linux-kernel - [PATCH 4.9 02/42] platform/x86: pmc_atom: Fix SLP

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Message-Id: <20220913140342.354720387@linuxfoundation.org>
Date:   Tue, 13 Sep 2022 16:07:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 02/42] platform/x86: pmc_atom: Fix SLP_TYPx bitfield mask

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

[ Upstream commit 0a90ed8d0cfa29735a221eba14d9cb6c735d35b6 ]

On Intel hardware the SLP_TYPx bitfield occupies bits 10-12 as per ACPI
specification (see Table 4.13 "PM1 Control Registers Fixed Hardware
Feature Control Bits" for the details).

Fix the mask and other related definitions accordingly.

Fixes: 93e5eadd1f6e ("x86/platform: New Intel Atom SOC power management controller driver")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Link: https://lore.kernel.org/r/20220801113734.36131-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/include/asm/pmc_atom.h   | 6 ++++--
 arch/x86/platform/atom/pmc_atom.c | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/pmc_atom.h b/arch/x86/include/asm/pmc_atom.h
index aa8744c77c6d9..b25ac6eb1fdee 100644
--- a/arch/x86/include/asm/pmc_atom.h
+++ b/arch/x86/include/asm/pmc_atom.h
@@ -16,6 +16,8 @@
 #ifndef PMC_ATOM_H
 #define PMC_ATOM_H
 
+#include <linux/bits.h>
+
 /* ValleyView Power Control Unit PCI Device ID */
 #define	PCI_DEVICE_ID_VLV_PMC	0x0F1C
 /* CherryTrail Power Control Unit PCI Device ID */
@@ -148,9 +150,9 @@
 #define	ACPI_MMIO_REG_LEN	0x100
 
 #define	PM1_CNT			0x4
-#define	SLEEP_TYPE_MASK		0xFFFFECFF
+#define	SLEEP_TYPE_MASK		GENMASK(12, 10)
 #define	SLEEP_TYPE_S5		0x1C00
-#define	SLEEP_ENABLE		0x2000
+#define	SLEEP_ENABLE		BIT(13)
 
 extern int pmc_atom_read(int offset, u32 *value);
 extern int pmc_atom_write(int offset, u32 value);
diff --git a/arch/x86/platform/atom/pmc_atom.c b/arch/x86/platform/atom/pmc_atom.c
index 964ff4fc61f9b..b5b371d959141 100644
--- a/arch/x86/platform/atom/pmc_atom.c
+++ b/arch/x86/platform/atom/pmc_atom.c
@@ -213,7 +213,7 @@ static void pmc_power_off(void)
 	pm1_cnt_port = acpi_base_addr + PM1_CNT;
 
 	pm1_cnt_value = inl(pm1_cnt_port);
-	pm1_cnt_value &= SLEEP_TYPE_MASK;
+	pm1_cnt_value &= ~SLEEP_TYPE_MASK;
 	pm1_cnt_value |= SLEEP_TYPE_S5;
 	pm1_cnt_value |= SLEEP_ENABLE;
 
-- 
2.35.1