[v3,2/2] ASoC: cs35l33: Add device tree bindings file for cs35l33

Commit Message

Paul Handrigan May 13, 2016, 8:50 p.m. UTC

From: Paul Handrigan <[e-mail]>

Add device tree bindings file for the cs35l33 8V boosted
class D amplifier.

Signed-off-by: Paul Handrigan <[e-mail]>
---
 .../devicetree/bindings/sound/cs35l33.txt          | 73 ++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cs35l33.txt

Patch

diff --git a/Documentation/devicetree/bindings/sound/cs35l33.txt b/Documentation/devicetree/bindings/sound/cs35l33.txt
new file mode 100644
index 0000000..273d73a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cs35l33.txt
@@ -0,0 +1,73 @@ 
+CS35L33 Speaker Amplifier
+
+Required properties:
+
+  - compatible : "cirrus,cs35l33"
+
+  - reg : the I2C address of the device for I2C
+
+  - VA-supply, VP-supply : power supplies for the device,
+    as covered in
+    Documentation/devicetree/bindings/regulator/regulator.txt.
+
+Optional properties:
+
+  - reset-gpios : gpio used to reset the amplifier
+
+  - interrupt-parent : Specifies the phandle of the interrupt controller to
+    which the IRQs from CS35L33 are delivered to.
+ -  interrupts : IRQ line info CS35L33.
+    (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+    for further information relating to interrupt properties)
+
+  - boost-ctl : Booster voltage use to supply the amp. If the value is
+    0, then VBST = VP. If greater than 0, the boost voltage will be 3.3V with
+    a value of 1 and will increase at a step size of 0.1V until a maximum of
+    8.0V.
+
+  - ramp-rate : On power up, it affects the time from when the power
+    up sequence begins to the time the audio reaches a full-scale output.
+    On power down, it affects the time from when the power-down sequence
+    begins to when the amplifier disables the PWM outputs. If this property
+    is not set then soft ramping will be disabled and ramp time would be
+    20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms,
+    60ms,100ms,175ms respectively for 48KHz sample rate.
+
+  - boost-ipk : The maximum current allowed for the boost converter.
+    The range starts at 1.85A (0xF0) and goes to a maximum of 3.60A (0xE0)
+    with a step size of 0.015625A. The default is 2.50A (0x90).
+
+  - hg-algo : Parameters for internal Class H/G algorithm that
+    controls the amplifier supplies.
+
+Example:
+
+cs35l33: cs35l33@40 {
+	compatible = "cirrus,cs35l33";
+	reg = <0x40>;
+
+	VA-supply = <&ldo5_reg>;
+	VP-supply = <&ldo5_reg>;
+
+	interrupt-parent = <&gpio8>;
+	interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+
+	reset-gpios = <&cs47l91 34 0>;
+
+	ramp-rate = <0x0>;
+	boost-ctl = <0x30>;  /* VBST = 8.0V */
+	boost-ipk = <0xE0>; /* 3.60A */
+
+	hg-algo {
+		mem-depth = <0x3>;
+		release-rate = <0x3>;
+		hd-rm = <0xA>;
+		ldo-thld = <0x1>;
+		ldo-path-disable = <0x0>;
+		ldo-entry-delay=<0x4>;
+		vp-hg-auto;
+		vp-hg=<0xF>;
+		vp-hg-rate=<0x2>;
+		vp-hg-va=<0x0>;
+	};
+};