From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [PATCH 1/4] Documentation: dt: serial: Add TX FIFO load size Date: Fri, 16 Sep 2016 14:19:08 -0500 Message-ID: <20160916191908.GA30710@rob-hp-laptop> References: <1473351141-9239-1-git-send-email-tthayer@opensource.altera.com> <1473351141-9239-2-git-send-email-tthayer@opensource.altera.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1473351141-9239-2-git-send-email-tthayer@opensource.altera.com> Sender: linux-kernel-owner@vger.kernel.org To: tthayer@opensource.altera.com Cc: gregkh@linuxfoundation.org, mark.rutland@arm.com, lftan@altera.com, jslaby@suse.com, arnd@arndb.de, peter@hurleysoftware.com, andriy.shevchenko@linux.intel.com, anton.wuerfel@fau.de, phillip.raffeck@fau.de, yegorslists@googlemail.com, matwey@sai.msu.ru, mail@maciej.szmigiero.name, peter.ujfalusi@ti.com, jonathanh@nvidia.com, dongsheng.wang@nxp.com, luis@debethencourt.com, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, tthayer.linux@gmail.com, nios2-dev@lists.rocketboards.org List-Id: linux-serial@vger.kernel.org On Thu, Sep 08, 2016 at 11:12:18AM -0500, tthayer@opensource.altera.com wrote: > From: Thor Thayer > > Add the device tree bindings needed to support the TX FIFO > load size. > > Signed-off-by: Thor Thayer > --- > Documentation/devicetree/bindings/serial/8250.txt | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/Documentation/devicetree/bindings/serial/8250.txt b/Documentation/devicetree/bindings/serial/8250.txt > index f5561ac..93de5ef 100644 > --- a/Documentation/devicetree/bindings/serial/8250.txt > +++ b/Documentation/devicetree/bindings/serial/8250.txt > @@ -45,6 +45,7 @@ Optional properties: > - {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD > line respectively. It will use specified GPIO instead of the peripheral > function pin for the UART feature. If unsure, don't specify this property. > +- tx-loadsz: the number of bytes that can be loaded into the TX FIFO. It seems you don't really need to know the loadsz, but just need the threshold trigger level. So just use that directly. And please check if any other UARTs have threshold properties. i.MX has programmable thresholds. Rob