* [PATCH] nvmem: imx: scu: correct the fuse word index
@ 2019-12-04 5:52 Peng Fan
2019-12-05 1:27 ` Andy Duan
2019-12-19 10:52 ` Srinivas Kandagatla
0 siblings, 2 replies; 3+ messages in thread
From: Peng Fan @ 2019-12-04 5:52 UTC (permalink / raw)
To: srinivas.kandagatla, shawnguo, s.hauer
Cc: kernel, festevam, dl-linux-imx, linux-arm-kernel, linux-kernel,
Aisheng Dong, Andy Duan, Peng Fan
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
^ permalink raw reply related [flat|nested] 3+ messages in thread
* RE: [PATCH] nvmem: imx: scu: correct the fuse word index
2019-12-04 5:52 [PATCH] nvmem: imx: scu: correct the fuse word index Peng Fan
@ 2019-12-05 1:27 ` Andy Duan
2019-12-19 10:52 ` Srinivas Kandagatla
1 sibling, 0 replies; 3+ messages in thread
From: Andy Duan @ 2019-12-05 1:27 UTC (permalink / raw)
To: Peng Fan, srinivas.kandagatla, shawnguo, s.hauer
Cc: kernel, festevam, dl-linux-imx, linux-arm-kernel, linux-kernel,
Aisheng Dong
From: Peng Fan <peng.fan@nxp.com> Sent: Wednesday, December 4, 2019 1:52 PM
> 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>
Reviewed-by: Fugang Duan <fugang.duan@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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] nvmem: imx: scu: correct the fuse word index
2019-12-04 5:52 [PATCH] nvmem: imx: scu: correct the fuse word index Peng Fan
2019-12-05 1:27 ` Andy Duan
@ 2019-12-19 10:52 ` Srinivas Kandagatla
1 sibling, 0 replies; 3+ messages in thread
From: Srinivas Kandagatla @ 2019-12-19 10:52 UTC (permalink / raw)
To: Peng Fan, shawnguo, s.hauer
Cc: kernel, festevam, dl-linux-imx, linux-arm-kernel, linux-kernel,
Aisheng Dong, Andy Duan
On 04/12/2019 05:52, Peng Fan wrote:
> 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(-)
>
Applied Thanks,
srini
^ permalink raw reply [flat|nested] 3+ messages in thread
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