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Fri, 25 Oct 2019 12:00:08 +0200 (CEST) Date: Fri, 25 Oct 2019 12:00:00 +0200 From: Lukasz Majewski To: Shawn Guo Subject: Re: [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's fsl_lpuart driver Message-ID: <20191025120000.5dbb837d@jawa> In-Reply-To: <20191025085515.GH3208@dragon> References: <20191010090802.16383-1-lukma@denx.de> <20191025085515.GH3208@dragon> Organization: denx.de X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191025_030014_454787_28895640 X-CRM114-Status: GOOD ( 16.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Sascha Hauer , linux-kernel@vger.kernel.org, Stefan Agner , Rob Herring , Pengutronix Kernel Team , Robin Murphy , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============1353655215343918344==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============1353655215343918344== Content-Type: multipart/signed; micalg=pgp-sha512; boundary="Sig_/By24V4SN7mPcjm/avn3Dc5F"; protocol="application/pgp-signature" --Sig_/By24V4SN7mPcjm/avn3Dc5F Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi Shawn, > On Thu, Oct 10, 2019 at 11:08:02AM +0200, Lukasz Majewski wrote: > > This change disables the DMA support (RX/TX) on the NXP's fsl_lpuart > > driver - the PIO mode is used instead. This change is necessary for > > better robustness of BK4's device use cases with many potentially > > interrupted short serial transfers. > >=20 > > Without it the driver hangs when some distortion happens on UART > > lines. > >=20 > > Signed-off-by: Lukasz Majewski > > Suggested-by: Robin Murphy =20 >=20 > Subject prefix should be 'ARM: dts: ...'. I fixed it up and applied > the patch. >=20 > Shawn Thanks :-) Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de --Sig_/By24V4SN7mPcjm/avn3Dc5F Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEgAyFJ+N6uu6+XupJAR8vZIA0zr0FAl2yx6AACgkQAR8vZIA0 zr1f0AgA09kZumpnsPlEwl87PkX6natOW7hAKLdpkClGwO/Iwc7eMgFOoVZmRoL9 U5wQZVVhjwr7CVtiwg16KpE5l5gh1+I1hc8GCb7uKByzMFGFbAKT5IIOcIQYLFpt 7WMYRGp9T+hAw3SPKoj8zqNYceFS+b/ZJ9F6PENWrQXmY9L5yMB68dEJknGGf0Hu ZYi2MIBT2JXSRcgoC+EYZA/8OllXEATMCSZxIcc1aZdcPqWfdS8fE3l2AAafle99 JcIfbjMf1RAn/aLtS73a7Dggmv8Rk+QPKj2qjrrmXnel680QVgwcMINjd0ihbq+4 vdq3ph01H/WlHpjHKKcqjHxAEn4P/w== =6lWc -----END PGP SIGNATURE----- --Sig_/By24V4SN7mPcjm/avn3Dc5F-- --===============1353655215343918344== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============1353655215343918344==--