From: Hiroshi Ito <ito@mlb.co.jp>
To: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] MTD: jedec_probe: Fix NEC uPD29F064115 detection.
Date: Mon, 17 Aug 2009 10:24:08 +0900 (JST) [thread overview]
Message-ID: <20090817.102408.159676517.ito@mlb.co.jp> (raw)
linux v2.6.31-rc6 can not detect NEC uPD29F064115.
uPD29F064115 is a 16 bit device.
datasheet:
http://www.cn.necel.com/memory/cn/download/M16062EJ2V0DS00.pdf
A problem and fix is described as following commit, which in the main
kernel tree, uPD29F064115 needs same fix.
commit ca6f12c67ed19718cf37d0f531af9438de85b70c
Author: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Wed Jul 16 00:09:15 2008 +0900
[MTD] jedec_probe: Fix SST 16-bit chip detection
The unlock_addr rework in kernel 2.6.25 breaks 16-bit SST chips. SST
39LF160 and SST 39VF1601 are both 16-bit only chip (do not have BYTE#
pin) and new uaddr value is not correct for them. Add
MTD_UADDR_0xAAAA_0x5555 for those chips. Tested with SST 39VF1601
chip.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Hiroshi Ito <ito@mlb.co.jp>
---
drivers/mtd/chips/jedec_probe.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
index ccc4cfc..0f7065d 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -1156,8 +1156,8 @@ static const struct amd_flash_info jedec_table[] = {
.mfr_id = MANUFACTURER_NEC,
.dev_id = UPD29F064115,
.name = "NEC uPD29F064115",
- .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8,
- .uaddr = MTD_UADDR_0x0555_0x02AA, /* ???? */
+ .devtypes = CFI_DEVICETYPE_X16,
+ .uaddr = MTD_UADDR_0xAAAA_0x5555,
.dev_size = SIZE_8MiB,
.cmd_set = P_ID_AMD_STD,
.nr_regions = 3,
--
1.5.6.5
--------
Hiroshi Ito
Media Lab. Inc.,
URL http://www.mlb.co.jp ( Sorry, Japanese only. )
TEL +81-3-5294-7255 FAX +81-3-5294-7256
reply other threads:[~2009-08-17 1:33 UTC|newest]
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