[ Upstream commit 62d5247d239d4b48762192a251c647d7c997616a ]
On some systems the ACPI tables has wrong pin number and instead of having a relative one it provides an absolute one in the global GPIO number space.
Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk to cope with such cases.
Fixes: ba8c90c61847 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2") Depends-on: 0ea683931adb ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip") Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Acked-by: Mika Westerberg mika.westerberg@linux.intel.com Acked-by: Linus Walleij linus.walleij@linaro.org --- drivers/gpio/gpiolib-acpi.c | 7 ++++++- include/linux/gpio/consumer.h | 2 ++ 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index b1b6dee75924..49a1f8ce4baa 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -649,6 +649,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) if (!lookup->desc) { const struct acpi_resource_gpio *agpio = &ares->data.gpio; bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; + struct gpio_desc *desc; int pin_index;
if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint) @@ -661,8 +662,12 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) if (pin_index >= agpio->pin_table_length) return 1;
- lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr, + if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER) + desc = gpio_to_desc(agpio->pin_table[pin_index]); + else + desc = acpi_get_gpiod(agpio->resource_source.string_ptr, agpio->pin_table[pin_index]); + lookup->desc = desc; lookup->info.pin_config = agpio->pin_config; lookup->info.gpioint = gpioint;
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 901aab89d025..79f450e93abf 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -674,6 +674,8 @@ struct acpi_gpio_mapping { * get GpioIo type explicitly, this quirk may be used. */ #define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1) +/* Use given pin as an absolute GPIO number in the system */ +#define ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER BIT(2)
unsigned int quirks; };