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ASoC: rt5677: Add option to configure gpio as floating/pullup/pulldown

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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>
This commit is contained in:
Anatol Pomozov 2014-10-10 20:46:36 -07:00 committed by Mark Brown
parent 80fff6bf65
commit 40eb90a18e
3 changed files with 49 additions and 0 deletions
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7
Documentation/devicetree/bindings/sound/rt5677.txt
View File

@ -27,6 +27,12 @@ Optional properties:
Boolean. Indicate MIC1/2 input and LOUT1/2/3 outputs are differential,
rather than single-ended.
- realtek,gpio-config
Array of six 8bit elements that configures GPIO.
0 - floating (reset value)
1 - pull down
2 - pull up
Pins on the device (for linking into audio routes):
* IN1P
@ -56,4 +62,5 @@ rt5677 {
realtek,pow-ldo2-gpio =
<&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>;
realtek,in1-differential = "true";
realtek,gpio-config = /bits/ 8 <0 0 0 0 0 2>; /* pull up GPIO6 */
};

3
include/sound/rt5677.h
View File

@ -27,6 +27,9 @@ struct rt5677_platform_data {
bool lout3_diff;
/* DMIC2 clock source selection */
enum rt5677_dmic2_clk dmic2_clk_pin;
/* configures GPIO, 0 - floating, 1 - pulldown, 2 - pullup */
u8 gpio_config[6];
};
#endif

39
sound/soc/codecs/rt5677.c
View File

@ -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;
}