diff options
Diffstat (limited to 'sound/soc/codecs/tlv320aic32x4.c')
| -rw-r--r-- | sound/soc/codecs/tlv320aic32x4.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c index f230292ba96b..17df4e32feac 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; } @@ -694,8 +716,8 @@ static struct snd_soc_codec_driver soc_codec_dev_aic32x4 = { .set_bias_level = aic32x4_set_bias_level, }; -static __devinit int aic32x4_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) +static int aic32x4_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) { struct aic32x4_pdata *pdata = i2c->dev.platform_data; struct aic32x4_priv *aic32x4; @@ -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, @@ -724,7 +748,7 @@ static __devinit int aic32x4_i2c_probe(struct i2c_client *i2c, return ret; } -static __devexit int aic32x4_i2c_remove(struct i2c_client *client) +static int aic32x4_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; @@ -742,7 +766,7 @@ static struct i2c_driver aic32x4_i2c_driver = { .owner = THIS_MODULE, }, .probe = aic32x4_i2c_probe, - .remove = __devexit_p(aic32x4_i2c_remove), + .remove = aic32x4_i2c_remove, .id_table = aic32x4_i2c_id, }; |