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Input: gpio_keys - use of_property_read_u32()

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Use the of_property_read_u32() helper function to retrieve u32 values
from the device tree. Also do not pass the len parameter to
of_get_property if it isn't checked afterwards.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Tobias Klauser 2011-09-09 11:09:50 -07:00 committed by Dmitry Torokhov
parent c3a01ba9e4
commit cca84699a0
1 changed files with 13 additions and 11 deletions
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24
drivers/input/keyboard/gpio_keys.c
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@ -461,8 +461,7 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
struct device_node *node, *pp;
int i;
struct gpio_keys_button *buttons;
const u32 *reg;
int len;
u32 reg;
node = dev->of_node;
if (node == NULL)
@ -470,7 +469,7 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
memset(pdata, 0, sizeof *pdata);
pdata->rep = !!of_get_property(node, "autorepeat", &len);
pdata->rep = !!of_get_property(node, "autorepeat", NULL);
/* First count the subnodes */
pdata->nbuttons = 0;
@ -498,22 +497,25 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
buttons[i].gpio = of_get_gpio_flags(pp, 0, &flags);
buttons[i].active_low = flags & OF_GPIO_ACTIVE_LOW;
reg = of_get_property(pp, "linux,code", &len);
if (!reg) {
if (of_property_read_u32(pp, "linux,code", &reg)) {
dev_err(dev, "Button without keycode: 0x%x\n", buttons[i].gpio);
goto out_fail;
}
buttons[i].code = be32_to_cpup(reg);
buttons[i].code = reg;
buttons[i].desc = of_get_property(pp, "label", &len);
buttons[i].desc = of_get_property(pp, "label", NULL);
reg = of_get_property(pp, "linux,input-type", &len);
buttons[i].type = reg ? be32_to_cpup(reg) : EV_KEY;
if (of_property_read_u32(pp, "linux,input-type", &reg) == 0)
buttons[i].type = reg;
else
buttons[i].type = EV_KEY;
buttons[i].wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
reg = of_get_property(pp, "debounce-interval", &len);
buttons[i].debounce_interval = reg ? be32_to_cpup(reg) : 5;
if (of_property_read_u32(pp, "debounce-interval", &reg) == 0)
buttons[i].debounce_interval = reg;
else
buttons[i].debounce_interval = 5;
i++;
}