From: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
Don't initialize particular GPIO pins, if they are not declared as
device property.
Signed-off-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx>
---
drivers/tty/serial/serial_mctrl_gpio.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
index d2da6aa..3bb9c09 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>
@@ -124,6 +125,11 @@ struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx)
for (i = 0; i < UART_GPIO_MAX; i++) {
enum gpiod_flags flags;
+ char mctrl_property[10];
+
+ sprintf(mctrl_property, "%s-gpios", mctrl_gpios_desc[i].name);
+ if (!device_property_present(dev, mctrl_property))
+ continue;
if (mctrl_gpios_desc[i].dir_out)
flags = GPIOD_OUT_LOW;
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
