The patch
ASoC: dwc: add runtime suspend/resume functionality
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From f48303122d2fd94b719e546cf8a39d412c7eee69 Mon Sep 17 00:00:00 2001
From: Maruthi Srinivas Bayyavarapu Maruthi.Bayyavarapu@amd.com 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 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 --- 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 <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, }, };