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>

3 files changed, 25 insertions, 9 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);
diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c
index 224d7ddeeb76..23f09dce23e0 100644
--- a/drivers/soc/ti/knav_dma.c
+++ b/drivers/soc/ti/knav_dma.c
@@ -438,7 +438,7 @@ void *knav_dma_open_channel(struct device *dev, const char *name,
 
 	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;
 	}
 
@@ -461,7 +461,7 @@ void *knav_dma_open_channel(struct device *dev, const char *name,
 		}
 	}
 	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;
 	}
 
diff --git a/drivers/soc/ti/knav_qmss.h b/drivers/soc/ti/knav_qmss.h
index 3efc47e82973..7c128132799e 100644
--- a/drivers/soc/ti/knav_qmss.h
+++ b/drivers/soc/ti/knav_qmss.h
@@ -240,14 +240,14 @@ struct knav_pool {
 };
 
 /**
- * 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
@@ -274,7 +274,7 @@ struct knav_queue_inst {
 /**
  * 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