diff options
| author | Simon Glass <sjg@chromium.org> | 2020-07-07 22:11:47 +0300 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 09:32:24 +0300 |
| commit | 4ebc940b39b6a43de9d1fa74653321cd6fdb4d3a (patch) | |
| tree | 879e368605d9dae2a7cf4ba960711554c9b28eba /include/acpi | |
| parent | a9e0a077df5509c3d4b49e745c746c38a4f9a7a1 (diff) | |
| download | u-boot-4ebc940b39b6a43de9d1fa74653321cd6fdb4d3a.tar.xz | |
acpi: Support generation of a GPIO/irq for a device
Some devices use interrupts but some use GPIOs. Since these are fully
specified in the device tree we can automatically produce the correct ACPI
descriptor for a device.
Add a function to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_device.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/acpi/acpi_device.h b/include/acpi/acpi_device.h index 002e835644..67a242eb75 100644 --- a/include/acpi/acpi_device.h +++ b/include/acpi/acpi_device.h @@ -255,4 +255,19 @@ int acpi_device_write_gpio(struct acpi_ctx *ctx, const struct acpi_gpio *gpio); int acpi_device_write_gpio_desc(struct acpi_ctx *ctx, const struct gpio_desc *desc); +/** + * acpi_device_write_interrupt_or_gpio() - Write interrupt or GPIO to ACPI + * + * This reads an interrupt from the device tree "interrupts-extended" property, + * if available. If not it reads the first GPIO with the name @prop. + * + * If an interrupt is found, an ACPI interrupt descriptor is written to the ACPI + * output. If not, but if a GPIO is found, a GPIO descriptor is written. + * + * @return irq or GPIO pin number if OK, -ve if neither an interrupt nor a GPIO + * could be found, or some other error occurred + */ +int acpi_device_write_interrupt_or_gpio(struct acpi_ctx *ctx, + struct udevice *dev, const char *prop); + #endif |