power: supply: initial support for TWL6030/32

Add a driver for the charger in the TWL6030/32. For now it does not report
much in sysfs but parameters are set up for USB, charging is enabled with
the specified parameters. It stops charging when full and also restarts
charging.
This prevents ending up in a system setup where you run out of battery
although a charger is plugged in after precharge completed.

Battery voltage behavior was checked via the GPADC.

Signed-off-by: Andreas Kemnade <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sebastian Reichel <[email protected]>

Author: akemnade

drivers/power/supply/Kconfig

@@ -493,6 +493,16 @@ config CHARGER_TWL4030
 	help
 	  Say Y here to enable support for TWL4030 Battery Charge Interface.
 
+config CHARGER_TWL6030
+	tristate "OMAP TWL6030 BCI charger driver"
+	depends on IIO && TWL4030_CORE
+	help
+	  Say Y here to enable support for TWL6030/6032 Battery Charge
+	  Interface.
+
+	  This driver can be build as a module. If so, the module will be
+	  called twl6030_charger.
+
 config CHARGER_LP8727
 	tristate "TI/National Semiconductor LP8727 charger driver"
 	depends on I2C

drivers/power/supply/Makefile

@@ -69,6 +69,7 @@ obj-$(CONFIG_CHARGER_CPCAP)	+= cpcap-charger.o
 obj-$(CONFIG_CHARGER_ISP1704)	+= isp1704_charger.o
 obj-$(CONFIG_CHARGER_MAX8903)	+= max8903_charger.o
 obj-$(CONFIG_CHARGER_TWL4030)	+= twl4030_charger.o
+obj-$(CONFIG_CHARGER_TWL6030)	+= twl6030_charger.o
 obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_LP8788)	+= lp8788-charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o