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reboot-mode: read the boot mode from RTC memory

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RTC devices could provide battery-backed memory that can be used for
storing the reboot mode magic value.

Add a new reboot-mode back-end that uses RTC to store the reboot-mode
magic value. The driver also supports both endianness modes.

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 16:56:45 +03:00 • committed by Tom Rini
parent f9db2f16cb
commit c74675bd90
8 changed files with 215 additions and 0 deletions
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16
include/reboot-mode/reboot-mode-rtc.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c), Vaisala Oyj
*/
#ifndef REBOOT_MODE_REBOOT_MODE_RTC_H_
#define REBOOT_MODE_REBOOT_MODE_RTC_H_
struct reboot_mode_rtc_platdata {
struct udevice *rtc;
bool is_big_endian;
int addr;
size_t size;
};
#endif /* REBOOT_MODE_REBOOT_MODE_RTC_H_ */