[PATCH v4 4/5] platform/x86/amd: pmc: use FCH_PM_BASE definition

[Mario Limonciello <superm1@kernel.org>]

From: Mario Limonciello <mario.limonciello@amd.com>

The s2idle mmio quirk uses a scratch register in the FCH.
Adjust the code to clarify that.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v4:
 * Use fch.h instead
---
 arch/x86/include/asm/amd/fch.h            | 1 +
 drivers/platform/x86/amd/pmc/pmc-quirks.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/amd/fch.h b/arch/x86/include/asm/amd/fch.h
index a5fd91ff92df3..9b32e8a03193e 100644
--- a/arch/x86/include/asm/amd/fch.h
+++ b/arch/x86/include/asm/amd/fch.h
@@ -8,5 +8,6 @@
 /* register offsets from PM base */
 #define FCH_PM_DECODEEN			0x00
 #define FCH_PM_DECODEEN_SMBUS0SEL	GENMASK(20, 19)
+#define FCH_PM_SCRATCH			0x80
 
 #endif
diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index b4f49720c87f6..3c680d2029f62 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -8,6 +8,7 @@
  * Author: Mario Limonciello <mario.limonciello@amd.com>
  */
 
+#include <asm/amd/fch.h>
 #include <linux/dmi.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
@@ -20,7 +21,7 @@ struct quirk_entry {
 };
 
 static struct quirk_entry quirk_s2idle_bug = {
-	.s2idle_bug_mmio = 0xfed80380,
+	.s2idle_bug_mmio = FCH_PM_BASE + FCH_PM_SCRATCH,
 };
 
 static struct quirk_entry quirk_spurious_8042 = {
-- 
2.43.0