sh: Update sh2/sh2a timer

Renesas SH2/SH2A timer broken.
This patch fix timer function.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

diff --git a/lib_sh/time_sh2.c b/lib_sh/time_sh2.c
index fcbb921c8c71078f6d592483bbdfcb291e397e67..4f893c87bd90e311f2578e33dcd9521f3bd914b0 100644 (file)
--- a/lib_sh/time_sh2.c
+++ b/lib_sh/time_sh2.c
@@ -65,8 +65,8 @@ unsigned long long get_ticks(void)
        return cmt0_timer;
 }
 
-static vu_long cmcnt;
-ulong get_timer(ulong base)
+static vu_long cmcnt = 0;
+static unsigned long get_usec (void)
 {
        ulong data = readw(CMCNT_0);
 
@@ -81,7 +81,13 @@ ulong get_timer(ulong base)
                cmt0_timer += cmcnt;
 
        cmcnt = data;
-       return cmt0_timer - base;
+       return cmt0_timer;
+}
+
+/* return msec */
+ulong get_timer(ulong base)
+{
+       return (get_usec()/1000) - base;
 }
 
 void set_timer(ulong t)
@@ -99,9 +105,9 @@ void reset_timer(void)
 
 void udelay(unsigned long usec)
 {
-       unsigned int start = get_timer(0);
+       unsigned long end = get_usec() + usec;
 
-       while (get_timer((ulong) start) < (usec * (CONFIG_SYS_HZ / 1000000)))
+       while (get_usec() < end)
                continue;
 }