[PATCH u-boot v2016.07-aspeed-openbmc] board: aspeed: Enable SGPIO in SCU

[Willy Tu <wltu@google.com>]

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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

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