--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -36,6 +36,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/clk.h>
 
 #include "rt2x00.h"
 #include "rt2800lib.h"
@@ -8481,13 +8482,14 @@ static int rt2800_probe_rt(struct rt2x00
 
 int rt2800_probe_clk(struct rt2x00_dev *rt2x00dev)
 {
-	struct rt2x00_platform_data *pdata = rt2x00dev->dev->platform_data;
 	struct hw_mode_spec *spec = &rt2x00dev->spec;
+	struct clk *clk = clk_get(rt2x00dev->dev, NULL);
 
-	if (!pdata)
-		return -EINVAL;
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
 
-	spec->clk_is_20mhz = pdata->clk_is_20mhz;
+	if (clk_get_rate(clk) == 20000000)
+		spec->clk_is_20mhz = 1;
 
 	return 0;
 }