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- From 7023dd1743aa6bb305fdce96e6e80eecc6e01f16 Mon Sep 17 00:00:00 2001
- From: Maxime Ripard <[email protected]>
- Date: Sat, 2 Apr 2022 14:49:56 +0200
- Subject: [PATCH] clk: Introduce clk_hw_init_rate_request()
- Some drivers (at91, imx, qcom) use __clk_determine_rate directly, and
- thus will need to initialise a clk_rate_request structure.
- However, drivers don't have access to the function that the core uses to
- initialize that structure which could prove to be useful.
- Let's create a function for clock providers that will initialize a
- clk_rate_request for a given clk_hw pointer and a rate.
- Tested-by: Alexander Stein <[email protected]> # imx8mp
- Tested-by: Marek Szyprowski <[email protected]> # exynos4210, meson g12b
- Signed-off-by: Maxime Ripard <[email protected]>
- ---
- drivers/clk/clk.c | 20 ++++++++++++++++++++
- include/linux/clk-provider.h | 6 ++++++
- 2 files changed, 26 insertions(+)
- --- a/drivers/clk/clk.c
- +++ b/drivers/clk/clk.c
- @@ -1394,6 +1394,26 @@ static void clk_core_init_rate_req(struc
- }
- }
-
- +/**
- + * clk_hw_init_rate_request - Initializes a clk_rate_request
- + * @hw: the clk for which we want to submit a rate request
- + * @req: the clk_rate_request structure we want to initialise
- + * @rate: the rate which is to be requested
- + *
- + * Initializes and fills a clk_rate_request structure to submit to
- + * __clk_determine_rate or similar functions.
- + */
- +void clk_hw_init_rate_request(struct clk_hw * const hw,
- + struct clk_rate_request *req,
- + unsigned long rate)
- +{
- + if (WARN_ON(!hw || !req))
- + return;
- +
- + clk_core_init_rate_req(hw->core, req, rate);
- +}
- +EXPORT_SYMBOL_GPL(clk_hw_init_rate_request);
- +
- static bool clk_core_can_round(struct clk_core * const core)
- {
- return core->ops->determine_rate || core->ops->round_rate;
- --- 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 +62,10 @@ struct clk_rate_request {
- struct clk_hw *best_parent_hw;
- };
-
- +void clk_hw_init_rate_request(struct clk_hw * const hw,
- + struct clk_rate_request *req,
- + unsigned long rate);
- +
- /**
- * struct clk_duty - Struture encoding the duty cycle ratio of a clock
- *
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