From a98143a589b464aaf1a6e96b9f624265b3580b83 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Mon, 10 Dec 2012 00:22:20 +0900
Subject: [PATCH] --- yaml --- r: 342939 b: refs/heads/master c:
 c0324fb3a1bc4691b1139ae1db34a2dbe282ff29 h: refs/heads/master i:   342937:
 23af95cb63e4f4ede53aa046d384184e16333863   342935:
 068c530cd334d0f57ae9b195c19e992c72f2c29f v: v3

---
 [refs]                                 |  2 +-
 trunk/include/sound/tlv320aic32x4.h    |  1 +
 trunk/sound/soc/codecs/tlv320aic32x4.c | 24 ++++++++++++++++++++++++
 trunk/sound/soc/codecs/tlv320aic32x4.h |  3 +++
 4 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 4053231c141d..3067bc09103b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2ca5e86c4caae2509f2eba0fcd86be05e224019d
+refs/heads/master: c0324fb3a1bc4691b1139ae1db34a2dbe282ff29
diff --git a/trunk/include/sound/tlv320aic32x4.h b/trunk/include/sound/tlv320aic32x4.h
index c009f70b4029..24e5d991f148 100644
--- a/trunk/include/sound/tlv320aic32x4.h
+++ b/trunk/include/sound/tlv320aic32x4.h
@@ -26,6 +26,7 @@ struct aic32x4_pdata {
 	u32 power_cfg;
 	u32 micpga_routing;
 	bool swapdacs;
+	int rstn_gpio;
 };
 
 #endif
diff --git a/trunk/sound/soc/codecs/tlv320aic32x4.c b/trunk/sound/soc/codecs/tlv320aic32x4.c
index f230292ba96b..e39e08d5d8e4 100644
--- a/trunk/sound/soc/codecs/tlv320aic32x4.c
+++ b/trunk/sound/soc/codecs/tlv320aic32x4.c
@@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
+#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/cdev.h>
 #include <linux/slab.h>
@@ -65,6 +66,7 @@ struct aic32x4_priv {
 	u32 power_cfg;
 	u32 micpga_routing;
 	bool swapdacs;
+	int rstn_gpio;
 };
 
 /* 0dB min, 1dB steps */
@@ -627,10 +629,20 @@ static int aic32x4_probe(struct snd_soc_codec *codec)
 {
 	struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec);
 	u32 tmp_reg;
+	int ret;
 
 	codec->hw_write = (hw_write_t) i2c_master_send;
 	codec->control_data = aic32x4->control_data;
 
+	if (aic32x4->rstn_gpio >= 0) {
+		ret = devm_gpio_request_one(codec->dev, aic32x4->rstn_gpio,
+				GPIOF_OUT_INIT_LOW, "tlv320aic32x4 rstn");
+		if (ret != 0)
+			return ret;
+		ndelay(10);
+		gpio_set_value(aic32x4->rstn_gpio, 1);
+	}
+
 	snd_soc_write(codec, AIC32X4_RESET, 0x01);
 
 	/* Power platform configuration */
@@ -675,6 +687,16 @@ static int aic32x4_probe(struct snd_soc_codec *codec)
 			     ARRAY_SIZE(aic32x4_snd_controls));
 	aic32x4_add_widgets(codec);
 
+	/*
+	 * Workaround: for an unknown reason, the ADC needs to be powered up
+	 * and down for the first capture to work properly. It seems related to
+	 * a HW BUG or some kind of behavior not documented in the datasheet.
+	 */
+	tmp_reg = snd_soc_read(codec, AIC32X4_ADCSETUP);
+	snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg |
+				AIC32X4_LADC_EN | AIC32X4_RADC_EN);
+	snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg);
+
 	return 0;
 }
 
@@ -713,10 +735,12 @@ static __devinit int aic32x4_i2c_probe(struct i2c_client *i2c,
 		aic32x4->power_cfg = pdata->power_cfg;
 		aic32x4->swapdacs = pdata->swapdacs;
 		aic32x4->micpga_routing = pdata->micpga_routing;
+		aic32x4->rstn_gpio = pdata->rstn_gpio;
 	} else {
 		aic32x4->power_cfg = 0;
 		aic32x4->swapdacs = false;
 		aic32x4->micpga_routing = 0;
+		aic32x4->rstn_gpio = -1;
 	}
 
 	ret = snd_soc_register_codec(&i2c->dev,
diff --git a/trunk/sound/soc/codecs/tlv320aic32x4.h b/trunk/sound/soc/codecs/tlv320aic32x4.h
index aae2b2440398..35774223fd91 100644
--- a/trunk/sound/soc/codecs/tlv320aic32x4.h
+++ b/trunk/sound/soc/codecs/tlv320aic32x4.h
@@ -94,6 +94,9 @@
 #define AIC32X4_WORD_LEN_24BITS		0x02
 #define AIC32X4_WORD_LEN_32BITS		0x03
 
+#define AIC32X4_LADC_EN			(1 << 7)
+#define AIC32X4_RADC_EN			(1 << 6)
+
 #define AIC32X4_I2S_MODE		0x00
 #define AIC32X4_DSP_MODE		0x01
 #define AIC32X4_RIGHT_JUSTIFIED_MODE	0x02