ASoC: Add platform data for WM8958/WM1811 microphone detection rates

Allow systems to override the default microphone detection rates using
platform data in case the settings are not suitable (eg, due to an
unusually noisy jack).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/linux/mfd/wm8994/pdata.h

@@ -113,6 +113,23 @@ struct wm8958_enh_eq_cfg {
 	u16 regs[WM8958_ENH_EQ_REGS];
 };
 
+/**
+ * Microphone detection rates, used to tune response rates and power
+ * consumption for WM8958/WM1811 microphone detection.
+ *
+ * @sysclk: System clock rate to use this configuration for.
+ * @idle: True if this configuration should use when no accessory is detected,
+ *        false otherwise.
+ * @start: Value for MICD_BIAS_START_TIME register field (not shifted).
+ * @rate: Value for MICD_RATE register field (not shifted).
+ */
+struct wm8958_micd_rate {
+	int sysclk;
+	bool idle;
+	int start;
+	int rate;
+};
+
 struct wm8994_pdata {
 	int gpio_base;
 
@@ -144,6 +161,9 @@ struct wm8994_pdata {
 	int num_enh_eq_cfgs;
 	struct wm8958_enh_eq_cfg *enh_eq_cfgs;
 
+	int num_micd_rates;
+	struct wm8958_micd_rate *micd_rates;
+
         /* LINEOUT can be differential or single ended */
         unsigned int lineout1_diff:1;
         unsigned int lineout2_diff:1;

sound/soc/codecs/wm8994.c

@@ -60,13 +60,6 @@ static int wm8994_retune_mobile_base[] = {
 
 static void wm8958_default_micdet(u16 status, void *data);
 
-struct wm8958_micd_rate {
-	int sysclk;
-	bool idle;
-	int start;
-	int rate;
-};
-
 static const struct wm8958_micd_rate micdet_rates[] = {
 	{ 32768,       true,  1, 4 },
 	{ 32768,       false, 1, 1 },
@@ -100,7 +93,10 @@ static void wm8958_micd_set_rate(struct snd_soc_codec *codec)
 	else
 		sysclk = wm8994->aifclk[0];
 
-	if (wm8994->jackdet) {
+	if (wm8994->pdata && wm8994->pdata->micd_rates) {
+		rates = wm8994->pdata->micd_rates;
+		num_rates = wm8994->pdata->num_micd_rates;
+	} else if (wm8994->jackdet) {
 		rates = jackdet_rates;
 		num_rates = ARRAY_SIZE(jackdet_rates);
 	} else {