| Message ID | 1347613731-29428-4-git-send-email-chander.kashyap@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
Hi Jaehoon, Girish, On Fri, Sep 14 2012, Chander Kashyap wrote: > Perform clock disable/enable in runtime suspend/resume. > > Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> > --- > drivers/mmc/host/sdhci-s3c.c | 25 +++++++++++++++++++++++-- > 1 file changed, 23 insertions(+), 2 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c > index 3f4518d..ffffd51 100644 > --- a/drivers/mmc/host/sdhci-s3c.c > +++ b/drivers/mmc/host/sdhci-s3c.c > @@ -513,7 +513,9 @@ 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); > @@ -620,10 +622,13 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev) > gpio_is_valid(pdata->ext_cd_gpio)) > sdhci_s3c_setup_card_detect_gpio(sc); > > + clk_disable(sc->clk_io); > 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]); > @@ -656,12 +661,15 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev) > if (gpio_is_valid(sc->ext_cd_gpio)) > gpio_free(sc->ext_cd_gpio); > > + clk_enable(sc->clk_io); > 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 < 3; ptr++) { > if (sc->clk_bus[ptr]) { > clk_put(sc->clk_bus[ptr]); > @@ -696,15 +704,28 @@ 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 Could I get an ACK on this patch from one of you, please? - Chris.
Looks good to me. Acked-by: Jaehoon Chung <jh80.chung@samsung.com> On 09/19/2012 03:14 PM, Chris Ball wrote: > Hi Jaehoon, Girish, > > On Fri, Sep 14 2012, Chander Kashyap wrote: >> Perform clock disable/enable in runtime suspend/resume. >> >> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> >> --- >> drivers/mmc/host/sdhci-s3c.c | 25 +++++++++++++++++++++++-- >> 1 file changed, 23 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c >> index 3f4518d..ffffd51 100644 >> --- a/drivers/mmc/host/sdhci-s3c.c >> +++ b/drivers/mmc/host/sdhci-s3c.c >> @@ -513,7 +513,9 @@ 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); >> @@ -620,10 +622,13 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev) >> gpio_is_valid(pdata->ext_cd_gpio)) >> sdhci_s3c_setup_card_detect_gpio(sc); >> >> + clk_disable(sc->clk_io); >> 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]); >> @@ -656,12 +661,15 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev) >> if (gpio_is_valid(sc->ext_cd_gpio)) >> gpio_free(sc->ext_cd_gpio); >> >> + clk_enable(sc->clk_io); >> 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 < 3; ptr++) { >> if (sc->clk_bus[ptr]) { >> clk_put(sc->clk_bus[ptr]); >> @@ -696,15 +704,28 @@ 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 > > Could I get an ACK on this patch from one of you, please? > > - Chris. >
Hi, On Wed, Sep 19 2012, Jaehoon Chung wrote: > Looks good to me. > > Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Thanks, pushed to mmc-next for 3.7. (The patch didn't merge cleanly so I applied it by hand; let me know if anything looks wrong.) - Chris.
Hi Chris, On 19 September 2012 13:13, Jaehoon Chung <jh80.chung@samsung.com> wrote: > Looks good to me. > > Acked-by: Jaehoon Chung <jh80.chung@samsung.com> > > On 09/19/2012 03:14 PM, Chris Ball wrote: >> Hi Jaehoon, Girish, >> >> On Fri, Sep 14 2012, Chander Kashyap wrote: >>> Perform clock disable/enable in runtime suspend/resume. >>> >>> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> >>> --- >>> drivers/mmc/host/sdhci-s3c.c | 25 +++++++++++++++++++++++-- >>> 1 file changed, 23 insertions(+), 2 deletions(-) >>> >>> diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c >>> index 3f4518d..ffffd51 100644 >>> --- a/drivers/mmc/host/sdhci-s3c.c >>> +++ b/drivers/mmc/host/sdhci-s3c.c >>> @@ -513,7 +513,9 @@ 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); >>> @@ -620,10 +622,13 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev) >>> gpio_is_valid(pdata->ext_cd_gpio)) >>> sdhci_s3c_setup_card_detect_gpio(sc); >>> >>> + clk_disable(sc->clk_io); This should be in #ifndef CONFIG_PM_RUNTIME check >>> 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]); >>> @@ -656,12 +661,15 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev) >>> if (gpio_is_valid(sc->ext_cd_gpio)) >>> gpio_free(sc->ext_cd_gpio); >>> >>> + clk_enable(sc->clk_io); This should be in #ifndef CONFIG_PM_RUNTIME check >>> 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 < 3; ptr++) { >>> if (sc->clk_bus[ptr]) { >>> clk_put(sc->clk_bus[ptr]); >>> @@ -696,15 +704,28 @@ 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 >> >> Could I get an ACK on this patch from one of you, please? >> >> - Chris. >> > I will resend this patch after fixing the issue.
Hi,
On Wed, Sep 19 2012, Chander Kashyap wrote:
> I will resend this patch after fixing the issue.
Thanks; please base your new patch against current mmc-next.
- Chris.
Thanks Chris , Sure i will do. On 19 September 2012 19:51, Chris Ball <cjb@laptop.org> wrote: > Hi, > > On Wed, Sep 19 2012, Chander Kashyap wrote: >> I will resend this patch after fixing the issue. > > Thanks; please base your new patch against current mmc-next. > > - Chris. > -- > Chris Ball <cjb@laptop.org> <http://printf.net/> > One Laptop Per Child > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, Am Freitag, 14. September 2012, 11:08:51 schrieb Chander Kashyap: > Perform clock disable/enable in runtime suspend/resume. > > Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> It seems this patch breaks my S3C2416 based machine with 3.7-rc1. I'm not yet sure why, but the only response I get is loop of: mmc0: Timeout waiting for hardware interrupt. mmc0: Internal clock never stabilised. mmc0: Timeout waiting for hardware interrupt. mmc0: Internal clock never stabilised. This only happens on the hsmmc channel using the gpio-based card detect and even prevents the card from beeing fully detected. The other hsmmc channel using a permanent emmc seems to be working fine. And of course, when I revert this patch everything works fine again. I'll investigate further, but it'd be also ok if someone has a fix for this before me :-) . Heiko
Hi Heiko, Sorry, i didn't check this patch with s3c2416. (i didn't have the s3c2416 board.) If you have a problem, i think good that revert this patch for fixing your problem. Also, i will check and share the result. Best Regards, Jaehoon Chung On 10/17/2012 06:15 PM, Heiko Stübner wrote: > Hi, > > Am Freitag, 14. September 2012, 11:08:51 schrieb Chander Kashyap: >> Perform clock disable/enable in runtime suspend/resume. >> >> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> > > It seems this patch breaks my S3C2416 based machine with 3.7-rc1. I'm not > yet sure why, but the only response I get is loop of: > > mmc0: Timeout waiting for hardware interrupt. > mmc0: Internal clock never stabilised. > mmc0: Timeout waiting for hardware interrupt. > mmc0: Internal clock never stabilised. > > > This only happens on the hsmmc channel using the gpio-based card detect and > even prevents the card from beeing fully detected. The other hsmmc channel > using a permanent emmc seems to be working fine. > > And of course, when I revert this patch everything works fine again. > > I'll investigate further, but it'd be also ok if someone has a fix for this > before me :-) . > > > Heiko > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
Hi, Am Donnerstag, 18. Oktober 2012, 04:04:42 schrieb Jaehoon Chung: > Sorry, i didn't check this patch with s3c2416. > (i didn't have the s3c2416 board.) > If you have a problem, i think good that revert this patch for fixing your > problem. Also, i will check and share the result. After looking a bit more through the code, I don't think the problem is 2416- specific but seems to be caused by the gpio card-detect code. sdhci_s3c_gpio_card_detect_thread calls sdhci_s3c_notify_change which in turn runs host->card_tasklet that seems to want to read stuff from the card. But this path seems to be missing a runtime-pm wakeup. I'm not yet sure what to add, especially, as tasklet_finish (called on some occasions from tasklet_card) already has a runtime_pm_put call, which would be unpaired in this code path. As there also could be other Samsung platforms affected that use the ext-gpio code, it's probably right to revert it for now. Or you see a easy fix :-) . Heiko > Best Regards, > Jaehoon Chung > > On 10/17/2012 06:15 PM, Heiko Stübner wrote: > > Hi, > > > > Am Freitag, 14. September 2012, 11:08:51 schrieb Chander Kashyap: > >> Perform clock disable/enable in runtime suspend/resume. > >> > >> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> > > > > It seems this patch breaks my S3C2416 based machine with 3.7-rc1. I'm not > > > > yet sure why, but the only response I get is loop of: > > mmc0: Timeout waiting for hardware interrupt. > > mmc0: Internal clock never stabilised. > > mmc0: Timeout waiting for hardware interrupt. > > mmc0: Internal clock never stabilised. > > > > This only happens on the hsmmc channel using the gpio-based card detect > > and even prevents the card from beeing fully detected. The other hsmmc > > channel using a permanent emmc seems to be working fine. > > > > And of course, when I revert this patch everything works fine again. > > > > I'll investigate further, but it'd be also ok if someone has a fix for > > this before me :-) . > > > > > > Heiko > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thursday, October 18, 2012, Heiko Stübner <heiko@sntech.de> wrote: > Hi, > > Am Donnerstag, 18. Oktober 2012, 04:04:42 schrieb Jaehoon Chung: > > Sorry, i didn't check this patch with s3c2416. > > (i didn't have the s3c2416 board.) > > If you have a problem, i think good that revert this patch for fixing your > > problem. Also, i will check and share the result. > > > After looking a bit more through the code, I don't think the problem is 2416- > specific but seems to be caused by the gpio card-detect code. > > sdhci_s3c_gpio_card_detect_thread calls sdhci_s3c_notify_change which in turn > runs host->card_tasklet that seems to want to read stuff from the card. But > this path seems to be missing a runtime-pm wakeup. > > I'm not yet sure what to add, especially, as tasklet_finish (called on some > occasions from tasklet_card) already has a runtime_pm_put call, which would be > unpaired in this code path. > > As there also could be other Samsung platforms affected that use the ext-gpio > code, it's probably right to revert it for now. Or you see a easy fix :-) . > Hi, I think clock is disabled during bus transaction. I'll send a patch. Could you test it? Thanks. Seungwon Jeon > > Heiko > > > > Best Regards, > > Jaehoon Chung > > > > On 10/17/2012 06:15 PM, Heiko Stübner wrote: > > > Hi, > > > > > > Am Freitag, 14. September 2012, 11:08:51 schrieb Chander Kashyap: > > >> Perform clock disable/enable in runtime suspend/resume. > > >> > > >> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> > > > > > > It seems this patch breaks my S3C2416 based machine with 3.7-rc1. I'm not > > > > > > yet sure why, but the only response I get is loop of: > > > mmc0: Timeout waiting for hardware interrupt. > > > mmc0: Internal clock never stabilised. > > > mmc0: Timeout waiting for hardware interrupt. > > > mmc0: Internal clock never stabilised. > > > > > > This only happens on the hsmmc channel using the gpio-based card detect > > > and even prevents the card from beeing fully detected. The other hsmmc > > > channel using a permanent emmc seems to be working fine. > > > > > > And of course, when I revert this patch everything works fine again. > > > > > > I'll investigate further, but it'd be also ok if someone has a fix for > > > this before me :-) . > > > > > > > > > Heiko > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Am Donnerstag, 18. Oktober 2012, 11:36:03 schrieb Seungwon Jeon: > On Thursday, October 18, 2012, Heiko Stübner <heiko@sntech.de> wrote: > > Hi, > > > > Am Donnerstag, 18. Oktober 2012, 04:04:42 schrieb Jaehoon Chung: > > > Sorry, i didn't check this patch with s3c2416. > > > (i didn't have the s3c2416 board.) > > > If you have a problem, i think good that revert this patch for fixing > > > your problem. Also, i will check and share the result. > > > > After looking a bit more through the code, I don't think the problem is > > 2416- specific but seems to be caused by the gpio card-detect code. > > > > sdhci_s3c_gpio_card_detect_thread calls sdhci_s3c_notify_change which in > > turn runs host->card_tasklet that seems to want to read stuff from the > > card. But this path seems to be missing a runtime-pm wakeup. > > > > I'm not yet sure what to add, especially, as tasklet_finish (called on > > some occasions from tasklet_card) already has a runtime_pm_put call, > > which would be unpaired in this code path. > > > > As there also could be other Samsung platforms affected that use the > > ext-gpio code, it's probably right to revert it for now. Or you see a > > easy fix :-) . > > Hi, > > I think clock is disabled during bus transaction. > I'll send a patch. Could you test it? Sure, I'll test it. Heiko > > > On 10/17/2012 06:15 PM, Heiko Stübner wrote: > > > > Hi, > > > > > > > > Am Freitag, 14. September 2012, 11:08:51 schrieb Chander Kashyap: > > > >> Perform clock disable/enable in runtime suspend/resume. > > > >> > > > >> Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> > > > > > > > > It seems this patch breaks my S3C2416 based machine with 3.7-rc1. I'm > > > > not > > > > > > > > yet sure why, but the only response I get is loop of: > > > > mmc0: Timeout waiting for hardware interrupt. > > > > mmc0: Internal clock never stabilised. > > > > mmc0: Timeout waiting for hardware interrupt. > > > > mmc0: Internal clock never stabilised. > > > > > > > > This only happens on the hsmmc channel using the gpio-based card > > > > detect and even prevents the card from beeing fully detected. The > > > > other hsmmc channel using a permanent emmc seems to be working fine. > > > > > > > > And of course, when I revert this patch everything works fine again. > > > > > > > > I'll investigate further, but it'd be also ok if someone has a fix > > > > for this before me :-) . > > > > > > > > > > > > Heiko > > > > -- > > > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" > > > > in the body of a message to majordomo@vger.kernel.org > > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c index 3f4518d..ffffd51 100644 --- a/drivers/mmc/host/sdhci-s3c.c +++ b/drivers/mmc/host/sdhci-s3c.c @@ -513,7 +513,9 @@ 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); @@ -620,10 +622,13 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev) gpio_is_valid(pdata->ext_cd_gpio)) sdhci_s3c_setup_card_detect_gpio(sc); + clk_disable(sc->clk_io); 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]); @@ -656,12 +661,15 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev) if (gpio_is_valid(sc->ext_cd_gpio)) gpio_free(sc->ext_cd_gpio); + clk_enable(sc->clk_io); 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 < 3; ptr++) { if (sc->clk_bus[ptr]) { clk_put(sc->clk_bus[ptr]); @@ -696,15 +704,28 @@ 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
Perform clock disable/enable in runtime suspend/resume. Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org> --- drivers/mmc/host/sdhci-s3c.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)