From 3ff11aaa507aa222e76aa2517efc9786494994ed Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Fri, 17 Jun 2016 02:13:17 -0700 Subject: [PATCH] x86: baytrail: acpi: Hide internal UART per GNVS setting If global NVS says internal UART is not enabled, hide it in the ASL code so that OS won't see it. Signed-off-by: Bin Meng Reviewed-by: George McCollister Tested-by: George McCollister Reviewed-by: Simon Glass --- .../include/asm/arch-baytrail/acpi/lpc.asl | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl b/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl index 22f0d68f4d..fe34d3271c 100644 --- a/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl +++ b/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl @@ -119,17 +119,14 @@ Device (LPCB) Method(_STA, 0, Serialized) { - /* - * TODO: - * - * Need to hide the internal UART depending on whether - * internal UART is enabled or not so that external - * SuperIO UART can be exposed to system. - */ - Store(1, UI3E) - Store(1, UI4E) - Store(1, C1EN) - Return (STA_VISIBLE) + If (LEqual(IURE, 1)) { + Store(1, UI3E) + Store(1, UI4E) + Store(1, C1EN) + Return (STA_VISIBLE) + } Else { + Return (STA_MISSING) + } }