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reboot-mode: add support for reboot mode control

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A new driver uclass is created to handle the reboot mode control.

The new uclass driver is updating an environment variable with the
configured reboot mode. The mode is extracted from a map provided
at initialization time. The map contains a list of modes
and associated ids.

Signed-off-by: Nandor Han <nandor.han@vaisala.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Nandor Han 2021-06-10 16:56:43 +03:00 • committed by Tom Rini
parent f534d93cbf
commit 2541ce2c1a
7 changed files with 219 additions and 0 deletions
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56
include/reboot-mode/reboot-mode.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c), Vaisala Oyj
*/
#ifndef REBOOT_MODE_REBOOT_MODE_H__
#define REBOOT_MODE_REBOOT_MODE_H__
#include <asm/types.h>
#include <dm/device.h>
struct reboot_mode_mode {
const char *mode_name;
u32 mode_id;
};
struct reboot_mode_uclass_platdata {
struct reboot_mode_mode *modes;
u8 count;
const char *env_variable;
};
struct reboot_mode_ops {
/**
* get() - get the current reboot mode value
*
* Returns the current value from the reboot mode backing store.
*
* @dev: Device to read from
* @rebootmode: Address to save the current reboot mode value
*/
int (*get)(struct udevice *dev, u32 *rebootmode);
/**
* set() - set a reboot mode value
*
* Sets the value in the reboot mode backing store.
*
* @dev: Device to read from
* @rebootmode: New reboot mode value to store
*/
int (*set)(struct udevice *dev, u32 rebootmode);
};
/* Access the operations for a reboot mode device */
#define reboot_mode_get_ops(dev) ((struct reboot_mode_ops *)(dev)->driver->ops)
/**
* dm_reboot_mode_update() - Update the reboot mode env variable.
*
* @dev: Device to read from
* @return 0 if OK, -ve on error
*/
int dm_reboot_mode_update(struct udevice *dev);
#endif /* REBOOT_MODE_REBOOT_MODE_H__ */