Input: pixcir_i2c_ts - add device tree support
Provide device tree support and binding information. Also provide support for a new chip "pixcir_tangoc". Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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@ -0,0 +1,26 @@
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* Pixcir I2C touchscreen controllers
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Required properties:
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- compatible: must be "pixcir,pixcir_ts" or "pixcir,pixcir_tangoc"
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- reg: I2C address of the chip
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- interrupts: interrupt to which the chip is connected
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- attb-gpio: GPIO connected to the ATTB line of the chip
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- touchscreen-size-x: horizontal resolution of touchscreen (in pixels)
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- touchscreen-size-y: vertical resolution of touchscreen (in pixels)
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Example:
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i2c@00000000 {
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/* ... */
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pixcir_ts@5c {
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compatible = "pixcir,pixcir_ts";
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reg = <0x5c>;
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interrupts = <2 0>;
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attb-gpio = <&gpf 2 0 2>;
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touchscreen-size-x = <800>;
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touchscreen-size-y = <600>;
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};
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/* ... */
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};
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@ -99,6 +99,7 @@ panasonic Panasonic Corporation
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phytec PHYTEC Messtechnik GmbH
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phytec PHYTEC Messtechnik GmbH
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picochip Picochip Ltd
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picochip Picochip Ltd
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plathome Plat'Home Co., Ltd.
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plathome Plat'Home Co., Ltd.
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pixcir PIXCIR MICROELECTRONICS Co., Ltd
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powervr PowerVR (deprecated, use img)
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powervr PowerVR (deprecated, use img)
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qca Qualcomm Atheros, Inc.
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qca Qualcomm Atheros, Inc.
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qcom Qualcomm Technologies, Inc
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qcom Qualcomm Technologies, Inc
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@ -26,6 +26,9 @@
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#include <linux/input/mt.h>
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#include <linux/input/mt.h>
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#include <linux/input/pixcir_ts.h>
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#include <linux/input/pixcir_ts.h>
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#include <linux/gpio.h>
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#include <linux/gpio.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/of_device.h>
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#define PIXCIR_MAX_SLOTS 5 /* Max fingers supported by driver */
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#define PIXCIR_MAX_SLOTS 5 /* Max fingers supported by driver */
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@ -407,16 +410,69 @@ unlock:
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static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
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static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
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pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
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pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
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#ifdef CONFIG_OF
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static const struct of_device_id pixcir_of_match[];
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static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
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{
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struct pixcir_ts_platform_data *pdata;
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struct device_node *np = dev->of_node;
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const struct of_device_id *match;
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match = of_match_device(of_match_ptr(pixcir_of_match), dev);
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if (!match)
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return ERR_PTR(-EINVAL);
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return ERR_PTR(-ENOMEM);
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pdata->chip = *(const struct pixcir_i2c_chip_data *)match->data;
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pdata->gpio_attb = of_get_named_gpio(np, "attb-gpio", 0);
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/* gpio_attb validity is checked in probe */
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if (of_property_read_u32(np, "touchscreen-size-x", &pdata->x_max)) {
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dev_err(dev, "Failed to get touchscreen-size-x property\n");
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return ERR_PTR(-EINVAL);
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}
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pdata->x_max -= 1;
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if (of_property_read_u32(np, "touchscreen-size-y", &pdata->y_max)) {
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dev_err(dev, "Failed to get touchscreen-size-y property\n");
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return ERR_PTR(-EINVAL);
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}
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pdata->y_max -= 1;
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dev_dbg(dev, "%s: x %d, y %d, gpio %d\n", __func__,
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pdata->x_max + 1, pdata->y_max + 1, pdata->gpio_attb);
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return pdata;
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}
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#else
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static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
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{
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return ERR_PTR(-EINVAL);
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}
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#endif
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static int pixcir_i2c_ts_probe(struct i2c_client *client,
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static int pixcir_i2c_ts_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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const struct i2c_device_id *id)
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{
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{
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const struct pixcir_ts_platform_data *pdata =
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const struct pixcir_ts_platform_data *pdata =
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dev_get_platdata(&client->dev);
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dev_get_platdata(&client->dev);
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struct device *dev = &client->dev;
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struct device *dev = &client->dev;
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struct device_node *np = dev->of_node;
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struct pixcir_i2c_ts_data *tsdata;
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struct pixcir_i2c_ts_data *tsdata;
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struct input_dev *input;
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struct input_dev *input;
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int error;
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int error;
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if (np && !pdata) {
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pdata = pixcir_parse_dt(dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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}
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if (!pdata) {
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if (!pdata) {
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dev_err(&client->dev, "platform data not defined\n");
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dev_err(&client->dev, "platform data not defined\n");
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return -EINVAL;
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return -EINVAL;
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@ -522,15 +578,36 @@ static int pixcir_i2c_ts_remove(struct i2c_client *client)
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static const struct i2c_device_id pixcir_i2c_ts_id[] = {
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static const struct i2c_device_id pixcir_i2c_ts_id[] = {
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{ "pixcir_ts", 0 },
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{ "pixcir_ts", 0 },
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{ "pixcir_tangoc", 0 },
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{ }
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{ }
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};
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};
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MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
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MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
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#ifdef CONFIG_OF
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static const struct pixcir_i2c_chip_data pixcir_ts_data = {
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.max_fingers = 2,
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/* no hw id support */
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};
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static const struct pixcir_i2c_chip_data pixcir_tangoc_data = {
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.max_fingers = 5,
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.has_hw_ids = true,
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};
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static const struct of_device_id pixcir_of_match[] = {
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{ .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data },
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{ .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data },
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{ }
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};
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MODULE_DEVICE_TABLE(of, pixcir_of_match);
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#endif
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static struct i2c_driver pixcir_i2c_ts_driver = {
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static struct i2c_driver pixcir_i2c_ts_driver = {
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.driver = {
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.driver = {
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.name = "pixcir_ts",
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.name = "pixcir_ts",
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.pm = &pixcir_dev_pm_ops,
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.pm = &pixcir_dev_pm_ops,
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.of_match_table = of_match_ptr(pixcir_of_match),
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},
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},
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.probe = pixcir_i2c_ts_probe,
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.probe = pixcir_i2c_ts_probe,
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.remove = pixcir_i2c_ts_remove,
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.remove = pixcir_i2c_ts_remove,
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