From f48303122d2fd94b719e546cf8a39d412c7eee69 Mon Sep 17 00:00:00 2001 From: Maruthi Srinivas Bayyavarapu Date: Fri, 4 Dec 2015 18:40:31 -0500 Subject: [PATCH] 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 Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher Signed-off-by: Mark Brown --- sound/soc/dwc/designware_i2s.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) 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 #include #include +#include #include #include #include @@ -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, }, }; -- 2.20.1