ramips: fix a bug in the cevt code on mt7620

Signed-off-by: John Crispin <blogic@openwrt.org>
Backport of r46038

SVN-Revision: 46039

diff --git a/target/linux/ramips/patches-3.18/999-cevt.patch b/target/linux/ramips/patches-3.18/999-cevt.patch
new file mode 100644 (file)
index 0000000..dbab467
--- /dev/null
+++ b/target/linux/ramips/patches-3.18/999-cevt.patch
@@ -0,0 +1,14 @@
+Index: linux-3.18.16/arch/mips/ralink/cevt-rt3352.c
+===================================================================
+--- linux-3.18.16.orig/arch/mips/ralink/cevt-rt3352.c  2015-06-14 09:10:18.544132719 +0200
++++ linux-3.18.16/arch/mips/ralink/cevt-rt3352.c       2015-06-18 13:30:04.830117077 +0200
+@@ -53,8 +53,7 @@
+ 
+       sdev = container_of(evt, struct systick_device, dev);
+       count = ioread32(sdev->membase + SYSTICK_COUNT);
+-      count = (count + delta) % SYSTICK_FREQ;
+-      iowrite32(count, sdev->membase + SYSTICK_COMPARE);
++      iowrite32(count + delta, sdev->membase + SYSTICK_COMPARE);
+ 
+       return 0;
+ }