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 <vap...@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 23d683a..5e48564 100644
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -272,8 +272,14 @@ 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');
--
1.6.1.2
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