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

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.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 40bb95db

drivers/nvmem/imx-ocotp-scu.c

+5 −5
Original line number Diff line number Diff line
@@ -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;