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Subject: need help getting SPI controller working on 405EX
From: Nathan French <nathan.french@onrampwireless.com>
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Date: Thu, 6 Aug 2009 09:08:06 -0700
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Hi, I am trying to add support for the 405EX's SPI controller on a Kilauea board.  I've added the below to the device tree (under plb/opb/):

[nfrench@nfrench-laptop linux-2.6-denx]$ diff -C2 arch/powerpc/boot/dts/kilauea.dts spi.dts
*** arch/powerpc/boot/dts/kilauea.dts	2009-05-05 15:56:16.000000000 -0700
--- spi.dts	2009-08-06 08:42:19.000000000 -0700
***************
*** 207,210 ****
--- 207,221 ----
  				#size-cells = <0>;
  			};
+             
+             SPI0: spi@ef600600 {
+                 cell-index = <0>;
+                 compatible = "ibm,spi-405ex", "ibm,spi";
+                 reg = <ef600600 6>;
+                 interrupts = <8 4>;
+                 interrupt-parent = <&UIC0>;
+                 mode = "cpu";
+             };
  
  			RGMII0: emac-rgmii@ef600b00 {

I've also compiled my kernel with the following enabled:

        CONFIG_SPI=y
        CONFIG_SPI_MASTER=y
        CONFIG_SPI_SPIDEV=y

I see this make it into the device tree after boot:

        [root@10.2.3.28 /]$ find /proc/device-tree/ | grep spi
        /proc/device-tree/plb/opb/spi@ef600600
        /proc/device-tree/plb/opb/spi@ef600600/name
        /proc/device-tree/plb/opb/spi@ef600600/mode
        /proc/device-tree/plb/opb/spi@ef600600/interrupt-parent
        /proc/device-tree/plb/opb/spi@ef600600/interrupts
        /proc/device-tree/plb/opb/spi@ef600600/reg
        /proc/device-tree/plb/opb/spi@ef600600/compatible
        /proc/device-tree/plb/opb/spi@ef600600/cell-index

But I don't see any /dev/spidev* devices created or any mention of SPI
at boot time.  I'm starting to suspect that I don't have the kernel
configured right, otherwise I would see at least the SPI driver
complaining about something, right?

Thanks,

Nathan French