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ASoC: fsl: add sgtl5000 clock support for imx-sgtl5000 

It tries to clk_get the clock. And if it failed, it assumes the clock
by default enabled.

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Richard Zhao 2012-04-27 15:02:57 +08:00 committed by Mark Brown
parent 717071dc27
commit 81e8e49261
1 changed files with 32 additions and 8 deletions
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40
sound/soc/fsl/imx-sgtl5000.c
View File

@ -13,6 +13,8 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_i2c.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include "../codecs/sgtl5000.h"
@ -25,6 +27,7 @@ struct imx_sgtl5000_data {
struct snd_soc_card card;
char codec_dai_name[DAI_NAME_SIZE];
char platform_name[DAI_NAME_SIZE];
struct clk *codec_clk;
unsigned int clk_frequency;
};
@ -58,6 +61,7 @@ static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct device_node *ssi_np, *codec_np;
struct platform_device *ssi_pdev;
struct i2c_client *codec_dev;
struct imx_sgtl5000_data *data;
int int_port, ext_port;
int ret;
@ -113,6 +117,11 @@ static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
ret = -EINVAL;
goto fail;
}
codec_dev = of_find_i2c_device_by_node(codec_np);
if (!codec_dev) {
dev_err(&pdev->dev, "failed to find codec platform device\n");
return -EINVAL;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
@ -120,11 +129,20 @@ static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
goto fail;
}
ret = of_property_read_u32(codec_np, "clock-frequency",
&data->clk_frequency);
if (ret) {
dev_err(&pdev->dev, "clock-frequency missing or invalid\n");
goto fail;
data->codec_clk = clk_get(&codec_dev->dev, NULL);
if (IS_ERR(data->codec_clk)) {
/* assuming clock enabled by default */
data->codec_clk = NULL;
ret = of_property_read_u32(codec_np, "clock-frequency",
&data->clk_frequency);
if (ret) {
dev_err(&codec_dev->dev,
"clock-frequency missing or invalid\n");
goto fail;
}
} else {
data->clk_frequency = clk_get_rate(data->codec_clk);
clk_prepare_enable(data->codec_clk);
}
data->dai.name = "HiFi";
@ -140,10 +158,10 @@ static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
data->card.dev = &pdev->dev;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
goto clk_fail;
ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
if (ret)
goto fail;
goto clk_fail;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
@ -152,10 +170,12 @@ static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
ret = snd_soc_register_card(&data->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
goto fail;
goto clk_fail;
}
platform_set_drvdata(pdev, data);
clk_fail:
clk_put(data->codec_clk);
fail:
if (ssi_np)
of_node_put(ssi_np);
@ -169,6 +189,10 @@ static int __devexit imx_sgtl5000_remove(struct platform_device *pdev)
{
struct imx_sgtl5000_data *data = platform_get_drvdata(pdev);
if (data->codec_clk) {
clk_disable_unprepare(data->codec_clk);
clk_put(data->codec_clk);
}
snd_soc_unregister_card(&data->card);
return 0;