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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: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20201106112412.390724-3-j.neuschaefer@gmx.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Jonathan Neuschäfer 2020-11-08 18:30:08 -08:00 committed by Dmitry Torokhov
parent cdab490e50
commit af5689fb5c
1 changed files with 31 additions and 1 deletions
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32
drivers/input/touchscreen/ektf2127.c
View File

@ -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");