diff options
| -rw-r--r-- | drivers/mfd/sec-core.c | 26 | ||||
| -rw-r--r-- | include/linux/mfd/samsung/core.h | 2 | ||||
| -rw-r--r-- | include/linux/mfd/samsung/s2mps13.h | 1 |
3 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c index 589e5efc2d7f..2626fc0b5b8c 100644 --- a/drivers/mfd/sec-core.c +++ b/drivers/mfd/sec-core.c @@ -262,6 +262,29 @@ static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic) dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val); } +static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic) +{ + int err; + + if (sec_pmic->device_type != S2MPS13X) + return; + + if (sec_pmic->pdata->disable_wrstbi) { + /* + * If WRSTBI pin is pulled down this feature must be disabled + * because each Suspend to RAM will trigger buck voltage reset + * to default values. + */ + err = regmap_update_bits(sec_pmic->regmap_pmic, + S2MPS13_REG_WRSTBI, + S2MPS13_REG_WRSTBI_MASK, 0x0); + if (err) + dev_warn(sec_pmic->dev, + "Cannot initialize WRSTBI config: %d\n", + err); + } +} + #ifdef CONFIG_OF /* * Only the common platform data elements for s5m8767 are parsed here from the @@ -289,6 +312,8 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( pd->manual_poweroff = of_property_read_bool(dev->of_node, "samsung,s2mps11-acokb-ground"); + pd->disable_wrstbi = of_property_read_bool(dev->of_node, + "samsung,s2mps11-wrstbi-ground"); return pd; } #else @@ -434,6 +459,7 @@ static int sec_pmic_probe(struct i2c_client *i2c, goto err_mfd; device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); + sec_pmic_configure(sec_pmic); sec_pmic_dump_rev(sec_pmic); return ret; diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h index aa78957e092f..a06098639399 100644 --- a/include/linux/mfd/samsung/core.h +++ b/include/linux/mfd/samsung/core.h @@ -134,6 +134,8 @@ struct sec_platform_data { int buck4_init; /* Whether or not manually set PWRHOLD to low during shutdown. */ bool manual_poweroff; + /* Disable the WRSTBI (buck voltage warm reset) when probing? */ + bool disable_wrstbi; }; /** diff --git a/include/linux/mfd/samsung/s2mps13.h b/include/linux/mfd/samsung/s2mps13.h index b1fd675fa36f..239e977ba45d 100644 --- a/include/linux/mfd/samsung/s2mps13.h +++ b/include/linux/mfd/samsung/s2mps13.h @@ -184,5 +184,6 @@ enum s2mps13_regulators { * Let's assume that default value will be set. */ #define S2MPS13_BUCK_RAMP_DELAY 12500 +#define S2MPS13_REG_WRSTBI_MASK BIT(5) #endif /* __LINUX_MFD_S2MPS13_H */ |