* need help getting SPI controller working on 405EX
@ 2009-08-06 16:08 Nathan French
0 siblings, 0 replies; 6+ messages in thread
From: Nathan French @ 2009-08-06 16:08 UTC (permalink / raw)
To: linuxppc-dev
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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: need help getting SPI controller working on 405EX
2009-08-11 15:59 ` Nathan French
@ 2009-08-11 16:11 ` Stefan Roese
0 siblings, 0 replies; 6+ messages in thread
From: Stefan Roese @ 2009-08-11 16:11 UTC (permalink / raw)
To: Nathan French; +Cc: linuxppc-dev, linuxppc-dev, Lorenz Kolb
On Tuesday 11 August 2009 17:59:26 Nathan French wrote:
> This is good news. Can you point me towards the patch for that?
Sure. Latest version is: "[PATCH v8] spi: Add PPC4xx SPI driver":
http://article.gmane.org/gmane.linux.ports.ppc64.devel/57940
Best regards,
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: need help getting SPI controller working on 405EX
2009-08-11 5:44 ` Stefan Roese
@ 2009-08-11 15:59 ` Nathan French
2009-08-11 16:11 ` Stefan Roese
0 siblings, 1 reply; 6+ messages in thread
From: Nathan French @ 2009-08-11 15:59 UTC (permalink / raw)
To: Stefan Roese; +Cc: linuxppc-dev, linuxppc-dev, Lorenz Kolb
This is good news. Can you point me towards the patch for that?
Nathan
On Tue, 2009-08-11 at 01:44 -0400, Stefan Roese wrote:
> On Monday 10 August 2009 18:07:15 Nathan French wrote:
> > > At least something similar worked for me some months ago (before we
> > > switched to a "real" driver for some custom peripheral).
> >
> > Did this work on a 4xx PowerPC platform? Or something else? I've been
> > told that there is no SPI driver for 4xx. If you have done this on 4xx
> > then I'm very interested.
>
> The 4xx SPI driver is (finally) queued for 2.6.32. So you either need to
> manually apply it now or wait a while.
>
> Best regards,
> Stefan
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: need help getting SPI controller working on 405EX
2009-08-10 16:07 ` Nathan French
@ 2009-08-11 5:44 ` Stefan Roese
2009-08-11 15:59 ` Nathan French
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Roese @ 2009-08-11 5:44 UTC (permalink / raw)
To: linuxppc-dev; +Cc: linuxppc-dev, Nathan French, Lorenz Kolb
On Monday 10 August 2009 18:07:15 Nathan French wrote:
> > At least something similar worked for me some months ago (before we
> > switched to a "real" driver for some custom peripheral).
>
> Did this work on a 4xx PowerPC platform? Or something else? I've been
> told that there is no SPI driver for 4xx. If you have done this on 4xx
> then I'm very interested.
The 4xx SPI driver is (finally) queued for 2.6.32. So you either need to
manually apply it now or wait a while.
Best regards,
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: need help getting SPI controller working on 405EX
2009-08-09 13:38 ` Lorenz Kolb
@ 2009-08-10 16:07 ` Nathan French
2009-08-11 5:44 ` Stefan Roese
0 siblings, 1 reply; 6+ messages in thread
From: Nathan French @ 2009-08-10 16:07 UTC (permalink / raw)
To: Lorenz Kolb; +Cc: linuxppc-dev
Lorenz, thanks for the reply.
> For getting spidev devices you have to add entries for an spidev device
> to your newly created spi-"bus". So what you are currently missing are
> the spidev child-nodes in the device tree.
> As I'm currently cut off from some device to test, no guaranty that it
> will work, but your dts entry should look something like:
>
> SPI0: spi@ef600600 {
> cell-index = <0>;
> compatible = "ibm,spi-405ex", "ibm,spi";
> reg = <ef600600 6>;
> interrupts = <8 4>;
> interrupt-parent = <&UIC0>;
> mode = "cpu";
>
> yourdevice@0 {
> compatible = "spidev";
> spi-max-frequency = <1000000>; /* what ever your
> max-freq. is */
> reg = <0>; /* Chipselect-address */
> };
> };
This did not appear to have any effect.
> At least something similar worked for me some months ago (before we
> switched to a "real" driver for some custom peripheral).
Did this work on a 4xx PowerPC platform? Or something else? I've been
told that there is no SPI driver for 4xx. If you have done this on 4xx
then I'm very interested.
Thanks,
Nathan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: need help getting SPI controller working on 405EX
[not found] <1249574886.3747.2650.camel__48649.694157257$1249575290$gmane$org@localhost.localdomain>
@ 2009-08-09 13:38 ` Lorenz Kolb
2009-08-10 16:07 ` Nathan French
0 siblings, 1 reply; 6+ messages in thread
From: Lorenz Kolb @ 2009-08-09 13:38 UTC (permalink / raw)
To: linuxppc-dev
Nathan French wrote:
> Hi, I am trying to add support for the 405EX's SPI controller on a Kilauea board. I've added the below to the device tree (under plb/opb/):
>
> [nfrench@nfrench-laptop linux-2.6-denx]$ 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 {
>
That entry within the device tree will generally make the spi-"bus"
known to Linux, that's ok so far.
> 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?
For getting spidev devices you have to add entries for an spidev device
to your newly created spi-"bus". So what you are currently missing are
the spidev child-nodes in the device tree.
As I'm currently cut off from some device to test, no guaranty that it
will work, but your dts entry should look something like:
SPI0: spi@ef600600 {
cell-index = <0>;
compatible = "ibm,spi-405ex", "ibm,spi";
reg = <ef600600 6>;
interrupts = <8 4>;
interrupt-parent = <&UIC0>;
mode = "cpu";
yourdevice@0 {
compatible = "spidev";
spi-max-frequency = <1000000>; /* what ever your
max-freq. is */
reg = <0>; /* Chipselect-address */
};
};
>
> Thanks,
>
> Nathan French
At least something similar worked for me some months ago (before we
switched to a "real" driver for some custom peripheral).
Regards,
Lorenz
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-08-11 16:11 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-08-06 16:08 need help getting SPI controller working on 405EX Nathan French
[not found] <1249574886.3747.2650.camel__48649.694157257$1249575290$gmane$org@localhost.localdomain>
2009-08-09 13:38 ` Lorenz Kolb
2009-08-10 16:07 ` Nathan French
2009-08-11 5:44 ` Stefan Roese
2009-08-11 15:59 ` Nathan French
2009-08-11 16:11 ` Stefan Roese
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