Spi bus enable issue in b01 nano jetson

ankithsingh · March 16, 2022, 3:11pm

kernel_tegra210-p3448-0000-p3449-0000-b00.dtsi (320.6 KB)

Could you please check whether the changes which are done are right or is there are mistake?

ShaneCCC · March 16, 2022, 5:56pm

Remove all of hdr40-pin* {} relative SPI and modify the nvidia,function = spi* directly.

			spi1_mosi_pc0 {
				nvidia,pins = "spi1_mosi_pc0";
				nvidia,function = "rsvd1";
				nvidia,pull = <0x1>;
				nvidia,tristate = <0x1>;
				nvidia,enable-input = <0x0>;
			};

ankithsingh · March 17, 2022, 4:27am

Hello @ShaneCCC Thank you for assisting ,
tegra210-p3448-0002-p3449-0000-b00.dtsi (283.6 KB)
I have made the necessary changes could you please check whether is this correct?

ShaneCCC · March 17, 2022, 4:49am

Just check your dtb to confirm the context that would be good.

ankithsingh · March 17, 2022, 9:27am

Yes I had checked with the dtb file and tried to perform loopback testing by shorting pins 19 & 21 still facing the similar issue as mentioned above of not receving the desired output

ShaneCCC · March 17, 2022, 9:49am

Did you confirm the pin REG?
Or dump the configure from /proc/device-tree/ like below

sudo cat /proc/device-tree/pinmux@700008d4/common/spi*/nvidia,function

nvidia@nvidia-desktop:~$ sudo cat /proc/device-tree/pinmux@700008d4/common/spi*/nvidia,function
spi1spi1spi1spi1spi1spi2spi2spi2spi2spi2nvidia@nvidia-desktop:

ankithsingh · March 18, 2022, 10:44am

Hi shane thank you for your response I have got bit different output than yours, please tell me where all the necessary changes should i make in my dtsi file i have modified nvidia,function = spi* at different points .

cimcon@cimcon-desktop:~$ sudo cat /proc/device-tree/pinmux@700008d4/common/spi*/nvidia,function
spi1spi1spi0spi0spi1rsvd2rsvd1rsvd2rsvd2rsvd2cimcon@cimcon-desktop:

This is what the output i am receiving

Thank you

ankithsingh · March 18, 2022, 10:45am

tegra210-p3448-0002-p3449-0000-b00.dtsi (283.6 KB)

Here is the dtsi file

ShaneCCC · March 18, 2022, 11:21am

From the dump only few PINs configure correct. But the dtsi looks fine. Maybe search all source to configure if any others place need to modify.

ankithsingh · March 21, 2022, 4:52am

cimcon@cimcon-desktop:~$ sudo cat /proc/device-tree/pinmux@700008d4/common/spi*/nvidia,function
spi1spi1spi1spi1spi1rsvd2rsvd1rsvd2rsvd2rsvd2cimcon@cimcon-desktop:

This is how the latest spi* function look like, I have did all the necessary changes to modify still i get the rsvd2, rsvd1, etc… What modifications have to be done please if you could let me know then this might help me close the issue asap.
Whenever I perform loopback testing using spi by shorting pins 19 & 21 I don’t get the desired output, please if you could help in this one more step to close.

Thank you

ShaneCCC · March 21, 2022, 6:28am

The configure should be good for SPI1 aka spidev0.0 from your REG dump. Did you short pin19 &21 to run the spidev_test?

ShaneCCC · March 22, 2022, 1:43am

Have a check this attached on your device.

kernel_tegra210-p3448-0002-p3449-0000-b00-user-custom.dtb (233.6 KB)

ankithsingh · March 22, 2022, 7:17am

Hi shane, when I have used the above sent dtb file and made necessary changes in the extlinux.conf file and as well shorted the pin 19 & 21
kernel_tegra210-p3448-0002-p3449-0000-b00-user-custom.dtb (233.6 KB)
This is how the output looks like

Scenario2: Here the dtb file which I have modified and shared with you when I tried with this
kernel_tegra210-p3448-0002-p3449-0000-b00.dtb (209.6 KB)
and also updated the necessary changes in the extlinux.conf file and shorted the pins 19 & 21 this is how the output looks like

In the both the cases when I try to perform loopback testing i don’t receive any output

ShaneCCC · March 22, 2022, 8:17am

Please run with sudo also check if the /dev/spidev0.0 was created.
If the /dev/spidev0.0 didn’t present you need below command to create it first.

sudo modprobe spidev

nvidia@nvidia-desktop:~$ ./spidev_test -D /dev/spidev0.0 -g32 -s 11000000 -p0  -zzz
using device: /dev/spidev0.0
setting spi mode for read,write
setting spi bpw
setting max speed for rd/wr
spi mode: 0
bits per word: 8 bytes per word: 1
max speed: 11000000 Hz (11000 KHz)
no. runs: 1
Using seed:0x616aa4d5
loop count = 0
using sequential pattern ....
transfer bytes [32]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
transfer: Return actual transfer length: 32
receive bytes [32]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
transfer: received packet size:32 len:32 stat:0
/dev/spidev0.0: TEST PASSED
====== Transfer stats ====
Transmit:
       total: 32B (0KiB 0MiB)
       total: 1P
       ioerr: 0B (0KiB 0MiB)
       ioerr: 0P
 Rate:
  wire total: -1B/s (0KB/s)
       total: -1B/s (0KB/s)
  wire total: -1P/s
       total: -1P/s
Receive:
       total: 32B (0KiB 0MiB)
       total: 1P
        good: 32B (0KiB 0MiB)
        good: 1P
       ioerr: 0P
     dataerr: 0P
 Rate:
        good: -1B/s (0KB/s)
        good: -1P/s
 packet drop: -1/10000

  Total time: 0.000666s

ankithsingh · March 22, 2022, 9:49am

Hi shane

when I enter
$ ls /dev/spi* it shows all the spi present

later it fails to perform the loopback testing

cimcon@cimcon-desktop:~/spidev-test-master$ sudo modprobe spidev
cimcon@cimcon-desktop:~/spidev-test-master$ ls /dev/spi
ls: cannot access ‘/dev/spi’: No such file or directory
cimcon@cimcon-desktop:~/spidev-test-master$ ls /dev/spi*
/dev/spidev0.0 /dev/spidev0.1 /dev/spidev1.0 /dev/spidev1.1
cimcon@cimcon-desktop:~/spidev-test-master$ ls /dev/spidev0.0
/dev/spidev0.0
cimcon@cimcon-desktop:~/spidev-test-master$ ./spidev_test -D /dev/spidev0.0 -v -p “Hello@@”
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)
TX | 48 65 6C 6C 6F 40 40 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ | Hello@@
RX | 00 00 00 00 00 00 00 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ | …
cimcon@cimcon-desktop:~/spidev-test-master$

This is how it shows

ShaneCCC · March 22, 2022, 9:57am

Could you run the command the same as my. Maybe need get the spidev_test binary from here.

sudo pidev_test -D /dev/spidev0.0 -g32 -s 11000000 -p0  -zzz

ankithsingh · March 22, 2022, 10:08am

This is the output I am receiving

cimcon@cimcon-desktop:~$ ./spidev_test -D /dev/spidev0.0 -g32 -s 11000000 -p0 -zzz
using device: /dev/spidev0.0
setting spi mode for read,write
setting spi bpw
setting max speed for rd/wr
spi mode: 0
bits per word: 8 bytes per word: 1
max speed: 11000000 Hz (11000 KHz)
no. runs: 1
Using seed:0x62399fd1
loop count = 0
using sequential pattern …
transfer bytes [32]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
transfer: Return actual transfer length: 32
receive bytes [32]
0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
mismatch index 1
^^^ 00 00 00 00 00 00 00 00 00 00 00 transfer: received packet size:32 len:32 stat:-6
/dev/spidev0.0: TEST FAILED !!! (status:-1)
====== Transfer stats ====
Transmit:
total: 32B (0KiB 0MiB)
total: 1P
ioerr: 0B (0KiB 0MiB)
ioerr: 0P
Rate:
wire total: -1B/s (0KB/s)
total: -1B/s (0KB/s)
wire total: -1P/s
total: -1P/s
Receive:
total: 32B (0KiB 0MiB)
total: 1P
good: 0B (0KiB 0MiB)
good: 0P
ioerr: 0P
dataerr: 1P
Rate:
good: -1B/s (0KB/s)
good: -1P/s
packet drop: -1/10000

Total time: 0.000466s

ShaneCCC · March 22, 2022, 10:20am

Could you try the modification instead of jetson-io in SD card device.
Also attached your dtb here to verify.

ankithsingh · March 22, 2022, 10:24am

kernel_tegra210-p3448-0002-p3449-0000-b00-user-custom.dtb (233.6 KB)

Here is the dtb file. I will try the modification on sd card device.

ShaneCCC · March 22, 2022, 12:02pm

I try your dtb without problem.
The attached file is generate from your system? I my host name in your attached dtb file. (/media/snchen/project/project/32.6/kernel/kernel-4.9/arch/arm64/boot/dts/…/…/.)

./spidev_test -D /dev/spidev0.0 -g32 -s 11000000 -p0  -zzz
using device: /dev/spidev0.0
setting spi mode for read,write
setting spi bpw
setting max speed for rd/wr
spi mode: 0
bits per word: 8 bytes per word: 1
max speed: 11000000 Hz (11000 KHz)
no. runs: 1
Using seed:0x616544a8
loop count = 0
using sequential pattern ....
transfer bytes [32]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
transfer: Return actual transfer length: 32
receive bytes [32]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
transfer: received packet size:32 len:32 stat:0
/dev/spidev0.0: TEST PASSED
====== Transfer stats ====
Transmit:
       total: 32B (0KiB 0MiB)
       total: 1P
       ioerr: 0B (0KiB 0MiB)
       ioerr: 0P
 Rate:
  wire total: -1B/s (0KB/s)
       total: -1B/s (0KB/s)
  wire total: -1P/s
       total: -1P/s
Receive:
       total: 32B (0KiB 0MiB)
       total: 1P
        good: 32B (0KiB 0MiB)
        good: 1P
       ioerr: 0P
     dataerr: 0P
 Rate:
        good: -1B/s (0KB/s)
        good: -1P/s
 packet drop: -1/10000

  Total time: 0.001467s

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Spi bus enable issue in b01 nano jetson

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