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ASoC: ts3a227e: Add dts property that allows to specify micbias voltage 

The voltage controls key press threshold.

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Anatol Pomozov 2015-01-22 15:47:24 -08:00 committed by Mark Brown
parent ddf9ea21f5
commit 39552d7ad1
2 changed files with 32 additions and 0 deletions
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5
Documentation/devicetree/bindings/sound/ts3a227e.txt
View File

@ -13,6 +13,11 @@ Required properties:
- interrupt-parent: The parent interrupt controller
- interrupts: Interrupt number for /INT pin from the 227e
Optional properies:
- ti,micbias: Intended MICBIAS voltage (datasheet section 9.6.7).
Select 0/1/2/3/4/5/6/7 to specify MACBIAS voltage
2.1V/2.2V/2.3V/2.4V/2.5V/2.6V/2.7V/2.8V
Default value is "1" (2.2V).
Examples:

27
sound/soc/codecs/ts3a227e.c
View File

@ -79,6 +79,10 @@ static const int ts3a227e_buttons[] = {
/* TS3A227E_REG_SETTING_2 0x05 */
#define KP_ENABLE 0x04
/* TS3A227E_REG_SETTING_3 0x06 */
#define MICBIAS_SETTING_SFT (3)
#define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT)
/* TS3A227E_REG_ACCESSORY_STATUS 0x0b */
#define TYPE_3_POLE 0x01
#define TYPE_4_POLE_OMTP 0x02
@ -248,6 +252,21 @@ static const struct regmap_config ts3a227e_regmap_config = {
.num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults),
};
static int ts3a227e_parse_dt(struct ts3a227e *ts3a227e, struct device_node *np)
{
u32 micbias;
int err;
err = of_property_read_u32(np, "ti,micbias", &micbias);
if (!err) {
regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3,
MICBIAS_SETTING_MASK,
(micbias & 0x07) << MICBIAS_SETTING_SFT);
}
return 0;
}
static int ts3a227e_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@ -265,6 +284,14 @@ static int ts3a227e_i2c_probe(struct i2c_client *i2c,
if (IS_ERR(ts3a227e->regmap))
return PTR_ERR(ts3a227e->regmap);
if (dev->of_node) {
ret = ts3a227e_parse_dt(ts3a227e, dev->of_node);
if (ret) {
dev_err(dev, "Failed to parse device tree: %d\n", ret);
return ret;
}
}
ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"TS3A227E", ts3a227e);