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clk: add clk_determine_rate_noop()

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Add a new helper clk_determine_rate_noop() that's for clocks where the
rate rounding is handled by the firmware/hardware, or the clock is
capable of any rate. The requested rate is passed through unchanged,
and the actual rate will be learned via recalc_rate() after the rate
is set.

This shared helper will be used to get rid of the driver-specific empty
determine rate implementations that are present in the tree.

Signed-off-by: Brian Masney <bmasney@redhat.com>
This commit is contained in:
Brian Masney 2026-05-05 20:48:58 -04:00
parent 5f2db1ce20
commit 862e0773f1
2 changed files with 19 additions and 0 deletions
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18
drivers/clk/clk.c
View File

@ -933,6 +933,24 @@ int clk_hw_determine_rate_no_reparent(struct clk_hw *hw,
}
EXPORT_SYMBOL_GPL(clk_hw_determine_rate_no_reparent);
/**
* clk_determine_rate_noop - clk_ops::determine_rate noop implementation
* @hw: clk to determine rate on
* @req: rate request
*
* Noop determine rate for clocks where the rate rounding is handled by the
* firmware/hardware, or the clock is capable of any rate. The requested rate is
* passed through unchanged, and the actual rate will be learned via
* recalc_rate() after the rate is set.
*
* Returns: 0 always
*/
int clk_determine_rate_noop(struct clk_hw *hw, struct clk_rate_request *req)
{
return 0;
}
EXPORT_SYMBOL_GPL(clk_determine_rate_noop);
/*** clk api ***/
static void clk_core_rate_unprotect(struct clk_core *core)

1
include/linux/clk-provider.h
View File

@ -1472,6 +1472,7 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
unsigned long flags);
int clk_hw_determine_rate_no_reparent(struct clk_hw *hw,
struct clk_rate_request *req);
int clk_determine_rate_noop(struct clk_hw *hw, struct clk_rate_request *req);
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);