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https://github.com/AsahiLinux/u-boot
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c74675bd90
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>
22 lines
681 B
Text
22 lines
681 B
Text
RTC Reboot Mode Configuration
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Required Properties:
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- compatible: must be "reboot-mode-rtc".
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- rtc: reference to the rtc device used.
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- reg: start register and the number of bytes used. Maximum 4 bytes supported.
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- modes: list of properties that define the modes and associated unique ids.
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Optional Properties:
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- u-boot,env-variable: used to save the reboot mode (default: reboot-mode).
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- big-endian: if the magic value is stored in big-endian. (default: false).
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Example:
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reboot-mode-rtc {
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compatible = "reboot-mode-rtc";
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rtc = <&rtc_0>;
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reg = <0x14 4>;
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u-boot,env-variable = "bootstatus";
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big-endian;
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modes-test = <0x21969147>;
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modes-download = <0x51939147>;
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};
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