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-rw-r--r--drivers/regulator/Kconfig9
-rw-r--r--drivers/regulator/Makefile1
-rw-r--r--drivers/regulator/fan53555.c24
-rw-r--r--drivers/regulator/lp3971.c2
-rw-r--r--drivers/regulator/lp3972.c2
-rw-r--r--drivers/regulator/lp873x-regulator.c241
-rw-r--r--drivers/regulator/max77620-regulator.c83
7 files changed, 333 insertions, 29 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index c77dc08b1202..4d2d737f8c7e 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -321,6 +321,15 @@ config REGULATOR_LP872X
help
This driver supports LP8720/LP8725 PMIC
+config REGULATOR_LP873X
+ tristate "TI LP873X Power regulators"
+ depends on MFD_LP873X && OF
+ help
+ This driver supports LP873X voltage regulator chips. LP873X
+ provides two step-down converters and two general-purpose LDO
+ voltage regulators. It supports software based voltage control
+ for different voltage domains
+
config REGULATOR_LP8755
tristate "TI LP8755 High Performance PMU driver"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 61bfbb9d4a0c..7182b5f7c3e7 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o
obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o
+obj-$(CONFIG_REGULATOR_LP873X) += lp873x-regulator.o
obj-$(CONFIG_REGULATOR_LP8788) += lp8788-buck.o
obj-$(CONFIG_REGULATOR_LP8788) += lp8788-ldo.o
obj-$(CONFIG_REGULATOR_LP8755) += lp8755.o
diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index 2cb5cc311610..d7da81a875cf 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -65,6 +65,13 @@ enum {
FAN53555_CHIP_ID_03,
FAN53555_CHIP_ID_04,
FAN53555_CHIP_ID_05,
+ FAN53555_CHIP_ID_08 = 8,
+};
+
+/* IC mask revision */
+enum {
+ FAN53555_CHIP_REV_00 = 0x3,
+ FAN53555_CHIP_REV_13 = 0xf,
};
enum {
@@ -217,9 +224,26 @@ static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
/* Init voltage range and step */
switch (di->chip_id) {
case FAN53555_CHIP_ID_00:
+ switch (di->chip_rev) {
+ case FAN53555_CHIP_REV_00:
+ di->vsel_min = 600000;
+ di->vsel_step = 10000;
+ break;
+ case FAN53555_CHIP_REV_13:
+ di->vsel_min = 800000;
+ di->vsel_step = 10000;
+ break;
+ default:
+ dev_err(di->dev,
+ "Chip ID %d with rev %d not supported!\n",
+ di->chip_id, di->chip_rev);
+ return -EINVAL;
+ }
+ break;
case FAN53555_CHIP_ID_01:
case FAN53555_CHIP_ID_03:
case FAN53555_CHIP_ID_05:
+ case FAN53555_CHIP_ID_08:
di->vsel_min = 600000;
di->vsel_step = 10000;
break;
diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c
index 15c25c622edf..204b5c5270e0 100644
--- a/drivers/regulator/lp3971.c
+++ b/drivers/regulator/lp3971.c
@@ -365,8 +365,8 @@ static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val)
mutex_lock(&lp3971->io_lock);
ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp);
- tmp = (tmp & ~mask) | val;
if (ret == 0) {
+ tmp = (tmp & ~mask) | val;
ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp);
dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
(unsigned)val&0xff);
diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c
index 3a7e96e2c7b3..ff0c275f902e 100644
--- a/drivers/regulator/lp3972.c
+++ b/drivers/regulator/lp3972.c
@@ -211,8 +211,8 @@ static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
mutex_lock(&lp3972->io_lock);
ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
- tmp = (tmp & ~mask) | val;
if (ret == 0) {
+ tmp = (tmp & ~mask) | val;
ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
(unsigned)val & 0xff);
diff --git a/drivers/regulator/lp873x-regulator.c b/drivers/regulator/lp873x-regulator.c
new file mode 100644
index 000000000000..b4ffd113ba21
--- /dev/null
+++ b/drivers/regulator/lp873x-regulator.c
@@ -0,0 +1,241 @@
+/*
+ * Regulator driver for LP873X PMIC
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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 expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License version 2 for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+#define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
+ _delay, _lr, _nlr, _cr) \
+ [_id] = { \
+ .desc = { \
+ .name = _name, \
+ .id = _id, \
+ .of_match = of_match_ptr(_of), \
+ .regulators_node = of_match_ptr("regulators"),\
+ .ops = &_ops, \
+ .n_voltages = _n, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .vsel_reg = _vr, \
+ .vsel_mask = _vm, \
+ .enable_reg = _er, \
+ .enable_mask = _em, \
+ .ramp_delay = _delay, \
+ .linear_ranges = _lr, \
+ .n_linear_ranges = _nlr, \
+ }, \
+ .ctrl2_reg = _cr, \
+ }
+
+struct lp873x_regulator {
+ struct regulator_desc desc;
+ unsigned int ctrl2_reg;
+};
+
+static const struct lp873x_regulator regulators[];
+
+static const struct regulator_linear_range buck0_buck1_ranges[] = {
+ REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0),
+ REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000),
+ REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
+ REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
+};
+
+static const struct regulator_linear_range ldo0_ldo1_ranges[] = {
+ REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000),
+};
+
+static unsigned int lp873x_buck_ramp_delay[] = {
+ 30000, 15000, 10000, 7500, 3800, 1900, 940, 470
+};
+
+/* LP873X BUCK current limit */
+static const unsigned int lp873x_buck_uA[] = {
+ 1500000, 2000000, 2500000, 3000000, 3500000, 4000000,
+};
+
+static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ int id = rdev_get_id(rdev);
+ struct lp873x *lp873 = rdev_get_drvdata(rdev);
+ unsigned int reg;
+ int ret;
+
+ if (ramp_delay <= 470)
+ reg = 7;
+ else if (ramp_delay <= 940)
+ reg = 6;
+ else if (ramp_delay <= 1900)
+ reg = 5;
+ else if (ramp_delay <= 3800)
+ reg = 4;
+ else if (ramp_delay <= 7500)
+ reg = 3;
+ else if (ramp_delay <= 10000)
+ reg = 2;
+ else if (ramp_delay <= 15000)
+ reg = 1;
+ else
+ reg = 0;
+
+ ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,
+ LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,
+ reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE));
+ if (ret) {
+ dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);
+ return ret;
+ }
+
+ rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg];
+
+ return 0;
+}
+
+static int lp873x_buck_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ int id = rdev_get_id(rdev);
+ struct lp873x *lp873 = rdev_get_drvdata(rdev);
+ int i;
+
+ for (i = ARRAY_SIZE(lp873x_buck_uA) - 1; i >= 0; i--) {
+ if (lp873x_buck_uA[i] >= min_uA &&
+ lp873x_buck_uA[i] <= max_uA)
+ return regmap_update_bits(lp873->regmap,
+ regulators[id].ctrl2_reg,
+ LP873X_BUCK0_CTRL_2_BUCK0_ILIM,
+ i << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM));
+ }
+
+ return -EINVAL;
+}
+
+static int lp873x_buck_get_current_limit(struct regulator_dev *rdev)
+{
+ int id = rdev_get_id(rdev);
+ struct lp873x *lp873 = rdev_get_drvdata(rdev);
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(lp873->regmap, regulators[id].ctrl2_reg, &val);
+ if (ret)
+ return ret;
+
+ val = (val & LP873X_BUCK0_CTRL_2_BUCK0_ILIM) >>
+ __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM);
+
+ return (val < ARRAY_SIZE(lp873x_buck_uA)) ?
+ lp873x_buck_uA[val] : -EINVAL;
+}
+
+/* Operations permitted on BUCK0, BUCK1 */
+static struct regulator_ops lp873x_buck01_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = lp873x_buck_set_ramp_delay,
+ .set_current_limit = lp873x_buck_set_current_limit,
+ .get_current_limit = lp873x_buck_get_current_limit,
+};
+
+/* Operations permitted on LDO0 and LDO1 */
+static struct regulator_ops lp873x_ldo01_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+};
+
+static const struct lp873x_regulator regulators[] = {
+ LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops,
+ 256, LP873X_REG_BUCK0_VOUT,
+ LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1,
+ LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000,
+ buck0_buck1_ranges, 4, LP873X_REG_BUCK0_CTRL_2),
+ LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops,
+ 256, LP873X_REG_BUCK1_VOUT,
+ LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1,
+ LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000,
+ buck0_buck1_ranges, 4, LP873X_REG_BUCK1_CTRL_2),
+ LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26,
+ LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET,
+ LP873X_REG_LDO0_CTRL,
+ LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 1,
+ 0xFF),
+ LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26,
+ LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET,
+ LP873X_REG_LDO1_CTRL,
+ LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 1,
+ 0xFF),
+};
+
+static int lp873x_regulator_probe(struct platform_device *pdev)
+{
+ struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_config config = { };
+ struct regulator_dev *rdev;
+ int i;
+
+ platform_set_drvdata(pdev, lp873);
+
+ config.dev = &pdev->dev;
+ config.dev->of_node = lp873->dev->of_node;
+ config.driver_data = lp873;
+ config.regmap = lp873->regmap;
+
+ for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+ rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
+ &config);
+ if (IS_ERR(rdev)) {
+ dev_err(lp873->dev, "failed to register %s regulator\n",
+ pdev->name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id lp873x_regulator_id_table[] = {
+ { "lp873x-regulator", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table);
+
+static struct platform_driver lp873x_regulator_driver = {
+ .driver = {
+ .name = "lp873x-pmic",
+ },
+ .probe = lp873x_regulator_probe,
+ .id_table = lp873x_regulator_id_table,
+};
+module_platform_driver(lp873x_regulator_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X voltage regulator driver");
+MODULE_ALIAS("platform:lp873x-pmic");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/regulator/max77620-regulator.c b/drivers/regulator/max77620-regulator.c
index 73a3356a5c19..321e804aeab0 100644
--- a/drivers/regulator/max77620-regulator.c
+++ b/drivers/regulator/max77620-regulator.c
@@ -81,6 +81,7 @@ struct max77620_regulator_pdata {
int suspend_fps_pd_slot;
int suspend_fps_pu_slot;
int current_mode;
+ int ramp_rate_setting;
};
struct max77620_regulator {
@@ -307,6 +308,43 @@ static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
return 0;
}
+static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
+ int slew_rate)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int val;
+ int ret;
+ u8 mask;
+
+ if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
+ if (slew_rate <= 13750)
+ val = 0;
+ else if (slew_rate <= 27500)
+ val = 1;
+ else if (slew_rate <= 55000)
+ val = 2;
+ else
+ val = 3;
+ val <<= MAX77620_SD_SR_SHIFT;
+ mask = MAX77620_SD_SR_MASK;
+ } else {
+ if (slew_rate <= 5000)
+ val = 1;
+ else
+ val = 0;
+ mask = MAX77620_LDO_SLEW_RATE_MASK;
+ }
+
+ ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n",
+ id, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
@@ -351,6 +389,13 @@ static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
if (ret < 0)
return ret;
+ if (rpdata->ramp_rate_setting) {
+ ret = max77620_set_slew_rate(pmic, id,
+ rpdata->ramp_rate_setting);
+ if (ret < 0)
+ return ret;
+ }
+
return 0;
}
@@ -502,35 +547,16 @@ static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
{
struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
- struct max77620_regulator_info *rinfo = pmic->rinfo[id];
- int ret, val;
- u8 mask;
-
- if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
- if (ramp_delay <= 13750)
- val = 0;
- else if (ramp_delay <= 27500)
- val = 1;
- else if (ramp_delay <= 55000)
- val = 2;
- else
- val = 3;
- val <<= MAX77620_SD_SR_SHIFT;
- mask = MAX77620_SD_SR_MASK;
- } else {
- if (ramp_delay <= 5000)
- val = 1;
- else
- val = 0;
- mask = MAX77620_LDO_SLEW_RATE_MASK;
- }
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
- ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
- if (ret < 0)
- dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
- rinfo->cfg_addr, ret);
+ /* Device specific ramp rate setting tells that platform has
+ * different ramp rate from advertised value. In this case,
+ * do not configure anything and just return success.
+ */
+ if (rpdata->ramp_rate_setting)
+ return 0;
- return ret;
+ return max77620_set_slew_rate(pmic, id, ramp_delay);
}
static int max77620_of_parse_cb(struct device_node *np,
@@ -563,6 +589,9 @@ static int max77620_of_parse_cb(struct device_node *np,
np, "maxim,suspend-fps-power-down-slot", &pval);
rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
+ ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
+ rpdata->ramp_rate_setting = (!ret) ? pval : 0;
+
return max77620_init_pmic(pmic, desc->id);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-01 23:00:14 +0300