ar71xx: add flush reset register writes, should fix restart issues (#17839)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 43777

diff --git a/target/linux/ar71xx/patches-3.14/728-MIPS-ath79-fix-restart.patch b/target/linux/ar71xx/patches-3.14/728-MIPS-ath79-fix-restart.patch
index 0027c596318369ef543c884c669f6dc99e5f0422..b8fc078ba00914ba5b9cf5fbf550b2220a36599f 100644 (file)
--- a/target/linux/ar71xx/patches-3.14/728-MIPS-ath79-fix-restart.patch
+++ b/target/linux/ar71xx/patches-3.14/728-MIPS-ath79-fix-restart.patch
@@ -8,3 +8,13 @@
        ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
        for (;;)
                if (cpu_wait)
+--- a/arch/mips/include/asm/mach-ath79/ath79.h
++++ b/arch/mips/include/asm/mach-ath79/ath79.h
+@@ -144,6 +144,7 @@ static inline u32 ath79_pll_rr(unsigned 
+ static inline void ath79_reset_wr(unsigned reg, u32 val)
+ {
+       __raw_writel(val, ath79_reset_base + reg);
++      (void) __raw_readl(ath79_reset_base + reg); /* flush */
+ }
+ 
+ static inline u32 ath79_reset_rr(unsigned reg)