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authorTan, Raymond <raymond.tan@intel.com>2014-09-03 10:41:38 +0800
committerWolfram Sang <wsa@the-dreams.de>2014-09-29 22:41:17 +0200
commit4bcfda09936da647b0a3b49d5dcb3c6c6ebb0395 (patch)
tree6a838ea3032bcfb468308597bab573952a88a692 /drivers/i2c
parent8e5f6b2a289c4374456fb785900b0b7445b719e6 (diff)
downloadop-kernel-dev-4bcfda09936da647b0a3b49d5dcb3c6c6ebb0395.zip
op-kernel-dev-4bcfda09936da647b0a3b49d5dcb3c6c6ebb0395.tar.gz
i2c: designware: add support of platform data to set I2C mode
Use the platform data to set the clk_freq when there is no DT configuration available. The clk_freq in turn will determine the I2C speed mode. In Quark, there is currently no other configuration mechanism other than board files. Signed-off-by: Raymond Tan <raymond.tan@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Hock Leong Kweh <hock.leong.kweh@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-designware-platdrv.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 8193e8e..4d6a6b9 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -41,6 +41,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/acpi.h>
+#include <linux/platform_data/i2c-designware.h>
#include "i2c-designware-core.h"
static struct i2c_algorithm i2c_dw_algo = {
@@ -122,6 +123,7 @@ static int dw_i2c_probe(struct platform_device *pdev)
struct dw_i2c_dev *dev;
struct i2c_adapter *adap;
struct resource *mem;
+ struct dw_i2c_platform_data *pdata;
int irq, r;
u32 clk_freq;
@@ -182,6 +184,10 @@ static int dw_i2c_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Only 100kHz and 400kHz supported");
return -EINVAL;
}
+ } else {
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata)
+ clk_freq = pdata->i2c_scl_freq;
}
dev->functionality =
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