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i2c: designware: move i2c_dw_plat_prepare_clk to common 

Move the i2c_dw_plat_prepare_clk funciton to common file in preparation
for its use also by the master driver.

Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Phil Reid 2017-11-02 10:40:25 +08:00 committed by Wolfram Sang
parent 3991c5c80b
commit a34a0b6da2
3 changed files with 14 additions and 12 deletions
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13
drivers/i2c/busses/i2c-designware-common.c
View File

@ -21,6 +21,7 @@
* ----------------------------------------------------------------------------
*
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/errno.h>
@ -185,6 +186,18 @@ unsigned long i2c_dw_clk_rate(struct dw_i2c_dev *dev)
return dev->get_clk_rate_khz(dev);
}
int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare)
{
if (IS_ERR(i_dev->clk))
return PTR_ERR(i_dev->clk);
if (prepare)
return clk_prepare_enable(i_dev->clk);
clk_disable_unprepare(i_dev->clk);
return 0;
}
int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
{
int ret;

1
drivers/i2c/busses/i2c-designware-core.h
View File

@ -301,6 +301,7 @@ u32 i2c_dw_scl_lcnt(u32 ic_clk, u32 tLOW, u32 tf, int offset);
void __i2c_dw_enable(struct dw_i2c_dev *dev, bool enable);
void __i2c_dw_enable_and_wait(struct dw_i2c_dev *dev, bool enable);
unsigned long i2c_dw_clk_rate(struct dw_i2c_dev *dev);
int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare);
int i2c_dw_acquire_lock(struct dw_i2c_dev *dev);
void i2c_dw_release_lock(struct dw_i2c_dev *dev);
int i2c_dw_wait_bus_not_busy(struct dw_i2c_dev *dev);

12
drivers/i2c/busses/i2c-designware-platdrv.c
View File

@ -203,18 +203,6 @@ static void i2c_dw_configure_slave(struct dw_i2c_dev *dev)
dev->mode = DW_IC_SLAVE;
}
static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare)
{
if (IS_ERR(i_dev->clk))
return PTR_ERR(i_dev->clk);
if (prepare)
return clk_prepare_enable(i_dev->clk);
clk_disable_unprepare(i_dev->clk);
return 0;
}
static void dw_i2c_set_fifo_size(struct dw_i2c_dev *dev, int id)
{
u32 param, tx_fifo_depth, rx_fifo_depth;