From: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> GPIOs specified for serial port can be used either as GPIO driven MCTRL or as a wakeup-source. Use the latter property to abort the MCTRL initialization. Return -ENOSYS as this would just skip mctrl initialization in the case of wakeup source usage and not disable the port completely due to failed serial8250_register_8250_port(). Signed-off-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> --- drivers/tty/serial/serial_mctrl_gpio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index d2da6aa..dce661c 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -19,6 +19,7 @@ #include <linux/irq.h> #include <linux/gpio/consumer.h> #include <linux/termios.h> +#include <linux/property.h> #include <linux/serial_core.h> #include <linux/module.h> @@ -118,6 +119,9 @@ struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx) struct mctrl_gpios *gpios; enum mctrl_gpio_idx i; + if (device_property_present(dev, "wakeup-source")) + return ERR_PTR(-ENOSYS); + gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL); if (!gpios) return ERR_PTR(-ENOMEM); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
