On Fri, Oct 16, 2015 at 04:27:31PM -0600, Simon Glass wrote:
Hi Linus,
On 16 October 2015 at 15:23, Linus Walleij linus.walleij@linaro.org wrote:
On Wed, Oct 14, 2015 at 6:55 PM, Sergey Temerkhanov s.temerkhanov@gmail.com wrote:
On some systems, UART initialization is performed before running U-Boot. This commit allows to skip UART re-initializaion on those systems
Signed-off-by: Sergey Temerkhanov s.temerkhanov@gmail.com Signed-off-by: Radha Mohan Chintakuntla rchintakuntla@cavium.com
Reviewed-by: Simon Glass sjg@chromium.org
(...)
diff --git a/doc/device-tree-bindings/serial/pl01x.txt b/doc/device-tree-bindings/serial/pl01x.txt index 61c27d1..0591497 100644 --- a/doc/device-tree-bindings/serial/pl01x.txt +++ b/doc/device-tree-bindings/serial/pl01x.txt @@ -5,3 +5,6 @@ Required properties:
- reg: exactly one register range with length 0x1000
- clock: input clock frequency for the UART (used to calculate the baud rate divisor)
+Optional properties: +- u-boot,skip-init: skip UART initialization at start.
Again: get this merged in the Linux kernel FIRST. Is it?
We had a little bit of a chat about this at ELCE. It would be great to get these changes merged with the kernel but the amount of push-back/energy it requires is still excessive IMO. Any thoughts?
But it also requires that we try. Did we try here? My first thought is that there's a number of things it would be nice to say "don't re-init stuff" to the kernel as well.