ASoC: Add WM8915 CODEC driver

The WM8915 is an ultra low power mobile CODEC designed for smartphones,
featuring a mixture of digital and analogue I/O with flexible mixing
options and advanced low power accessory detection functionality in a
compact package.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

include/sound/wm8915.h

+/*
+ * linux/sound/wm8915.h -- Platform data for WM8915
+ *
+ * Copyright 2011 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_SND_WM8903_H
+#define __LINUX_SND_WM8903_H
+
+enum wm8915_inmode {
+	WM8915_DIFFERRENTIAL_1 = 0,   /* IN1xP - IN1xN */
+	WM8915_INVERTING = 1,         /* IN1xN */
+	WM8915_NON_INVERTING = 2,     /* IN1xP */
+	WM8915_DIFFERENTIAL_2 = 3,    /* IN2xP - IN2xP */
+};
+
+/**
+ * ReTune Mobile configurations are specified with a label, sample
+ * rate and set of values to write (the enable bits will be ignored).
+ *
+ * Configurations are expected to be generated using the ReTune Mobile
+ * control panel in WISCE - see http://www.wolfsonmicro.com/wisce/
+ */
+struct wm8915_retune_mobile_config {
+	const char *name;
+	int rate;
+	u16 regs[20];
+};
+
+#define WM8915_SET_DEFAULT 0x10000
+
+struct wm8915_pdata {
+	int irq_flags;  /** Set IRQ trigger flags; default active low */
+
+	int ldo_ena;  /** GPIO for LDO1; -1 for none */
+
+	int micdet_def;  /** Default MICDET_SRC/HP1FB_SRC/MICD_BIAS */
+
+	enum wm8915_inmode inl_mode;
+	enum wm8915_inmode inr_mode;
+
+	u32 spkmute_seq;  /** Value for register 0x802 */
+
+	int gpio_base;
+	u32 gpio_default[5];
+
+	int num_retune_mobile_cfgs;
+	struct wm8915_retune_mobile_config *retune_mobile_cfgs;
+};
+
+#endif

sound/soc/codecs/Kconfig

@@ -73,6 +73,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_WM8900 if I2C
 	select SND_SOC_WM8903 if I2C
 	select SND_SOC_WM8904 if I2C
+	select SND_SOC_WM8915 if I2C
 	select SND_SOC_WM8940 if I2C
 	select SND_SOC_WM8955 if I2C
 	select SND_SOC_WM8960 if I2C
@@ -302,6 +303,9 @@ config SND_SOC_WM8903
 config SND_SOC_WM8904
 	tristate
 
+config SND_SOC_WM8915
+	tristate
+
 config SND_SOC_WM8940
         tristate
 

sound/soc/codecs/Makefile

@@ -57,6 +57,7 @@ snd-soc-wm8804-objs := wm8804.o
 snd-soc-wm8900-objs := wm8900.o
 snd-soc-wm8903-objs := wm8903.o
 snd-soc-wm8904-objs := wm8904.o
+snd-soc-wm8915-objs := wm8915.o
 snd-soc-wm8940-objs := wm8940.o
 snd-soc-wm8955-objs := wm8955.o
 snd-soc-wm8960-objs := wm8960.o
@@ -146,6 +147,7 @@ obj-$(CONFIG_SND_SOC_WM8804)	+= snd-soc-wm8804.o
 obj-$(CONFIG_SND_SOC_WM8900)	+= snd-soc-wm8900.o
 obj-$(CONFIG_SND_SOC_WM8903)	+= snd-soc-wm8903.o
 obj-$(CONFIG_SND_SOC_WM8904)	+= snd-soc-wm8904.o
+obj-$(CONFIG_SND_SOC_WM8915)	+= snd-soc-wm8915.o
 obj-$(CONFIG_SND_SOC_WM8940)	+= snd-soc-wm8940.o
 obj-$(CONFIG_SND_SOC_WM8955)	+= snd-soc-wm8955.o
 obj-$(CONFIG_SND_SOC_WM8960)	+= snd-soc-wm8960.o