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[media] V4L: remove clock name from v4l2_clk API
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All uses of the v4l2_clk API so far only register one clock with a fixed
name. This allows us to get rid of it, which also will make CCF and DT
integration easier.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Tested-by: Josh Wu <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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@lyakh @mchehab
lyakh authored and mchehab committed Apr 2, 2015
1 parent 9b239b2 commit a37462b
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Showing 4 changed files with 20 additions and 29 deletions.
6 changes: 3 additions & 3 deletions drivers/media/platform/soc_camera/soc_camera.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1364,7 +1364,7 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd,
snprintf(clk_name, sizeof(clk_name), "%d-%04x",
shd->i2c_adapter_id, shd->board_info->addr);

icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd);
icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
if (IS_ERR(icd->clk)) {
ret = PTR_ERR(icd->clk);
goto eclkreg;
Expand Down Expand Up @@ -1545,7 +1545,7 @@ static int scan_async_group(struct soc_camera_host *ici,
snprintf(clk_name, sizeof(clk_name), "%d-%04x",
sasd->asd.match.i2c.adapter_id, sasd->asd.match.i2c.address);

icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd);
icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
if (IS_ERR(icd->clk)) {
ret = PTR_ERR(icd->clk);
goto eclkreg;
Expand Down Expand Up @@ -1650,7 +1650,7 @@ static int soc_of_bind(struct soc_camera_host *ici,
snprintf(clk_name, sizeof(clk_name), "of-%s",
of_node_full_name(remote));

icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd);
icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
if (IS_ERR(icd->clk)) {
ret = PTR_ERR(icd->clk);
goto eclkreg;
Expand Down
2 changes: 1 addition & 1 deletion drivers/media/usb/em28xx/em28xx-camera.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -330,7 +330,7 @@ int em28xx_init_camera(struct em28xx *dev)

v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
i2c_adapter_id(adap), client->addr);
v4l2->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL);
v4l2->clk = v4l2_clk_register_fixed(clk_name, -EINVAL);
if (IS_ERR(v4l2->clk))
return PTR_ERR(v4l2->clk);

Expand Down
33 changes: 13 additions & 20 deletions drivers/media/v4l2-core/v4l2-clk.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -23,17 +23,13 @@
static DEFINE_MUTEX(clk_lock);
static LIST_HEAD(clk_list);

static struct v4l2_clk *v4l2_clk_find(const char *dev_id, const char *id)
static struct v4l2_clk *v4l2_clk_find(const char *dev_id)
{
struct v4l2_clk *clk;

list_for_each_entry(clk, &clk_list, list) {
if (strcmp(dev_id, clk->dev_id))
continue;

if (!id || !clk->id || !strcmp(clk->id, id))
list_for_each_entry(clk, &clk_list, list)
if (!strcmp(dev_id, clk->dev_id))
return clk;
}

return ERR_PTR(-ENODEV);
}
Expand All @@ -43,7 +39,7 @@ struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id)
struct v4l2_clk *clk;

mutex_lock(&clk_lock);
clk = v4l2_clk_find(dev_name(dev), id);
clk = v4l2_clk_find(dev_name(dev));

if (!IS_ERR(clk))
atomic_inc(&clk->use_count);
Expand Down Expand Up @@ -127,8 +123,8 @@ void v4l2_clk_disable(struct v4l2_clk *clk)
mutex_lock(&clk->lock);

enable = --clk->enable;
if (WARN(enable < 0, "Unbalanced %s() on %s:%s!\n", __func__,
clk->dev_id, clk->id))
if (WARN(enable < 0, "Unbalanced %s() on %s!\n", __func__,
clk->dev_id))
clk->enable++;
else if (!enable && clk->ops->disable)
clk->ops->disable(clk);
Expand Down Expand Up @@ -181,7 +177,7 @@ EXPORT_SYMBOL(v4l2_clk_set_rate);

struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
const char *dev_id,
const char *id, void *priv)
void *priv)
{
struct v4l2_clk *clk;
int ret;
Expand All @@ -193,9 +189,8 @@ struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
if (!clk)
return ERR_PTR(-ENOMEM);

clk->id = kstrdup(id, GFP_KERNEL);
clk->dev_id = kstrdup(dev_id, GFP_KERNEL);
if ((id && !clk->id) || !clk->dev_id) {
if (!clk->dev_id) {
ret = -ENOMEM;
goto ealloc;
}
Expand All @@ -205,7 +200,7 @@ struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
mutex_init(&clk->lock);

mutex_lock(&clk_lock);
if (!IS_ERR(v4l2_clk_find(dev_id, id))) {
if (!IS_ERR(v4l2_clk_find(dev_id))) {
mutex_unlock(&clk_lock);
ret = -EEXIST;
goto eexist;
Expand All @@ -217,7 +212,6 @@ struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,

eexist:
ealloc:
kfree(clk->id);
kfree(clk->dev_id);
kfree(clk);
return ERR_PTR(ret);
Expand All @@ -227,15 +221,14 @@ EXPORT_SYMBOL(v4l2_clk_register);
void v4l2_clk_unregister(struct v4l2_clk *clk)
{
if (WARN(atomic_read(&clk->use_count),
"%s(): Refusing to unregister ref-counted %s:%s clock!\n",
__func__, clk->dev_id, clk->id))
"%s(): Refusing to unregister ref-counted %s clock!\n",
__func__, clk->dev_id))
return;

mutex_lock(&clk_lock);
list_del(&clk->list);
mutex_unlock(&clk_lock);

kfree(clk->id);
kfree(clk->dev_id);
kfree(clk);
}
Expand All @@ -253,7 +246,7 @@ static unsigned long fixed_get_rate(struct v4l2_clk *clk)
}

struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
const char *id, unsigned long rate, struct module *owner)
unsigned long rate, struct module *owner)
{
struct v4l2_clk *clk;
struct v4l2_clk_fixed *priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Expand All @@ -265,7 +258,7 @@ struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
priv->ops.get_rate = fixed_get_rate;
priv->ops.owner = owner;

clk = v4l2_clk_register(&priv->ops, dev_id, id, priv);
clk = v4l2_clk_register(&priv->ops, dev_id, priv);
if (IS_ERR(clk))
kfree(priv);

Expand Down
8 changes: 3 additions & 5 deletions include/media/v4l2-clk.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,6 @@ struct v4l2_clk {
struct list_head list;
const struct v4l2_clk_ops *ops;
const char *dev_id;
const char *id;
int enable;
struct mutex lock; /* Protect the enable count */
atomic_t use_count;
Expand All @@ -43,7 +42,7 @@ struct v4l2_clk_ops {

struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
const char *dev_name,
const char *name, void *priv);
void *priv);
void v4l2_clk_unregister(struct v4l2_clk *clk);
struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id);
void v4l2_clk_put(struct v4l2_clk *clk);
Expand All @@ -55,14 +54,13 @@ int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate);
struct module;

struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
const char *id, unsigned long rate, struct module *owner);
unsigned long rate, struct module *owner);
void v4l2_clk_unregister_fixed(struct v4l2_clk *clk);

static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
const char *id,
unsigned long rate)
{
return __v4l2_clk_register_fixed(dev_id, id, rate, THIS_MODULE);
return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE);
}

#define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \
Expand Down

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