On 12/06/12 21:56, Kevin O'Connor wrote:
> On Thu, Dec 06, 2012 at 06:10:46PM +0100, Alexander Graf wrote:
>> You should be able to poke fw_cfg in the _STA method. The machine
>> file could search its bus on init (or on machine create notify) and
>> populate a fw_cfg variable to indicate whether it found an applesmc.
>
> I don't think we should access fw_cfg from the AML code. AML code is
> already too fragile and I think accessing fw_cfg is just going to make
> it worse.
One can poke at the applesmc directly for detection ...
cheers,
Gerd
>From baad5d90adae3d5de32bbf743996d4adb1e1ba18 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kra...@redhat.com>
Date: Fri, 7 Dec 2012 10:21:44 +0100
Subject: [PATCH] acpi: add apple smc device
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
src/acpi-dsdt-isa.dsl | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/src/acpi-dsdt-isa.dsl b/src/acpi-dsdt-isa.dsl
index 70e1e48..135c893 100644
--- a/src/acpi-dsdt-isa.dsl
+++ b/src/acpi-dsdt-isa.dsl
@@ -1,6 +1,28 @@
/* Common legacy ISA style devices. */
Scope(\_SB.PCI0.ISA) {
+ Device (SMC) {
+ Name(_HID, EisaId("APP0001"))
+ OperationRegion(SMC, SystemIO, 0x0300, 0x20)
+ Field(SMC, ByteAcc, NoLock, Preserve) {
+ Offset(0x04),
+ CMDP, 8,
+ }
+ Method(_STA, 0) {
+ Store(0x10, CMDP) // APPLESMC_READ_CMD
+ Store(CMDP, Local0)
+ If (LEqual(Local0, 0x0c)) {
+ Return (0x0F)
+ } Else {
+ Return (0x00)
+ }
+ }
+ Name (_CRS, ResourceTemplate () {
+ IO (Decode16, 0x0300, 0x0300, 0x01, 0x20)
+ IRQNoFlags() { 6 }
+ })
+ }
+
Device(RTC) {
Name(_HID, EisaId("PNP0B00"))
Name(RESI, ResourceTemplate() {
--
1.7.1
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