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authorAlexander Stein <alexander.stein@systec-electronic.com>2011-06-16 13:05:49 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2011-07-31 23:28:23 +0200
commit19921ef61217fff600202b819c05bb078f254619 (patch)
tree5e06f6ef8dbcf6f58ba63fc765f93cda7c2980e8 /drivers/mfd/lpc_sch.c
parent0a1b089738cf2165ee8678e2483fce3c40389d4a (diff)
downloadlinux-19921ef61217fff600202b819c05bb078f254619.tar.gz
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>
Diffstat (limited to 'drivers/mfd/lpc_sch.c')
-rw-r--r--drivers/mfd/lpc_sch.c49
1 files changed, 48 insertions, 1 deletions
diff --git a/drivers/mfd/lpc_sch.c b/drivers/mfd/lpc_sch.c
index ea3f52c07ef..ea1169b0477 100644
--- 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)