pch_phub: Support new device LAPIS Semiconductor ML7831 IOH

ML7831 is companion chip for Intel Atom E6xx series.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 28 insertions, 7 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index d593878d66d0..5664696f2d3a 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -472,7 +472,7 @@ config BMP085
           module will be called bmp085.
 
 config PCH_PHUB
-        tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223) PHUB"
+        tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) PHUB"
         depends on PCI
         help
           This driver is for PCH(Platform controller Hub) PHUB(Packet Hub) of
@@ -480,12 +480,13 @@ config PCH_PHUB
           processor. The Topcliff has MAC address and Option ROM data in SROM.
           This driver can access MAC address and Option ROM data in SROM.
 
-          This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
-          Output Hub), ML7213 and ML7223.
-          ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
-          for MP(Media Phone) use.
-          ML7213/ML7223 is companion chip for Intel Atom E6xx series.
-          ML7213/ML7223 is completely compatible for Intel EG20T PCH.
+          This driver also can be used for LAPIS Semiconductor's IOH,
+          ML7213/ML7223/ML7831.
+          ML7213 which is for IVI(In-Vehicle Infotainment) use.
+          ML7223 IOH is for MP(Media Phone) use.
+          ML7831 IOH is for general purpose use.
+          ML7213/ML7223/ML7831 is companion chip for Intel Atom E6xx series.
+          ML7213/ML7223/ML7831 is completely compatible for Intel EG20T PCH.
 
           To compile this driver as a module, choose M here: the module will
           be called pch_phub.
diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c
index dee33addcaeb..b50f48af49dd 100644
--- a/drivers/misc/pch_phub.c
+++ b/drivers/misc/pch_phub.c
@@ -73,6 +73,9 @@
 #define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */
 #define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */
 
+/* Macros for ML7831 */
+#define PCI_DEVICE_ID_ROHM_ML7831_PHUB 0x8801
+
 /* SROM ACCESS Macro */
 #define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
 
@@ -763,6 +766,22 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev,
                 chip->pch_opt_rom_start_address =\
                                                  PCH_PHUB_ROM_START_ADDR_ML7223;
                 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
+        } else if (id->driver_data == 5) { /* ML7831 */
+                retval = sysfs_create_file(&pdev->dev.kobj,
+                                           &dev_attr_pch_mac.attr);
+                if (retval)
+                        goto err_sysfs_create;
+
+                retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
+                if (retval)
+                        goto exit_bin_attr;
+
+                /* set the prefech value */
+                iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
+                /* set the interrupt delay value */
+                iowrite32(0x25, chip->pch_phub_base_address + 0x44);
+                chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
+                chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
         }
 
         chip->ioh_type = id->driver_data;
@@ -847,6 +866,7 @@ static struct pci_device_id pch_phub_pcidev_id[] = {
         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2,  },
         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3,  },
         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4,  },
+        { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7831_PHUB), 5,  },
         { }
 };
 MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id);