Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1b2ca32a authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Linus Walleij
Browse files

gpiolib: acpi: Introduce NO_RESTRICTION quirk 



Allow to relax IoRestriction for certain cases.

One of the use case is incorrectly cooked ACPI table where interrupt pin is
defined with GpioIo() macro with IoRestrictionOutputOnly.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ce0929d2

drivers/gpio/gpiolib-acpi.c

+10 −3
Original line number Diff line number Diff line
@@ -496,11 +496,18 @@ int 
acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)

{

	struct device *dev = &info->adev->dev;

	enum gpiod_flags old = *flags;

	int ret;



	ret = __acpi_gpio_update_gpiod_flags(flags, info->flags);

	ret = __acpi_gpio_update_gpiod_flags(&old, info->flags);

	if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) {

		if (ret)

			dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n");

	} else {

		if (ret)

			dev_dbg(dev, "Override GPIO initialization flags\n");

		*flags = old;

	}



	return ret;

}

include/linux/acpi.h

+4 −0
Original line number Diff line number Diff line
@@ -978,6 +978,10 @@ struct acpi_gpio_mapping { 
	const char *name;

	const struct acpi_gpio_params *data;

	unsigned int size;



/* Ignore IoRestriction field */

#define ACPI_GPIO_QUIRK_NO_IO_RESTRICTION	BIT(0)



	unsigned int quirks;

};