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reset: add reset_release_all()

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Add reset_release_all() method which Assert/Free an
array of resets signal that has been previously successfully
requested by reset_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 11:57:06 +02:00 committed by Marek Vasut
parent 9bd5cdf6b6
commit 3b9d1bdd4e
2 changed files with 43 additions and 0 deletions
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25
drivers/reset/reset-uclass.c
View file

@ -42,6 +42,7 @@ int reset_get_by_index(struct udevice *dev, int index,
debug("%s(dev=%p, index=%d, reset_ctl=%p)\n", __func__, dev, index,
reset_ctl);
reset_ctl->dev = NULL;
ret = dev_read_phandle_with_args(dev, "resets", "#reset-cells", 0,
index, &args);
@ -87,6 +88,7 @@ int reset_get_by_name(struct udevice *dev, const char *name,
debug("%s(dev=%p, name=%s, reset_ctl=%p)\n", __func__, dev, name,
reset_ctl);
reset_ctl->dev = NULL;
index = dev_read_stringlist_search(dev, "reset-names", name);
if (index < 0) {
@ -133,6 +135,29 @@ int reset_deassert(struct reset_ctl *reset_ctl)
return ops->rst_deassert(reset_ctl);
}
int reset_release_all(struct reset_ctl *reset_ctl, int count)
{
int i, ret;
for (i = 0; i < count; i++) {
debug("%s(reset_ctl[%d]=%p)\n", __func__, i, &reset_ctl[i]);
/* check if reset has been previously requested */
if (!reset_ctl[i].dev)
continue;
ret = reset_assert(&reset_ctl[i]);
if (ret)
return ret;
ret = reset_free(&reset_ctl[i]);
if (ret)
return ret;
}
return 0;
}
UCLASS_DRIVER(reset) = {
.id = UCLASS_RESET,
.name = "reset",

18
include/reset.h
View file

@ -144,6 +144,18 @@ int reset_assert(struct reset_ctl *reset_ctl);
*/
int reset_deassert(struct reset_ctl *reset_ctl);
/**
* reset_release_all - Assert/Free an array of previously requested resets.
*
* For each reset contained in the reset array, this function will check if
* reset has been previously requested and then will assert and free it.
*
* @reset_ctl: A reset struct array that was previously successfully
* requested by reset_get_by_*().
* @count Number of reset contained in the array
* @return 0 if OK, or a negative error code.
*/
int reset_release_all(struct reset_ctl *reset_ctl, int count);
#else
static inline int reset_get_by_index(struct udevice *dev, int index,
struct reset_ctl *reset_ctl)
@ -171,6 +183,12 @@ static inline int reset_deassert(struct reset_ctl *reset_ctl)
{
return 0;
}
static inline int reset_release_all(struct reset_ctl *reset_ctl, int count)
{
return 0;
}
#endif
#endif