1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 97576ff791db..39f635812077 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1159,6 +1159,27 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip,
 
         return 0;
 }
+
+static int max310x_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+                                   unsigned long config)
+{
+        struct max310x_port *s = gpiochip_get_data(chip);
+        struct uart_port *port = &s->p[offset / 4].port;
+
+        switch (pinconf_to_config_param(config)) {
+        case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+                max310x_port_update(port, MAX310X_GPIOCFG_REG,
+                                1 << ((offset % 4) + 4),
+                                1 << ((offset % 4) + 4));
+                return 0;
+        case PIN_CONFIG_DRIVE_PUSH_PULL:
+                max310x_port_update(port, MAX310X_GPIOCFG_REG,
+                                1 << ((offset % 4) + 4), 0);
+                return 0;
+        default:
+                return -ENOTSUPP;
+        }
+}
 #endif
 
 static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
@@ -1302,6 +1323,7 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
         s->gpio.get             = max310x_gpio_get;
         s->gpio.direction_output= max310x_gpio_direction_output;
         s->gpio.set             = max310x_gpio_set;
+        s->gpio.set_config      = max310x_gpio_set_config;
         s->gpio.base            = -1;
         s->gpio.ngpio           = devtype->nr * 4;
         s->gpio.can_sleep       = 1;