From: Stefan Roese <sr@denx.de>
Date: Mon, 25 Oct 2010 16:31:39 +0000 (+0200)
Subject: cfi_flash: Use flash_read32() in sector_erased()
X-Git-Tag: v2011.03-rc1~55^2~14^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4d2ca9d6a0452edeaf5922cbae3b939974114214;p=kernel%2Fu-boot.git

cfi_flash: Use flash_read32() in sector_erased()

The function sector_erased() is modified to not use pointer
access, but to use the correct accessor functions. This fixes a
problem on the t3corp board with the Xilinx DS617 flash chips. Here
a board specific accessor function is needed to read from flash
in 32bit mode. This patch enables such an operation mode.

Signed-off-by: Stefan Roese <sr@denx.de>
---

diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 643cd87..7859753 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -1112,18 +1112,18 @@ static int sector_erased(flash_info_t *info, int i)
 {
 	int k;
 	int size;
-	volatile unsigned long *flash;
+	u32 *flash;
 
 	/*
 	 * Check if whole sector is erased
 	 */
 	size = flash_sector_size(info, i);
-	flash = (volatile unsigned long *) info->start[i];
+	flash = (u32 *)info->start[i];
 	/* divide by 4 for longword access */
 	size = size >> 2;
 
 	for (k = 0; k < size; k++) {
-		if (*flash++ != 0xffffffff)
+		if (flash_read32(flash++) != 0xffffffff)
 			return 0;	/* not erased */
 	}