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 <[e-mail]>

Documentation/devicetree/bindings/arm/keystone/ti,sci.txt

···
 	debug_messages - Map the Debug message region
 - reg:  register space corresponding to the debug_messages
 - ti,system-reboot-controller: If system reboot can be triggered by SoC reboot
+- ti,host-id: Integer value corresponding to the host ID assigned by Firmware
+	for identification of host processing entities such as virtual
+	machines
 
 Example (K2G):
 -------------
 	pmmc: pmmc {
 		compatible = "ti,k2g-sci";
+		ti,host-id = <2>;
 		mbox-names = "rx", "tx";
 		mboxes= <&msgmgr &msgmgr_proxy_pmmc_rx>,
 			<&msgmgr &msgmgr_proxy_pmmc_tx>;

drivers/firmware/ti_sci.c

···
 
 /**
  * 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;
···
  * @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 {
···
 	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;
 
···
 
 	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;
···
 
 /* 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! */
···
 	int ret = -EINVAL;
 	int i;
 	int reboot = 0;
+	u32 h_id;
 
 	of_id = of_match_device(ti_sci_of_match, dev);
 	if (!of_id) {
···
 
 	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);

drivers/soc/ti/knav_dma.c

···
 
 	chan_num = of_channel_match_helper(dev->of_node, name, &instance);
 	if (chan_num < 0) {
-		dev_err(kdev->dev, "No DMA instace with name %s\n", name);
+		dev_err(kdev->dev, "No DMA instance with name %s\n", name);
 		return (void *)-EINVAL;
 	}
 
···
 		}
 	}
 	if (!found) {
-		dev_err(kdev->dev, "No DMA instace with name %s\n", instance);
+		dev_err(kdev->dev, "No DMA instance with name %s\n", instance);
 		return (void *)-EINVAL;
 	}
 

drivers/soc/ti/knav_qmss.h

···
 };
 
 /**
- * struct knav_queue_inst:		qmss queue instace properties
+ * struct knav_queue_inst:		qmss queue instance properties
  * @descs:				descriptor pointer
  * @desc_head, desc_tail, desc_count:	descriptor counters
  * @acc:				accumulator channel pointer
  * @kdev:				qmss device pointer
  * @range:				range info
  * @qmgr:				queue manager info
- * @id:					queue instace id
+ * @id:					queue instance id
  * @irq_num:				irq line number
  * @notify_needed:			notifier needed based on queue type
  * @num_notifiers:			total notifiers
···
 /**
  * struct knav_queue:			qmss queue properties
  * @reg_push, reg_pop, reg_peek:	push, pop queue registers
- * @inst:				qmss queue instace properties
+ * @inst:				qmss queue instance properties
  * @notifier_fn:			notifier function
  * @notifier_fn_arg:			notifier function argument
  * @notifier_enabled:			notier enabled for a give queue