From: Beomho Seo beomho@samsung.com
This patch adds device driver of max77843 fuel gauge.
The driver support for battery fuel gauge in Maxim Max77843.
It is fuel-gauge systems for lithuum-ion batteries in handled and
portable devices.
Cc: Sebastian Reichel s...@kernel.org
Signed-off-by: Beomho Seo beomho@samsung.com
---
drivers/power/Kconfig|9 ++
drivers/power/Makefile |1 +
drivers/power/max77843_battery.c | 286 ++
3 files changed, 296 insertions(+)
create mode 100644 drivers/power/max77843_battery.c
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 994793d..555e436 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -212,6 +212,15 @@ config BATTERY_MAX17042
with MAX17042. This driver also supports max17047/50 chips which are
improved version of max17042.
+config BATTERY_MAX77843
+ tristate Maxim MAX77843 Fuel Gauge
+ depends on MFD_MAX77843
+ help
+ This adds support for battery fuel gauge in Maxim MAX77843. It is
+ fuel-gauge for a lithium-ion batteries with a single cell and can be
+ found in portable devices. The MAX17040 is configured to operate with
+ a single lithium cell.
+
config BATTERY_Z2
tristate Z2 battery driver
depends on I2C MACH_ZIPIT2
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index ed69cea..59e3945 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o
+obj-$(CONFIG_BATTERY_MAX77843) += max77843_battery.o
obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
diff --git a/drivers/power/max77843_battery.c b/drivers/power/max77843_battery.c
new file mode 100644
index 000..0c59a16
--- /dev/null
+++ b/drivers/power/max77843_battery.c
@@ -0,0 +1,286 @@
+/*
+ * Fuel gauge driver for Maxim MAX77843
+ *
+ * Copyright (C) 2015 Samsung Electronics, Co., Ltd.
+ * Author: Beomho Seo beomho@samsung.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 bythe Free Software Foundation.
+ */
+
+#include linux/module.h
+#include linux/platform_device.h
+#include linux/power_supply.h
+#include linux/mfd/max77843-private.h
+
+struct max77843_battery {
+ struct device *dev;
+ struct max77843 *max77843;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct power_supply psy;
+};
+
+static int max77843_battery_get_capacity(struct max77843_battery *battery)
+{
+ struct regmap *regmap = battery-regmap;
+ int ret, val;
+ unsigned int reg_data;
+
+ ret = regmap_read(regmap, MAX77843_FG_REG_SOCREP, reg_data);
+ if (ret) {
+ dev_err(battery-dev, Failed to read fuelgauge register\n);
+ return ret;
+ }
+
+ val = reg_data 8;
+
+ return val;
+}
+
+static int max77843_battery_get_energy_prop(struct max77843_battery *battery,
+ enum power_supply_property psp)
+{
+ struct regmap *regmap = battery-regmap;
+ unsigned int reg;
+ int ret, val;
+ unsigned int reg_data;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ENERGY_FULL:
+ reg = MAX77843_FG_REG_FULLCAP;
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_NOW:
+ reg = MAX77843_FG_REG_REMCAP_REP;
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_AVG:
+ reg = MAX77843_FG_REG_REMCAP_AV;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_read(regmap, reg, reg_data);
+ if (ret) {
+ dev_err(battery-dev, Failed to read fuelgauge register\n);
+ return ret;
+ }
+
+ val = reg_data;
+
+ return val;
+}
+
+static int max77843_battery_get_current_prop(struct max77843_battery *battery,
+ enum power_supply_property psp)
+{
+ struct regmap *regmap = battery-regmap;
+ unsigned int reg;
+ int ret, val;
+ unsigned int reg_data;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ reg = MAX77843_FG_REG_CURRENT;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ reg = MAX77843_FG_REG_AVG_CURRENT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_read(regmap, reg, reg_data);
+ if (ret) {
+ dev_err(battery-dev, Failed to read fuelgauge register\n);
+ return ret;
+ }
+
+
