clk: fixed-rate: Add clk flags for parent accuracy

Some clk providers want to use the accuracy of the parent clk and use the fixed rate basic type clk to do that. This requires getting the parent clk and extracting the accuracy before registering the fixed rate clk. Let's add a flag for this and update the clk_ops to support this.

Stephen Boyd committed 7 years ago

Commit 58f0c4b1 parent 2d34f092 files · +12 −1Browse files

Showing the changes to include/linux (1 of 2 files). Show all

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include/linux/clk-provider.h+6−0

@@ -323,6 +323,10 @@ struct clk_hw { · 322 unmodified lines
323	323	* @fixed_rate: constant frequency of clock
324	324	* @fixed_accuracy: constant accuracy of clock in ppb (parts per billion)
325	325	* @flags: hardware specific flags
	326	+ *
	327	+ * Flags:
	328	+ * * CLK_FIXED_RATE_PARENT_ACCURACY - Use the accuracy of the parent clk
	329	+ * instead of what's set in @fixed_accuracy.
326	330	*/
327	331	struct clk_fixed_rate {
328	332	struct clk_hw hw;
@@ -331,6 +335,8 @@ struct clk_fixed_rate { · 2 unmodified lines
331	335	unsigned long flags;
332	336	};
333	337
	338	+#define CLK_FIXED_RATE_PARENT_ACCURACY BIT(0)
	339	+
334	340	extern const struct clk_ops clk_fixed_rate_ops;
335	341	struct clk_hw __clk_hw_register_fixed_rate(struct device dev,
336	342	struct device_node np, const char name,