i2c: i801: fix DNV's SMBCTRL register offset

DNV's iTCO is slightly different with SMBCTRL sitting at a different
offset when compared to all other devices. Let's fix so that we can
properly use iTCO watchdog.

Fixes: 84d7f2ebd70d ("i2c: i801: Add support for Intel DNV")
Cc: <stable@vger.kernel.org> # v4.4+
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 04b60a349d7e..c91e145ef5a5 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -140,6 +140,7 @@
 
 #define SBREG_BAR               0x10
 #define SBREG_SMBCTRL           0xc6000c
+#define SBREG_SMBCTRL_DNV       0xcf000c
 
 /* Host status bits for SMBPCISTS */
 #define SMBPCISTS_INTS          BIT(3)
@@ -1399,7 +1400,11 @@ static void i801_add_tco(struct i801_priv *priv)
         spin_unlock(&p2sb_spinlock);
 
         res = &tco_res[ICH_RES_MEM_OFF];
-        res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+        if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS)
+                res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL_DNV;
+        else
+                res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+
         res->end = res->start + 3;
         res->flags = IORESOURCE_MEM;