Re: [PATCH v2 2/3] arm64: dts: qcom: sm8450: Add opp-level to indicate PCIe data rates

From: Viresh Kumar
Date: Mon Aug 18 2025 - 05:04:48 EST


On 18-08-25, 13:52, Krishna Chaitanya Chundru wrote:
> @@ -2210,45 +2213,67 @@ pcie1_opp_table: opp-table {
> compatible = "operating-points-v2";
>
> /* GEN 1 x1 */
> - opp-2500000 {
> + opp-2500000-1 {

Why mention -1 here when there is only one entry with this freq value
?

> opp-hz = /bits/ 64 <2500000>;
> required-opps = <&rpmhpd_opp_low_svs>;
> opp-peak-kBps = <250000 1>;
> + opp-level = <1>;
> };
>
> - /* GEN 1 x2 and GEN 2 x1 */
> - opp-5000000 {
> + /* GEN 1 x2 */
> + opp-5000000-1 {
> + opp-hz = /bits/ 64 <5000000>;
> + required-opps = <&rpmhpd_opp_low_svs>;
> + opp-peak-kBps = <500000 1>;
> + opp-level = <1>;
> + };
> +
> + /* GEN 2 x1 */
> + opp-5000000-2 {
> opp-hz = /bits/ 64 <5000000>;
> required-opps = <&rpmhpd_opp_low_svs>;
> opp-peak-kBps = <500000 1>;
> + opp-level = <2>;
> };

This looks okay.

>
> /* GEN 2 x2 */
> - opp-10000000 {
> + opp-10000000-2 {

Why -2 here ?

> opp-hz = /bits/ 64 <10000000>;
> required-opps = <&rpmhpd_opp_low_svs>;
> opp-peak-kBps = <1000000 1>;
> + opp-level = <2>;
> };
>
> /* GEN 3 x1 */
> - opp-8000000 {
> + opp-8000000-3 {

same.

> opp-hz = /bits/ 64 <8000000>;
> required-opps = <&rpmhpd_opp_nom>;
> opp-peak-kBps = <984500 1>;
> + opp-level = <3>;
> + };
> +
> + /* GEN 3 x2 */
> + opp-16000000-3 {

Shouldn't this be opp-16000000-1 only ? This is the first occurrence
16000000.

> + opp-hz = /bits/ 64 <16000000>;
> + required-opps = <&rpmhpd_opp_nom>;
> + opp-peak-kBps = <1969000 1>;
> + opp-level = <3>;
> };
>
> - /* GEN 3 x2 and GEN 4 x1 */
> - opp-16000000 {
> + /* GEN 4 x1 */
> + opp-16000000-4 {

opp-16000000-2 ?

--
viresh