Changing The Boot console

hrushinale — Fri, 10 Jun 2016 09:32:10 GMT

HI ,

I am facing the problem related to serial console . The default console given for our board is at UART1 bu I change it to UART 2.For that I made the below changes in U-boot:

#define CONFIG_MXC_UART_BASE UART2_BASE

#define CONFIG_CONSOLE_DEV "ttymxc1"

also configured the UART in customboard.c file like

iomux_v3_cfg_t const uart2_pads[] = {

MX6_PAD_SD3_DAT5__UART2_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),

MX6_PAD_SD3_DAT4__UART2_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),

MX6_PAD_SD3_CMD__UART2_RTS_B | MUX_PAD_CTRL(UART_PAD_CTRL),

MX6_PAD_SD3_CLK__UART2_CTS_B | MUX_PAD_CTRL(UART_PAD_CTRL),

};

static void setup_iomux_uart(void)

{

imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));

imx_iomux_v3_setup_multiple_pads(uart2_pads, ARRAY_SIZE(uart2_pads));

}

int board_early_init_f(void)

{

setup_iomux_uart();

}

After doing all these changes when we connect the board its showing garbage value.. But when kernel is loaded then its showing messages on UART2.Please Suggest the solution.

Regards,

hrushi

Re: Changing The Boot console

igorpadykov — Sat, 11 Jun 2016 00:59:54 GMT

Hi Hrushi

one can debug it using attached Porting Guide

sect.1.4 Debugging, please check uboot/drivers/serial/serial_mxc.c

Best regards

igor

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Changing The Boot console

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