reset: add reset_request()

This is needed in error path to assert previously deasserted
reset by using a saved reset_ctl reference.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c
index de3695f..4fd82b9 100644 (file)
--- a/drivers/reset/reset-uclass.c
+++ b/drivers/reset/reset-uclass.c
@@ -97,6 +97,15 @@ int reset_get_by_name(struct udevice *dev, const char *name,
        return reset_get_by_index(dev, index, reset_ctl);
 }
 
+int reset_request(struct reset_ctl *reset_ctl)
+{
+       struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
+
+       debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
+
+       return ops->request(reset_ctl);
+}
+
 int reset_free(struct reset_ctl *reset_ctl)
 {
        struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);

diff --git a/include/reset.h b/include/reset.h
index f45fcf8..4f2e35f 100644 (file)
--- a/include/reset.h
+++ b/include/reset.h
@@ -100,6 +100,15 @@ int reset_get_by_name(struct udevice *dev, const char *name,
                      struct reset_ctl *reset_ctl);
 
 /**
+ * reset_request - Request a reset signal.
+ *
+ * @reset_ctl: A reset control struct.
+ *
+ * @return 0 if OK, or a negative error code.
+ */
+int reset_request(struct reset_ctl *reset_ctl);
+
+/**
  * reset_free - Free a previously requested reset signal.
  *
  * @reset_ctl: A reset control struct that was previously successfully