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73 lines
2.0 KiB
73 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* V4L2 clock service |
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* |
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* Copyright (C) 2012-2013, Guennadi Liakhovetski <[email protected]> |
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* |
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* ATTENTION: This is a temporary API and it shall be replaced by the generic |
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* clock API, when the latter becomes widely available. |
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*/ |
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#ifndef MEDIA_V4L2_CLK_H |
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#define MEDIA_V4L2_CLK_H |
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#include <linux/atomic.h> |
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#include <linux/export.h> |
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#include <linux/list.h> |
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#include <linux/mutex.h> |
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struct module; |
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struct device; |
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struct clk; |
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struct v4l2_clk { |
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struct list_head list; |
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const struct v4l2_clk_ops *ops; |
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const char *dev_id; |
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int enable; |
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struct mutex lock; /* Protect the enable count */ |
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atomic_t use_count; |
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struct clk *clk; |
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void *priv; |
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}; |
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struct v4l2_clk_ops { |
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struct module *owner; |
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int (*enable)(struct v4l2_clk *clk); |
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void (*disable)(struct v4l2_clk *clk); |
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unsigned long (*get_rate)(struct v4l2_clk *clk); |
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int (*set_rate)(struct v4l2_clk *clk, unsigned long); |
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}; |
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struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops, |
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const char *dev_name, |
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void *priv); |
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void v4l2_clk_unregister(struct v4l2_clk *clk); |
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struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id); |
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void v4l2_clk_put(struct v4l2_clk *clk); |
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int v4l2_clk_enable(struct v4l2_clk *clk); |
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void v4l2_clk_disable(struct v4l2_clk *clk); |
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unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk); |
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int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate); |
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struct module; |
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struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id, |
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unsigned long rate, struct module *owner); |
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void v4l2_clk_unregister_fixed(struct v4l2_clk *clk); |
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static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id, |
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unsigned long rate) |
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{ |
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return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE); |
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} |
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#define V4L2_CLK_NAME_SIZE 64 |
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#define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \ |
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"%d-%04x", adap, client) |
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#define v4l2_clk_name_of(name, size, node) snprintf(name, size, \ |
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"of-%pOF", node) |
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#endif
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