29 	struct v4l2_clk *clk;  in v4l2_clk_find()  local
31 	list_for_each_entry(clk, &clk_list, list)  in v4l2_clk_find()
32 		if (!strcmp(dev_id, clk->dev_id))  in v4l2_clk_find()
33 			return clk;  in v4l2_clk_find()
40 	struct v4l2_clk *clk;  in v4l2_clk_get()  local
41 	struct clk *ccf_clk = clk_get(dev, id);  in v4l2_clk_get()
47 		clk = kzalloc(sizeof(*clk), GFP_KERNEL);  in v4l2_clk_get()
48 		if (!clk) {  in v4l2_clk_get()
52 		clk->clk = ccf_clk;  in v4l2_clk_get()
54 		return clk;  in v4l2_clk_get()
58 	clk = v4l2_clk_find(dev_name(dev));  in v4l2_clk_get()
60 	if (!IS_ERR(clk))  in v4l2_clk_get()
61 		atomic_inc(&clk->use_count);  in v4l2_clk_get()
64 	return clk;  in v4l2_clk_get()
68 void v4l2_clk_put(struct v4l2_clk *clk)  in v4l2_clk_put()  argument
72 	if (IS_ERR(clk))  in v4l2_clk_put()
75 	if (clk->clk) {  in v4l2_clk_put()
76 		clk_put(clk->clk);  in v4l2_clk_put()
77 		kfree(clk);  in v4l2_clk_put()
84 		if (tmp == clk)  in v4l2_clk_put()
85 			atomic_dec(&clk->use_count);  in v4l2_clk_put()
91 static int v4l2_clk_lock_driver(struct v4l2_clk *clk)  in v4l2_clk_lock_driver()  argument
99 		if (tmp == clk) {  in v4l2_clk_lock_driver()
100 			ret = !try_module_get(clk->ops->owner);  in v4l2_clk_lock_driver()
111 static void v4l2_clk_unlock_driver(struct v4l2_clk *clk)  in v4l2_clk_unlock_driver()  argument
113 	module_put(clk->ops->owner);  in v4l2_clk_unlock_driver()
116 int v4l2_clk_enable(struct v4l2_clk *clk)  in v4l2_clk_enable()  argument
120 	if (clk->clk)  in v4l2_clk_enable()
121 		return clk_prepare_enable(clk->clk);  in v4l2_clk_enable()
123 	ret = v4l2_clk_lock_driver(clk);  in v4l2_clk_enable()
127 	mutex_lock(&clk->lock);  in v4l2_clk_enable()
129 	if (++clk->enable == 1 && clk->ops->enable) {  in v4l2_clk_enable()
130 		ret = clk->ops->enable(clk);  in v4l2_clk_enable()
132 			clk->enable--;  in v4l2_clk_enable()
135 	mutex_unlock(&clk->lock);  in v4l2_clk_enable()
145 void v4l2_clk_disable(struct v4l2_clk *clk)  in v4l2_clk_disable()  argument
149 	if (clk->clk)  in v4l2_clk_disable()
150 		return clk_disable_unprepare(clk->clk);  in v4l2_clk_disable()
152 	mutex_lock(&clk->lock);  in v4l2_clk_disable()
154 	enable = --clk->enable;  in v4l2_clk_disable()
156 		 clk->dev_id))  in v4l2_clk_disable()
157 		clk->enable++;  in v4l2_clk_disable()
158 	else if (!enable && clk->ops->disable)  in v4l2_clk_disable()
159 		clk->ops->disable(clk);  in v4l2_clk_disable()
161 	mutex_unlock(&clk->lock);  in v4l2_clk_disable()
163 	v4l2_clk_unlock_driver(clk);  in v4l2_clk_disable()
167 unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk)  in v4l2_clk_get_rate()  argument
171 	if (clk->clk)  in v4l2_clk_get_rate()
172 		return clk_get_rate(clk->clk);  in v4l2_clk_get_rate()
174 	ret = v4l2_clk_lock_driver(clk);  in v4l2_clk_get_rate()
178 	mutex_lock(&clk->lock);  in v4l2_clk_get_rate()
179 	if (!clk->ops->get_rate)  in v4l2_clk_get_rate()
182 		ret = clk->ops->get_rate(clk);  in v4l2_clk_get_rate()
183 	mutex_unlock(&clk->lock);  in v4l2_clk_get_rate()
185 	v4l2_clk_unlock_driver(clk);  in v4l2_clk_get_rate()
191 int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate)  in v4l2_clk_set_rate()  argument
195 	if (clk->clk) {  in v4l2_clk_set_rate()
196 		long r = clk_round_rate(clk->clk, rate);  in v4l2_clk_set_rate()
199 		return clk_set_rate(clk->clk, r);  in v4l2_clk_set_rate()
202 	ret = v4l2_clk_lock_driver(clk);  in v4l2_clk_set_rate()
207 	mutex_lock(&clk->lock);  in v4l2_clk_set_rate()
208 	if (!clk->ops->set_rate)  in v4l2_clk_set_rate()
211 		ret = clk->ops->set_rate(clk, rate);  in v4l2_clk_set_rate()
212 	mutex_unlock(&clk->lock);  in v4l2_clk_set_rate()
214 	v4l2_clk_unlock_driver(clk);  in v4l2_clk_set_rate()
224 	struct v4l2_clk *clk;  in v4l2_clk_register()  local
230 	clk = kzalloc(sizeof(struct v4l2_clk), GFP_KERNEL);  in v4l2_clk_register()
231 	if (!clk)  in v4l2_clk_register()
234 	clk->dev_id = kstrdup(dev_id, GFP_KERNEL);  in v4l2_clk_register()
235 	if (!clk->dev_id) {  in v4l2_clk_register()
239 	clk->ops = ops;  in v4l2_clk_register()
240 	clk->priv = priv;  in v4l2_clk_register()
241 	atomic_set(&clk->use_count, 0);  in v4l2_clk_register()
242 	mutex_init(&clk->lock);  in v4l2_clk_register()
250 	list_add_tail(&clk->list, &clk_list);  in v4l2_clk_register()
253 	return clk;  in v4l2_clk_register()
257 	kfree(clk->dev_id);  in v4l2_clk_register()
258 	kfree(clk);  in v4l2_clk_register()
263 void v4l2_clk_unregister(struct v4l2_clk *clk)  in v4l2_clk_unregister()  argument
265 	if (WARN(atomic_read(&clk->use_count),  in v4l2_clk_unregister()
267 		 __func__, clk->dev_id))  in v4l2_clk_unregister()
271 	list_del(&clk->list);  in v4l2_clk_unregister()
274 	kfree(clk->dev_id);  in v4l2_clk_unregister()
275 	kfree(clk);  in v4l2_clk_unregister()
284 static unsigned long fixed_get_rate(struct v4l2_clk *clk)  in fixed_get_rate()  argument
286 	struct v4l2_clk_fixed *priv = clk->priv;  in fixed_get_rate()
293 	struct v4l2_clk *clk;  in __v4l2_clk_register_fixed()  local
303 	clk = v4l2_clk_register(&priv->ops, dev_id, priv);  in __v4l2_clk_register_fixed()
304 	if (IS_ERR(clk))  in __v4l2_clk_register_fixed()
307 	return clk;  in __v4l2_clk_register_fixed()
311 void v4l2_clk_unregister_fixed(struct v4l2_clk *clk)  in v4l2_clk_unregister_fixed()  argument
313 	kfree(clk->priv);  in v4l2_clk_unregister_fixed()
314 	v4l2_clk_unregister(clk);  in v4l2_clk_unregister_fixed()