Input: atmel_mxt_ts - improve device tree parsing
Use function rather than loop, define np to reduce wrapping.
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index cf66ba1..08d9a09 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -2409,19 +2409,18 @@
static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
{
struct mxt_platform_data *pdata;
+ struct device_node *np = client->dev.of_node;
u32 *keymap;
- u32 keycode;
- int proplen, i, ret;
+ int proplen, ret;
- if (!client->dev.of_node)
+ if (!np)
return ERR_PTR(-ENOENT);
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
- if (of_find_property(client->dev.of_node, "linux,gpio-keymap",
- &proplen)) {
+ if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
pdata->t19_num_keys = proplen / sizeof(u32);
keymap = devm_kzalloc(&client->dev,
@@ -2430,14 +2429,11 @@
if (!keymap)
return ERR_PTR(-ENOMEM);
- for (i = 0; i < pdata->t19_num_keys; i++) {
- ret = of_property_read_u32_index(client->dev.of_node,
- "linux,gpio-keymap", i, &keycode);
- if (ret)
- keycode = KEY_RESERVED;
-
- keymap[i] = keycode;
- }
+ ret = of_property_read_u32_array(np, "linux,gpio-keymap",
+ keymap, pdata->t19_num_keys);
+ if (ret)
+ dev_warn(&client->dev,
+ "Couldn't read linux,gpio-keymap: %d\n", ret);
pdata->t19_keymap = keymap;
}