Input: tsc2004 - add support for tsc2004 (a748941c) · Commits · e / devices / android_kernel_xiaomi_nabu

Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt

+28 −6

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	* Texas Instruments tsc2005 touchscreen controller		* Texas Instruments tsc2004 and tsc2005 touchscreen controllers

	Required properties:		Required properties:
	- compatible : "ti,tsc2005"		- compatible : "ti,tsc2004" or "ti,tsc2005"
	- reg : SPI device address		- reg : Device address
	- spi-max-frequency : Maximal SPI speed
	- interrupts : IRQ specifier		- interrupts : IRQ specifier
	- reset-gpios : GPIO specifier		- spi-max-frequency : Maximum SPI clocking speed of the device
	- vio-supply : Regulator specifier		(for tsc2005)

	Optional properties:		Optional properties:
			- vio-supply : Regulator specifier
			- reset-gpios : GPIO specifier for the controller reset line
	- ti,x-plate-ohms : integer, resistance of the touchscreen's X plates		- ti,x-plate-ohms : integer, resistance of the touchscreen's X plates
	in ohm (defaults to 280)		in ohm (defaults to 280)
	- ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after		- ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
	@@ -18,6 +19,27 @@ Optional properties:

	Example:		Example:

			&i2c3 {
			tsc2004@48 {
			compatible = "ti,tsc2004";
			reg = <0x48>;
			vio-supply = <&vio>;

			reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
			interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;

			touchscreen-fuzz-x = <4>;
			touchscreen-fuzz-y = <7>;
			touchscreen-fuzz-pressure = <2>;
			touchscreen-size-x = <4096>;
			touchscreen-size-y = <4096>;
			touchscreen-max-pressure = <2048>;

			ti,x-plate-ohms = <280>;
			ti,esd-recovery-timeout-ms = <8000>;
			};
			}

	&mcspi1 {		&mcspi1 {
	tsc2005@0 {		tsc2005@0 {
	compatible = "ti,tsc2005";		compatible = "ti,tsc2005";

drivers/input/touchscreen/Kconfig

+13 −0

Original line number	Original line	Diff line number	Diff line
	@@ -942,6 +942,19 @@ config TOUCHSCREEN_TSC_SERIO
	config TOUCHSCREEN_TSC200X_CORE		config TOUCHSCREEN_TSC200X_CORE
	tristate		tristate

			config TOUCHSCREEN_TSC2004
			tristate "TSC2004 based touchscreens"
			depends on I2C
			select REGMAP_I2C
			select TOUCHSCREEN_TSC200X_CORE
			help
			Say Y here if you have a TSC2004 based touchscreen.

			If unsure, say N.

			To compile this driver as a module, choose M here: the
			module will be called tsc2004.

	config TOUCHSCREEN_TSC2005		config TOUCHSCREEN_TSC2005
	tristate "TSC2005 based touchscreens"		tristate "TSC2005 based touchscreens"
	depends on SPI_MASTER		depends on SPI_MASTER

drivers/input/touchscreen/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -70,6 +70,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
	obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o		obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
	obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o		obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o
	obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE) += tsc200x-core.o		obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE) += tsc200x-core.o
			obj-$(CONFIG_TOUCHSCREEN_TSC2004) += tsc2004.o
	obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o		obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
	obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o		obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
	obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o		obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o

drivers/input/touchscreen/tsc2004.c

0 → 100644

+83 −0

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			/*
			* TSC2004 touchscreen driver
			*
			* Copyright (C) 2015 QWERTY Embedded Design
			* Copyright (C) 2015 EMAC Inc.
			*
			* This program is free software; you can redistribute it and/or modify
			* it under the terms of the GNU General Public License as published by
			* the Free Software Foundation; either version 2 of the License, or
			* (at your option) any later version.
			*
			* This program is distributed in the hope that it will be useful,
			* but WITHOUT ANY WARRANTY; without even the implied warranty of
			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			* GNU General Public License for more details.
			*/

			#include <linux/module.h>
			#include <linux/input.h>
			#include <linux/of.h>
			#include <linux/i2c.h>
			#include <linux/regmap.h>
			#include "tsc200x-core.h"

			static int tsc2004_cmd(struct device *dev, u8 cmd)
			{
			u8 tx = TSC200X_CMD \| TSC200X_CMD_12BIT \| cmd;
			s32 data;
			struct i2c_client *i2c = to_i2c_client(dev);

			data = i2c_smbus_write_byte(i2c, tx);
			if (data < 0) {
			dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
			__func__, cmd, data);
			return data;
			}

			return 0;
			}

			static int tsc2004_probe(struct i2c_client *i2c,
			const struct i2c_device_id *id)

			{
			return tsc200x_probe(&i2c->dev, i2c->irq, BUS_I2C,
			devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
			tsc2004_cmd);
			}

			static int tsc2004_remove(struct i2c_client *i2c)
			{
			return tsc200x_remove(&i2c->dev);
			}

			static const struct i2c_device_id tsc2004_idtable[] = {
			{ "tsc2004", 0 },
			{ }
			};
			MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);

			#ifdef CONFIG_OF
			static const struct of_device_id tsc2004_of_match[] = {
			{ .compatible = "ti,tsc2004" },
			{ /* sentinel */ }
			};
			MODULE_DEVICE_TABLE(of, tsc2004_of_match);
			#endif

			static struct i2c_driver tsc2004_driver = {
			.driver = {
			.name = "tsc2004",
			.of_match_table = of_match_ptr(tsc2004_of_match),
			.pm = &tsc200x_pm_ops,
			},
			.id_table = tsc2004_idtable,
			.probe = tsc2004_probe,
			.remove = tsc2004_remove,
			};
			module_i2c_driver(tsc2004_driver);

			MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
			MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
			MODULE_LICENSE("GPL");