Commit af5689fb authored by Jonathan Neuschäfer's avatar Jonathan Neuschäfer Committed by Dmitry Torokhov
Browse files

Input: ektf2127 - add support for eKTF2132 touchscreen 



The eKTF2132 is a touchscreen controller found, for example, in the Kobo
Aura ebook reader. It is similar to the ektf2127, but it uses a different
packet type to report touch events.

Signed-off-by: default avatarJonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20201106112412.390724-3-j.neuschaefer@gmx.net


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent cdab490e

drivers/input/touchscreen/ektf2127.c

+31 −1
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#define EKTF2127_RESPONSE		0x52

#define EKTF2127_REQUEST		0x53

#define EKTF2127_HELLO			0x55

#define EKTF2127_REPORT2		0x5a

#define EKTF2127_REPORT			0x5d

#define EKTF2127_CALIB_DONE		0x66
@@ -95,6 +96,29 @@ static void ektf2127_report_event(struct ektf2127_ts *ts, const u8 *buf) 
	input_sync(ts->input);

}



static void ektf2127_report2_contact(struct ektf2127_ts *ts, int slot,

				     const u8 *buf, bool active)

{

	input_mt_slot(ts->input, slot);

	input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, active);



	if (active) {

		int x = (buf[0] & 0xf0) << 4 | buf[1];

		int y = (buf[0] & 0x0f) << 8 | buf[2];



		touchscreen_report_pos(ts->input, &ts->prop, x, y, true);

	}

}



static void ektf2127_report2_event(struct ektf2127_ts *ts, const u8 *buf)

{

	ektf2127_report2_contact(ts, 0, &buf[1], !!(buf[7] & 2));

	ektf2127_report2_contact(ts, 1, &buf[4], !!(buf[7] & 4));



	input_mt_sync_frame(ts->input);

	input_sync(ts->input);

}



static irqreturn_t ektf2127_irq(int irq, void *dev_id)

{

	struct ektf2127_ts *ts = dev_id;
@@ -113,6 +137,10 @@ static irqreturn_t ektf2127_irq(int irq, void *dev_id) 
		ektf2127_report_event(ts, buf);

		break;



	case EKTF2127_REPORT2:

		ektf2127_report2_event(ts, buf);

		break;



	case EKTF2127_NOISE:

		if (buf[1] == EKTF2127_ENV_NOISY)

			dev_dbg(dev, "Environment is electrically noisy\n");
@@ -305,6 +333,7 @@ static int ektf2127_probe(struct i2c_client *client, 
#ifdef CONFIG_OF

static const struct of_device_id ektf2127_of_match[] = {

	{ .compatible = "elan,ektf2127" },

	{ .compatible = "elan,ektf2132" },

	{}

};

MODULE_DEVICE_TABLE(of, ektf2127_of_match);
@@ -312,6 +341,7 @@ MODULE_DEVICE_TABLE(of, ektf2127_of_match); 


static const struct i2c_device_id ektf2127_i2c_id[] = {

	{ "ektf2127", 0 },

	{ "ektf2132", 0 },

	{}

};

MODULE_DEVICE_TABLE(i2c, ektf2127_i2c_id);
@@ -327,6 +357,6 @@ static struct i2c_driver ektf2127_driver = { 
};

module_i2c_driver(ektf2127_driver);



MODULE_DESCRIPTION("ELAN eKTF2127 I2C Touchscreen Driver");

MODULE_DESCRIPTION("ELAN eKTF2127/eKTF2132 I2C Touchscreen Driver");

MODULE_AUTHOR("Michel Verlaan, Siebren Vroegindeweij");

MODULE_LICENSE("GPL");