linux-kernel - [PATCH v3 04/11] Documentation: DT: bindings: mfd: add A33 GPADC binding

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Message-Id: <20170321153611.16228-5-quentin.schulz@free-electrons.com>
Date:   Tue, 21 Mar 2017 16:36:04 +0100
From:   Quentin Schulz <quentin.schulz@...e-electrons.com>
To:     dmitry.torokhov@...il.com, robh+dt@...nel.org,
        mark.rutland@....com, maxime.ripard@...e-electrons.com,
        wens@...e.org, lee.jones@...aro.org, linux@...linux.org.uk,
        jic23@...nel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net
Cc:     Quentin Schulz <quentin.schulz@...e-electrons.com>,
        thomas.petazzoni@...e-electrons.com, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-sunxi@...glegroups.com, icenowy@...c.xyz
Subject: [PATCH v3 04/11] Documentation: DT: bindings: mfd: add A33 GPADC binding

This patch adds documentation for the A33 GPADC binding.

Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
---

v3:
  - fixed missing allwinner in front of compatible,
  - updated compatible to allwinner,sun8i-a33-ths to better reflect the
  datasheet's name,
  - updated example's DT node name and label to ths,

added in v2

 .../devicetree/bindings/mfd/sun4i-gpadc.txt        | 59 ++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt

diff --git a/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt b/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt
new file mode 100644
index 0000000..badff36
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt
@@ -0,0 +1,59 @@
+Allwinner SoCs' GPADC Device Tree bindings
+------------------------------------------
+The Allwinner SoCs all have an ADC that can also act as a thermal sensor
+and sometimes as a touchscreen controller.
+
+Required properties:
+  - compatible: "allwinner,sun8i-a33-ths",
+  - reg: mmio address range of the chip,
+  - #thermal-sensor-cells: shall be 0,
+  - #io-channel-cells: shall be 0,
+
+Example:
+	ths: ths@...25000 {
+		compatible = "allwinner,sun8i-a33-ths";
+		reg = <0x01c25000 0x100>;
+		#thermal-sensor-cells = <0>;
+		#io-channel-cells = <0>;
+	};
+
+sun4i, sun5i and sun6i SoCs are also supported via the older binding:
+
+sun4i resistive touchscreen controller
+--------------------------------------
+
+Required properties:
+ - compatible: "allwinner,sun4i-a10-ts", "allwinner,sun5i-a13-ts" or
+   "allwinner,sun6i-a31-ts"
+ - reg: mmio address range of the chip
+ - interrupts: interrupt to which the chip is connected
+ - #thermal-sensor-cells: shall be 0
+
+Optional properties:
+ - allwinner,ts-attached	 : boolean indicating that an actual touchscreen
+				   is attached to the controller
+ - allwinner,tp-sensitive-adjust : integer (4 bits)
+				   adjust sensitivity of pen down detection
+				   between 0 (least sensitive) and 15
+				   (defaults to 15)
+ - allwinner,filter-type	 : integer (2 bits)
+				   select median and averaging filter
+				   samples used for median / averaging filter
+				   0: 4/2
+				   1: 5/3
+				   2: 8/4
+				   3: 16/8
+				   (defaults to 1)
+
+Example:
+
+	rtp: rtp@...25000 {
+		compatible = "allwinner,sun4i-a10-ts";
+		reg = <0x01c25000 0x100>;
+		interrupts = <29>;
+		allwinner,ts-attached;
+		#thermal-sensor-cells = <0>;
+		/* sensitive/noisy touch panel */
+		allwinner,tp-sensitive-adjust = <0>;
+		allwinner,filter-type = <3>;
+	};
-- 
2.9.3