diff options
Diffstat (limited to 'drivers/input/matrix-keymap.c')
| -rw-r--r-- | drivers/input/matrix-keymap.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/input/matrix-keymap.c b/drivers/input/matrix-keymap.c index 419cb6b88e2..08b61f506db 100644 --- a/drivers/input/matrix-keymap.c +++ b/drivers/input/matrix-keymap.c @@ -24,6 +24,7 @@ #include <linux/input.h> #include <linux/of.h> #include <linux/export.h> +#include <linux/module.h> #include <linux/input/matrix_keypad.h> static bool matrix_keypad_map_key(struct input_dev *input_dev, @@ -49,6 +50,26 @@ static bool matrix_keypad_map_key(struct input_dev *input_dev, } #ifdef CONFIG_OF +int matrix_keypad_parse_of_params(struct device *dev, + unsigned int *rows, unsigned int *cols) +{ + struct device_node *np = dev->of_node; + + if (!np) { + dev_err(dev, "missing DT data"); + return -EINVAL; + } + of_property_read_u32(np, "keypad,num-rows", rows); + of_property_read_u32(np, "keypad,num-columns", cols); + if (!*rows || !*cols) { + dev_err(dev, "number of keypad rows/columns not specified\n"); + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(matrix_keypad_parse_of_params); + static int matrix_keypad_parse_of_keymap(const char *propname, unsigned int rows, unsigned int cols, struct input_dev *input_dev) @@ -182,3 +203,5 @@ int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, return 0; } EXPORT_SYMBOL(matrix_keypad_build_keymap); + +MODULE_LICENSE("GPL"); |