i2c-eg20t: 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>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

2 files changed, 10 insertions, 7 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index cbe7a2fb779f..3101dd59e379 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -682,19 +682,19 @@ config I2C_XILINX
           will be called xilinx_i2c.
 
 config I2C_EG20T
-        tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223)"
+        tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) I2C"
         depends on PCI
         help
           This driver is for PCH(Platform controller Hub) I2C of EG20T which
           is an IOH(Input/Output Hub) for x86 embedded processor.
           This driver can access PCH I2C bus device.
 
-          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 IOH(Input/
+          Output Hub), ML7213, ML7223 and ML7831.
+          ML7213 IOH is for IVI(In-Vehicle Infotainment) use, ML7223 IOH is
+          for MP(Media Phone) use and 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.
 
 comment "External I2C/SMBus adapter drivers"
 
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 357a66c66064..c72d7f998487 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -137,6 +137,7 @@
 Set the number of I2C instance max
 Intel EG20T PCH :               1ch
 OKI SEMICONDUCTOR ML7213 IOH :  2ch
+OKI SEMICONDUCTOR ML7831 IOH :  1ch
 */
 #define PCH_I2C_MAX_DEV                 2
 
@@ -184,11 +185,13 @@ static DEFINE_MUTEX(pch_mutex);
 #define PCI_VENDOR_ID_ROHM              0x10DB
 #define PCI_DEVICE_ID_ML7213_I2C        0x802D
 #define PCI_DEVICE_ID_ML7223_I2C        0x8010
+#define PCI_DEVICE_ID_ML7831_I2C        0x8817
 
 static DEFINE_PCI_DEVICE_TABLE(pch_pcidev_id) = {
         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C),   1, },
         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
         { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_I2C), 1, },
+        { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_I2C), 1, },
         {0,}
 };