linux-kernel - [PATCH 2/2] dt-bindings: add devicetree bindings for st-pwm regulator

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Message-Id: <1410959280-29662-3-git-send-email-zyw@rock-chips.com>
Date:	Wed, 17 Sep 2014 21:08:00 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	dianders@...omium.org, heiko@...ech.de
Cc:	huangtao@...k-chips.com, cf@...k-chips.com,
	zhangqing@...k-chips.com, Chris Zhong <zyw@...k-chips.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] dt-bindings: add devicetree bindings for st-pwm regulator

Document the st-pwm regulator

Signed-off-by: Chris Zhong <zyw@...k-chips.com>

---

 .../devicetree/bindings/regulator/st-pwm.txt       |   35 ++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/st-pwm.txt

diff --git a/Documentation/devicetree/bindings/regulator/st-pwm.txt b/Documentation/devicetree/bindings/regulator/st-pwm.txt
new file mode 100644
index 0000000..38fec1d
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/st-pwm.txt
@@ -0,0 +1,35 @@
+st pwm regulator bindings
+
+Required properties:
+  - compatible: "pwm-regulator"
+  - pwms: OF device-tree PWM specification (see PWM binding pwm.txt)
+  - voltage-table: voltage and duty table, include 2 merbers in each set of
+    brackets, first one is voltage(unit: uv), the next is duty(unit: percent)
+  - pwm-reg-period: duration (in nanoseconds) of one cycle
+
+Any property defined as part of the core regulator binding defined in
+regulator.txt can also be used.
+
+Example:
+	pwm_regulator {
+                compatible = "st,b2105-pwm-regulator;
+                pwms = <&pwm1 0 1000000 0>;
+
+		voltage-table = <1114000 0>,
+				<1095000 10>,
+				<1076000 20>,
+				<1056000 30>,
+				<1036000 40>,
+				<1016000 50>;
+
+		pwm-reg-period = <8448>;
+		regulators {
+			vdd_logic: pwm-regulator {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-min-microvolt = <1016000>;
+				regulator-max-microvolt = <1114000>;
+				regulator-name = "vdd_logic";
+			};
+		};
+	};
-- 
1.7.9.5

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