ASoC: rt5645: Introduce mapping for ACPI-defined GPIO

On at least one laptop (ECS EF20EA) the 'hp-detect' GPIO is defined in
the DSDT table by the ACPI GpioIo resources in _CRS. The GPIO related
information should be mapped to the rt5645 driver to enable the jack
detection also on non-DT platforms.
Signed-off-by: Chris Chiu <chiu@endlessos.org>
Link: https://lore.kernel.org/r/20210111054141.4668-2-chiu@endlessos.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -42,6 +42,8 @@ static unsigned int quirk = -1;
 module_param(quirk, uint, 0444);
 MODULE_PARM_DESC(quirk, "RT5645 pdata quirk override");
 
+static const struct acpi_gpio_mapping *cht_rt5645_gpios;
+
 #define RT5645_DEVICE_ID 0x6308
 #define RT5650_DEVICE_ID 0x6419
 
@@ -3831,6 +3833,10 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
 		rt5645->pdata.dmic2_data_pin = QUIRK_DMIC2_DATA_PIN(quirk);
 	}
 
+	if (cht_rt5645_gpios && has_acpi_companion(&i2c->dev))
+		if (devm_acpi_dev_add_driver_gpios(&i2c->dev, cht_rt5645_gpios))
+			dev_dbg(&i2c->dev, "Failed to add driver gpios\n");
+
 	rt5645->gpiod_hp_det = devm_gpiod_get_optional(&i2c->dev, "hp-detect",
 						       GPIOD_IN);