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Blackfin: handle reboot anomaly 432

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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>
This commit is contained in:
Mike Frysinger 2008-12-06 18:06:58 -05:00
parent 7e1d212b6d
commit 3986e981f5
1 changed files with 6 additions and 0 deletions
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6
cpu/blackfin/initcode.c
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@ -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');