Hi Stefan,

On Mon, Sep 5, 2016 at 5:03 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 Cc: Bin Meng bmeng.cn@gmail.com Cc: Simon Glass sjg@chromium.org

---

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

Reviewed-by: Bin Meng bmeng.cn@gmail.com

One nits below:

diff --git a/board/congatec/conga-qeval20-qa3-e3845/README b/board/congatec/conga-qeval20-qa3-e3845/README new file mode 100644 index 0000000..a784f3c --- /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.

nits: the ending period should be ,

+Which is routed from the QSeven SoM to the X300 connector on the

nits: Which -> which

+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.

Regards, Bin