linux-kernel - Re: [PATCH v3 1/9] dt-bindings: reset: Add a binding for the RPi Firmware reset controller

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200713182356.GA413630@bogus>
Date:   Mon, 13 Jul 2020 12:23:56 -0600
From:   Rob Herring <robh@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     f.fainelli@...il.com, gregkh@...uxfoundation.org, wahrenst@....net,
        p.zabel@...gutronix.de, linux-kernel@...r.kernel.org,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>, linux-usb@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, tim.gover@...pberrypi.org,
        linux-pci@...r.kernel.org, helgaas@...nel.org,
        andy.shevchenko@...il.com, mathias.nyman@...ux.intel.com,
        lorenzo.pieralisi@....com, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 1/9] dt-bindings: reset: Add a binding for the RPi
 Firmware reset controller

On Fri, Jun 12, 2020 at 07:13:25PM +0200, Nicolas Saenz Julienne wrote:
> The firmware running on the RPi VideoCore can be used to reset and
> initialize HW controlled by the firmware.
> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
> 
> ---
> Changes since v2:
>  - Add include file for reset IDs
> 
> Changes since v1:
>  - Correct cells binding as per Florian's comment
>  - Change compatible string to be more generic
> 
>  .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++++++++++++++++++
>  .../reset/raspberrypi,firmware-reset.h        | 13 ++++++++++++
>  2 files changed, 34 insertions(+)
>  create mode 100644 include/dt-bindings/reset/raspberrypi,firmware-reset.h
> 
> diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> index b48ed875eb8e..23a885af3a28 100644
> --- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> +++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> @@ -39,6 +39,22 @@ properties:
>        - compatible
>        - "#clock-cells"
>  
> +  reset:

I'm not really thrilled how this is evolving with a node per provider. 
There's no reason you can't just add #clock-cells and #reset-cells to 
the parent firmware node.

I probably should have complained with the clocks node, but that's only 
pending for 5.9.

The bigger issue is this stuff is just trickling in one bit at a time 
which gives no context for review. What's next? Is it really a mystery 
as to what functions the firmware provides? You don't have to have a 
driver in place for every function.

Rob