Unverified Commit bfe95dfa authored by S.j. Wang's avatar S.j. Wang Committed by Mark Brown
Browse files

ASoC: cs42xx8: Add reset gpio handling 



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

Signed-off-by: default avatarShengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b1f35dfd

sound/soc/codecs/cs42xx8.c

+13 −0
Original line number Diff line number Diff line
@@ -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;