[v5,5/6] ARM: rockchip: Add pmu-sram binding
diff mbox

Message ID 1414417650-19402-6-git-send-email-zyw@rock-chips.com
State New, archived
Headers show

Commit Message

Chris Zhong Oct. 27, 2014, 1:47 p.m. UTC
The pmu-sram is used to store resume code, suspend/resume need get the
address of it. Therefore add a binding and documentation for it.

Signed-off-by: Tony Xie <xxx@rock-chips.com>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>

---

Changes in v5:
- change the size of sram in example

Changes in v4: None
Changes in v3: None
Changes in v2: None

 .../devicetree/bindings/arm/rockchip/pmu-sram.txt  |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt

Comments

Douglas Anderson Oct. 27, 2014, 5:49 p.m. UTC | #1
Chris,

On Mon, Oct 27, 2014 at 6:47 AM, Chris Zhong <zyw@rock-chips.com> wrote:
> The pmu-sram is used to store resume code, suspend/resume need get the
> address of it. Therefore add a binding and documentation for it.
>
> Signed-off-by: Tony Xie <xxx@rock-chips.com>
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>

Meant to add my Reviewed-by to v5...

Reviewed-by: Doug Anderson <dianders@chromium.org>

Patch
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diff --git a/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt b/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt
new file mode 100644
index 0000000..e764b9c
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt
@@ -0,0 +1,16 @@ 
+Rockchip SRAM for pmu:
+------------------------------
+
+The sram of pmu is used to store the function of resume from maskrom(the 1st
+level loader). This is a common use of the "pmu-sram" because it keeps power
+even in low power states in the system.
+
+Required node properties:
+- compatible : should be "rockchip,rk3288-pmu-sram"
+- reg : physical base address and the size of the registers window
+
+Example:
+	pmu_intmem@ff720000 {
+		compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
+		reg = <0xff720000 0x1000>;
+	};