Hi Prabhakar,
> -----Original Message-----
> From: Prabhakar <prabhakar.csengg@xxxxxxxxx>
> Sent: Tuesday, October 8, 2024 5:50 PM
> Subject: [PATCH v2] arm64: dts: renesas: r9a09g057: Add OPP table
>
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Add OPP table for RZ/V2H(P) SoC.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> ---
> v1->v2
> - Set opp-microvolt to 800000 for frequencies below 1.1GHz
> ---
> arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 41 ++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> index 1ad5a1b6917f..4bbe75b81f54 100644
> --- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> @@ -20,6 +20,39 @@ audio_extal_clk: audio-clk {
> clock-frequency = <0>;
> };
>
> + /*
> + * The default cluster table is based on the assumption that the PLLCA55 clock
> + * frequency is set to 1.7GHz. The PLLCA55 clock frequency can be set to
> + * 1.7/1.6/1.5/1.1 GHz based on the BOOTPLLCA_0/1 pins (and additionally can be
> + * clocked to 1.8GHz as well). The table below should be overridden in the board
> + * DTS based on the PLLCA55 clock frequency.
> + */
> + cluster0_opp: opp-table-0 {
> + compatible = "operating-points-v2";
> +
> + opp-1700000000 {
> + opp-hz = /bits/ 64 <1700000000>;
> + opp-microvolt = <900000>;
Not sure CA-55 can change voltage from 800mV to 900mV??
Based on Power Domain Control, it needs to be in AWO mode for changing the PD_CA55 voltage.
The manual says OD voltage is 0.9V and ND voltage is 0.8V.
Is 1.7GHZ is ND or OD?
Cheers,
Biju
> + clock-latency-ns = <300000>;
> + };
> + opp-850000000 {
> + opp-hz = /bits/ 64 <850000000>;
> + opp-microvolt = <800000>;
> + clock-latency-ns = <300000>;
> + };
> + opp-425000000 {
> + opp-hz = /bits/ 64 <425000000>;
> + opp-microvolt = <800000>;
> + clock-latency-ns = <300000>;
> + };
> + opp-212500000 {
> + opp-hz = /bits/ 64 <212500000>;
> + opp-microvolt = <800000>;
> + clock-latency-ns = <300000>;
> + opp-suspend;
> + };
> + };
> +
> cpus {
> #address-cells = <1>;
> #size-cells = <0>;
> @@ -30,6 +63,8 @@ cpu0: cpu@0 {
> device_type = "cpu";
> next-level-cache = <&L3_CA55>;
> enable-method = "psci";
> + clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK0>;
> + operating-points-v2 = <&cluster0_opp>;
> };
>
> cpu1: cpu@100 {
> @@ -38,6 +73,8 @@ cpu1: cpu@100 {
> device_type = "cpu";
> next-level-cache = <&L3_CA55>;
> enable-method = "psci";
> + clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK1>;
> + operating-points-v2 = <&cluster0_opp>;
> };
>
> cpu2: cpu@200 {
> @@ -46,6 +83,8 @@ cpu2: cpu@200 {
> device_type = "cpu";
> next-level-cache = <&L3_CA55>;
> enable-method = "psci";
> + clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK2>;
> + operating-points-v2 = <&cluster0_opp>;
> };
>
> cpu3: cpu@300 {
> @@ -54,6 +93,8 @@ cpu3: cpu@300 {
> device_type = "cpu";
> next-level-cache = <&L3_CA55>;
> enable-method = "psci";
> + clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK3>;
> + operating-points-v2 = <&cluster0_opp>;
> };
>
> L3_CA55: cache-controller-0 {
> --
> 2.43.0
