On 07/03/2014 01:11 AM, Richard Leitner wrote:
> Hello folks,
> I've a general question regarding the linux-tegra development:
> Why are there tegra features which are available in NVIDIA's kernel tree
> [1], but not included in mainline (or at least your tegra tree)?
> I've just noticed that for the USB device controller
> (drivers/usb/gadget/tegra_udc.{c,h}), but it seems there are more such
> "cases".
Just like I think Marc already responded, It's simply a matter of
resources; the upstreaming team isn't as large as the product team.
> Is there any documentation on what is supported/included in mainline
> already and what not?
I don't believe so, no.
The main features I can think of are:
* Various power/performance optimizations.
* Various IO controllers on newer chips (such as SATA, Tegra124 PCIe,
USB3), although there are patches sent for all of these now. NOR flash,
I2C/SPI slave mode, one-wire, perhaps a few other minor IO controllers.
* Various features in supported IO controllers (e.g. high-speed eMMC/SD
modes, USB2 bus suspend, ...)
* USB device mode.
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