configuration for a certain device. See the section below named
"GPIO mode pitfalls" for more details on this scenario.
-The public pinmux API contains two functions named pinctrl_request_gpio()
-and pinctrl_free_gpio(). These two functions shall *ONLY* be called from
+The public pinmux API contains two functions named pinctrl_gpio_request()
+and pinctrl_gpio_free(). These two functions shall *ONLY* be called from
gpiolib-based drivers as part of their gpio_request() and
gpio_free() semantics. Likewise the pinctrl_gpio_direction_[input|output]
shall only be called from within respective gpio_direction_[input|output]
will be passed along to this function.
Alternatively to using these special functions, it is fully allowed to use
-named functions for each GPIO pin, the pinctrl_request_gpio() will attempt to
+named functions for each GPIO pin, the pinctrl_gpio_request() will attempt to
obtain the function "gpioN" where "N" is the global GPIO pin number if no
special GPIO-handler is registered.
For GPIOs that use pins known to the pinctrl subsystem, that subsystem should
be informed of their use; a gpiolib driver's .request() operation may call
-pinctrl_request_gpio(), and a gpiolib driver's .free() operation may call
-pinctrl_free_gpio(). The pinctrl subsystem allows a pinctrl_request_gpio()
+pinctrl_gpio_request(), and a gpiolib driver's .free() operation may call
+pinctrl_gpio_free(). The pinctrl subsystem allows a pinctrl_gpio_request()
to succeed concurrently with a pin or pingroup being "owned" by a device for
pin multiplexing.
case where e.g. a GPIO controller need to reserve a pin or set the
direction of a pin by calling any of:
-pinctrl_request_gpio()
-pinctrl_free_gpio()
+pinctrl_gpio_request()
+pinctrl_gpio_free()
pinctrl_gpio_direction_input()
pinctrl_gpio_direction_output()
that different pin ranges in a SoC is managed by different gpio drivers.
This makes it logical to let gpio drivers announce their pin ranges to
-the pin ctrl subsystem before it will call 'pinctrl_request_gpio' in order
+the pin ctrl subsystem before it will call 'pinctrl_gpio_request' in order
to request the corresponding pin to be prepared by the pinctrl subsystem
before any gpio usage.
简单地关闭未使用时钟)。
对于 GPIO 使用 pinctrl 子系统已知的引脚，子系统应该被告知其使用情况；
-一个 gpiolib 驱动的 .request()操作应调用 pinctrl_request_gpio()，
-而 gpiolib 驱动的 .free()操作应调用 pinctrl_free_gpio()。pinctrl
-子系统允许 pinctrl_request_gpio()在某个引脚或引脚组以复用形式“属于”
+一个 gpiolib 驱动的 .request()操作应调用 pinctrl_gpio_request()，
+而 gpiolib 驱动的 .free()操作应调用 pinctrl_gpio_free()。pinctrl
+子系统允许 pinctrl_gpio_request()在某个引脚或引脚组以复用形式“属于”
一个设备时都成功返回。
任何须将 GPIO 信号导向适当引脚的引脚复用硬件的编程应该发生在 GPIO
if (!have_gpio(gpiochip_get_data(chip), offset))
return -ENODEV;
- return pinctrl_request_gpio(chip->base + offset);
+ return pinctrl_gpio_request(chip->base + offset);
}
static void aspeed_gpio_free(struct gpio_chip *chip, unsigned int offset)
{
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
}
static inline void __iomem *bank_debounce_reg(struct aspeed_gpio *gpio,
static int em_gio_request(struct gpio_chip *chip, unsigned offset)
{
- return pinctrl_request_gpio(chip->base + offset);
+ return pinctrl_gpio_request(chip->base + offset);
}
static void em_gio_free(struct gpio_chip *chip, unsigned offset)
{
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
/* Set the GPIO as an input to ensure that the next GPIO request won't
* drive the GPIO pin as an output.
static int pxa_gpio_request(struct gpio_chip *chip, unsigned int offset)
{
- return pinctrl_request_gpio(chip->base + offset);
+ return pinctrl_gpio_request(chip->base + offset);
}
static void pxa_gpio_free(struct gpio_chip *chip, unsigned int offset)
{
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
}
static int pxa_init_gpio_chip(struct pxa_gpio_chip *pchip, int ngpio,
if (error < 0)
return error;
- error = pinctrl_request_gpio(chip->base + offset);
+ error = pinctrl_gpio_request(chip->base + offset);
if (error)
pm_runtime_put(&p->pdev->dev);
{
struct gpio_rcar_priv *p = gpiochip_get_data(chip);
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
/*
* Set the GPIO as an input to ensure that the next GPIO request won't
static int tegra_gpio_request(struct gpio_chip *chip, unsigned int offset)
{
- return pinctrl_request_gpio(offset);
+ return pinctrl_gpio_request(offset);
}
static void tegra_gpio_free(struct gpio_chip *chip, unsigned int offset)
{
struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
- pinctrl_free_gpio(offset);
+ pinctrl_gpio_free(offset);
tegra_gpio_disable(tgi, offset);
}
struct tz1090_gpio_bank *bank = gpiochip_get_data(chip);
int ret;
- ret = pinctrl_request_gpio(chip->base + offset);
+ ret = pinctrl_gpio_request(chip->base + offset);
if (ret)
return ret;
{
struct tz1090_gpio_bank *bank = gpiochip_get_data(chip);
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
tz1090_gpio_clear_bit(bank, REG_GPIO_BIT_EN, offset);
}
*/
int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset)
{
- return pinctrl_request_gpio(chip->gpiodev->base + offset);
+ return pinctrl_gpio_request(chip->gpiodev->base + offset);
}
EXPORT_SYMBOL_GPL(gpiochip_generic_request);
*/
void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset)
{
- pinctrl_free_gpio(chip->gpiodev->base + offset);
+ pinctrl_gpio_free(chip->gpiodev->base + offset);
}
EXPORT_SYMBOL_GPL(gpiochip_generic_free);
if (!chip->pinmux_is_supported)
return 0;
- return pinctrl_request_gpio(gpio);
+ return pinctrl_gpio_request(gpio);
}
static void iproc_gpio_free(struct gpio_chip *gc, unsigned offset)
if (!chip->pinmux_is_supported)
return;
- pinctrl_free_gpio(gpio);
+ pinctrl_gpio_free(gpio);
}
static int iproc_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
{
unsigned gpio = gc->base + offset;
- return pinctrl_request_gpio(gpio);
+ return pinctrl_gpio_request(gpio);
}
static void nsp_gpio_free(struct gpio_chip *gc, unsigned offset)
{
unsigned gpio = gc->base + offset;
- pinctrl_free_gpio(gpio);
+ pinctrl_gpio_free(gpio);
}
static int nsp_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
}
/**
- * pinctrl_request_gpio() - request a single pin to be used as GPIO
+ * pinctrl_gpio_request() - request a single pin to be used as GPIO
* @gpio: the GPIO pin number from the GPIO subsystem number space
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
* as part of their gpio_request() semantics, platforms and individual drivers
* shall *NOT* request GPIO pins to be muxed in.
*/
-int pinctrl_request_gpio(unsigned gpio)
+int pinctrl_gpio_request(unsigned gpio)
{
struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
return ret;
}
-EXPORT_SYMBOL_GPL(pinctrl_request_gpio);
+EXPORT_SYMBOL_GPL(pinctrl_gpio_request);
/**
- * pinctrl_free_gpio() - free control on a single pin, currently used as GPIO
+ * pinctrl_gpio_free() - free control on a single pin, currently used as GPIO
* @gpio: the GPIO pin number from the GPIO subsystem number space
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
* as part of their gpio_free() semantics, platforms and individual drivers
* shall *NOT* request GPIO pins to be muxed out.
*/
-void pinctrl_free_gpio(unsigned gpio)
+void pinctrl_gpio_free(unsigned gpio)
{
struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
mutex_unlock(&pctldev->mutex);
}
-EXPORT_SYMBOL_GPL(pinctrl_free_gpio);
+EXPORT_SYMBOL_GPL(pinctrl_gpio_free);
static int pinctrl_gpio_direction(unsigned gpio, bool input)
{
* or pin, and each of these will increment the @usecount.
* @mux_owner: The name of device that called pinctrl_get().
* @mux_setting: The most recent selected mux setting for this pin, if any.
- * @gpio_owner: If pinctrl_request_gpio() was called for this pin, this is
+ * @gpio_owner: If pinctrl_gpio_request() was called for this pin, this is
* the name of the GPIO that "owns" this pin.
*/
struct pin_desc {
static int meson_gpio_request(struct gpio_chip *chip, unsigned gpio)
{
- return pinctrl_request_gpio(chip->base + gpio);
+ return pinctrl_gpio_request(chip->base + gpio);
}
static void meson_gpio_free(struct gpio_chip *chip, unsigned gpio)
{
struct meson_pinctrl *pc = gpiochip_get_data(chip);
- pinctrl_free_gpio(pc->data->pin_base + gpio);
+ pinctrl_gpio_free(pc->data->pin_base + gpio);
}
static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
if (idx < 0 || pfc->info->pins[idx].enum_id == 0)
return -EINVAL;
- return pinctrl_request_gpio(offset);
+ return pinctrl_gpio_request(offset);
}
static void gpio_pin_free(struct gpio_chip *gc, unsigned offset)
{
- return pinctrl_free_gpio(offset);
+ return pinctrl_gpio_free(offset);
}
static void gpio_pin_set_value(struct sh_pfc_chip *chip, unsigned offset,
if (ret < 0)
return ret;
- if (pinctrl_request_gpio(chip->base + gpio))
+ if (pinctrl_gpio_request(chip->base + gpio))
return -ENODEV;
raw_spin_lock_irqsave(&a7gc->lock, flags);
raw_spin_unlock_irqrestore(&a7gc->lock, flags);
- pinctrl_free_gpio(chip->base + gpio);
+ pinctrl_gpio_free(chip->base + gpio);
}
static int atlas7_gpio_direction_input(struct gpio_chip *chip,
struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset);
unsigned long flags;
- if (pinctrl_request_gpio(chip->base + offset))
+ if (pinctrl_gpio_request(chip->base + offset))
return -ENODEV;
spin_lock_irqsave(&bank->lock, flags);
spin_unlock_irqrestore(&bank->lock, flags);
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
}
static int sirfsoc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
if (offset >= chip->ngpio)
return -EINVAL;
- ret = pinctrl_request_gpio(gpio);
+ ret = pinctrl_gpio_request(gpio);
if (ret)
return ret;
if (!IS_ERR(plgpio->clk))
clk_disable(plgpio->clk);
err0:
- pinctrl_free_gpio(gpio);
+ pinctrl_gpio_free(gpio);
return ret;
}
if (!IS_ERR(plgpio->clk))
clk_disable(plgpio->clk);
- pinctrl_free_gpio(gpio);
+ pinctrl_gpio_free(gpio);
}
/* PLGPIO IRQ */
return -EINVAL;
}
- return pinctrl_request_gpio(chip->base + offset);
+ return pinctrl_gpio_request(chip->base + offset);
}
static void stm32_gpio_free(struct gpio_chip *chip, unsigned offset)
{
- pinctrl_free_gpio(chip->base + offset);
+ pinctrl_gpio_free(chip->base + offset);
}
static int stm32_gpio_get(struct gpio_chip *chip, unsigned offset)
#ifdef CONFIG_PINCTRL
/* External interface to pin control */
-extern int pinctrl_request_gpio(unsigned gpio);
-extern void pinctrl_free_gpio(unsigned gpio);
+extern int pinctrl_gpio_request(unsigned gpio);
+extern void pinctrl_gpio_free(unsigned gpio);
extern int pinctrl_gpio_direction_input(unsigned gpio);
extern int pinctrl_gpio_direction_output(unsigned gpio);
extern int pinctrl_gpio_set_config(unsigned gpio, unsigned long config);
#else /* !CONFIG_PINCTRL */
-static inline int pinctrl_request_gpio(unsigned gpio)
+static inline int pinctrl_gpio_request(unsigned gpio)
{
return 0;
}
-static inline void pinctrl_free_gpio(unsigned gpio)
+static inline void pinctrl_gpio_free(unsigned gpio)
{
}
projects / users / jedix / linux-maple.git / commitdiff