I am not exactly sure if this is the way to send the patch for u-boot. But
I am trying to update a patch for
https://github.com/openbmc/u-boot/tree/v2016.07-aspeed-openbmc.

It just gives the options to have the u-boot enable the SGPIO registers for
SCU.

Please take a look.

Best,

Willy Tu

On Wed, Mar 31, 2021 at 2:31 PM Willy Tu <wltu@google.com> wrote:

> From a2d7336bb59df8f2ef622d4369fc035b2aafd74c Mon Sep 17 00:00:00 2001
> From: Willy Tu <wltu@google.com>
> Date: Mon, 22 Mar 2021 17:01:56 -0700
> Subject: [PATCH] board: aspeed: Enable SGPIO in SCU
>
> Add option to enable register for SGPIO in SCU
>
> Signed-off-by: Willy Tu <wltu@google.com>
> ---
>  board/aspeed/ast-g4/Kconfig  |  4 ++++
>  board/aspeed/ast-g4/ast-g4.c | 13 +++++++++++++
>  2 files changed, 17 insertions(+)
>
> diff --git a/board/aspeed/ast-g4/Kconfig b/board/aspeed/ast-g4/Kconfig
> index 2bec9a733a..e78030ae34 100644
> --- a/board/aspeed/ast-g4/Kconfig
> +++ b/board/aspeed/ast-g4/Kconfig
> @@ -19,4 +19,8 @@ config SYS_CONFIG_NAME
>   default "ast-g4-phy" if ASPEED_NET_PHY
>   default "ast-g4-ncsi" if ASPEED_NET_NCSI
>
> +config ENABLE_SGPIO
> +    tristate "Enable SGPIO in SCU"
> + default n
> +
>  endif
> diff --git a/board/aspeed/ast-g4/ast-g4.c b/board/aspeed/ast-g4/ast-g4.c
> index 656495307b..e2463d4524 100644
> --- a/board/aspeed/ast-g4/ast-g4.c
> +++ b/board/aspeed/ast-g4/ast-g4.c
> @@ -22,6 +22,19 @@ int board_init(void)
>   /* address of boot parameters */
>   gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
>   gd->flags = 0;
> +
> +#ifdef CONFIG_ENABLE_SGPIO
> + /* Unlock SCU */
> + writel(SCU_PROTECT_UNLOCK, AST_SCU_BASE);
> +
> + /* Enable SGPIO Master */
> + u32 reg = readl(AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL2);
> + reg |= (SCU_FUN_PIN_SGPMI |
> + SCU_FUN_PIN_SGPMO |
> + SCU_FUN_PIN_SGPMLD |
> + SCU_FUN_PIN_SGPMCK);
> + writel(reg, AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL2);
> +#endif
>   return 0;
>  }
>
> --
> 2.31.0.208.g409f899ff0-goog
>
>