linux-kernel - [PATCH 9/9] MN10300: Fix MTD JEDEC probe so that the ASB2303 bootprom can be detected [2.6.24-rc3-mm2]

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Message-ID: <20071129225301.21536.91506.stgit@warthog.procyon.org.uk>
Date:	Thu, 29 Nov 2007 22:53:01 +0000
From:	David Howells <dhowells@...hat.com>
To:	akpm@...ux-foundation.org
Cc:	dhowells@...hat.com, linux-am33-list@...hat.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 9/9] MN10300: Fix MTD JEDEC probe so that the ASB2303 bootprom
	can be detected [2.6.24-rc3-mm2]

Fix MTD JEDEC probe so that the ASB2303 bootprom can be accessed.  This is
presumably required because the bootprom is normally write-protected and so
the normal flash probes don't work as they require the ability to write to the
flash to send it commands.

In the condition of the excluded if-statement, uaddr is 1.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 drivers/mtd/chips/jedec_probe.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
index 5074b5e..01a0550 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -1883,11 +1883,18 @@ static inline __u8 finfo_uaddr(const struct amd_flash_info *finfo, int device_ty
 
 	uaddr = finfo->uaddr[uaddr_idx];
 
+	/* the MN10300 ASB2303 board doesn't detect its bootprom if this test
+	 * is allowed to take place, presumably because the flash is
+	 * write-protected and so cannot be commanded for the purposes of
+	 * probing
+	 */
+#ifndef CONFIG_MN10300_UNIT_ASB2303
 	if (uaddr != MTD_UADDR_NOT_SUPPORTED ) {
 		/* ASSERT("The unlock addresses for non-8-bit mode
 		   are bollocks. We don't really need an array."); */
 		uaddr = finfo->uaddr[0];
 	}
+#endif
 
  uaddr_done:
 	return uaddr;

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