Handle the reset GPIO and reset the device in pm_runtime_resume

Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com --- sound/soc/codecs/cs42xx8.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)

diff --git a/sound/soc/codecs/cs42xx8.c b/sound/soc/codecs/cs42xx8.c index ebb9e0cf8364..fc28e6d26c6d 100644 --- a/sound/soc/codecs/cs42xx8.c +++ b/sound/soc/codecs/cs42xx8.c @@ -14,6 +14,7 @@ #include <linux/delay.h> #include <linux/module.h> #include <linux/of_device.h> +#include <linux/of_gpio.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <sound/pcm_params.h> @@ -45,6 +46,7 @@ struct cs42xx8_priv { bool slave_mode; unsigned long sysclk; u32 tx_channels; + int gpio_reset; };

/* -127.5dB to 0dB with step of 0.5dB */ @@ -467,6 +469,17 @@ int cs42xx8_probe(struct device *dev, struct regmap *regmap) return -EINVAL; }

+ cs42xx8->gpio_reset = of_get_named_gpio(dev->of_node, "gpio-reset", 0); + if (gpio_is_valid(cs42xx8->gpio_reset)) { + ret = devm_gpio_request_one(dev, cs42xx8->gpio_reset, + GPIOF_OUT_INIT_LOW, "cs42xx8 reset"); + if (ret) { + dev_err(dev, "unable to get reset gpio\n"); + return ret; + } + gpio_set_value_cansleep(cs42xx8->gpio_reset, 1); + } + cs42xx8->clk = devm_clk_get(dev, "mclk"); if (IS_ERR(cs42xx8->clk)) { dev_err(dev, "failed to get the clock: %ld\n", @@ -547,6 +560,11 @@ static int cs42xx8_runtime_resume(struct device *dev) return ret; }

+ if (gpio_is_valid(cs42xx8->gpio_reset)) { + gpio_set_value_cansleep(cs42xx8->gpio_reset, 0); + gpio_set_value_cansleep(cs42xx8->gpio_reset, 1); + } + ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies); if (ret) { @@ -559,6 +577,7 @@ static int cs42xx8_runtime_resume(struct device *dev)

regcache_cache_only(cs42xx8->regmap, false);

+ regcache_mark_dirty(cs42xx8->regmap); ret = regcache_sync(cs42xx8->regmap); if (ret) { dev_err(dev, "failed to sync regmap: %d\n", ret);