mfd: arizona: Provide platform data for MICBIAS configuration

Allow the MICBIAS voltages and other attributes to be configured by the
platform.

Signed-off-by: Mark Brown <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/arizona-core.c

···
 		goto err_reset;
 	}
 
+	for (i = 0; i < ARIZONA_MAX_MICBIAS; i++) {
+		if (!arizona->pdata.micbias[i].mV)
+			continue;
+
+		val = (arizona->pdata.micbias[i].mV - 1500) / 100;
+		val <<= ARIZONA_MICB1_LVL_SHIFT;
+
+		if (arizona->pdata.micbias[i].ext_cap)
+			val |= ARIZONA_MICB1_EXT_CAP;
+
+		if (arizona->pdata.micbias[i].discharge)
+			val |= ARIZONA_MICB1_DISCH;
+
+		if (arizona->pdata.micbias[i].fast_start)
+			val |= ARIZONA_MICB1_RATE;
+
+		regmap_update_bits(arizona->regmap,
+				   ARIZONA_MIC_BIAS_CTRL_1 + i,
+				   ARIZONA_MICB1_LVL_MASK |
+				   ARIZONA_MICB1_DISCH |
+				   ARIZONA_MICB1_RATE, val);
+	}
+
 	for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
 		/* Default for both is 0 so noop with defaults */
 		val = arizona->pdata.dmic_ref[i]

include/linux/mfd/arizona/pdata.h

···
 #define ARIZONA_DMIC_MICBIAS2 2
 #define ARIZONA_DMIC_MICBIAS3 3
 
+#define ARIZONA_MAX_MICBIAS 3
+
 #define ARIZONA_INMODE_DIFF 0
 #define ARIZONA_INMODE_SE   1
 #define ARIZONA_INMODE_DMIC 2
···
 #define ARIZONA_MAX_PDM_SPK 2
 
 struct regulator_init_data;
+
+struct arizona_micbias {
+	int mV;                    /** Regulated voltage */
+	unsigned int ext_cap:1;    /** External capacitor fitted */
+	unsigned int discharge:1;  /** Actively discharge */
+	unsigned int fast_start:1; /** Enable aggressive startup ramp rate */
+};
 
 struct arizona_micd_config {
 	unsigned int src;
···
 
 	/** Reference voltage for DMIC inputs */
 	int dmic_ref[ARIZONA_MAX_INPUT];
+
+	/** MICBIAS configurations */
+	struct arizona_micbias micbias[ARIZONA_MAX_MICBIAS];
 
 	/** Mode of input structures */
 	int inmode[ARIZONA_MAX_INPUT];