Reference manual states that MxMR[MAD] increment is the indication of write to UPM array is complete. Honour that. Also, make the dummy write explicit.
Signed-off-by: Selvamuthukumar selva.muthukumar@e-coninfotech.com --- cpu/mpc83xx/cpu.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c index be47a20..ab0a374 100644 --- a/cpu/mpc83xx/cpu.c +++ b/cpu/mpc83xx/cpu.c @@ -174,7 +174,8 @@ void upmconfig (uint upm, uint *table, uint size) for (i = 0; i < size; i++) { lbus->mdr = table[i]; __asm__ __volatile__ ("sync"); - *dummy; /* Write the value to memory and increment MAD */ + *dummy = 0; /* Write the value to memory and increment MAD */ + while(((*mxmr & 0x3f) != ((i + 1) & 0x3f))); __asm__ __volatile__ ("sync"); }