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ASoC: cs42xx8: Add reset gpio handling 

Handle the reset GPIO and reset the device every time we
start it.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
S.j. Wang 2019-05-16 06:04:58 +00:00 committed by Mark Brown
parent b1f35dfd7c
commit bfe95dfa4d
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GPG Key ID: 24D68B725D5487D0
1 changed files with 13 additions and 0 deletions
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13
sound/soc/codecs/cs42xx8.c
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@ -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;
struct gpio_desc *gpiod_reset;
};
/* -127.5dB to 0dB with step of 0.5dB */
@ -467,6 +469,13 @@ int cs42xx8_probe(struct device *dev, struct regmap *regmap)
return -EINVAL;
}
cs42xx8->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(cs42xx8->gpiod_reset))
return PTR_ERR(cs42xx8->gpiod_reset);
gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0);
cs42xx8->clk = devm_clk_get(dev, "mclk");
if (IS_ERR(cs42xx8->clk)) {
dev_err(dev, "failed to get the clock: %ld\n",
@ -547,6 +556,8 @@ static int cs42xx8_runtime_resume(struct device *dev)
return ret;
}
gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0);
ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
if (ret) {
@ -585,6 +596,8 @@ static int cs42xx8_runtime_suspend(struct device *dev)
regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 1);
clk_disable_unprepare(cs42xx8->clk);
return 0;