Re: [PATCH 2/2] ARM: dts: zynq: Add linux, stdout-path and stdout-path

Hi Mark and Simon,

On 02/11/2015 03:25 PM, Michal Simek wrote:

On 02/11/2015 01:40 PM, Mark Rutland wrote:

quoted

On Wed, Feb 11, 2015 at 12:29:02PM +0000, Michal Simek wrote:

quoted

parallella - Use reference instead of hardcoded path
             (linux,stdout-path)

stdout-path is used by bootloader to identify console.

Signed-off-by: Michal Simek <redacted>
---

U-Boot driver model requires stdout-path.
---
 arch/arm/boot/dts/zynq-parallella.dts | 3 ++-
 arch/arm/boot/dts/zynq-zc702.dts      | 2 ++
 arch/arm/boot/dts/zynq-zc706.dts      | 2 ++
 arch/arm/boot/dts/zynq-zed.dts        | 2 ++
 arch/arm/boot/dts/zynq-zybo.dts       | 2 ++
 5 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/zynq-parallella.dts b/arch/arm/boot/dts/zynq-parallella.dts
index 6a5f51daa708..45228a427006 100644
--- a/arch/arm/boot/dts/zynq-parallella.dts
+++ b/arch/arm/boot/dts/zynq-parallella.dts

@@ -35,7 +35,8 @@
 
 	chosen {
 		bootargs = "console=ttyPS0,115200 earlyprintk root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait";
-		linux,stdout-path = "/amba/serial@e0001000";
+		linux,stdout-path = &uart1;
+		stdout-path = &uart1;

Given that you added aliases in the last patch, you can use that to
refer to the serial:

	stdout-path - "serial0:115200n8";

With or without the alias you can encode the UART configuration here
too:

	stdout-path = "/amba/serial@e0001000:115200n8"

let me check this configuration if it is supported by u-boot.

I have converted Linux DTSes to this style and it is working fine.
For U-Boot DM this description is not supported.
Simon: Do you have any plan to support this new description?

Thanks,
Michal