#define _CLK_H_
#include <dm/ofnode.h>
+#include <linux/err.h>
#include <linux/errno.h>
#include <linux/types.h>
struct phandle_1_arg *cells, struct clk *clk);
/**
- * clock_get_by_index - Get/request a clock by integer index.
+ * clk_get_by_index - Get/request a clock by integer index.
*
* This looks up and requests a clock. The index is relative to the client
* device; each device is assumed to have n clocks associated with it somehow,
int clk_get_by_index(struct udevice *dev, int index, struct clk *clk);
/**
- * clock_get_by_index_nodev - Get/request a clock by integer index
+ * clk_get_by_index_nodev - Get/request a clock by integer index
* without a device.
*
* This is a version of clk_get_by_index() that does not use a device.
int clk_get_by_index_nodev(ofnode node, int index, struct clk *clk);
/**
- * clock_get_bulk - Get/request all clocks of a device.
+ * clk_get_bulk - Get/request all clocks of a device.
*
* This looks up and requests all clocks of the client device; each device is
* assumed to have n clocks associated with it somehow, and this function finds
int clk_get_bulk(struct udevice *dev, struct clk_bulk *bulk);
/**
- * clock_get_by_name - Get/request a clock by name.
+ * clk_get_by_name - Get/request a clock by name.
*
* This looks up and requests a clock. The name is relative to the client
* device; each device is assumed to have n clocks associated with it somehow,
*/
int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
+/**
+ * clk_get_by_name_nodev - Get/request a clock by name without a device.
+ *
+ * This is a version of clk_get_by_name() that does not use a device.
+ *
+ * @node: The client ofnode.
+ * @name: The name of the clock to request, within the client's list of
+ * clocks.
+ * @clock: A pointer to a clock struct to initialize.
+ * @return 0 if OK, or a negative error code.
+ */
+int clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk);
+
+/**
+ * clk_get_optional_nodev - Get/request an optinonal clock by name
+ * without a device.
+ * @node: The client ofnode.
+ * @name: The name of the clock to request.
+ * @name: The name of the clock to request, within the client's list of
+ * clocks.
+ * @clock: A pointer to a clock struct to initialize.
+ *
+ * Behaves the same as clk_get_by_name_nodev() except where there is
+ * no clock producer, in this case, skip the error number -ENODATA, and
+ * the function returns 0.
+ */
+int clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk);
+
+/**
+ * devm_clk_get - lookup and obtain a managed reference to a clock producer.
+ * @dev: device for clock "consumer"
+ * @id: clock consumer ID
+ *
+ * Returns a struct clk corresponding to the clock producer, or
+ * valid IS_ERR() condition containing errno. The implementation
+ * uses @dev and @id to determine the clock consumer, and thereby
+ * the clock producer. (IOW, @id may be identical strings, but
+ * clk_get may return different clock producers depending on @dev.)
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * devm_clk_get should not be called from within interrupt context.
+ *
+ * The clock will automatically be freed when the device is unbound
+ * from the bus.
+ */
+struct clk *devm_clk_get(struct udevice *dev, const char *id);
+
+/**
+ * devm_clk_get_optional - lookup and obtain a managed reference to an optional
+ * clock producer.
+ * @dev: device for clock "consumer"
+ * @id: clock consumer ID
+ *
+ * Behaves the same as devm_clk_get() except where there is no clock producer.
+ * In this case, instead of returning -ENOENT, the function returns NULL.
+ */
+struct clk *devm_clk_get_optional(struct udevice *dev, const char *id);
+
/**
* clk_release_all() - Disable (turn off)/Free an array of previously
* requested clocks.
*/
int clk_release_all(struct clk *clk, int count);
+/**
+ * devm_clk_put - "free" a managed clock source
+ * @dev: device used to acquire the clock
+ * @clk: clock source acquired with devm_clk_get()
+ *
+ * Note: drivers must ensure that all clk_enable calls made on this
+ * clock source are balanced by clk_disable calls prior to calling
+ * this function.
+ *
+ * clk_put should not be called from within interrupt context.
+ */
+void devm_clk_put(struct udevice *dev, struct clk *clk);
+
#else
static inline int clk_get_by_index(struct udevice *dev, int index,
struct clk *clk)
return -ENOSYS;
}
+static inline int
+clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk)
+{
+ return -ENOSYS;
+}
+
+static inline int
+clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk)
+{
+ return -ENOSYS;
+}
+
static inline int clk_release_all(struct clk *clk, int count)
{
return -ENOSYS;
*
* @dev: A device to process (the ofnode associated with this device
* will be processed).
+ * @stage: A integer. 0 indicates that this is called before the device
+ * is probed. 1 indicates that this is called just after the
+ * device has been probed
*/
-int clk_set_defaults(struct udevice *dev);
+int clk_set_defaults(struct udevice *dev, int stage);
#else
-static inline int clk_set_defaults(struct udevice *dev)
+static inline int clk_set_defaults(struct udevice *dev, int stage)
{
return 0;
}
return clk_release_all(bulk->clks, bulk->count);
}
+#if CONFIG_IS_ENABLED(CLK)
/**
* clk_request - Request a clock by provider-specific ID.
*
int clk_request(struct udevice *dev, struct clk *clk);
/**
- * clock_free - Free a previously requested clock.
+ * clk_free - Free a previously requested clock.
*
* @clock: A clock struct that was previously successfully requested by
* clk_request/get_by_*().
*/
bool clk_is_match(const struct clk *p, const struct clk *q);
-int soc_clk_dump(void);
-
-/**
- * clk_valid() - check if clk is valid
- *
- * @clk: the clock to check
- * @return true if valid, or false
- */
-static inline bool clk_valid(struct clk *clk)
-{
- return !!clk->dev;
-}
-
/**
* clk_get_by_id() - Get the clock by its ID
*
* @return true on binded, or false on no
*/
bool clk_dev_binded(struct clk *clk);
+
+#else /* CONFIG_IS_ENABLED(CLK) */
+
+static inline int clk_request(struct udevice *dev, struct clk *clk)
+{
+ return -ENOSYS;
+}
+
+static inline int clk_free(struct clk *clk)
+{
+ return 0;
+}
+
+static inline ulong clk_get_rate(struct clk *clk)
+{
+ return -ENOSYS;
+}
+
+static inline struct clk *clk_get_parent(struct clk *clk)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline long long clk_get_parent_rate(struct clk *clk)
+{
+ return -ENOSYS;
+}
+
+static inline ulong clk_set_rate(struct clk *clk, ulong rate)
+{
+ return -ENOSYS;
+}
+
+static inline int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ return -ENOSYS;
+}
+
+static inline int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+static inline int clk_enable_bulk(struct clk_bulk *bulk)
+{
+ return 0;
+}
+
+static inline int clk_disable(struct clk *clk)
+{
+ return 0;
+}
+
+static inline int clk_disable_bulk(struct clk_bulk *bulk)
+{
+ return 0;
+}
+
+static inline bool clk_is_match(const struct clk *p, const struct clk *q)
+{
+ return false;
+}
+
+static inline int clk_get_by_id(ulong id, struct clk **clkp)
+{
+ return -ENOSYS;
+}
+
+static inline bool clk_dev_binded(struct clk *clk)
+{
+ return false;
+}
+#endif /* CONFIG_IS_ENABLED(CLK) */
+
+/**
+ * clk_valid() - check if clk is valid
+ *
+ * @clk: the clock to check
+ * @return true if valid, or false
+ */
+static inline bool clk_valid(struct clk *clk)
+{
+ return clk && !!clk->dev;
+}
+
+int soc_clk_dump(void);
+
#endif
+
+#define clk_prepare_enable(clk) clk_enable(clk)
+#define clk_disable_unprepare(clk) clk_disable(clk)
projects / oweals / u-boot.git / blobdiff