linux-kernel - [PATCH 2/2] mfd: pm8x41: document device tree bindings

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Date:	Tue, 22 Apr 2014 17:31:50 -0700
From:	Courtney Cavin <courtney.cavin@...ymobile.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
CC:	Josh Cartwright <joshc@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-msm@...r.kernel.org>
Subject: [PATCH 2/2] mfd: pm8x41: document device tree bindings

From: Josh Cartwright <joshc@...eaurora.org>

Document the bindings used to describe the Qualcomm 8x41 PMICs.

Signed-off-by: Josh Cartwright <joshc@...eaurora.org>
Signed-off-by: Courtney Cavin <courtney.cavin@...ymobile.com>
---
 Documentation/devicetree/bindings/mfd/pm8x41.txt | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/pm8x41.txt

diff --git a/Documentation/devicetree/bindings/mfd/pm8x41.txt b/Documentation/devicetree/bindings/mfd/pm8x41.txt
new file mode 100644
index 0000000..b865a4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/pm8x41.txt
@@ -0,0 +1,34 @@
+Qualcomm PM8841 and PM8941 PMIC multi-function device bindings
+
+The PM8x41 PMICs are used with the Qualcomm Snapdragon 800 series SoCs, and are
+interfaced to the chip via the SPMI (System Power Management Interface) bus.
+Support for multiple independent functions are implemented by splitting the
+16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
+each.  A function can consume one or more of these fixed-size register regions.
+
+Required properties:
+- compatible: Must be one of:
+     "qcom,pm8841"
+     "qcom,pm8941"
+- reg: Specifies the SPMI USID slave address for this device;
+	See bindings/spmi/spmi.txt
+- #address-cells = <1>
+- #size-cells = <0>
+
+Each child node represents a function of the PM8x41.  Each child 'reg' entry
+describes an offset within the USID slave address where the region starts.
+
+Example:
+
+pm8941@0 {
+	compatible = "qcom,pm8941";
+	reg = <0x0 SPMI_USID>;
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	rtc@...0 {
+		compatible = "...";
+		reg = <0x6000 0x6100>;
+	};
+};
-- 
1.8.1.5

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