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: <cf2ed564-bf5b-4867-b370-fdf05d8e5e50@sirena.org.uk>
Date: Wed, 19 Jun 2024 13:42:33 +0100
From: Mark Brown <broonie@...nel.org>
To: Marcelo Schmitt <marcelo.schmitt1@...il.com>
Cc: Marcelo Schmitt <marcelo.schmitt@...log.com>, lars@...afoo.de,
	Michael.Hennerich@...log.com, jic23@...nel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	nuno.sa@...log.com, dlechner@...libre.com,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/6] spi: Enable controllers to extend the SPI
 protocol with MOSI idle configuration

On Wed, Jun 19, 2024 at 09:42:23AM -0300, Marcelo Schmitt wrote:
> On 06/19, Mark Brown wrote:
> > On Tue, Jun 18, 2024 at 08:10:44PM -0300, Marcelo Schmitt wrote:

> > > First replies to v3 brought the idea of having a feature detection mechanism.
> > > I didn't really get how to do that. If feature detection is required, can
> > > somebody please provide some pointers on how to implement that?

> > Look at the checks in spi_setup() for bad_bits.  

> Yes, I added MOSI idle configuration bits to bad_bits so spi_setup() fails
> if the feature is requested but not supported:

> 	bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD |
> 				 SPI_NO_TX | SPI_NO_RX | SPI_MOSI_IDLE_LOW |
> 				 SPI_MOSI_IDLE_HIGH);

> am I still missing anything?

That should be fine.

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

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ