diff options
| -rw-r--r-- | drivers/mfd/da9150-core.c | 156 | ||||
| -rw-r--r-- | include/linux/mfd/da9150/core.h | 19 |
2 files changed, 167 insertions, 8 deletions
diff --git a/drivers/mfd/da9150-core.c b/drivers/mfd/da9150-core.c index 94b9bbd1a69b..85ca4b5d0678 100644 --- a/drivers/mfd/da9150-core.c +++ b/drivers/mfd/da9150-core.c @@ -23,6 +23,77 @@ #include <linux/mfd/da9150/core.h> #include <linux/mfd/da9150/registers.h> +/* Raw device access, used for QIF */ +static int da9150_i2c_read_device(struct i2c_client *client, u8 addr, int count, + u8 *buf) +{ + struct i2c_msg xfer; + int ret; + + /* + * Read is split into two transfers as device expects STOP/START rather + * than repeated start to carry out this kind of access. + */ + + /* Write address */ + xfer.addr = client->addr; + xfer.flags = 0; + xfer.len = 1; + xfer.buf = &addr; + + ret = i2c_transfer(client->adapter, &xfer, 1); + if (ret != 1) { + if (ret < 0) + return ret; + else + return -EIO; + } + + /* Read data */ + xfer.addr = client->addr; + xfer.flags = I2C_M_RD; + xfer.len = count; + xfer.buf = buf; + + ret = i2c_transfer(client->adapter, &xfer, 1); + if (ret == 1) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + +static int da9150_i2c_write_device(struct i2c_client *client, u8 addr, + int count, const u8 *buf) +{ + struct i2c_msg xfer; + u8 *reg_data; + int ret; + + reg_data = kzalloc(1 + count, GFP_KERNEL); + if (!reg_data) + return -ENOMEM; + + reg_data[0] = addr; + memcpy(®_data[1], buf, count); + + /* Write address & data */ + xfer.addr = client->addr; + xfer.flags = 0; + xfer.len = 1 + count; + xfer.buf = reg_data; + + ret = i2c_transfer(client->adapter, &xfer, 1); + kfree(reg_data); + if (ret == 1) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + static bool da9150_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -107,6 +178,28 @@ static const struct regmap_config da9150_regmap_config = { .volatile_reg = da9150_volatile_reg, }; +void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf) +{ + int ret; + + ret = da9150_i2c_read_device(da9150->core_qif, addr, count, buf); + if (ret < 0) + dev_err(da9150->dev, "Failed to read from QIF 0x%x: %d\n", + addr, ret); +} +EXPORT_SYMBOL_GPL(da9150_read_qif); + +void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf) +{ + int ret; + + ret = da9150_i2c_write_device(da9150->core_qif, addr, count, buf); + if (ret < 0) + dev_err(da9150->dev, "Failed to write to QIF 0x%x: %d\n", + addr, ret); +} +EXPORT_SYMBOL_GPL(da9150_write_qif); + u8 da9150_reg_read(struct da9150 *da9150, u16 reg) { int val, ret; @@ -297,19 +390,35 @@ static struct resource da9150_charger_resources[] = { }, }; +static struct resource da9150_fg_resources[] = { + DEFINE_RES_IRQ_NAMED(DA9150_IRQ_FG, "FG"), +}; + +enum da9150_dev_idx { + DA9150_GPADC_IDX = 0, + DA9150_CHARGER_IDX, + DA9150_FG_IDX, +}; + static struct mfd_cell da9150_devs[] = { - { + [DA9150_GPADC_IDX] = { .name = "da9150-gpadc", .of_compatible = "dlg,da9150-gpadc", .resources = da9150_gpadc_resources, .num_resources = ARRAY_SIZE(da9150_gpadc_resources), }, - { + [DA9150_CHARGER_IDX] = { .name = "da9150-charger", .of_compatible = "dlg,da9150-charger", .resources = da9150_charger_resources, .num_resources = ARRAY_SIZE(da9150_charger_resources), }, + [DA9150_FG_IDX] = { + .name = "da9150-fuel-gauge", + .of_compatible = "dlg,da9150-fuel-gauge", + .resources = da9150_fg_resources, + .num_resources = ARRAY_SIZE(da9150_fg_resources), + }, }; static int da9150_probe(struct i2c_client *client, @@ -317,6 +426,7 @@ static int da9150_probe(struct i2c_client *client, { struct da9150 *da9150; struct da9150_pdata *pdata = dev_get_platdata(&client->dev); + int qif_addr; int ret; da9150 = devm_kzalloc(&client->dev, sizeof(*da9150), GFP_KERNEL); @@ -335,16 +445,41 @@ static int da9150_probe(struct i2c_client *client, return ret; } - da9150->irq_base = pdata ? pdata->irq_base : -1; + /* Setup secondary I2C interface for QIF access */ + qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A); + qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1; + qif_addr |= DA9150_QIF_I2C_ADDR_LSB; + da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr); + if (!da9150->core_qif) { + dev_err(da9150->dev, "Failed to attach QIF client\n"); + return -ENODEV; + } + + i2c_set_clientdata(da9150->core_qif, da9150); + + if (pdata) { + da9150->irq_base = pdata->irq_base; + + da9150_devs[DA9150_FG_IDX].platform_data = pdata->fg_pdata; + da9150_devs[DA9150_FG_IDX].pdata_size = + sizeof(struct da9150_fg_pdata); + } else { + da9150->irq_base = -1; + } ret = regmap_add_irq_chip(da9150->regmap, da9150->irq, IRQF_TRIGGER_LOW | IRQF_ONESHOT, da9150->irq_base, &da9150_regmap_irq_chip, &da9150->regmap_irq_data); - if (ret) - return ret; + if (ret) { + dev_err(da9150->dev, "Failed to add regmap irq chip: %d\n", + ret); + goto regmap_irq_fail; + } + da9150->irq_base = regmap_irq_chip_get_base(da9150->regmap_irq_data); + enable_irq_wake(da9150->irq); ret = mfd_add_devices(da9150->dev, -1, da9150_devs, @@ -352,11 +487,17 @@ static int da9150_probe(struct i2c_client *client, da9150->irq_base, NULL); if (ret) { dev_err(da9150->dev, "Failed to add child devices: %d\n", ret); - regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); - return ret; + goto mfd_fail; } return 0; + +mfd_fail: + regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); +regmap_irq_fail: + i2c_unregister_device(da9150->core_qif); + + return ret; } static int da9150_remove(struct i2c_client *client) @@ -365,6 +506,7 @@ static int da9150_remove(struct i2c_client *client) regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data); mfd_remove_devices(da9150->dev); + i2c_unregister_device(da9150->core_qif); return 0; } diff --git a/include/linux/mfd/da9150/core.h b/include/linux/mfd/da9150/core.h index 76e668933a77..1bf50caeb9fa 100644 --- a/include/linux/mfd/da9150/core.h +++ b/include/linux/mfd/da9150/core.h @@ -15,6 +15,7 @@ #define __DA9150_CORE_H #include <linux/device.h> +#include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/regmap.h> @@ -46,23 +47,39 @@ #define DA9150_IRQ_GPADC 19 #define DA9150_IRQ_WKUP 20 +/* I2C sub-device address */ +#define DA9150_QIF_I2C_ADDR_LSB 0x5 + +struct da9150_fg_pdata { + u32 update_interval; /* msecs */ + u8 warn_soc_lvl; /* % value */ + u8 crit_soc_lvl; /* % value */ +}; + struct da9150_pdata { int irq_base; + struct da9150_fg_pdata *fg_pdata; }; struct da9150 { struct device *dev; struct regmap *regmap; + struct i2c_client *core_qif; + struct regmap_irq_chip_data *regmap_irq_data; int irq; int irq_base; }; -/* Device I/O */ +/* Device I/O - Query Interface for FG and standard register access */ +void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf); +void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf); + u8 da9150_reg_read(struct da9150 *da9150, u16 reg); void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val); void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val); void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf); void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf); + #endif /* __DA9150_CORE_H */ |