From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-oa0-f54.google.com ([209.85.219.54]:58733 "EHLO mail-oa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752502AbaIIT1u (ORCPT ); Tue, 9 Sep 2014 15:27:50 -0400 Received: by mail-oa0-f54.google.com with SMTP id g18so12415460oah.27 for ; Tue, 09 Sep 2014 12:27:49 -0700 (PDT) Message-ID: <540F54B1.8040409@lwfinger.net> (sfid-20140909_212754_885821_0E60B1FC) Date: Tue, 09 Sep 2014 14:27:45 -0500 From: Larry Finger MIME-Version: 1.0 To: Bastien Nocera , linux-wireless@vger.kernel.org Subject: Re: Realtek GPIO chipset, for Baytrail? References: <1410256608.4077.7.camel@hadess.net> In-Reply-To: <1410256608.4077.7.camel@hadess.net> Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 09/09/2014 04:56 AM, Bastien Nocera wrote: > Hey, > > I have a tablet that seems to be using Realtek chips to do wireless > communications (hopefully, this time I won't be wrong[1]). > > The device, under the gpio class in /sys, shows with a modalias of > "acpi:OBDA8723:" (that's on "O", not "0"). This seems to correspond to a > Realtek chipset (Larry tells me it matches the PCI ID of 0bda:8723 for > the RTL8723AE chipset). > > It shows up under: > /sys/devices/platform/80860F0A:00/subsystem/devices > > Does anyone have details on how this chipset is actually hooked up? Can > a portion of the existing RTL8723AE driver code be reused? Bastien, From the previous response, it seems unlikely that GPIO is used to control the device. That is what I expected. Working at that primitive level would be extremely difficult timing. I assume that you have checked both 'lspci' and 'lsusb' for any mention of the wireless device. I am not aware of a similar utility to scan an SDIO bus, but perhaps someone on this list will know. In addition, a full listing of 'lspci -nnv' will give a clue regarding what adapters are on the device. If the device were used with SDIO, then it would be known as the RTL8723AS. I could not find that chip, but there is an RTL8723BS with a 32-bit driver for Windows 8.1. What specific Baytrail tablet do you have? Larry