From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Sat, 8 Oct 2016 04:25:25 +0000 (+0900)
Subject: ARM: uniphier: add work-around for VBO noise problem
X-Git-Url: http://git.dujemihanovic.xyz/%22/img/sics.gif/%22/static/git-favicon.png?a=commitdiff_plain;h=baaafaaad3d53706e3d02aa4e0bba75f535ebd18;p=u-boot.git

ARM: uniphier: add work-around for VBO noise problem

Raise the VDD09 voltage line to 1.0V to suppress VBO noise.
This errata work-around code is needed only for ES1.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

diff --git a/arch/arm/mach-uniphier/board_init.c b/arch/arm/mach-uniphier/board_init.c
index b9be52f6cb..8c7864cb85 100644
--- a/arch/arm/mach-uniphier/board_init.c
+++ b/arch/arm/mach-uniphier/board_init.c
@@ -134,6 +134,13 @@ int board_init(void)
 #endif
 #if defined(CONFIG_ARCH_UNIPHIER_LD20)
 	case SOC_UNIPHIER_LD20:
+		/* ES1 errata: increase VDD09 supply to suppress VBO noise */
+		if (uniphier_get_soc_revision() == 1) {
+			writel(0x00000003, 0x6184e004);
+			writel(0x00000100, 0x6184e040);
+			writel(0x0000b500, 0x6184e024);
+			writel(0x00000001, 0x6184e000);
+		}
 		uniphier_nand_pin_init(false);
 		sg_set_pinsel(149, 14, 8, 4);	/* XIRQ0    -> XIRQ0 */
 		sg_set_iectrl(149);