serial: mctrl_gpio: add modem control read routine
mctrl_gpio_get_outputs() returns the state of following signals:
RTS, DTR
While defining the routine for reading outputs, fix the comment for
mctrl_gpio_get() routine as it returns only the state of the input
signals.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index 332a33a..fa000bc 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -48,12 +48,19 @@
void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl);
/*
- * Get state of the modem control output lines from GPIOs.
+ * Get state of the modem control input lines from GPIOs.
* The mctrl flags are updated and returned.
*/
unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl);
/*
+ * Get state of the modem control output lines from GPIOs.
+ * The mctrl flags are updated and returned.
+ */
+unsigned int
+mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl);
+
+/*
* Returns the associated struct gpio_desc to the modem line gidx
*/
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
@@ -107,6 +114,12 @@
return *mctrl;
}
+static inline unsigned int
+mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)
+{
+ return *mctrl;
+}
+
static inline
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
enum mctrl_gpio_idx gidx)
