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gpio: Adjust of_xlate API to support multiple GPIO chips

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This patch changes the of_xlate API to make it possible for multiple
gpio_chips to refer to the same device tree node.  This is useful for
banked GPIO controllers that use multiple gpio_chips for a single
device.  With this change the core code will try calling of_xlate on
each gpio_chip that references the device_node and will return the
gpio number for the first one to return 'true'.

Tested-by: Roland Stigge <stigge@antcom.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely
2012-05-17 13:54:40 -06:00
parent 09d71ff194
commit 3d0f7cf0f3
5 changed files with 43 additions and 49 deletions
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3
arch/arm/mach-imx/mach-mx35_3ds.c
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@@ -96,8 +96,7 @@ static struct i2c_board_info __initdata i2c_devices_3ds[] = {
static int lcd_power_gpio = -ENXIO;
static int mc9s08dz60_gpiochip_match(struct gpio_chip *chip,
const void *data)
static int mc9s08dz60_gpiochip_match(struct gpio_chip *chip, void *data)
{
return !strcmp(chip->label, data);
}