On Tue, Aug 26, 2014 at 8:28 PM, Robert Nelson <robertcnel...@gmail.com> wrote:
> On Tue, Aug 26, 2014 at 8:05 PM, Dallas Clement
> <dallas.a.clem...@gmail.com> wrote:
>> Hi All,
>>
>> I am trying to enable both SPI devices in the 3.14 kernel for a beaglebone
>> black. I understand that the capemgr support is no longer there. I need
>> some tips on how to enable these devices in the kernel. I don't care if it
>> is done statically at kernel build time. My application has no need to
>> runtime enabling/disabling as is possible with capemgr and device tree
>> overlays.
>>
>> I see device tree source for spi0 but not spi1 in the 3.14 kernel source.
>>
>> ./arch/arm/boot/dts/am335x-bone-spi0-spidev.dtsi
>>
>> Looks like SPI support is half-baked. I am pulling my source from here:
>>
>> https://github.com/beagleboard/linux.git
>>
>> Am I going down the wrong path with 3.14? Building from the 3.8 branch in
>> this repo has compilation errors.
>
> Well, looks we have a volunteer.. Apply this on top of the latest 3.14
> branch (i force pushed out an update about an hour ago)
>
> Just enable either spi1/spi1a via:
>
> #include "am335x-bone-spi1-spidev.dtsi"
> (or)
> #include "am335x-bone-spi1a-spidev.dtsi"
btw:
crap, forgot to update the spidev node names: if you have spi0-spidev
or the bottom am335x-bone-basic-proto-cape.dtsi enabled, you'll get
this error:
ERROR (duplicate_label): Duplicate label 'spidev0' on
/ocp/spi@481a0000/spi@0 and /ocp/spi@48030000/spi@0
ERROR (duplicate_label): Duplicate label 'spidev1' on
/ocp/spi@481a0000/spi@1 and /ocp/spi@48030000/spi@1
ERROR: Input tree has errors, aborting (use -f to force output)
Makefile:121: recipe for target 'src/arm/am335x-boneblack.dtb' failed
make[1]: *** [src/arm/am335x-boneblack.dtb] Error 2
This fixes that..
diff --git a/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
b/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
index 24013d8a6b..5bc03e8 100644
--- a/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
@@ -11,14 +11,14 @@
pinctrl-0 = <&spi1_pins>;
status = "okay";
- spidev0: spi@0 {
+ spidev2: spi@0 {
compatible = "spidev";
reg = <0>;
spi-max-frequency = <16000000>;
spi-cpha;
};
- spidev1: spi@1 {
+ spidev3: spi@1 {
compatible = "spidev";
reg = <1>;
spi-max-frequency = <16000000>;
diff --git a/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
b/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
index b2185dd..3aded7b 100644
--- a/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
@@ -11,14 +11,14 @@
pinctrl-0 = <&spi1a_pins>;
status = "okay";
- spidev0: spi@0 {
+ spidev2: spi@0 {
compatible = "spidev";
reg = <0>;
spi-max-frequency = <16000000>;
spi-cpha;
};
- spidev1: spi@1 {
+ spidev3: spi@1 {
compatible = "spidev";
reg = <1>;
spi-max-frequency = <16000000>;
you know.. half baked.. ;) Just got all the lcd's working today, spi1
hasn't been a priorty as i don't have a cape that uses it...
Regards,
--
Robert Nelson
http://www.rcn-ee.com/
--
For more options, visit http://beagleboard.org/discuss
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