SPI device node is not created

[plauria]

Hi

after loading the cape and drivers, there is no spi device created in /dev. This is with kernel 4.4.30-ti-r64. I've 'successfully' used insmod - all I see in dmesg is, after loading spislave core, the message :

spislavecore: function: init

Then I loaded spi-mcspi-slave.ko. Any ideas on what might have gone wrong? I have confirmed the SPI0_slave cape is the only one loaded and that spi_omap2_mcspi is blacklisted.

edit: I also tried the SPI1_slave cape to no effect. It doesn't look like the driver is properly initializing.

Can you let me know what kernel version I should be using for this to work?

[plauria]

Some modinfo: root@beaglebone:~# modinfo spi-mcspi-slave.ko filename: /root/spi-mcspi-slave.ko version: 1.0 description: SPI slave for McSPI controller. author: Patryk Mezydlo, mezydlo.p@gmail.com license: GPL v2 srcversion: F271B69947F792D8656DC9B alias: of:NTCspislave,spi-slave-debug* depends: spi-slave-core vermagic: 4.4.30-ti-r64 SMP mod_unload modversions ARMv7 p2v8

root@beaglebone:~# lsmod Module Size Used by spi_mcspi_slave 10312 0 spi_slave_core 9711 1 spi_mcspi_slave omap_aes_driver 23889 0 omap_sham 26513 0 omap_rng 5544 0 rng_core 9066 1 omap_rng evdev 13511 1 uio_pdrv_genirq 3923 0 uio 10524 1 uio_pdrv_genirq usb_f_acm 8361 1 u_serial 13753 3 usb_f_acm usb_f_rndis 25865 1 g_multi 6010 0 usb_f_mass_storage 49849 2 g_multi u_ether 14413 2 usb_f_rndis,g_multi libcomposite 53554 4 usb_f_acm,usb_f_rndis,g_multi,usb_f_mass_storage

Relevant dmesg:

[ 58.160486] bone_capemgr bone_capemgr: part_number 'SPI1_slave', version 'N/A' [ 58.160570] bone_capemgr bone_capemgr: slot #4: override [ 58.160613] bone_capemgr bone_capemgr: Using override eeprom data at slot 4 [ 58.160659] bone_capemgr bone_capemgr: slot #4: 'Override Board Name,00A0,Override Manuf,SPI1_slave' [ 58.199652] bone_capemgr bone_capemgr: slot #4: dtbo 'SPI1_slave-00A0.dtbo' loaded; overlay id #0 [ 99.350535] spislavecore: function: init

Checking slots: root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,SPI1_slave

[pmezydlo]

Hi,

Can you give me some time, I need to compile new kernel version for check it. Now I'm very busy. This weekend I will try to take care of it. Of what I remember about what you say I had no problem. Unfortunately, I do not support this project because probably soon kernel will support spi slave.

Patryk

[plauria]

Ok, thanks so much Patryk! If you need any other info from me just let me know, I appreciate you taking time for this project!

[ghost]

hi same problem at 4.4.8-ti-r22

dmesg [ 92.725630] bone_capemgr bone_capemgr: part_number 'SPI0_slave', version 'N/A' [ 92.725705] bone_capemgr bone_capemgr: slot #5: override [ 92.725747] bone_capemgr bone_capemgr: Using override eeprom data at slot 5 [ 92.725794] bone_capemgr bone_capemgr: slot #5: 'Override Board Name,00A0,Override Manuf,SPI0_slave' [ 92.754980] bone_capemgr bone_capemgr: slot #5: dtbo 'SPI0_slave-00A0.dtbo' loaded; overlay id #0 [ 119.916688] spislavecore: function: init

root@beaglebone:/home/debian/# lsmod Module Size Used by binfmt_misc 8862 1 spi_mcspi_slave 9077 0 spi_slave_core 8796 1 spi_mcspi_slave

and SPI device node is not created..

[WolfWalter]

Had the same problem but with yocto and kernel 4.10. and found that after the latest commit the compatible strings in the dts files and spi-mcspi-slave.c did not match.

Changing that string fixed it for me.

diff --git a/driver/spi-mcspi-slave.c b/driver/spi-mcspi-slave.c
index b403ae0..2c6438e 100644
--- a/driver/spi-mcspi-slave.c
+++ b/driver/spi-mcspi-slave.c
@@ -569,7 +569,7 @@ struct omap2_mcspi_platform_config mcspi_slave_pdata = {

 const struct of_device_id mcspi_slave_of_match[] = {
    {
-       .compatible = "spislave,spi-slave-debug",
+       .compatible = "ti,omap4-mcspi-slave",
        .data = &mcspi_slave_pdata,
    },
    { }
-- 
2.11.0

Now I'm curios if the module acctually works :)

[songta2005]

hi I use the linux3.8.13-bone86. I have the same problem that can not find the /dev/spisalvedev device. so I try to modify the function in the file "spi-slave-dev.c'. In function "spislave_probe" ,I modify the function as the following: dev=device_create(spislave_class,&spi->dev,data->devt,data,"spislave%d,%d",SPISLAVE_MAJOR,data->id); I can find the device in the /dev now!