On Tue, Aug 12, 2014 at 10:25 AM, Linus Walleij
<[email protected]> wrote:
> - /* If DT, cd/wp gpios must be supplied through it. */
> - if (!np && gpio_is_valid(plat->gpio_cd)) {
> - ret = mmc_gpio_request_cd(mmc, plat->gpio_cd, 0);
> - if (ret)
> - goto clk_disable;
> - }
> - if (!np && gpio_is_valid(plat->gpio_wp)) {
> - ret = mmc_gpio_request_ro(mmc, plat->gpio_wp);
> - if (ret)
> - goto clk_disable;
> + /*
> + * If:
> + * - not using DT but using a descriptor table, or
> + * - using a table of descriptors ALONGSIDE DT, or
> + * look up these descriptors named "cd" and "wp" right here, fail
> + * silently of these do not exist and proceed to try platform data
> + */
> + if (!np) {
> + ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);
I am not familiar with this driver, but since mmc_gpiod_request_cd()
uses gpiod_get(), can't you call it outside of the (!np) condition?
You should not have to do this kind of check when using the gpiod API.
> + if (!ret)
> + dev_info(mmc_dev(mmc), "got CD GPIO (table)\n");
> + else {
I think you want to add brackets around the dev_info() line to make
checkpatch.pl happy.
> + if (ret == -EPROBE_DEFER)
> + goto clk_disable;
> + else if (gpio_is_valid(plat->gpio_cd)) {
> + ret = mmc_gpio_request_cd(mmc, plat->gpio_cd,
> 0);
> + if (ret)
> + goto clk_disable;
> + else
> + dev_info(mmc_dev(mmc), "got CD GPIO
> (pdata)\n");
> + } else {
> + dev_dbg(mmc_dev(mmc),
> + "no CD GPIO in DT, table or pdata\n");
> + }
> + }
> +
> + ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0);
> + if (!ret)
> + dev_info(mmc_dev(mmc), "got WP GPIO (table)\n");
> + else {
Same remark as above.
> + if (ret == -EPROBE_DEFER)
> + goto clk_disable;
> + else if (gpio_is_valid(plat->gpio_wp)) {
> + ret = mmc_gpio_request_ro(mmc, plat->gpio_wp);
> + if (ret)
> + goto clk_disable;
> + else
> + dev_info(mmc_dev(mmc), "got WP GPIO
> (pdata)\n");
> + } else {
> + dev_dbg(mmc_dev(mmc),
> + "no WP GPIO in DT, table or pdata\n");
> + }
> + }
I wonder (again, without knowing better) if this gpiod/gpio fallback
logic should not be put directly into mmc_gpio_request_ro/cd instead
of having two functions? Couldn't other drivers also benefit from it
that way?
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