diff options
| author | Hebbar, Gururaja <gururaja.hebbar@ti.com> | 2012-08-08 20:40:32 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-09 14:06:10 +0100 |
| commit | 10884347f18842aa9b8ae18ebb16272d9b7fafa2 (patch) | |
| tree | 5c76a175a657756ecdf7ad79a282f30dfa354a23 /sound/soc/davinci | |
| parent | 8f245499791a4701bfe1ce9b0df90cea9d2f13e5 (diff) | |
ASoC: McASP: Convert driver to use Runtime PM API
* Add Runtime PM support to McASP host controller.
* Use Runtime PM API to enable/disable McASP clock.
This was tested on AM18x Board using suspend/resume
Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 40 | ||||
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.h | 3 |
2 files changed, 20 insertions, 23 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 95441bfc819..d919fb8de7a 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -21,7 +21,7 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/io.h> -#include <linux/clk.h> +#include <linux/pm_runtime.h> #include <sound/core.h> #include <sound/pcm.h> @@ -776,20 +776,17 @@ static int davinci_mcasp_trigger(struct snd_pcm_substream *substream, case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - if (!dev->clk_active) { - clk_enable(dev->clk); - dev->clk_active = 1; - } + ret = pm_runtime_get_sync(dev->dev); + if (IS_ERR_VALUE(ret)) + dev_err(dev->dev, "pm_runtime_get_sync() failed\n"); davinci_mcasp_start(dev, substream->stream); break; case SNDRV_PCM_TRIGGER_SUSPEND: davinci_mcasp_stop(dev, substream->stream); - if (dev->clk_active) { - clk_disable(dev->clk); - dev->clk_active = 0; - } - + ret = pm_runtime_put_sync(dev->dev); + if (IS_ERR_VALUE(ret)) + dev_err(dev->dev, "pm_runtime_put_sync() failed\n"); break; case SNDRV_PCM_TRIGGER_STOP: @@ -886,12 +883,13 @@ static int davinci_mcasp_probe(struct platform_device *pdev) } pdata = pdev->dev.platform_data; - dev->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(dev->clk)) - return -ENODEV; + pm_runtime_enable(&pdev->dev); - clk_enable(dev->clk); - dev->clk_active = 1; + ret = pm_runtime_get_sync(&pdev->dev); + if (IS_ERR_VALUE(ret)) { + dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n"); + return ret; + } dev->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); if (!dev->base) { @@ -908,6 +906,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev) dev->version = pdata->version; dev->txnumevt = pdata->txnumevt; dev->rxnumevt = pdata->rxnumevt; + dev->dev = &pdev->dev; dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]; dma_data->asp_chan_q = pdata->asp_chan_q; @@ -949,19 +948,18 @@ static int davinci_mcasp_probe(struct platform_device *pdev) return 0; err_release_clk: - clk_disable(dev->clk); - clk_put(dev->clk); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); return ret; } static int davinci_mcasp_remove(struct platform_device *pdev) { - struct davinci_audio_dev *dev = dev_get_drvdata(&pdev->dev); snd_soc_unregister_dai(&pdev->dev); - clk_disable(dev->clk); - clk_put(dev->clk); - dev->clk = NULL; + + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); return 0; } diff --git a/sound/soc/davinci/davinci-mcasp.h b/sound/soc/davinci/davinci-mcasp.h index 4681acc6360..51479f9ee90 100644 --- a/sound/soc/davinci/davinci-mcasp.h +++ b/sound/soc/davinci/davinci-mcasp.h @@ -40,9 +40,8 @@ struct davinci_audio_dev { struct davinci_pcm_dma_params dma_params[2]; void __iomem *base; int sample_rate; - struct clk *clk; + struct device *dev; unsigned int codec_fmt; - u8 clk_active; /* McASP specific data */ int tdm_slots; |