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>
This commit is contained in:
parent
8e5f6b2a28
commit
4bcfda0993
|
@ -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 =
|
||||
|
|
21
include/linux/platform_data/i2c-designware.h
Normal file
21
include/linux/platform_data/i2c-designware.h
Normal file
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
* Copyright(c) 2014 Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*/
|
||||
|
||||
#ifndef I2C_DESIGNWARE_H
|
||||
#define I2C_DESIGNWARE_H
|
||||
|
||||
struct dw_i2c_platform_data {
|
||||
unsigned int i2c_scl_freq;
|
||||
};
|
||||
|
||||
#endif
|
Loading…
Reference in a new issue