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 --- Documentation/serial/driver | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'Documentation/serial/driver') diff --git a/Documentation/serial/driver b/Documentation/serial/driver index c415b0ef4493..379468e12680 100644 --- a/Documentation/serial/driver +++ b/Documentation/serial/driver @@ -439,11 +439,13 @@ Modem control lines via GPIO Some helpers are provided in order to set/get modem control lines via GPIO. -mctrl_gpio_init(dev, idx): +mctrl_gpio_init(port, idx): This will get the {cts,rts,...}-gpios from device tree if they are present and request them, set direction etc, and return an allocated structure. devm_* functions are used, so there's no need to call mctrl_gpio_free(). + As this sets up the irq handling make sure to not handle changes to the + gpio input lines in your driver, too. mctrl_gpio_free(dev, gpios): This will free the requested gpios in mctrl_gpio_init(). @@ -458,3 +460,9 @@ mctrl_gpio_set(gpios, mctrl): mctrl_gpio_get(gpios, mctrl): This will update mctrl with the gpios values. + +mctrl_gpio_enable_ms(gpios): + Enables irqs and handling of changes to the ms lines. + +mctrl_gpio_disable_ms(gpios): + Disables irqs and handling of changes to the ms lines. -- cgit v1.2.3