[PATCH v4 0/2] Add power domain support for eMMC node on rk3399

[PATCH v4 0/2] Add power domain support for eMMC node on rk3399

[Ziyuan Xu]

This series add power domain for eMMC node which will be controlled by
genpd to make sure it's available in probing state, and will be gate
once suspend/resume.

Changes in v4:
- add heiko's review-tag

Changes in v3:
- fix a typo
- add Rob's ack-tag

Changes in v2:
- fix a typo
- add an example code for power-domain
- add Shawn's review-tag and Doug's review-tag

Ziyuan Xu (2):
  Documentation: mmc: sdhci-of-arasan: add description of power domain
  arm64: dts: rockchip: add eMMC's power domain support for rk3399

 Documentation/devicetree/bindings/mmc/arasan,sdhci.txt |  7 ++++++-
 arch/arm64/boot/dts/rockchip/rk3399.dtsi               | 11 +++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

-- 
2.9.3


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[PATCH v4 1/2] Documentation: mmc: sdhci-of-arasan: add description of power domain

[Ziyuan Xu]

Add power domain as a optional property for sdhci-of-arasan, which can
be turned off in the so-called unused condition, such as suspend and
remove. Aim to lower power requirements.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

---

Changes in v4:
- add heiko's review-tag

Changes in v3:
- fix a typo
- add Rob's ack-tag

Changes in v2:
- fix a typo
- add an example code for power-domain

 Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index 3404afa..eb84d29 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -1,12 +1,14 @@
 Device Tree Bindings for the Arasan SDHCI Controller
 
-  The bindings follow the mmc[1], clock[2], interrupt[3] and phy[4] bindings.
+  The bindings follow the mmc[1], clock[2], interrupt[3], phy[4] and power
+  domain[5] bindings.
   Only deviations are documented here.
 
   [1] Documentation/devicetree/bindings/mmc/mmc.txt
   [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
   [3] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
   [4] Documentation/devicetree/bindings/phy/phy-bindings.txt
+  [5] Documentation/devicetree/bindings/power/power_domain.txt
 
 Required Properties:
   - compatible: Compatibility string.  One of:
@@ -36,6 +38,8 @@ Optional Properties:
   - #clock-cells: If specified this should be the value <0>.  With this property
     in place we will export a clock representing the Card Clock.  This clock
     is expected to be consumed by our PHY.  You must also specify
+  - power-domains: A phandle and PM domain as specifier defined by bindings
+    of the power controller specified by phandle.
 
 Example:
 	sdhci@e0100000 {
@@ -71,5 +75,6 @@ Example:
 		phys = <&emmc_phy>;
 		phy-names = "phy_arasan";
 		#clock-cells = <0>;
+		power-domains = <&power RK3399_PD_EMMC>;
 		status = "disabled";
 	};
-- 
2.9.3

[PATCH v4 2/2] arm64: dts: rockchip: add eMMC's power domain support for rk3399

[Ziyuan Xu]

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

Signed-off-by: Elaine Zhang <zhangqing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Signed-off-by: Ziyuan Xu <xzy.xu-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Douglas Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>

---

Changes in v4: None
Changes in v3: None
Changes in v2:
- add Shawn's review-tag and Doug's review-tag

 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 76b2864..13905ce 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -269,6 +269,7 @@
 		#clock-cells = <0>;
 		phys = <&emmc_phy>;
 		phy-names = "phy_arasan";
+		power-domains = <&power RK3399_PD_EMMC>;
 		status = "disabled";
 	};
 
@@ -690,6 +691,11 @@
 		status = "disabled";
 	};
 
+	qos_emmc: qos@ffa58000 {
+		compatible = "syscon";
+		reg = <0x0 0xffa58000 0x0 0x20>;
+	};
+
 	qos_gmac: qos@ffa5c000 {
 		compatible = "syscon";
 		reg = <0x0 0xffa5c000 0x0 0x20>;
@@ -823,6 +829,11 @@
 			};
 
 			/* These power domains are grouped by VD_LOGIC */
+			pd_emmc@RK3399_PD_EMMC {
+				reg = <RK3399_PD_EMMC>;
+				clocks = <&cru ACLK_EMMC>;
+				pm_qos = <&qos_emmc>;
+			};
 			pd_gmac@RK3399_PD_GMAC {
 				reg = <RK3399_PD_GMAC>;
 				clocks = <&cru ACLK_GMAC>;
-- 
2.9.3


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