Re: [PATCH 3/3] mmc: sdhci-s3c: Add clk_(enable/disable) in runtime suspend/resume

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Hi Chris,

On 19 September 2012 13:13, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote:
> Looks good to me.
>
> Acked-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
>
> 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@xxxxxxxxxx>
>>> ---
>>>  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.


-- 
with warm regards,
Chander Kashyap
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