From mboxrd@z Thu Jan 1 00:00:00 1970 From: Atsushi Nemoto Subject: Re: [PATCH] TXx9 SPI controller driver Date: Mon, 25 Jun 2007 00:56:00 +0900 (JST) Message-ID: <20070625.005600.07644920.anemo@mba.ocn.ne.jp> References: <200706221151.24959.david-b@pacbell.net> <20070624.004159.07644824.anemo@mba.ocn.ne.jp> <200706230909.52037.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: sshtylyov-hkdhdckH98+B+jHODAdFcQ@public.gmane.org, spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, mlachwani-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org, ralf-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org To: david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org Return-path: In-Reply-To: <200706230909.52037.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org On Sat, 23 Jun 2007 09:09:51 -0700, David Brownell wrote: > > And for mmiowb() issue, I put it just only I was not sure whether > > gpio_set_value() guarantee I/O barrier. Now I see i2c-gpio.c, etc. do > > not have such barriers. I will remove these barriers and fix platform > > gpio codes. > > I don't think this is a case where there'd be a benefit to > allowing non-barriered implementations, and thus requiring > all portable code to include platform-neutral I/O barriers. > I don't know that such neutral primitives actually exist... > > I'll update the GPIO docs to make that clear, unless you > have some strong argument to the contrary. No contrary argument. Some guide to writers of GPIO implementations about the I/O barriers should be appreciated. --- Atsushi Nemoto ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/