[PATCH 3/4] Input: tsc2004 - Add support for tsc2004

Michael Welling
2015-10-31T00:42:49Z

Adds support for the i2c based tsc2004.

Signed-off-by: Michael Welling <mwelling@ieee.org>
---
drivers/input/touchscreen/Kconfig | 13 ++++++
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/tsc2004.c | 86 +++++++++++++++++++++++++++++++++++++
3 files changed, 100 insertions(+)
create mode 100644 drivers/input/touchscreen/tsc2004.c

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 6a5878b..ae33da7 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -942,6 +942,19 @@ config TOUCHSCREEN_TSC_SERIO
config TOUCHSCREEN_TSC200X_CORE
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
tristate "TSC2005 based touchscreens"
depends on SPI_MASTER
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 03179f2..cbaa6ab 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o
obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE) += tsc200x-core.o
+obj-$(CONFIG_TOUCHSCREEN_TSC2004) += tsc2004.o
obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
diff --git a/drivers/input/touchscreen/tsc2004.c b/drivers/input/touchscreen/tsc2004.c
new file mode 100644
index 0000000..d2f7a6b
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2004.c
@@ -0,0 +1,86 @@
+/*
+ * 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/pm.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");
--
2.1.4