From 0138da6101fa3cdfea7f470d014c2f13cc03e7a9 Mon Sep 17 00:00:00 2001
From: Michael Hennerich <michael.hennerich@analog.com>
Date: Sat, 19 Jul 2008 16:56:53 +0800
Subject: Blackfin arch: fix bug - detect 0.1 silicon revision BF527-EZKIT as
0.0 version
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
include/asm-blackfin/processor.h | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
(limited to 'include')
diff --git a/include/asm-blackfin/processor.h b/include/asm-blackfin/processor.h
index 1c0040724612..6f3995b119d8 100644
--- a/include/asm-blackfin/processor.h
+++ b/include/asm-blackfin/processor.h
@@ -112,7 +112,26 @@ unsigned long get_wchan(struct task_struct *p);
static inline uint32_t __pure bfin_revid(void)
{
/* stored in the upper 4 bits */
- return bfin_read_CHIPID() >> 28;
+ uint32_t revid = bfin_read_CHIPID() >> 28;
+
+#ifdef CONFIG_BF52x
+ /* ANOMALY_05000357
+ * Incorrect Revision Number in DSPID Register
+ */
+ if (revid == 0)
+ switch (bfin_read16(_BOOTROM_GET_DXE_ADDRESS_TWI)) {
+ case 0x0010:
+ revid = 0;
+ break;
+ case 0x2796:
+ revid = 1;
+ break;
+ default:
+ revid = 0xFFFF;
+ break;
+ }
+#endif
+ return revid;
}
static inline uint32_t __pure bfin_compiled_revid(void)
--
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