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From 6d34f776e8dba9cba5520db7d27a31102238f66e Mon Sep 17 00:00:00 2001
From: Andrea Adami <andrea.adami@gmail.com>
Date: Sun, 12 Oct 2014 12:31:36 +0200
Subject: [PATCH 1130/1130] mtd: cfi_cmdset_0001.c: fix resume for LH28F640BF
chips
After '#echo mem > /sys/power/state' the device can not be resumed
because apparently the Partition Configuration Register has been reset
to default. This should only happen after cold/boot or hard reset but
the behavior is confirmed on 2 different end-user devices.
Tested on zaurus collie with kernel 3.17-rc7
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
---
drivers/mtd/chips/cfi_cmdset_0001.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index a7543ba..59e2355 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -2590,6 +2590,8 @@ static void cfi_intelext_resume(struct mtd_info *mtd)
/* Go to known state. Chip may have been power cycled */
if (chip->state == FL_PM_SUSPENDED) {
+ /* Refresh LH28F640BF Partition Configuration Register */
+ fixup_LH28F640BF(mtd);
map_write(map, CMD(0xFF), cfi->chips[i].start);
chip->oldstate = chip->state = FL_READY;
wake_up(&chip->wq);
--
1.9.1
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