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MLK-19433-3 mxc_ocotp: Disable fuse sense for imx8mq B1 

On iMX8MQ Rev B1, reading from fuse box is not allowed. The
OCOTP_READ_FUSE_DATA register is tied to magic number 0xff0055aa
for chip rev. So u-boot has to disable the fuse sense function for it.

Signed-off-by: Ye Li <ye.li@nxp.com>
Tested-by: Anson Huang <Anson.Huang@nxp.com>
(cherry picked from commit da95f60611e8859eba3e7ccb715fdce4d6376774)
zero-sugar
Ye Li 2018-09-03 00:53:20 -07:00
parent 11a44009a6
commit 4a8a24ae8b
1 changed files with 5 additions and 0 deletions
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5
drivers/misc/mxc_ocotp.c
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@ -322,6 +322,11 @@ 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;