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pinctrl: sunxi: add of_xlate function 

Since the pin controller of sunxi chips is represented as a
single bank in the driver.

Since this is neither convenient nor represented that way in the
datasheets, define a custom of_xlate function with the layout
<bank pin flag>

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Maxime Ripard 2013-02-03 12:10:11 +01:00 committed by Linus Walleij
parent 581981be24
commit a0d72094f0
1 changed files with 20 additions and 0 deletions
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20
drivers/pinctrl/pinctrl-sunxi.c
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@ -1261,6 +1261,24 @@ static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip,
writel((value & DATA_PINS_MASK) << index, pctl->membase + reg);
}
static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec,
u32 *flags)
{
int pin, base;
base = PINS_PER_BANK * gpiospec->args[0];
pin = base + gpiospec->args[1];
if (pin > (gc->base + gc->ngpio))
return -EINVAL;
if (flags)
*flags = gpiospec->args[2];
return pin;
}
static struct gpio_chip sunxi_pinctrl_gpio_chip = {
.owner = THIS_MODULE,
.request = sunxi_pinctrl_gpio_request,
@ -1269,6 +1287,8 @@ static struct gpio_chip sunxi_pinctrl_gpio_chip = {
.direction_output = sunxi_pinctrl_gpio_direction_output,
.get = sunxi_pinctrl_gpio_get,
.set = sunxi_pinctrl_gpio_set,
.of_xlate = sunxi_pinctrl_gpio_of_xlate,
.of_gpio_n_cells = 3,
.can_sleep = 0,
};