i2c-designware: move i2c functionality bit field to be adapter specific

The functionality of the adapter depends on the configuration of the
IP block at silicon compile time and is adapter specific.

Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

3 files changed, 11 insertions, 6 deletions

diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index cd52f17028cd..71055114bd80 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -457,12 +457,8 @@ done:
 
 u32 i2c_dw_func(struct i2c_adapter *adap)
 {
-        return  I2C_FUNC_I2C |
-                I2C_FUNC_10BIT_ADDR |
-                I2C_FUNC_SMBUS_BYTE |
-                I2C_FUNC_SMBUS_BYTE_DATA |
-                I2C_FUNC_SMBUS_WORD_DATA |
-                I2C_FUNC_SMBUS_I2C_BLOCK;
+        struct dw_i2c_dev *dev = i2c_get_adapdata(adap);
+        return dev->functionality;
 }
 
 static u32 i2c_dw_read_clear_intrbits(struct dw_i2c_dev *dev)
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 43de340af57f..ab4e655a6c61 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -182,6 +182,7 @@ struct dw_i2c_dev {
         int                     irq;
         int                     swab;
         struct i2c_adapter      adapter;
+        u32                     functionality;
         unsigned int            tx_fifo_depth;
         unsigned int            rx_fifo_depth;
 };
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 08783a6ff1a2..36db7a80cbb2 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -96,6 +96,14 @@ static int __devinit dw_i2c_probe(struct platform_device *pdev)
         }
         clk_enable(dev->clk);
 
+        dev->functionality =
+                I2C_FUNC_I2C |
+                I2C_FUNC_10BIT_ADDR |
+                I2C_FUNC_SMBUS_BYTE |
+                I2C_FUNC_SMBUS_BYTE_DATA |
+                I2C_FUNC_SMBUS_WORD_DATA |
+                I2C_FUNC_SMBUS_I2C_BLOCK;
+
         dev->base = ioremap(mem->start, resource_size(mem));
         if (dev->base == NULL) {
                 dev_err(&pdev->dev, "failure mapping io resources\n");