From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: Question about "missing" tegra features Date: Mon, 21 Jul 2014 09:18:13 -0600 Message-ID: <53CD2F35.4000804@wwwdotorg.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Richard Leitner Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-tegra@vger.kernel.org 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.