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remoteproc: k3_system_controller: Support optional boot_notification channel

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If there is an optional boot notification channel that an SoC uses
separate from the rx path, use the same.

Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Nishanth Menon 2022-01-25 20:56:27 +05:30 • committed by Tom Rini
parent 8b139f4e1c
commit 473bd5aee1
2 changed files with 22 additions and 1 deletions
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3
doc/device-tree-bindings/remoteproc/k3-system-controller.txt
View file

@ -13,6 +13,9 @@ Required properties:
"rx" for Receive channel "rx" for Receive channel
- mboxes: Corresponding phandles to mailbox channels. - mboxes: Corresponding phandles to mailbox channels.
Optional properties:
--------------------
- mbox-names: "boot_notify" for Optional alternate boot notification channel.
Example: Example:
-------- --------

20
drivers/remoteproc/k3_system_controller.c
View file

@ -77,14 +77,18 @@ struct k3_sysctrler_desc {
* struct k3_sysctrler_privdata - Structure representing System Controller data. * struct k3_sysctrler_privdata - Structure representing System Controller data.
* @chan_tx: Transmit mailbox channel * @chan_tx: Transmit mailbox channel
* @chan_rx: Receive mailbox channel * @chan_rx: Receive mailbox channel
* @chan_boot_notify: Boot notification channel
* @desc: SoC description for this instance * @desc: SoC description for this instance
* @seq_nr: Counter for number of messages sent. * @seq_nr: Counter for number of messages sent.
* @has_boot_notify: Has separate boot notification channel
*/ */
struct k3_sysctrler_privdata { struct k3_sysctrler_privdata {
struct mbox_chan chan_tx; struct mbox_chan chan_tx;
struct mbox_chan chan_rx; struct mbox_chan chan_rx;
struct mbox_chan chan_boot_notify;
struct k3_sysctrler_desc *desc; struct k3_sysctrler_desc *desc;
u32 seq_nr; u32 seq_nr;
bool has_boot_notify;
}; };
static inline static inline
@ -223,7 +227,8 @@ static int k3_sysctrler_start(struct udevice *dev)
debug("%s(dev=%p)\n", __func__, dev); debug("%s(dev=%p)\n", __func__, dev);
/* Receive the boot notification. Note that it is sent only once. */ /* 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) { if (ret) {
dev_err(dev, "%s: Boot Notification response failed. ret = %d\n", dev_err(dev, "%s: Boot Notification response failed. ret = %d\n",
__func__, ret); __func__, ret);
@ -272,6 +277,19 @@ static int k3_of_to_priv(struct udevice *dev,
return ret; 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; return 0;
} }