From e441d7c1e1c29d23be4fdcab03ec2f077702c75d Mon Sep 17 00:00:00 2001 From: Ravikanth Tuniki Date: Thu, 24 Sep 2020 12:13:18 +0530 Subject: [PATCH] dt-bindings: input: touchscreen: add synaptics_dsx info This change adds the documentation for synaptics_dsx I2C touchscreen driver on Waipio target. Change-Id: I92e089bfad8736e286fd308e98b5b5daf5fefeed --- .../input/touchscreen/synaptics_dsx_i2c.txt | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 bindings/input/touchscreen/synaptics_dsx_i2c.txt diff --git a/bindings/input/touchscreen/synaptics_dsx_i2c.txt b/bindings/input/touchscreen/synaptics_dsx_i2c.txt new file mode 100644 index 00000000..131942dd --- /dev/null +++ b/bindings/input/touchscreen/synaptics_dsx_i2c.txt @@ -0,0 +1,62 @@ +Synaptics DSXV27 touch controller + +Please add this description here: The Synaptics Touch controller is connected to the +host processor via I2C. The controller generates interrupts when the user touches +the panel. The host controller is expected to read the touch coordinates over I2C and +pass the coordinates to the rest of the system. + +Required properties: + + - compatible : should be "synaptics,dsx-i2c". + - reg : i2c slave address of the device. + - interrupt-parent : parent of interrupt. + - synaptics,irq-gpio : irq gpio. + - synaptics,reset-gpio : reset gpio. + - vdd_supply : digital voltage power supply needed to power device. + - avdd_supply : analog voltage power supply needed to power device. + - synaptics,pwr-reg-name : power reg name of digital voltage. + - synaptics,bus-reg-name : bus reg name of analog voltage. + +Optional property: + - synaptics,ub-i2c-addr : addr of ub-i2c. + - synaptics,irq-on-state : status of irq gpio. + - synaptics,cap-button-codes : virtual key code mappings to be used. + - synaptics,vir-button-codes : virtual key code and the response region on panel. + - synaptics,x-flip : modify orientation of the x axis. + - synaptics,y-flip : modify orientation of the y axis. + - synaptics,reset-delay-ms : reset delay for controller (ms), default 100. + - synaptics,power-delay-ms : power delay for controller (ms), default 100. + - synaptics,reset-active-ms : reset active time for controller (ms), default 20. + - synaptics,max-y-for-2d : maximal y value of the panel. + - clock-names : Clock names used for secure touch. They are: "iface_clk", "core_clk" + - clocks : Defined if 'clock-names' DT property is defined. These clocks + are associated with the underlying I2C bus. + +Example: + i2c@78b7000 { + status = "ok"; + synaptics@4b { + compatible = "synaptics,dsx-i2c"; + reg = <0x4b>; + interrupt-parent = <&tlmm>; + interrupts = <65 0x2008>; + vdd_supply = <&pmtitanium_l17>; + avdd_supply = <&pmtitanium_l6>; + synaptics,pwr-reg-name = "vdd"; + synaptics,bus-reg-name = "avdd"; + synaptics,ub-i2c-addr = <0x2c>; + synaptics,irq-gpio = <&tlmm 65 0x2008>; + synaptics,reset-gpio = <&tlmm 99 0x2008>; + synaptics,irq-on-state = <0>; + synaptics,power-delay-ms = <200>; + synaptics,reset-delay-ms = <200>; + synaptics,reset-active-ms = <20>; + synaptics,max-y-for-2d = <1919>; /* remove if no virtual buttons */ + synaptics,cap-button-codes = <139 172 158>; + synaptics,vir-button-codes = <139 180 2000 320 160 172 540 2000 320 160 158 900 2000 320 160>; + /* Underlying clocks used by secure touch */ + clock-names = "iface_clk", "core_clk"; + clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>, + <&clock_gcc clk_gcc_blsp1_qup3_i2c_apps_clk>; + }; + };