diff options
Diffstat (limited to 'include/acpi/acpi_device.h')
| -rw-r--r-- | include/acpi/acpi_device.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/acpi/acpi_device.h b/include/acpi/acpi_device.h index 62b1295201..e7db7bf5ad 100644 --- a/include/acpi/acpi_device.h +++ b/include/acpi/acpi_device.h @@ -342,4 +342,46 @@ int acpi_device_write_i2c_dev(struct acpi_ctx *ctx, const struct udevice *dev); */ int acpi_device_write_spi_dev(struct acpi_ctx *ctx, const struct udevice *dev); +/** + * acpi_device_add_power_res() - Add a basic PowerResource block for a device + * + * This includes GPIOs to control enable, reset and stop operation of the + * device. Each GPIO is optional, but at least one must be provided. + * This can be applied to any device that has power control, so is fairly + * generic. + * + * Reset - Put the device into / take the device out of reset. + * Enable - Enable / disable power to device. + * Stop - Stop / start operation of device. + * + * @ctx: ACPI context pointer + * @tx_state_val: Mask to use to toggle the TX state on the GPIO pin, e,g. + * PAD_CFG0_TX_STATE + * @dw0_read: Name to use to read dw0, e.g. "\\_SB.GPC0" + * @dw0_write: Name to use to read dw0, e.g. "\\_SB.SPC0" + * @reset_gpio: GPIO used to take device out of reset or to put it into reset + * @reset_delay_ms: Delay to be inserted after device is taken out of reset + * (_ON method delay) + * @reset_off_delay_ms: Delay to be inserted after device is put into reset + * (_OFF method delay) + * @enable_gpio: GPIO used to enable device + * @enable_delay_ms: Delay to be inserted after device is enabled + * @enable_off_delay_ms: Delay to be inserted after device is disabled + * (_OFF method delay) + * @stop_gpio: GPIO used to stop operation of device + * @stop_delay_ms: Delay to be inserted after disabling stop (_ON method delay) + * @stop_off_delay_ms: Delay to be inserted after enabling stop. + * (_OFF method delay) + * + * @return 0 if OK, -ve if at least one GPIO is not provided + */ +int acpi_device_add_power_res(struct acpi_ctx *ctx, u32 tx_state_val, + const char *dw0_read, const char *dw0_write, + const struct gpio_desc *reset_gpio, + uint reset_delay_ms, uint reset_off_delay_ms, + const struct gpio_desc *enable_gpio, + uint enable_delay_ms, uint enable_off_delay_ms, + const struct gpio_desc *stop_gpio, + uint stop_delay_ms, uint stop_off_delay_ms); + #endif |