arm: zynq: zybo z7: fix SPL uart init bitrate

From: Milan Obuch <u-boot at dino.sk>

The board uses 100 MHz clock for UART bitrate generator,
but is configured as 50 MHz on defconfig.

This produces wrong console output.
The first message, "Debug uart enabled" is received as:
"������b"

Fix the issue by configuring the correct clock for the
UART baudrate generator

Signed-off-by: Milan Obuch <u-boot at dino.sk>
Signed-off-by: Luis Araneda <luaraneda at gmail.com>
---

This changes were originally sent by Milan Obuch using a diff format.
As he didn't know how to properly send git patches to the mailing list,
I converted them to a git commit, rephrased the commit message and added
the Signed-off-by tags.

Milan Obuch then review and approved the current state of the patch.

Tested on a zybo z7-20 board by me

 configs/zynq_zybo_z7_defconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

On 20. 01. 20 2:32, Luis Araneda wrote:
> From: Milan Obuch <u-boot at dino.sk>
> 
> The board uses 100 MHz clock for UART bitrate generator,
> but is configured as 50 MHz on defconfig.
> 
> This produces wrong console output.
> The first message, "Debug uart enabled" is received as:
> "������b"
> 
> Fix the issue by configuring the correct clock for the
> UART baudrate generator
> 
> Signed-off-by: Milan Obuch <u-boot at dino.sk>
> Signed-off-by: Luis Araneda <luaraneda at gmail.com>
> ---
> 
> This changes were originally sent by Milan Obuch using a diff format.
> As he didn't know how to properly send git patches to the mailing list,
> I converted them to a git commit, rephrased the commit message and added
> the Signed-off-by tags.
> 
> Milan Obuch then review and approved the current state of the patch.
> 
> Tested on a zybo z7-20 board by me
> 
>  configs/zynq_zybo_z7_defconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/configs/zynq_zybo_z7_defconfig b/configs/zynq_zybo_z7_defconfig
> index 7129e2b5f3..f41d6574f7 100644
> --- a/configs/zynq_zybo_z7_defconfig
> +++ b/configs/zynq_zybo_z7_defconfig
> @@ -5,7 +5,7 @@ CONFIG_SYS_TEXT_BASE=0x4000000
>  CONFIG_SPL_STACK_R_ADDR=0x200000
>  CONFIG_SPL=y
>  CONFIG_DEBUG_UART_BASE=0xe0001000
> -CONFIG_DEBUG_UART_CLOCK=50000000
> +CONFIG_DEBUG_UART_CLOCK=100000000
>  CONFIG_DEBUG_UART=y
>  CONFIG_DISTRO_DEFAULTS=y
>  CONFIG_SYS_CUSTOM_LDSCRIPT=y
> 

Applied.
M