mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
4f5f588737
This patch corrects the SPDX License Identifier style in header files related to tty serial drivers. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Link: https://lore.kernel.org/r/20200301204517.GA10368@nishad Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Helpers for controlling modem lines via GPIO
|
|
*
|
|
* Copyright (C) 2014 Paratronic S.A.
|
|
*/
|
|
|
|
#ifndef __SERIAL_MCTRL_GPIO__
|
|
#define __SERIAL_MCTRL_GPIO__
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/device.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
struct uart_port;
|
|
|
|
enum mctrl_gpio_idx {
|
|
UART_GPIO_CTS,
|
|
UART_GPIO_DSR,
|
|
UART_GPIO_DCD,
|
|
UART_GPIO_RNG,
|
|
UART_GPIO_RI = UART_GPIO_RNG,
|
|
UART_GPIO_RTS,
|
|
UART_GPIO_DTR,
|
|
UART_GPIO_MAX,
|
|
};
|
|
|
|
/*
|
|
* Opaque descriptor for modem lines controlled by GPIOs
|
|
*/
|
|
struct mctrl_gpios;
|
|
|
|
#ifdef CONFIG_GPIOLIB
|
|
|
|
/*
|
|
* Set state of the modem control output lines via GPIOs.
|
|
*/
|
|
void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl);
|
|
|
|
/*
|
|
* Get state of the modem control input lines from GPIOs.
|
|
* The mctrl flags are updated and returned.
|
|
*/
|
|
unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl);
|
|
|
|
/*
|
|
* Get state of the modem control output lines from GPIOs.
|
|
* The mctrl flags are updated and returned.
|
|
*/
|
|
unsigned int
|
|
mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl);
|
|
|
|
/*
|
|
* Returns the associated struct gpio_desc to the modem line gidx
|
|
*/
|
|
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
|
|
enum mctrl_gpio_idx gidx);
|
|
|
|
/*
|
|
* Request and set direction of modem control line GPIOs and set up irq
|
|
* handling.
|
|
* devm_* functions are used, so there's no need to call mctrl_gpio_free().
|
|
* Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
|
|
* allocation error.
|
|
*/
|
|
struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx);
|
|
|
|
/*
|
|
* Request and set direction of modem control line GPIOs.
|
|
* devm_* functions are used, so there's no need to call mctrl_gpio_free().
|
|
* Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
|
|
* allocation error.
|
|
*/
|
|
struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev,
|
|
unsigned int idx);
|
|
|
|
/*
|
|
* Free the mctrl_gpios structure.
|
|
* Normally, this function will not be called, as the GPIOs will
|
|
* be disposed of by the resource management code.
|
|
*/
|
|
void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios);
|
|
|
|
/*
|
|
* Enable gpio interrupts to report status line changes.
|
|
*/
|
|
void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios);
|
|
|
|
/*
|
|
* Disable gpio interrupts to report status line changes.
|
|
*/
|
|
void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios);
|
|
|
|
#else /* GPIOLIB */
|
|
|
|
static inline
|
|
void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)
|
|
{
|
|
return *mctrl;
|
|
}
|
|
|
|
static inline unsigned int
|
|
mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)
|
|
{
|
|
return *mctrl;
|
|
}
|
|
|
|
static inline
|
|
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
|
|
enum mctrl_gpio_idx gidx)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline
|
|
void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios)
|
|
{
|
|
}
|
|
|
|
static inline void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)
|
|
{
|
|
}
|
|
|
|
static inline void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
|
|
{
|
|
}
|
|
|
|
#endif /* GPIOLIB */
|
|
|
|
#endif
|