On Fri, Dec 27, 2024 at 07:02:05PM +0000, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> The CPG block in the RZ/V2H(P) and RZ/G3E SoCs includes Error Reset
> Registers (CPG_ERROR_RSTm). A system reset is triggered in response to
> error interrupt factors, and the corresponding bit is set in the
> CPG_ERROR_RSTm register. These registers can be utilized by various IP
> blocks as needed.
>
> For example, specific bits in these registers indicate resets caused by
> events such as underflow or overflow of the watchdog timer. This
> functionality allows the watchdog driver to determine whether the current
> boot resulted from a `Power-on Reset` or a `Watchdog Reset`.
>
> Add the syscon-compatible property to the RZ/V2H(P) and RZ/G3E CPG block,
> allowing drivers to interact with the CPG_ERROR_RSTm registers as required.
This is an ABI change. That's okay because...?
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> ---
> v1->v2
> - No change
> ---
> .../devicetree/bindings/clock/renesas,rzv2h-cpg.yaml | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
> index c3fe76abd549..f42d79e73e70 100644
> --- a/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
> +++ b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
> @@ -17,9 +17,11 @@ description:
>
> properties:
> compatible:
> - enum:
> - - renesas,r9a09g047-cpg # RZ/G3E
> - - renesas,r9a09g057-cpg # RZ/V2H
> + items:
> + - enum:
> + - renesas,r9a09g047-cpg # RZ/G3E
> + - renesas,r9a09g057-cpg # RZ/V2H
> + - const: syscon
>
> reg:
> maxItems: 1
> @@ -73,7 +75,7 @@ additionalProperties: false
> examples:
> - |
> clock-controller@10420000 {
> - compatible = "renesas,r9a09g057-cpg";
> + compatible = "renesas,r9a09g057-cpg", "syscon";
> reg = <0x10420000 0x10000>;
> clocks = <&audio_extal_clk>, <&rtxin_clk>, <&qextal_clk>;
> clock-names = "audio_extal", "rtxin", "qextal";
> --
> 2.43.0
>
