Commit 39552d7a authored by Anatol Pomozov's avatar Anatol Pomozov Committed by Mark Brown
Browse files

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



The voltage controls key press threshold.

Signed-off-by: default avatarAnatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ddf9ea21

Documentation/devicetree/bindings/sound/ts3a227e.txt

+5 −0
Original line number Diff line number Diff line
@@ -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:

sound/soc/codecs/ts3a227e.c

+27 −0
Original line number Diff line number Diff line
@@ -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);