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authorMagnus Damm <damm@opensource.se>2011-04-28 13:25:36 +0900
committerBen Dooks <ben-linux@fluff.org>2011-05-11 07:08:13 +0100
commit81f8115305f821335cf9e16110bf0806f7b93283 (patch)
tree99353fbf61b57769b52cadb47c30ae6f3fb88479 /drivers/i2c
parent1082d5d29d9a71f43b969b89ce613374602a6946 (diff)
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-sh_mobile.c13
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 5a1d37d0b62..d917dd1cc09 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: