3 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/i2c/busses/i2c-i801 b/Documentation/i2c/busses/i2c-i801
index 0500193434cb..d47702456926 100644
--- a/Documentation/i2c/busses/i2c-i801
+++ b/Documentation/i2c/busses/i2c-i801
@@ -36,6 +36,7 @@ Supported adapters:
   * Intel Gemini Lake (SOC)
   * Intel Cannon Lake-H (PCH)
   * Intel Cannon Lake-LP (PCH)
+  * Intel Cedar Fork (PCH)
    Datasheets: Publicly available at the Intel website
 
 On Intel Patsburg and later chipsets, both the normal host SMBus controller
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index c06dce2c1da7..45a3f3ca29b3 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -131,6 +131,7 @@ config I2C_I801
             Gemini Lake (SOC)
             Cannon Lake-H (PCH)
             Cannon Lake-LP (PCH)
+            Cedar Fork (PCH)
 
           This driver can also be built as a module.  If so, the module
           will be called i2c-i801.
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index e114e4e00d29..9e12a53ef7b8 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -68,6 +68,7 @@
  * Gemini Lake (SOC)            0x31d4  32      hard    yes     yes     yes
  * Cannon Lake-H (PCH)          0xa323  32      hard    yes     yes     yes
  * Cannon Lake-LP (PCH)         0x9da3  32      hard    yes     yes     yes
+ * Cedar Fork (PCH)             0x18df  32      hard    yes     yes     yes
  *
  * Features supported by this driver:
  * Software PEC                         no
@@ -204,6 +205,7 @@
 
 /* Older devices have their ID defined in <linux/pci_ids.h> */
 #define PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS              0x0f12
+#define PCI_DEVICE_ID_INTEL_CDF_SMBUS                   0x18df
 #define PCI_DEVICE_ID_INTEL_DNV_SMBUS                   0x19df
 #define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS           0x1c22
 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS              0x1d22
@@ -1025,6 +1027,7 @@ static const struct pci_device_id i801_ids[] = {
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS) },
+        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CDF_SMBUS) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DNV_SMBUS) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROXTON_SMBUS) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS) },
@@ -1513,6 +1516,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
         case PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS:
         case PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS:
         case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS:
+        case PCI_DEVICE_ID_INTEL_CDF_SMBUS:
         case PCI_DEVICE_ID_INTEL_DNV_SMBUS:
         case PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS:
                 priv->features |= FEATURE_I2C_BLOCK_READ;