I have interfaced max 14830 quad serial UART IC with iMX6UL over SPI bus. I am able to the read revision id and registers of the MAX14830.
I am trying to check the transmission and reception using the internal loopback test on the UART. I am transmitting the data from internal minicom. Configuration of the UART updated correctly on the 14830 registers. I am able to send the data ( char) over the UART. I have set loopback bit in the mode2 register, so that i can receive same char on the minicom console, but unable to receive the data.
I am debugging the driver,
max310x Startup
configure mode1
configure mode2
mode1=[80],mode2=[28],irqstat=[60]
[max310x_set_termios]
Read LCR Register = [3]
Read Flow control Register = [88]
get baud rate gen config =[9600]
[max310x_set_baud]
Set baud rate =[9603]
[max310x_set_mctrl]
[max310x_md_proc]
md: mode2 reg= [28]
[max310x_set_termios]
Read LCR Register = [3]
Read Flow control Register = [0]
get baud rate gen config =[115200]
[max310x_set_baud]
Set baud rate =[115385]
[max310x_start_tx]
[max310x_handle_tx]
To send [1]
[a]
I am expecting start rx , but not receiving anything.
What could be wrong? any suggestion. Please help.
## DTS file ###
max14830: max14830@0 {
compatible = "maxim,max14830";
reg = <0>;
mode = <0>;
clocks = <&clk20m>;
clock-names = "osc";
interrupt-parent = <&gpio1>;
interrupts = <20 IRQ_TYPE_LEVEL_LOW 0>;
//interrupts = <20 IRQ_TYPE_EDGE_FALLING >; ( here i have tried multiple combination )
gpio-controller;
#gpio-cells = <2>;
spi-max-frequency = <26000000>;
};
Thanks,
Surendra
