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>

diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 5a1d37d..d917dd1 100644 (file)
--- 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:

diff --git a/include/linux/i2c/i2c-sh_mobile.h b/include/linux/i2c/i2c-sh_mobile.h
new file mode 100644 (file)
index 0000000..beda708
--- /dev/null
+++ b/include/linux/i2c/i2c-sh_mobile.h
@@ -0,0 +1,10 @@
+#ifndef __I2C_SH_MOBILE_H__
+#define __I2C_SH_MOBILE_H__
+
+#include <linux/platform_device.h>
+
+struct i2c_sh_mobile_platform_data {
+       unsigned long bus_speed;
+};
+
+#endif /* __I2C_SH_MOBILE_H__ */