Merge remote-tracking branch 'asoc/topic/tlv320aic32x4' into asoc-next

3 files changed, 28 insertions, 0 deletions

diff --git a/include/sound/tlv320aic32x4.h b/include/sound/tlv320aic32x4.h
index c009f70b4029..24e5d991f148 100644
--- a/include/sound/tlv320aic32x4.h
+++ b/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/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index f230292ba96b..e39e08d5d8e4 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/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/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h
index aae2b2440398..35774223fd91 100644
--- a/sound/soc/codecs/tlv320aic32x4.h
+++ b/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