linux-kernel - Re: [PATCH v5 2/2] spi: add driver for J-Core SPI controller

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Message-ID: <CAL_JsqJEYtrVxZT=j97XXY2w1u1QgtpfjYSOB_H-R4y6SAb7UQ@mail.gmail.com>
Date:	Wed, 3 Aug 2016 08:16:43 -0500
From:	Rob Herring <robh+dt@...nel.org>
To:	Rich Felker <dalias@...c.org>
Cc:	"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	SH-Linux <linux-sh@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v5 2/2] spi: add driver for J-Core SPI controller

On Sun, Apr 3, 2016 at 12:12 AM, Rich Felker <dalias@...c.org> wrote:

The date on your patch emails is way off.

> The J-Core "spi2" device is a PIO-based SPI master controller. It
> differs from "bitbang" devices in that that it's clocked in hardware
> rather than via soft clock modulation over gpio, and performs
> byte-at-a-time transfers between the cpu and SPI controller.
>
> This driver will be extended to support future versions of the J-Core
> SPI controller with DMA transfers when they become available.
>
> Signed-off-by: Rich Felker <dalias@...c.org>