i2c: designware-pci: add 10-bit addressing mode functionality for BYT I2C

All the I2C controllers on Intel BayTrail LPSS subsystem able
to support 10-bit addressing mode functionality.

Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Signed-off-by: Ong, Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 80c3b5e0a5c8..094509bcc089 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -64,12 +64,19 @@ struct dw_pci_controller {
         u32 tx_fifo_depth;
         u32 rx_fifo_depth;
         u32 clk_khz;
+        u32 functionality;
 };
 
 #define INTEL_MID_STD_CFG  (DW_IC_CON_MASTER |                  \
                                 DW_IC_CON_SLAVE_DISABLE |       \
                                 DW_IC_CON_RESTART_EN)
 
+#define DW_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C |                        \
+                                        I2C_FUNC_SMBUS_BYTE |           \
+                                        I2C_FUNC_SMBUS_BYTE_DATA |      \
+                                        I2C_FUNC_SMBUS_WORD_DATA |      \
+                                        I2C_FUNC_SMBUS_I2C_BLOCK)
+
 static struct  dw_pci_controller  dw_pci_controllers[] = {
         [moorestown_0] = {
                 .bus_num     = 0,
@@ -140,6 +147,7 @@ static struct  dw_pci_controller  dw_pci_controllers[] = {
                 .tx_fifo_depth = 32,
                 .rx_fifo_depth = 32,
                 .clk_khz = 100000,
+                .functionality = I2C_FUNC_10BIT_ADDR,
         },
 };
 static struct i2c_algorithm i2c_dw_algo = {
@@ -212,12 +220,9 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
         dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
         dev->base = pcim_iomap_table(pdev)[0];
         dev->dev = &pdev->dev;
-        dev->functionality =
-                I2C_FUNC_I2C |
-                I2C_FUNC_SMBUS_BYTE |
-                I2C_FUNC_SMBUS_BYTE_DATA |
-                I2C_FUNC_SMBUS_WORD_DATA |
-                I2C_FUNC_SMBUS_I2C_BLOCK;
+        dev->functionality = controller->functionality |
+                                DW_DEFAULT_FUNCTIONALITY;
+
         dev->master_cfg =  controller->bus_cfg;
 
         pci_set_drvdata(pdev, dev);