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path: root/drivers/misc/mxc_ocotp.c
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Diffstat (limited to 'drivers/misc/mxc_ocotp.c')
-rw-r--r--drivers/misc/mxc_ocotp.c23
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/misc/mxc_ocotp.c b/drivers/misc/mxc_ocotp.c
index f84fe88db1..1b945e9727 100644
--- a/drivers/misc/mxc_ocotp.c
+++ b/drivers/misc/mxc_ocotp.c
@@ -321,6 +321,11 @@ int fuse_sense(u32 bank, u32 word, u32 *val)
struct ocotp_regs *regs;
int ret;
+ if (is_imx8mq() && is_soc_rev(CHIP_REV_2_1)) {
+ printf("mxc_ocotp %s(): fuse sense is disabled\n", __func__);
+ return -EPERM;
+ }
+
ret = prepare_read(&regs, bank, word, val, __func__);
if (ret)
return ret;
@@ -354,13 +359,17 @@ static int prepare_write(struct ocotp_regs **regs, u32 bank, u32 word,
/* Only bank 0 and 1 are redundancy mode, others are ECC mode */
if (bank != 0 && bank != 1) {
- ret = fuse_sense(bank, word, &val);
- if (ret)
- return ret;
-
- if (val != 0) {
- printf("mxc_ocotp: The word has been programmed, no more write\n");
- return -EPERM;
+ if ((soc_rev() < CHIP_REV_2_0) ||
+ ((soc_rev() >= CHIP_REV_2_0) &&
+ bank != 9 && bank != 10 && bank != 28)) {
+ ret = fuse_sense(bank, word, &val);
+ if (ret)
+ return ret;
+
+ if (val != 0) {
+ printf("mxc_ocotp: The word has been programmed, no more write\n");
+ return -EPERM;
+ }
}
}
#endif