[PATCH] sound/tlv320dac33: Add device tree support

Pavel Machek
2018-01-29T23:05:39Z

[-- Attachment #1: Type: text/plain, Size: 4395 bytes --]

This adds device tree support to tlv320dac33.c.

Signed-off-by: Pavel Machek <pavel@ucw.cz>

diff --git a/Documentation/devicetree/bindings/sound/tlv320dac33.txt b/Documentation/devicetree/bindings/sound/tlv320dac33.txt
new file mode 100644
index 0000000..6cbd311
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/tlv320dac33.txt
@@ -0,0 +1,32 @@
+Texas Instruments - tlv320dac33 Codec module
+
+The tlv320dac33 serial control bus communicates through I2C protocols.
+
+Required properties:
+
+- compatible - "ti,tlv320dac33"
+- reg - I2C slave address
+
+Optional properties:
+
+- power-gpios - gpio pin to power the device, active high
+
+- interrupts - The interrupt output from the device.
+- interrupt-parent - The parent interrupt controller.
+
+- ti,keep-bclk - Keep the BCLK running in FIFO modes
+- ti,burst-bclkdiv - BCLK divider value in burst mode
+
+Example:
+
+tlv320dac33: audio-codec@19 {
+ compatible = "ti,tlv320dac33";
+ reg = <0x19>;
+
+ interrupt-parent = <&gpio2>;
+ interrupts = <21 1>; /* gpio_53, IRQF_TRIGGER_RISING */
+ power-gpio = <&gpio2 28 0>; /* gpio_60 */
+
+ ti,keep-bclk;
+ ti,burst-bclkdiv = <3>;
+};
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 5b94a15..2a0fe06 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -30,6 +32,7 @@
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
+#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -105,7 +108,7 @@ struct tlv320dac33_priv {
unsigned int nsample; /* burst read amount from host */
int mode1_latency; /* latency caused by the i2c writes in
* us */
- u8 burst_bclkdiv; /* BCLK divider value in burst mode */
+ u32 burst_bclkdiv; /* BCLK divider value in burst mode */
unsigned int burst_rate; /* Interface speed in Burst modes */

int keep_bclk; /* Keep the BCLK continuously running
@@ -1484,16 +1487,11 @@ static struct snd_soc_dai_driver dac33_dai = {
static int dac33_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct tlv320dac33_platform_data *pdata;
+ struct tlv320dac33_platform_data *pdata = client->dev.platform_data;
struct tlv320dac33_priv *dac33;
+ struct device_node *np = client->dev.of_node;
int ret, i;

- if (client->dev.platform_data == NULL) {
- dev_err(&client->dev, "Platform data not set\n");
- return -ENODEV;
- }
- pdata = client->dev.platform_data;
-
dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
GFP_KERNEL);
if (dac33 == NULL)
@@ -1505,10 +1503,26 @@ static int dac33_i2c_probe(struct i2c_client *client,

i2c_set_clientdata(client, dac33);

- dac33->power_gpio = pdata->power_gpio;
- dac33->burst_bclkdiv = pdata->burst_bclkdiv;
- dac33->keep_bclk = pdata->keep_bclk;
- dac33->mode1_latency = pdata->mode1_latency;
+ if (pdata) {
+ dac33->power_gpio = pdata->power_gpio;
+ dac33->burst_bclkdiv = pdata->burst_bclkdiv;
+ dac33->keep_bclk = pdata->keep_bclk;
+ dac33->mode1_latency = pdata->mode1_latency;
+ } else if (np) {
+ ret = of_get_named_gpio(np, "power-gpios", 0);
+ if (ret >= 0)
+ dac33->power_gpio = ret;
+ else
+ dac33->power_gpio = -1;
+
+ if (of_property_read_bool(np, "ti,keep-bclk"))
+ dac33->keep_bclk = true;
+
+ of_property_read_u32(np, "ti,burst-bclkdiv", &dac33->burst_bclkdiv);
+ } else {
+ dev_err(&client->dev, "Platform data not set\n");
+ return -ENODEV;
+ }
if (!dac33->mode1_latency)
dac33->mode1_latency = 10000; /* 10ms */
dac33->irq = client->irq;
@@ -1574,9 +1588,16 @@ static const struct i2c_device_id tlv320dac33_i2c_id[] = {
};
MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);

+static const struct of_device_id tlv320dac33_of_match[] = {
+ { .compatible = "ti,tlv320dac33", },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, tlv320dac33_of_match);
+
static struct i2c_driver tlv320dac33_i2c_driver = {
.driver = {
.name = "tlv320dac33-codec",
+ .of_match_table = of_match_ptr(tlv320dac33_of_match),
},
.probe = dac33_i2c_probe,
.remove = dac33_i2c_remove,

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 181 bytes --]