diff mbox series

[2/7] dt-bindings: can: mcan: Add ECC functionality to message ram

Message ID 20221021095833.62406-3-vivek.2311@samsung.com
State New
Headers
Series can: mcan: Add MCAN support for FSD SoC |

Commit Message

Vivek Yadav Oct. 21, 2022, 9:58 a.m. UTC 
  Whenever the data is transferred or stored on message ram, there are
inherent risks of it being lost or corruption known as single-bit errors.

ECC constantly scans data as it is processed to the message ram, using a
method known as parity checking and raise the error signals for corruption.

Add error correction code config property to enable/disable the
error correction code (ECC) functionality for Message RAM used to create
valid ECC checksums.

Signed-off-by: Chandrasekar R <rcsekar@samsung.com>
Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>
---
 Documentation/devicetree/bindings/net/can/bosch,m_can.yaml | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Marc Kleine-Budde Oct. 25, 2022, 7:24 a.m. UTC | #1 
On 21.10.2022 15:28:28, Vivek Yadav wrote:
> Whenever the data is transferred or stored on message ram, there are
> inherent risks of it being lost or corruption known as single-bit errors.
> 
> ECC constantly scans data as it is processed to the message ram, using a
> method known as parity checking and raise the error signals for corruption.
> 
> Add error correction code config property to enable/disable the
> error correction code (ECC) functionality for Message RAM used to create
> valid ECC checksums.
> 
> Signed-off-by: Chandrasekar R <rcsekar@samsung.com>
> Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>

Can you please add an example to the yaml that makes use of the
mram-ecc-cfg property?

regards,
Marc
Marc Kleine-Budde Oct. 25, 2022, 7:31 a.m. UTC | #2 
You should add the DT people on Cc:
- devicetree@vger.kernel.org
- Rob Herring <robh+dt@kernel.org>

On 21.10.2022 15:28:28, Vivek Yadav wrote:
> Whenever the data is transferred or stored on message ram, there are
> inherent risks of it being lost or corruption known as single-bit errors.
> 
> ECC constantly scans data as it is processed to the message ram, using a
> method known as parity checking and raise the error signals for corruption.
> 
> Add error correction code config property to enable/disable the
> error correction code (ECC) functionality for Message RAM used to create
> valid ECC checksums.
> 
> Signed-off-by: Chandrasekar R <rcsekar@samsung.com>
> Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>
> ---
>  Documentation/devicetree/bindings/net/can/bosch,m_can.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> index 26aa0830eea1..0ba3691863d7 100644
> --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> @@ -50,6 +50,10 @@ properties:
>        - const: hclk
>        - const: cclk
>  
> +  mram-ecc-cfg:

This probably needs a prefix and a "$ref: /schemas/types.yaml#/definitions/phandle".

> +    items:
> +      - description: M_CAN ecc registers map with configuration register offset
> +
>    bosch,mram-cfg:
>      description: |
>        Message RAM configuration data.
> -- 
> 2.17.1
> 
> 

Marc
Vivek Yadav Nov. 9, 2022, 8:47 a.m. UTC | #3 
> -----Original Message-----
> From: Marc Kleine-Budde <mkl@pengutronix.de>
> Sent: 25 October 2022 12:55
> To: Vivek Yadav <vivek.2311@samsung.com>
> Cc: rcsekar@samsung.com; wg@grandegger.com; davem@davemloft.net;
> edumazet@google.com; kuba@kernel.org; pabeni@redhat.com;
> pankaj.dubey@samsung.com; ravi.patel@samsung.com;
> alim.akhtar@samsung.com; linux-can@vger.kernel.org;
> netdev@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 2/7] dt-bindings: can: mcan: Add ECC functionality to
> message ram
> 
> On 21.10.2022 15:28:28, Vivek Yadav wrote:
> > Whenever the data is transferred or stored on message ram, there are
> > inherent risks of it being lost or corruption known as single-bit errors.
> >
> > ECC constantly scans data as it is processed to the message ram, using
> > a method known as parity checking and raise the error signals for
> corruption.
> >
> > Add error correction code config property to enable/disable the error
> > correction code (ECC) functionality for Message RAM used to create
> > valid ECC checksums.
> >
> > Signed-off-by: Chandrasekar R <rcsekar@samsung.com>
> > Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>
> 
> Can you please add an example to the yaml that makes use of the mram-ecc-
> cfg property?
> 
Okay, I will add in next patch series.
> regards,
> Marc
> 
Thanks for review.
> --
> Pengutronix e.K.                 | Marc Kleine-Budde           |
> Embedded Linux                   |
> https://protect2.fireeye.com/v1/url?k=ec0872b8-8d836798-ec09f9f7-
> 74fe485fb347-10f7a5cc45234a40&q=1&e=48595861-7733-4e80-bf96-
> bd85b4d16570&u=https%3A%2F%2Fwww.pengutronix.de%2F  |
> Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
> Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |
Vivek Yadav Nov. 9, 2022, 8:52 a.m. UTC | #4 
> -----Original Message-----
> From: Marc Kleine-Budde <mkl@pengutronix.de>
> Sent: 25 October 2022 13:02
> To: Vivek Yadav <vivek.2311@samsung.com>
> Cc: rcsekar@samsung.com; wg@grandegger.com; davem@davemloft.net;
> edumazet@google.com; kuba@kernel.org; pabeni@redhat.com;
> pankaj.dubey@samsung.com; ravi.patel@samsung.com;
> alim.akhtar@samsung.com; linux-can@vger.kernel.org;
> netdev@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 2/7] dt-bindings: can: mcan: Add ECC functionality to
> message ram
> 
> You should add the DT people on Cc:
> - devicetree@vger.kernel.org
> - Rob Herring <robh+dt@kernel.org>
> 
Okay, I will add them in the next patch series.
> On 21.10.2022 15:28:28, Vivek Yadav wrote:
> > Whenever the data is transferred or stored on message ram, there are
> > inherent risks of it being lost or corruption known as single-bit errors.
> >
> > ECC constantly scans data as it is processed to the message ram, using
> > a method known as parity checking and raise the error signals for
> corruption.
> >
> > Add error correction code config property to enable/disable the error
> > correction code (ECC) functionality for Message RAM used to create
> > valid ECC checksums.
> >
> > Signed-off-by: Chandrasekar R <rcsekar@samsung.com>
> > Signed-off-by: Vivek Yadav <vivek.2311@samsung.com>
> > ---
> >  Documentation/devicetree/bindings/net/can/bosch,m_can.yaml | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> > b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> > index 26aa0830eea1..0ba3691863d7 100644
> > --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> > +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> > @@ -50,6 +50,10 @@ properties:
> >        - const: hclk
> >        - const: cclk
> >
> > +  mram-ecc-cfg:
> 
> This probably needs a prefix and a "$ref:
> /schemas/types.yaml#/definitions/phandle".
> 
okay
I will add in the next patch series.
> > +    items:
> > +      - description: M_CAN ecc registers map with configuration
> > + register offset
> > +
> >    bosch,mram-cfg:
> >      description: |
> >        Message RAM configuration data.
> > --
> > 2.17.1
> >
> >
> 
> Marc
> 
Thanks for the review.
> --
> Pengutronix e.K.                 | Marc Kleine-Budde           |
> Embedded Linux                   |
> https://protect2.fireeye.com/v1/url?k=79b0bfe8-195222b5-79b134a7-
> 000babd9f1ba-4774190ce98312a8&q=1&e=e3b63c25-f82a-4aa4-aaee-
> 156c142ee4c6&u=https%3A%2F%2Fwww.pengutronix.de%2F  |
> Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
> Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
index 26aa0830eea1..0ba3691863d7 100644
--- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
@@ -50,6 +50,10 @@  properties:
       - const: hclk
       - const: cclk
 
+  mram-ecc-cfg:
+    items:
+      - description: M_CAN ecc registers map with configuration register offset
+
   bosch,mram-cfg:
     description: |
       Message RAM configuration data.