[PATCH v2 4/5] power: bq24190_charger: Add property system-minimum-microvolt
From: Liam Breck <hidden>
Date: 2017-08-07 19:54:44
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
From: Liam Breck <redacted> Set minimum system voltage limit obtained from device property. Cc: Tony Lindgren <tony@atomide.com> Cc: Hans de Goede <redacted> Signed-off-by: Liam Breck <redacted> --- drivers/power/supply/bq24190_charger.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 2ab580bf..f20d2c68 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c@@ -43,6 +43,8 @@ #define BQ24190_REG_POC_CHG_CONFIG_OTG 0x2 #define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1)) #define BQ24190_REG_POC_SYS_MIN_SHIFT 1 +#define BQ24190_REG_POC_SYS_MIN_MIN 3000 +#define BQ24190_REG_POC_SYS_MIN_MAX 3700 #define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0) #define BQ24190_REG_POC_BOOST_LIM_SHIFT 0
@@ -159,6 +161,7 @@ struct bq24190_dev_info { char model_name[I2C_NAME_SIZE]; bool initialized; bool irq_event; + u16 sys_min; struct mutex f_reg_lock; u8 f_reg; u8 ss_reg;
@@ -530,6 +533,16 @@ static int bq24190_set_config(struct bq24190_dev_info *bdi) if (ret < 0) return ret; + if (bdi->sys_min) { + v = bdi->sys_min / 100 - 30; // manual section 9.5.1.2, table 9 + ret = bq24190_write_mask(bdi, BQ24190_REG_POC, + BQ24190_REG_POC_SYS_MIN_MASK, + BQ24190_REG_POC_SYS_MIN_SHIFT, + v); + if (ret < 0) + return ret; + } + return 0; }
@@ -1471,11 +1484,21 @@ static int bq24190_hw_init(struct bq24190_dev_info *bdi) static int bq24190_get_config(struct bq24190_dev_info *bdi) { #ifdef CONFIG_OF + const char * const s = "ti,system-minimum-microvolt"; int v; if (!bdi->dev->of_node) return -EINVAL; + if (device_property_read_u32(bdi->dev, s, &v) == 0) { + v /= 1000; + if (v >= BQ24190_REG_POC_SYS_MIN_MIN + && v <= BQ24190_REG_POC_SYS_MIN_MAX) + bdi->sys_min = v; + else + dev_warn(bdi->dev, "invalid value for %s: %u\n", s, v); + } + #endif return 0; }
--
2.13.2