ARM: dts: rockchip: add RK3288 suspend support

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.

Signed-off-by: Tony Xie <xxx@rock-chips.com>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 3aad41d873d3026ad922461f24325b0eca4295d8..2a878a35faccd41377b1d4c2f77d78611716a7d3 100644 (file)
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -506,6 +506,11 @@
                };
        };
 
+       sram@ff720000 {
+               compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
+               reg = <0xff720000 0x1000>;
+       };
+
        pmu: power-management@ff730000 {
                compatible = "rockchip,rk3288-pmu", "syscon";
                reg = <0xff730000 0x100>;
@@ -729,6 +734,24 @@
                        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>,