From: Michael Hennerich <michael.hennerich@analog.com>
Date: Sat, 19 Jul 2008 08:56:53 +0000 (+0800)
Subject: Blackfin arch: fix bug - detect 0.1 silicon revision BF527-EZKIT as 0.0 version
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0138da6101fa3cdfea7f470d014c2f13cc03e7a9;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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>
---

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)