diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2015-09-30 10:19:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 18:47:51 +0100 |
| commit | ce59e48fdbad2aa6609ceb87e1306ec69e577e05 (patch) | |
| tree | 94bcb6b50144bda28e1934ff24021dd358636b2a /drivers/tty/serial/serial_mctrl_gpio.h | |
| parent | 7d8c70d8048c7b4307dff95d9300d6b1ea7a3547 (diff) | |
| download | linux-ce59e48fdbad2aa6609ceb87e1306ec69e577e05.tar.bz2 | |
serial: mctrl_gpio: implement interrupt handling
This allows to reduce the per-driver boiler plate considerably.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/serial_mctrl_gpio.h')
| -rw-r--r-- | drivers/tty/serial/serial_mctrl_gpio.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h index 6d046fcf744e..3c4ac9ae41f9 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.h +++ b/drivers/tty/serial/serial_mctrl_gpio.h @@ -22,6 +22,8 @@ #include <linux/device.h> #include <linux/gpio/consumer.h> +struct uart_port; + enum mctrl_gpio_idx { UART_GPIO_CTS, UART_GPIO_DSR, @@ -60,6 +62,15 @@ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, enum mctrl_gpio_idx gidx); /* + * Request and set direction of modem control lines GPIOs and sets 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 lines 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 @@ -75,6 +86,16 @@ struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, */ 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 @@ -96,6 +117,12 @@ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, } static inline +struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx) { return ERR_PTR(-ENOSYS); @@ -106,6 +133,14 @@ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios) { } +void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios) +{ +} + +void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios) +{ +} + #endif /* GPIOLIB */ #endif |