From 3986e981f565c08f10c7e526af8cb518d741c349 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 6 Dec 2008 18:06:58 -0500
Subject: [PATCH] Blackfin: handle reboot anomaly 432
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 file changed, 6 insertions(+)
diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index 342b96ab8f1..1b58f997dd4 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');
--
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