[PATCH v1] ARM: imx8mm: verdin-imx8mm: fix board hang in spl

[Marcel Ziswiler]

On Tue, 2022-05-17 at 00:21 +0200, Marcel Ziswiler wrote:
> From: Marcel Ziswiler <marcel.ziswiler at toradex.com>
> 
> Move the preloader_console_init() call after spl_early_init() to avoid
> board hang in SPL.
> 
> While at it remove explicit in-code console/debug UART pinmuxing (uart1
> and its pinmuxing are already marked as u-boot,dm-spl via device tree).
> 
> Fixes: 4551e1898769 ("configs: verdin-imx8mm: verdin-imx8mp: enable dm serial")
> Signed-off-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>
> 
> ---
> I only very recently this weekend learned that verdin-imx8mm has such
> hang early in SPL issue due to it missing to move the
> preloader_console_init() call similar as to what Peng did in [1].

Any comments?

Could somebody please pull this one in ASAP as it is currently really broken. Thanks!

> Unfortunately, this likely breaks Peng's [V2,00/14] imx8m: convert to
> DM_SERIAL series of late [2] and would need applying before ASAP.
> 
> Sorry about that.
> 
> [1] https://patchwork.ozlabs.org/project/uboot/patch/20220415043538.27868-3-peng.fan@oss.nxp.com/
> [2] https://patchwork.ozlabs.org/project/uboot/cover/20220505074341.24086-1-peng.fan@oss.nxp.com/
> 
>  board/toradex/verdin-imx8mm/spl.c | 13 ++-----------
>  1 file changed, 2 insertions(+), 11 deletions(-)
> 
> diff --git a/board/toradex/verdin-imx8mm/spl.c b/board/toradex/verdin-imx8mm/spl.c
> index 1f3f38351ef..f0361f93ea9 100644
> --- a/board/toradex/verdin-imx8mm/spl.c
> +++ b/board/toradex/verdin-imx8mm/spl.c
> @@ -74,15 +74,8 @@ int board_fit_config_name_match(const char *name)
>  }
>  #endif
>  
> -#define UART_PAD_CTRL  (PAD_CTL_PUE | PAD_CTL_PE | PAD_CTL_DSE4)
>  #define WDOG_PAD_CTRL  (PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)
>  
> -/* Verdin UART_3, Console/Debug UART */
> -static iomux_v3_cfg_t const uart_pads[] = {
> -       IMX8MM_PAD_SAI2_RXFS_UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
> -       IMX8MM_PAD_SAI2_RXC_UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
> -};
> -
>  static iomux_v3_cfg_t const wdog_pads[] = {
>         IMX8MM_PAD_GPIO1_IO02_WDOG1_WDOG_B  | MUX_PAD_CTRL(WDOG_PAD_CTRL),
>  };
> @@ -96,8 +89,6 @@ __weak void board_early_init(void)
>         imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
>  
>         set_wdog_reset(wdog);
> -
> -       imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
>  }
>  
>  int power_init_board(void)
> @@ -143,8 +134,6 @@ void board_init_f(ulong dummy)
>  
>         timer_init();
>  
> -       preloader_console_init();
> -
>         /* Clear the BSS. */
>         memset(__bss_start, 0, __bss_end - __bss_start);
>  
> @@ -162,6 +151,8 @@ void board_init_f(ulong dummy)
>                 hang();
>         }
>  
> +       preloader_console_init();
> +
>         enable_tzc380();
>  
>         power_init_board();