mfd: Add tunnelcreek watchdog to lpc_sch devices

Tunnel Creek has an additional watchdog core.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/lpc_sch.c b/drivers/mfd/lpc_sch.c
index ea3f52c07ef7fd3436cee6a078f011961bdb92eb..ea1169b04779597cb4bf8964b26d7f861ba75afa 100644 (file)
--- a/drivers/mfd/lpc_sch.c
+++ b/drivers/mfd/lpc_sch.c
@@ -37,6 +37,9 @@
 #define GPIOBASE       0x44
 #define GPIO_IO_SIZE   64
 
+#define WDTBASE                0x84
+#define WDT_IO_SIZE    64
+
 static struct resource smbus_sch_resource = {
                .flags = IORESOURCE_IO,
 };
@@ -59,6 +62,18 @@ static struct mfd_cell lpc_sch_cells[] = {
        },
 };
 
+static struct resource wdt_sch_resource = {
+               .flags = IORESOURCE_IO,
+};
+
+static struct mfd_cell tunnelcreek_cells[] = {
+       {
+               .name = "tunnelcreek_wdt",
+               .num_resources = 1,
+               .resources = &wdt_sch_resource,
+       },
+};
+
 static struct pci_device_id lpc_sch_ids[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
@@ -72,6 +87,7 @@ static int __devinit lpc_sch_probe(struct pci_dev *dev,
        unsigned int base_addr_cfg;
        unsigned short base_addr;
        int i;
+       int ret;
 
        pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
        if (!(base_addr_cfg & (1 << 31))) {
@@ -104,8 +120,39 @@ static int __devinit lpc_sch_probe(struct pci_dev *dev,
        for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
                lpc_sch_cells[i].id = id->device;
 
-       return mfd_add_devices(&dev->dev, 0,
+       ret = mfd_add_devices(&dev->dev, 0,
                        lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
+       if (ret)
+               goto out_dev;
+
+       if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC) {
+               pci_read_config_dword(dev, WDTBASE, &base_addr_cfg);
+               if (!(base_addr_cfg & (1 << 31))) {
+                       dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n");
+                       ret = -ENODEV;
+                       goto out_dev;
+               }
+               base_addr = (unsigned short)base_addr_cfg;
+               if (base_addr == 0) {
+                       dev_err(&dev->dev, "I/O space for WDT uninitialized\n");
+                       ret = -ENODEV;
+                       goto out_dev;
+               }
+
+               wdt_sch_resource.start = base_addr;
+               wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1;
+
+               for (i = 0; i < ARRAY_SIZE(tunnelcreek_cells); i++)
+                       tunnelcreek_cells[i].id = id->device;
+
+               ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells,
+                       ARRAY_SIZE(tunnelcreek_cells), NULL, 0);
+       }
+
+       return ret;
+out_dev:
+       mfd_remove_devices(&dev->dev);
+       return ret;
 }
 
 static void __devexit lpc_sch_remove(struct pci_dev *dev)