diff options
| author | Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> | 2015-12-05 00:40:31 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-12-07 20:52:02 +0100 |
| commit | f48303122d2fd94b719e546cf8a39d412c7eee69 (patch) | |
| tree | f57a5429b0ef2e8f08e8d601c42fa55bea5c6186 /sound | |
| parent | Linux 4.4-rc1 (diff) | |
| download | linux-f48303122d2fd94b719e546cf8a39d412c7eee69.tar.xz linux-f48303122d2fd94b719e546cf8a39d412c7eee69.zip | |
ASoC: dwc: add runtime suspend/resume functionality
When DW controller is in master mode, it can disable/enable clock
during the device runtime suspend/resume sequence.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/dwc/designware_i2s.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c index 6e6a70c5c2bd..3d7754c115ec 100644 --- a/sound/soc/dwc/designware_i2s.c +++ b/sound/soc/dwc/designware_i2s.c @@ -18,6 +18,7 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include <sound/designware_i2s.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -394,6 +395,23 @@ static const struct snd_soc_component_driver dw_i2s_component = { }; #ifdef CONFIG_PM +static int dw_i2s_runtime_suspend(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + + if (dw_dev->capability & DW_I2S_MASTER) + clk_disable(dw_dev->clk); + return 0; +} + +static int dw_i2s_runtime_resume(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + + if (dw_dev->capability & DW_I2S_MASTER) + clk_enable(dw_dev->clk); + return 0; +} static int dw_i2s_suspend(struct snd_soc_dai *dai) { @@ -649,7 +667,7 @@ static int dw_i2s_probe(struct platform_device *pdev) goto err_clk_disable; } } - + pm_runtime_enable(&pdev->dev); return 0; err_clk_disable: @@ -665,6 +683,7 @@ static int dw_i2s_remove(struct platform_device *pdev) if (dev->capability & DW_I2S_MASTER) clk_disable_unprepare(dev->clk); + pm_runtime_disable(&pdev->dev); return 0; } @@ -677,12 +696,17 @@ static const struct of_device_id dw_i2s_of_match[] = { MODULE_DEVICE_TABLE(of, dw_i2s_of_match); #endif +static const struct dev_pm_ops dwc_pm_ops = { + SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL) +}; + static struct platform_driver dw_i2s_driver = { .probe = dw_i2s_probe, .remove = dw_i2s_remove, .driver = { .name = "designware-i2s", .of_match_table = of_match_ptr(dw_i2s_of_match), + .pm = &dwc_pm_ops, }, }; |