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powerpc: dts: turris1x.dts: Set lower priority for CPLD syscon-reboot

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Due to CPLD firmware bugs, set CPLD syscon-reboot priority level to 64
(between rstcr and watchdog) to ensure that rstcr's global-utilities reset
method which is preferred stay as default one, and to ensure that CPLD
syscon-reboot is more preferred than watchdog reset method.

Fixes: 0531a4abd1 ("powerpc: dts: turris1x.dts: Add CPLD reboot node")
Depends-on: e6333293f2 ("power: reset: syscon-reboot: Add support for specifying priority")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230220080435.4237-1-pali@kernel.org
This commit is contained in:
Pali Rohár 2023-02-20 09:04:35 +01:00 committed by Michael Ellerman
parent 6f8675a6b0
commit bec4646256
1 changed files with 23 additions and 0 deletions
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23
arch/powerpc/boot/dts/turris1x.dts
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@ -367,11 +367,34 @@
};
reboot@d {
/*
* CPLD firmware which manages system reset and
* watchdog registers has bugs. It does not
* autoclear system reset register after change
* and watchdog ignores reset line on immediate
* succeeding reset cycle triggered by watchdog.
* These bugs have to be workarounded in U-Boot
* bootloader. So use system reset via syscon as
* a last resort because older U-Boot versions
* do not have workaround for watchdog.
*
* Reset method via rstcr's global-utilities
* (the preferred one) has priority level 128,
* watchdog has priority level 0 and default
* syscon-reboot priority level is 192.
*
* So define syscon-reboot with custom priority
* level 64 (between rstcr and watchdog) because
* rstcr should stay as default preferred reset
* method and reset via watchdog is more broken
* than system reset via syscon.
*/
compatible = "syscon-reboot";
reg = <0x0d 0x01>;
offset = <0x0d>;
mask = <0x01>;
value = <0x01>;
priority = <64>;
};
led-controller@13 {