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clk: add clk_release_all()

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Add clk_release_all() method which Disable/Free an
array of clocks that has been previously requested by
clk_request/get_by_*()

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Patrice Chotard 2017-07-18 11:57:07 +02:00 committed by Marek Vasut
parent 3b9d1bdd4e
commit 82a8a669b4
2 changed files with 40 additions and 0 deletions
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26
drivers/clk/clk-uclass.c
View File

@ -65,6 +65,8 @@ int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
assert(clk);
clk->dev = NULL;
ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
index, &args);
if (ret) {
@ -102,6 +104,7 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
int index;
debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
clk->dev = NULL;
index = dev_read_stringlist_search(dev, "clock-names", name);
if (index < 0) {
@ -187,6 +190,29 @@ int clk_disable(struct clk *clk)
return ops->disable(clk);
}
int clk_release_all(struct clk *clk, int count)
{
int i, ret;
for (i = 0; i < count; i++) {
debug("%s(clk[%d]=%p)\n", __func__, i, &clk[i]);
/* check if clock has been previously requested */
if (!clk[i].dev)
continue;
ret = clk_disable(&clk[i]);
if (ret && ret != -ENOSYS)
return ret;
ret = clk_free(&clk[i]);
if (ret && ret != -ENOSYS)
return ret;
}
return 0;
}
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",

14
include/clk.h
View File

@ -174,6 +174,20 @@ int clk_enable(struct clk *clk);
*/
int clk_disable(struct clk *clk);
/**
* clk_release_all() - Disable (turn off)/Free an array of previously
* requested clocks.
*
* For each clock contained in the clock array, this function will check if
* clock has been previously requested and then will disable and free it.
*
* @clk: A clock struct array that was previously successfully
* requested by clk_request/get_by_*().
* @count Number of clock contained in the array
* @return zero on success, or -ve error code.
*/
int clk_release_all(struct clk *clk, int count);
int soc_clk_dump(void);
#endif