From: Patrice Chotard patrice.chotard@st.com
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 --- v9: _ to avoid confusion, rename reset_assert_all() in reset_release_all() as this function not only assert all resets but also free all of them _ add a check in reset_release_all() to verify if a reset has been previously requested before asserting and freeing it. v8: _ none v7: _ none v6: _ none v5: _ none v4: _ add reset_assert_all() method as suggested by Marek Vasut and Simon Glass
drivers/reset/reset-uclass.c | 25 +++++++++++++++++++++++++ include/reset.h | 18 ++++++++++++++++++ 2 files changed, 43 insertions(+)
diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c index 4fd82b9..307a297 100644 --- a/drivers/reset/reset-uclass.c +++ b/drivers/reset/reset-uclass.c @@ -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", diff --git a/include/reset.h b/include/reset.h index 4f2e35f..7185ade 100644 --- a/include/reset.h +++ b/include/reset.h @@ -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