From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Stein Subject: x86: Add SPI slaves to PCIe SPI master? Date: Wed, 11 Jan 2017 16:08:41 +0100 Message-ID: <3363354.jZif7TNsT8@ws-stein> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Hi, I have a customer board using Baytrail E3805 CPU. I want to access a chip attached to SPI using spidev. 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 I tried using the following entry in APCI DSDT as a subnode to the SPI device: > Device (TAMP) > { > Name (_ADR, 1) > Name (_CID, "SPT0001") // Dummy name for spidev > Method (_CRS, 0, Serialized) // _CRS: Current Resource Settings > { > Name (UBUF, ResourceTemplate () > { > SPISerialBus > ( > 1, //Slave select CS0 (_ADR) > PolarityLow, //Polarity of CS0 output(_DPL) > FourWireMode, //(_MOD) > 8, //8-bit frame(_LEN) > ControllerInitiated, //(_SLV) > 2000000, //Speed Hz (_SPE) > ClockPolarityLow, //(_POL) > ClockPhaseFirst, //(_PHA) > "\\_SB.SPI1", //Controller > ) > }) > Return (UBUF) > } > > Method (_STA, 0, NotSerialized) // _STA: Status > { > Return (0x0F) > } > } Apparently this only works when the device is probed by ACPI but not when using PCIe (driver: pxa2xx_spi_pci). So I am wondering: How can I add a slave to this PCIe spi master. Best regards, Alexander -- Dipl.-Inf. Alexander Stein SYS TEC electronic GmbH alexander.stein-93q1YBGzJSMe9JSWTWOYM3xStJ4P+DSV@public.gmane.org Legal and Commercial Address: Am Windrad 2 08468 Heinsdorfergrund Germany Office: +49 (0) 3765 38600-0 Fax: +49 (0) 3765 38600-4100 Managing Directors: Director Technology/CEO: Dipl.-Phys. Siegmar Schmidt; Director Commercial Affairs/COO: Dipl. Ing. (FH) Armin von Collrepp Commercial Registry: Amtsgericht Chemnitz, HRB 28082; USt.-Id Nr. DE150534010 -- 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