ASoC: add RT5640 CODEC driver

This patch adds the ALC5640 codec driver.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/rt5640.h

+/*
+ * linux/sound/rt5640.h -- Platform data for RT5640
+ *
+ * Copyright 2011 Realtek Microelectronics
+ *
+ * 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_RT5640_H
+#define __LINUX_SND_RT5640_H
+
+struct rt5640_platform_data {
+	/* IN1 & IN2 can optionally be differential */
+	bool in1_diff;
+	bool in2_diff;
+
+	int ldo1_en; /* GPIO for LDO1_EN */
+};
+
+#endif

sound/soc/codecs/Kconfig

@@ -56,6 +56,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_OMAP_HDMI_CODEC if OMAP4_DSS_HDMI
 	select SND_SOC_PCM3008
 	select SND_SOC_RT5631 if I2C
+	select SND_SOC_RT5640 if I2C
 	select SND_SOC_SGTL5000 if I2C
 	select SND_SOC_SI476X if MFD_SI476X_CORE
 	select SND_SOC_SN95031 if INTEL_SCU_IPC
@@ -296,6 +297,9 @@ config SND_SOC_PCM3008
 config SND_SOC_RT5631
 	tristate
 
+config SND_SOC_RT5640
+	tristate
+
 #Freescale sgtl5000 codec
 config SND_SOC_SGTL5000
 	tristate

sound/soc/codecs/Makefile

@@ -44,6 +44,7 @@ snd-soc-ml26124-objs := ml26124.o
 snd-soc-omap-hdmi-codec-objs := omap-hdmi.o
 snd-soc-pcm3008-objs := pcm3008.o
 snd-soc-rt5631-objs := rt5631.o
+snd-soc-rt5640-objs := rt5640.o
 snd-soc-sgtl5000-objs := sgtl5000.o
 snd-soc-alc5623-objs := alc5623.o
 snd-soc-alc5632-objs := alc5632.o
@@ -171,6 +172,7 @@ obj-$(CONFIG_SND_SOC_ML26124)	+= snd-soc-ml26124.o
 obj-$(CONFIG_SND_SOC_OMAP_HDMI_CODEC) += snd-soc-omap-hdmi-codec.o
 obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o
 obj-$(CONFIG_SND_SOC_RT5631)	+= snd-soc-rt5631.o
+obj-$(CONFIG_SND_SOC_RT5640)	+= snd-soc-rt5640.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
 obj-$(CONFIG_SND_SOC_SIGMADSP)	+= snd-soc-sigmadsp.o
 obj-$(CONFIG_SND_SOC_SI476X)	+= snd-soc-si476x.o