input: touchpanel: Add DT support for Goodix touchpanel driver (1f24ee57) · Commits · e / devices / android_kernel_sony_msm8998

Documentation/devicetree/bindings/input/touchscreen/gt9xx/gt9xx.txt

0 → 100644

+79 −0

Original line number	Diff line number	Diff line
		Goodix GT9xx series touch controller

		The Goodix GT9xx series touch controller is connected to the host processor via
		I2C. The controller generates interrupts when the user touches the panel. The
		host controller is expected to read the touch coordinates over I2C and pass
		the coordinates to the rest of the system.

		Required properties:

		- compatible : Should be "goodix,gt9xx"
		- reg : I2C slave address of the device.
		- interrupt-parent : Parent of interrupt.
		- interrupts : Configuration of touch panel controller interrupt
		GPIO.
		- goodix,family-id : Family identification of the controller.
		- interrupt-gpios : Interrupt gpio which is to provide interrupts to
		host, same as "interrupts" node.
		- reset-gpios : Reset gpio to control the reset of chip.
		- goodix,display-coords : Display coordinates in pixels. It is a four
		tuple consisting of min x, min y, max x and
		max y values.

		Optional properties:

		- avdd-supply : Power supply needed to power up the device, this is
		for fixed voltage external regulator.
		- vdd-supply : Power supply needed to power up the device, when use
		external regulator, do not add this property.
		- vcc-i2c-supply : Power source required to power up i2c bus.
		GT9xx series can provide 1.8V from internal
		LDO, add this properties base on hardware
		design.
		- goodix,panel-coords : Panel coordinates for the chip in pixels.
		It is a four tuple consisting of min x,
		min y, max x and max y values.
		- goodix,i2c-pull-up : To specify pull up is required.
		- goodix,no-force-update : To specify force update is allowed.
		- goodix,button-map : Button map of key codes. The number of key codes
		depend on panel.
		- goodix,cfg-data : Touchpanel controller configuration data, ask vendor
		to provide that. Default configuration will be
		used if this property is not present.

		Example:
		i2c@f9927000 {
		goodix@5d {
		compatible = "goodix,gt9xx";
		reg = <0x5d>;
		interrupt-parent = <&msmgpio>;
		interrupts = <17 0x2008>;
		reset-gpios = <&msmgpio 16 0x00>;
		interrupt-gpios = <&msmgpio 17 0x00>;
		avdd-supply = <&tp_power>;
		goodix,panel-coords = <0 0 720 1200>;
		goodix,display-coords = <0 0 720 1080>;
		goodix,button-map= <158 102 139>;
		goodix,family-id = <0x0>;
		goodix,cfg-data = [
		41 D0 02 00 05 0A 05 01 01 08
		12 58 50 41 03 05 00 00 00 00
		00 00 00 00 00 00 00 8C 2E 0E
		28 24 73 13 00 00 00 83 03 1D
		40 02 00 00 00 03 64 32 00 00
		00 1A 38 94 C0 02 00 00 00 04
		9E 1C 00 8D 20 00 7A 26 00 6D
		2C 00 60 34 00 60 10 38 68 00
		F0 50 35 FF FF 27 00 00 00 00
		00 01 1B 14 0C 14 00 00 01 00
		00 00 00 00 00 00 00 00 00 00
		00 00 02 04 06 08 0A 0C 0E 10
		12 14 16 18 1A 1C FF FF FF FF
		FF FF FF FF FF FF FF FF FF FF
		FF FF 00 02 04 06 08 0A 0C 0F
		10 12 13 14 16 18 1C 1D 1E 1F
		20 21 22 24 26 28 29 2A FF FF
		FF FF FF FF FF FF FF 22 22 22
		22 22 22 FF 07 01];
		};
		};

Documentation/devicetree/bindings/vendor-prefixes.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -87,6 +87,7 @@ firefly Firefly
		focaltech FocalTech Systems Co.,Ltd
		fsl Freescale Semiconductor
		GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc.
		goodix Goodix. Ltd.
		gef GE Fanuc Intelligent Platforms Embedded Systems, Inc.
		geniatech Geniatech, Inc.
		giantplus Giantplus Technology Co., Ltd.

drivers/input/touchscreen/gt9xx/gt9xx.c

+166 −14

Original line number	Diff line number	Diff line
		@@ -42,6 +42,8 @@

		#include "gt9xx.h"

		#include <linux/of_gpio.h>

		#if GTP_ICS_SLOT_REPORT
		#include <linux/input/mt.h>
		#endif
		@@ -1014,6 +1016,11 @@ static int gtp_init_panel(struct goodix_ts_data *ts)
		return -EINVAL;
		}

		if (ts->pdata->gtp_cfg_len) {
		config_data = ts->pdata->config_data;
		ts->config_data = ts->pdata->config_data;
		ts->gtp_cfg_len = ts->pdata->gtp_cfg_len;
		} else {
		config_data = devm_kzalloc(&client->dev,
		GTP_CONFIG_MAX_LENGTH + GTP_ADDR_LENGTH,
		GFP_KERNEL);
		@@ -1029,6 +1036,7 @@ static int gtp_init_panel(struct goodix_ts_data *ts)
		memset(&config_data[GTP_ADDR_LENGTH], 0, GTP_CONFIG_MAX_LENGTH);
		memcpy(&config_data[GTP_ADDR_LENGTH], send_cfg_buf[sensor_id],
		ts->gtp_cfg_len);
		}

		#if GTP_CUSTOM_CFG
		config_data[RESOLUTION_LOC] =
		@@ -1345,6 +1353,120 @@ exit_free_inputdev:
		return ret;
		}

		static int goodix_ts_get_dt_coords(struct device dev, char name,
		struct goodix_ts_platform_data *pdata)
		{
		struct property *prop;
		struct device_node *np = dev->of_node;
		int rc;
		u32 coords[GOODIX_COORDS_ARR_SIZE];

		prop = of_find_property(np, name, NULL);
		if (!prop)
		return -EINVAL;
		if (!prop->value)
		return -ENODATA;

		rc = of_property_read_u32_array(np, name, coords,
		GOODIX_COORDS_ARR_SIZE);
		if (rc && (rc != -EINVAL)) {
		dev_err(dev, "Unable to read %s\n", name);
		return rc;
		}

		if (!strcmp(name, "goodix,panel-coords")) {
		pdata->panel_minx = coords[0];
		pdata->panel_miny = coords[1];
		pdata->panel_maxx = coords[2];
		pdata->panel_maxy = coords[3];
		} else if (!strcmp(name, "goodix,display-coords")) {
		pdata->x_min = coords[0];
		pdata->y_min = coords[1];
		pdata->x_max = coords[2];
		pdata->y_max = coords[3];
		} else {
		dev_err(dev, "unsupported property %s\n", name);
		return -EINVAL;
		}

		return 0;
		}

		static int goodix_parse_dt(struct device *dev,
		struct goodix_ts_platform_data *pdata)
		{
		int rc;
		struct device_node *np = dev->of_node;
		struct property *prop;
		u32 temp_val, num_buttons;
		u32 button_map[MAX_BUTTONS];

		rc = goodix_ts_get_dt_coords(dev, "goodix,panel-coords", pdata);
		if (rc && (rc != -EINVAL))
		return rc;

		rc = goodix_ts_get_dt_coords(dev, "goodix,display-coords", pdata);
		if (rc)
		return rc;

		pdata->i2c_pull_up = of_property_read_bool(np,
		"goodix,i2c-pull-up");

		pdata->no_force_update = of_property_read_bool(np,
		"goodix,no-force-update");
		/* reset, irq gpio info */
		pdata->reset_gpio = of_get_named_gpio_flags(np, "reset-gpios",
		0, &pdata->reset_gpio_flags);
		if (pdata->reset_gpio < 0)
		return pdata->reset_gpio;

		pdata->irq_gpio = of_get_named_gpio_flags(np, "interrupt-gpios",
		0, &pdata->irq_gpio_flags);
		if (pdata->irq_gpio < 0)
		return pdata->irq_gpio;

		rc = of_property_read_u32(np, "goodix,family-id", &temp_val);
		if (!rc)
		pdata->family_id = temp_val;
		else
		return rc;

		prop = of_find_property(np, "goodix,button-map", NULL);
		if (prop) {
		num_buttons = prop->length / sizeof(temp_val);
		if (num_buttons > MAX_BUTTONS)
		return -EINVAL;

		rc = of_property_read_u32_array(np,
		"goodix,button-map", button_map,
		num_buttons);
		if (rc) {
		dev_err(dev, "Unable to read key codes\n");
		return rc;
		}
		}

		prop = of_find_property(np, "goodix,cfg-data", &pdata->gtp_cfg_len);
		if (prop && prop->value) {
		pdata->config_data = devm_kzalloc(dev,
		GTP_CONFIG_MAX_LENGTH + GTP_ADDR_LENGTH, GFP_KERNEL);
		if (!pdata->config_data)
		return -ENOMEM;

		pdata->config_data[0] = GTP_REG_CONFIG_DATA >> 8;
		pdata->config_data[1] = GTP_REG_CONFIG_DATA & 0xff;
		memset(&pdata->config_data[GTP_ADDR_LENGTH], 0,
		GTP_CONFIG_MAX_LENGTH);
		memcpy(&pdata->config_data[GTP_ADDR_LENGTH],
		prop->value, pdata->gtp_cfg_len);
		} else {
		dev_err(dev,
		"Unable to get configure data, default will be used.\n");
		pdata->gtp_cfg_len = 0;
		}

		return 0;
		}
		/*******************************************************
		Function:
		I2c probe.
		@@ -1359,15 +1481,34 @@ Output:
		static int goodix_ts_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct goodix_ts_platform_data *pdata;
		struct goodix_ts_data *ts;
		u16 version_info;
		int ret;

		dev_dbg(&client->dev, "GTP I2C Address: 0x%02x\n", client->addr);
		if (client->dev.of_node) {
		pdata = devm_kzalloc(&client->dev,
		sizeof(struct goodix_ts_platform_data), GFP_KERNEL);
		if (!pdata)
		return -ENOMEM;

		ret = goodix_parse_dt(&client->dev, pdata);
		if (ret)
		return ret;
		} else {
		pdata = client->dev.platform_data;
		}

		if (!pdata) {
		dev_err(&client->dev, "GTP invalid pdata\n");
		return -EINVAL;
		}

		#if GTP_ESD_PROTECT
		i2c_connect_client = client;
		#endif

		if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "GTP I2C not supported\n");
		return -ENODEV;
		@@ -1379,7 +1520,8 @@ static int goodix_ts_probe(struct i2c_client *client,

		memset(ts, 0, sizeof(*ts));
		ts->client = client;
		/* For kernel 2.6.39 later we spin_lock_init(&ts->irq_lock)
		ts->pdata = pdata;
		/* For 2.6.39 & later use spin_lock_init(&ts->irq_lock)
		* For 2.6.39 & before, use ts->irq_lock = SPIN_LOCK_UNLOCKED
		*/
		spin_lock_init(&ts->irq_lock);
		@@ -1467,6 +1609,10 @@ exit_free_irq:
		exit_free_inputdev:
		kfree(ts->config_data);
		exit_free_io_port:
		if (gpio_is_valid(pdata->reset_gpio))
		gpio_free(pdata->reset_gpio);
		if (gpio_is_valid(pdata->irq_gpio))
		gpio_free(pdata->irq_gpio);
		exit_power_off:
		i2c_set_clientdata(client, NULL);
		kfree(ts);
		@@ -1749,6 +1895,11 @@ static const struct i2c_device_id goodix_ts_id[] = {
		{ }
		};

		static const struct of_device_id goodix_match_table[] = {
		{ .compatible = "goodix,gt9xx", },
		{ },
		};

		static struct i2c_driver goodix_ts_driver = {
		.probe = goodix_ts_probe,
		.remove = goodix_ts_remove,
		@@ -1760,6 +1911,7 @@ static struct i2c_driver goodix_ts_driver = {
		.driver = {
		.name = GTP_I2C_NAME,
		.owner = THIS_MODULE,
		.of_match_table = goodix_match_table,
		},
		};

drivers/input/touchscreen/gt9xx/gt9xx.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -43,8 +43,6 @@ struct goodix_ts_platform_data {
		u32 irq_gpio_flags;
		int reset_gpio;
		u32 reset_gpio_flags;
		int ldo_en_gpio;
		u32 ldo_en_gpio_flags;
		u32 family_id;
		u32 x_max;
		u32 y_max;
		@@ -56,6 +54,8 @@ struct goodix_ts_platform_data {
		u32 panel_maxy;
		bool no_force_update;
		bool i2c_pull_up;
		int gtp_cfg_len;
		u8 *config_data;
		};
		struct goodix_ts_data {
		spinlock_t irq_lock;