AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-05 07:26:48 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

gpiolib: acpi: Introduce NO_RESTRICTION quirk

Browse Source 
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: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2017-11-10 15:40:33 +02:00 committed by Linus Walleij
parent ce0929d222
commit 1b2ca32ab0
2 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpio/gpiolib-acpi.c
View File

@ -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);
if (ret)
dev_dbg(dev, "Override GPIO initialization flags\n");
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;
}

4
include/linux/acpi.h
View File

@ -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;
};