diff options
| -rw-r--r-- | src/arch/x86/acpi_device.c | 9 | ||||
| -rw-r--r-- | src/include/gpio.h | 10 | ||||
| -rw-r--r-- | src/lib/gpio.c | 6 |
3 files changed, 23 insertions, 2 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c index 69d44f3f33..940d87156d 100644 --- a/src/arch/x86/acpi_device.c +++ b/src/arch/x86/acpi_device.c @@ -314,8 +314,13 @@ void acpi_device_write_gpio(const struct acpi_gpio *gpio) acpi_device_fill_from_len(pin_table_offset, start); /* Pin Table, one word for each pin */ - for (pin = 0; pin < gpio->pin_count; pin++) - acpigen_emit_word(gpio->pins[pin]); + for (pin = 0; pin < gpio->pin_count; pin++) { + uint16_t acpi_pin = gpio->pins[pin]; +#if IS_ENABLED(CONFIG_GENERIC_GPIO_LIB) + acpi_pin = gpio_acpi_pin(acpi_pin); +#endif + acpigen_emit_word(acpi_pin); + } /* Fill in Resource Source Name Offset */ acpi_device_fill_from_len(resource_offset, start); diff --git a/src/include/gpio.h b/src/include/gpio.h index 3f462df295..69a0828f58 100644 --- a/src/include/gpio.h +++ b/src/include/gpio.h @@ -41,6 +41,16 @@ int _gpio_base3_value(gpio_t gpio[], int num_gpio, int binary_first); const char *gpio_acpi_path(gpio_t gpio); /* + * This function may be implemented by SoC/board code to provide + * a mapping from the internal representation of a GPIO to the 16bit + * value used in an ACPI GPIO pin table entry. + * + * If not implemented by the SOC the default handler will return 0 + * because the underlying type of gpio_t is unknown. + */ +uint16_t gpio_acpi_pin(gpio_t gpio); + +/* * Read the value presented by the set of GPIOs, when each pin is interpreted * as a base-2 digit (LOW = 0, HIGH = 1). * diff --git a/src/lib/gpio.c b/src/lib/gpio.c index b0a5f4dfc3..81d6f6bbad 100644 --- a/src/lib/gpio.c +++ b/src/lib/gpio.c @@ -145,3 +145,9 @@ __attribute__((weak)) const char *gpio_acpi_path(gpio_t gpio) { return NULL; } + +/* Default handler returns 0 because type of gpio_t is unknown */ +__attribute__((weak)) uint16_t gpio_acpi_pin(gpio_t gpio) +{ + return 0; +} |