ASoC: img-i2s-in: Add runtime PM
Add runtime PM to disable the clock when the device is not in use. The ASoC core takes care of the pm_runtime_get_sync / put calls so we just need to provide runtime_suspend / runtime_resume functions and enable runtime PM. Signed-off-by: Ed Blake <ed.blake@sondrel.com> Signed-off-by: Mark Brown <broonie@kernel.org>hifive-unleashed-5.1
Ed Blake
Mark Brown
parent
8ab7f885da
commit
f65bb92ca1
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@ -16,6 +16,7 @@
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <sound/core.h>
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@ -64,6 +65,29 @@ struct img_i2s_in {
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u32 *suspend_ch_ctl;
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};
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static int img_i2s_in_runtime_suspend(struct device *dev)
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{
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struct img_i2s_in *i2s = dev_get_drvdata(dev);
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clk_disable_unprepare(i2s->clk_sys);
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return 0;
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}
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static int img_i2s_in_runtime_resume(struct device *dev)
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{
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struct img_i2s_in *i2s = dev_get_drvdata(dev);
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int ret;
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ret = clk_prepare_enable(i2s->clk_sys);
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if (ret) {
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dev_err(dev, "Unable to enable sys clock\n");
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return ret;
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}
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return 0;
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}
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static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg)
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{
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writel(val, i2s->base + reg);
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@ -281,7 +305,7 @@ static int img_i2s_in_hw_params(struct snd_pcm_substream *substream,
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static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai);
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int i;
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int i, ret;
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u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0;
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u32 reg;
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@ -321,6 +345,10 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK;
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ret = pm_runtime_get_sync(i2s->dev);
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if (ret < 0)
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return ret;
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for (i = 0; i < i2s->active_channels; i++)
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img_i2s_in_ch_disable(i2s, i);
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@ -340,6 +368,8 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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for (i = 0; i < i2s->active_channels; i++)
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img_i2s_in_ch_enable(i2s, i);
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pm_runtime_put(i2s->dev);
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return 0;
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}
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@ -429,9 +459,15 @@ static int img_i2s_in_probe(struct platform_device *pdev)
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return PTR_ERR(i2s->clk_sys);
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}
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ret = clk_prepare_enable(i2s->clk_sys);
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if (ret)
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return ret;
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pm_runtime_enable(&pdev->dev);
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if (!pm_runtime_enabled(&pdev->dev)) {
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ret = img_i2s_in_runtime_resume(&pdev->dev);
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if (ret)
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goto err_pm_disable;
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}
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ret = pm_runtime_get_sync(&pdev->dev);
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if (ret < 0)
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goto err_suspend;
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i2s->active_channels = 1;
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i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO;
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@ -449,7 +485,7 @@ static int img_i2s_in_probe(struct platform_device *pdev)
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if (IS_ERR(rst)) {
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if (PTR_ERR(rst) == -EPROBE_DEFER) {
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ret = -EPROBE_DEFER;
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goto err_clk_disable;
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goto err_suspend;
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}
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dev_dbg(dev, "No top level reset found\n");
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@ -471,35 +507,40 @@ static int img_i2s_in_probe(struct platform_device *pdev)
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IMG_I2S_IN_CH_CTL_JUST_MASK |
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IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL);
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pm_runtime_put(&pdev->dev);
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i2s->suspend_ch_ctl = devm_kzalloc(dev,
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sizeof(*i2s->suspend_ch_ctl) * i2s->max_i2s_chan, GFP_KERNEL);
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if (!i2s->suspend_ch_ctl) {
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ret = -ENOMEM;
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goto err_clk_disable;
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goto err_suspend;
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}
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ret = devm_snd_soc_register_component(dev, &img_i2s_in_component,
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&i2s->dai_driver, 1);
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if (ret)
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goto err_clk_disable;
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goto err_suspend;
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ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0);
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if (ret)
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goto err_clk_disable;
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goto err_suspend;
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return 0;
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err_clk_disable:
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clk_disable_unprepare(i2s->clk_sys);
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err_suspend:
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if (!pm_runtime_enabled(&pdev->dev))
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img_i2s_in_runtime_suspend(&pdev->dev);
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err_pm_disable:
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pm_runtime_disable(&pdev->dev);
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return ret;
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}
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static int img_i2s_in_dev_remove(struct platform_device *pdev)
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{
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struct img_i2s_in *i2s = platform_get_drvdata(pdev);
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clk_disable_unprepare(i2s->clk_sys);
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pm_runtime_disable(&pdev->dev);
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if (!pm_runtime_status_suspended(&pdev->dev))
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img_i2s_in_runtime_suspend(&pdev->dev);
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return 0;
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}
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@ -508,9 +549,15 @@ static int img_i2s_in_dev_remove(struct platform_device *pdev)
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static int img_i2s_in_suspend(struct device *dev)
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{
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struct img_i2s_in *i2s = dev_get_drvdata(dev);
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int i;
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int i, ret;
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u32 reg;
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if (pm_runtime_status_suspended(dev)) {
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ret = img_i2s_in_runtime_resume(dev);
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if (ret)
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return ret;
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}
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for (i = 0; i < i2s->max_i2s_chan; i++) {
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reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL);
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i2s->suspend_ch_ctl[i] = reg;
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@ -518,7 +565,7 @@ static int img_i2s_in_suspend(struct device *dev)
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i2s->suspend_ctl = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL);
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clk_disable_unprepare(i2s->clk_sys);
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img_i2s_in_runtime_suspend(dev);
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return 0;
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}
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@ -526,10 +573,12 @@ static int img_i2s_in_suspend(struct device *dev)
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static int img_i2s_in_resume(struct device *dev)
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{
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struct img_i2s_in *i2s = dev_get_drvdata(dev);
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int i;
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int i, ret;
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u32 reg;
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clk_prepare_enable(i2s->clk_sys);
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ret = img_i2s_in_runtime_resume(dev);
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if (ret)
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return ret;
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for (i = 0; i < i2s->max_i2s_chan; i++) {
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reg = i2s->suspend_ch_ctl[i];
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@ -538,6 +587,9 @@ static int img_i2s_in_resume(struct device *dev)
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img_i2s_in_writel(i2s, i2s->suspend_ctl, IMG_I2S_IN_CTL);
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if (pm_runtime_status_suspended(dev))
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img_i2s_in_runtime_suspend(dev);
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return 0;
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}
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#endif
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@ -549,6 +601,8 @@ static const struct of_device_id img_i2s_in_of_match[] = {
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MODULE_DEVICE_TABLE(of, img_i2s_in_of_match);
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static const struct dev_pm_ops img_i2s_in_pm_ops = {
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SET_RUNTIME_PM_OPS(img_i2s_in_runtime_suspend,
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img_i2s_in_runtime_resume, NULL)
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SET_SYSTEM_SLEEP_PM_OPS(img_i2s_in_suspend, img_i2s_in_resume)
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};
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