From mboxrd@z Thu Jan 1 00:00:00 1970 To: Dan Malek Cc: "barry.fisher" , linuxppc-embedded@lists.linuxppc.org Subject: Re: Need SPI support From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Mon, 11 Mar 2002 13:56:13 EST." <3C8CFDCD.6080600@embeddededge.com> Date: Mon, 11 Mar 2002 22:03:14 +0100 Message-Id: <20020311210319.B28C310BF2@denx.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message <3C8CFDCD.6080600@embeddededge.com> you wrote: > > > Does anyone know where I might get some code to support Motorola 8260 > > Serial Peripheral Interface (SPI) for Linux. ... > The controller set up is trivial, just copy the guts of managing BDs > from something else, like I2C. The SPI implementations typically have > board specific methods for device selection and devices that may be > sensitive to whether the clock keeps running. A generic driver is ... and devices that need frame sync signals, etc. SPI looks fine as long as you just look at the specification, but you soon discover the ugly side when you have to use it. > challenging due to these board variations, but a skeleton driver > would be useful. > > Wolfgang, do you have something that isn't checked into BK sources :-)? Nothing for the 8260. In PPCBoot there is a polled mode driver (cpu/mpc8xx/spi.c) which could easily be adapted. The Linux stuff we have on 8xx is (1) not really ready yet and (2) extremely special (building a multiprocessor system from a 823 and two DSP's). Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de There are two ways to write error-free programs. Only the third one works. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/