From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Westerberg Subject: Re: x86: Add SPI slaves to PCIe SPI master? Date: Thu, 12 Jan 2017 14:01:11 +0200 Message-ID: <20170112120111.GY2330@lahna.fi.intel.com> References: <3363354.jZif7TNsT8@ws-stein> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Alexander Stein , linux-spi To: Andy Shevchenko Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: On Thu, Jan 12, 2017 at 01:48:13PM +0200, Andy Shevchenko wrote: > On Wed, Jan 11, 2017 at 5:08 PM, Alexander Stein > wrote: > > Hi, > > > > I have a customer board using Baytrail E3805 CPU. I want to access a chip > > attached to SPI using spidev. > > First of all, this is wrong approach. Do you have a driver for the > chip? Are going to develop one? > Elaborate, please. > > > but for this the slave has to be attached. > > This is the corresponding lspci entry: > >> 00:1e.5 Serial bus controller [0c80]: Intel Corporation Atom Processor > > Z36xxx/Z37xxx Series LPIO1 SPI Controller (rev 11) > > PCIe vendor and product ID is 8086:0f0e > > It's not what we are interested to see :-) > > Basically you need > a) not ancient kernel (what's version of yours?); > b) check proper ACPI node for the PCIe device (something like _SB.PCI0.SPI1). You can find the node by running following command # cat /sys/bus/pci/devices/0000:00:1e.5/firmware_node/path -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html