diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-i801.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index c9536e17d6ff..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) }, @@ -1332,6 +1335,7 @@ static void i801_add_tco(struct i801_priv *priv) u32 tco_base, tco_ctl; u32 base_addr, ctrl_val; u64 base64_addr; + u8 hidden; if (!(priv->features & FEATURE_TCO)) return; @@ -1376,8 +1380,10 @@ static void i801_add_tco(struct i801_priv *priv) devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1); - /* Unhide the P2SB device */ - pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0); + /* Unhide the P2SB device, if it is hidden */ + pci_bus_read_config_byte(pci_dev->bus, devfn, 0xe1, &hidden); + if (hidden) + pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0); pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr); base64_addr = base_addr & 0xfffffff0; @@ -1385,8 +1391,9 @@ static void i801_add_tco(struct i801_priv *priv) pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr); base64_addr |= (u64)base_addr << 32; - /* Hide the P2SB device */ - pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x1); + /* Hide the P2SB device, if it was hidden before */ + if (hidden) + pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden); spin_unlock(&p2sb_spinlock); res = &tco_res[ICH_RES_MEM_OFF]; @@ -1509,6 +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; |