Commit fceec41b authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

Merge tag 'qcom-drivers-for-4.9' of... 

Merge tag 'qcom-drivers-for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers

Pull "Qualcomm ARM Based Driver Updates for v4.9" from Andy Gross:

* Silence smem probe defer messages
* Make scm explicitly non-modular
* Assorted SMD bug fixes and minor changes
* Add PM8018 RTC support

* tag 'qcom-drivers-for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  rtc: rtc-pm8xxx: Add support for pm8018 rtc
  soc: qcom: smd: Reset rx tail rather than tx
  soc: qcom: smd: Represent smd edges as devices
  soc: qcom: smd: Request irqs after parsing properties
  soc: qcom: smd: Simplify multi channel handling
  soc: qcom: smd: Correct compile stub prototypes
  firmware: qcom_scm: make it explicitly non-modular
  soc: qcom: smem: Silence probe defer error
parents e747ea14 23c282d6

Documentation/devicetree/bindings/mfd/qcom-pm8xxx.txt

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ The below bindings specify the set of valid subnodes. 
		    "qcom,pm8058-rtc"

		    "qcom,pm8921-rtc"

		    "qcom,pm8941-rtc"

		    "qcom,pm8018-rtc"



- reg:

	Usage: required

drivers/firmware/qcom_scm.c

+5 −14
Original line number Diff line number Diff line 
/* Copyright (c) 2010,2015, The Linux Foundation. All rights reserved.

/*

 * Qualcomm SCM driver

 *

 * Copyright (c) 2010,2015, The Linux Foundation. All rights reserved.

 * Copyright (C) 2015 Linaro Ltd.

 *

 * This program is free software; you can redistribute it and/or modify
@@ -12,7 +15,7 @@ 
 *

 */

#include <linux/platform_device.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/cpumask.h>

#include <linux/export.h>

#include <linux/dma-mapping.h>
@@ -376,8 +379,6 @@ static const struct of_device_id qcom_scm_dt_match[] = { 
	{}

};



MODULE_DEVICE_TABLE(of, qcom_scm_dt_match);



static struct platform_driver qcom_scm_driver = {

	.driver = {

		.name	= "qcom_scm",
@@ -414,14 +415,4 @@ static int __init qcom_scm_init(void) 


	return platform_driver_register(&qcom_scm_driver);

}



subsys_initcall(qcom_scm_init);
 


static void __exit qcom_scm_exit(void)

{

	platform_driver_unregister(&qcom_scm_driver);

}

module_exit(qcom_scm_exit);



MODULE_DESCRIPTION("Qualcomm SCM driver");

MODULE_LICENSE("GPL v2");

drivers/rtc/rtc-pm8xxx.c

+1 −0
Original line number Diff line number Diff line
@@ -428,6 +428,7 @@ static const struct pm8xxx_rtc_regs pm8941_regs = { 
 */

static const struct of_device_id pm8xxx_id_table[] = {

	{ .compatible = "qcom,pm8921-rtc", .data = &pm8921_regs },

	{ .compatible = "qcom,pm8018-rtc", .data = &pm8921_regs },

	{ .compatible = "qcom,pm8058-rtc", .data = &pm8058_regs },

	{ .compatible = "qcom,pm8941-rtc", .data = &pm8941_regs },

	{ },

drivers/soc/qcom/smd.c

+155 −110
Original line number Diff line number Diff line
@@ -95,7 +95,7 @@ static const struct { 


/**

 * struct qcom_smd_edge - representing a remote processor

 * @smd:		handle to qcom_smd

 * @dev:		device for this edge

 * @of_node:		of_node handle for information related to this edge

 * @edge_id:		identifier of this edge

 * @remote_pid:		identifier of remote processor
@@ -111,7 +111,8 @@ static const struct { 
 * @state_work:		work item for edge state changes

 */

struct qcom_smd_edge {

	struct qcom_smd *smd;

	struct device dev;



	struct device_node *of_node;

	unsigned edge_id;

	unsigned remote_pid;
@@ -135,6 +136,8 @@ struct qcom_smd_edge { 
	struct work_struct state_work;

};



#define to_smd_edge(d) container_of(d, struct qcom_smd_edge, dev)



/*

 * SMD channel states.

 */
@@ -197,20 +200,6 @@ struct qcom_smd_channel { 
	void *drvdata;



	struct list_head list;

	struct list_head dev_list;

};



/**

 * struct qcom_smd - smd struct

 * @dev:	device struct

 * @num_edges:	number of entries in @edges

 * @edges:	array of edges to be handled

 */

struct qcom_smd {

	struct device *dev;



	unsigned num_edges;

	struct qcom_smd_edge edges[0];

};



/*
@@ -374,7 +363,7 @@ static void qcom_smd_channel_reset(struct qcom_smd_channel *channel) 
	SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);

	SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);

	SET_TX_CHANNEL_INFO(channel, head, 0);

	SET_TX_CHANNEL_INFO(channel, tail, 0);

	SET_RX_CHANNEL_INFO(channel, tail, 0);



	qcom_smd_signal_channel(channel);
@@ -421,7 +410,7 @@ static void qcom_smd_channel_set_state(struct qcom_smd_channel *channel, 
	if (channel->state == state)

		return;



	dev_dbg(edge->smd->dev, "set_state(%s, %d)\n", channel->name, state);

	dev_dbg(&edge->dev, "set_state(%s, %d)\n", channel->name, state);



	SET_TX_CHANNEL_FLAG(channel, fDSR, is_open);

	SET_TX_CHANNEL_FLAG(channel, fCTS, is_open);
@@ -891,8 +880,6 @@ static int qcom_smd_dev_remove(struct device *dev) 
	struct qcom_smd_device *qsdev = to_smd_device(dev);

	struct qcom_smd_driver *qsdrv = to_smd_driver(dev);

	struct qcom_smd_channel *channel = qsdev->channel;

	struct qcom_smd_channel *tmp;

	struct qcom_smd_channel *ch;



	qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSING);
@@ -911,15 +898,9 @@ static int qcom_smd_dev_remove(struct device *dev) 
	if (qsdrv->remove)

		qsdrv->remove(qsdev);



	/*

	 * The client is now gone, close and release all channels associated

	 * with this sdev

	 */

	list_for_each_entry_safe(ch, tmp, &channel->dev_list, dev_list) {

		qcom_smd_channel_close(ch);

		list_del(&ch->dev_list);

		ch->qsdev = NULL;

	}

	/* The client is now gone, close the primary channel */

	qcom_smd_channel_close(channel);

	channel->qsdev = NULL;



	return 0;

}
@@ -973,13 +954,12 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel) 
	struct qcom_smd_device *qsdev;

	struct qcom_smd_edge *edge = channel->edge;

	struct device_node *node;

	struct qcom_smd *smd = edge->smd;

	int ret;



	if (channel->qsdev)

		return -EEXIST;



	dev_dbg(smd->dev, "registering '%s'\n", channel->name);

	dev_dbg(&edge->dev, "registering '%s'\n", channel->name);



	qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL);

	if (!qsdev)
@@ -990,7 +970,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel) 
		     edge->of_node->name,

		     node ? node->name : channel->name);



	qsdev->dev.parent = smd->dev;

	qsdev->dev.parent = &edge->dev;

	qsdev->dev.bus = &qcom_smd_bus;

	qsdev->dev.release = qcom_smd_release_device;

	qsdev->dev.of_node = node;
@@ -1001,7 +981,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel) 


	ret = device_register(&qsdev->dev);

	if (ret) {

		dev_err(smd->dev, "device_register failed: %d\n", ret);

		dev_err(&edge->dev, "device_register failed: %d\n", ret);

		put_device(&qsdev->dev);

	}
@@ -1091,6 +1071,8 @@ qcom_smd_find_channel(struct qcom_smd_edge *edge, const char *name) 
 *

 * Returns a channel handle on success, or -EPROBE_DEFER if the channel isn't

 * ready.

 *

 * Any channels returned must be closed with a call to qcom_smd_close_channel()

 */

struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *parent,

					       const char *name,
@@ -1120,15 +1102,21 @@ struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *parent, 
		return ERR_PTR(ret);

	}



	/*

	 * Append the list of channel to the channels associated with the sdev

	 */

	list_add_tail(&channel->dev_list, &sdev->channel->dev_list);



	return channel;

}

EXPORT_SYMBOL(qcom_smd_open_channel);



/**

 * qcom_smd_close_channel() - close an additionally opened channel

 * @channel:	channel handle, returned by qcom_smd_open_channel()

 */

void qcom_smd_close_channel(struct qcom_smd_channel *channel)

{

	qcom_smd_channel_close(channel);

	channel->qsdev = NULL;

}

EXPORT_SYMBOL(qcom_smd_close_channel);



/*

 * Allocate the qcom_smd_channel object for a newly found smd channel,

 * retrieving and validating the smem items involved.
@@ -1139,20 +1127,18 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
							char *name)

{

	struct qcom_smd_channel *channel;

	struct qcom_smd *smd = edge->smd;

	size_t fifo_size;

	size_t info_size;

	void *fifo_base;

	void *info;

	int ret;



	channel = devm_kzalloc(smd->dev, sizeof(*channel), GFP_KERNEL);

	channel = devm_kzalloc(&edge->dev, sizeof(*channel), GFP_KERNEL);

	if (!channel)

		return ERR_PTR(-ENOMEM);



	INIT_LIST_HEAD(&channel->dev_list);

	channel->edge = edge;

	channel->name = devm_kstrdup(smd->dev, name, GFP_KERNEL);

	channel->name = devm_kstrdup(&edge->dev, name, GFP_KERNEL);

	if (!channel->name)

		return ERR_PTR(-ENOMEM);
@@ -1175,7 +1161,7 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
	} else if (info_size == 2 * sizeof(struct smd_channel_info)) {

		channel->info = info;

	} else {

		dev_err(smd->dev,

		dev_err(&edge->dev,

			"channel info of size %zu not supported\n", info_size);

		ret = -EINVAL;

		goto free_name_and_channel;
@@ -1190,7 +1176,7 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
	/* The channel consist of a rx and tx fifo of equal size */

	fifo_size /= 2;



	dev_dbg(smd->dev, "new channel '%s' info-size: %zu fifo-size: %zu\n",

	dev_dbg(&edge->dev, "new channel '%s' info-size: %zu fifo-size: %zu\n",

			  name, info_size, fifo_size);



	channel->tx_fifo = fifo_base;
@@ -1202,8 +1188,8 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed 
	return channel;



free_name_and_channel:

	devm_kfree(smd->dev, channel->name);

	devm_kfree(smd->dev, channel);

	devm_kfree(&edge->dev, channel->name);

	devm_kfree(&edge->dev, channel);



	return ERR_PTR(ret);

}
@@ -1219,7 +1205,6 @@ static void qcom_channel_scan_worker(struct work_struct *work) 
	struct qcom_smd_alloc_entry *alloc_tbl;

	struct qcom_smd_alloc_entry *entry;

	struct qcom_smd_channel *channel;

	struct qcom_smd *smd = edge->smd;

	unsigned long flags;

	unsigned fifo_id;

	unsigned info_id;
@@ -1263,7 +1248,7 @@ static void qcom_channel_scan_worker(struct work_struct *work) 
			list_add(&channel->list, &edge->channels);

			spin_unlock_irqrestore(&edge->channels_lock, flags);



			dev_dbg(smd->dev, "new channel found: '%s'\n", channel->name);

			dev_dbg(&edge->dev, "new channel found: '%s'\n", channel->name);

			set_bit(i, edge->allocated[tbl]);



			wake_up_interruptible(&edge->new_channel_event);
@@ -1350,22 +1335,6 @@ static int qcom_smd_parse_edge(struct device *dev, 


	edge->of_node = of_node_get(node);



	irq = irq_of_parse_and_map(node, 0);

	if (irq < 0) {

		dev_err(dev, "required smd interrupt missing\n");

		return -EINVAL;

	}



	ret = devm_request_irq(dev, irq,

			       qcom_smd_edge_intr, IRQF_TRIGGER_RISING,

			       node->name, edge);

	if (ret) {

		dev_err(dev, "failed to request smd irq\n");

		return ret;

	}



	edge->irq = irq;



	key = "qcom,smd-edge";

	ret = of_property_read_u32(node, key, &edge->edge_id);

	if (ret) {
@@ -1400,80 +1369,156 @@ static int qcom_smd_parse_edge(struct device *dev, 
		return -EINVAL;

	}



	irq = irq_of_parse_and_map(node, 0);

	if (irq < 0) {

		dev_err(dev, "required smd interrupt missing\n");

		return -EINVAL;

	}



	ret = devm_request_irq(dev, irq,

			       qcom_smd_edge_intr, IRQF_TRIGGER_RISING,

			       node->name, edge);

	if (ret) {

		dev_err(dev, "failed to request smd irq\n");

		return ret;

	}



	edge->irq = irq;



	return 0;

}



static int qcom_smd_probe(struct platform_device *pdev)

/*

 * Release function for an edge.

 * Reset the state of each associated channel and free the edge context.

 */

static void qcom_smd_edge_release(struct device *dev)

{

	struct qcom_smd_channel *channel;

	struct qcom_smd_edge *edge = to_smd_edge(dev);



	list_for_each_entry(channel, &edge->channels, list) {

		SET_RX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED);

		SET_RX_CHANNEL_INFO(channel, head, 0);

		SET_RX_CHANNEL_INFO(channel, tail, 0);

	}



	kfree(edge);

}



/**

 * qcom_smd_register_edge() - register an edge based on an device_node

 * @parent:	parent device for the edge

 * @node:	device_node describing the edge

 *

 * Returns an edge reference, or negative ERR_PTR() on failure.

 */

struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,

					     struct device_node *node)

{

	struct qcom_smd_edge *edge;

	struct device_node *node;

	struct qcom_smd *smd;

	size_t array_size;

	int num_edges;

	int ret;

	int i = 0;

	void *p;



	/* Wait for smem */

	p = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL);

	if (PTR_ERR(p) == -EPROBE_DEFER)

		return PTR_ERR(p);



	num_edges = of_get_available_child_count(pdev->dev.of_node);

	array_size = sizeof(*smd) + num_edges * sizeof(struct qcom_smd_edge);

	smd = devm_kzalloc(&pdev->dev, array_size, GFP_KERNEL);

	if (!smd)

		return -ENOMEM;

	smd->dev = &pdev->dev;

	edge = kzalloc(sizeof(*edge), GFP_KERNEL);

	if (!edge)

		return ERR_PTR(-ENOMEM);



	smd->num_edges = num_edges;

	for_each_available_child_of_node(pdev->dev.of_node, node) {

		edge = &smd->edges[i++];

		edge->smd = smd;

	init_waitqueue_head(&edge->new_channel_event);



		ret = qcom_smd_parse_edge(&pdev->dev, node, edge);

		if (ret)

			continue;

	edge->dev.parent = parent;

	edge->dev.release = qcom_smd_edge_release;

	dev_set_name(&edge->dev, "%s:%s", dev_name(parent), node->name);

	ret = device_register(&edge->dev);

	if (ret) {

		pr_err("failed to register smd edge\n");

		return ERR_PTR(ret);

	}



	ret = qcom_smd_parse_edge(&edge->dev, node, edge);

	if (ret) {

		dev_err(&edge->dev, "failed to parse smd edge\n");

		goto unregister_dev;

	}



	schedule_work(&edge->scan_work);



	return edge;



unregister_dev:

	put_device(&edge->dev);

	return ERR_PTR(ret);

}

EXPORT_SYMBOL(qcom_smd_register_edge);



	platform_set_drvdata(pdev, smd);

static int qcom_smd_remove_device(struct device *dev, void *data)

{

	device_unregister(dev);

	of_node_put(dev->of_node);

	put_device(dev);



	return 0;

}



/*

 * Shut down all smd clients by making sure that each edge stops processing

 * events and scanning for new channels, then call destroy on the devices.

/**

 * qcom_smd_unregister_edge() - release an edge and its children

 * @edge:	edge reference acquired from qcom_smd_register_edge

 */

static int qcom_smd_remove(struct platform_device *pdev)

int qcom_smd_unregister_edge(struct qcom_smd_edge *edge)

{

	struct qcom_smd_channel *channel;

	struct qcom_smd_edge *edge;

	struct qcom_smd *smd = platform_get_drvdata(pdev);

	int i;



	for (i = 0; i < smd->num_edges; i++) {

		edge = &smd->edges[i];

	int ret;



	disable_irq(edge->irq);

	cancel_work_sync(&edge->scan_work);

	cancel_work_sync(&edge->state_work);



		/* No need to lock here, because the writer is gone */

		list_for_each_entry(channel, &edge->channels, list) {

			if (!channel->qsdev)

				continue;

	ret = device_for_each_child(&edge->dev, NULL, qcom_smd_remove_device);

	if (ret)

		dev_warn(&edge->dev, "can't remove smd device: %d\n", ret);



			qcom_smd_destroy_device(channel);

		}

	device_unregister(&edge->dev);



	return 0;

}

EXPORT_SYMBOL(qcom_smd_unregister_edge);



static int qcom_smd_probe(struct platform_device *pdev)

{

	struct device_node *node;

	void *p;



	/* Wait for smem */

	p = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL);

	if (PTR_ERR(p) == -EPROBE_DEFER)

		return PTR_ERR(p);



	for_each_available_child_of_node(pdev->dev.of_node, node)

		qcom_smd_register_edge(&pdev->dev, node);



	return 0;

}



static int qcom_smd_remove_edge(struct device *dev, void *data)

{

	struct qcom_smd_edge *edge = to_smd_edge(dev);



	return qcom_smd_unregister_edge(edge);

}



/*

 * Shut down all smd clients by making sure that each edge stops processing

 * events and scanning for new channels, then call destroy on the devices.

 */

static int qcom_smd_remove(struct platform_device *pdev)

{

	int ret;



	ret = device_for_each_child(&pdev->dev, NULL, qcom_smd_remove_edge);

	if (ret)

		dev_warn(&pdev->dev, "can't remove smd device: %d\n", ret);



	return ret;

}



static const struct of_device_id qcom_smd_of_match[] = {

	{ .compatible = "qcom,smd" },

	{}

drivers/soc/qcom/smem.c

+2 −1
Original line number Diff line number Diff line
@@ -740,6 +740,7 @@ static int qcom_smem_probe(struct platform_device *pdev) 


	hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);

	if (hwlock_id < 0) {

		if (hwlock_id != -EPROBE_DEFER)

			dev_err(&pdev->dev, "failed to retrieve hwlock\n");

		return hwlock_id;

	}

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