This patch adds platform data support for a reset GPIO. Also uses reset_gpio to toggle reset of the CODEC
Signed-off-by: Brian Austin brian.austin@cirrus.com --- include/sound/cs42l52.h | 2 ++ sound/soc/codecs/cs42l52.c | 21 +++++++++++++++++---- 2 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/include/sound/cs42l52.h b/include/sound/cs42l52.h index 4c68955..7c2be4a 100644 --- a/include/sound/cs42l52.h +++ b/include/sound/cs42l52.h @@ -31,6 +31,8 @@ struct cs42l52_platform_data { /* Charge Pump Freq. Check datasheet Pg73 */ unsigned int chgfreq;
+ /* Reset GPIO */ + unsigned int reset_gpio; };
#endif /* __CS42L52_H */ diff --git a/sound/soc/codecs/cs42l52.c b/sound/soc/codecs/cs42l52.c index be2ba1b..8367f3c 100644 --- a/sound/soc/codecs/cs42l52.c +++ b/sound/soc/codecs/cs42l52.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> +#include <linux/gpio.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/input.h> @@ -1205,6 +1206,7 @@ static int cs42l52_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { struct cs42l52_private *cs42l52; + struct cs42l52_platform_data *pdata = dev_get_platdata(&i2c_client->dev); int ret; unsigned int devid = 0; unsigned int reg; @@ -1222,11 +1224,22 @@ static int cs42l52_i2c_probe(struct i2c_client *i2c_client, return ret; }
- i2c_set_clientdata(i2c_client, cs42l52); + if (pdata) + cs42l52->pdata = *pdata;
- if (dev_get_platdata(&i2c_client->dev)) - memcpy(&cs42l52->pdata, dev_get_platdata(&i2c_client->dev), - sizeof(cs42l52->pdata)); + if (cs42l52->pdata.reset_gpio) { + ret = gpio_request_one(cs42l52->pdata.reset_gpio, + GPIOF_OUT_INIT_HIGH, "CS42L52 /RST"); + if (ret < 0) { + dev_err(&i2c_client->dev, "Failed to request /RST %d: %d\n", + cs42l52->pdata.reset_gpio, ret); + return ret; + } + gpio_set_value_cansleep(cs42l52->pdata.reset_gpio, 0); + gpio_set_value_cansleep(cs42l52->pdata.reset_gpio, 1); + } + + i2c_set_clientdata(i2c_client, cs42l52);
ret = regmap_register_patch(cs42l52->regmap, cs42l52_threshold_patch, ARRAY_SIZE(cs42l52_threshold_patch));