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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>
This commit is contained in:
Masahiro Yamada 2016-10-08 13:25:25 +09:00
parent c89638a027
commit baaafaaad3
1 changed files with 7 additions and 0 deletions
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7
arch/arm/mach-uniphier/board_init.c
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@ -134,6 +134,13 @@ int board_init(void)
#endif #endif
#if defined(CONFIG_ARCH_UNIPHIER_LD20) #if defined(CONFIG_ARCH_UNIPHIER_LD20)
case SOC_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); uniphier_nand_pin_init(false);
sg_set_pinsel(149, 14, 8, 4); /* XIRQ0 -> XIRQ0 */ sg_set_pinsel(149, 14, 8, 4); /* XIRQ0 -> XIRQ0 */
sg_set_iectrl(149); sg_set_iectrl(149);