From fe37c4b98173ec4b82d3b225d4a7c4d40f77f304 Mon Sep 17 00:00:00 2001 From: Quentin Schulz Date: Wed, 5 Apr 2017 11:06:27 +0200 Subject: [PATCH] dt-bindings: mfd: Add A33 GPADC binding This patch adds documentation for the A33 GPADC binding. Signed-off-by: Quentin Schulz Acked-by: Rob Herring Signed-off-by: Lee Jones --- .../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 000000000000..badff3611a98 --- /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@01c25000 { + 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@01c25000 { + 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>; + };