diff options
Diffstat (limited to 'kernel/Documentation/serial/driver')
| -rw-r--r-- | kernel/Documentation/serial/driver | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/Documentation/serial/driver b/kernel/Documentation/serial/driver index c415b0ef4..379468e12 100644 --- a/kernel/Documentation/serial/driver +++ b/kernel/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. |