diff mbox

[U-Boot,v2] x86: conga-qeval20-qa3: Add README to explain the console UART options

Message ID 20160909054549.19787-1-sr@denx.de
State Accepted
Commit df233e734fb70076c0434b242594476332208ee0
Delegated to: Bin Meng
Headers show

Commit Message

Stefan Roese Sept. 9, 2016, 5:45 a.m. UTC 
This patch adds a small README to explain the 2 defconfig files and its
usage for the different console UART options.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
---
v2:
- Minor change in the text as suggested by Bin

 board/congatec/conga-qeval20-qa3-e3845/README | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 board/congatec/conga-qeval20-qa3-e3845/README

Comments

Bin Meng Sept. 26, 2016, 6:37 a.m. UTC | #1 
On Fri, Sep 9, 2016 at 1:45 PM, Stefan Roese <sr@denx.de> wrote:
> This patch adds a small README to explain the 2 defconfig files and its
> usage for the different console UART options.
>
> Signed-off-by: Stefan Roese <sr@denx.de>
> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
> Cc: Simon Glass <sjg@chromium.org>
> ---
> v2:
> - Minor change in the text as suggested by Bin
>
>  board/congatec/conga-qeval20-qa3-e3845/README | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 board/congatec/conga-qeval20-qa3-e3845/README
>

applied to u-boot-x86, thanks!
diff mbox

Patch

diff --git a/board/congatec/conga-qeval20-qa3-e3845/README b/board/congatec/conga-qeval20-qa3-e3845/README
new file mode 100644
index 0000000..98ff992
--- /dev/null
+++ b/board/congatec/conga-qeval20-qa3-e3845/README
@@ -0,0 +1,23 @@ 
+------------------------------
+U-Boot console UART selection:
+------------------------------
+
+The U-Boot port for this congatec board currently supports two different
+configurations (defconfig files). The only difference is the UART that
+is used as the U-Boot console UART. The default defconfig file:
+
+conga-qeval20-qa3-e3845_defconfig
+
+provides this console on the UART0 which is provided via a Winbond
+Super-IO chip connected on the congatec Qseven 2.0 evaluation carrier
+board (conga-QEVAL). This UART is the one provided with a SubD9
+connector on the mainboard (the low one). The 2nd defconfig file:
+
+conga-qeval20-qa3-e3845-internal-uart_defconfig
+
+provides the U-Boot console on the BayTrail internal legacy UART,
+which is routed from the QSeven SoM to the X300 connector on the
+baseboard. Here is called COM2. The baseboard already provides the
+RS232 level shifters. So a TTL-USB UART adapter does not work in
+this case. The signals need to get connected directly to the
+RS232 level signals of the PC UART via some adapter cable.