@@ -13,6 +13,9 @@ Required properties:
"rx" for Receive channel
- mboxes: Corresponding phandles to mailbox channels.
+Optional properties:
+--------------------
+- mbox-names: "boot_notify" for Optional alternate boot notification channel.
Example:
--------
@@ -77,14 +77,18 @@ struct k3_sysctrler_desc {
* struct k3_sysctrler_privdata - Structure representing System Controller data.
* @chan_tx: Transmit mailbox channel
* @chan_rx: Receive mailbox channel
+ * @chan_boot_notify: Boot notification channel
* @desc: SoC description for this instance
* @seq_nr: Counter for number of messages sent.
+ * @has_boot_notify: Has separate boot notification channel
*/
struct k3_sysctrler_privdata {
struct mbox_chan chan_tx;
struct mbox_chan chan_rx;
+ struct mbox_chan chan_boot_notify;
struct k3_sysctrler_desc *desc;
u32 seq_nr;
+ bool has_boot_notify;
};
static inline
@@ -223,7 +227,8 @@ static int k3_sysctrler_start(struct udevice *dev)
debug("%s(dev=%p)\n", __func__, dev);
/* Receive the boot notification. Note that it is sent only once. */
- ret = mbox_recv(&priv->chan_rx, &msg, priv->desc->max_rx_timeout_us);
+ ret = mbox_recv(priv->has_boot_notify ? &priv->chan_boot_notify :
+ &priv->chan_rx, &msg, priv->desc->max_rx_timeout_us);
if (ret) {
dev_err(dev, "%s: Boot Notification response failed. ret = %d\n",
__func__, ret);
@@ -272,6 +277,19 @@ static int k3_of_to_priv(struct udevice *dev,
return ret;
}
+ /* Some SoCs may have a optional channel for boot notification. */
+ priv->has_boot_notify = 1;
+ ret = mbox_get_by_name(dev, "boot_notify", &priv->chan_boot_notify);
+ if (ret == -ENODATA) {
+ dev_dbg(dev, "%s: Acquiring optional Boot_notify failed. ret = %d. Using Rx\n",
+ __func__, ret);
+ priv->has_boot_notify = 0;
+ } else if (ret) {
+ dev_err(dev, "%s: Acquiring boot_notify channel failed. ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
return 0;
}