From 7023dd1743aa6bb305fdce96e6e80eecc6e01f16 Mon Sep 17 00:00:00 2001 From: Maxime Ripard 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 # imx8mp Tested-by: Marek Szyprowski # exynos4210, meson g12b Signed-off-by: Maxime Ripard --- 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 *