Re: [RFC PATCH 3/4] arm64: dts: qcom: sdm845: control RPMHPD performance states with UFS

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On 01/04/2022 17:58, Krzysztof Kozlowski wrote:
UFS, when scaling gears, should choose appropriate performance state of
RPMHPD power domain controller.  Since UFS belongs to UFS_PHY_GDSC power
domain, add necessary parent power domain to GCC.

This will cause all gcc GDSCs to be rooted in the CX. Are we sure that this is an expected (and correct) change?


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
  arch/arm64/boot/dts/qcom/sdm845.dtsi | 17 ++++++++++++++++-
  1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index b31bf62e8680..c999b41c2605 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -1078,6 +1078,7 @@ gcc: clock-controller@100000 {
  			#clock-cells = <1>;
  			#reset-cells = <1>;
  			#power-domain-cells = <1>;
+			power-domains = <&rpmhpd SDM845_CX>;
  		};
qfprom@784000 {
@@ -2336,8 +2337,22 @@ ufs_mem_hc: ufshc@1d84000 {
  				<0 0>,
  				<0 0>,
  				<0 300000000>;
-
+			operating-points-v2 = <&ufs_opp_table>;
  			status = "disabled";
+
+			ufs_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-50000000 {
+					opp-hz = /bits/ 64 <50000000>;
+					required-opps = <&rpmhpd_opp_svs>;
+				};
+
+				opp-200000000 {
+					opp-hz = /bits/ 64 <200000000>;
+					required-opps = <&rpmhpd_opp_nom>;
+				};
+			};
  		};
ufs_mem_phy: phy@1d87000 {


--
With best wishes
Dmitry



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