From: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
mctrl_gpio_get_outputs() returns the state of following signals:
RTS, DTR
Signed-off-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
---
drivers/tty/serial/serial_mctrl_gpio.c | 18 ++++++++++++++++++
drivers/tty/serial/serial_mctrl_gpio.h | 15 ++++++++++++++-
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
index e8dd509..a868595 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.c
+++ b/drivers/tty/serial/serial_mctrl_gpio.c
@@ -86,6 +86,24 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)
}
EXPORT_SYMBOL_GPL(mctrl_gpio_get);
+unsigned int
+mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)
+{
+ enum mctrl_gpio_idx i;
+
+ for (i = 0; i < UART_GPIO_MAX; i++) {
+ if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) {
+ if (gpiod_get_value(gpios->gpio[i]))
+ *mctrl |= mctrl_gpios_desc[i].mctrl;
+ else
+ *mctrl &= ~mctrl_gpios_desc[i].mctrl;
+ }
+ }
+
+ return *mctrl;
+}
+EXPORT_SYMBOL_GPL(mctrl_gpio_get_outputs);
+
struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx)
{
struct mctrl_gpios *gpios;
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 @@ struct mctrl_gpios;
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 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)
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)
--
2.1.4
--
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