configs: Add sam9x60ek_mmc_defconfig

[oweals/u-boot.git] / include / clk.h

diff --git a/include/clk.h b/include/clk.h
index d7b937ca7bb1af60c3fe99a329fa18f67c59f9fa..18b2e3ca54c53ab37d2ac743d9327b7c71424dc0 100644 (file)
--- a/include/clk.h
+++ b/include/clk.h
@@ -41,6 +41,9 @@ struct udevice;
  *
  * @dev: The device which implements the clock signal.
  * @rate: The clock rate (in HZ).
+ * @flags: Flags used across common clock structure (e.g. CLK_)
+ *         Clock IP blocks specific flags (i.e. mux, div, gate, etc) are defined
+ *         in struct's for those devices (e.g. struct clk_mux).
  * @id: The clock signal ID within the provider.
  * @data: An optional data field for scenarios where a single integer ID is not
  *       sufficient. If used, it can be populated through an .of_xlate op and
@@ -57,6 +60,8 @@ struct udevice;
 struct clk {
        struct udevice *dev;
        long long rate; /* in HZ */
+       u32 flags;
+       int enable_count;
        /*
         * Written by of_xlate. In the future, we might add more fields here.
         */
@@ -254,6 +259,24 @@ int clk_free(struct clk *clk);
  */
 ulong clk_get_rate(struct clk *clk);
 
+/**
+ * clk_get_parent() - Get current clock's parent.
+ *
+ * @clk:       A clock struct that was previously successfully requested by
+ *             clk_request/get_by_*().
+ * @return pointer to parent's struct clk, or error code passed as pointer
+ */
+struct clk *clk_get_parent(struct clk *clk);
+
+/**
+ * clk_get_parent_rate() - Get parent of current clock rate.
+ *
+ * @clk:       A clock struct that was previously successfully requested by
+ *             clk_request/get_by_*().
+ * @return clock rate in Hz, or -ve error code.
+ */
+long long clk_get_parent_rate(struct clk *clk);
+
 /**
  * clk_set_rate() - Set current clock rate.
  *
@@ -311,6 +334,18 @@ int clk_disable(struct clk *clk);
  */
 int clk_disable_bulk(struct clk_bulk *bulk);
 
+/**
+ * clk_is_match - check if two clk's point to the same hardware clock
+ * @p: clk compared against q
+ * @q: clk compared against p
+ *
+ * Returns true if the two struct clk pointers both point to the same hardware
+ * clock node.
+ *
+ * Returns false otherwise. Note that two NULL clks are treated as matching.
+ */
+bool clk_is_match(const struct clk *p, const struct clk *q);
+
 int soc_clk_dump(void);
 
 /**
@@ -323,4 +358,24 @@ static inline bool clk_valid(struct clk *clk)
 {
        return !!clk->dev;
 }
+
+/**
+ * clk_get_by_id() - Get the clock by its ID
+ *
+ * @id:        The clock ID to search for
+ *
+ * @clkp:      A pointer to clock struct that has been found among added clocks
+ *              to UCLASS_CLK
+ * @return zero on success, or -ENOENT on error
+ */
+int clk_get_by_id(ulong id, struct clk **clkp);
+
+/**
+ * clk_dev_binded() - Check whether the clk has a device binded
+ *
+ * @clk                A pointer to the clk
+ *
+ * @return true on binded, or false on no
+ */
+bool clk_dev_binded(struct clk *clk);
 #endif