linux-kernel - Re: [PATCH v11 5/7] i2c: of-prober: Add GPIO support to simple helpers

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: <Zy4vUQj26-rkXrgk@skv.local>
Date: Fri, 8 Nov 2024 18:33:37 +0300
From: Andrey Skvortsov <andrej.skvortzov@...il.com>
To: Chen-Yu Tsai <wenst@...omium.org>
Cc: Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Wolfram Sang <wsa@...nel.org>, Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	Benson Leung <bleung@...omium.org>,
	Tzung-Bi Shih <tzungbi@...nel.org>, chrome-platform@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>,
	Johan Hovold <johan@...nel.org>, Jiri Kosina <jikos@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-i2c@...r.kernel.org
Subject: Re: [PATCH v11 5/7] i2c: of-prober: Add GPIO support to simple
 helpers

On 24-11-06 17:33, Chen-Yu Tsai wrote:
> Add GPIO support to the simple helpers for the I2C OF component prober.
> Components that the prober intends to probe likely require their
> regulator supplies be enabled, and GPIOs be toggled to enable them or
> bring them out of reset before they will respond to probe attempts.
> Regulator supplies were handled in the previous patch.
> 
> The assumption is that the same class of components to be probed are
> always connected in the same fashion with the same regulator supply
> and GPIO. The names may vary due to binding differences, but the
> physical layout does not change.
> 
> This supports at most one GPIO pin. The user must specify the GPIO name,
> the polarity, and the amount of time to wait after the GPIO is toggled.
> Devices with more than one GPIO pin likely require specific power
> sequencing beyond what generic code can easily support.
> 
> Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> ---
> Changes since v10:
> - Added include of linux/types.h for |bool|

Tested-by: Andrey Skvortsov <andrej.skvortzov@...il.com>

Patches 1-5 from this patchset were successfully tested with hardware
prober for i2c magnetometer on PinePhone on next-20241107. [1]

1. https://github.com/AndreySV/linux-stable/commits/in-kernel-i2c-hwprober-magnetometer/

-- 
Best regards,
Andrey Skvortsov