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x86: baytrail: acpi: Hide internal UART per GNVS setting

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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 <bmeng.cn@gmail.com>
Reviewed-by: George McCollister <george.mccollister@gmail.com>
Tested-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2016-06-17 02:13:17 -07:00
parent 79c2c257cf
commit 3ff11aaa50
1 changed files with 8 additions and 11 deletions
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19
arch/x86/include/asm/arch-baytrail/acpi/lpc.asl
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@ -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)
}
}