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i2c: designware: add support of platform data to set I2C mode

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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:
Tan, Raymond 2014-09-03 10:41:38 +08:00 • committed by Wolfram Sang
parent 8e5f6b2a28
commit 4bcfda0993
2 changed files with 27 additions and 0 deletions
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21
include/linux/platform_data/i2c-designware.h Normal file
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/*
* 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