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gpiolib: acpi: Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk

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commit 62d5247d23 upstream.

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: ba8c90c618 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
Depends-on: 0ea683931a ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-02-25 18:33:18 +02:00 committed by Greg Kroah-Hartman
parent 845ec46053
commit 8df70a5b4d
2 changed files with 8 additions and 1 deletions
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7
drivers/gpio/gpiolib-acpi.c
View file

@ -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;

2
include/linux/gpio/consumer.h
View file

@ -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;
};