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
--- 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 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 @@
* 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_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 @@
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 @@
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
index 0000000..beda7081
--- /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__ */