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>
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index e019672..2903949 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -637,7 +637,9 @@
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 @@
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 @@
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_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;
- return sdhci_runtime_suspend_host(host);
+ ret = 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