[Ksummit-2013-discuss] ARM topic: Is DT on ARM the solution, or is there something better?
From: s.hauer@pengutronix.de (Sascha Hauer)
Date: 2013-10-24 08:06:24
Also in:
linux-devicetree
On Wed, Oct 23, 2013 at 12:54:35PM -0600, Jason Gunthorpe wrote:
On Wed, Oct 23, 2013 at 08:30:42PM +0200, Richard Cochran wrote:quoted
On Wed, Oct 23, 2013 at 12:25:02PM -0600, Jason Gunthorpe wrote:quoted
quoted
On ARM the package of 'stuff' can very reasonably include dtb. Distro scripts can package modules+DTB+vmlinuz into something the bootloader can understand. (The next pain point will be to standardize that) The DTB doesn't have to be 'outside' the distro/kernel to give users a seamless upgrade experience.How can a distro possibly provide me a DTB? They don't know what hardware I am using. Only I know that.I'm not sure what you are asking? Treat DTBs like kernel drivers. If you make hardware and you want distros to run on it, you have to provide the DTB for that hardware to mainline+distros. Remember, there are two ways to view DTB: a) It comes from the firmware and you have to live with whatever crap the firmware does b) It comes from the kernel, must match the kernel, and we don't have to tolerate crap in the DTB.
c) It comes from the firmware and is at least good enough to bring up a kernel to install a better devicetree. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |