define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
#define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
#define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
#define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
-/* CPCAP_REG_CRM charge currents */
+/*
+ * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
+ * values in "Table 8-3. Charge Path Regulator Current Limit
+ * Characteristics" for the nominal values.
+ */
#define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
#define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
#define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
-#define CPCAP_REG_CRM_ICHRG_0A176 CPCAP_REG_CRM_ICHRG(0x2)
-#define CPCAP_REG_CRM_ICHRG_0A264 CPCAP_REG_CRM_ICHRG(0x3)
-#define CPCAP_REG_CRM_ICHRG_0A352 CPCAP_REG_CRM_ICHRG(0x4)
-#define CPCAP_REG_CRM_ICHRG_0A440 CPCAP_REG_CRM_ICHRG(0x5)
-#define CPCAP_REG_CRM_ICHRG_0A528 CPCAP_REG_CRM_ICHRG(0x6)
-#define CPCAP_REG_CRM_ICHRG_0A616 CPCAP_REG_CRM_ICHRG(0x7)
-#define CPCAP_REG_CRM_ICHRG_0A704 CPCAP_REG_CRM_ICHRG(0x8)
-#define CPCAP_REG_CRM_ICHRG_0A792 CPCAP_REG_CRM_ICHRG(0x9)
-#define CPCAP_REG_CRM_ICHRG_0A880 CPCAP_REG_CRM_ICHRG(0xa)
-#define CPCAP_REG_CRM_ICHRG_0A968 CPCAP_REG_CRM_ICHRG(0xb)
-#define CPCAP_REG_CRM_ICHRG_1A056 CPCAP_REG_CRM_ICHRG(0xc)
-#define CPCAP_REG_CRM_ICHRG_1A144 CPCAP_REG_CRM_ICHRG(0xd)
-#define CPCAP_REG_CRM_ICHRG_1A584 CPCAP_REG_CRM_ICHRG(0xe)
+#define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
+#define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
+#define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
+#define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
+#define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
+#define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
+#define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
+#define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
+#define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
+#define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
+#define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
+#define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
+#define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
enum {
@@ -428,9 +443,9 @@ static void cpcap_usb_detect(struct work_struct *work)
int max_current;
if (cpcap_charger_battery_found(ddata))
- max_current = CPCAP_REG_CRM_ICHRG_1A584;
+ max_current = CPCAP_REG_CRM_ICHRG_1A596;
else
- max_current = CPCAP_REG_CRM_ICHRG_0A528;
+ max_current = CPCAP_REG_CRM_ICHRG_0A532;
error = cpcap_charger_set_state(ddata,
CPCAP_REG_CRM_VCHRG_4V35,
@@ -586,6 +601,7 @@ static int cpcap_charger_probe(struct platform_device *pdev)
{
struct cpcap_charger_ddata *ddata;
const struct of_device_id *of_id;
+ struct power_supply_config psy_cfg = {};
int error;
of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
@@ -614,9 +630,12 @@ static int cpcap_charger_probe(struct platform_device *pdev)
atomic_set(&ddata->active, 1);
+ psy_cfg.of_node = pdev->dev.of_node;
+ psy_cfg.drv_data = ddata;
+
ddata->usb = devm_power_supply_register(ddata->dev,
&cpcap_charger_usb_desc,
- NULL);
+ &psy_cfg);
if (IS_ERR(ddata->usb)) {
error = PTR_ERR(ddata->usb);
dev_err(ddata->dev, "failed to register USB charger: %i\n",
diff --git a/drivers/power/supply/ds2760_battery.c b/drivers/power/supply/ds2760_battery.c
index 17225689e3f6..ae180dc929c9 100644
--- a/drivers/power/supply/ds2760_battery.c
+++ b/drivers/power/supply/ds2760_battery.c
@@ -28,7 +28,7 @@
#include <linux/platform_device.h>
#include <linux/power_supply.h>
-#include "../../w1/w1.h"
+#include <linux/w1.h>
#include "../../w1/slaves/w1_ds2760.h"
struct ds2760_device_info {
diff --git a/drivers/power/supply/ds2780_battery.c b/drivers/power/supply/ds2780_battery.c
index 1b3b6fa89c28..8edd4aa5f475 100644
--- a/drivers/power/supply/ds2780_battery.c
+++ b/drivers/power/supply/ds2780_battery.c
@@ -21,7 +21,7 @@
#include <linux/power_supply.h>
#include <linux/idr.h>
-#include "../../w1/w1.h"
+#include <linux/w1.h>
#include "../../w1/slaves/w1_ds2780.h"
/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
diff --git a/drivers/power/supply/ds2781_battery.c b/drivers/power/supply/ds2781_battery.c
index cc0149131f89..4400402f9ec5 100644
--- a/drivers/power/supply/ds2781_battery.c
+++ b/drivers/power/supply/ds2781_battery.c
@@ -19,7 +19,7 @@
#include <linux/power_supply.h>
#include <linux/idr.h>
-#include "../../w1/w1.h"
+#include <linux/w1.h>
#include "../../w1/slaves/w1_ds2781.h"
/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
diff --git a/drivers/power/supply/ltc3651-charger.c b/drivers/power/supply/ltc3651-charger.c
new file mode 100644
index 000000000000..eea63ff211c4
--- /dev/null
+++ b/drivers/power/supply/ltc3651-charger.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2017, Topic Embedded Products
+ * Driver for LTC3651 charger IC.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+struct ltc3651_charger {
+ struct power_supply *charger;
+ struct power_supply_desc charger_desc;
+ struct gpio_desc *acpr_gpio;
+ struct gpio_desc *fault_gpio;
+ struct gpio_desc *chrg_gpio;
+};
+
+static irqreturn_t ltc3651_charger_irq(int irq, void *devid)
+{
+ struct power_supply *charger = devid;
+
+ power_supply_changed(charger);
+
+ return IRQ_HANDLED;
+}
+
+static inline struct ltc3651_charger *psy_to_ltc3651_charger(
+ struct power_supply *psy)
+{
+ return power_supply_get_drvdata(psy);
+}
+
+static int ltc3651_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp, union power_supply_propval *val)
+{
+ struct ltc3651_charger *ltc3651_charger = psy_to_ltc3651_charger(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!ltc3651_charger->chrg_gpio) {
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+ if (gpiod_get_value(ltc3651_charger->chrg_gpio))
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = gpiod_get_value(ltc3651_charger->acpr_gpio);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (!ltc3651_charger->fault_gpio) {
+ val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
+ break;
+ }
+ if (!gpiod_get_value(ltc3651_charger->fault_gpio)) {
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ }
+ /*
+ * If the fault pin is active, the chrg pin explains the type
+ * of failure.
+ */
+ if (!ltc3651_charger->chrg_gpio) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ }
+ val->intval = gpiod_get_value(ltc3651_charger->chrg_gpio) ?
+ POWER_SUPPLY_HEALTH_OVERHEAT :
+ POWER_SUPPLY_HEALTH_DEAD;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property ltc3651_charger_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+};
+
+static int ltc3651_charger_probe(struct platform_device *pdev)
+{
+ struct power_supply_config psy_cfg = {};
+ struct ltc3651_charger *ltc3651_charger;
+ struct power_supply_desc *charger_desc;
+ int ret;
+
+ ltc3651_charger = devm_kzalloc(&pdev->dev, sizeof(*ltc3651_charger),
+ GFP_KERNEL);
+ if (!ltc3651_charger)
+ return -ENOMEM;
+
+ ltc3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,
+ "lltc,acpr", GPIOD_IN);
+ if (IS_ERR(ltc3651_charger->acpr_gpio)) {
+ ret = PTR_ERR(ltc3651_charger->acpr_gpio);
+ dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);
+ return ret;
+ }
+ ltc3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,
+ "lltc,fault", GPIOD_IN);
+ if (IS_ERR(ltc3651_charger->fault_gpio)) {
+ ret = PTR_ERR(ltc3651_charger->fault_gpio);
+ dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);
+ return ret;
+ }
+ ltc3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,
+ "lltc,chrg", GPIOD_IN);
+ if (IS_ERR(ltc3651_charger->chrg_gpio)) {
+ ret = PTR_ERR(ltc3651_charger->chrg_gpio);
+ dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);
+ return ret;
+ }
+
+ charger_desc = &ltc3651_charger->charger_desc;
+ charger_desc->name = pdev->dev.of_node->name;
+ charger_desc->type = POWER_SUPPLY_TYPE_MAINS;
+ charger_desc->properties = ltc3651_charger_properties;
+ charger_desc->num_properties = ARRAY_SIZE(ltc3651_charger_properties);
+ charger_desc->get_property = ltc3651_charger_get_property;
+ psy_cfg.of_node = pdev->dev.of_node;
+ psy_cfg.drv_data = ltc3651_charger;
+
+ ltc3651_charger->charger = devm_power_supply_register(&pdev->dev,
+ charger_desc, &psy_cfg);
+ if (IS_ERR(ltc3651_charger->charger)) {
+ ret = PTR_ERR(ltc3651_charger->charger);
+ dev_err(&pdev->dev, "Failed to register power supply: %d\n",
+ ret);
+ return ret;
+ }
+
+ /*
+ * Acquire IRQs for the GPIO pins if possible. If the system does not
+ * support IRQs on these pins, userspace will have to poll the sysfs
+ * files manually.
+ */
+ if (ltc3651_charger->acpr_gpio) {
+ ret = gpiod_to_irq(ltc3651_charger->acpr_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ ltc3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), ltc3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request acpr irq\n");
+ }
+ if (ltc3651_charger->fault_gpio) {
+ ret = gpiod_to_irq(ltc3651_charger->fault_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ ltc3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), ltc3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request fault irq\n");
+ }
+ if (ltc3651_charger->chrg_gpio) {
+ ret = gpiod_to_irq(ltc3651_charger->chrg_gpio);
+ if (ret >= 0)
+ ret = devm_request_any_context_irq(&pdev->dev, ret,
+ ltc3651_charger_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ dev_name(&pdev->dev), ltc3651_charger->charger);
+ if (ret < 0)
+ dev_warn(&pdev->dev, "Failed to request chrg irq\n");
+ }
+
+ platform_set_drvdata(pdev, ltc3651_charger);
+
+ return 0;
+}
+
+static const struct of_device_id ltc3651_charger_match[] = {
+ { .compatible = "lltc,ltc3651-charger" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ltc3651_charger_match);
+
+static struct platform_driver ltc3651_charger_driver = {
+ .probe = ltc3651_charger_probe,
+ .driver = {
+ .name = "ltc3651-charger",
+ .of_match_table = ltc3651_charger_match,
+ },
+};
+
+module_platform_driver(ltc3651_charger_driver);
+
+MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>");
+MODULE_DESCRIPTION("Driver for LTC3651 charger");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ltc3651-charger");
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 7ec7c7c202bd..540d3e0aa011 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -17,6 +17,7 @@
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/err.h>
+#include <linux/of.h>
#include <linux/power_supply.h>
#include <linux/thermal.h>
#include "power_supply.h"
@@ -274,8 +275,30 @@ static int power_supply_check_supplies(struct power_supply *psy)
return power_supply_populate_supplied_from(psy);
}
#else
-static inline int power_supply_check_supplies(struct power_supply *psy)
+static int power_supply_check_supplies(struct power_supply *psy)
{
+ int nval, ret;
+
+ if (!psy->dev.parent)
+ return 0;
+
+ nval = device_property_read_string_array(psy->dev.parent,
+ "supplied-from", NULL, 0);
+ if (nval <= 0)
+ return 0;
+
+ psy->supplied_from = devm_kmalloc_array(&psy->dev, nval,
+ sizeof(char *), GFP_KERNEL);
+ if (!psy->supplied_from)
+ return -ENOMEM;
+
+ ret = device_property_read_string_array(psy->dev.parent,
+ "supplied-from", (const char **)psy->supplied_from, nval);
+ if (ret < 0)
+ return ret;
+
+ psy->num_supplies = nval;
+
return 0;
}
#endif
@@ -497,6 +520,62 @@ struct power_supply *devm_power_supply_get_by_phandle(struct device *dev,
EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle);
#endif /* CONFIG_OF */
+int power_supply_get_battery_info(struct power_supply *psy,
+ struct power_supply_battery_info *info)
+{
+ struct device_node *battery_np;
+ const char *value;
+ int err;
+
+ info->energy_full_design_uwh = -EINVAL;
+ info->charge_full_design_uah = -EINVAL;
+ info->voltage_min_design_uv = -EINVAL;
+ info->precharge_current_ua = -EINVAL;
+ info->charge_term_current_ua = -EINVAL;
+ info->constant_charge_current_max_ua = -EINVAL;
+ info->constant_charge_voltage_max_uv = -EINVAL;
+
+ if (!psy->of_node) {
+ dev_warn(&psy->dev, "%s currently only supports devicetree\n",
+ __func__);
+ return -ENXIO;
+ }
+
+ battery_np = of_parse_phandle(psy->of_node, "monitored-battery", 0);
+ if (!battery_np)
+ return -ENODEV;
+
+ err = of_property_read_string(battery_np, "compatible", &value);
+ if (err)
+ return err;
+
+ if (strcmp("simple-battery", value))
+ return -ENODEV;
+
+ /* The property and field names below must correspond to elements
+ * in enum power_supply_property. For reasoning, see
+ * Documentation/power/power_supply_class.txt.
+ */
+
+ of_property_read_u32(battery_np, "energy-full-design-microwatt-hours",
+ &info->energy_full_design_uwh);
+ of_property_read_u32(battery_np, "charge-full-design-microamp-hours",
+ &info->charge_full_design_uah);
+ of_property_read_u32(battery_np, "voltage-min-design-microvolt",
+ &info->voltage_min_design_uv);
+ of_property_read_u32(battery_np, "precharge-current-microamp",
+ &info->precharge_current_ua);
+ of_property_read_u32(battery_np, "charge-term-current-microamp",
+ &info->charge_term_current_ua);
+ of_property_read_u32(battery_np, "constant_charge_current_max_microamp",
+ &info->constant_charge_current_max_ua);
+ of_property_read_u32(battery_np, "constant_charge_voltage_max_microvolt",
+ &info->constant_charge_voltage_max_uv);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_battery_info);
+
int power_supply_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@@ -669,7 +748,7 @@ static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
return ret;
}
-static struct thermal_cooling_device_ops psy_tcd_ops = {
+static const struct thermal_cooling_device_ops psy_tcd_ops = {
.get_max_state = ps_get_max_charge_cntl_limit,
.get_cur_state = ps_get_cur_chrage_cntl_limit,
.set_cur_state = ps_set_cur_charge_cntl_limit,
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index bcde8d13476a..5204f115970f 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -40,35 +40,42 @@
static struct device_attribute power_supply_attrs[];
+static const char * const power_supply_type_text[] = {
+ "Unknown", "Battery", "UPS", "Mains", "USB",
+ "USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
+ "USB_PD", "USB_PD_DRP", "BrickID"
+};
+
+static const char * const power_supply_status_text[] = {
+ "Unknown", "Charging", "Discharging", "Not charging", "Full"
+};
+
+static const char * const power_supply_charge_type_text[] = {
+ "Unknown", "N/A", "Trickle", "Fast"
+};
+
+static const char * const power_supply_health_text[] = {
+ "Unknown", "Good", "Overheat", "Dead", "Over voltage",
+ "Unspecified failure", "Cold", "Watchdog timer expire",
+ "Safety timer expire"
+};
+
+static const char * const power_supply_technology_text[] = {
+ "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
+ "LiMn"
+};
+
+static const char * const power_supply_capacity_level_text[] = {
+ "Unknown", "Critical", "Low", "Normal", "High", "Full"
+};
+
+static const char * const power_supply_scope_text[] = {
+ "Unknown", "System", "Device"
+};
+
static ssize_t power_supply_show_property(struct device *dev,
struct device_attribute *attr,
char *buf) {
- static char *type_text[] = {
- "Unknown", "Battery", "UPS", "Mains", "USB",
- "USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
- "USB_PD", "USB_PD_DRP"
- };
- static char *status_text[] = {
- "Unknown", "Charging", "Discharging", "Not charging", "Full"
- };
- static char *charge_type[] = {
- "Unknown", "N/A", "Trickle", "Fast"
- };
- static char *health_text[] = {
- "Unknown", "Good", "Overheat", "Dead", "Over voltage",
- "Unspecified failure", "Cold", "Watchdog timer expire",
- "Safety timer expire"
- };
- static char *technology_text[] = {
- "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
- "LiMn"
- };
- static char *capacity_level_text[] = {
- "Unknown", "Critical", "Low", "Normal", "High", "Full"
- };
- static char *scope_text[] = {
- "Unknown", "System", "Device"
- };
ssize_t ret = 0;
struct power_supply *psy = dev_get_drvdata(dev);
const ptrdiff_t off = attr - power_supply_attrs;
@@ -91,19 +98,26 @@ static ssize_t power_supply_show_property(struct device *dev,
}
if (off == POWER_SUPPLY_PROP_STATUS)
- return sprintf(buf, "%s\n", status_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_status_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
- return sprintf(buf, "%s\n", charge_type[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_charge_type_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_HEALTH)
- return sprintf(buf, "%s\n", health_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_health_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
- return sprintf(buf, "%s\n", technology_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_technology_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
- return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_capacity_level_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_TYPE)
- return sprintf(buf, "%s\n", type_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_type_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_SCOPE)
- return sprintf(buf, "%s\n", scope_text[value.intval]);
+ return sprintf(buf, "%s\n",
+ power_supply_scope_text[value.intval]);
else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
return sprintf(buf, "%s\n", value.strval);
@@ -117,14 +131,46 @@ static ssize_t power_supply_store_property(struct device *dev,
struct power_supply *psy = dev_get_drvdata(dev);
const ptrdiff_t off = attr - power_supply_attrs;
union power_supply_propval value;
- long long_val;
- /* TODO: support other types than int */
- ret = kstrtol(buf, 10, &long_val);
- if (ret < 0)
- return ret;
+ /* maybe it is a enum property? */
+ switch (off) {
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = sysfs_match_string(power_supply_status_text, buf);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = sysfs_match_string(power_supply_charge_type_text, buf);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = sysfs_match_string(power_supply_health_text, buf);
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ ret = sysfs_match_string(power_supply_technology_text, buf);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ ret = sysfs_match_string(power_supply_capacity_level_text, buf);
+ break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ ret = sysfs_match_string(power_supply_scope_text, buf);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ /*
+ * If no match was found, then check to see if it is an integer.
+ * Integer values are valid for enums in addition to the text value.
+ */
+ if (ret < 0) {
+ long long_val;
+
+ ret = kstrtol(buf, 10, &long_val);
+ if (ret < 0)
+ return ret;
+
+ ret = long_val;
+ }
- value.intval = long_val;
+ value.intval = ret;
ret = power_supply_set_property(psy, off, &value);
if (ret < 0)
@@ -196,6 +242,7 @@ static struct device_attribute power_supply_attrs[] = {
POWER_SUPPLY_ATTR(time_to_full_avg),
POWER_SUPPLY_ATTR(type),
POWER_SUPPLY_ATTR(scope),
+ POWER_SUPPLY_ATTR(precharge_current),
POWER_SUPPLY_ATTR(charge_term_current),
POWER_SUPPLY_ATTR(calibrate),
/* Properties of type `const char *' */
diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
index e3a114e60f1a..f7059459f0fb 100644
--- a/drivers/power/supply/sbs-battery.c
+++ b/drivers/power/supply/sbs-battery.c
@@ -171,6 +171,7 @@ struct sbs_info {
u32 i2c_retry_count;
u32 poll_retry_count;
struct delayed_work work;
+ struct mutex mode_lock;
};
static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
@@ -199,7 +200,7 @@ static int sbs_read_word_data(struct i2c_client *client, u8 address)
return ret;
}
- return le16_to_cpu(ret);
+ return ret;
}
static int sbs_read_string_data(struct i2c_client *client, u8 address,
@@ -265,7 +266,7 @@ static int sbs_read_string_data(struct i2c_client *client, u8 address,
memcpy(values, block_buffer + 1, block_length);
values[block_length] = '\0';
- return le16_to_cpu(ret);
+ return ret;
}
static int sbs_write_word_data(struct i2c_client *client, u8 address,
@@ -278,8 +279,7 @@ static int sbs_write_word_data(struct i2c_client *client, u8 address,
retries = chip->i2c_retry_count;
while (retries > 0) {
- ret = i2c_smbus_write_word_data(client, address,
- le16_to_cpu(value));
+ ret = i2c_smbus_write_word_data(client, address, value);
if (ret >= 0)
break;
retries--;
@@ -438,6 +438,11 @@ static int sbs_get_battery_property(struct i2c_client *client,
} else {
if (psp == POWER_SUPPLY_PROP_STATUS)
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ else if (psp == POWER_SUPPLY_PROP_CAPACITY)
+ /* sbs spec says that this can be >100 %
+ * even if max value is 100 %
+ */
+ val->intval = min(ret, 100);
else
val->intval = 0;
}
@@ -548,12 +553,7 @@ static int sbs_get_battery_capacity(struct i2c_client *client,
if (ret < 0)
return ret;
- if (psp == POWER_SUPPLY_PROP_CAPACITY) {
- /* sbs spec says that this can be >100 %
- * even if max value is 100 % */
- val->intval = min(ret, 100);
- } else
- val->intval = ret;
+ val->intval = ret;
ret = sbs_set_battery_mode(client, mode);
if (ret < 0)
@@ -618,12 +618,17 @@ static int sbs_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_CHARGE_NOW:
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
- case POWER_SUPPLY_PROP_CAPACITY:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
break;
+ /* sbs_get_battery_capacity() will change the battery mode
+ * temporarily to read the requested attribute. Ensure we stay
+ * in the desired mode for the duration of the attribute read.
+ */
+ mutex_lock(&chip->mode_lock);
ret = sbs_get_battery_capacity(client, ret, psp, val);
+ mutex_unlock(&chip->mode_lock);
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
@@ -640,6 +645,7 @@ static int sbs_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ case POWER_SUPPLY_PROP_CAPACITY:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
break;
@@ -808,6 +814,7 @@ static int sbs_probe(struct i2c_client *client,
psy_cfg.of_node = client->dev.of_node;
psy_cfg.drv_data = chip;
chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
+ mutex_init(&chip->mode_lock);
/* use pdata if available, fall back to DT properties,
* or hardcoded defaults if not
diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index 2f82d0e9ec1b..3de802f169a1 100644
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -153,7 +153,7 @@ struct twl4030_bci {
};
/* strings for 'usb_mode' values */
-static char *modes[] = { "off", "auto", "continuous" };
+static const char *modes[] = { "off", "auto", "continuous" };
/*
* clear and set bits on an given register on a given module
@@ -624,63 +624,6 @@ static irqreturn_t twl4030_bci_interrupt(int irq, void *arg)
return IRQ_HANDLED;
}
-/*
- * Provide "max_current" attribute in sysfs.
- */
-static ssize_t
-twl4030_bci_max_current_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t n)
-{
- struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
- int cur = 0;
- int status = 0;
- status = kstrtoint(buf, 10, &cur);
- if (status)
- return status;
- if (cur < 0)
- return -EINVAL;
- if (dev == &bci->ac->dev)
- bci->ac_cur = cur;
- else
- bci->usb_cur_target = cur;
-
- twl4030_charger_update_current(bci);
- return n;
-}
-
-/*
- * sysfs max_current show
- */
-static ssize_t twl4030_bci_max_current_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int status = 0;
- int cur = -1;
- u8 bcictl1;
- struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
-
- if (dev == &bci->ac->dev) {
- if (!bci->ac_is_active)
- cur = bci->ac_cur;
- } else {
- if (bci->ac_is_active)
- cur = bci->usb_cur_target;
- }
- if (cur < 0) {
- cur = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
- if (cur < 0)
- return cur;
- status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1);
- if (status < 0)
- return status;
- cur = regval2ua(cur, bcictl1 & TWL4030_CGAIN);
- }
- return scnprintf(buf, PAGE_SIZE, "%u\n", cur);
-}
-
-static DEVICE_ATTR(max_current, 0644, twl4030_bci_max_current_show,
- twl4030_bci_max_current_store);
-
static void twl4030_bci_usb_work(struct work_struct *data)
{
struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work);
@@ -726,14 +669,10 @@ twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr,
int mode;
int status;
- if (sysfs_streq(buf, modes[0]))
- mode = 0;
- else if (sysfs_streq(buf, modes[1]))
- mode = 1;
- else if (sysfs_streq(buf, modes[2]))
- mode = 2;
- else
- return -EINVAL;
+ mode = sysfs_match_string(modes, buf);
+ if (mode < 0)
+ return mode;
+
if (dev == &bci->ac->dev) {
if (mode == 2)
return -EINVAL;
@@ -1041,6 +980,12 @@ static int twl4030_bci_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, bci);
+ bci->channel_vac = devm_iio_channel_get(&pdev->dev, "vac");
+ if (IS_ERR(bci->channel_vac)) {
+ bci->channel_vac = NULL;
+ dev_warn(&pdev->dev, "could not request vac iio channel");
+ }
+
bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc,
NULL);
if (IS_ERR(bci->ac)) {
@@ -1074,12 +1019,6 @@ static int twl4030_bci_probe(struct platform_device *pdev)
return ret;
}
- bci->channel_vac = iio_channel_get(&pdev->dev, "vac");
- if (IS_ERR(bci->channel_vac)) {
- bci->channel_vac = NULL;
- dev_warn(&pdev->dev, "could not request vac iio channel");
- }
-
INIT_WORK(&bci->work, twl4030_bci_usb_work);
INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker);
@@ -1101,7 +1040,7 @@ static int twl4030_bci_probe(struct platform_device *pdev)
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
- goto fail;
+ return ret;
}
reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
@@ -1111,14 +1050,10 @@ static int twl4030_bci_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
twl4030_charger_update_current(bci);
- if (device_create_file(&bci->usb->dev, &dev_attr_max_current))
- dev_warn(&pdev->dev, "could not create sysfs file\n");
if (device_create_file(&bci->usb->dev, &dev_attr_mode))
dev_warn(&pdev->dev, "could not create sysfs file\n");
if (device_create_file(&bci->ac->dev, &dev_attr_mode))
dev_warn(&pdev->dev, "could not create sysfs file\n");
- if (device_create_file(&bci->ac->dev, &dev_attr_max_current))
- dev_warn(&pdev->dev, "could not create sysfs file\n");
twl4030_charger_enable_ac(bci, true);
if (!IS_ERR_OR_NULL(bci->transceiver))
@@ -1134,10 +1069,6 @@ static int twl4030_bci_probe(struct platform_device *pdev)
twl4030_charger_enable_backup(0, 0);
return 0;
-fail:
- iio_channel_release(bci->channel_vac);
-
- return ret;
}
static int twl4030_bci_remove(struct platform_device *pdev)
@@ -1148,11 +1079,7 @@ static int twl4030_bci_remove(struct platform_device *pdev)
twl4030_charger_enable_usb(bci, false);
twl4030_charger_enable_backup(0, 0);
- iio_channel_release(bci->channel_vac);
-
- device_remove_file(&bci->usb->dev, &dev_attr_max_current);
device_remove_file(&bci->usb->dev, &dev_attr_mode);
- device_remove_file(&bci->ac->dev, &dev_attr_max_current);
device_remove_file(&bci->ac->dev, &dev_attr_mode);
/* mask interrupts */
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-29 05:23:25 +0300