For Micron M29EW,20ms delay is needed after erase operation.
Signed-off-by: BeanHuo <b...@micron.com>
---
drivers/mtd/chips/cfi_cmdset_0002.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c
b/drivers/mtd/chips/cfi_cmdset_0002.c
index 5a4bfe3..9b0de91 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -509,6 +509,16 @@ static void cfi_fixup_m29ew_delay_after_resume(struct
cfi_private *cfi)
cfi_udelay(500);
}
+static void cfi_fixup_m29ew_delay_after_erase(struct cfi_private *cfi)
+{
+ /*
+ * Resolving the Delay After ERASE Issue @low temperature.
+ * 20ms delay is needed after erase operation.
+ */
+ if (is_m29ew(cfi))
+ cfi_udelay(20000);
+}
+
struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) {
struct cfi_private *cfi = map->fldrv_priv; @@ -2397,6 +2407,7 @@ static
int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
ret = -EIO;
}
+ cfi_fixup_m29ew_delay_after_erase(cfi);
chip->state = FL_READY;
DISABLE_VPP(map);
put_chip(map, chip, adr);
--
1.7.9.5
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