Handle the reset GPIO and reset the device in
pm_runtime_resume
Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
---
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);
--
1.9.1
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