ASoC: Add WM8974 CODEC driver

The WM8974 is a low power, high quality mono CODEC designed for portable
applications such as digital still cameras or digital voice recorders.

This driver was originally written by Graeme Gregory and Liam Girdwood
and has since been maintained by myself with some updates contributed by
Brett Saunders and Javier Martin.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/Kconfig

@@ -38,6 +38,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_WM8940 if I2C
 	select SND_SOC_WM8960 if I2C
 	select SND_SOC_WM8971 if I2C
+	select SND_SOC_WM8974 if I2C
 	select SND_SOC_WM8988 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_WM8990 if I2C
 	select SND_SOC_WM9081 if I2C
@@ -151,6 +152,9 @@ config SND_SOC_WM8960
 config SND_SOC_WM8971
 	tristate
 
+config SND_SOC_WM8974
+	tristate
+
 config SND_SOC_WM8988
 	tristate
 

sound/soc/codecs/Makefile

@@ -26,6 +26,7 @@ snd-soc-wm8903-objs := wm8903.o
 snd-soc-wm8940-objs := wm8940.o
 snd-soc-wm8960-objs := wm8960.o
 snd-soc-wm8971-objs := wm8971.o
+snd-soc-wm8974-objs := wm8974.o
 snd-soc-wm8988-objs := wm8988.o
 snd-soc-wm8990-objs := wm8990.o
 snd-soc-wm9081-objs := wm9081.o
@@ -59,6 +60,7 @@ obj-$(CONFIG_SND_SOC_WM8753)	+= snd-soc-wm8753.o
 obj-$(CONFIG_SND_SOC_WM8900)	+= snd-soc-wm8900.o
 obj-$(CONFIG_SND_SOC_WM8903)	+= snd-soc-wm8903.o
 obj-$(CONFIG_SND_SOC_WM8971)	+= snd-soc-wm8971.o
+obj-$(CONFIG_SND_SOC_WM8974)	+= snd-soc-wm8974.o
 obj-$(CONFIG_SND_SOC_WM8940)	+= snd-soc-wm8940.o
 obj-$(CONFIG_SND_SOC_WM8960)	+= snd-soc-wm8960.o
 obj-$(CONFIG_SND_SOC_WM8988)	+= snd-soc-wm8988.o

sound/soc/codecs/wm8974.h

+/*
+ * wm8974.h  --  WM8974 Soc Audio driver
+ *
+ * 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 _WM8974_H
+#define _WM8974_H
+
+/* WM8974 register space */
+
+#define WM8974_RESET		0x0
+#define WM8974_POWER1		0x1
+#define WM8974_POWER2		0x2
+#define WM8974_POWER3		0x3
+#define WM8974_IFACE		0x4
+#define WM8974_COMP			0x5
+#define WM8974_CLOCK		0x6
+#define WM8974_ADD			0x7
+#define WM8974_GPIO			0x8
+#define WM8974_DAC			0xa
+#define WM8974_DACVOL		0xb
+#define WM8974_ADC			0xe
+#define WM8974_ADCVOL		0xf
+#define WM8974_EQ1			0x12
+#define WM8974_EQ2			0x13
+#define WM8974_EQ3			0x14
+#define WM8974_EQ4			0x15
+#define WM8974_EQ5			0x16
+#define WM8974_DACLIM1		0x18
+#define WM8974_DACLIM2		0x19
+#define WM8974_NOTCH1		0x1b
+#define WM8974_NOTCH2		0x1c
+#define WM8974_NOTCH3		0x1d
+#define WM8974_NOTCH4		0x1e
+#define WM8974_ALC1			0x20
+#define WM8974_ALC2			0x21
+#define WM8974_ALC3			0x22
+#define WM8974_NGATE		0x23
+#define WM8974_PLLN			0x24
+#define WM8974_PLLK1		0x25
+#define WM8974_PLLK2		0x26
+#define WM8974_PLLK3		0x27
+#define WM8974_ATTEN		0x28
+#define WM8974_INPUT		0x2c
+#define WM8974_INPPGA		0x2d
+#define WM8974_ADCBOOST		0x2f
+#define WM8974_OUTPUT		0x31
+#define WM8974_SPKMIX		0x32
+#define WM8974_SPKVOL		0x36
+#define WM8974_MONOMIX		0x38
+
+#define WM8974_CACHEREGNUM 	57
+
+/* Clock divider Id's */
+#define WM8974_OPCLKDIV		0
+#define WM8974_MCLKDIV		1
+#define WM8974_ADCCLK		2
+#define WM8974_DACCLK		3
+#define WM8974_BCLKDIV		4
+
+/* DAC clock dividers */
+#define WM8974_DACCLK_F2	(1 << 3)
+#define WM8974_DACCLK_F4	(0 << 3)
+
+/* ADC clock dividers */
+#define WM8974_ADCCLK_F2	(1 << 3)
+#define WM8974_ADCCLK_F4	(0 << 3)
+
+/* PLL Out dividers */
+#define WM8974_OPCLKDIV_1	(0 << 4)
+#define WM8974_OPCLKDIV_2	(1 << 4)
+#define WM8974_OPCLKDIV_3	(2 << 4)
+#define WM8974_OPCLKDIV_4	(3 << 4)
+
+/* BCLK clock dividers */
+#define WM8974_BCLKDIV_1	(0 << 2)
+#define WM8974_BCLKDIV_2	(1 << 2)
+#define WM8974_BCLKDIV_4	(2 << 2)
+#define WM8974_BCLKDIV_8	(3 << 2)
+#define WM8974_BCLKDIV_16	(4 << 2)
+#define WM8974_BCLKDIV_32	(5 << 2)
+
+/* MCLK clock dividers */
+#define WM8974_MCLKDIV_1	(0 << 5)
+#define WM8974_MCLKDIV_1_5	(1 << 5)
+#define WM8974_MCLKDIV_2	(2 << 5)
+#define WM8974_MCLKDIV_3	(3 << 5)
+#define WM8974_MCLKDIV_4	(4 << 5)
+#define WM8974_MCLKDIV_6	(5 << 5)
+#define WM8974_MCLKDIV_8	(6 << 5)
+#define WM8974_MCLKDIV_12	(7 << 5)
+
+
+struct wm8974_setup_data {
+	unsigned short i2c_address;
+};
+
+extern struct snd_soc_dai wm8974_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wm8974;
+
+#endif