The codec chip has a physical MUTE pin to let users control it via GPIO. So this patch add a mute control support to the driver.
Signed-off-by: Nicolin Chen nicoleotsuka@gmail.com --- Changelog: v1->v2 * Revise the DT binding part regarding the active state of the mute pin
.../devicetree/bindings/sound/cs53l30.txt | 4 +++ sound/soc/codecs/cs53l30.c | 30 ++++++++++++++++++++++ sound/soc/codecs/cs53l30.h | 1 + 3 files changed, 35 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/cs53l30.txt b/Documentation/devicetree/bindings/sound/cs53l30.txt index 18d6b99..4dbfb82 100644 --- a/Documentation/devicetree/bindings/sound/cs53l30.txt +++ b/Documentation/devicetree/bindings/sound/cs53l30.txt @@ -13,6 +13,10 @@ Optional properties:
- reset-gpios : a GPIO spec for the reset pin.
+ - mute-gpios : a GPIO spec for the MUTE pin. The active state can be either + GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW, which would be handled + by the driver automatically. + - cirrus,micbias-lvl : Set the output voltage level on the MICBIAS Pin. 0 = Hi-Z 1 = 1.80 V diff --git a/sound/soc/codecs/cs53l30.c b/sound/soc/codecs/cs53l30.c index 384a3f7..e46b7de 100644 --- a/sound/soc/codecs/cs53l30.c +++ b/sound/soc/codecs/cs53l30.c @@ -35,6 +35,7 @@ struct cs53l30_private { struct regulator_bulk_data supplies[CS53L30_NUM_SUPPLIES]; struct regmap *regmap; struct gpio_desc *reset_gpio; + struct gpio_desc *mute_gpio; struct clk *mclk; bool use_sdout2; u32 mclk_rate; @@ -833,6 +834,16 @@ static int cs53l30_set_dai_tdm_slot(struct snd_soc_dai *dai, return 0; }
+static int cs53l30_mute_stream(struct snd_soc_dai *dai, int mute, int stream) +{ + struct cs53l30_private *priv = snd_soc_codec_get_drvdata(dai->codec); + + if (priv->mute_gpio) + gpiod_set_value_cansleep(priv->mute_gpio, mute); + + return 0; +} + /* SNDRV_PCM_RATE_KNOT -> 12000, 24000 Hz, limit with constraint list */ #define CS53L30_RATES (SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_KNOT)
@@ -846,6 +857,7 @@ static const struct snd_soc_dai_ops cs53l30_ops = { .set_sysclk = cs53l30_set_sysclk, .set_tristate = cs53l30_set_tristate, .set_tdm_slot = cs53l30_set_dai_tdm_slot, + .mute_stream = cs53l30_mute_stream, };
static struct snd_soc_dai_driver cs53l30_dai = { @@ -990,6 +1002,24 @@ static int cs53l30_i2c_probe(struct i2c_client *client, cs53l30->mclk = NULL; }
+ /* Fetch the MUTE control */ + cs53l30->mute_gpio = devm_gpiod_get_optional(dev, "mute", + GPIOD_OUT_HIGH); + if (IS_ERR(cs53l30->mute_gpio)) { + ret = PTR_ERR(cs53l30->mute_gpio); + goto error; + } + + if (cs53l30->mute_gpio) { + /* Enable MUTE controls via MUTE pin */ + regmap_write(cs53l30->regmap, CS53L30_MUTEP_CTL1, + CS53L30_MUTEP_CTL1_MUTEALL); + /* Flip the polarity of MUTE pin */ + if (gpiod_is_active_low(cs53l30->mute_gpio)) + regmap_update_bits(cs53l30->regmap, CS53L30_MUTEP_CTL2, + CS53L30_MUTE_PIN_POLARITY, 0); + } + if (!of_property_read_u8(np, "cirrus,micbias-lvl", &val)) regmap_update_bits(cs53l30->regmap, CS53L30_MICBIAS_CTL, CS53L30_MIC_BIAS_CTRL_MASK, val); diff --git a/sound/soc/codecs/cs53l30.h b/sound/soc/codecs/cs53l30.h index 0dd4afb..5e39da5 100644 --- a/sound/soc/codecs/cs53l30.h +++ b/sound/soc/codecs/cs53l30.h @@ -253,6 +253,7 @@ #define CS53L30_MUTE_MB_ALL_PDN_MASK (1 << CS53L30_MUTE_MB_ALL_PDN_SHIFT) #define CS53L30_MUTE_MB_ALL_PDN (1 << CS53L30_MUTE_MB_ALL_PDN_SHIFT)
+#define CS53L30_MUTEP_CTL1_MUTEALL (0xdf) #define CS53L30_MUTEP_CTL1_DEFAULT (0)
/* R32 (0x20) CS53L30_MUTEP_CTL2 - MUTE Pin Control 2 */