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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-11-10 15:40:33 +0200
committerLinus Walleij <linus.walleij@linaro.org>2017-11-30 10:53:52 +0100
commit1b2ca32ab0b8311da84fe692522266b32ad4315e (patch)
tree013f02dc39d22c86eed547a7b0d25a867c3f811d /drivers/gpio/gpiolib-acpi.c
parentce0929d222f8cb18a66611642dc0661d633ce192 (diff)
downloadlinux-1b2ca32ab0b8311da84fe692522266b32ad4315e.tar.bz2
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: 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>
Diffstat (limited to 'drivers/gpio/gpiolib-acpi.c')
-rw-r--r--drivers/gpio/gpiolib-acpi.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 711f64b9dd30..430a1475212d 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -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;
}