[PATCH next 4/5] rockchip: rk3399: allow to handle sysreset-gpio in TPL

[Paul Kocialkowski]

Hi again,

Le Tue 05 Nov 24, 16:36, Quentin Schulz a écrit :
> From: Quentin Schulz <quentin.schulz at cherry.de>
> 
> If TPL_GPIO and TPL_PINCTRL_ROCKCHIP are enabled and a sysreset-gpio is
> provided in the TPL Device Tree, this will trigger a system reset
> similar to what's currently been done in SPL whenever the RK3399 "warm"
> boots.
> 
> There are three reasons for moving this earlier:
> - faster boot time as we don't need to reach SPL to be able to reset the
>   system on a condition we know is already met in TPL,
> - have less code to be impacted by the issue this system reset works
>   around (that is, "unclean" SoC registers after a reboot),
> - less confusion around the reason for restarting. Indeed when done from
>   SPL, the following log can be observed:

Just one other thing here: you could as well remove the call in spl_board_init.
There's just one user of this currently (the Puma board) so I don't think we
need to keep backwards-compatibility in the SPL.

Cheers,

Paul

> """
> U-Boot TPL 2025.01-rc1-00165-gd79216ca9878-dirty (Nov 05 2024 - 15:31:45)
> Channel 0: DDR3, 666MHz
> BW=32 Col=10 Bk=8 CS0 Row=16 CS=1 Die BW=16 Size=2048MB
> Channel 1: DDR3, 666MHz
> BW=32 Col=10 Bk=8 CS0 Row=16 CS=1 Die BW=16 Size=2048MB
> 256B stride
> Trying to boot from BOOTROM
> Returning to boot ROM...
> 
> U-Boot SPL 2025.01-rc1-00165-gd79216ca9878-dirty (Nov 05 2024 - 15:31:45 +0100)
> Trying to boot from MMC2
> 
> U-Boot TPL 2025.01-rc1-00165-gd79216ca9878-dirty (Nov 05 2024 - 15:31:45)
> """
> 
> possibly hinting at an issue within the SPL when loading the fitImage
> from MMC2 instead of the normal course of events (a system reset).
> 
> Signed-off-by: Quentin Schulz <quentin.schulz at cherry.de>
> ---
>  arch/arm/mach-rockchip/rk3399/rk3399.c | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/mach-rockchip/rk3399/rk3399.c b/arch/arm/mach-rockchip/rk3399/rk3399.c
> index 7b6a822ed04b8151a5da147056dbf73ffdafd149..26fd04691699d81f5fecd282964c7b3aff999717 100644
> --- a/arch/arm/mach-rockchip/rk3399/rk3399.c
> +++ b/arch/arm/mach-rockchip/rk3399/rk3399.c
> @@ -169,7 +169,7 @@ void board_debug_uart_init(void)
>  }
>  #endif
>  
> -#if defined(CONFIG_XPL_BUILD) && !defined(CONFIG_TPL_BUILD)
> +#if defined(CONFIG_XPL_BUILD)
>  static void rk3399_force_power_on_reset(void)
>  {
>  	const struct rockchip_cru *cru = rockchip_get_cru();
> @@ -195,9 +195,9 @@ static void rk3399_force_power_on_reset(void)
>  	if (cru->glb_rst_st == 0)
>  		return;
>  
> -	if (!IS_ENABLED(CONFIG_SPL_GPIO)) {
> +	if (!CONFIG_IS_ENABLED(GPIO)) {
>  		debug("%s: trying to force a power-on reset but no GPIO "
> -		      "support in SPL!\n", __func__);
> +		      "support in " PHASE_NAME "!\n", __func__);
>  		return;
>  	}
>  
> @@ -218,6 +218,7 @@ static void rk3399_force_power_on_reset(void)
>  	dm_gpio_set_value(&sysreset_gpio, 1);
>  }
>  
> +# if !defined(CONFIG_TPL_BUILD)
>  void __weak led_setup(void)
>  {
>  }
> @@ -228,4 +229,10 @@ void spl_board_init(void)
>  
>  	rk3399_force_power_on_reset();
>  }
> -#endif
> +# else  // !defined(CONFIG_TPL_BUILD)
> +void tpl_board_init(void)
> +{
> +	rk3399_force_power_on_reset();
> +}
> +# endif // !defined(CONFIG_TPL_BUILD)
> +#endif // defined(CONFIG_XPL_BUILD)
> 
> -- 
> 2.47.0
> 

-- 
Paul Kocialkowski,

Free software developer - https://www.paulk.fr/
Independent contractor - sys-base - https://www.sys-base.io/

Contributor to fully free software support for selected hardware.
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