[PATCH v8 3/4] ARM: dts: add RK3288 suspend support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




add pmu sram node for suspend, add global_pwroff pinctrl.
The pmu sram is used to store the resume code.
global_pwroff is held low level at work, it would be pull to high
when entering suspend. reference this in the board DTS file since
some boards need it.
ddrio_pwroff is power switch of ddr_controller, if you want to cut off
power rail of ddr_controller during suspend, please reference it.
ddr0_retention/ddr1_retention are the retention mode switches, if you
want to use the retention mode during suspend, please reference them.

Signed-off-by: Tony Xie <xxx@xxxxxxxxxxxxxx>
Signed-off-by: Chris Zhong <zyw@xxxxxxxxxxxxxx>
Reviewed-by: Doug Anderson <dianders@xxxxxxxxxxxx>
Tested-by: Doug Anderson <dianders@xxxxxxxxxxxx>

---

Changes in v8:
- add ddr pinctrl for suspend

Changes in v7: None
Changes in v6:
- change pmu_intmem@ff720000 to sram@ff720000

Changes in v5:
- change size to 4k

Changes in v4: None
Changes in v3: None
Changes in v2:
- put "rockchip,rk3288-pmu-sram" to first

 arch/arm/boot/dts/rk3288.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index df30437..60bccff 100644
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -482,6 +482,11 @@
 		};
 	};
 
+	sram@ff720000 {
+		compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
+		reg = <0xff720000 0x1000>;
+	};
+
 	pmu: power-management@ff730000 {
 		compatible = "rockchip,rk3288-pmu", "syscon";
 		reg = <0xff730000 0x100>;
@@ -687,6 +692,24 @@
 			bias-disable;
 		};
 
+		sleep {
+			global_pwroff: global-pwroff {
+				rockchip,pins = <0 0 RK_FUNC_1 &pcfg_pull_none>;
+			};
+
+			ddrio_pwroff: ddrio-pwroff {
+				rockchip,pins = <0 1 RK_FUNC_1 &pcfg_pull_none>;
+			};
+
+			ddr0_retention: ddr0-retention {
+				rockchip,pins = <0 2 RK_FUNC_1 &pcfg_pull_up>;
+			};
+
+			ddr1_retention: ddr1-retention {
+				rockchip,pins = <0 3 RK_FUNC_1 &pcfg_pull_up>;
+			};
+		};
+
 		i2c0 {
 			i2c0_xfer: i2c0-xfer {
 				rockchip,pins = <0 15 RK_FUNC_1 &pcfg_pull_none>,
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux