---

yaml
---
r: 283890
b: refs/heads/master
c: 5d680b3
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9d35f3e100eb5cfb91d777c8621fb585ad0327cd
+refs/heads/master: 5d680b3a84b3e870fc1ea01495935e58e17de7aa

trunk/Documentation/devicetree/bindings/sound/wm8903.txt

@@ -0,0 +1,50 @@
+WM8903 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+  - compatible : "wlf,wm8903"
+
+  - reg : the I2C address of the device.
+
+  - gpio-controller : Indicates this device is a GPIO controller.
+
+  - #gpio-cells : Should be two. The first cell is the pin number and the
+    second cell is used to specify optional parameters (currently unused).
+
+Optional properties:
+
+  - interrupts : The interrupt line the codec is connected to.
+
+  - micdet-cfg : Default register value for R6 (Mic Bias). If absent, the
+    default is 0.
+
+  - micdet-delay : The debounce delay for microphone detection in mS. If
+    absent, the default is 100.
+
+  - gpio-cfg : A list of GPIO configuration register values. The list must
+    be 5 entries long. If absent, no configuration of these registers is
+    performed. If any entry has the value 0xffffffff, that GPIO's
+    configuration will not be modified.
+
+Example:
+
+codec: wm8903@1a {
+	compatible = "wlf,wm8903";
+	reg = <0x1a>;
+	interrupts = < 347 >;
+
+	gpio-controller;
+	#gpio-cells = <2>;
+
+	micdet-cfg = <0>;
+	micdet-delay = <100>;
+	gpio-cfg = <
+		0x0600 /* DMIC_LR, output */
+		0x0680 /* DMIC_DAT, input */
+		0x0000 /* GPIO, output, low */
+		0x0200 /* Interrupt, output */
+		0x01a0 /* BCLK, input, active high */
+	>;
+};

trunk/sound/soc/codecs/wm8903.c

@@ -2070,6 +2070,49 @@ static int wm8903_set_pdata_irq_trigger(struct i2c_client *i2c,
 	return 0;
 }
 
+static int wm8903_set_pdata_from_of(struct i2c_client *i2c,
+				    struct wm8903_platform_data *pdata)
+{
+	const struct device_node *np = i2c->dev.of_node;
+	u32 val32;
+	int i;
+
+	if (of_property_read_u32(np, "micdet-cfg", &val32) >= 0)
+		pdata->micdet_cfg = val32;
+
+	if (of_property_read_u32(np, "micdet-delay", &val32) >= 0)
+		pdata->micdet_delay = val32;
+
+	if (of_property_read_u32_array(np, "gpio-cfg", pdata->gpio_cfg,
+				       ARRAY_SIZE(pdata->gpio_cfg)) >= 0) {
+		/*
+		 * In device tree: 0 means "write 0",
+		 * 0xffffffff means "don't touch".
+		 *
+		 * In platform data: 0 means "don't touch",
+		 * 0x8000 means "write 0".
+		 *
+		 * Note: WM8903_GPIO_CONFIG_ZERO == 0x8000.
+		 *
+		 *  Convert from DT to pdata representation here,
+		 * so no other code needs to change.
+		 */
+		for (i = 0; i < ARRAY_SIZE(pdata->gpio_cfg); i++) {
+			if (pdata->gpio_cfg[i] == 0) {
+				pdata->gpio_cfg[i] = WM8903_GPIO_CONFIG_ZERO;
+			} else if (pdata->gpio_cfg[i] == 0xffffffff) {
+				pdata->gpio_cfg[i] = 0;
+			} else if (pdata->gpio_cfg[i] > 0x7fff) {
+				dev_err(&i2c->dev, "Invalid gpio-cfg[%d] %x\n",
+					i, pdata->gpio_cfg[i]);
+				return -EINVAL;
+			}
+		}
+	}
+
+	return 0;
+}
+
 static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
 				      const struct i2c_device_id *id)
 {
@@ -2111,6 +2154,12 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
 			if (ret != 0)
 				return ret;
 		}
+
+		if (i2c->dev.of_node) {
+			ret = wm8903_set_pdata_from_of(i2c, wm8903->pdata);
+			if (ret != 0)
+				return ret;
+		}
 	}
 
 	ret = regmap_read(wm8903->regmap, WM8903_SW_RESET_AND_ID, &val);