Hi Mark, Krzysztof,
On 26/11/2024 13:56, Mark Brown wrote:
On Tue, Nov 26, 2024 at 01:45:28PM +0000, Vishwaroop A wrote:
+ # NVIDIA Tegra SPIDEV Controller device
+ - nvidia,tegra-spidev
All the issues with having spidev nodes directly in the DT also apply if
you add a prefix onto it. Whatever is attached to the SPI controller
needs to be described, not just a placeholder like this.
Chatting with Vishwaroop, what he is trying to accomplish with this
patchset it to have a pseudo SPI device that we can control from userspace.
On the Tegra Jetson boards we have a 40-pin expansion header similar to
what is found on boards like Raspberry Pi and allows users to connect
various cards to. By having a pseudo device we can interact with
different SPI devices.
Yes by default nothing is connected and so there is nothing to talk to.
However, this does enable us to do SPI loopback testing for example.
So I am wondering if it would be acceptable to having some generic dummy
device-tree compatible string for this? I guess it does not need to be
Tegra specific.
Thanks
Jon
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nvpublic
