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

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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>
This commit is contained in:
Chander Kashyap 2012-09-21 05:42:08 +00:00 committed by Chris Ball
parent 9cde5b7a49
commit 2abeb5c5de
1 changed files with 27 additions and 2 deletions
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29
drivers/mmc/host/sdhci-s3c.c
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@ -637,7 +637,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
goto err_no_busclks; goto err_no_busclks;
} }
#ifndef CONFIG_PM_RUNTIME
clk_enable(sc->clk_bus[sc->cur_clk]); clk_enable(sc->clk_bus[sc->cur_clk]);
#endif
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
host->ioaddr = devm_request_and_ioremap(&pdev->dev, res); 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)) gpio_is_valid(pdata->ext_cd_gpio))
sdhci_s3c_setup_card_detect_gpio(sc); sdhci_s3c_setup_card_detect_gpio(sc);
#ifdef CONFIG_PM_RUNTIME
clk_disable(sc->clk_io);
#endif
return 0; return 0;
err_req_regs: err_req_regs:
#ifndef CONFIG_PM_RUNTIME
clk_disable(sc->clk_bus[sc->cur_clk]); clk_disable(sc->clk_bus[sc->cur_clk]);
#endif
for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
if (sc->clk_bus[ptr]) { if (sc->clk_bus[ptr]) {
clk_put(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)) if (gpio_is_valid(sc->ext_cd_gpio))
gpio_free(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); sdhci_remove_host(host, 1);
pm_runtime_dont_use_autosuspend(&pdev->dev); pm_runtime_dont_use_autosuspend(&pdev->dev);
pm_runtime_disable(&pdev->dev); pm_runtime_disable(&pdev->dev);
#ifndef CONFIG_PM_RUNTIME
clk_disable(sc->clk_bus[sc->cur_clk]); clk_disable(sc->clk_bus[sc->cur_clk]);
#endif
for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
if (sc->clk_bus[ptr]) { if (sc->clk_bus[ptr]) {
clk_put(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) static int sdhci_s3c_runtime_suspend(struct device *dev)
{ {
struct sdhci_host *host = dev_get_drvdata(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) static int sdhci_s3c_runtime_resume(struct device *dev)
{ {
struct sdhci_host *host = dev_get_drvdata(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 #endif