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]
Date:   Mon, 5 Nov 2018 10:37:56 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Faiz Abbas <faiz_abbas@...com>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, netdev@...r.kernel.org,
        linux-can@...r.kernel.org
Cc:     wg@...ndegger.com, robh+dt@...nel.org, mark.rutland@....com,
        kishon@...com
Subject: Re: [PATCH 1/6] phy: Add max_bitrate attribute &
 phy_get_max_bitrate()

On 11/05/2018 07:27 AM, Faiz Abbas wrote:
> I remove the transceiver child node binding documentation in patch 5/6.
> 
> The existing implementation is pretty limiting as it just has a child
> node with no associated device. What if a transceiver requires its own
> configurations before it can start sending/receiving messages (for
> example, my usecase requires it to pull the standby line low)?
> 
> I think that can be solved by implementing the transceiver as a phy and
> exposing a generic get_max_bitrate API. That way, the transceiver device
> can do all its startup configuration in the phy probe function.
> 
> In any case, do suggest if you have a better idea on how to implement
> pull gpio low requirement.

As long as we don't have any proper transceiver/phy driver, that does
more than swtich on/off a GPIO, please add a "xceiver" regulator to your
driver. Look for:

> devm_regulator_get(&pdev->dev, "xceiver");

in the flexcan driver.

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |



Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)

Powered by blists - more mailing lists