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Input: pixcir_i2c_ts - add device tree support

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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>
This commit is contained in:
Roger Quadros
2014-07-28 10:05:39 -07:00
committed by Dmitry Torokhov
parent 36874c7e21
commit a4054596e9
3 changed files with 104 additions and 0 deletions
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77
drivers/input/touchscreen/pixcir_i2c_ts.c
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@@ -26,6 +26,9 @@
#include <linux/input/mt.h>
#include <linux/input/pixcir_ts.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#define PIXCIR_MAX_SLOTS 5 /* Max fingers supported by driver */
@@ -407,16 +410,69 @@ unlock:
static SIMPLE_DEV_PM_OPS(pixcir_dev_pm_ops,
pixcir_i2c_ts_suspend, pixcir_i2c_ts_resume);
#ifdef CONFIG_OF
static const struct of_device_id pixcir_of_match[];
static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
{
struct pixcir_ts_platform_data *pdata;
struct device_node *np = dev->of_node;
const struct of_device_id *match;
match = of_match_device(of_match_ptr(pixcir_of_match), dev);
if (!match)
return ERR_PTR(-EINVAL);
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->chip = *(const struct pixcir_i2c_chip_data *)match->data;
pdata->gpio_attb = of_get_named_gpio(np, "attb-gpio", 0);
/* gpio_attb validity is checked in probe */
if (of_property_read_u32(np, "touchscreen-size-x", &pdata->x_max)) {
dev_err(dev, "Failed to get touchscreen-size-x property\n");
return ERR_PTR(-EINVAL);
}
pdata->x_max -= 1;
if (of_property_read_u32(np, "touchscreen-size-y", &pdata->y_max)) {
dev_err(dev, "Failed to get touchscreen-size-y property\n");
return ERR_PTR(-EINVAL);
}
pdata->y_max -= 1;
dev_dbg(dev, "%s: x %d, y %d, gpio %d\n", __func__,
pdata->x_max + 1, pdata->y_max + 1, pdata->gpio_attb);
return pdata;
}
#else
static struct pixcir_ts_platform_data *pixcir_parse_dt(struct device *dev)
{
return ERR_PTR(-EINVAL);
}
#endif
static int pixcir_i2c_ts_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct pixcir_ts_platform_data *pdata =
dev_get_platdata(&client->dev);
struct device *dev = &client->dev;
struct device_node *np = dev->of_node;
struct pixcir_i2c_ts_data *tsdata;
struct input_dev *input;
int error;
if (np && !pdata) {
pdata = pixcir_parse_dt(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
if (!pdata) {
dev_err(&client->dev, "platform data not defined\n");
return -EINVAL;
@@ -522,15 +578,36 @@ static int pixcir_i2c_ts_remove(struct i2c_client *client)
static const struct i2c_device_id pixcir_i2c_ts_id[] = {
{ "pixcir_ts", 0 },
{ "pixcir_tangoc", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
#ifdef CONFIG_OF
static const struct pixcir_i2c_chip_data pixcir_ts_data = {
.max_fingers = 2,
/* no hw id support */
};
static const struct pixcir_i2c_chip_data pixcir_tangoc_data = {
.max_fingers = 5,
.has_hw_ids = true,
};
static const struct of_device_id pixcir_of_match[] = {
{ .compatible = "pixcir,pixcir_ts", .data = &pixcir_ts_data },
{ .compatible = "pixcir,pixcir_tangoc", .data = &pixcir_tangoc_data },
{ }
};
MODULE_DEVICE_TABLE(of, pixcir_of_match);
#endif
static struct i2c_driver pixcir_i2c_ts_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "pixcir_ts",
.pm = &pixcir_dev_pm_ops,
.of_match_table = of_match_ptr(pixcir_of_match),
},
.probe = pixcir_i2c_ts_probe,
.remove = pixcir_i2c_ts_remove,