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clk: add API to enable clock 

The most basic thing for clock is to enable it, but it is missing
in this uclass.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
utp
Masahiro Yamada 2016-01-13 13:16:12 +09:00 committed by Simon Glass
parent 9e52126f34
commit f0e075162f
2 changed files with 28 additions and 0 deletions
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10
drivers/clk/clk-uclass.c
View File

@ -32,6 +32,16 @@ ulong clk_set_rate(struct udevice *dev, ulong rate)
return ops->set_rate(dev, rate);
}
int clk_enable(struct udevice *dev, int periph)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->enable)
return -ENOSYS;
return ops->enable(dev, periph);
}
ulong clk_get_periph_rate(struct udevice *dev, int periph)
{
struct clk_ops *ops = clk_get_ops(dev);

18
include/clk.h
View File

@ -32,6 +32,15 @@ struct clk_ops {
*/
ulong (*set_rate)(struct udevice *dev, ulong rate);
/**
* enable() - Enable the clock for a peripheral
*
* @dev: clock provider
* @periph: Peripheral ID to enable
* @return zero on success, or -ve error code
*/
int (*enable)(struct udevice *dev, int periph);
/**
* get_periph_rate() - Get clock rate for a peripheral
*
@ -70,6 +79,15 @@ ulong clk_get_rate(struct udevice *dev);
*/
ulong clk_set_rate(struct udevice *dev, ulong rate);
/**
* clk_enable() - Enable the clock for a peripheral
*
* @dev: clock provider
* @periph: Peripheral ID to enable
* @return zero on success, or -ve error code
*/
int clk_enable(struct udevice *dev, int periph);
/**
* clk_get_periph_rate() - Get current clock rate for a peripheral
*