diff --git a/drivers/soundwire/cadence_master.c
b/drivers/soundwire/cadence_master.c
index cb6a331f4..0b5bcc209 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -9,6 +9,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/io.h>
Why not add asm/io.h which is the header that actually defines
readl/writel?
The vast majority of kernel code uses linux/io.h.
We use linux/io.h for SOF as well.
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/soundwire/sdw_registers.h>
--
2.15.0
