Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (26 commits)
  mfd: Fix warning in WM8350
  mfd: Add placeholders for WM8350 client devices
  da903x: add regulator support for DA9030/DA9034
  mfd: Add WM8350 subdevice registration helper
  regulator: Add WM8350 regulator support
  mfd: Add WM8350 interrupt support
  mfd: Add initialisation callback for WM8350
  mfd: Add GPIO pin configuration support for WM8350
  mfd: Add I2C control support for WM8350
  mfd: Core support for the WM8350 AudioPlus PMIC
  mfd: Add WM8350 watchdog register definitions
  mfd: Add WM8350 RTC register definitions
  mfd: Add WM8350 comparator register definitions
  mfd: Add WM8350 PMU register definitions
  mfd: Add WM8350 PMIC register definitions
  mfd: Add WM8350 GPIO register definitions
  mfd: Add WM8350 audio register definitions
  regulator: Export regulator name via sysfs
  regulator: Add WM8400 regulator support
  mfd: Core support for the WM8400 AudioPlus HiFi CODEC and PMU
  ...

Documentation/ABI/testing/sysfs-class-regulator

 What:		/sys/class/regulator/.../state
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		state. This holds the regulator output state.
@@ -27,7 +27,7 @@ Description:
 What:		/sys/class/regulator/.../type
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		type. This holds the regulator type.
@@ -51,7 +51,7 @@ Description:
 What:		/sys/class/regulator/.../microvolts
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		microvolts. This holds the regulator output voltage setting
@@ -65,7 +65,7 @@ Description:
 What:		/sys/class/regulator/.../microamps
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		microamps. This holds the regulator output current limit
@@ -79,7 +79,7 @@ Description:
 What:		/sys/class/regulator/.../opmode
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		opmode. This holds the regulator operating mode setting.
@@ -102,7 +102,7 @@ Description:
 What:		/sys/class/regulator/.../min_microvolts
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		min_microvolts. This holds the minimum safe working regulator
@@ -116,7 +116,7 @@ Description:
 What:		/sys/class/regulator/.../max_microvolts
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		max_microvolts. This holds the maximum safe working regulator
@@ -130,7 +130,7 @@ Description:
 What:		/sys/class/regulator/.../min_microamps
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		min_microamps. This holds the minimum safe working regulator
@@ -145,7 +145,7 @@ Description:
 What:		/sys/class/regulator/.../max_microamps
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		max_microamps. This holds the maximum safe working regulator
@@ -157,10 +157,23 @@ Description:
 		platform code.
 
 
+What:		/sys/class/regulator/.../name
+Date:		October 2008
+KernelVersion:	2.6.28
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
+Description:
+		Each regulator directory will contain a field called
+		name. This holds a string identifying the regulator for
+		display purposes.
+
+		NOTE: this will be empty if no suitable name is provided
+		by platform or regulator drivers.
+
+
 What:		/sys/class/regulator/.../num_users
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		num_users. This holds the number of consumer devices that
@@ -170,7 +183,7 @@ Description:
 What:		/sys/class/regulator/.../requested_microamps
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		requested_microamps. This holds the total requested load
@@ -181,7 +194,7 @@ Description:
 What:		/sys/class/regulator/.../parent
 Date:		April 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Some regulator directories will contain a link called parent.
 		This points to the parent or supply regulator if one exists.
@@ -189,7 +202,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_mem_microvolts
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_mem_microvolts. This holds the regulator output
@@ -203,7 +216,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_disk_microvolts
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_disk_microvolts. This holds the regulator output
@@ -217,7 +230,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_standby_microvolts
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_standby_microvolts. This holds the regulator output
@@ -231,7 +244,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_mem_mode
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_mem_mode. This holds the regulator operating mode
@@ -245,7 +258,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_disk_mode
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_disk_mode. This holds the regulator operating mode
@@ -258,7 +271,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_standby_mode
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_standby_mode. This holds the regulator operating mode
@@ -272,7 +285,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_mem_state
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_mem_state. This holds the regulator operating state
@@ -287,7 +300,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_disk_state
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_disk_state. This holds the regulator operating state
@@ -302,7 +315,7 @@ Description:
 What:		/sys/class/regulator/.../suspend_standby_state
 Date:		May 2008
 KernelVersion:	2.6.26
-Contact:	Liam Girdwood <lg@opensource.wolfsonmicro.com>
+Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Each regulator directory will contain a field called
 		suspend_standby_state. This holds the regulator operating

Documentation/power/regulator/machine.txt

@@ -2,17 +2,8 @@ Regulator Machine Driver Interface
 ===================================
 
 The regulator machine driver interface is intended for board/machine specific
-initialisation code to configure the regulator subsystem. Typical things that
-machine drivers would do are :-
+initialisation code to configure the regulator subsystem.
 
- 1. Regulator -> Device mapping.
- 2. Regulator supply configuration.
- 3. Power Domain constraint setting.
-
-
-
-1. Regulator -> device mapping
-==============================
 Consider the following machine :-
 
   Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
@@ -21,81 +12,82 @@ Consider the following machine :-
 
 The drivers for consumers A & B must be mapped to the correct regulator in
 order to control their power supply. This mapping can be achieved in machine
-initialisation code by calling :-
+initialisation code by creating a struct regulator_consumer_supply for
+each regulator.
+
+struct regulator_consumer_supply {
+	struct device *dev;	/* consumer */
+	const char *supply;	/* consumer supply - e.g. "vcc" */
+};
 
-int regulator_set_device_supply(const char *regulator, struct device *dev,
-				const char *supply);
+e.g. for the machine above
 
-and is shown with the following code :-
+static struct regulator_consumer_supply regulator1_consumers[] = {
+{
+	.dev	= &platform_consumerB_device.dev,
+	.supply	= "Vcc",
+},};
 
-regulator_set_device_supply("Regulator-1", devB, "Vcc");
-regulator_set_device_supply("Regulator-2", devA, "Vcc");
+static struct regulator_consumer_supply regulator2_consumers[] = {
+{
+	.dev	= &platform_consumerA_device.dev,
+	.supply	= "Vcc",
+},};
 
 This maps Regulator-1 to the 'Vcc' supply for Consumer B and maps Regulator-2
 to the 'Vcc' supply for Consumer A.
 
-
-2. Regulator supply configuration.
-==================================
-Consider the following machine (again) :-
-
-  Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
-               |
-               +-> [Consumer B @ 3.3V]
+Constraints can now be registered by defining a struct regulator_init_data
+for each regulator power domain. This structure also maps the consumers
+to their supply regulator :-
+
+static struct regulator_init_data regulator1_data = {
+	.constraints = {
+		.min_uV = 3300000,
+		.max_uV = 3300000,
+		.valid_modes_mask = REGULATOR_MODE_NORMAL,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(regulator1_consumers),
+	.consumer_supplies = regulator1_consumers,
+};
 
 Regulator-1 supplies power to Regulator-2. This relationship must be registered
 with the core so that Regulator-1 is also enabled when Consumer A enables it's
-supply (Regulator-2).
-
-This relationship can be register with the core via :-
-
-int regulator_set_supply(const char *regulator, const char *regulator_supply);
-
-In this example we would use the following code :-
-
-regulator_set_supply("Regulator-2", "Regulator-1");
-
-Relationships can be queried by calling :-
-
-const char *regulator_get_supply(const char *regulator);
-
-
-3. Power Domain constraint setting.
-===================================
-Each power domain within a system has physical constraints on voltage and
-current. This must be defined in software so that the power domain is always
-operated within specifications.
-
-Consider the following machine (again) :-
-
-  Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
-               |
-               +-> [Consumer B @ 3.3V]
-
-This gives us two regulators and two power domains:
-
-                   Domain 1: Regulator-2, Consumer B.
-                   Domain 2: Consumer A.
-
-Constraints can be registered by calling :-
-
-int regulator_set_platform_constraints(const char *regulator,
-	struct regulation_constraints *constraints);
-
-The example is defined as follows :-
-
-struct regulation_constraints domain_1 = {
-	.min_uV = 3300000,
-	.max_uV = 3300000,
-	.valid_modes_mask = REGULATOR_MODE_NORMAL,
+supply (Regulator-2). The supply regulator is set by the supply_regulator_dev
+field below:-
+
+static struct regulator_init_data regulator2_data = {
+	.supply_regulator_dev = &platform_regulator1_device.dev,
+	.constraints = {
+		.min_uV = 1800000,
+		.max_uV = 2000000,
+		.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
+		.valid_modes_mask = REGULATOR_MODE_NORMAL,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(regulator2_consumers),
+	.consumer_supplies = regulator2_consumers,
 };
 
-struct regulation_constraints domain_2 = {
-	.min_uV = 1800000,
-	.max_uV = 2000000,
-	.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
-	.valid_modes_mask = REGULATOR_MODE_NORMAL,
+Finally the regulator devices must be registered in the usual manner.
+
+static struct platform_device regulator_devices[] = {
+{
+	.name = "regulator",
+	.id = DCDC_1,
+	.dev = {
+		.platform_data = &regulator1_data,
+	},
+},
+{
+	.name = "regulator",
+	.id = DCDC_2,
+	.dev = {
+		.platform_data = &regulator2_data,
+	},
+},
 };
+/* register regulator 1 device */
+platform_device_register(&wm8350_regulator_devices[0]);
 
-regulator_set_platform_constraints("Regulator-1", &domain_1);
-regulator_set_platform_constraints("Regulator-2", &domain_2);
+/* register regulator 2 device */
+platform_device_register(&wm8350_regulator_devices[1]);

Documentation/power/regulator/regulator.txt

@@ -10,11 +10,11 @@ Registration
 
 Drivers can register a regulator by calling :-
 
-struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
-					  void *reg_data);
+struct regulator_dev *regulator_register(struct device *dev,
+	struct regulator_desc *regulator_desc);
 
-This will register the regulators capabilities and operations the regulator
-core. The core does not touch reg_data (private to regulator driver).
+This will register the regulators capabilities and operations to the regulator
+core.
 
 Regulators can be unregistered by calling :-
 

MAINTAINERS

@@ -4520,10 +4520,11 @@ S:	Maintained
 
 VOLTAGE AND CURRENT REGULATOR FRAMEWORK
 P:	Liam Girdwood
-M:	lg@opensource.wolfsonmicro.com
+M:	lrg@slimlogic.co.uk
 P:	Mark Brown
 M:	broonie@opensource.wolfsonmicro.com
 W:	http://opensource.wolfsonmicro.com/node/15
+W:	http://www.slimlogic.co.uk/?page_id=5
 T:	git kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6.git
 S:	Supported
 

drivers/mfd/Kconfig

@@ -87,6 +87,44 @@ config MFD_TC6393XB
 	help
 	  Support for Toshiba Mobile IO Controller TC6393XB
 
+config MFD_WM8400
+	tristate "Support Wolfson Microelectronics WM8400"
+	help
+	  Support for the Wolfson Microelecronics WM8400 PMIC and audio
+	  CODEC.  This driver adds provides common support for accessing
+	  the device, additional drivers must be enabled in order to use
+	  the functionality of the device.
+
+config MFD_WM8350
+	tristate
+
+config MFD_WM8350_CONFIG_MODE_0
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8350_CONFIG_MODE_1
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8350_CONFIG_MODE_2
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8350_CONFIG_MODE_3
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8350_I2C
+	tristate "Support Wolfson Microelectronics WM8350 with I2C"
+	select MFD_WM8350
+	depends on I2C
+	help
+	  The WM8350 is an integrated audio and power management
+	  subsystem with watchdog and RTC functionality for embedded
+	  systems.  This option enables core support for the WM8350 with
+	  I2C as the control interface.  Additional options must be
+	  selected to enable support for the functionality of the chip.
+
 endmenu
 
 menu "Multimedia Capabilities Port drivers"

drivers/mfd/Makefile

@@ -12,6 +12,11 @@ obj-$(CONFIG_MFD_T7L66XB)	+= t7l66xb.o
 obj-$(CONFIG_MFD_TC6387XB)	+= tc6387xb.o
 obj-$(CONFIG_MFD_TC6393XB)	+= tc6393xb.o
 
+obj-$(CONFIG_MFD_WM8400)	+= wm8400-core.o
+wm8350-objs			:= wm8350-core.o wm8350-regmap.o wm8350-gpio.o
+obj-$(CONFIG_MFD_WM8350)	+= wm8350.o
+obj-$(CONFIG_MFD_WM8350_I2C)	+= wm8350-i2c.o
+
 obj-$(CONFIG_MFD_CORE)		+= mfd-core.o
 
 obj-$(CONFIG_MCP)		+= mcp-core.o

drivers/mfd/wm8350-gpio.c

+/*
+ * wm8350-core.c  --  Device access for Wolfson WM8350
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+
+#include <linux/mfd/wm8350/core.h>
+#include <linux/mfd/wm8350/gpio.h>
+#include <linux/mfd/wm8350/pmic.h>
+
+static int gpio_set_dir(struct wm8350 *wm8350, int gpio, int dir)
+{
+	int ret;
+
+	wm8350_reg_unlock(wm8350);
+	if (dir == WM8350_GPIO_DIR_OUT)
+		ret = wm8350_clear_bits(wm8350,
+					WM8350_GPIO_CONFIGURATION_I_O,
+					1 << gpio);
+	else
+		ret = wm8350_set_bits(wm8350,
+				      WM8350_GPIO_CONFIGURATION_I_O,
+				      1 << gpio);
+	wm8350_reg_lock(wm8350);
+	return ret;
+}
+
+static int gpio_set_debounce(struct wm8350 *wm8350, int gpio, int db)
+{
+	if (db == WM8350_GPIO_DEBOUNCE_ON)
+		return wm8350_set_bits(wm8350, WM8350_GPIO_DEBOUNCE,
+				       1 << gpio);
+	else
+		return wm8350_clear_bits(wm8350,
+					 WM8350_GPIO_DEBOUNCE, 1 << gpio);
+}
+
+static int gpio_set_func(struct wm8350 *wm8350, int gpio, int func)
+{
+	u16 reg;
+
+	wm8350_reg_unlock(wm8350);
+	switch (gpio) {
+	case 0:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
+		    & ~WM8350_GP0_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
+				 reg | ((func & 0xf) << 0));
+		break;
+	case 1:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
+		    & ~WM8350_GP1_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
+				 reg | ((func & 0xf) << 4));
+		break;
+	case 2:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
+		    & ~WM8350_GP2_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
+				 reg | ((func & 0xf) << 8));
+		break;
+	case 3:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
+		    & ~WM8350_GP3_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
+				 reg | ((func & 0xf) << 12));
+		break;
+	case 4:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
+		    & ~WM8350_GP4_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
+				 reg | ((func & 0xf) << 0));
+		break;
+	case 5:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
+		    & ~WM8350_GP5_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
+				 reg | ((func & 0xf) << 4));
+		break;
+	case 6:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
+		    & ~WM8350_GP6_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
+				 reg | ((func & 0xf) << 8));
+		break;
+	case 7:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
+		    & ~WM8350_GP7_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
+				 reg | ((func & 0xf) << 12));
+		break;
+	case 8:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
+		    & ~WM8350_GP8_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
+				 reg | ((func & 0xf) << 0));
+		break;
+	case 9:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
+		    & ~WM8350_GP9_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
+				 reg | ((func & 0xf) << 4));
+		break;
+	case 10:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
+		    & ~WM8350_GP10_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
+				 reg | ((func & 0xf) << 8));
+		break;
+	case 11:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
+		    & ~WM8350_GP11_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
+				 reg | ((func & 0xf) << 12));
+		break;
+	case 12:
+		reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_4)
+		    & ~WM8350_GP12_FN_MASK;
+		wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_4,
+				 reg | ((func & 0xf) << 0));
+		break;
+	default:
+		wm8350_reg_lock(wm8350);
+		return -EINVAL;
+	}
+
+	wm8350_reg_lock(wm8350);
+	return 0;
+}
+
+static int gpio_set_pull_up(struct wm8350 *wm8350, int gpio, int up)
+{
+	if (up)
+		return wm8350_set_bits(wm8350,
+				       WM8350_GPIO_PIN_PULL_UP_CONTROL,
+				       1 << gpio);
+	else
+		return wm8350_clear_bits(wm8350,
+					 WM8350_GPIO_PIN_PULL_UP_CONTROL,
+					 1 << gpio);
+}
+
+static int gpio_set_pull_down(struct wm8350 *wm8350, int gpio, int down)
+{
+	if (down)
+		return wm8350_set_bits(wm8350,
+				       WM8350_GPIO_PULL_DOWN_CONTROL,
+				       1 << gpio);
+	else
+		return wm8350_clear_bits(wm8350,
+					 WM8350_GPIO_PULL_DOWN_CONTROL,
+					 1 << gpio);
+}
+
+static int gpio_set_polarity(struct wm8350 *wm8350, int gpio, int pol)
+{
+	if (pol == WM8350_GPIO_ACTIVE_HIGH)
+		return wm8350_set_bits(wm8350,
+				       WM8350_GPIO_PIN_POLARITY_TYPE,
+				       1 << gpio);
+	else
+		return wm8350_clear_bits(wm8350,
+					 WM8350_GPIO_PIN_POLARITY_TYPE,
+					 1 << gpio);
+}
+
+static int gpio_set_invert(struct wm8350 *wm8350, int gpio, int invert)
+{
+	if (invert == WM8350_GPIO_INVERT_ON)
+		return wm8350_set_bits(wm8350, WM8350_GPIO_INT_MODE, 1 << gpio);
+	else
+		return wm8350_clear_bits(wm8350,
+					 WM8350_GPIO_INT_MODE, 1 << gpio);
+}
+
+int wm8350_gpio_config(struct wm8350 *wm8350, int gpio, int dir, int func,
+		       int pol, int pull, int invert, int debounce)
+{
+	/* make sure we never pull up and down at the same time */
+	if (pull == WM8350_GPIO_PULL_NONE) {
+		if (gpio_set_pull_up(wm8350, gpio, 0))
+			goto err;
+		if (gpio_set_pull_down(wm8350, gpio, 0))
+			goto err;
+	} else if (pull == WM8350_GPIO_PULL_UP) {
+		if (gpio_set_pull_down(wm8350, gpio, 0))
+			goto err;
+		if (gpio_set_pull_up(wm8350, gpio, 1))
+			goto err;
+	} else if (pull == WM8350_GPIO_PULL_DOWN) {
+		if (gpio_set_pull_up(wm8350, gpio, 0))
+			goto err;
+		if (gpio_set_pull_down(wm8350, gpio, 1))
+			goto err;
+	}
+
+	if (gpio_set_invert(wm8350, gpio, invert))
+		goto err;
+	if (gpio_set_polarity(wm8350, gpio, pol))
+		goto err;
+	if (gpio_set_debounce(wm8350, gpio, debounce))
+		goto err;
+	if (gpio_set_dir(wm8350, gpio, dir))
+		goto err;
+	return gpio_set_func(wm8350, gpio, func);
+
+err:
+	return -EIO;
+}
+EXPORT_SYMBOL_GPL(wm8350_gpio_config);

drivers/mfd/wm8350-i2c.c

+/*
+ * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
+ *
+ * This driver defines and configures the WM8350 for the Freescale i.MX32ADS.
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood
+ *         linux@wolfsonmicro.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/wm8350/core.h>
+
+static int wm8350_i2c_read_device(struct wm8350 *wm8350, char reg,
+				  int bytes, void *dest)
+{
+	int ret;
+
+	ret = i2c_master_send(wm8350->i2c_client, &reg, 1);
+	if (ret < 0)
+		return ret;
+	return i2c_master_recv(wm8350->i2c_client, dest, bytes);
+}
+
+static int wm8350_i2c_write_device(struct wm8350 *wm8350, char reg,
+				   int bytes, void *src)
+{
+	/* we add 1 byte for device register */
+	u8 msg[(WM8350_MAX_REGISTER << 1) + 1];
+
+	if (bytes > ((WM8350_MAX_REGISTER << 1) + 1))
+		return -EINVAL;
+
+	msg[0] = reg;
+	memcpy(&msg[1], src, bytes);
+	return i2c_master_send(wm8350->i2c_client, msg, bytes + 1);
+}
+
+static int wm8350_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct wm8350 *wm8350;
+	int ret = 0;
+
+	wm8350 = kzalloc(sizeof(struct wm8350), GFP_KERNEL);
+	if (wm8350 == NULL) {
+		kfree(i2c);
+		return -ENOMEM;
+	}
+
+	i2c_set_clientdata(i2c, wm8350);
+	wm8350->dev = &i2c->dev;
+	wm8350->i2c_client = i2c;
+	wm8350->read_dev = wm8350_i2c_read_device;
+	wm8350->write_dev = wm8350_i2c_write_device;
+
+	ret = wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
+	if (ret < 0)
+		goto err;
+
+	return ret;
+
+err:
+	kfree(wm8350);
+	return ret;
+}
+
+static int wm8350_i2c_remove(struct i2c_client *i2c)
+{
+	struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
+
+	wm8350_device_exit(wm8350);
+	kfree(wm8350);
+
+	return 0;
+}
+
+static const struct i2c_device_id wm8350_i2c_id[] = {
+       { "wm8350", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
+
+
+static struct i2c_driver wm8350_i2c_driver = {
+	.driver = {
+		   .name = "wm8350",
+		   .owner = THIS_MODULE,
+	},
+	.probe = wm8350_i2c_probe,
+	.remove = wm8350_i2c_remove,
+	.id_table = wm8350_i2c_id,
+};
+
+static int __init wm8350_i2c_init(void)
+{
+	return i2c_add_driver(&wm8350_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(wm8350_i2c_init);
+
+static void __exit wm8350_i2c_exit(void)
+{
+	i2c_del_driver(&wm8350_i2c_driver);
+}
+module_exit(wm8350_i2c_exit);
+
+MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
+MODULE_LICENSE("GPL");

drivers/mfd/wm8400-core.c

+/*
+ * Core driver for WM8400.
+ *
+ * Copyright 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/bug.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mfd/wm8400-private.h>
+#include <linux/mfd/wm8400-audio.h>
+
+static struct {
+	u16  readable;    /* Mask of readable bits */
+	u16  writable;    /* Mask of writable bits */
+	u16  vol;         /* Mask of volatile bits */
+	int  is_codec;    /* Register controlled by codec reset */
+	u16  default_val; /* Value on reset */
+} reg_data[] = {
+	{ 0xFFFF, 0xFFFF, 0x0000, 0, 0x6172 }, /* R0 */
+	{ 0x7000, 0x0000, 0x8000, 0, 0x0000 }, /* R1 */
+	{ 0xFF17, 0xFF17, 0x0000, 0, 0x0000 }, /* R2 */
+	{ 0xEBF3, 0xEBF3, 0x0000, 1, 0x6000 }, /* R3 */
+	{ 0x3CF3, 0x3CF3, 0x0000, 1, 0x0000 }, /* R4  */
+	{ 0xF1F8, 0xF1F8, 0x0000, 1, 0x4050 }, /* R5  */
+	{ 0xFC1F, 0xFC1F, 0x0000, 1, 0x4000 }, /* R6  */
+	{ 0xDFDE, 0xDFDE, 0x0000, 1, 0x01C8 }, /* R7  */
+	{ 0xFCFC, 0xFCFC, 0x0000, 1, 0x0000 }, /* R8  */
+	{ 0xEFFF, 0xEFFF, 0x0000, 1, 0x0040 }, /* R9  */
+	{ 0xEFFF, 0xEFFF, 0x0000, 1, 0x0040 }, /* R10 */
+	{ 0x27F7, 0x27F7, 0x0000, 1, 0x0004 }, /* R11 */
+	{ 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R12 */
+	{ 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R13 */
+	{ 0x1FEF, 0x1FEF, 0x0000, 1, 0x0000 }, /* R14 */
+	{ 0x0163, 0x0163, 0x0000, 1, 0x0100 }, /* R15 */
+	{ 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R16 */
+	{ 0x01FF, 0x01FF, 0x0000, 1, 0x00C0 }, /* R17 */
+	{ 0x1FFF, 0x0FFF, 0x0000, 1, 0x0000 }, /* R18 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 1, 0x1000 }, /* R19 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 1, 0x1010 }, /* R20 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 1, 0x1010 }, /* R21 */
+	{ 0x0FDD, 0x0FDD, 0x0000, 1, 0x8000 }, /* R22 */
+	{ 0x1FFF, 0x1FFF, 0x0000, 1, 0x0800 }, /* R23 */
+	{ 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R24 */
+	{ 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R25 */
+	{ 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R26 */
+	{ 0x0000, 0x01DF, 0x0000, 1, 0x008B }, /* R27 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R28 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R29 */
+	{ 0x0000, 0x0077, 0x0000, 1, 0x0066 }, /* R30 */
+	{ 0x0000, 0x0033, 0x0000, 1, 0x0022 }, /* R31 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0079 }, /* R32 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0079 }, /* R33 */
+	{ 0x0000, 0x0003, 0x0000, 1, 0x0003 }, /* R34 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0003 }, /* R35 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R36 */
+	{ 0x0000, 0x003F, 0x0000, 1, 0x0100 }, /* R37 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R38 */
+	{ 0x0000, 0x000F, 0x0000, 0, 0x0000 }, /* R39 */
+	{ 0x0000, 0x00FF, 0x0000, 1, 0x0000 }, /* R40 */
+	{ 0x0000, 0x01B7, 0x0000, 1, 0x0000 }, /* R41 */
+	{ 0x0000, 0x01B7, 0x0000, 1, 0x0000 }, /* R42 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R43 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R44 */
+	{ 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R45 */
+	{ 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R46 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R47 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R48 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R49 */
+	{ 0x0000, 0x01FF, 0x0000, 1, 0x0000 }, /* R50 */
+	{ 0x0000, 0x01B3, 0x0000, 1, 0x0180 }, /* R51 */
+	{ 0x0000, 0x0077, 0x0000, 1, 0x0000 }, /* R52 */
+	{ 0x0000, 0x0077, 0x0000, 1, 0x0000 }, /* R53 */
+	{ 0x0000, 0x00FF, 0x0000, 1, 0x0000 }, /* R54 */
+	{ 0x0000, 0x0001, 0x0000, 1, 0x0000 }, /* R55 */
+	{ 0x0000, 0x003F, 0x0000, 1, 0x0000 }, /* R56 */
+	{ 0x0000, 0x004F, 0x0000, 1, 0x0000 }, /* R57 */
+	{ 0x0000, 0x00FD, 0x0000, 1, 0x0000 }, /* R58 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R59 */
+	{ 0x1FFF, 0x1FFF, 0x0000, 1, 0x0000 }, /* R60 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 1, 0x0000 }, /* R61 */
+	{ 0x03FF, 0x03FF, 0x0000, 1, 0x0000 }, /* R62 */
+	{ 0x007F, 0x007F, 0x0000, 1, 0x0000 }, /* R63 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R64 */
+	{ 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R65 */
+	{ 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R66 */
+	{ 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R67 */
+	{ 0xDFFF, 0xDFFF, 0x0000, 0, 0x0000 }, /* R68 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R69 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 0, 0x4400 }, /* R70 */
+	{ 0x23FF, 0x23FF, 0x0000, 0, 0x0000 }, /* R71 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 0, 0x4400 }, /* R72 */
+	{ 0x23FF, 0x23FF, 0x0000, 0, 0x0000 }, /* R73 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R74 */
+	{ 0x000E, 0x000E, 0x0000, 0, 0x0008 }, /* R75 */
+	{ 0xE00F, 0xE00F, 0x0000, 0, 0x0000 }, /* R76 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R77 */
+	{ 0x03C0, 0x03C0, 0x0000, 0, 0x02C0 }, /* R78 */
+	{ 0xFFFF, 0x0000, 0xffff, 0, 0x0000 }, /* R79 */
+	{ 0xFFFF, 0xFFFF, 0x0000, 0, 0x0000 }, /* R80 */
+	{ 0xFFFF, 0x0000, 0xffff, 0, 0x0000 }, /* R81 */
+	{ 0x2BFF, 0x0000, 0xffff, 0, 0x0000 }, /* R82 */
+	{ 0x0000, 0x0000, 0x0000, 0, 0x0000 }, /* R83 */
+	{ 0x80FF, 0x80FF, 0x0000, 0, 0x00ff }, /* R84 */
+};
+
+static int wm8400_read(struct wm8400 *wm8400, u8 reg, int num_regs, u16 *dest)
+{
+	int i, ret = 0;
+
+	BUG_ON(reg + num_regs - 1 > ARRAY_SIZE(wm8400->reg_cache));
+
+	/* If there are any volatile reads then read back the entire block */
+	for (i = reg; i < reg + num_regs; i++)
+		if (reg_data[i].vol) {
+			ret = wm8400->read_dev(wm8400->io_data, reg,
+					       num_regs, dest);
+			if (ret != 0)
+				return ret;
+			for (i = 0; i < num_regs; i++)
+				dest[i] = be16_to_cpu(dest[i]);
+
+			return 0;
+		}
+
+	/* Otherwise use the cache */
+	memcpy(dest, &wm8400->reg_cache[reg], num_regs * sizeof(u16));
+
+	return 0;
+}
+
+static int wm8400_write(struct wm8400 *wm8400, u8 reg, int num_regs,
+			u16 *src)
+{
+	int ret, i;
+
+	BUG_ON(reg + num_regs - 1 > ARRAY_SIZE(wm8400->reg_cache));
+
+	for (i = 0; i < num_regs; i++) {
+		BUG_ON(!reg_data[reg + i].writable);
+		wm8400->reg_cache[reg + i] = src[i];
+		src[i] = cpu_to_be16(src[i]);
+	}
+
+	/* Do the actual I/O */
+	ret = wm8400->write_dev(wm8400->io_data, reg, num_regs, src);
+	if (ret != 0)
+		return -EIO;
+
+	return 0;
+}
+
+/**
+ * wm8400_reg_read - Single register read
+ *
+ * @wm8400: Pointer to wm8400 control structure
+ * @reg:    Register to read
+ *
+ * @return  Read value
+ */
+u16 wm8400_reg_read(struct wm8400 *wm8400, u8 reg)
+{
+	u16 val;
+
+	mutex_lock(&wm8400->io_lock);
+
+	wm8400_read(wm8400, reg, 1, &val);
+
+	mutex_unlock(&wm8400->io_lock);
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(wm8400_reg_read);
+
+int wm8400_block_read(struct wm8400 *wm8400, u8 reg, int count, u16 *data)
+{
+	int ret;
+
+	mutex_lock(&wm8400->io_lock);
+
+	ret = wm8400_read(wm8400, reg, count, data);
+
+	mutex_unlock(&wm8400->io_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(wm8400_block_read);
+
+/**
+ * wm8400_set_bits - Bitmask write
+ *
+ * @wm8400: Pointer to wm8400 control structure
+ * @reg:    Register to access
+ * @mask:   Mask of bits to change
+ * @val:    Value to set for masked bits
+ */
+int wm8400_set_bits(struct wm8400 *wm8400, u8 reg, u16 mask, u16 val)
+{
+	u16 tmp;
+	int ret;
+
+	mutex_lock(&wm8400->io_lock);
+
+	ret = wm8400_read(wm8400, reg, 1, &tmp);
+	tmp = (tmp & ~mask) | val;
+	if (ret == 0)
+		ret = wm8400_write(wm8400, reg, 1, &tmp);
+
+	mutex_unlock(&wm8400->io_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(wm8400_set_bits);
+
+/**
+ * wm8400_reset_codec_reg_cache - Reset cached codec registers to
+ * their default values.
+ */
+void wm8400_reset_codec_reg_cache(struct wm8400 *wm8400)
+{
+	int i;
+
+	mutex_lock(&wm8400->io_lock);
+
+	/* Reset all codec registers to their initial value */
+	for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
+		if (reg_data[i].is_codec)
+			wm8400->reg_cache[i] = reg_data[i].default_val;
+
+	mutex_unlock(&wm8400->io_lock);
+}
+EXPORT_SYMBOL_GPL(wm8400_reset_codec_reg_cache);
+
+/*
+ * wm8400_init - Generic initialisation
+ *
+ * The WM8400 can be configured as either an I2C or SPI device.  Probe
+ * functions for each bus set up the accessors then call into this to
+ * set up the device itself.
+ */
+static int wm8400_init(struct wm8400 *wm8400,
+		       struct wm8400_platform_data *pdata)
+{
+	u16 reg;
+	int ret, i;
+
+	mutex_init(&wm8400->io_lock);
+
+	wm8400->dev->driver_data = wm8400;
+
+	/* Check that this is actually a WM8400 */
+	ret = wm8400->read_dev(wm8400->io_data, WM8400_RESET_ID, 1, &reg);
+	if (ret != 0) {
+		dev_err(wm8400->dev, "Chip ID register read failed\n");
+		return -EIO;
+	}
+	if (be16_to_cpu(reg) != reg_data[WM8400_RESET_ID].default_val) {
+		dev_err(wm8400->dev, "Device is not a WM8400, ID is %x\n",
+			be16_to_cpu(reg));
+		return -ENODEV;
+	}
+
+	/* We don't know what state the hardware is in and since this
+	 * is a PMIC we can't reset it safely so initialise the register
+	 * cache from the hardware.
+	 */
+	ret = wm8400->read_dev(wm8400->io_data, 0,
+			       ARRAY_SIZE(wm8400->reg_cache),
+			       wm8400->reg_cache);
+	if (ret != 0) {
+		dev_err(wm8400->dev, "Register cache read failed\n");
+		return -EIO;
+	}
+	for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
+		wm8400->reg_cache[i] = be16_to_cpu(wm8400->reg_cache[i]);
+
+	/* If the codec is in reset use hard coded values */
+	if (!(wm8400->reg_cache[WM8400_POWER_MANAGEMENT_1] & WM8400_CODEC_ENA))
+		for (i = 0; i < ARRAY_SIZE(wm8400->reg_cache); i++)
+			if (reg_data[i].is_codec)
+				wm8400->reg_cache[i] = reg_data[i].default_val;
+
+	ret = wm8400_read(wm8400, WM8400_ID, 1, &reg);
+	if (ret != 0) {
+		dev_err(wm8400->dev, "ID register read failed: %d\n", ret);
+		return ret;
+	}
+	reg = (reg & WM8400_CHIP_REV_MASK) >> WM8400_CHIP_REV_SHIFT;
+	dev_info(wm8400->dev, "WM8400 revision %x\n", reg);
+
+	if (pdata && pdata->platform_init) {
+		ret = pdata->platform_init(wm8400->dev);
+		if (ret != 0)
+			dev_err(wm8400->dev, "Platform init failed: %d\n",
+				ret);
+	} else
+		dev_warn(wm8400->dev, "No platform initialisation supplied\n");
+
+	return ret;
+}
+
+static void wm8400_release(struct wm8400 *wm8400)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(wm8400->regulators); i++)
+		if (wm8400->regulators[i].name)
+			platform_device_unregister(&wm8400->regulators[i]);
+}
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static int wm8400_i2c_read(void *io_data, char reg, int count, u16 *dest)
+{
+	struct i2c_client *i2c = io_data;
+	struct i2c_msg xfer[2];
+	int ret;
+
+	/* Write register */
+	xfer[0].addr = i2c->addr;
+	xfer[0].flags = 0;
+	xfer[0].len = 1;
+	xfer[0].buf = &reg;
+
+	/* Read data */
+	xfer[1].addr = i2c->addr;
+	xfer[1].flags = I2C_M_RD;
+	xfer[1].len = count * sizeof(u16);
+	xfer[1].buf = (u8 *)dest;
+
+	ret = i2c_transfer(i2c->adapter, xfer, 2);
+	if (ret == 2)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+	return ret;
+}
+
+static int wm8400_i2c_write(void *io_data, char reg, int count, const u16 *src)
+{
+	struct i2c_client *i2c = io_data;
+	u8 *msg;
+	int ret;
+
+	/* We add 1 byte for device register - ideally I2C would gather. */
+	msg = kmalloc((count * sizeof(u16)) + 1, GFP_KERNEL);
+	if (msg == NULL)
+		return -ENOMEM;
+
+	msg[0] = reg;
+	memcpy(&msg[1], src, count * sizeof(u16));
+
+	ret = i2c_master_send(i2c, msg, (count * sizeof(u16)) + 1);
+
+	if (ret == (count * 2) + 1)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+	kfree(msg);
+
+	return ret;
+}
+
+static int wm8400_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct wm8400 *wm8400;
+	int ret;
+
+	wm8400 = kzalloc(sizeof(struct wm8400), GFP_KERNEL);
+	if (wm8400 == NULL) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	wm8400->io_data = i2c;
+	wm8400->read_dev = wm8400_i2c_read;
+	wm8400->write_dev = wm8400_i2c_write;
+	wm8400->dev = &i2c->dev;
+	i2c_set_clientdata(i2c, wm8400);
+
+	ret = wm8400_init(wm8400, i2c->dev.platform_data);
+	if (ret != 0)
+		goto struct_err;
+
+	return 0;
+
+struct_err:
+	i2c_set_clientdata(i2c, NULL);
+	kfree(wm8400);
+err:
+	return ret;
+}
+
+static int wm8400_i2c_remove(struct i2c_client *i2c)
+{
+	struct wm8400 *wm8400 = i2c_get_clientdata(i2c);
+
+	wm8400_release(wm8400);
+	i2c_set_clientdata(i2c, NULL);
+	kfree(wm8400);
+
+	return 0;
+}
+
+static const struct i2c_device_id wm8400_i2c_id[] = {
+       { "wm8400", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8400_i2c_id);
+
+static struct i2c_driver wm8400_i2c_driver = {
+	.driver = {
+		.name = "WM8400",
+		.owner = THIS_MODULE,
+	},
+	.probe    = wm8400_i2c_probe,
+	.remove   = wm8400_i2c_remove,
+	.id_table = wm8400_i2c_id,
+};
+#endif
+
+static int __init wm8400_module_init(void)
+{
+	int ret = -ENODEV;
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	ret = i2c_add_driver(&wm8400_i2c_driver);
+	if (ret != 0)
+		pr_err("Failed to register I2C driver: %d\n", ret);
+#endif
+
+	return ret;
+}
+module_init(wm8400_module_init);
+
+static void __exit wm8400_module_exit(void)
+{
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	i2c_del_driver(&wm8400_i2c_driver);
+#endif
+}
+module_exit(wm8400_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");

drivers/regulator/Kconfig

@@ -56,4 +56,28 @@ 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
+	select REGULATOR
+	help
+	  This driver provides support for the voltage regulators of the
+	  WM8400 AudioPlus PMIC.
+
+config REGULATOR_DA903X
+	tristate "Support regulators on Dialog Semiconductor DA9030/DA9034 PMIC"
+	depends on PMIC_DA903X
+	select REGULATOR
+	help
+	  Say y here to support the BUCKs and LDOs regulators found on
+	  Dialog Semiconductor DA9030/DA9034 PMIC.
+
 endmenu

drivers/regulator/Makefile

@@ -8,5 +8,8 @@ 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-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
+obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

drivers/regulator/bq24022.c

@@ -18,13 +18,13 @@
 #include <linux/regulator/bq24022.h>
 #include <linux/regulator/driver.h>
 
+
 static int bq24022_set_current_limit(struct regulator_dev *rdev,
 					int min_uA, int max_uA)
 {
-	struct platform_device *pdev = rdev_get_drvdata(rdev);
-	struct bq24022_mach_info *pdata = pdev->dev.platform_data;
+	struct bq24022_mach_info *pdata = rdev_get_drvdata(rdev);
 
-	dev_dbg(&pdev->dev, "setting current limit to %s mA\n",
+	dev_dbg(rdev_get_dev(rdev), "setting current limit to %s mA\n",
 		max_uA >= 500000 ? "500" : "100");
 
 	/* REVISIT: maybe return error if min_uA != 0 ? */
@@ -34,18 +34,16 @@ static int bq24022_set_current_limit(struct regulator_dev *rdev,
 
 static int bq24022_get_current_limit(struct regulator_dev *rdev)
 {
-	struct platform_device *pdev = rdev_get_drvdata(rdev);
-	struct bq24022_mach_info *pdata = pdev->dev.platform_data;
+	struct bq24022_mach_info *pdata = rdev_get_drvdata(rdev);
 
 	return gpio_get_value(pdata->gpio_iset2) ? 500000 : 100000;
 }
 
 static int bq24022_enable(struct regulator_dev *rdev)
 {
-	struct platform_device *pdev = rdev_get_drvdata(rdev);
-	struct bq24022_mach_info *pdata = pdev->dev.platform_data;
+	struct bq24022_mach_info *pdata = rdev_get_drvdata(rdev);
 
-	dev_dbg(&pdev->dev, "enabling charger\n");
+	dev_dbg(rdev_get_dev(rdev), "enabling charger\n");
 
 	gpio_set_value(pdata->gpio_nce, 0);
 	return 0;
@@ -53,10 +51,9 @@ static int bq24022_enable(struct regulator_dev *rdev)
 
 static int bq24022_disable(struct regulator_dev *rdev)
 {
-	struct platform_device *pdev = rdev_get_drvdata(rdev);
-	struct bq24022_mach_info *pdata = pdev->dev.platform_data;
+	struct bq24022_mach_info *pdata = rdev_get_drvdata(rdev);
 
-	dev_dbg(&pdev->dev, "disabling charger\n");
+	dev_dbg(rdev_get_dev(rdev), "disabling charger\n");
 
 	gpio_set_value(pdata->gpio_nce, 1);
 	return 0;
@@ -108,7 +105,7 @@ static int __init bq24022_probe(struct platform_device *pdev)
 	ret = gpio_direction_output(pdata->gpio_iset2, 0);
 	ret = gpio_direction_output(pdata->gpio_nce, 1);
 
-	bq24022 = regulator_register(&bq24022_desc, pdev);
+	bq24022 = regulator_register(&bq24022_desc, &pdev->dev, pdata);
 	if (IS_ERR(bq24022)) {
 		dev_dbg(&pdev->dev, "couldn't register regulator\n");
 		ret = PTR_ERR(bq24022);

include/linux/mfd/wm8350/comparator.h

+/*
+ * comparator.h  --  Comparator Aux ADC for Wolfson WM8350 PMIC
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+
+#ifndef __LINUX_MFD_WM8350_COMPARATOR_H_
+#define __LINUX_MFD_WM8350_COMPARATOR_H_
+
+/*
+ * Registers
+ */
+
+#define WM8350_DIGITISER_CONTROL_1              0x90
+#define WM8350_DIGITISER_CONTROL_2              0x91
+#define WM8350_AUX1_READBACK                    0x98
+#define WM8350_AUX2_READBACK                    0x99
+#define WM8350_AUX3_READBACK                    0x9A
+#define WM8350_AUX4_READBACK                    0x9B
+#define WM8350_CHIP_TEMP_READBACK               0x9F
+#define WM8350_GENERIC_COMPARATOR_CONTROL       0xA3
+#define WM8350_GENERIC_COMPARATOR_1             0xA4
+#define WM8350_GENERIC_COMPARATOR_2             0xA5
+#define WM8350_GENERIC_COMPARATOR_3             0xA6
+#define WM8350_GENERIC_COMPARATOR_4             0xA7
+
+/*
+ * R144 (0x90) - Digitiser Control (1)
+ */
+#define WM8350_AUXADC_CTC                       0x4000
+#define WM8350_AUXADC_POLL                      0x2000
+#define WM8350_AUXADC_HIB_MODE                  0x1000
+#define WM8350_AUXADC_SEL8                      0x0080
+#define WM8350_AUXADC_SEL7                      0x0040
+#define WM8350_AUXADC_SEL6                      0x0020
+#define WM8350_AUXADC_SEL5                      0x0010
+#define WM8350_AUXADC_SEL4                      0x0008
+#define WM8350_AUXADC_SEL3                      0x0004
+#define WM8350_AUXADC_SEL2                      0x0002
+#define WM8350_AUXADC_SEL1                      0x0001
+
+/*
+ * R145 (0x91) - Digitiser Control (2)
+ */
+#define WM8350_AUXADC_MASKMODE_MASK             0x3000
+#define WM8350_AUXADC_CRATE_MASK                0x0700
+#define WM8350_AUXADC_CAL                       0x0004
+#define WM8350_AUX_RBMODE                       0x0002
+#define WM8350_AUXADC_WAIT                      0x0001
+
+/*
+ * R152 (0x98) - AUX1 Readback
+ */
+#define WM8350_AUXADC_SCALE1_MASK               0x6000
+#define WM8350_AUXADC_REF1                      0x1000
+#define WM8350_AUXADC_DATA1_MASK                0x0FFF
+
+/*
+ * R153 (0x99) - AUX2 Readback
+ */
+#define WM8350_AUXADC_SCALE2_MASK               0x6000
+#define WM8350_AUXADC_REF2                      0x1000
+#define WM8350_AUXADC_DATA2_MASK                0x0FFF
+
+/*
+ * R154 (0x9A) - AUX3 Readback
+ */
+#define WM8350_AUXADC_SCALE3_MASK               0x6000
+#define WM8350_AUXADC_REF3                      0x1000
+#define WM8350_AUXADC_DATA3_MASK                0x0FFF
+
+/*
+ * R155 (0x9B) - AUX4 Readback
+ */
+#define WM8350_AUXADC_SCALE4_MASK               0x6000
+#define WM8350_AUXADC_REF4                      0x1000
+#define WM8350_AUXADC_DATA4_MASK                0x0FFF
+
+/*
+ * R156 (0x9C) - USB Voltage Readback
+ */
+#define WM8350_AUXADC_DATA_USB_MASK             0x0FFF
+
+/*
+ * R157 (0x9D) - LINE Voltage Readback
+ */
+#define WM8350_AUXADC_DATA_LINE_MASK            0x0FFF
+
+/*
+ * R158 (0x9E) - BATT Voltage Readback
+ */
+#define WM8350_AUXADC_DATA_BATT_MASK            0x0FFF
+
+/*
+ * R159 (0x9F) - Chip Temp Readback
+ */
+#define WM8350_AUXADC_DATA_CHIPTEMP_MASK        0x0FFF
+
+/*
+ * R163 (0xA3) - Generic Comparator Control
+ */
+#define WM8350_DCMP4_ENA                        0x0008
+#define WM8350_DCMP3_ENA                        0x0004
+#define WM8350_DCMP2_ENA                        0x0002
+#define WM8350_DCMP1_ENA                        0x0001
+
+/*
+ * R164 (0xA4) - Generic comparator 1
+ */
+#define WM8350_DCMP1_SRCSEL_MASK                0xE000
+#define WM8350_DCMP1_GT                         0x1000
+#define WM8350_DCMP1_THR_MASK                   0x0FFF
+
+/*
+ * R165 (0xA5) - Generic comparator 2
+ */
+#define WM8350_DCMP2_SRCSEL_MASK                0xE000
+#define WM8350_DCMP2_GT                         0x1000
+#define WM8350_DCMP2_THR_MASK                   0x0FFF
+
+/*
+ * R166 (0xA6) - Generic comparator 3
+ */
+#define WM8350_DCMP3_SRCSEL_MASK                0xE000
+#define WM8350_DCMP3_GT                         0x1000
+#define WM8350_DCMP3_THR_MASK                   0x0FFF
+
+/*
+ * R167 (0xA7) - Generic comparator 4
+ */
+#define WM8350_DCMP4_SRCSEL_MASK                0xE000
+#define WM8350_DCMP4_GT                         0x1000
+#define WM8350_DCMP4_THR_MASK                   0x0FFF
+
+/*
+ * Interrupts.
+ */
+#define WM8350_IRQ_AUXADC_DATARDY		16
+#define WM8350_IRQ_AUXADC_DCOMP4		17
+#define WM8350_IRQ_AUXADC_DCOMP3		18
+#define WM8350_IRQ_AUXADC_DCOMP2		19
+#define WM8350_IRQ_AUXADC_DCOMP1		20
+#define WM8350_IRQ_SYS_HYST_COMP_FAIL		21
+#define WM8350_IRQ_SYS_CHIP_GT115		22
+#define WM8350_IRQ_SYS_CHIP_GT140		23
+
+/*
+ * USB/2, LINE & BATT = ((VRTC * 2) / 4095)) * 10e6 uV
+ * Where VRTC = 2.7 V
+ */
+#define WM8350_AUX_COEFF			1319
+
+#define WM8350_AUXADC_AUX1			0
+#define WM8350_AUXADC_AUX2			1
+#define WM8350_AUXADC_AUX3			2
+#define WM8350_AUXADC_AUX4			3
+#define WM8350_AUXADC_USB			4
+#define WM8350_AUXADC_LINE			5
+#define WM8350_AUXADC_BATT			6
+#define WM8350_AUXADC_TEMP			7
+
+#endif

include/linux/mfd/wm8350/supply.h

+/*
+ * supply.h  --  Power Supply Driver for Wolfson WM8350 PMIC
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#ifndef __LINUX_MFD_WM8350_SUPPLY_H_
+#define __LINUX_MFD_WM8350_SUPPLY_H_
+
+#include <linux/platform_device.h>
+
+/*
+ * Charger registers
+ */
+#define WM8350_BATTERY_CHARGER_CONTROL_1        0xA8
+#define WM8350_BATTERY_CHARGER_CONTROL_2        0xA9
+#define WM8350_BATTERY_CHARGER_CONTROL_3        0xAA
+
+/*
+ * R168 (0xA8) - Battery Charger Control 1
+ */
+#define WM8350_CHG_ENA_R168                     0x8000
+#define WM8350_CHG_THR                          0x2000
+#define WM8350_CHG_EOC_SEL_MASK                 0x1C00
+#define WM8350_CHG_TRICKLE_TEMP_CHOKE           0x0200
+#define WM8350_CHG_TRICKLE_USB_CHOKE            0x0100
+#define WM8350_CHG_RECOVER_T                    0x0080
+#define WM8350_CHG_END_ACT                      0x0040
+#define WM8350_CHG_FAST                         0x0020
+#define WM8350_CHG_FAST_USB_THROTTLE            0x0010
+#define WM8350_CHG_NTC_MON                      0x0008
+#define WM8350_CHG_BATT_HOT_MON                 0x0004
+#define WM8350_CHG_BATT_COLD_MON                0x0002
+#define WM8350_CHG_CHIP_TEMP_MON                0x0001
+
+/*
+ * R169 (0xA9) - Battery Charger Control 2
+ */
+#define WM8350_CHG_ACTIVE                       0x8000
+#define WM8350_CHG_PAUSE                        0x4000
+#define WM8350_CHG_STS_MASK                     0x3000
+#define WM8350_CHG_TIME_MASK                    0x0F00
+#define WM8350_CHG_MASK_WALL_FB                 0x0080
+#define WM8350_CHG_TRICKLE_SEL                  0x0040
+#define WM8350_CHG_VSEL_MASK                    0x0030
+#define WM8350_CHG_ISEL_MASK                    0x000F
+#define WM8350_CHG_STS_OFF                      0x0000
+#define WM8350_CHG_STS_TRICKLE                  0x1000
+#define WM8350_CHG_STS_FAST                     0x2000
+
+/*
+ * R170 (0xAA) - Battery Charger Control 3
+ */
+#define WM8350_CHG_THROTTLE_T_MASK              0x0060
+#define WM8350_CHG_SMART                        0x0010
+#define WM8350_CHG_TIMER_ADJT_MASK              0x000F
+
+/*
+ * Charger Interrupts
+ */
+#define WM8350_IRQ_CHG_BAT_HOT			0
+#define WM8350_IRQ_CHG_BAT_COLD			1
+#define WM8350_IRQ_CHG_BAT_FAIL			2
+#define WM8350_IRQ_CHG_TO			3
+#define WM8350_IRQ_CHG_END			4
+#define WM8350_IRQ_CHG_START			5
+#define WM8350_IRQ_CHG_FAST_RDY			6
+#define WM8350_IRQ_CHG_VBATT_LT_3P9		10
+#define WM8350_IRQ_CHG_VBATT_LT_3P1		11
+#define WM8350_IRQ_CHG_VBATT_LT_2P85		12
+
+/*
+ * Charger Policy
+ */
+#define WM8350_CHG_TRICKLE_50mA			(0 << 6)
+#define WM8350_CHG_TRICKLE_100mA		(1 << 6)
+#define WM8350_CHG_4_05V			(0 << 4)
+#define WM8350_CHG_4_10V			(1 << 4)
+#define WM8350_CHG_4_15V			(2 << 4)
+#define WM8350_CHG_4_20V			(3 << 4)
+#define WM8350_CHG_FAST_LIMIT_mA(x)		((x / 50) & 0xf)
+#define WM8350_CHG_EOC_mA(x)			(((x - 10) & 0x7) << 10)
+#define WM8350_CHG_TRICKLE_3_1V			(0 << 13)
+#define WM8350_CHG_TRICKLE_3_9V			(1 << 13)
+
+/*
+ * Supply Registers.
+ */
+#define WM8350_USB_VOLTAGE_READBACK             0x9C
+#define WM8350_LINE_VOLTAGE_READBACK            0x9D
+#define WM8350_BATT_VOLTAGE_READBACK            0x9E
+
+/*
+ * Supply Interrupts.
+ */
+#define WM8350_IRQ_USB_LIMIT			15
+#define WM8350_IRQ_EXT_USB_FB			36
+#define WM8350_IRQ_EXT_WALL_FB			37
+#define WM8350_IRQ_EXT_BAT_FB			38
+
+struct wm8350_power {
+	struct platform_device *pdev;
+};
+
+#endif

include/linux/mfd/wm8350/wdt.h

+/*
+ * wdt.h  --  Watchdog Driver for Wolfson WM8350 PMIC
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+
+#ifndef __LINUX_MFD_WM8350_WDT_H_
+#define __LINUX_MFD_WM8350_WDT_H_
+
+#include <linux/platform_device.h>
+
+#define WM8350_WDOG_HIB_MODE                    0x0080
+#define WM8350_WDOG_DEBUG                       0x0040
+#define WM8350_WDOG_MODE_MASK                   0x0030
+#define WM8350_WDOG_TO_MASK                     0x0007
+
+#define WM8350_IRQ_SYS_WDOG_TO			24
+
+struct wm8350_wdt {
+	struct platform_device *pdev;
+};
+
+#endif