linux-kernel - Re: [PATCH v2 02/14] dt-bindings: iio: accel: bosch,bma220 setup SPI clock mode

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: <20250911-radiant-rigorous-magpie-eaf3f8@kuoka>
Date: Thu, 11 Sep 2025 09:31:02 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Petre Rodan <petre.rodan@...dimension.ro>
Cc: Jonathan Cameron <jic23@...nel.org>, 
	David Lechner <dlechner@...libre.com>, Nuno Sá <nuno.sa@...log.com>, 
	Andy Shevchenko <andy@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Jonathan Cameron <Jonathan.Cameron@...wei.com>, linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/14] dt-bindings: iio: accel: bosch,bma220 setup SPI
 clock mode

On Wed, Sep 10, 2025 at 10:57:07AM +0300, Petre Rodan wrote:
> Assert CPOL for a high-idle clock signal and CPHA for sampling on the
> trailing (rising) edge.
> 
> Quoting from the datasheet:
> 
>  "During the transitions on CSB, SCK must be high. SDI and SDO are driven
>  at the falling edge of SCK and should be captured at the rising edge of
>  SCK."
> 
> The sensor does not function with the default SPI clock mode.
> 
> Signed-off-by: Petre Rodan <petre.rodan@...dimension.ro>
> ---
> ChangeLog:
> - split out from a bigger patch file

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof