ASoC: rt5682: Add a new property for the DMIC clock driving

The patch adds a new property to set the DMIC clock driving.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20201113055400.11242-1-oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/rt5682.h

@@ -40,6 +40,7 @@ struct rt5682_platform_data {
 	unsigned int btndet_delay;
 	unsigned int dmic_clk_rate;
 	unsigned int dmic_delay;
+	bool dmic_clk_driving_high;
 
 	const char *dai_clk_names[RT5682_DAI_NUM_CLKS];
 };

sound/soc/codecs/rt5682-i2c.c

@@ -221,6 +221,11 @@ static int rt5682_i2c_probe(struct i2c_client *i2c,
 		case RT5682_DMIC1_CLK_GPIO3: /* share with BCLK2 */
 			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
 				RT5682_GP3_PIN_MASK, RT5682_GP3_PIN_DMIC_CLK);
+			if (rt5682->pdata.dmic_clk_driving_high)
+				regmap_update_bits(rt5682->regmap,
+					RT5682_PAD_DRIVING_CTRL,
+					RT5682_PAD_DRV_GP3_MASK,
+					2 << RT5682_PAD_DRV_GP3_SFT);
 			break;
 
 		default:

sound/soc/codecs/rt5682.c

@@ -2989,6 +2989,9 @@ int rt5682_parse_dt(struct rt5682_priv *rt5682, struct device *dev)
 			 rt5682->pdata.dai_clk_names[RT5682_DAI_WCLK_IDX],
 			 rt5682->pdata.dai_clk_names[RT5682_DAI_BCLK_IDX]);
 
+	rt5682->pdata.dmic_clk_driving_high = device_property_read_bool(dev,
+		"realtek,dmic-clk-driving-high");
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rt5682_parse_dt);

sound/soc/codecs/rt5682.h

@@ -1271,6 +1271,20 @@
 #define RT5682_CP_CLK_HP_300KHZ			(0x2 << 4)
 #define RT5682_CP_CLK_HP_600KHZ			(0x3 << 4)
 
+/* Pad Driving Control (0x0136) */
+#define RT5682_PAD_DRV_GP1_MASK			(0x3 << 14)
+#define RT5682_PAD_DRV_GP1_SFT			14
+#define RT5682_PAD_DRV_GP2_MASK			(0x3 << 12)
+#define RT5682_PAD_DRV_GP2_SFT			12
+#define RT5682_PAD_DRV_GP3_MASK			(0x3 << 10)
+#define RT5682_PAD_DRV_GP3_SFT			10
+#define RT5682_PAD_DRV_GP4_MASK			(0x3 << 8)
+#define RT5682_PAD_DRV_GP4_SFT			8
+#define RT5682_PAD_DRV_GP5_MASK			(0x3 << 6)
+#define RT5682_PAD_DRV_GP5_SFT			6
+#define RT5682_PAD_DRV_GP6_MASK			(0x3 << 4)
+#define RT5682_PAD_DRV_GP6_SFT			4
+
 /* Chopper and Clock control for DAC (0x013a)*/
 #define RT5682_CKXEN_DAC1_MASK			(0x1 << 13)
 #define RT5682_CKXEN_DAC1_SFT			13