[Buildroot] [PATCH] package/linux-tools: introduce spi linux tools

[Eugen.Hristev at microchip.com <Eugen.Hristev@microchip.com>]

On 13.05.2020 22:58, Yann E. MORIN wrote:
> On 2020-05-13 20:46 +0300, Baruch Siach spake thusly:
>> Hi Eugen,
>>
>> On Wed, May 13 2020, Eugen.Hristev at microchip.com wrote:
>>> On 13.05.2020 18:21, Baruch Siach wrote:
>>>> On Wed, May 13 2020, Eugen Hristev wrote:
>>>>> Add new linux tools package : spi. This is present in the Linux Kernel since
>>>>> 4.5.
>>>>> It now includes spidev_test and spidev_fdx tools.
>>>> We have a package for spidev_test already. Consider adding spidev_fdx to
>>>> that package instead.
>>> While I understand your point, you should also consider that all linux
>>> tools have a specific way to build in buildroot, and this I think should
>>> be consistent.
>> Agreed.
>>> And spi tools would be not just spidev_test and might include future
>>> applications, which may or may not have their place in the same spot as
>>> spidev_test .
>> In that case I think you should remove the spidev_test package.
> 
> Yes, I like it that we can drop spidev_test.
> 
> But do it multi-step:
> 
>    - intropduce spidev as a linux-tool
>    - drop the standalone spidev_test
> 
> Do not forget to add legacy handling for it, though; see Config.in.legacy.

Hi Yann and Baruch,

Coming back to this, I noticed that the spidev_test package in buildroot 
is different than the spidev_test from kernel tools.

 From spidev_test package:


Usage: spidev_test [-DsbdlHOLC3]
   -D --device   device to use (default /dev/spidev1.1)
   -s --speed    max speed (Hz)
   -d --delay    delay (usec)
   -b --bpw      bits per word
   -i --input    input data from a file (e.g. "test.bin")
   -o --output   output data to a file (e.g. "results.bin")
   -l --loop     loopback
   -H --cpha     clock phase
   -O --cpol     clock polarity
   -L --lsb      least significant bit first
   -C --cs-high  chip select active high
   -3 --3wire    SI/SO signals shared
   -v --verbose  Verbose (show tx buffer)
   -p            Send data (e.g. "1234\xde\xad")
   -N --no-cs    no chip select
   -R --ready    slave pulls low to pause
   -2 --dual     dual transfer
   -4 --quad     quad transfer

#


 From kernel tools:

https://elixir.bootlin.com/linux/v5.7/source/tools/spi/spidev_test.c#L198

Looks it's a different program, or I am missing something ?

In that case, I would think we cannot supersede the existing spidev_test 
package with the kernel tools.

I would think both should be in the distribution, but how to 
differentiate them ?

Thanks,
Eugen

> 
> Regards,
> Yann E. MORIN.
> 
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