Hi Stephen,
On Fri, Jun 15, 2012 at 1:32 AM, Stephen Warren swarren@wwwdotorg.orgwrote:
On 06/13/2012 10:19 AM, Simon Glass wrote:
Add LCD definitions and also a proposed binding for LCD displays.
The PWFM is in progress on the device-tree-discuss list, so only a very basic binding is offered here.
I believe we have settled on a final representation, it just hasn't been added into linux-next yet. See:
http://gitorious.org/linux-pwm/linux-pwm/commit/d3ce73e5dc86646a6302f2b0f7dd...
Thanks for the pointer. I suppose this doesn't address clocks as yet, but that's fine.
I am not sure if it is better to have the lcd within the display controller as with i2c/spi, or a separate node. From a hardware point of view the LCD is certainly connected to the display controller, so perhaps this version makes most sense. We could have a stand-alone top-level lcd node with a phandle pointing to the display controller, but these doesn't seem to be an obvious advantage to that approach.
Equally, there's been extensive discussion re: how to represent the NVIDIA display controller in DT. I strongly believe that U-Boot shouldn't go ahead in isolation with a binding that's completely unrelated to what's happening in the kernel. Please can you take what Thierry is working on for the kernel, and/or contribute to that binding etc., so we don't end up with multiple ways of doing the same thing. Part of the whole point of DT is to have a single way of representing HW that multiple OSs (or perhaps bootloaders) cna use. If everyone just goes and does their own thing, we've lost.
I can see the email here.
http://lists.freedesktop.org/archives/dri-devel/2012-April/021223.html
I posted this series originally in January. That email is from April, and I don't see activity in the last 2 months. As previously discussed it is not productive to chase a moving target.
Thierry, have you settled on a binding yet? If not do you have something sort-of close that I could use in U-Boot?
Regards. Simon