From: Patrice Chotard <patrice.chot...@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.chot...@st.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
v11: _ none
v10: _ none
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
--
1.9.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
