Commit 8c4d35af authored by Peng Fan's avatar Peng Fan Committed by Greg Kroah-Hartman

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: default avatarPeng Fan <peng.fan@nxp.com>
Reviewed-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200109104017.6249-3-srinivas.kandagatla@linaro.orgSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 40bb95db
......@@ -138,8 +138,8 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
void *p;
int i, ret;
index = offset >> 2;
num_bytes = round_up((offset % 4) + bytes, 4);
index = offset;
num_bytes = round_up(bytes, 4);
count = num_bytes >> 2;
if (count > (priv->data->nregs - index))
......@@ -168,7 +168,7 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
buf++;
}
memcpy(val, (u8 *)p + offset % 4, bytes);
memcpy(val, (u8 *)p, bytes);
mutex_unlock(&scu_ocotp_mutex);
......@@ -188,10 +188,10 @@ static int imx_scu_ocotp_write(void *context, unsigned int offset,
int ret;
/* allow only writing one complete OTP word at a time */
if ((bytes != 4) || (offset % 4))
if (bytes != 4)
return -EINVAL;
index = offset >> 2;
index = offset;
if (in_hole(context, index))
return -EINVAL;
......
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