linux-kernel - [PATCH 2/2] arm64: dts: rockchip: add eMMC's power domain support for rk3399

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Date:   Sat, 27 Aug 2016 21:41:03 +0800
From:   Ziyuan Xu <xzy.xu@...k-chips.com>
To:     ulf.hansson@...aro.org, robh+dt@...nel.org, heiko@...ech.de
Cc:     linux-rockchip@...ts.infradead.org,
        Ziyuan Xu <xzy.xu@...k-chips.com>,
        Elaine Zhang <zhangqing@...k-chips.com>,
        devicetree@...r.kernel.org, David Wu <david.wu@...k-chips.com>,
        Caesar Wang <wxt@...k-chips.com>,
        Frank Wang <frank.wang@...k-chips.com>,
        Brian Norris <briannorris@...omium.org>,
        linux-kernel@...r.kernel.org,
        Shunqian Zheng <zhengsq@...k-chips.com>,
        Douglas Anderson <dianders@...omium.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Will Deacon <will.deacon@....com>,
        Jianqun Xu <jay.xu@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Xing Zheng <zhengxing@...k-chips.com>
Subject: [PATCH 2/2] arm64: dts: rockchip: add eMMC's power domain support for rk3399

Control power domain for eMMC via genpd to reduce power consumption.

Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
Signed-off-by: Ziyuan Xu <xzy.xu@...k-chips.com>

---

 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 32aebc8..71733d4 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -239,6 +239,7 @@
 		#clock-cells = <0>;
 		phys = <&emmc_phy>;
 		phy-names = "phy_arasan";
+		power-domains = <&power RK3399_PD_EMMC>;
 		status = "disabled";
 	};
 
@@ -611,6 +612,11 @@
 		status = "disabled";
 	};
 
+	qos_emmc: qos@...58000 {
+		compatible = "syscon";
+		reg = <0x0 0xffa58000 0x0 0x20>;
+	};
+
 	qos_hdcp: qos@...90000 {
 		compatible = "syscon";
 		reg = <0x0 0xffa90000 0x0 0x20>;
@@ -739,6 +745,11 @@
 			};
 
 			/* These power domains are grouped by VD_LOGIC */
+			pd_emmc@...399_PD_EMMC {
+				reg = <RK3399_PD_EMMC>;
+				clocks = <&cru ACLK_EMMC>;
+				pm_qos = <&qos_emmc>;
+			};
 			pd_vio@...399_PD_VIO {
 				reg = <RK3399_PD_VIO>;
 				#address-cells = <1>;
-- 
2.9.2