diff --git a/drivers/i2c/i2c_shell.c b/drivers/i2c/i2c_shell.c
index 31e50f427bc..10250a75e38 100644
--- a/drivers/i2c/i2c_shell.c
+++ b/drivers/i2c/i2c_shell.c
@@ -270,6 +270,43 @@ static int cmd_i2c_read(const struct shell *shell_ctx, size_t argc, char **argv)
 	return ret;
 }
 
+/* i2c speed <device> <speed>
+ * For: speed see constants like I2C_SPEED_STANDARD
+ */
+static int cmd_i2c_speed(const struct shell *shell_ctx, size_t argc, char **argv)
+{
+	char *s_dev_name = argv[ARGV_DEV];
+	const struct device *dev;
+	uint32_t dev_config = 0;
+	uint32_t speed;
+	int ret;
+
+	dev = device_get_binding(s_dev_name);
+	if (!dev) {
+		shell_error(shell_ctx, "I2C: Device driver %s not found.",
+			    s_dev_name);
+		return -ENODEV;
+	}
+
+	speed = strtol(argv[ARGV_DEV + 1], NULL, 10);
+	ret = i2c_get_config(dev, &dev_config);
+	if (ret == 0) {
+		dev_config &= ~I2C_SPEED_MASK;
+		dev_config |= I2C_SPEED_SET(speed);
+	} else {
+		/* Can't get current config. Fallback to something reasonable */
+		dev_config = I2C_MODE_CONTROLLER | I2C_SPEED_SET(speed);
+	}
+
+	ret = i2c_configure(dev, dev_config);
+	if (ret < 0) {
+		shell_error(shell_ctx, "I2C: Failed to configure device: %s",
+			    s_dev_name);
+		return -EIO;
+	}
+	return 0;
+}
+
 static void device_name_get(size_t idx, struct shell_static_entry *entry)
 {
 	const struct device *dev = shell_device_lookup(idx, NULL);
@@ -307,6 +344,10 @@ SHELL_STATIC_SUBCMD_SET_CREATE(sub_i2c_cmds,
 		      "Write a byte to an I2C device\n"
 		      "Usage: write_byte <device> <addr> <reg> <value>",
 		      cmd_i2c_write_byte, 5, 0),
+	SHELL_CMD_ARG(speed, &dsub_device_name,
+		      "Configure I2C bus speed\n"
+		      "Usage: speed <device> <speed>",
+		      cmd_i2c_speed, 3, 0),
 	SHELL_SUBCMD_SET_END     /* Array terminated. */
 );