Merge tag 'drivers_soc_for_4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers

soc: driver soc update for v4.20

  - Enable host-id as an optional dt property
  - Fix minor typo in knav driver

* tag 'drivers_soc_for_4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  soc: ti: fix spelling mistake "instace" -> "instance"
  firmware: ti_sci: Provide host-id as an optional dt parameter
  Documentation: dt: keystone: ti-sci: Add optional host-id parameter

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 7fa744793bc5..69ed1464175c 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -66,14 +66,14 @@ struct ti_sci_xfers_info {
 
 /**
  * struct ti_sci_desc - Description of SoC integration
- * @host_id:		Host identifier representing the compute entity
+ * @default_host_id:	Host identifier representing the compute entity
  * @max_rx_timeout_ms:	Timeout for communication with SoC (in Milliseconds)
  * @max_msgs: Maximum number of messages that can be pending
  *		  simultaneously in the system
  * @max_msg_size: Maximum size of data per message that can be handled.
  */
 struct ti_sci_desc {
-	u8 host_id;
+	u8 default_host_id;
 	int max_rx_timeout_ms;
 	int max_msgs;
 	int max_msg_size;
@@ -94,6 +94,7 @@ struct ti_sci_desc {
  * @chan_rx:	Receive mailbox channel
  * @minfo:	Message info
  * @node:	list head
+ * @host_id:	Host ID
  * @users:	Number of users of this instance
  */
 struct ti_sci_info {
@@ -110,6 +111,7 @@ struct ti_sci_info {
 	struct mbox_chan *chan_rx;
 	struct ti_sci_xfers_info minfo;
 	struct list_head node;
+	u8 host_id;
 	/* protected by ti_sci_list_mutex */
 	int users;
 
@@ -370,7 +372,7 @@ static struct ti_sci_xfer *ti_sci_get_one_xfer(struct ti_sci_info *info,
 
 	hdr->seq = xfer_id;
 	hdr->type = msg_type;
-	hdr->host = info->desc->host_id;
+	hdr->host = info->host_id;
 	hdr->flags = msg_flags;
 
 	return xfer;
@@ -1793,7 +1795,7 @@ static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode,
 
 /* Description for K2G */
 static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = {
-	.host_id = 2,
+	.default_host_id = 2,
 	/* Conservative duration */
 	.max_rx_timeout_ms = 1000,
 	/* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */
@@ -1819,6 +1821,7 @@ static int ti_sci_probe(struct platform_device *pdev)
 	int ret = -EINVAL;
 	int i;
 	int reboot = 0;
+	u32 h_id;
 
 	of_id = of_match_device(ti_sci_of_match, dev);
 	if (!of_id) {
@@ -1833,6 +1836,19 @@ static int ti_sci_probe(struct platform_device *pdev)
 
 	info->dev = dev;
 	info->desc = desc;
+	ret = of_property_read_u32(dev->of_node, "ti,host-id", &h_id);
+	/* if the property is not present in DT, use a default from desc */
+	if (ret < 0) {
+		info->host_id = info->desc->default_host_id;
+	} else {
+		if (!h_id) {
+			dev_warn(dev, "Host ID 0 is reserved for firmware\n");
+			info->host_id = info->desc->default_host_id;
+		} else {
+			info->host_id = h_id;
+		}
+	}
+
 	reboot = of_property_read_bool(dev->of_node,
 				       "ti,system-reboot-controller");
 	INIT_LIST_HEAD(&info->node);