linux-kernel - [PATCH v7 3/5] ARM: rockchip: Add pmu-sram binding

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Message-Id: <1415368177-6637-4-git-send-email-zyw@rock-chips.com>
Date:	Fri,  7 Nov 2014 21:49:35 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	heiko@...ech.de, dianders@...omium.org
Cc:	mturquette@...aro.org,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Linus Walleij <linus.walleij@...aro.org>, khilman@...nel.org,
	linux-rockchip@...ts.infradead.org,
	Chris Zhong <zyw@...k-chips.com>,
	Tony Xie <xxx@...k-chips.com>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v7 3/5] ARM: rockchip: Add pmu-sram binding

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@...k-chips.com>
Signed-off-by: Chris Zhong <zyw@...k-chips.com>
Reviewed-by: Doug Anderson <dianders@...omium.org>

---

Changes in v7: None
Changes in v6:
- change pmu_intmem@...20000 to sram@...20000

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

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..6b42fda
--- /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:
+	sram@...20000 {
+		compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
+		reg = <0xff720000 0x1000>;
+	};
-- 
1.9.1

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