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authorHeiko Stübner <heiko@sntech.de>2013-02-23 12:08:55 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2013-02-24 19:10:18 -0800
commit7241443f67bb352183bcfd7e3b807b87f2777b5d (patch)
tree24643c68bf0b3dfac6825fd5df0f0bad91546f98 /drivers/input/touchscreen/auo-pixcir-ts.c
parent38e83f7f9169400047aa3033d643891da1b00441 (diff)
Input: auo_pixcir_ts - add devicetree support
Add the necessary code to create the needed platformdata from devicetree informations. The interrupt mode of the chip is not set via devicetree, as it is not a property of the hardware but instead only a preferred type of operation. This should probably be made settable via configfs in the future. The option set as default is the mode the datasheet mentions as default. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/auo-pixcir-ts.c')
-rw-r--r--drivers/input/touchscreen/auo-pixcir-ts.c74
1 files changed, 69 insertions, 5 deletions
diff --git a/drivers/input/touchscreen/auo-pixcir-ts.c b/drivers/input/touchscreen/auo-pixcir-ts.c
index c0a2483b30cb..dfa6d5463ef7 100644
--- a/drivers/input/touchscreen/auo-pixcir-ts.c
+++ b/drivers/input/touchscreen/auo-pixcir-ts.c
@@ -31,6 +31,8 @@
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/input/auo-pixcir-ts.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
/*
* Coordinate calculation:
@@ -479,19 +481,72 @@ unlock:
}
#endif
-static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, auo_pixcir_suspend,
- auo_pixcir_resume);
+static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops,
+ auo_pixcir_suspend, auo_pixcir_resume);
+
+#ifdef CONFIG_OF
+static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
+{
+ struct auo_pixcir_ts_platdata *pdata;
+ struct device_node *np = dev->of_node;
+
+ if (!np)
+ return ERR_PTR(-ENOENT);
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(dev, "failed to allocate platform data\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pdata->gpio_int = of_get_gpio(np, 0);
+ if (!gpio_is_valid(pdata->gpio_int)) {
+ dev_err(dev, "failed to get interrupt gpio\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata->gpio_rst = of_get_gpio(np, 1);
+ if (!gpio_is_valid(pdata->gpio_rst)) {
+ dev_err(dev, "failed to get reset gpio\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (of_property_read_u32(np, "x-size", &pdata->x_max)) {
+ dev_err(dev, "failed to get x-size property\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (of_property_read_u32(np, "y-size", &pdata->y_max)) {
+ dev_err(dev, "failed to get y-size property\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ /* default to asserting the interrupt when the screen is touched */
+ pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND;
+
+ return pdata;
+}
+#else
+static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
+{
+ return ERR_PTR(-EINVAL);
+}
+#endif
static int auo_pixcir_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- const struct auo_pixcir_ts_platdata *pdata = client->dev.platform_data;
+ const struct auo_pixcir_ts_platdata *pdata;
struct auo_pixcir_ts *ts;
struct input_dev *input_dev;
int ret;
- if (!pdata)
- return -EINVAL;
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata) {
+ pdata = auo_pixcir_parse_dt(&client->dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
ts = kzalloc(sizeof(struct auo_pixcir_ts), GFP_KERNEL);
if (!ts)
@@ -647,11 +702,20 @@ static const struct i2c_device_id auo_pixcir_idtable[] = {
};
MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable);
+#ifdef CONFIG_OF
+static struct of_device_id auo_pixcir_ts_dt_idtable[] = {
+ { .compatible = "auo,auo_pixcir_ts" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable);
+#endif
+
static struct i2c_driver auo_pixcir_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "auo_pixcir_ts",
.pm = &auo_pixcir_pm_ops,
+ .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable),
},
.probe = auo_pixcir_probe,
.remove = auo_pixcir_remove,