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

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Message-Id: <20220401145820.1003826-4-krzysztof.kozlowski@linaro.org>
Date:   Fri,  1 Apr 2022 16:58:19 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Bean Huo <beanhuo@...ron.com>,
        Bart Van Assche <bvanassche@....org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [RFC PATCH 3/4] arm64: dts: qcom: sdm845: control RPMHPD performance states with UFS

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.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 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@...000 {
 			#clock-cells = <1>;
 			#reset-cells = <1>;
 			#power-domain-cells = <1>;
+			power-domains = <&rpmhpd SDM845_CX>;
 		};
 
 		qfprom@...000 {
@@ -2336,8 +2337,22 @@ ufs_mem_hc: ufshc@...4000 {
 				<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@...7000 {
-- 
2.32.0