Merge tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Hans de Goede:

 - Microsoft Surface:
     - SSAM hot unplug support
     - Surface Pro 8 keyboard cover support
     - Tablet mode switch support for Surface Pro 8 and Surface Laptop
       Studio

 - thinkpad_acpi:
     - AMD Automatice Mode Transitions (AMT) support

 - Mellanox:
     - Vulcan chassis COMe NVSwitch management support
     - XH3000 support

 - New generic/shared Intel P2SB (Primary to Sideband) support

 - Lots of small cleanups

 - Various small bugfixes

 - Various new hardware ids / quirks additions

* tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (105 commits)
  platform/x86/intel/vsec: Fix wrong type for local status variables
  platform/x86: p2sb: Move out of X86_PLATFORM_DEVICES dependency
  platform/x86: pmc_atom: Fix comment typo
  platform/surface: gpe: Add support for 13" Intel version of Surface Laptop 4
  platform/olpc: Fix uninitialized data in debugfs write
  platform/mellanox: mlxreg-lc: Fix error flow and extend verbosity
  platform/x86: pmc_atom: Match all Lex BayTrail boards with critclk_systems DMI table
  platform/x86: sony-laptop: Remove useless comparisons in sony_pic_read_possible_resource()
  tools/power/x86/intel-speed-select: Remove unneeded semicolon
  tools/power/x86/intel-speed-select: Fix off by one check
  platform/surface: tabletsw: Fix __le32 integer access
  Documentation/ABI: Add new attributes for mlxreg-io sysfs interfaces
  Documentation/ABI: mlxreg-io: Fix contact info
  platform/mellanox: mlxreg-io: Add locking for io operations
  platform/x86: mlx-platform: Add COME board revision register
  platform/x86: mlx-platform: Add support for new system XH3000
  platform/x86: mlx-platform: Introduce support for COMe NVSwitch management module for Vulcan chassis
  platform/x86: mlx-platform: Add support for systems equipped with two ASICs
  platform/x86: mlx-platform: Add cosmetic changes for alignment
  platform/x86: mlx-platform: Make activation of some drivers conditional
  ...

2 files changed, 10 insertions, 30 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e95d6bc34070..7284206b278b 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -108,6 +108,7 @@ config I2C_HIX5HD2
 config I2C_I801
 	tristate "Intel 82801 (ICH/PCH)"
 	depends on PCI
+	select P2SB if X86
 	select CHECK_SIGNATURE if X86 && DMI
 	select I2C_SMBUS
 	help
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 9e5b87e107ba..81d0da2547bd 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -112,6 +112,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/itco_wdt.h>
+#include <linux/platform_data/x86/p2sb.h>
 #include <linux/pm_runtime.h>
 #include <linux/mutex.h>
 
@@ -141,7 +142,6 @@
 #define TCOBASE		0x050
 #define TCOCTL		0x054
 
-#define SBREG_BAR		0x10
 #define SBREG_SMBCTRL		0xc6000c
 #define SBREG_SMBCTRL_DNV	0xcf000c
 
@@ -1485,45 +1485,24 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev,
 		.version = 4,
 	};
 	struct resource *res;
-	unsigned int devfn;
-	u64 base64_addr;
-	u32 base_addr;
-	u8 hidden;
+	int ret;
 
 	/*
 	 * We must access the NO_REBOOT bit over the Primary to Sideband
-	 * bridge (P2SB). The BIOS prevents the P2SB device from being
-	 * enumerated by the PCI subsystem, so we need to unhide/hide it
-	 * to lookup the P2SB BAR.
+	 * (P2SB) bridge.
 	 */
-	pci_lock_rescan_remove();
-
-	devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1);
-
-	/* Unhide the P2SB device, if it is hidden */
-	pci_bus_read_config_byte(pci_dev->bus, devfn, 0xe1, &hidden);
-	if (hidden)
-		pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0);
-
-	pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr);
-	base64_addr = base_addr & 0xfffffff0;
-
-	pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr);
-	base64_addr |= (u64)base_addr << 32;
-
-	/* Hide the P2SB device, if it was hidden before */
-	if (hidden)
-		pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden);
-	pci_unlock_rescan_remove();
 
 	res = &tco_res[1];
+	ret = p2sb_bar(pci_dev->bus, 0, res);
+	if (ret)
+		return ERR_PTR(ret);
+
 	if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS)
-		res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL_DNV;
+		res->start += SBREG_SMBCTRL_DNV;
 	else
-		res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+		res->start += SBREG_SMBCTRL;
 
 	res->end = res->start + 3;
-	res->flags = IORESOURCE_MEM;
 
 	return platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1,
 					tco_res, 2, &pldata, sizeof(pldata));