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Input: ili210x - add ili2120 support

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This adds support for the Ilitek ili2120 touchscreen found in the
Fairphone 2 smartphone.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20200209151904.661210-1-luca@z3ntu.xyz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Luca Weiss 2020-02-09 14:43:30 -08:00 committed by Dmitry Torokhov
parent fbd1ec0002
commit d0c5e7d4f5
2 changed files with 34 additions and 1 deletions
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3
Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt
View File

@ -1,9 +1,10 @@
Ilitek ILI210x/ILI2117/ILI251x touchscreen controller Ilitek ILI210x/ILI2117/ILI2120/ILI251x touchscreen controller
Required properties: Required properties:
- compatible: - compatible:
ilitek,ili210x for ILI210x ilitek,ili210x for ILI210x
ilitek,ili2117 for ILI2117 ilitek,ili2117 for ILI2117
ilitek,ili2120 for ILI2120
ilitek,ili251x for ILI251x ilitek,ili251x for ILI251x
- reg: The I2C address of the device - reg: The I2C address of the device

32
drivers/input/touchscreen/ili210x.c
View File

@ -167,6 +167,36 @@ static const struct ili2xxx_chip ili211x_chip = {
.resolution = 2048, .resolution = 2048,
}; };
static bool ili212x_touchdata_to_coords(const u8 *touchdata,
unsigned int finger,
unsigned int *x, unsigned int *y)
{
u16 val;
val = get_unaligned_be16(touchdata + 3 + (finger * 5) + 0);
if (!(val & BIT(15))) /* Touch indication */
return false;
*x = val & 0x3fff;
*y = get_unaligned_be16(touchdata + 3 + (finger * 5) + 2);
return true;
}
static bool ili212x_check_continue_polling(const u8 *data, bool touch)
{
return touch;
}
static const struct ili2xxx_chip ili212x_chip = {
.read_reg = ili210x_read_reg,
.get_touch_data = ili210x_read_touch_data,
.parse_touch_data = ili212x_touchdata_to_coords,
.continue_polling = ili212x_check_continue_polling,
.max_touches = 10,
.has_calibrate_reg = true,
};
static int ili251x_read_reg(struct i2c_client *client, static int ili251x_read_reg(struct i2c_client *client,
u8 reg, void *buf, size_t len) u8 reg, void *buf, size_t len)
{ {
@ -447,6 +477,7 @@ static int ili210x_i2c_probe(struct i2c_client *client,
static const struct i2c_device_id ili210x_i2c_id[] = { static const struct i2c_device_id ili210x_i2c_id[] = {
{ "ili210x", (long)&ili210x_chip }, { "ili210x", (long)&ili210x_chip },
{ "ili2117", (long)&ili211x_chip }, { "ili2117", (long)&ili211x_chip },
{ "ili2120", (long)&ili212x_chip },
{ "ili251x", (long)&ili251x_chip }, { "ili251x", (long)&ili251x_chip },
{ } { }
}; };
@ -455,6 +486,7 @@ MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
static const struct of_device_id ili210x_dt_ids[] = { static const struct of_device_id ili210x_dt_ids[] = {
{ .compatible = "ilitek,ili210x", .data = &ili210x_chip }, { .compatible = "ilitek,ili210x", .data = &ili210x_chip },
{ .compatible = "ilitek,ili2117", .data = &ili211x_chip }, { .compatible = "ilitek,ili2117", .data = &ili211x_chip },
{ .compatible = "ilitek,ili2120", .data = &ili212x_chip },
{ .compatible = "ilitek,ili251x", .data = &ili251x_chip }, { .compatible = "ilitek,ili251x", .data = &ili251x_chip },
{ } { }
}; };