i2c: i2c-sh_mobile bus speed platform data V2

Add support to the i2c-sh_mobile driver for setting
the I2C bus speed using platform data.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 5a1d37d0b62f..d917dd1cc091 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -32,6 +32,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/i2c/i2c-sh_mobile.h>
 
 /* Transmit operation:                                                      */
 /*                                                                          */
@@ -117,7 +118,7 @@ struct sh_mobile_i2c_data {
         struct device *dev;
         void __iomem *reg;
         struct i2c_adapter adap;
-
+        unsigned long bus_speed;
         struct clk *clk;
         u_int8_t icic;
         u_int8_t iccl;
@@ -205,7 +206,7 @@ static void activate_ch(struct sh_mobile_i2c_data *pd)
          * We also round off the result.
          */
         num = i2c_clk * 5;
-        denom = NORMAL_SPEED * 9;
+        denom = pd->bus_speed * 9;
         tmp = num * 10 / denom;
         if (tmp % 10 >= 5)
                 pd->iccl = (u_int8_t)((num/denom) + 1);
@@ -574,6 +575,7 @@ static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, int hook)
 
 static int sh_mobile_i2c_probe(struct platform_device *dev)
 {
+        struct i2c_sh_mobile_platform_data *pdata = dev->dev.platform_data;
         struct sh_mobile_i2c_data *pd;
         struct i2c_adapter *adap;
         struct resource *res;
@@ -618,6 +620,11 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
                 goto err_irq;
         }
 
+        /* Use platformd data bus speed or NORMAL_SPEED */
+        pd->bus_speed = NORMAL_SPEED;
+        if (pdata && pdata->bus_speed)
+                pd->bus_speed = pdata->bus_speed;
+
         /* The IIC blocks on SH-Mobile ARM processors
          * come with two new bits in ICIC.
          */
@@ -658,6 +665,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
                 goto err_all;
         }
 
+        dev_info(&dev->dev, "I2C adapter %d with bus speed %lu Hz\n",
+                 adap->nr, pd->bus_speed);
         return 0;
 
  err_all: