Title: Changing debug output from uart2 to uart1 in Android5.1 [Print This Page] Author: kiwor Time: 1/15/2018 16:04 Title: Changing debug output from uart2 to uart1 in Android5.1 Hi everyone,
I want to change the debug output of the Android5.1 image on my fireprime S from uart2 to uart1.
To do so, I have added
&spi0 {
status = "disabled";
};
&uart1 {
status = "okay";
dma-names = "!tx", "!rx";
pinctrl-0 = <&uart1_xfer &uart1_cts>;
};
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in the rk3128-fireprime device-tree file and set the "Debug UART" option to 1 (menuconfig->System Type->Debug UART).
Then I have built the whole Android image following the instructions in the wiki (http://en.t-firefly.com/doc/product/info/id/301.html) and created the update.img after changing "console=ttyFIQ0" to "console=ttyS1" in "parameter" file. After flashing the update.img I can see ttyS1 in /dev but the debug output is still on uart2...
Did someone try to change the debug output ? If so, how did you manage to make it work ?
Thank you in advance for your help Author: leung先森 Time: 1/16/2018 10:35
Not suggest to do it changed, gpio of the rk3128 is used by other modules .
Do that change maybe cause some function unuseful.Author: kiwor Time: 1/16/2018 16:06
Thank you for your reply !
Searching in the DTS files I have found so far : SPI0, I2C2, rt5036, act8931 nodes using the same GPIOs as UART1and I do not need them.
Can I manage to make it work just by disabling these nodes ?
Do you know if there are other modules concerned by these GPIOs ? Author: kiwor Time: 1/24/2018 16:56
So, my image is still not working...
I have also tried changing fiq-debbuger node in rk312x.dtsi but it is even worse : the kernel does not load anymore.
Someone ?Author: kiwor Time: 2/2/2018 18:31
If someone has the same issue, here is the solution I found :
After disabling every nodes using the same pins as uart1, simply change the value of rockchip,serial-id to 1 in the node "fiq-debugger", then set the "Debug UART" option to 1 in menuconfig. Finally, in the file Android/u-boot/include/configs/rk_default_config.h change the definition of CONFIG_UART_NUM in the rockchip Hardware drivers section to :
#define CONFIG_UART_NUM UART_CH1
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This works for me
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