| Message ID | 20250210184910.161780-2-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add support to configure CPG block for watchdog on RZ/V2H(P) and RZ/G3E SoCs | expand |
On Mon, 10 Feb 2025 18:49:02 +0000, Prabhakar wrote: > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > The CPG block in the RZ/V2H(P) and RZ/G3E SoCs includes Error Reset Select > Registers (`CPG_ERRORRST_SELm`) and Error Reset Registers > (`CPG_ERROR_RSTm`). The `CPG_ERRORRST_SELm` register must be configured to > trigger a system reset in response to specific error conditions, while the > `CPG_ERROR_RSTm` registers store the error interrupt factors that caused > the system reset. These registers can be used by various IP blocks as > needed. > > For example, in `CPG_ERRORRST_SEL2`, setting `BIT(1)` enables the WDT1 to > issue a system reset upon a watchdog timer underflow. Similarly, `BIT(1)` > in `CPG_ERROR_RST2` indicates whether the system reset was caused by a > WDT1 underflow. This functionality allows the watchdog driver to configure > the CPG_ERRORRST_SEL2 register and determine whether the system booted due > to a `Power-on Reset` or a `Watchdog Reset`. > > Add the `syscon` compatible property to the RZ/V2H(P) and RZ/G3E CPG > blocks, enabling drivers to access the `CPG_ERRORRST_SELm` and > `CPG_ERROR_RSTm` registers as needed. > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > --- > v3->v4 > - Updated commit meessage > > v2->v3 > - No change > > v1->v2 > - No change > --- > .../devicetree/bindings/clock/renesas,rzv2h-cpg.yaml | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-) > Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
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";