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nvmem: imx: scu: correct the fuse word index 

i.MX8 fuse word row index represented as one 4-bytes word.
Exp:
- MAC0 address layout in fuse:
offset 708: MAC[3] MAC[2] MAC[1] MAC[0]
offset 709: XX     xx     MAC[5] MAC[4]

The original code takes row index * 4 as the offset, this
not exactly match i.MX8 fuse map documentation.

So update code the reflect the truth.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200109104017.6249-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peng Fan 2020-01-09 10:40:15 +00:00 committed by Greg Kroah-Hartman
parent 40bb95dbb8
commit 8c4d35aff5
1 changed files with 5 additions and 5 deletions
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10
drivers/nvmem/imx-ocotp-scu.c
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@ -138,8 +138,8 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
void *p; void *p;
int i, ret; int i, ret;
index = offset >> 2; index = offset;
num_bytes = round_up((offset % 4) + bytes, 4); num_bytes = round_up(bytes, 4);
count = num_bytes >> 2; count = num_bytes >> 2;
if (count > (priv->data->nregs - index)) if (count > (priv->data->nregs - index))
@ -168,7 +168,7 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
buf++; buf++;
} }
memcpy(val, (u8 *)p + offset % 4, bytes); memcpy(val, (u8 *)p, bytes);
mutex_unlock(&scu_ocotp_mutex); mutex_unlock(&scu_ocotp_mutex);
@ -188,10 +188,10 @@ static int imx_scu_ocotp_write(void *context, unsigned int offset,
int ret; int ret;
/* allow only writing one complete OTP word at a time */ /* allow only writing one complete OTP word at a time */
if ((bytes != 4) || (offset % 4)) if (bytes != 4)
return -EINVAL; return -EINVAL;
index = offset >> 2; index = offset;
if (in_hole(context, index)) if (in_hole(context, index))
return -EINVAL; return -EINVAL;