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Commit b62cfa43 authored by Shantanu Jain's avatar Shantanu Jain
Browse files

input: touchscreen: add palm gesture sleep feature 



Add palm gesture sleep feature for ITE tech touchscreen
driver. When enabled the driver sends a key code to the
user space if a palm is detected. Two optional device-tree
properties are added for this: ite,palm-detect and
ite,palm-detect-keycode.

Change-Id: I0989cb66ab5edb10769ced9d525bd4f6d7adb02b
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent fb4ee289

Documentation/devicetree/bindings/input/touchscreen/it7258_ts_i2c.txt

+8 −0
Original line number Diff line number Diff line
@@ -22,6 +22,12 @@ Optional properties: 
 - avdd-supply		: Analog power supply needed to power device

 - vdd-supply		: Power source required to pull up i2c bus

 - ite,wakeup		: boolean, use this to support touch-to-wake feature.

 - ite,palm-detect-en	: boolean, use this to send palm-detect-keycode when

			  palm is detected.



Required properties palm-detect-en feature:

 - ite,palm-detect-keycode	: The keycode that is required to be sent when

			  palm is detected by the ITE tech driver.



Example:

	i2c@f9927000 {
@@ -35,5 +41,7 @@ Example: 
			ite,reset-gpio = <&msmgpio 16 0x00>;

			ite,irq-gpio = <&msmgpio 17 0x2008>;

			ite,wakeup;

			ite,palm-detect-en;

			ite,palm-detect-keycode = <142>;

		};

	};

drivers/input/touchscreen/it7258_ts_i2c.c

+31 −0
Original line number Diff line number Diff line
@@ -149,6 +149,8 @@ struct IT7260_ts_platform_data { 
	u32 reset_gpio;

	u32 reset_gpio_flags;

	bool wakeup;

	bool palm_detect_en;

	u16 palm_detect_keycode;

};



struct IT7260_ts_data {
@@ -749,6 +751,7 @@ static irqreturn_t IT7260_ts_threaded_handler(int irq, void *devid) 
{

	struct PointData pointData;

	uint8_t devStatus;

	bool palm_detected;

	uint8_t pressure = FD_PRESSURE_NONE;

	uint16_t x, y;
@@ -788,6 +791,16 @@ static irqreturn_t IT7260_ts_threaded_handler(int irq, void *devid) 
		return IRQ_HANDLED;

	}



	palm_detected = pointData.palm & PD_PALM_FLAG_BIT;

	if (palm_detected && gl_ts->pdata->palm_detect_en) {

		input_report_key(gl_ts->input_dev,

				gl_ts->pdata->palm_detect_keycode, 1);

		input_sync(gl_ts->input_dev);

		input_report_key(gl_ts->input_dev,

				gl_ts->pdata->palm_detect_keycode, 0);

		input_sync(gl_ts->input_dev);

	}



	if ((pointData.flags & PD_FLAGS_HAVE_FINGERS) & 1)

		readFingerData(&x, &y, &pressure, pointData.fd);
@@ -865,6 +878,7 @@ static int IT7260_ts_probe(struct i2c_client *client, 
	struct IT7260_ts_platform_data *pdata;

	uint8_t rsp[2];

	int ret = -1;

	u32 temp_val;

	int rc;

	struct dentry *temp;
@@ -980,6 +994,19 @@ static int IT7260_ts_probe(struct i2c_client *client, 


	pdata->wakeup = of_property_read_bool(client->dev.of_node,

						"ite,wakeup");

	pdata->palm_detect_en = of_property_read_bool(client->dev.of_node,

						"ite,palm-detect-en");

	if (pdata->palm_detect_en) {

		rc = of_property_read_u32(client->dev.of_node,

					"ite,palm-detect-keycode", &temp_val);

		if (!rc) {

			pdata->palm_detect_keycode = temp_val;

		} else {

			dev_err(&client->dev,

				"Unable to read palm-detect-keycode\n");

			return rc;

		}

	}



	if (!chipIdentifyIT7260()) {

		LOGI("chipIdentifyIT7260 FAIL");
@@ -1018,6 +1045,10 @@ static int IT7260_ts_probe(struct i2c_client *client, 
		device_init_wakeup(&client->dev, pdata->wakeup);

	}



	if (pdata->palm_detect_en)

		set_bit(gl_ts->pdata->palm_detect_keycode,

					gl_ts->input_dev->keybit);



	if (input_register_device(input_dev)) {

		LOGE("failed to register input device\n");

		goto err_input_register;