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pinctrl: st: Use second parameter to gpio specifier

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This patch allows to use the second parameter of gpio
specifier, which is used to specify whether the gpio is
active high or low.

Simply remove specific of_xlate callback() and of_gpio_n_cells
and use default one set by of_gpiochip_add() which allows
to use second parameter gpio specifier.

Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Patrice Chotard 2016-08-10 15:12:58 +02:00 committed by Linus Walleij
parent 0f9d85b7ac
commit 1e23437563
2 changed files with 6 additions and 19 deletions
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8
Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt
View File

@ -50,7 +50,11 @@ Optional properties:
GPIO controller/bank node.
Required properties:
- gpio-controller : Indicates this device is a GPIO controller
- #gpio-cells : Should be one. The first cell is the pin number.
- #gpio-cells : Must be two.
- First cell: specifies the pin number inside the controller
- Second cell: specifies whether the pin is logically inverted.
- 0 = active high
- 1 = active low
- st,bank-name : Should be a name string for this bank as specified in
datasheet.
@ -88,7 +92,7 @@ Example:
PIO0: gpio@fe610000 {
gpio-controller;
#gpio-cells = <1>;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
reg = <0 0x100>;

17
drivers/pinctrl/pinctrl-st.c
View File

@ -799,21 +799,6 @@ static int st_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
return (direction == ST_GPIO_DIRECTION_IN);
}
static int st_gpio_xlate(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec, u32 *flags)
{
if (WARN_ON(gc->of_gpio_n_cells < 1))
return -EINVAL;
if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
return -EINVAL;
if (gpiospec->args[0] > gc->ngpio)
return -EINVAL;
return gpiospec->args[0];
}
/* Pinctrl Groups */
static int st_pctl_get_groups_count(struct pinctrl_dev *pctldev)
{
@ -1486,8 +1471,6 @@ static struct gpio_chip st_gpio_template = {
.direction_output = st_gpio_direction_output,
.get_direction = st_gpio_get_direction,
.ngpio = ST_GPIO_PINS_PER_BANK,
.of_gpio_n_cells = 1,
.of_xlate = st_gpio_xlate,
};
static struct irq_chip st_gpio_irqchip = {