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authorNicolin Chen <b42378@freescale.com>2013-06-07 07:23:27 +0400
committerMark Brown <broonie@linaro.org>2013-06-07 13:35:17 +0400
commitd74e9e7090aeb9b61e683e5abf7ca70fa18f846b (patch)
treecea29a98bbf9de15c633d5567145d253246e1c85
parente75a52c6723a61a0d768ee53794e86b7edbe54f0 (diff)
downloadlinux-d74e9e7090aeb9b61e683e5abf7ca70fa18f846b.tar.xz
ASoC: wm8962: Add device tree binding
Document the device tree binding for the WM8962 codec, and modify the driver to extract platform data from the device tree, if present. Based on work of WM8903 by Stephen Warren <swarren@nvidia.com> Signed-off-by: Nicolin Chen <b42378@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
-rw-r--r--Documentation/devicetree/bindings/sound/wm8962.txt23
-rw-r--r--sound/soc/codecs/wm8962.c35
2 files changed, 57 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/sound/wm8962.txt b/Documentation/devicetree/bindings/sound/wm8962.txt
index dceb3b1c2bb7..7f82b59ec8f9 100644
--- a/Documentation/devicetree/bindings/sound/wm8962.txt
+++ b/Documentation/devicetree/bindings/sound/wm8962.txt
@@ -8,9 +8,32 @@ Required properties:
- reg : the I2C address of the device.
+Optional properties:
+ - spk-mono: This is a boolean property. If present, the SPK_MONO bit
+ of R51 (Class D Control 2) gets set, indicating that the speaker is
+ in mono mode.
+
+ - mic-cfg : Default register value for R48 (Additional Control 4).
+ If absent, the default should be the register default.
+
+ - gpio-cfg : A list of GPIO configuration register values. The list must
+ be 6 entries long. If absent, no configuration of these registers is
+ performed. And note that only the value within [0x0, 0xffff] is valid.
+ Any other value is regarded as setting the GPIO register by its reset
+ value 0x0.
+
Example:
codec: wm8962@1a {
compatible = "wlf,wm8962";
reg = <0x1a>;
+
+ gpio-cfg = <
+ 0x0000 /* 0:Default */
+ 0x0000 /* 1:Default */
+ 0x0013 /* 2:FN_DMICCLK */
+ 0x0000 /* 3:Default */
+ 0x8014 /* 4:FN_DMICCDAT */
+ 0x0000 /* 5:Default */
+ >;
};
diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index d56dd867057d..26219ea2bbb5 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -3584,6 +3584,34 @@ static const struct regmap_config wm8962_regmap = {
.cache_type = REGCACHE_RBTREE,
};
+static int wm8962_set_pdata_from_of(struct i2c_client *i2c,
+ struct wm8962_pdata *pdata)
+{
+ const struct device_node *np = i2c->dev.of_node;
+ u32 val32;
+ int i;
+
+ if (of_property_read_bool(np, "spk-mono"))
+ pdata->spk_mono = true;
+
+ if (of_property_read_u32(np, "mic-cfg", &val32) >= 0)
+ pdata->mic_cfg = val32;
+
+ if (of_property_read_u32_array(np, "gpio-cfg", pdata->gpio_init,
+ ARRAY_SIZE(pdata->gpio_init)) >= 0)
+ for (i = 0; i < ARRAY_SIZE(pdata->gpio_init); i++) {
+ /*
+ * The range of GPIO register value is [0x0, 0xffff]
+ * While the default value of each register is 0x0
+ * Any other value will be regarded as default value
+ */
+ if (pdata->gpio_init[i] > 0xffff)
+ pdata->gpio_init[i] = 0x0;
+ }
+
+ return 0;
+}
+
static int wm8962_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -3604,8 +3632,13 @@ static int wm8962_i2c_probe(struct i2c_client *i2c,
wm8962->irq = i2c->irq;
/* If platform data was supplied, update the default data in priv */
- if (pdata)
+ if (pdata) {
memcpy(&wm8962->pdata, pdata, sizeof(struct wm8962_pdata));
+ } else if (i2c->dev.of_node) {
+ ret = wm8962_set_pdata_from_of(i2c, &wm8962->pdata);
+ if (ret != 0)
+ return ret;
+ }
for (i = 0; i < ARRAY_SIZE(wm8962->supplies); i++)
wm8962->supplies[i].supply = wm8962_supply_names[i];