linux-kernel - Re: [PATCH v3 0/2] gpio: pcf857x: add support for reset-gpios on (most) PCA967x

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] [day] [month] [year] [list]

Message-ID: <174056564160.36055.17560042378839414084.b4-ty@linaro.org>
Date: Wed, 26 Feb 2025 11:27:25 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Quentin Schulz <foss+kernel@...il.net>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Quentin Schulz <quentin.schulz@...rry.de>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v3 0/2] gpio: pcf857x: add support for reset-gpios on (most) PCA967x

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>


On Mon, 24 Feb 2025 11:03:20 +0100, Quentin Schulz wrote:
> The PCA9670, PCA9671, PCA9672 and PCA9673 all have a RESETN input pin
> that is used to reset the I2C GPIO expander.
> 
> One needs to hold this pin low for at least 4us and the reset should be
> finished after about 100us according to the datasheet[1]. Once the reset
> is done, the "registers and I2C-bus state machine will be held in their
> default state until the RESET input is once again HIGH.".
> 
> [...]

Applied, thanks!

[1/2] dt-bindings: gpio: nxp,pcf8575: add reset GPIO
      commit: b28037d4f375ed36ce8abbbd31107b991792db72
[2/2] gpio: pcf857x: add support for reset-gpios on (most) PCA967x
      commit: 087f8a6b8ce93d582e0b84af538da13d735e2444

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>