Re: [PATCH 1/6] mmc: slot-gpio: Record GPIO descriptors instead of GPIO numbers

[Adrian Hunter <adrian.hunter@intel.com>]

On 14.03.2014 11:06, Linus Walleij wrote:
> On Mon, Mar 10, 2014 at 2:02 PM, Adrian Hunter <adrian.hunter@intel.com> wrote:
> 
>> In preparation for adding a descriptor-based CD GPIO
>> API, switch from recording GPIO numbers to recording
>> GPIO descriptors.
>>
>> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> 
> Certainly this makes things look better from a GPIO POV
> so Acked-by.
> 
> However:
> 
> (...)
>> +       ctx->ro_gpio = gpio_to_desc(gpio);
> (...)
>> +       ctx->cd_gpio = gpio_to_desc(gpio);
> 
> How much harder would it be to switch the platforms using this
> MMC driver to pass GPIO descriptors using the gpiod_lookup_table
> in affected platforms (or device tree or ACPI) and then use
> devm_gpiod_get[_index]() in probe()?

There are 10 drivers plus users of mmc_of_config(), so too much work for me
right now.  Also parts that relate to device-tree are outside my sphere.

> This can certainly be step 2, but that is where we want to go with
> the GPIO clean-up work in the long run.

Perhaps Ulf or Guennadi would be interested.