diff options
author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2013-11-14 10:35:35 +0100 |
---|---|---|
committer | Mark Brown <broonie@linaro.org> | 2013-12-10 12:22:25 +0100 |
commit | ae726e93946403b14f8cad20d5cbd22d015c9106 (patch) | |
tree | 770860c5e35e97e0ec6a0f2ff9b7b0a1be42293c /sound/soc/davinci | |
parent | ASoC: davinci-mcasp: Correct am33xx snd_platform_data name (diff) | |
download | linux-ae726e93946403b14f8cad20d5cbd22d015c9106.tar.xz linux-ae726e93946403b14f8cad20d5cbd22d015c9106.zip |
ASoC: davinci-mcasp: Support for fck reparenting
Optional DT property to specify the desired parent clock for the McASP fck
clock.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/davinci')
-rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 8ec879548488..b7858bfa0295 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -21,6 +21,7 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/clk.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_platform.h> @@ -823,6 +824,46 @@ static const struct of_device_id mcasp_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, mcasp_dt_ids); +static int mcasp_reparent_fck(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct clk *gfclk, *parent_clk; + const char *parent_name; + int ret; + + if (!node) + return 0; + + parent_name = of_get_property(node, "fck_parent", NULL); + if (!parent_name) + return 0; + + gfclk = clk_get(&pdev->dev, "fck"); + if (IS_ERR(gfclk)) { + dev_err(&pdev->dev, "failed to get fck\n"); + return PTR_ERR(gfclk); + } + + parent_clk = clk_get(NULL, parent_name); + if (IS_ERR(parent_clk)) { + dev_err(&pdev->dev, "failed to get parent clock\n"); + ret = PTR_ERR(parent_clk); + goto err1; + } + + ret = clk_set_parent(gfclk, parent_clk); + if (ret) { + dev_err(&pdev->dev, "failed to reparent fck\n"); + goto err2; + } + +err2: + clk_put(parent_clk); +err1: + clk_put(gfclk); + return ret; +} + static struct snd_platform_data *davinci_mcasp_set_pdata_from_of( struct platform_device *pdev) { @@ -1052,6 +1093,9 @@ static int davinci_mcasp_probe(struct platform_device *pdev) mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = "rx"; dev_set_drvdata(&pdev->dev, mcasp); + + mcasp_reparent_fck(pdev); + ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component, &davinci_mcasp_dai[pdata->op_mode], 1); |