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i2c: designware: fix building driver as module 

The designware core and platform are built as separate modules.
Export i2c_dw_prepare_clk() so it can be used by the platform
driver.

Fixes: a34a0b6da2 ("i2c: designware: move i2c_dw_plat_prepare_clk to common")
Signed-off-by: Phil Reid <preid@electromag.com.au>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Phil Reid 2017-11-28 11:09:11 +08:00 committed by Wolfram Sang
parent 10c9ef045a
commit 4d67c2e7f6
1 changed files with 1 additions and 0 deletions
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drivers/i2c/busses/i2c-designware-common.c
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@ -197,6 +197,7 @@ int i2c_dw_prepare_clk(struct dw_i2c_dev *dev, bool prepare)
clk_disable_unprepare(dev->clk);
return 0;
}
EXPORT_SYMBOL_GPL(i2c_dw_prepare_clk);
int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
{