diff options
| author |   Grant Likely <grant.likely@secretlab.ca> | 2013-02-12 17:48:37 +0000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-02-13 10:11:53 +0000 |
| commit | e80beb27d2f81a1c3c8887e0e0a82d77bb392d28 (patch) | |
| tree | 1f81c7ffb20b23d5f7a157e996fbb176779af88a /drivers/input/keyboard/matrix_keypad.c | |
| parent | of: Create function for counting number of phandles in a property (diff) | |
| download | linux-dev-e80beb27d2f81a1c3c8887e0e0a82d77bb392d28.tar.xz linux-dev-e80beb27d2f81a1c3c8887e0e0a82d77bb392d28.zip | |
gpio: Make of_count_named_gpios() use new of_count_phandle_with_args()
This patch replaces the horribly coded of_count_named_gpios() with a
call to of_count_phandle_with_args() which is far more efficient. This
also changes the return value of of_gpio_count() & of_gpio_named_count()
from 'unsigned int' to 'int' so that it can return an error code. All
the users of that function are fixed up to correctly handle a negative
return value.
v2: Split GPIO portion into a separate patch
Tested-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'drivers/input/keyboard/matrix_keypad.c')
| -rw-r--r-- | drivers/input/keyboard/matrix_keypad.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c index f4ff0dda7597..71d77192ac1e 100644 --- a/drivers/input/keyboard/matrix_keypad.c +++ b/drivers/input/keyboard/matrix_keypad.c @@ -403,7 +403,7 @@ matrix_keypad_parse_dt(struct device *dev) struct matrix_keypad_platform_data *pdata; struct device_node *np = dev->of_node; unsigned int *gpios; - int i; + int i, nrow, ncol; if (!np) { dev_err(dev, "device lacks DT data\n"); @@ -416,9 +416,9 @@ matrix_keypad_parse_dt(struct device *dev) return ERR_PTR(-ENOMEM); } - pdata->num_row_gpios = of_gpio_named_count(np, "row-gpios"); - pdata->num_col_gpios = of_gpio_named_count(np, "col-gpios"); - if (!pdata->num_row_gpios || !pdata->num_col_gpios) { + pdata->num_row_gpios = nrow = of_gpio_named_count(np, "row-gpios"); + pdata->num_col_gpios = ncol = of_gpio_named_count(np, "col-gpios"); + if (nrow <= 0 || ncol <= 0) { dev_err(dev, "number of keypad rows/columns not specified\n"); return ERR_PTR(-EINVAL); } |