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ASoC: omap: rx51: Add DT support 

This patch adds device tree support to the Nokia N900 audio driver and
adds documentation for the DT binding.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Sebastian Reichel 2014-04-28 16:07:26 +02:00 committed by Mark Brown
parent f29b542183
commit d052a3d6a7
2 changed files with 80 additions and 0 deletions
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27
Documentation/devicetree/bindings/sound/nokia,rx51.txt Normal file
View File

@ -0,0 +1,27 @@
* Nokia N900 audio setup
Required properties:
- compatible: Should contain "nokia,n900-audio"
- nokia,cpu-dai: phandle for the McBSP node
- nokia,audio-codec: phandles for the main TLV320AIC3X node and the
auxiliary TLV320AIC3X node (in this order)
- nokia,headphone-amplifier: phandle for the TPA6130A2 node
- tvout-selection-gpios: GPIO for tvout selection
- jack-detection-gpios: GPIO for jack detection
- eci-switch-gpios: GPIO for ECI (Enhancement Control Interface) switch
- speaker-amplifier-gpios: GPIO for speaker amplifier
Example:
sound {
compatible = "nokia,n900-audio";
nokia,cpu-dai = <&mcbsp2>;
nokia,audio-codec = <&tlv320aic3x>, <&tlv320aic3x_aux>;
nokia,headphone-amplifier = <&tpa6130a2>;
tvout-selection-gpios = <&gpio2 8 GPIO_ACTIVE_HIGH>; /* 40 */
jack-detection-gpios = <&gpio6 17 GPIO_ACTIVE_HIGH>; /* 177 */
eci-switch-gpios = <&gpio6 22 GPIO_ACTIVE_HIGH>; /* 182 */
speaker-amplifier-gpios = <&twl_gpio 7 GPIO_ACTIVE_HIGH>;
};

53
sound/soc/omap/rx51.c
View File

@ -386,6 +386,7 @@ static struct snd_soc_card rx51_sound_card = {
static int rx51_soc_probe(struct platform_device *pdev)
{
struct rx51_audio_pdata *pdata;
struct device_node *np = pdev->dev.of_node;
struct snd_soc_card *card = &rx51_sound_card;
int err;
@ -394,6 +395,49 @@ static int rx51_soc_probe(struct platform_device *pdev)
card->dev = &pdev->dev;
if (np) {
struct device_node *dai_node;
dai_node = of_parse_phandle(np, "nokia,cpu-dai", 0);
if (!dai_node) {
dev_err(&pdev->dev, "McBSP node is not provided\n");
return -EINVAL;
}
rx51_dai[0].cpu_dai_name = NULL;
rx51_dai[0].platform_name = NULL;
rx51_dai[0].cpu_of_node = dai_node;
rx51_dai[0].platform_of_node = dai_node;
dai_node = of_parse_phandle(np, "nokia,audio-codec", 0);
if (!dai_node) {
dev_err(&pdev->dev, "Codec node is not provided\n");
return -EINVAL;
}
rx51_dai[0].codec_name = NULL;
rx51_dai[0].codec_of_node = dai_node;
dai_node = of_parse_phandle(np, "nokia,audio-codec", 1);
if (!dai_node) {
dev_err(&pdev->dev, "Auxiliary Codec node is not provided\n");
return -EINVAL;
}
rx51_aux_dev[0].codec_name = NULL;
rx51_aux_dev[0].codec_of_node = dai_node;
rx51_codec_conf[0].dev_name = NULL;
rx51_codec_conf[0].of_node = dai_node;
dai_node = of_parse_phandle(np, "nokia,headphone-amplifier", 0);
if (!dai_node) {
dev_err(&pdev->dev, "Headphone amplifier node is not provided\n");
return -EINVAL;
}
/* TODO: tpa6130a2a driver supports only a single instance, so
* this driver ignores the headphone-amplifier node for now.
* It's already mandatory in the DT binding to be future proof.
*/
}
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (pdata == NULL) {
dev_err(card->dev, "failed to create private data\n");
@ -463,10 +507,19 @@ static int rx51_soc_remove(struct platform_device *pdev)
return 0;
}
#if defined(CONFIG_OF)
static const struct of_device_id rx51_audio_of_match[] = {
{ .compatible = "nokia,n900-audio", },
{},
};
MODULE_DEVICE_TABLE(of, rx51_audio_of_match);
#endif
static struct platform_driver rx51_soc_driver = {
.driver = {
.name = "rx51-audio",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(rx51_audio_of_match),
},
.probe = rx51_soc_probe,
.remove = rx51_soc_remove,