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| 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 /Documentation/serial | |
| parent | 7d8c70d8048c7b4307dff95d9300d6b1ea7a3547 (diff) | |
| download | lwn-ce59e48fdbad2aa6609ceb87e1306ec69e577e05.tar.gz lwn-ce59e48fdbad2aa6609ceb87e1306ec69e577e05.zip | |
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 'Documentation/serial')
| -rw-r--r-- | Documentation/serial/driver | 10 |
1 files changed, 9 insertions, 1 deletions
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. |