diff options
| author | Jean-Jacques Hiblot <jjhiblot@ti.com> | 2018-04-27 16:55:47 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-04-27 21:24:00 +0300 |
| commit | e3976aa6fb409aea3cea812f6a0beebb545e5996 (patch) | |
| tree | 0faf9341156bf1f6d9779b50da0ff6b82a101531 /sound/soc/codecs/tas6424.c | |
| parent | b24c539b4dc58f7d6283b8d06e240ac87d4966d7 (diff) | |
| download | linux-e3976aa6fb409aea3cea812f6a0beebb545e5996.tar.xz | |
ASoC: tas6424: Add support for the standby pin
The standby pin can be connected to a GPIO. In that case we have to drive
it to the correct values for the TAS6424 to operate properly.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/tas6424.c')
| -rw-r--r-- | sound/soc/codecs/tas6424.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sound/soc/codecs/tas6424.c b/sound/soc/codecs/tas6424.c index 4f3a16c520a2..5abb17f8d3dd 100644 --- a/sound/soc/codecs/tas6424.c +++ b/sound/soc/codecs/tas6424.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/regulator/consumer.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -43,6 +44,7 @@ struct tas6424_data { unsigned int last_fault1; unsigned int last_fault2; unsigned int last_warn; + struct gpio_desc *standby_gpio; }; /* @@ -627,6 +629,22 @@ static int tas6424_i2c_probe(struct i2c_client *client, return ret; } + /* + * Get control of the standby pin and set it LOW to take the codec + * out of the stand-by mode. + * Note: The actual pin polarity is taken care of in the GPIO lib + * according the polarity specified in the DTS. + */ + tas6424->standby_gpio = devm_gpiod_get_optional(dev, "standby", + GPIOD_OUT_LOW); + if (IS_ERR(tas6424->standby_gpio)) { + if (PTR_ERR(tas6424->standby_gpio) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_info(dev, "failed to get standby GPIO: %ld\n", + PTR_ERR(tas6424->standby_gpio)); + tas6424->standby_gpio = NULL; + } + for (i = 0; i < ARRAY_SIZE(tas6424->supplies); i++) tas6424->supplies[i].supply = tas6424_supply_names[i]; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(tas6424->supplies), @@ -671,6 +689,10 @@ static int tas6424_i2c_remove(struct i2c_client *client) cancel_delayed_work_sync(&tas6424->fault_check_work); + /* put the codec in stand-by */ + if (tas6424->standby_gpio) + gpiod_set_value_cansleep(tas6424->standby_gpio, 1); + ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret < 0) { |