[Buildroot] [PATCH] package/linux-tools: introduce spi linux tools
Eugen.Hristev at microchip.com
Eugen.Hristev at microchip.com
Thu Jun 4 14:27:07 UTC 2020
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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