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authorMika Westerberg <mika.westerberg@linux.intel.com>2016-09-20 15:30:53 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-09-28 23:08:08 +0200
commit1f6dbb022bd477239bfbb52ef868f694b5f1d36a (patch)
treebc6f873c56139ad05be12314fb87659ae5a171ea /drivers/i2c/busses/i2c-i801.c
parent3413f702fae096184ad8bd9be9d7ecbc7c182bd7 (diff)
downloadlinux-stericsson-1f6dbb022bd477239bfbb52ef868f694b5f1d36a.tar.gz
i2c: i801: Do not create iTCO watchdog when WDAT table exists
ACPI WDAT table is the preferred way to use hardware watchdog over the native iTCO_wdt. Windows only uses this table for its hardware watchdog implementation so we should be relatively safe to trust it has been validated by OEMs Prevent iTCO watchdog creation if we detect that there is ACPI WDAT table. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/i2c/busses/i2c-i801.c')
-rw-r--r--drivers/i2c/busses/i2c-i801.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 5ef9b733d153..26298af73232 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1486,7 +1486,9 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
priv->features |= FEATURE_IRQ;
priv->features |= FEATURE_SMBUS_PEC;
priv->features |= FEATURE_BLOCK_BUFFER;
- priv->features |= FEATURE_TCO;
+ /* If we have ACPI based watchdog use that instead */
+ if (!acpi_has_watchdog())
+ priv->features |= FEATURE_TCO;
priv->features |= FEATURE_HOST_NOTIFY;
break;