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gpiolib: of: add a quirk for legacy names in Mediatek mt2701-cs42448

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The driver is using non-standard "i2s1-in-sel-gpio1" and
"i2s1-in-sel-gpio2" names to describe its gpios. In preparation to
converting to the standard naming (i2s1-in-sel-gpios) and switching the
driver to gpiod API add a quirk to gpiolib to keep compatibility with
existing DTSes.

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Dmitry Torokhov 2022-10-17 22:41:02 -07:00 committed by Bartosz Golaszewski
parent f5a681d238
commit 326c3753a6
1 changed files with 33 additions and 0 deletions
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33
drivers/gpio/gpiolib-of.c
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@ -488,6 +488,38 @@ static struct gpio_desc *of_find_usb_gpio(struct device_node *np,
return of_get_named_gpiod_flags(np, con_id, idx, of_flags);
}
static struct gpio_desc *of_find_mt2701_gpio(struct device_node *np,
const char *con_id,
unsigned int idx,
enum of_gpio_flags *of_flags)
{
struct gpio_desc *desc;
const char *legacy_id;
if (!IS_ENABLED(CONFIG_SND_SOC_MT2701_CS42448))
return ERR_PTR(-ENOENT);
if (!of_device_is_compatible(np, "mediatek,mt2701-cs42448-machine"))
return ERR_PTR(-ENOENT);
if (!con_id || strcmp(con_id, "i2s1-in-sel"))
return ERR_PTR(-ENOENT);
if (idx == 0)
legacy_id = "i2s1-in-sel-gpio1";
else if (idx == 1)
legacy_id = "i2s1-in-sel-gpio2";
else
return ERR_PTR(-ENOENT);
desc = of_get_named_gpiod_flags(np, legacy_id, 0, of_flags);
if (!gpiod_not_found(desc))
pr_info("%s is using legacy gpio name '%s' instead of '%s-gpios'\n",
of_node_full_name(np), legacy_id, con_id);
return desc;
}
typedef struct gpio_desc *(*of_find_gpio_quirk)(struct device_node *np,
const char *con_id,
unsigned int idx,
@ -498,6 +530,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
of_find_regulator_gpio,
of_find_arizona_gpio,
of_find_usb_gpio,
of_find_mt2701_gpio,
NULL
};