From: Johan Hovold <johan@kernel.org>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Alejandro Enrique <alejandroe1@geotab.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] dt-bindings: gnss: u-blox: use open-drain reset and safeboot in example
Date: Thu, 20 Nov 2025 16:54:52 +0100 [thread overview]
Message-ID: <aR85zGurgup1w28b@hovoldconsulting.com> (raw)
In-Reply-To: <20251114155413.11949-1-johan@kernel.org>
On Fri, Nov 14, 2025 at 04:54:13PM +0100, Johan Hovold wrote:
> The RESET_N and SAFEBOOT_N pins should typically be left open and only
> be connected to ground in rare cases where a device is misbehaving.
>
> Specify GPIO_OPEN_DRAIN in the example as this is what should generally
> be used.
>
> Note that the current Linux driver implementation depends on these pins
> being declared open-drain so that they are not driven while the main
> supply is off.
This statement is too strong as there would typically be a level shifter
preventing the signals from being driven so I dropped this paragraph.
> Signed-off-by: Johan Hovold <johan@kernel.org>
Johan
prev parent reply other threads:[~2025-11-20 15:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-14 15:54 Johan Hovold
2025-11-17 19:15 ` Conor Dooley
2025-11-20 15:54 ` Johan Hovold [this message]
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