From: Peter Seiderer <ps.report@gmx.net>
To: buildroot@busybox.net
Subject: [Buildroot] SPI module on Raspberry Pi B+
Date: Fri, 15 Jan 2016 22:35:41 +0100 [thread overview]
Message-ID: <20160115223541.0c4cb053@gmx.net> (raw)
In-Reply-To: <5698EEC2.7030806@yahoo.fr>
Hello David,
On Fri, 15 Jan 2016 14:06:10 +0100, David Picard <davepiq@yahoo.fr> wrote:
> Hello,
>
> I just switched from Buildroot 2015.08.1 to 2015.11.1, and tried to keep
> the same configuration. SPI was working well, before the switch.
>
> Now, I am having some trouble with the SPI driver, namely spi_bcm2835 :
> when I insert the module, there is no log in dmesg output, and nothing
> is created in /sys/bus/spi/devices.
>
Did you try with a fresh build using the 2015.11.1 configs/raspberrypi_defconfig?
Did you enable spi support (on the target SD card) in the config.txt file?
I use the following for hifiberry-dac+ support (and Adafruit PiTFT):
diff -u config.txt_orig config.txt
--- config.txt_orig 2015-09-29 21:11:00.000000000 +0200
+++ config.txt 2015-10-01 21:22:14.000000000 +0200
@@ -18,3 +18,30 @@
gpu_mem_256=100
gpu_mem_512=100
gpu_mem_1024=100
+
+#
+# from https://www.raspberrypi.org/documentation/configuration/device-tree.md
+#
+dtdebug=1
+
+# Uncomment some or all of these to enable the optional hardware interfaces
+dtparam=i2c_arm=on
+dtparam=i2s=on
+dtparam=spi=on
+dtoverlay=hifiberry-dacplus
Regards,
Peter
> I could make it work by loading spi_bcm2708 instead, despite the
> deprecated warning. In this case, I get some logging messages and
> /sys/bus/spi/devices/spi0.0 and /sys/bus/spi/devices/spi0.1 appear.
>
> Any idea ?
>
> David.
>
> ------------------
> Board : Raspberry Pi B+
> Buildroot : 2015.11.1
> SPI peripheral : Adafruit PiTFT 2.8"
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
next prev parent reply other threads:[~2016-01-15 21:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 13:06 [Buildroot] SPI module on Raspberry Pi B+ David Picard
2016-01-15 21:35 ` Peter Seiderer [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-01-15 13:08 David Picard
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