[alsa-devel] [PATCH v4 7/9] davinci: MMC/SD support for Omapl138-Hawkboar

Victor Rodriguez vm.rod25 at gmail.com
Tue Oct 19 03:50:56 CEST 2010

On Mon, Oct 18, 2010 at 8:16 PM, Jon Povey <Jon.Povey at racelogic.co.uk> wrote:
> davinci-linux-open-source-bounces at linux.davincidsp.com wrote:
>> I think that you mean that I should not call gpio_direction_input if
>> gpio_request failed am I right ?
> Yes, if gpio_request() fails that means you have not claimed that gpio,
> something else is using it already or it's not available due to other
> misconfiguration.
> So you shouldn't be trying to set its direction or anything like that.
> --
> Jon Povey
> jon.povey at racelogic.co.uk
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Hi Jon

Yes you are right and as I understand gpio_request will give a 0 if it
success and because of that the warning never will appear, if there is
a problem there will be a -1 and the warning will be printed. I could
fix this with a return that breaks the code like this

       ret = gpio_request(DA850_HAWK_MMCSD_CD_PIN, "MMC CD\n");
       if (ret) {
               pr_warning("%s: can not open GPIO %d\n",
                       __func__, DA850_HAWK_MMCSD_CD_PIN);

Is this ok ?


Sincerely yours

Victor Rodriguez

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