Remove most references to 'master' in the code now that we've decided to
migrate all the users of the ops structure to the aggregate driver.
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Rob Clark <robdclark@xxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Saravana Kannan <saravanak@xxxxxxxxxx>
Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
drivers/base/component.c | 250 +++++++++++++++++++-------------------
include/linux/component.h | 2 +-
2 files changed, 124 insertions(+), 128 deletions(-)
diff --git a/drivers/base/component.c b/drivers/base/component.c
index d25048d04b70..a2a6f8def07a 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -1,11 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Componentized device handling.
- *
- * This is work in progress. We gather up the component devices into a list,
- * and bind them when instructed. At the moment, we're specific to the DRM
- * subsystem, and only handles one master device, but this doesn't have to be
- * the case.
*/
#include <linux/component.h>
#include <linux/device.h>
@@ -58,7 +53,7 @@ struct component_match {
struct component_match_array *compare;
};
-struct master {
+struct aggregate_device {
struct list_head node;
bool bound;
@@ -72,7 +67,7 @@ struct master {
struct component {
struct list_head node;
- struct master *master;
+ struct aggregate_device *adev;
bool bound;
const struct component_ops *ops;
@@ -82,7 +77,7 @@ struct component {
static DEFINE_MUTEX(component_mutex);
static LIST_HEAD(component_list);
-static LIST_HEAD(masters);
+static LIST_HEAD(aggregate_devices);
static DEFINE_IDA(aggregate_ida);
#ifdef CONFIG_DEBUG_FS
@@ -91,12 +86,12 @@ static struct dentry *component_debugfs_dir;
static int component_devices_show(struct seq_file *s, void *data)
{
- struct master *m = s->private;
+ struct aggregate_device *m = s->private;
struct component_match *match = m->match;
size_t i;
mutex_lock(&component_mutex);
- seq_printf(s, "%-40s %20s\n", "master name", "status");
+ seq_printf(s, "%-40s %20s\n", "aggregate_device name", "status");
seq_puts(s, "-------------------------------------------------------------\n");
seq_printf(s, "%-40s %20s\n\n",
dev_name(m->parent), m->bound ? "bound" : "not bound");
@@ -126,46 +121,46 @@ static int __init component_debug_init(void)
core_initcall(component_debug_init);
-static void component_master_debugfs_add(struct master *m)
+static void component_debugfs_add(struct aggregate_device *m)
{
debugfs_create_file(dev_name(m->parent), 0444, component_debugfs_dir, m,
&component_devices_fops);
}
-static void component_master_debugfs_del(struct master *m)
+static void component_debugfs_del(struct aggregate_device *m)
{
debugfs_remove(debugfs_lookup(dev_name(m->parent), component_debugfs_dir));
}
#else
-static void component_master_debugfs_add(struct master *m)
+static void component_debugfs_add(struct aggregate_device *m)
{ }
-static void component_master_debugfs_del(struct master *m)
+static void component_debugfs_del(struct aggregate_device *m)
{ }
#endif
-static struct master *__master_find(struct device *parent,
+static struct aggregate_device *__aggregate_find(struct device *parent,
const struct component_master_ops *ops)
{
- struct master *m;
+ struct aggregate_device *m;
- list_for_each_entry(m, &masters, node)
+ list_for_each_entry(m, &aggregate_devices, node)
if (m->parent == parent && (!ops || m->ops == ops))
return m;
return NULL;
}
-static struct component *find_component(struct master *master,
+static struct component *find_component(struct aggregate_device *adev,
struct component_match_array *mc)
{
struct component *c;
list_for_each_entry(c, &component_list, node) {
- if (c->master && c->master != master)
+ if (c->adev && c->adev != adev)
continue;
if (mc->compare && mc->compare(c->dev, mc->data))
@@ -179,102 +174,103 @@ static struct component *find_component(struct master *master,
return NULL;
}
-static int find_components(struct master *master)
+static int find_components(struct aggregate_device *adev)
{
- struct component_match *match = master->match;
+ struct component_match *match = adev->match;
size_t i;
int ret = 0;
/*
* Scan the array of match functions and attach
- * any components which are found to this master.
+ * any components which are found to this adev.
*/
for (i = 0; i < match->num; i++) {
struct component_match_array *mc = &match->compare[i];
struct component *c;
- dev_dbg(master->parent, "Looking for component %zu\n", i);
+ dev_dbg(adev->parent, "Looking for component %zu\n", i);
if (match->compare[i].component)
continue;
- c = find_component(master, mc);
+ c = find_component(adev, mc);
if (!c) {
ret = -ENXIO;
break;
}
- dev_dbg(master->parent, "found component %s, duplicate %u\n", dev_name(c->dev), !!c->master);
+ dev_dbg(adev->parent, "found component %s, duplicate %u\n",
+ dev_name(c->dev), !!c->adev);
- /* Attach this component to the master */
- match->compare[i].duplicate = !!c->master;
+ /* Attach this component to the adev */
+ match->compare[i].duplicate = !!c->adev;
match->compare[i].component = c;
- c->master = master;
+ c->adev = adev;
}
return ret;
}
-/* Detach component from associated master */
-static void remove_component(struct master *master, struct component *c)
+/* Detach component from associated aggregate_device */
+static void remove_component(struct aggregate_device *adev, struct component *c)
{
size_t i;
- /* Detach the component from this master. */
- for (i = 0; i < master->match->num; i++)
- if (master->match->compare[i].component == c)
- master->match->compare[i].component = NULL;
+ /* Detach the component from this adev. */
+ for (i = 0; i < adev->match->num; i++)
+ if (adev->match->compare[i].component == c)
+ adev->match->compare[i].component = NULL;
}
/*
- * Try to bring up a master. If component is NULL, we're interested in
- * this master, otherwise it's a component which must be present to try
- * and bring up the master.
+ * Try to bring up an aggregate device. If component is NULL, we're interested
+ * in this aggregate device, otherwise it's a component which must be present
+ * to try and bring up the aggregate device.
*
* Returns 1 for successful bringup, 0 if not ready, or -ve errno.
*/
-static int try_to_bring_up_master(struct master *master,
+static int try_to_bring_up_aggregate_device(struct aggregate_device *adev,
struct component *component)
{
int ret;
- dev_dbg(master->parent, "trying to bring up master\n");
+ dev_dbg(adev->parent, "trying to bring up adev\n");
- if (find_components(master)) {
- dev_dbg(master->parent, "master has incomplete components\n");
+ if (find_components(adev)) {
+ dev_dbg(adev->parent, "master has incomplete components\n");
return 0;
}
- if (component && component->master != master) {
- dev_dbg(master->parent, "master is not for this component (%s)\n",
+ if (component && component->adev != adev) {
+ dev_dbg(adev->parent, "master is not for this component (%s)\n",
dev_name(component->dev));
return 0;
}
- if (!devres_open_group(master->parent, master, GFP_KERNEL))
+ if (!devres_open_group(adev->parent, adev, GFP_KERNEL))
return -ENOMEM;
/* Found all components */
- ret = master->ops->bind(master->parent);
+ ret = adev->ops->bind(adev->parent);
if (ret < 0) {
- devres_release_group(master->parent, NULL);
+ devres_release_group(adev->parent, NULL);
if (ret != -EPROBE_DEFER)
- dev_info(master->parent, "master bind failed: %d\n", ret);
+ dev_info(adev->parent, "adev bind failed: %d\n", ret);
return ret;
}
- devres_close_group(master->parent, NULL);
- master->bound = true;
+ devres_close_group(adev->parent, NULL);
+ adev->bound = true;
return 1;
}
static int try_to_bring_up_masters(struct component *component)
{
- struct master *m;
+ struct aggregate_device *adev;
int ret = 0;
- list_for_each_entry(m, &masters, node) {
- if (!m->bound) {
- ret = try_to_bring_up_master(m, component);
+ list_for_each_entry(adev, &aggregate_devices, node) {
+ if (!adev->bound) {
+ ret = try_to_bring_up_aggregate_device(adev, component);
if (ret != 0)
break;
}
@@ -283,12 +279,12 @@ static int try_to_bring_up_masters(struct component *component)
return ret;
}
-static void take_down_master(struct master *master)
+static void take_down_aggregate_device(struct aggregate_device *adev)
{
- if (master->bound) {
- master->ops->unbind(master->parent);
- devres_release_group(master->parent, master);
- master->bound = false;
+ if (adev->bound) {
+ adev->ops->unbind(adev->parent);
+ devres_release_group(adev->parent, adev);
+ adev->bound = false;
}
}
@@ -329,7 +325,7 @@ static int component_match_realloc(struct component_match *match, size_t num)
return 0;
}
-static void __component_match_add(struct device *master,
+static void __component_match_add(struct device *parent,
struct component_match **matchptr,
void (*release)(struct device *, void *),
int (*compare)(struct device *, void *),
@@ -349,7 +345,7 @@ static void __component_match_add(struct device *master,
return;
}
- devres_add(master, match);
+ devres_add(parent, match);
*matchptr = match;
}
@@ -375,13 +371,13 @@ static void __component_match_add(struct device *master,
/**
* component_match_add_release - add a component match entry with release callback
- * @master: device with the aggregate driver
+ * @parent: parent device of the aggregate driver
* @matchptr: pointer to the list of component matches
* @release: release function for @compare_data
* @compare: compare function to match against all components
* @compare_data: opaque pointer passed to the @compare function
*
- * Adds a new component match to the list stored in @matchptr, which the @master
+ * Adds a new component match to the list stored in @matchptr, which the
* aggregate driver needs to function. The list of component matches pointed to
* by @matchptr must be initialized to NULL before adding the first match. This
* only matches against components added with component_add().
@@ -393,24 +389,24 @@ static void __component_match_add(struct device *master,
*
* See also component_match_add() and component_match_add_typed().
*/
-void component_match_add_release(struct device *master,
+void component_match_add_release(struct device *parent,
struct component_match **matchptr,
void (*release)(struct device *, void *),
int (*compare)(struct device *, void *), void *compare_data)
{
- __component_match_add(master, matchptr, release, compare, NULL,
+ __component_match_add(parent, matchptr, release, compare, NULL,
compare_data);
}
EXPORT_SYMBOL(component_match_add_release);
/**
* component_match_add_typed - add a component match entry for a typed component
- * @master: device with the aggregate driver
+ * @parent: parent device of the aggregate driver
* @matchptr: pointer to the list of component matches
* @compare_typed: compare function to match against all typed components
* @compare_data: opaque pointer passed to the @compare function
*
- * Adds a new component match to the list stored in @matchptr, which the @master
+ * Adds a new component match to the list stored in @matchptr, which the
* aggregate driver needs to function. The list of component matches pointed to
* by @matchptr must be initialized to NULL before adding the first match. This
* only matches against components added with component_add_typed().
@@ -420,33 +416,33 @@ EXPORT_SYMBOL(component_match_add_release);
*
* See also component_match_add_release() and component_match_add_typed().
*/
-void component_match_add_typed(struct device *master,
+void component_match_add_typed(struct device *parent,
struct component_match **matchptr,
int (*compare_typed)(struct device *, int, void *), void *compare_data)
{
- __component_match_add(master, matchptr, NULL, NULL, compare_typed,
+ __component_match_add(parent, matchptr, NULL, NULL, compare_typed,
compare_data);
}
EXPORT_SYMBOL(component_match_add_typed);
-static void free_master(struct master *master)
+static void free_aggregate_device(struct aggregate_device *adev)
{
- struct component_match *match = master->match;
+ struct component_match *match = adev->match;
int i;
- component_master_debugfs_del(master);
- list_del(&master->node);
+ component_debugfs_del(adev);
+ list_del(&adev->node);
if (match) {
for (i = 0; i < match->num; i++) {
struct component *c = match->compare[i].component;
if (c)
- c->master = NULL;
+ c->adev = NULL;
}
}
- ida_free(&aggregate_ida, master->id);
- kfree(master);
+ ida_free(&aggregate_ida, adev->id);
+ kfree(adev);
}
/**
@@ -465,7 +461,7 @@ int component_master_add_with_match(struct device *parent,
const struct component_master_ops *ops,
struct component_match *match)
{
- struct master *master;
+ struct aggregate_device *adev;
int ret, id;
/* Reallocate the match array for its true size */
@@ -473,31 +469,31 @@ int component_master_add_with_match(struct device *parent,
if (ret)
return ret;
- master = kzalloc(sizeof(*master), GFP_KERNEL);
- if (!master)
+ adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+ if (!adev)
return -ENOMEM;
id = ida_alloc(&aggregate_ida, GFP_KERNEL);
if (id < 0) {
- kfree(master);
+ kfree(adev);
return id;
}
- master->id = id;
- master->parent = parent;
- master->ops = ops;
- master->match = match;
- dev_set_name(&master->dev, "aggregate%d", id);
+ adev->id = id;
+ adev->parent = parent;
+ adev->ops = ops;
+ adev->match = match;
+ dev_set_name(&adev->dev, "aggregate%d", id);
- component_master_debugfs_add(master);
- /* Add to the list of available masters. */
+ component_debugfs_add(adev);
+ /* Add to the list of available aggregate devices. */
mutex_lock(&component_mutex);
- list_add(&master->node, &masters);
+ list_add(&adev->node, &aggregate_devices);
- ret = try_to_bring_up_master(master, NULL);
+ ret = try_to_bring_up_aggregate_device(adev, NULL);
if (ret < 0)
- free_master(master);
+ free_aggregate_device(adev);
mutex_unlock(&component_mutex);
@@ -517,25 +513,25 @@ EXPORT_SYMBOL_GPL(component_master_add_with_match);
void component_master_del(struct device *parent,
const struct component_master_ops *ops)
{
- struct master *master;
+ struct aggregate_device *adev;
mutex_lock(&component_mutex);
- master = __master_find(parent, ops);
- if (master) {
- take_down_master(master);
- free_master(master);
+ adev = __aggregate_find(parent, ops);
+ if (adev) {
+ take_down_aggregate_device(adev);
+ free_aggregate_device(adev);
}
mutex_unlock(&component_mutex);
}
EXPORT_SYMBOL_GPL(component_master_del);
static void component_unbind(struct component *component,
- struct master *master, void *data)
+ struct aggregate_device *adev, void *data)
{
WARN_ON(!component->bound);
if (component->ops && component->ops->unbind)
- component->ops->unbind(component->dev, master->parent, data);
+ component->ops->unbind(component->dev, adev->parent, data);
component->bound = false;
/* Release all resources claimed in the binding of this component */
@@ -553,26 +549,26 @@ static void component_unbind(struct component *component,
*/
void component_unbind_all(struct device *parent, void *data)
{
- struct master *master;
+ struct aggregate_device *adev;
struct component *c;
size_t i;
WARN_ON(!mutex_is_locked(&component_mutex));
- master = __master_find(parent, NULL);
- if (!master)
+ adev = __aggregate_find(parent, NULL);
+ if (!adev)
return;
/* Unbind components in reverse order */
- for (i = master->match->num; i--; )
- if (!master->match->compare[i].duplicate) {
- c = master->match->compare[i].component;
- component_unbind(c, master, data);
+ for (i = adev->match->num; i--; )
+ if (!adev->match->compare[i].duplicate) {
+ c = adev->match->compare[i].component;
+ component_unbind(c, adev, data);
}
}
EXPORT_SYMBOL_GPL(component_unbind_all);
-static int component_bind(struct component *component, struct master *master,
+static int component_bind(struct component *component, struct aggregate_device *adev,
void *data)
{
int ret;
@@ -582,7 +578,7 @@ static int component_bind(struct component *component, struct master *master,
* This allows us to roll-back a failed component without
* affecting anything else.
*/
- if (!devres_open_group(master->parent, NULL, GFP_KERNEL))
+ if (!devres_open_group(adev->parent, NULL, GFP_KERNEL))
return -ENOMEM;
/*
@@ -591,14 +587,14 @@ static int component_bind(struct component *component, struct master *master,
* at the appropriate moment.
*/
if (!devres_open_group(component->dev, component, GFP_KERNEL)) {
- devres_release_group(master->parent, NULL);
+ devres_release_group(adev->parent, NULL);
return -ENOMEM;
}
- dev_dbg(master->parent, "binding %s (ops %ps)\n",
+ dev_dbg(adev->parent, "binding %s (ops %ps)\n",
dev_name(component->dev), component->ops);
- ret = component->ops->bind(component->dev, master->parent, data);
+ ret = component->ops->bind(component->dev, adev->parent, data);
if (!ret) {
component->bound = true;
@@ -609,16 +605,16 @@ static int component_bind(struct component *component, struct master *master,
* can clean those resources up independently.
*/
devres_close_group(component->dev, NULL);
- devres_remove_group(master->parent, NULL);
+ devres_remove_group(adev->parent, NULL);
- dev_info(master->parent, "bound %s (ops %ps)\n",
+ dev_info(adev->parent, "bound %s (ops %ps)\n",
dev_name(component->dev), component->ops);
} else {
devres_release_group(component->dev, NULL);
- devres_release_group(master->parent, NULL);
+ devres_release_group(adev->parent, NULL);
if (ret != -EPROBE_DEFER)
- dev_err(master->parent, "failed to bind %s (ops %ps): %d\n",
+ dev_err(adev->parent, "failed to bind %s (ops %ps): %d\n",
dev_name(component->dev), component->ops, ret);
}
@@ -636,31 +632,31 @@ static int component_bind(struct component *component, struct master *master,
*/
int component_bind_all(struct device *parent, void *data)
{
- struct master *master;
+ struct aggregate_device *adev;
struct component *c;
size_t i;
int ret = 0;
WARN_ON(!mutex_is_locked(&component_mutex));
- master = __master_find(parent, NULL);
- if (!master)
+ adev = __aggregate_find(parent, NULL);
+ if (!adev)
return -EINVAL;
/* Bind components in match order */
- for (i = 0; i < master->match->num; i++)
- if (!master->match->compare[i].duplicate) {
- c = master->match->compare[i].component;
- ret = component_bind(c, master, data);
+ for (i = 0; i < adev->match->num; i++)
+ if (!adev->match->compare[i].duplicate) {
+ c = adev->match->compare[i].component;
+ ret = component_bind(c, adev, data);
if (ret)
break;
}
if (ret != 0) {
for (; i > 0; i--)
- if (!master->match->compare[i - 1].duplicate) {
- c = master->match->compare[i - 1].component;
- component_unbind(c, master, data);
+ if (!adev->match->compare[i - 1].duplicate) {
+ c = adev->match->compare[i - 1].component;
+ component_unbind(c, adev, data);
}
}
@@ -689,8 +685,8 @@ static int __component_add(struct device *dev, const struct component_ops *ops,
ret = try_to_bring_up_masters(component);
if (ret < 0) {
- if (component->master)
- remove_component(component->master, component);
+ if (component->adev)
+ remove_component(component->adev, component);
list_del(&component->node);
kfree(component);
@@ -771,9 +767,9 @@ void component_del(struct device *dev, const struct component_ops *ops)
break;
}
- if (component && component->master) {
- take_down_master(component->master);
- remove_component(component->master, component);
+ if (component && component->adev) {
+ take_down_aggregate_device(component->adev);
+ remove_component(component->adev, component);
}
mutex_unlock(&component_mutex);
diff --git a/include/linux/component.h b/include/linux/component.h
index 16de18f473d7..71bfc3862633 100644
--- a/include/linux/component.h
+++ b/include/linux/component.h
@@ -41,7 +41,7 @@ void component_del(struct device *, const struct component_ops *);
int component_bind_all(struct device *master, void *master_data);
void component_unbind_all(struct device *master, void *master_data);
-struct master;
+struct aggregate_device;
/**
* struct component_master_ops - callback for the aggregate driver
--
https://chromeos.dev
