[2/2] mtd: parsers: bcm63xx: simplify CFE detection

Commit Message

Álvaro Fernández Rojas June 8, 2020, 9:40 a.m. UTC

Instead of trying to parse CFE version string, which is customized by some
vendors, let's just check that "CFE1" was passed on argument 3.

Signed-off-by: Álvaro Fernández Rojas <[e-mail]>
Signed-off-by: Jonas Gorski <[e-mail]>
---
 drivers/mtd/parsers/bcm63xxpart.c | 28 +++-------------------------
 1 file changed, 3 insertions(+), 25 deletions(-)

Patch

diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c
index 78f90c6c18fd..06b69e905a42 100644
--- a/drivers/mtd/parsers/bcm63xxpart.c
+++ b/drivers/mtd/parsers/bcm63xxpart.c
@@ -22,6 +22,8 @@ 
 #include <linux/mtd/partitions.h>
 #include <linux/of.h>
 
+#include <asm/mach-bcm63xx/bcm63xx_board.h>
+
 #define BCM963XX_CFE_BLOCK_SIZE		SZ_64K	/* always at least 64KiB */
 
 #define BCM963XX_CFE_MAGIC_OFFSET	0x4e0
@@ -32,30 +34,6 @@ 
 #define STR_NULL_TERMINATE(x) \
 	do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
 
-static int bcm63xx_detect_cfe(struct mtd_info *master)
-{
-	char buf[9];
-	int ret;
-	size_t retlen;
-
-	ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
-		       (void *)buf);
-	buf[retlen] = 0;
-
-	if (ret)
-		return ret;
-
-	if (strncmp("cfe-v", buf, 5) == 0)
-		return 0;
-
-	/* very old CFE's do not have the cfe-v string, so check for magic */
-	ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen,
-		       (void *)buf);
-	buf[retlen] = 0;
-
-	return strncmp("CFE1CFE1", buf, 8);
-}
-
 static int bcm63xx_read_nvram(struct mtd_info *master,
 	struct bcm963xx_nvram *nvram)
 {
@@ -138,7 +116,7 @@  static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
 	struct bcm963xx_nvram *nvram = NULL;
 	int ret;
 
-	if (bcm63xx_detect_cfe(master))
+	if (!bcm63xx_is_cfe_present())
 		return -EINVAL;
 
 	nvram = vzalloc(sizeof(*nvram));