video: Convert CONFIG_VIDEO_LOGO to Kconfig

[platform/kernel/u-boot.git] / include / clk.h

diff --git a/include/clk.h b/include/clk.h
index f34401f..df5255e 100644 (file)
--- a/include/clk.h
+++ b/include/clk.h
@@ -89,11 +89,36 @@ struct clk_bulk {
 
 #if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(CLK)
 struct phandle_1_arg;
-int clk_get_by_driver_info(struct udevice *dev,
-                          struct phandle_1_arg *cells, struct clk *clk);
+/**
+ * clk_get_by_phandle() - Get a clock by its phandle information (of-platadata)
+ *
+ * This function is used when of-platdata is enabled.
+ *
+ * This looks up a clock using the phandle info. With dtoc, each phandle in the
+ * 'clocks' property is transformed into an idx representing the device. For
+ * example:
+ *
+ *     clocks = <&dpll_mpu_ck 23>;
+ *
+ * might result in:
+ *
+ *     .clocks = {1, {23}},},
+ *
+ * indicating that the clock is udevice idx 1 in dt-plat.c with an argument of
+ * 23. This function can return a valid clock given the above information. In
+ * this example it would return a clock containing the 'dpll_mpu_ck' device and
+ * the clock ID 23.
+ *
+ * @dev: Device containing the phandle
+ * @cells: Phandle info
+ * @clock: A pointer to a clock struct to initialise
+ * @return 0 if OK, or a negative error code.
+ */
+int clk_get_by_phandle(struct udevice *dev, const struct phandle_1_arg *cells,
+                      struct clk *clk);
 
 /**
- * clk_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,
@@ -364,7 +389,8 @@ int clk_free(struct clk *clk);
  *
  * @clk:       A clock struct that was previously successfully requested by
  *             clk_request/get_by_*().
- * @return clock rate in Hz, or -ve error code.
+ * @return clock rate in Hz on success, 0 for invalid clock, or -ve error code
+ *        for other errors.
  */
 ulong clk_get_rate(struct clk *clk);