mmc: sdhci-s3c: Add clk_(enable/disable) in runtime suspend/resume

Perform clock disable/enable in runtime suspend/resume.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 27 insertions, 2 deletions

diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index e0196726b132..2903949594c6 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -637,7 +637,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
                 goto err_no_busclks;
         }
 
+#ifndef CONFIG_PM_RUNTIME
         clk_enable(sc->clk_bus[sc->cur_clk]);
+#endif
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         host->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
@@ -744,10 +746,15 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
             gpio_is_valid(pdata->ext_cd_gpio))
                 sdhci_s3c_setup_card_detect_gpio(sc);
 
+#ifdef CONFIG_PM_RUNTIME
+        clk_disable(sc->clk_io);
+#endif
         return 0;
 
  err_req_regs:
+#ifndef CONFIG_PM_RUNTIME
         clk_disable(sc->clk_bus[sc->cur_clk]);
+#endif
         for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
                 if (sc->clk_bus[ptr]) {
                         clk_put(sc->clk_bus[ptr]);
@@ -786,12 +793,17 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
         if (gpio_is_valid(sc->ext_cd_gpio))
                 gpio_free(sc->ext_cd_gpio);
 
+#ifdef CONFIG_PM_RUNTIME
+        clk_enable(sc->clk_io);
+#endif
         sdhci_remove_host(host, 1);
 
         pm_runtime_dont_use_autosuspend(&pdev->dev);
         pm_runtime_disable(&pdev->dev);
 
+#ifndef CONFIG_PM_RUNTIME
         clk_disable(sc->clk_bus[sc->cur_clk]);
+#endif
         for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
                 if (sc->clk_bus[ptr]) {
                         clk_put(sc->clk_bus[ptr]);
@@ -831,15 +843,28 @@ static int sdhci_s3c_resume(struct device *dev)
 static int sdhci_s3c_runtime_suspend(struct device *dev)
 {
         struct sdhci_host *host = dev_get_drvdata(dev);
+        struct sdhci_s3c *ourhost = to_s3c(host);
+        struct clk *busclk = ourhost->clk_io;
+        int ret;
+
+        ret = sdhci_runtime_suspend_host(host);
 
-        return sdhci_runtime_suspend_host(host);
+        clk_disable(ourhost->clk_bus[ourhost->cur_clk]);
+        clk_disable(busclk);
+        return ret;
 }
 
 static int sdhci_s3c_runtime_resume(struct device *dev)
 {
         struct sdhci_host *host = dev_get_drvdata(dev);
+        struct sdhci_s3c *ourhost = to_s3c(host);
+        struct clk *busclk = ourhost->clk_io;
+        int ret;
 
-        return sdhci_runtime_resume_host(host);
+        clk_enable(busclk);
+        clk_enable(ourhost->clk_bus[ourhost->cur_clk]);
+        ret = sdhci_runtime_resume_host(host);
+        return ret;
 }
 #endif