reset: Add get/assert/deassert/release for bulk of reset signals
This patch adds a "bulk" API to the reset API in order to get/deassert/
assert/release a group of reset signals associated with a device.
This bulk API will avoid adding a copy of the same code to manage
a group of reset signals in drivers.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c
index 307a297..9a5c9c9 100644
--- a/drivers/reset/reset-uclass.c
+++ b/drivers/reset/reset-uclass.c
@@ -81,6 +81,40 @@
return 0;
}
+int reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk)
+{
+ int i, ret, err, count;
+
+ bulk->count = 0;
+
+ count = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
+ if (!count)
+ return 0;
+
+ bulk->resets = devm_kcalloc(dev, count, sizeof(struct reset_ctl),
+ GFP_KERNEL);
+ if (!bulk->resets)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ ret = reset_get_by_index(dev, i, &bulk->resets[i]);
+ if (ret < 0)
+ goto bulk_get_err;
+
+ ++bulk->count;
+ }
+
+ return 0;
+
+bulk_get_err:
+ err = reset_release_all(bulk->resets, bulk->count);
+ if (err)
+ debug("%s: could release all resets for %p\n",
+ __func__, dev);
+
+ return ret;
+}
+
int reset_get_by_name(struct udevice *dev, const char *name,
struct reset_ctl *reset_ctl)
{
@@ -126,6 +160,19 @@
return ops->rst_assert(reset_ctl);
}
+int reset_assert_bulk(struct reset_ctl_bulk *bulk)
+{
+ int i, ret;
+
+ for (i = 0; i < bulk->count; i++) {
+ ret = reset_assert(&bulk->resets[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
int reset_deassert(struct reset_ctl *reset_ctl)
{
struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
@@ -135,6 +182,19 @@
return ops->rst_deassert(reset_ctl);
}
+int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
+{
+ int i, ret;
+
+ for (i = 0; i < bulk->count; i++) {
+ ret = reset_deassert(&bulk->resets[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
int reset_release_all(struct reset_ctl *reset_ctl, int count)
{
int i, ret;