Messages in this thread Patch in this message | | | From | Peng Fan <> | Subject | [PATCH] nvmem: imx: scu: correct the fuse word index | Date | Wed, 4 Dec 2019 05:52:09 +0000 |
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From: Peng Fan <peng.fan@nxp.com>
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> --- drivers/nvmem/imx-ocotp-scu.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c index 455675dd8efe..399e1eb8b4c1 100644 --- a/drivers/nvmem/imx-ocotp-scu.c +++ b/drivers/nvmem/imx-ocotp-scu.c @@ -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; -- 2.16.4
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