From 3d59187efc982bf20309ae2fb8514007f9bf2b4e Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 16 Sep 2022 16:01:24 +0530 Subject: [PATCH] arm64: dts: qcom: sc7280: Add required-opps for USB USB has a requirement to put a performance state vote on 'cx' while active. Use 'required-opps' to pass this information from device tree, and since all the GDSCs in GCC (including USB) are sub-domains of cx, we also add cx as a power-domain for GCC. Now when any of the consumers of the GDSCs (in this case USB) votes on a perforamance state, genpd framework can identify that the GDSC itself does not support a performance state and it then propogates the vote to the parent, which in this case is cx. This change would also mean that any GDSC in GCC thats left enabled during low power state (perhaps because its marked with a ALWAYS_ON flag) can prevent the system from entering low power since that would prevent cx from transitioning to low power. Ideally any consumers that would need to have their devices (partially) powered to support wakeups should look at making the resp. GDSCs transtion to a Retention (PWRSTS_RET) state instead of leaving them ALWAYS_ON. Signed-off-by: Rajendra Nayak Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20220916103124.30581-1-quic_rjendra@quicinc.com --- arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi index 16cf0c6..4489a77 100644 --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi @@ -829,6 +829,7 @@ #clock-cells = <1>; #reset-cells = <1>; #power-domain-cells = <1>; + power-domains = <&rpmhpd SC7280_CX>; }; ipcc: mailbox@408000 { @@ -3388,6 +3389,7 @@ "dm_hs_phy_irq"; power-domains = <&gcc GCC_USB30_SEC_GDSC>; + required-opps = <&rpmhpd_opp_nom>; resets = <&gcc GCC_USB30_SEC_BCR>; @@ -3650,6 +3652,7 @@ "ss_phy_irq"; power-domains = <&gcc GCC_USB30_PRIM_GDSC>; + required-opps = <&rpmhpd_opp_nom>; resets = <&gcc GCC_USB30_PRIM_BCR>; -- 2.7.4