From bc4d6f36db4b24bf328a5fd70038a2e609b9f028 Mon Sep 17 00:00:00 2001
From: Robin Getz <robin.getz@analog.com>
Date: Thu, 23 Apr 2009 14:15:04 +0000
Subject: [PATCH] Blackfin: document anomaly 05000234 workaround
Note the reason for using CHIPD over DSPID.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
arch/blackfin/include/asm/processor.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h
index 0eece23b41c7..3040415523b2 100644
--- a/arch/blackfin/include/asm/processor.h
+++ b/arch/blackfin/include/asm/processor.h
@@ -131,8 +131,8 @@ unsigned long get_wchan(struct task_struct *p);
/* Get the Silicon Revision of the chip */
static inline uint32_t __pure bfin_revid(void)
{
- /* stored in the upper 4 bits */
- uint32_t revid = bfin_read_CHIPID() >> 28;
+ /* Always use CHIPID, to work around ANOMALY_05000234 */
+ uint32_t revid = (bfin_read_CHIPID() & CHIPID_VERSION) >> 28;
#ifdef CONFIG_BF52x
/* ANOMALY_05000357
--
2.34.1