linux-kernel - Re: [PATCH 1/2] net: dsa: b53: Add compatible strings for the Cygnus-family BCM11360.

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Message-ID: <ee265657-8175-b6c7-a0dc-cec216cd9ede@broadcom.com>
Date:   Mon, 24 Apr 2017 16:03:40 -0700
From:   Arun Parameswaran <arun.parameswaran@...adcom.com>
To:     Eric Anholt <eric@...olt.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>
Subject: Re: [PATCH 1/2] net: dsa: b53: Add compatible strings for the
 Cygnus-family BCM11360.

Hi Eric

A comment on the Device ID.


On 17-04-24 02:50 PM, Eric Anholt wrote:
> Cygnus is a small family of SoCs, of which we currently have
> devicetree for BCM11360 and BCM58300.  The 11360's B53 is mostly the
> same as 58xx, just requiring a tiny bit of setup that was previously
> missing.
>
> Signed-off-by: Eric Anholt <eric@...olt.net>
> ---
>  Documentation/devicetree/bindings/net/dsa/b53.txt | 3 +++
>  drivers/net/dsa/b53/b53_srab.c                    | 2 ++
>  2 files changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/dsa/b53.txt b/Documentation/devicetree/bindings/net/dsa/b53.txt
> index d6c6e41648d4..49c93d3c0839 100644
> --- a/Documentation/devicetree/bindings/net/dsa/b53.txt
> +++ b/Documentation/devicetree/bindings/net/dsa/b53.txt
> @@ -29,6 +29,9 @@ Required properties:
>        "brcm,bcm58625-srab"
>        "brcm,bcm88312-srab" and the mandatory "brcm,nsp-srab string
>  
> +  For the BCM11360 SoC, must be:
> +      "brcm,bcm11360-srab" and the mandatory "brcm,cygnus-srab string
> +
>    For the BCM63xx/33xx SoCs with an integrated switch, must be one of:
>        "brcm,bcm3384-switch"
>        "brcm,bcm6328-switch"
> diff --git a/drivers/net/dsa/b53/b53_srab.c b/drivers/net/dsa/b53/b53_srab.c
> index 8a62b6a69703..c37ffd1b6833 100644
> --- a/drivers/net/dsa/b53/b53_srab.c
> +++ b/drivers/net/dsa/b53/b53_srab.c
> @@ -364,6 +364,7 @@ static const struct of_device_id b53_srab_of_match[] = {
>  	{ .compatible = "brcm,bcm53018-srab" },
>  	{ .compatible = "brcm,bcm53019-srab" },
>  	{ .compatible = "brcm,bcm5301x-srab" },
> +	{ .compatible = "brcm,bcm11360-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ .compatible = "brcm,bcm58522-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ .compatible = "brcm,bcm58525-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ .compatible = "brcm,bcm58535-srab", .data = (void *)BCM58XX_DEVICE_ID },
> @@ -371,6 +372,7 @@ static const struct of_device_id b53_srab_of_match[] = {
>  	{ .compatible = "brcm,bcm58623-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ .compatible = "brcm,bcm58625-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ .compatible = "brcm,bcm88312-srab", .data = (void *)BCM58XX_DEVICE_ID },
> +	{ .compatible = "brcm,cygnus-srab", .data = (void *)BCM58XX_DEVICE_ID },
The device ID should be 0xd300. This is the actual value read from the switch regs.
This also requires an entry in the 'b53_switch_chips' structure in b53_common.c.
>  	{ .compatible = "brcm,nsp-srab", .data = (void *)BCM58XX_DEVICE_ID },
>  	{ /* sentinel */ },
>  };
Other wise this patch set looks good.

I was testing a similar change (except for the above, which doesn't
affect the functionality) to get the switch working and it works.

Thanks
Arun