Workaround anomaly 432: The bfrom_SysControl() firmware function does not clear the SIC_IWR1 register before executing the PLL programming sequence. Therefore, any interrupt enabled in the SIC_IWR1 register prior to the call to bfrom_SysControl() can prematurely terminate the idle sequence required for the PLL to relock properly. SIC_IWR0 is properly handled.
Signed-off-by: Mike Frysinger vapier@gentoo.org --- cpu/blackfin/initcode.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c index 342b96a..1b58f99 100644 --- a/cpu/blackfin/initcode.c +++ b/cpu/blackfin/initcode.c @@ -273,8 +273,14 @@ void initcode(ADI_BOOT_DATA *bootstruct) memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL; memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL; memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL; +#if ANOMALY_05000432 + bfin_write_SIC_IWR1(0); +#endif syscontrol(SYSCTRL_WRITE | SYSCTRL_VRCTL | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT | (CONFIG_VR_CTL_VAL & FREQ_MASK ? SYSCTRL_INTVOLTAGE : SYSCTRL_EXTVOLTAGE), &memory_settings, NULL); +#if ANOMALY_05000432 + bfin_write_SIC_IWR1(-1); +#endif } else { serial_putc('L');