From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 528BD1F1507; Sat, 10 May 2025 01:19:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746839987; cv=none; b=CUZwJagTYYxkZa6F5Al/9soet2zb0tdLM2wmhBgD8j0tv39bXTYaw70o6LqL14mdbEyTHQ1tKfLMnihl3QU/YSY0mBx3y/xA7W4424HtbI9FjdD/K7x2t4lp6kYNKh98jAA2ol8sVtrppWlp12T5avciWDe3f6Q/vgjdN2iJtTQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746839987; c=relaxed/simple; bh=zg5HXGTrlhhiTOPA2jjHZNaufpDMA8T3jdH8ZIjofCM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=eJ6gsFU/ItPkbjw/IvqNjmFEF5FlC5dBVsmHtWeBtNhL1ZL4CiZ0578GxpAv51XPkvHoc+7b/XYdE7nnYSWULGOHMCmarhbn8xQQmmNk5o+W2XEUesBtwlPlsCnsG7YwOGgYzRDwCtuu0YvqGYboW/4aorHuTxRbD8Rx8VF5xxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NumnG3Yk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NumnG3Yk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 679F1C4CEE4; Sat, 10 May 2025 01:19:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746839986; bh=zg5HXGTrlhhiTOPA2jjHZNaufpDMA8T3jdH8ZIjofCM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NumnG3YkxGfCRVCRqFGOxTVTNokveYQU3KGb+ew7fW3U9W8knAl9YOvv9vQAQKUcE wc0l7IkUC2x5IJzv1rXo5TzKv4GA+tUyXIT2UkFBX8NZJgUSOFFdV8liH4mdDdT1iR g2nLt+KTnipcSshGEND00NS4Z/cbqznavW3ubfAL0l9csA4lYTQbrPF+okif5Sr+n8 UUGHxSNwN3XM+EA26Odbm0Np9FDL6Fo6BwXtnSdhpv+tp+679oL8CYC2z1VLtC0FY4 hNP1k1Ij1blLOrpyGohdWcJQlscEJ8FLHKZ1k3UYsgxpSbNNf0tOr2aBamujglQqT3 B88t6ewQtaPlg== Date: Sat, 10 May 2025 10:19:44 +0900 From: Mark Brown To: James Clark Cc: Vladimir Oltean , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Chester Lin , Matthias Brugger , Ghennadi Procopciuc , NXP S32 Linux Team , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , larisa.grigore@nxp.com, arnd@linaro.org, andrei.stefanescu@nxp.com, dan.carpenter@linaro.org, linux-spi@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Bogdan-Gabriel Roman Subject: Re: [PATCH 11/14] spi: spi-fsl-dspi: Halt the module after a new message transfer Message-ID: References: <20250509-james-nxp-spi-v1-0-32bfcd2fea11@linaro.org> <20250509-james-nxp-spi-v1-11-32bfcd2fea11@linaro.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="W8tovzokLkW8kDL3" Content-Disposition: inline In-Reply-To: <20250509-james-nxp-spi-v1-11-32bfcd2fea11@linaro.org> X-Cookie: Well begun is half done. --W8tovzokLkW8kDL3 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, May 09, 2025 at 12:05:58PM +0100, James Clark wrote: > From: Bogdan-Gabriel Roman >=20 > The XSPI mode implementation in this driver still uses the EOQ flag to > signal the last word in a transmission and deassert the PCS signal. > However, at speeds lower than ~200kHZ, the PCS signal seems to remain > asserted even when SR[EOQF] =3D 1 indicates the end of a transmission. > This is a problem for target devices which require the deassertation of > the PCS signal between transfers. This also looks like it might be a fix? --W8tovzokLkW8kDL3 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmgeqa8ACgkQJNaLcl1U h9AOTQf/dvvH6zQ9y3ahPtoaRH796SUktbVlwo17kK32GIACKMksAuQXPZd+9n7b 4FxeO+I3OfdJYftlsCGwhls/p18ok4/vHQ/wFzvMlt3zMXx0IM6e4UyB9rEqnuVy YqERHCwORZvPcv3bFj7vRmkmzxGRuygjl9Wo02e7LEEztSJNelk1PVruHYUiRkih 5Tj739mOIqhPsf7zIhSnliDUDGcfEiFTJo9Hai3Jx6z3Wj6oTy4hYyq2g/G5g1pi g5EgAwO0st8dJKenYZf109W094rXshtEywMUZd1DkB2+Nf7JaPCqZUbm1IAsAX9L vLwgHrh6qCnJk1VYCOiW/qs30XD5+w== =zCVN -----END PGP SIGNATURE----- --W8tovzokLkW8kDL3--