Hi Prabhakar,
Thanks for the patch.
> -----Original Message-----
> From: Prabhakar <prabhakar.csengg@xxxxxxxxx>
> Sent: 13 January 2025 11:24
> Subject: [PATCH v3 5/6] watchdog: rzv2h_wdt: Add support to retrieve the bootstatus information
>
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> On the RZ/V2H(P) SoC we can determine if the current boot is due to `Power-on-Reset` or due to the
> `Watchdog`. The information used to determine this is present on the CPG block.
>
> The CPG_ERROR_RSTm(m = 2 - 8) registers are set in response to an error interrupt causing an reset.
> CPG_ERROR_RST2[ERROR_RST0/1/2] is set if there was an underflow/overflow on WDT1 causing an error
> interrupt.
>
> To fetch this information from CPG block `syscon` is used and bootstatus field in the watchdog device
> is updated based on the CPG_ERROR_RST2[ERROR_RST0/1/2] bit. Upon consumig
> CPG_ERROR_RST2[ERROR_RST0/1/2] bit we clear it.
As syscon-cpg is available, can we get rid of Linux assuming TF_A/U-boot for configuring Error Reset
Select Registers(0x10420B04)for the watchdog to reset the system?
After this, each watchdog device node will have, selection{offset,bit} status{ offset,bit}
renesas,syscon-cpg-error-rst-sel = <&cpg 0xb04 1>;
renesas,syscon-cpg-error-rst = <&cpg 0xb40 1>;
Or
renesas,syscon-cpg-error-rst = < &cpg 0xb04 1 0xb40 1>;
Cheers,
Biju
