On 2018/3/29 13:48, naranimanish@xxxxxxxxx wrote:
From: Manish Narani <mnarani@xxxxxxxxxx> This patch adds runtime PM support in Arasan SD driver. Signed-off-by: Manish Narani <mnarani@xxxxxxxxxx> --- drivers/mmc/host/sdhci-of-arasan.c | 83 +++++++++++++++++++++++++++++++++++++- 1 file changed, 81 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index c33a5f7..47196b5 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -23,6 +23,7 @@ #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of_device.h> +#include <linux/pm_runtime.h> #include <linux/phy/phy.h> #include <linux/regmap.h> #include <linux/of.h> @@ -349,6 +350,75 @@ static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = { SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN, };+#ifdef CONFIG_PM+/** + * sdhci_arasan_runtime_suspend - Suspend method for the driver + * @dev: Address of the device structure + * Returns 0 on success and error value on error + * + * Put the device in a low power state. + */ +static int sdhci_arasan_runtime_suspend(struct device *dev) +{
Would you help take care of cqhci_suspend?
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
+ ret = sdhci_runtime_suspend_host(host);
+ if (ret)
+ return ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ clk_disable(pltfm_host->clk);
+ clk_disable(sdhci_arasan->clk_ahb);
+
+ return 0;
+}
+
+/**
+ * sdhci_arasan_runtime_resume - Resume method for the driver
+ * @dev: Address of the device structure
+ * Returns 0 on success and error value on error
+ *
+ * Resume operation after suspend
+ */
+static int sdhci_arasan_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
Ditto, for cqhci_resume.
+ ret = clk_enable(sdhci_arasan->clk_ahb); + if (ret) { + dev_err(dev, "Cannot enable AHB clock.\n"); + return ret; + } + + ret = clk_enable(pltfm_host->clk); + if (ret) { + dev_err(dev, "Cannot enable SD clock.\n"); + return ret; + } + + ret = sdhci_runtime_resume_host(host); + if (ret) + goto out; + + return 0; +out: + clk_disable(pltfm_host->clk); + clk_disable(sdhci_arasan->clk_ahb); + + return ret; +} +#endif /* ! CONFIG_PM */ + #ifdef CONFIG_PM_SLEEP /** * sdhci_arasan_suspend - Suspend method for the driver @@ -443,8 +513,11 @@ static int sdhci_arasan_resume(struct device *dev) } #endif /* ! CONFIG_PM_SLEEP */-static SIMPLE_DEV_PM_OPS(sdhci_arasan_dev_pm_ops, sdhci_arasan_suspend,- sdhci_arasan_resume); +static const struct dev_pm_ops sdhci_arasan_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(sdhci_arasan_suspend, sdhci_arasan_resume) + SET_RUNTIME_PM_OPS(sdhci_arasan_runtime_suspend, + sdhci_arasan_runtime_resume, NULL) +};static const struct of_device_id sdhci_arasan_of_match[] = {/* SoC-specific compatible strings w/ soc_ctl_map */ @@ -806,6 +879,12 @@ static int sdhci_arasan_probe(struct platform_device *pdev) if (ret) goto err_add_host;+ pm_runtime_set_active(&pdev->dev);+ pm_runtime_enable(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_use_autosuspend(&pdev->dev); + return 0;err_add_host:
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