Tue, 15 Apr 2014 10:33:06 +0200 от Linus Walleij <linus.walleij@xxxxxxxxxx>:
> The next step in modernization of GPIO is to let drivers handle
> descriptors rather than integer numbers representing GPIO pins,
> akin to how clocks or regulators are already handled today.
>
> This patch makes the MMCI driver use GPIO descriptos in the
> core code with fallback code using the platform data if that
> is not possible. After all platforms with MMCI have been
> migrated to use descriptors, the platform data entries for
> GPIO pins can be removed.
>
> Cc: Alexandre Courbot <gnurou@xxxxxxxxx>
> Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> Hi Russell,Ulf: there is no hurry to do these changes (only used
> for my very corner-case MMCI PL181 experiments) but it's the
> desired direction to use descriptors for GPIOs going forward.
> I can rebase this on top of Ulf's patch stack any time, no
> problem.
> ---
...
> static void mmci_dt_populate_generic_pdata(struct device_node *np,
> - struct mmci_platform_data *pdata)
> + struct mmci_platform_data *pdata)
> {
> int bus_width = 0;
>
> - pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
> - pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0);
> -
> if (of_get_property(np, "cd-inverted", NULL))
> pdata->cd_invert = true;
You could even eliminate "cd-inverted" property for DT case.
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