These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 136 insertions, 6 deletions

diff --git a/kernel/drivers/i2c/busses/i2c-i801.c b/kernel/drivers/i2c/busses/i2c-i801.c
index 5ecbb3fdc..27fa0cb09 100644
--- a/kernel/drivers/i2c/busses/i2c-i801.c
+++ b/kernel/drivers/i2c/busses/i2c-i801.c
@@ -60,6 +60,10 @@
  * BayTrail (SOC)		0x0f12	32	hard	yes	yes	yes
  * Sunrise Point-H (PCH) 	0xa123  32	hard	yes	yes	yes
  * Sunrise Point-LP (PCH)	0x9d23	32	hard	yes	yes	yes
+ * DNV (SOC)			0x19df	32	hard	yes	yes	yes
+ * Broxton (SOC)		0x5ad4	32	hard	yes	yes	yes
+ * Lewisburg (PCH)		0xa1a3	32	hard	yes	yes	yes
+ * Lewisburg Supersku (PCH)	0xa223	32	hard	yes	yes	yes
  *
  * Features supported by this driver:
  * Software PEC				no
@@ -88,12 +92,13 @@
 #include <linux/slab.h>
 #include <linux/wait.h>
 #include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/itco_wdt.h>
 
 #if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \
 		defined CONFIG_DMI
 #include <linux/gpio.h>
 #include <linux/i2c-mux-gpio.h>
-#include <linux/platform_device.h>
 #endif
 
 /* I801 SMBus address offsets */
@@ -113,6 +118,16 @@
 #define SMBPCICTL	0x004
 #define SMBPCISTS	0x006
 #define SMBHSTCFG	0x040
+#define TCOBASE		0x050
+#define TCOCTL		0x054
+
+#define ACPIBASE		0x040
+#define ACPIBASE_SMI_OFF	0x030
+#define ACPICTRL		0x044
+#define ACPICTRL_EN		0x080
+
+#define SBREG_BAR		0x10
+#define SBREG_SMBCTRL		0xc6000c
 
 /* Host status bits for SMBPCISTS */
 #define SMBPCISTS_INTS		0x08
@@ -125,6 +140,9 @@
 #define SMBHSTCFG_SMB_SMI_EN	2
 #define SMBHSTCFG_I2C_EN	4
 
+/* TCO configuration bits for TCOCTL */
+#define TCOCTL_EN		0x0100
+
 /* Auxiliary control register bits, ICH4+ only */
 #define SMBAUXCTL_CRC		1
 #define SMBAUXCTL_E32B		2
@@ -188,6 +206,10 @@
 #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS	0x9ca2
 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS	0xa123
 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS	0x9d23
+#define PCI_DEVICE_ID_INTEL_DNV_SMBUS			0x19df
+#define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS		0x5ad4
+#define PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS		0xa1a3
+#define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS	0xa223
 
 struct i801_mux_config {
 	char *gpio_chip;
@@ -221,6 +243,7 @@ struct i801_priv {
 	const struct i801_mux_config *mux_drvdata;
 	struct platform_device *mux_pdev;
 #endif
+	struct platform_device *tco_pdev;
 };
 
 #define FEATURE_SMBUS_PEC	(1 << 0)
@@ -230,6 +253,7 @@ struct i801_priv {
 #define FEATURE_IRQ		(1 << 4)
 /* Not really a feature, but it's convenient to handle it as such */
 #define FEATURE_IDF		(1 << 15)
+#define FEATURE_TCO		(1 << 16)
 
 static const char *i801_feature_names[] = {
 	"SMBus PEC",
@@ -847,6 +871,10 @@ static const struct pci_device_id i801_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DNV_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROXTON_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS) },
 	{ 0, }
 };
 
@@ -1132,6 +1160,95 @@ static inline unsigned int i801_get_adapter_class(struct i801_priv *priv)
 }
 #endif
 
+static const struct itco_wdt_platform_data tco_platform_data = {
+	.name = "Intel PCH",
+	.version = 4,
+};
+
+static DEFINE_SPINLOCK(p2sb_spinlock);
+
+static void i801_add_tco(struct i801_priv *priv)
+{
+	struct pci_dev *pci_dev = priv->pci_dev;
+	struct resource tco_res[3], *res;
+	struct platform_device *pdev;
+	unsigned int devfn;
+	u32 tco_base, tco_ctl;
+	u32 base_addr, ctrl_val;
+	u64 base64_addr;
+
+	if (!(priv->features & FEATURE_TCO))
+		return;
+
+	pci_read_config_dword(pci_dev, TCOBASE, &tco_base);
+	pci_read_config_dword(pci_dev, TCOCTL, &tco_ctl);
+	if (!(tco_ctl & TCOCTL_EN))
+		return;
+
+	memset(tco_res, 0, sizeof(tco_res));
+
+	res = &tco_res[ICH_RES_IO_TCO];
+	res->start = tco_base & ~1;
+	res->end = res->start + 32 - 1;
+	res->flags = IORESOURCE_IO;
+
+	/*
+	 * Power Management registers.
+	 */
+	devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 2);
+	pci_bus_read_config_dword(pci_dev->bus, devfn, ACPIBASE, &base_addr);
+
+	res = &tco_res[ICH_RES_IO_SMI];
+	res->start = (base_addr & ~1) + ACPIBASE_SMI_OFF;
+	res->end = res->start + 3;
+	res->flags = IORESOURCE_IO;
+
+	/*
+	 * Enable the ACPI I/O space.
+	 */
+	pci_bus_read_config_dword(pci_dev->bus, devfn, ACPICTRL, &ctrl_val);
+	ctrl_val |= ACPICTRL_EN;
+	pci_bus_write_config_dword(pci_dev->bus, devfn, ACPICTRL, ctrl_val);
+
+	/*
+	 * 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.
+	 */
+	spin_lock(&p2sb_spinlock);
+
+	devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1);
+
+	/* Unhide the P2SB device */
+	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 */
+	pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x1);
+	spin_unlock(&p2sb_spinlock);
+
+	res = &tco_res[ICH_RES_MEM_OFF];
+	res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+	res->end = res->start + 3;
+	res->flags = IORESOURCE_MEM;
+
+	pdev = platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1,
+						 tco_res, 3, &tco_platform_data,
+						 sizeof(tco_platform_data));
+	if (IS_ERR(pdev)) {
+		dev_warn(&pci_dev->dev, "failed to create iTCO device\n");
+		return;
+	}
+
+	priv->tco_pdev = pdev;
+}
+
 static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	unsigned char temp;
@@ -1146,9 +1263,24 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	priv->adapter.owner = THIS_MODULE;
 	priv->adapter.class = i801_get_adapter_class(priv);
 	priv->adapter.algo = &smbus_algorithm;
+	priv->adapter.dev.parent = &dev->dev;
+	ACPI_COMPANION_SET(&priv->adapter.dev, ACPI_COMPANION(&dev->dev));
+	priv->adapter.retries = 3;
 
 	priv->pci_dev = dev;
 	switch (dev->device) {
+	case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS:
+	case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS:
+	case PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS:
+	case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS:
+	case PCI_DEVICE_ID_INTEL_DNV_SMBUS:
+		priv->features |= FEATURE_I2C_BLOCK_READ;
+		priv->features |= FEATURE_IRQ;
+		priv->features |= FEATURE_SMBUS_PEC;
+		priv->features |= FEATURE_BLOCK_BUFFER;
+		priv->features |= FEATURE_TCO;
+		break;
+
 	case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0:
 	case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1:
 	case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2:
@@ -1265,11 +1397,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	dev_info(&dev->dev, "SMBus using %s\n",
 		 priv->features & FEATURE_IRQ ? "PCI interrupt" : "polling");
 
-	/* set up the sysfs linkage to our parent device */
-	priv->adapter.dev.parent = &dev->dev;
-
-	/* Retry up to 3 times on lost arbitration */
-	priv->adapter.retries = 3;
+	i801_add_tco(priv);
 
 	snprintf(priv->adapter.name, sizeof(priv->adapter.name),
 		"SMBus I801 adapter at %04lx", priv->smba);
@@ -1296,6 +1424,8 @@ static void i801_remove(struct pci_dev *dev)
 	i2c_del_adapter(&priv->adapter);
 	pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg);
 
+	platform_device_unregister(priv->tco_pdev);
+
 	/*
 	 * do not call pci_disable_device(dev) since it can cause hard hangs on
 	 * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)