[linux-yocto] [linux-yocto-dev][PATCH] i2c: i801: fix DNV's SMBCTRL register offset

[Yongxin Liu]

From: Felipe Balbi <felipe.balbi at linux.intel.com>

commit 851a15114895c5bce163a6f2d57e0aa4658a1be4 upstream.

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 at vger.kernel.org> # v4.4+
Signed-off-by: Felipe Balbi <felipe.balbi at linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare at suse.de>
Signed-off-by: Wolfram Sang <wsa at the-dreams.de>
Signed-off-by: Yongxin Liu <yongxin.liu at windriver.com>
---
 drivers/i2c/busses/i2c-i801.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index aa726607645e..45fcf0c37a9e 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -139,6 +139,7 @@
 
 #define SBREG_BAR		0x10
 #define SBREG_SMBCTRL		0xc6000c
+#define SBREG_SMBCTRL_DNV	0xcf000c
 
 /* Host status bits for SMBPCISTS */
 #define SMBPCISTS_INTS		BIT(3)
@@ -1396,7 +1397,11 @@ 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;
 
-- 
2.14.4