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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2013-03-04 20:35:24 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2013-04-05 14:58:34 +0400
commit5dc63fa2c2e149dd3e8128e54c9ca251d0558ea0 (patch)
treebd41eea01066cec5f1babbb43c7b839eafed13b6 /drivers/mtd/mtdchar.c
parent6b75152bbfce9bed30de44189d6032099c74c855 (diff)
downloadlinux-5dc63fa2c2e149dd3e8128e54c9ca251d0558ea0.tar.xz
mtd: mtdchar: handle chips that have user otp but no factory otp
Before this patch mtd_read_fact_prot_reg was used to check availability for both MTD_OTP_FACTORY and MTD_OTP_USER access. This made accessing user otp for chips that don't have a factory otp area impossible. So use the right wrapper depending on the intended area to be accessed. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/mtdchar.c')
-rw-r--r--drivers/mtd/mtdchar.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 92ab30ab00dc..c2b6729da496 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -370,28 +370,30 @@ static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
{
struct mtd_info *mtd = mfi->mtd;
size_t retlen;
- int ret = 0;
-
- /*
- * Make a fake call to mtd_read_fact_prot_reg() to check if OTP
- * operations are supported.
- */
- if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) == -EOPNOTSUPP)
- return -EOPNOTSUPP;
switch (mode) {
case MTD_OTP_FACTORY:
+ if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) ==
+ -EOPNOTSUPP)
+ return -EOPNOTSUPP;
+
mfi->mode = MTD_FILE_MODE_OTP_FACTORY;
break;
case MTD_OTP_USER:
+ if (mtd_read_user_prot_reg(mtd, -1, 0, &retlen, NULL) ==
+ -EOPNOTSUPP)
+ return -EOPNOTSUPP;
+
mfi->mode = MTD_FILE_MODE_OTP_USER;
break;
- default:
- ret = -EINVAL;
case MTD_OTP_OFF:
+ mfi->mode = MTD_FILE_MODE_NORMAL;
break;
+ default:
+ return -EINVAL;
}
- return ret;
+
+ return 0;
}
#else
# define otp_select_filemode(f,m) -EOPNOTSUPP