From 22d6c8faac4e9fa43232b0cf4da427ec14d72ad3 Mon Sep 17 00:00:00 2001
From: Thomas Chou <thomas@wytron.com.tw>
Date: Thu, 1 Apr 2010 11:15:05 +0800
Subject: [PATCH] cfi_flash: reset timer in flash status check
This patch adds reset_timer() before the flash status check
waiting loop.
Since the timer is basically running asynchronous to the cfi
code, it is possible to call get_timer(0), then only a few
_SYSCLK_ cycles later an interrupt is generated. This causes
timeout even though much less time has elapsed. So the timer
period registers should be reset before get_timer(0) is
called.
There is similar usage in nand_base.c.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Stefan Roese <sr@denx.de>
---
drivers/mtd/cfi_flash.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index d0240f55d4..3267c5de36 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -544,6 +544,7 @@ static int flash_status_check (flash_info_t * info, flash_sect_t sector,
#endif
/* Wait for command completion */
+ reset_timer();
start = get_timer (0);
while (flash_is_busy (info, sector)) {
if (get_timer (start) > tout) {
@@ -630,6 +631,7 @@ static int flash_status_poll(flash_info_t *info, void *src, void *dst,
#endif
/* Wait for command completion */
+ reset_timer();
start = get_timer(0);
while (1) {
switch (info->portwidth) {
--
2.39.5