Commit d0c5e7d4 authored by Luca Weiss's avatar Luca Weiss Committed by Dmitry Torokhov
Browse files

Input: ili210x - add ili2120 support 



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

Signed-off-by: default avatarLuca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20200209151904.661210-1-luca@z3ntu.xyz


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent fbd1ec00

Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt

+2 −1
Original line number Diff line number Diff line 
Ilitek ILI210x/ILI2117/ILI251x touchscreen controller

Ilitek ILI210x/ILI2117/ILI2120/ILI251x touchscreen controller



Required properties:

- compatible:

    ilitek,ili210x for ILI210x

    ilitek,ili2117 for ILI2117

    ilitek,ili2120 for ILI2120

    ilitek,ili251x for ILI251x



- reg: The I2C address of the device

drivers/input/touchscreen/ili210x.c

+32 −0
Original line number Diff line number Diff line
@@ -167,6 +167,36 @@ static const struct ili2xxx_chip ili211x_chip = { 
	.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,

			    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[] = {

	{ "ili210x", (long)&ili210x_chip },

	{ "ili2117", (long)&ili211x_chip },

	{ "ili2120", (long)&ili212x_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[] = {

	{ .compatible = "ilitek,ili210x", .data = &ili210x_chip },

	{ .compatible = "ilitek,ili2117", .data = &ili211x_chip },

	{ .compatible = "ilitek,ili2120", .data = &ili212x_chip },

	{ .compatible = "ilitek,ili251x", .data = &ili251x_chip },

	{ }

};

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