The voltage controls key press threshold.

Signed-off-by: Anatol Pomozov anatol.pomozov@gmail.com --- .../devicetree/bindings/sound/ts3a227e.txt | 5 ++++ sound/soc/codecs/ts3a227e.c | 27 ++++++++++++++++++++++ 2 files changed, 32 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/ts3a227e.txt b/Documentation/devicetree/bindings/sound/ts3a227e.txt index e8bf23e..a836881 100644 --- a/Documentation/devicetree/bindings/sound/ts3a227e.txt +++ b/Documentation/devicetree/bindings/sound/ts3a227e.txt @@ -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:

diff --git a/sound/soc/codecs/ts3a227e.c b/sound/soc/codecs/ts3a227e.c index 54d431c..5ecfa31 100644 --- a/sound/soc/codecs/ts3a227e.c +++ b/sound/soc/codecs/ts3a227e.c @@ -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) { @@ -266,6 +285,14 @@ 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);