[alsa-devel] [PATCH v2 2/2] ASoC: rt5645: add device tree support
Bard Liao
bardliao at realtek.com
Fri May 29 12:16:47 CEST 2015
Modify the RT5645 driver to parse platform data from device tree.
Write a DT binding document to describe those properties.
Signed-off-by: Bard Liao <bardliao at realtek.com>
---
* Change of_property_ APIs to device_property_ APIs
---
Documentation/devicetree/bindings/sound/rt5645.txt | 68 ++++++++++++++++++++++
sound/soc/codecs/rt5645.c | 16 +++++
2 files changed, 84 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/rt5645.txt
diff --git a/Documentation/devicetree/bindings/sound/rt5645.txt b/Documentation/devicetree/bindings/sound/rt5645.txt
new file mode 100644
index 0000000..f21e9af
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rt5645.txt
@@ -0,0 +1,68 @@
+RT5650/RT5645 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+- compatible : One of "realtek,rt5645" or "realtek,rt5650".
+
+- reg : The I2C address of the device.
+
+- interrupts : The CODEC's interrupt output.
+
+Optional properties:
+
+- realtek,in2-differential
+ Boolean. Indicate MIC2 input are differential, rather than single-ended.
+
+- realtek,dmic1-data-pin
+ 0: dmic1 is not used
+ 1: using IN2P pin as dmic1 data pin
+ 2: using GPIO6 pin as dmic1 data pin
+ 3: using GPIO10 pin as dmic1 data pin
+ 4: using GPIO12 pin as dmic1 data pin
+
+- realtek,dmic2-data-pin
+ 0: dmic2 is not used
+ 1: using IN2N pin as dmic2 data pin
+ 2: using GPIO5 pin as dmic2 data pin
+ 3: using GPIO11 pin as dmic2 data pin
+
+-- realtek,jd-mode : The JD mode of rt5645/rt5650
+ 0 : rt5645/rt5650 JD function is not used
+ 1 : Mode-0 (VDD=3.3V), two port jack detection
+ 2 : Mode-1 (VDD=3.3V), one port jack detection
+ 3 : Mode-2 (VDD=1.8V), one port jack detection
+
+Pins on the device (for linking into audio routes) for RT5645/RT5650:
+
+ * DMIC L1
+ * DMIC R1
+ * DMIC L2
+ * DMIC R2
+ * IN1P
+ * IN1N
+ * IN2P
+ * IN2N
+ * Haptic Generator
+ * HPOL
+ * HPOR
+ * LOUTL
+ * LOUTR
+ * PDM1L
+ * PDM1R
+ * SPOL
+ * SPOR
+
+Example:
+
+codec: rt5650 at 1a {
+ compatible = "realtek,rt5650";
+ reg = <0x1a>;
+ rt5645-gpios = <&gpio 19 0>;
+ interrupt-parent = <&gpio>;
+ interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+ realtek,dmic-en = "true";
+ realtek,en-jd-func = "true";
+ realtek,jd-mode = <3>;
+};
\ No newline at end of file
diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 0cb4942..76b1efd 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3225,6 +3225,20 @@ static struct dmi_system_id dmi_platform_intel_braswell[] = {
{ }
};
+static int rt5645_parse_dt(struct rt5645_priv *rt5645, struct device_node *np)
+{
+ rt5645->pdata.in2_diff = device_property_read_bool(np,
+ "realtek,in2-differential");
+ device_property_read_u32(np,
+ "realtek,dmic1-data-pin", &rt5645->pdata.dmic1_data_pin);
+ device_property_read_u32(np,
+ "realtek,dmic2-data-pin", &rt5645->pdata.dmic2_data_pin);
+ device_property_read_u32(np,
+ "realtek,jd-mode", &rt5645->pdata.jd_mode);
+
+ return 0;
+}
+
static int rt5645_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -3244,6 +3258,8 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
if (pdata) {
rt5645->pdata = *pdata;
+ } else if (i2c->dev.of_node) {
+ rt5645_parse_dt(rt5645, i2c->dev.of_node);
} else {
if (dmi_check_system(dmi_platform_intel_braswell)) {
rt5645->pdata = *rt5645_pdata;
--
1.8.1.1.439.g50a6b54
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