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authorStephen Boyd <sboyd@kernel.org>2022-10-14 23:44:44 +0300
committerStephen Boyd <sboyd@kernel.org>2022-10-14 23:44:44 +0300
commita7b78befbce2e79425224d57c05275083cf7ed61 (patch)
treecbb97860541851857281ae9a4e8c446a3a2380fe /include/linux/clk-provider.h
parentc461c677a8cb19026fd06741a23ff32d0759342b (diff)
parentb05ea3314390e9cb3c27cf2928d48e38fef97050 (diff)
downloadlinux-a7b78befbce2e79425224d57c05275083cf7ed61.tar.xz
Merge branch 'clk-rate-range' into clk-next
- Various clk rate range fixes - Drop clk rate range constraints on clk_put() (redux) * clk-rate-range: (28 commits) clk: mediatek: clk-mux: Add .determine_rate() callback clk: tests: Add tests for notifiers clk: Update req_rate on __clk_recalc_rates() clk: tests: Add missing test case for ranges clk: qcom: clk-rcg2: Take clock boundaries into consideration for gfx3d clk: Introduce the clk_hw_get_rate_range function clk: Zero the clk_rate_request structure clk: Stop forwarding clk_rate_requests to the parent clk: Constify clk_has_parent() clk: Introduce clk_core_has_parent() clk: Switch from __clk_determine_rate to clk_core_round_rate_nolock clk: Add our request boundaries in clk_core_init_rate_req clk: Introduce clk_hw_init_rate_request() clk: Move clk_core_init_rate_req() from clk_core_round_rate_nolock() to its caller clk: Change clk_core_init_rate_req prototype clk: Set req_rate on reparenting clk: Take into account uncached clocks in clk_set_rate_range() clk: tests: Add some tests for orphan with multiple parents clk: tests: Add tests for mux with multiple parents clk: tests: Add tests for single parent mux ...
Diffstat (limited to 'include/linux/clk-provider.h')
-rw-r--r--include/linux/clk-provider.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2108b5695327..267cd06b54a0 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -42,6 +42,8 @@ struct dentry;
* struct clk_rate_request - Structure encoding the clk constraints that
* a clock user might require.
*
+ * Should be initialized by calling clk_hw_init_rate_request().
+ *
* @rate: Requested clock rate. This field will be adjusted by
* clock drivers according to hardware capabilities.
* @min_rate: Minimum rate imposed by clk users.
@@ -60,6 +62,15 @@ struct clk_rate_request {
struct clk_hw *best_parent_hw;
};
+void clk_hw_init_rate_request(const struct clk_hw *hw,
+ struct clk_rate_request *req,
+ unsigned long rate);
+void clk_hw_forward_rate_request(const struct clk_hw *core,
+ const struct clk_rate_request *old_req,
+ const struct clk_hw *parent,
+ struct clk_rate_request *req,
+ unsigned long parent_rate);
+
/**
* struct clk_duty - Struture encoding the duty cycle ratio of a clock
*
@@ -118,8 +129,9 @@ struct clk_duty {
*
* @recalc_rate Recalculate the rate of this clock, by querying hardware. The
* parent rate is an input parameter. It is up to the caller to
- * ensure that the prepare_mutex is held across this call.
- * Returns the calculated rate. Optional, but recommended - if
+ * ensure that the prepare_mutex is held across this call. If the
+ * driver cannot figure out a rate for this clock, it must return
+ * 0. Returns the calculated rate. Optional, but recommended - if
* this op is not set then clock rate will be initialized to 0.
*
* @round_rate: Given a target rate as input, returns the closest rate actually
@@ -1303,6 +1315,8 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
struct clk_rate_request *req,
unsigned long flags);
void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
+void clk_hw_get_rate_range(struct clk_hw *hw, unsigned long *min_rate,
+ unsigned long *max_rate);
void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate,
unsigned long max_rate);