input: it7258_ts_i2c: add DT parsing support for touch driver
Add device tree support for ITE Tech touch controller driver. Change-Id: I2671b7c30b0f2ed1d7ad788f29b7f900a2a1cdcc Signed-off-by: Shantanu Jain <shjain@codeaurora.org> Signed-off-by: Abinaya P <abinayap@codeaurora.org>
This commit is contained in:
Abinaya P
parent
8702ef5194
commit
70dede533e
3 changed files with 144 additions and 4 deletions
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@ -0,0 +1,37 @@
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ITE Tech. touch controller
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The ITE Tech. touch controller is connected to host processor
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via i2c. The controller generates interrupts when the user
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touches the panel. The host controller is expected to read
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the touch coordinates over i2c and pass the coordinates to
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the rest of the system.
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Required properties:
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- compatible : should be "ite,it7260_ts"
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- reg : i2c slave address of the device
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- interrupt-parent : parent of interrupt
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- interrupts : touch sample interrupt to indicate presence or release
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of fingers on the panel.
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- ite,irq-gpio : irq gpio which is to provide interrupts to host,
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same as "interrupts" node. It will also
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contain active low or active high information.
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- ite,reset-gpio : reset gpio to control the reset of chip
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Optional properties:
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- avdd-supply : Analog power supply needed to power device
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- vdd-supply : Power source required to pull up i2c bus
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Example:
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i2c@f9927000 {
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it7260@46 {
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compatible = "ite,it7260_ts";
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reg = <0x46>;
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interrupt-parent = <&msmgpio>;
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interrupts = <17 0x2>;
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avdd-supply = <&pm8226_l19>;
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vdd-supply = <&pm8226_lvs1>;
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ite,reset-gpio = <&msmgpio 16 0x00>;
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ite,irq-gpio = <&msmgpio 17 0x2008>;
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};
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};
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@ -120,6 +120,7 @@ intercontrol Inter Control Group
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invensense InvenSense Inc.
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isee ISEE 2007 S.L.
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isil Intersil
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ite ITE Tech. Inc.
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jedec JEDEC Solid State Technology Association
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karo Ka-Ro electronics GmbH
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keymile Keymile GmbH
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@ -22,7 +22,8 @@
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#include <linux/firmware.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/wakelock.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of_gpio.h>
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#define MAX_BUFFER_SIZE 144
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#define DEVICE_NAME "IT7260"
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@ -128,9 +129,25 @@ struct PointData {
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#define FD_PRESSURE_HIGH 0x08
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#define FD_PRESSURE_HEAVY 0x0F
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#define IT_VTG_MIN_UV 1800000
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#define IT_VTG_MAX_UV 1800000
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#define IT_I2C_VTG_MIN_UV 2600000
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#define IT_I2C_VTG_MAX_UV 3300000
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struct IT7260_ts_platform_data {
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u32 irqflags;
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u32 irq_gpio;
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u32 irq_gpio_flags;
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u32 reset_gpio;
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u32 reset_gpio_flags;
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};
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struct IT7260_ts_data {
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struct i2c_client *client;
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struct input_dev *input_dev;
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const struct IT7260_ts_platform_data *pdata;
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struct regulator *vdd;
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struct regulator *avdd;
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};
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static int8_t fwUploadResult;
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@ -782,9 +799,10 @@ static int IT7260_ts_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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static const uint8_t cmdStart[] = {CMD_UNKNOWN_7};
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struct IT7260_i2c_platform_data *pdata;
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struct IT7260_ts_platform_data *pdata;
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uint8_t rsp[2];
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int ret = -1;
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int rc;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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LOGE("need I2C_FUNC_I2C\n");
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@ -805,13 +823,97 @@ static int IT7260_ts_probe(struct i2c_client *client,
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gl_ts->client = client;
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i2c_set_clientdata(client, gl_ts);
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pdata = client->dev.platform_data;
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if (client->dev.platform_data == NULL)
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return -ENODEV;
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if (client->dev.of_node) {
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pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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} else
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pdata = client->dev.platform_data;
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if (!pdata)
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return -ENOMEM;
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gl_ts->pdata = pdata;
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if (sysfs_create_group(&(client->dev.kobj), &it7260_attrstatus_group)) {
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dev_err(&client->dev, "failed to register sysfs #1\n");
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goto err_sysfs_grp_create_1;
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}
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gl_ts->vdd = regulator_get(&gl_ts->client->dev, "vdd");
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if (IS_ERR(gl_ts->vdd)) {
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dev_err(&gl_ts->client->dev,
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"Regulator get failed vdd\n");
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gl_ts->vdd = NULL;
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} else {
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rc = regulator_set_voltage(gl_ts->vdd,
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IT_VTG_MIN_UV, IT_VTG_MAX_UV);
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if (rc)
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dev_err(&gl_ts->client->dev,
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"Regulator set_vtg failed vdd\n");
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}
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gl_ts->avdd = regulator_get(&gl_ts->client->dev, "avdd");
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if (IS_ERR(gl_ts->avdd)) {
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dev_err(&gl_ts->client->dev,
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"Regulator get failed avdd\n");
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gl_ts->avdd = NULL;
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} else {
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rc = regulator_set_voltage(gl_ts->avdd, IT_I2C_VTG_MIN_UV,
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IT_I2C_VTG_MAX_UV);
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if (rc)
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dev_err(&gl_ts->client->dev,
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"Regulator get failed avdd\n");
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}
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if (gl_ts->vdd) {
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rc = regulator_enable(gl_ts->vdd);
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if (rc) {
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dev_err(&gl_ts->client->dev,
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"Regulator vdd enable failed rc=%d\n", rc);
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return rc;
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}
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}
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if (gl_ts->avdd) {
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rc = regulator_enable(gl_ts->avdd);
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if (rc) {
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dev_err(&gl_ts->client->dev,
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"Regulator avdd enable failed rc=%d\n", rc);
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return rc;
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}
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}
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/* reset gpio info */
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pdata->reset_gpio = of_get_named_gpio_flags(client->dev.of_node,
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"ite,reset-gpio", 0,
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&pdata->reset_gpio_flags);
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if (gpio_is_valid(pdata->reset_gpio)) {
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if (gpio_request(pdata->reset_gpio, "ite_reset_gpio"))
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dev_err(&gl_ts->client->dev,
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"gpio_request failed for reset GPIO\n");
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if (gpio_direction_output(pdata->reset_gpio, 0))
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dev_err(&gl_ts->client->dev,
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"gpio_direction_output for reset GPIO\n");
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dev_dbg(&gl_ts->client->dev, "Reset GPIO %d\n",
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pdata->reset_gpio);
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} else {
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return pdata->reset_gpio;
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}
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/* irq gpio info */
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pdata->irq_gpio = of_get_named_gpio_flags(client->dev.of_node,
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"ite,irq-gpio", 0, &pdata->irq_gpio_flags);
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if (gpio_is_valid(pdata->irq_gpio)) {
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dev_dbg(&gl_ts->client->dev, "IRQ GPIO %d, IRQ # %d\n",
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pdata->irq_gpio, gpio_to_irq(pdata->irq_gpio));
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} else {
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return pdata->irq_gpio;
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}
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if (!chipIdentifyIT7260()) {
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LOGI("chipIdentifyIT7260 FAIL");
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goto err_ident_fail_or_input_alloc;
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@ -901,7 +1003,7 @@ static const struct i2c_device_id IT7260_ts_id[] = {
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MODULE_DEVICE_TABLE(i2c, IT7260_ts_id);
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static const struct of_device_id IT7260_match_table[] = {
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{ .compatible = "ITE,IT7260_ts",},
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{ .compatible = "ite,it7260_ts",},
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{},
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};
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