From ce59e48fdbad2aa6609ceb87e1306ec69e577e05 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Wed, 30 Sep 2015 10:19:41 +0200 Subject: serial: mctrl_gpio: implement interrupt handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This allows to reduce the per-driver boiler plate considerably. Signed-off-by: Uwe Kleine-König Reviewed-by: Nicolas Ferre Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_mctrl_gpio.h | 35 ++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'drivers/tty/serial/serial_mctrl_gpio.h') 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 #include +struct uart_port; + enum mctrl_gpio_idx { UART_GPIO_CTS, UART_GPIO_DSR, @@ -59,6 +61,15 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl); 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(). @@ -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 @@ -95,6 +116,12 @@ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, return ERR_PTR(-ENOSYS); } +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) { @@ -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 -- cgit v1.2.3