mcp230xx_gpio.c: Add a missing include file.

 * Fixes a warning about implicit declaration of udelay.

Signed-off-by: Philip Balister <philip@balister.org>

diff --git a/drivers/gpio/mcp230xx_gpio.c b/drivers/gpio/mcp230xx_gpio.c
index 42e7fe9d474c729880a6c05a57ad322a936abfdd..b6f533b13065b76ab65043f6e8000eee7a464787 100644 (file)
--- 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,