[PATCH] mcp230xx_gpio.c: Add a missing include file.

[Philip Balister]

 * Fixes a warning about implicit declaration of udelay.

Signed-off-by: Philip Balister <philip at balister.org>
---
 drivers/gpio/mcp230xx_gpio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/mcp230xx_gpio.c b/drivers/gpio/mcp230xx_gpio.c
index 42e7fe9d474..b6f533b1306 100644
--- a/drivers/gpio/mcp230xx_gpio.c
+++ b/drivers/gpio/mcp230xx_gpio.c
@@ -14,6 +14,7 @@
 #include <asm/gpio.h>
 #include <dm/device_compat.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <linux/delay.h>
 
 enum mcp230xx_type {
 	UNKNOWN = 0,
-- 
2.46.2