Re: [PATCH 3/4 v2] mmc: host: switch OF parser to use gpio descriptors

[Ulf Hansson <ulf.hansson@xxxxxxxxxx>]

On 27 August 2014 13:00, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
> This switches the central MMC OF parser to use gpio descriptors
> instead of grabbing GPIOs explicitly from the device tree.
> This strips out an unecessary use of the integer-based GPIO
> API that we want to get rid of, cuts down on code as the
> gpio descriptor code will handle active low flags.
>
> Acked-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>

Thanks! Applied for next.

Kind regards
Uffe


> ---
> ChangeLog v1->v2:
> - Restore error reporting as done in previous stand-alone
>   patch.
> ---
>  drivers/mmc/core/host.c | 68 +++++++++++++++++--------------------------------
>  1 file changed, 23 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index 95cceae96944..6f7ed9c50346 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -310,9 +310,7 @@ int mmc_of_parse(struct mmc_host *host)
>  {
>         struct device_node *np;
>         u32 bus_width;
> -       bool explicit_inv_wp, gpio_inv_wp = false;
> -       enum of_gpio_flags flags;
> -       int len, ret, gpio;
> +       int len, ret;
>
>         if (!host->parent || !host->parent->of_node)
>                 return 0;
> @@ -360,60 +358,40 @@ int mmc_of_parse(struct mmc_host *host)
>         if (of_find_property(np, "non-removable", &len)) {
>                 host->caps |= MMC_CAP_NONREMOVABLE;
>         } else {
> -               bool explicit_inv_cd, gpio_inv_cd = false;
> -
> -               explicit_inv_cd = of_property_read_bool(np, "cd-inverted");
> +               if (of_property_read_bool(np, "cd-inverted"))
> +                       host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
>
>                 if (of_find_property(np, "broken-cd", &len))
>                         host->caps |= MMC_CAP_NEEDS_POLL;
>
> -               gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags);
> -               if (gpio == -EPROBE_DEFER)
> -                       return gpio;
> -               if (gpio_is_valid(gpio)) {
> -                       if (!(flags & OF_GPIO_ACTIVE_LOW))
> -                               gpio_inv_cd = true;
> -
> -                       ret = mmc_gpio_request_cd(host, gpio, 0);
> -                       if (ret < 0) {
> -                               dev_err(host->parent,
> -                                       "Failed to request CD GPIO #%d: %d!\n",
> -                                       gpio, ret);
> +               ret = mmc_gpiod_request_cd(host, "cd", 0, false, 0);
> +               if (ret) {
> +                       if (ret == -EPROBE_DEFER)
>                                 return ret;
> -                       } else {
> -                               dev_info(host->parent, "Got CD GPIO #%d.\n",
> -                                        gpio);
> +                       if (ret != -ENOENT) {
> +                               dev_err(host->parent,
> +                                       "Failed to request CD GPIO: %d\n",
> +                                       ret);
>                         }
> -               }
> -
> -               if (explicit_inv_cd ^ gpio_inv_cd)
> -                       host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
> +               } else
> +                       dev_info(host->parent, "Got CD GPIO\n");
>         }
>
>         /* Parse Write Protection */
> -       explicit_inv_wp = of_property_read_bool(np, "wp-inverted");
> -
> -       gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags);
> -       if (gpio == -EPROBE_DEFER) {
> -               ret = -EPROBE_DEFER;
> -               goto out;
> -       }
> -       if (gpio_is_valid(gpio)) {
> -               if (!(flags & OF_GPIO_ACTIVE_LOW))
> -                       gpio_inv_wp = true;
> +       if (of_property_read_bool(np, "wp-inverted"))
> +               host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
>
> -               ret = mmc_gpio_request_ro(host, gpio);
> -               if (ret < 0) {
> -                       dev_err(host->parent,
> -                               "Failed to request WP GPIO: %d!\n", ret);
> +       ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0);
> +       if (ret) {
> +               if (ret == -EPROBE_DEFER)
>                         goto out;
> -               } else {
> -                               dev_info(host->parent, "Got WP GPIO #%d.\n",
> -                                        gpio);
> +               if (ret != -ENOENT) {
> +                       dev_err(host->parent,
> +                               "Failed to request WP GPIO: %d\n",
> +                               ret);
>                 }
> -       }
> -       if (explicit_inv_wp ^ gpio_inv_wp)
> -               host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
> +       } else
> +               dev_info(host->parent, "Got WP GPIO\n");
>
>         if (of_find_property(np, "cap-sd-highspeed", &len))
>                 host->caps |= MMC_CAP_SD_HIGHSPEED;
> --
> 1.9.3
>
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