MIPS: BCM47XX: Fix detected clock on Asus WL520GC and WL520GU

The Asus WL520GC and WL520GU are based on the BCM5354 and clocked at
200MHz, but they do not have a clkfreq nvram variable set to the
correct value. This adds a workaround for these devices.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5843/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/time.c b/arch/mips/bcm47xx/time.c
index 5e5d797fa90a..2c85d9254b5e 100644
--- a/arch/mips/bcm47xx/time.c
+++ b/arch/mips/bcm47xx/time.c
@@ -28,6 +28,7 @@
 #include <asm/time.h>
 #include <bcm47xx.h>
 #include <bcm47xx_nvram.h>
+#include <bcm47xx_board.h>
 
 void __init plat_time_init(void)
 {
@@ -35,6 +36,7 @@ void __init plat_time_init(void)
         u16 chip_id = 0;
         char buf[10];
         int len;
+        enum bcm47xx_board board = bcm47xx_board_get();
 
         /*
          * Use deterministic values for initial counter interrupt
@@ -64,6 +66,15 @@ void __init plat_time_init(void)
                         hz = 100000000;
         }
 
+        switch (board) {
+        case BCM47XX_BOARD_ASUS_WL520GC:
+        case BCM47XX_BOARD_ASUS_WL520GU:
+                hz = 100000000;
+                break;
+        default:
+                break;
+        }
+
         if (!hz)
                 hz = 100000000;