mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-07 19:56:18 +09:00
2715b3623c
At present U-Boot does not support the different ACPI status values, but it is best to put this logic in a central place. Add a function to get the device status. 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>
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Generation of tables for particular device types
|
|
*
|
|
* Copyright 2019 Google LLC
|
|
* Mostly taken from coreboot file of the same name
|
|
*/
|
|
|
|
#ifndef __ACPI_DEVICE_H
|
|
#define __ACPI_DEVICE_H
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
struct udevice;
|
|
|
|
/* Length of a full path to an ACPI device */
|
|
#define ACPI_PATH_MAX 30
|
|
|
|
/* Values that can be returned for ACPI device _STA method */
|
|
enum acpi_dev_status {
|
|
ACPI_DSTATUS_PRESENT = BIT(0),
|
|
ACPI_DSTATUS_ENABLED = BIT(1),
|
|
ACPI_DSTATUS_SHOW_IN_UI = BIT(2),
|
|
ACPI_DSTATUS_OK = BIT(3),
|
|
ACPI_DSTATUS_HAS_BATTERY = BIT(4),
|
|
|
|
ACPI_DSTATUS_ALL_OFF = 0,
|
|
ACPI_DSTATUS_HIDDEN_ON = ACPI_DSTATUS_PRESENT | ACPI_DSTATUS_ENABLED |
|
|
ACPI_DSTATUS_OK,
|
|
ACPI_DSTATUS_ALL_ON = ACPI_DSTATUS_HIDDEN_ON |
|
|
ACPI_DSTATUS_SHOW_IN_UI,
|
|
};
|
|
|
|
/**
|
|
* acpi_device_path() - Get the full path to an ACPI device
|
|
*
|
|
* This gets the full path in the form XXXX.YYYY.ZZZZ where XXXX is the root
|
|
* and ZZZZ is the device. All parent devices are added to the path.
|
|
*
|
|
* @dev: Device to check
|
|
* @buf: Buffer to place the path in (should be ACPI_PATH_MAX long)
|
|
* @maxlen: Size of buffer (typically ACPI_PATH_MAX)
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int acpi_device_path(const struct udevice *dev, char *buf, int maxlen);
|
|
|
|
/**
|
|
* acpi_device_scope() - Get the scope of an ACPI device
|
|
*
|
|
* This gets the scope which is the full path of the parent device, as per
|
|
* acpi_device_path().
|
|
*
|
|
* @dev: Device to check
|
|
* @buf: Buffer to place the path in (should be ACPI_PATH_MAX long)
|
|
* @maxlen: Size of buffer (typically ACPI_PATH_MAX)
|
|
* @return 0 if OK, -EINVAL if the device has no parent, other -ve on other
|
|
* error
|
|
*/
|
|
int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen);
|
|
|
|
/**
|
|
* acpi_device_status() - Get the status of a device
|
|
*
|
|
* This currently just returns ACPI_DSTATUS_ALL_ON. It does not support
|
|
* inactive or hidden devices.
|
|
*
|
|
* @dev: Device to check
|
|
* @return device status, as ACPI_DSTATUS_...
|
|
*/
|
|
enum acpi_dev_status acpi_device_status(const struct udevice *dev);
|
|
|
|
#endif
|