ALSA: ASoC: Add AK4535 driver

The AK4535 codec is included in some HP iPAQ systems.

This driver was originally written by Richard Purdie and with some bug
fixes from Milan Plzik.  While out of tree it has also had some
mechanical updates for new APIs and current best practices from Liam
Girdwood, Graeme Gregory and Mark Brown.
Signed-off-by: Richard Purdie <richard@openedhand.com>
Signed-off-by: Milan Plzik <milan.plzik@gmail.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/soc/codecs/Kconfig

@@ -2,6 +2,9 @@ config SND_SOC_AC97_CODEC
 	tristate
 	select SND_AC97_CODEC
 
+config SND_SOC_AK4535
+	tristate
+
 config SND_SOC_UDA1380
         tristate
 

sound/soc/codecs/Makefile

 snd-soc-ac97-objs := ac97.o
+snd-soc-ak4535-objs := ak4535.o
 snd-soc-uda1380-objs := uda1380.o
 snd-soc-wm8510-objs := wm8510.o
 snd-soc-wm8731-objs := wm8731.o
@@ -11,6 +12,7 @@ snd-soc-cs4270-objs := cs4270.o
 snd-soc-tlv320aic3x-objs := tlv320aic3x.o
 
 obj-$(CONFIG_SND_SOC_AC97_CODEC)	+= snd-soc-ac97.o
+obj-$(CONFIG_SND_SOC_AK4535)	+= snd-soc-ak4535.o
 obj-$(CONFIG_SND_SOC_UDA1380)	+= snd-soc-uda1380.o
 obj-$(CONFIG_SND_SOC_WM8510)	+= snd-soc-wm8510.o
 obj-$(CONFIG_SND_SOC_WM8731)	+= snd-soc-wm8731.o

sound/soc/codecs/ak4535.h

+/*
+ * ak4535.h  --  AK4535 Soc Audio driver
+ *
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <richard@openedhand.com>
+ *
+ * Based on wm8753.h
+ *
+ * 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 _AK4535_H
+#define _AK4535_H
+
+/* AK4535 register space */
+
+#define AK4535_PM1		0x0
+#define AK4535_PM2		0x1
+#define AK4535_SIG1		0x2
+#define AK4535_SIG2		0x3
+#define AK4535_MODE1		0x4
+#define AK4535_MODE2		0x5
+#define AK4535_DAC		0x6
+#define AK4535_MIC		0x7
+#define AK4535_TIMER		0x8
+#define AK4535_ALC1		0x9
+#define AK4535_ALC2		0xa
+#define AK4535_PGA		0xb
+#define AK4535_LATT		0xc
+#define AK4535_RATT		0xd
+#define AK4535_VOL		0xe
+#define AK4535_STATUS		0xf
+
+#define AK4535_CACHEREGNUM 	0x10
+
+struct ak4535_setup_data {
+	unsigned short i2c_address;
+};
+
+extern struct snd_soc_codec_dai ak4535_dai;
+extern struct snd_soc_codec_device soc_codec_dev_ak4535;
+
+#endif