diff options
| author | Anatol Pomozov | 2014-10-11 05:46:36 +0200 |
|---|---|---|
| committer | Mark Brown | 2014-10-20 13:22:20 +0200 |
| commit | 40eb90a18e93fbd4fd0e6892b31241356c3c8e43 (patch) | |
| tree | 401f2d17cb15f745d8f31a7045bff61be7315f15 /sound/soc/codecs/rt5677.c | |
| parent | ASoC: rt5677: Include gpio driver header (diff) | |
| download | kernel-qcow2-linux-40eb90a18e93fbd4fd0e6892b31241356c3c8e43.tar.gz kernel-qcow2-linux-40eb90a18e93fbd4fd0e6892b31241356c3c8e43.tar.xz kernel-qcow2-linux-40eb90a18e93fbd4fd0e6892b31241356c3c8e43.zip | |
ASoC: rt5677: Add option to configure gpio as floating/pullup/pulldown
gpio_config is array of 6 elements that allows to set GPIO as
floating, pullup, pulldown.
Sponsored: Google ChromeOS
Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/rt5677.c')
| -rw-r--r-- | sound/soc/codecs/rt5677.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c index 16aa4d99a713..a454df39b7a5 100644 --- a/sound/soc/codecs/rt5677.c +++ b/sound/soc/codecs/rt5677.c @@ -3309,6 +3309,38 @@ static int rt5677_gpio_direction_in(struct gpio_chip *chip, unsigned offset) return 0; } +/** Configures the gpio as + * 0 - floating + * 1 - pull down + * 2 - pull up + */ +static void rt5677_gpio_config(struct rt5677_priv *rt5677, unsigned offset, + int value) +{ + int shift; + + switch (offset) { + case RT5677_GPIO1 ... RT5677_GPIO2: + shift = 2 * (1 - offset); + regmap_update_bits(rt5677->regmap, + RT5677_PR_BASE + RT5677_DIG_IN_PIN_ST_CTRL2, + 0x3 << shift, + (value & 0x3) << shift); + break; + + case RT5677_GPIO3 ... RT5677_GPIO6: + shift = 2 * (9 - offset); + regmap_update_bits(rt5677->regmap, + RT5677_PR_BASE + RT5677_DIG_IN_PIN_ST_CTRL3, + 0x3 << shift, + (value & 0x3) << shift); + break; + + default: + break; + } +} + static struct gpio_chip rt5677_template_chip = { .label = "rt5677", .owner = THIS_MODULE, @@ -3353,6 +3385,7 @@ static void rt5677_free_gpio(struct i2c_client *i2c) static int rt5677_probe(struct snd_soc_codec *codec) { struct rt5677_priv *rt5677 = snd_soc_codec_get_drvdata(codec); + int i; rt5677->codec = codec; @@ -3371,6 +3404,9 @@ static int rt5677_probe(struct snd_soc_codec *codec) regmap_write(rt5677->regmap, RT5677_DIG_MISC, 0x0020); regmap_write(rt5677->regmap, RT5677_PWR_DSP2, 0x0c00); + for (i = 0; i < RT5677_GPIO_NUM; i++) + rt5677_gpio_config(rt5677, i, rt5677->pdata.gpio_config[i]); + return 0; } @@ -3590,6 +3626,9 @@ static int rt5677_parse_dt(struct rt5677_priv *rt5677, struct device_node *np) (rt5677->pow_ldo2 != -ENOENT)) return rt5677->pow_ldo2; + of_property_read_u8_array(np, "realtek,gpio-config", + rt5677->pdata.gpio_config, RT5677_GPIO_NUM); + return 0; } |