regulator: Add WM8350 regulator support

The WM8350 features six DCDC convertors (four buck and two boost), four
LDO voltage regulators and two constant current sinks. This driver adds
support for these through the regulator API.

This driver was written by Liam Girdwood with updates for submission
from Mark Brown.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/mfd/wm8350-core.c

@@ -1218,6 +1218,12 @@ EXPORT_SYMBOL_GPL(wm8350_device_init);
 
 void wm8350_device_exit(struct wm8350 *wm8350)
 {
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(wm8350->pmic.pdev); i++)
+		if (wm8350->pmic.pdev[i] != NULL)
+			platform_device_unregister(wm8350->pmic.pdev[i]);
+
 	free_irq(wm8350->chip_irq, wm8350);
 	flush_work(&wm8350->irq_work);
 	kfree(wm8350->reg_cache);

drivers/regulator/Kconfig

@@ -56,6 +56,14 @@ config REGULATOR_BQ24022
 	  charging select between 100 mA and 500 mA charging current
 	  limit.
 
+config REGULATOR_WM8350
+	tristate "Wolfson Microelectroncis WM8350 AudioPlus PMIC"
+	depends on MFD_WM8350
+	select REGULATOR
+	help
+	  This driver provides support for the voltage and current regulators
+          of the WM8350 AudioPlus PMIC.
+
 config REGULATOR_WM8400
 	tristate "Wolfson Microelectroncis WM8400 AudioPlus PMIC"
 	depends on MFD_WM8400
@@ -63,4 +71,5 @@ config REGULATOR_WM8400
 	help
 	  This driver provides support for the voltage regulators of the
 	  WM8400 AudioPlus PMIC.
+
 endmenu

drivers/regulator/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
 obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
 
 obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
+obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
 obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

include/linux/mfd/wm8350/core.h

@@ -17,6 +17,8 @@
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
 
+#include <linux/mfd/wm8350/pmic.h>
+
 /*
  * Register values.
  */
@@ -570,6 +572,9 @@ struct wm8350 {
 	struct mutex irq_mutex; /* IRQ table mutex */
 	struct wm8350_irq irq[WM8350_NUM_IRQ];
 	int chip_irq;
+
+	/* Client devices */
+	struct wm8350_pmic pmic;
 };
 
 /**

include/linux/mfd/wm8350/pmic.h

@@ -696,4 +696,46 @@
 
 #define NUM_WM8350_REGULATORS			12
 
+struct wm8350;
+struct platform_device;
+struct regulator_init_data;
+
+struct wm8350_pmic {
+	/* ISINK to DCDC mapping */
+	int isink_A_dcdc;
+	int isink_B_dcdc;
+
+	/* hibernate configs */
+	u16 dcdc1_hib_mode;
+	u16 dcdc3_hib_mode;
+	u16 dcdc4_hib_mode;
+	u16 dcdc6_hib_mode;
+
+	/* regulator devices */
+	struct platform_device *pdev[NUM_WM8350_REGULATORS];
+};
+
+int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
+			      struct regulator_init_data *initdata);
+
+/*
+ * Additional DCDC control not supported via regulator API
+ */
+int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
+			 u16 stop, u16 fault);
+int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode,
+			   u16 ilim, u16 ramp, u16 feedback);
+
+/*
+ * Additional LDO control not supported via regulator API
+ */
+int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop);
+
+/*
+ * Additional ISINK control not supported via regulator API
+ */
+int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
+			   u16 trigger, u16 duration, u16 on_ramp,
+			   u16 off_ramp, u16 drive);
+
 #endif