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From: Maxime Ripard <maxime@cerno.tech>
To: Mike Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	linux-clk@vger.kernel.org
Cc: Alexander Stein <alexander.stein@ew.tq-group.com>,
	Yassine Oudjana <y.oudjana@protonmail.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Naresh Kamboju <naresh.kamboju@linaro.org>,
	Tony Lindgren <tony@atomide.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Maxime Ripard <maxime@cerno.tech>
Subject: [PATCH v7 26/28] clk: Introduce the clk_hw_get_rate_range function
Date: Fri, 15 Jul 2022 18:00:12 +0200	[thread overview]
Message-ID: <20220715160014.2623107-27-maxime@cerno.tech> (raw)
In-Reply-To: <20220715160014.2623107-1-maxime@cerno.tech>

Some clock providers are hand-crafting their clk_rate_request, and need
to figure out the current boundaries of their clk_hw to fill it
properly.

Let's create such a function for clock providers.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/clk/clk.c            | 16 ++++++++++++++++
 include/linux/clk-provider.h |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 77601f435f12..5bdfd645f1dc 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -683,6 +683,22 @@ static void clk_core_get_boundaries(struct clk_core *core,
 		*max_rate = min(*max_rate, clk_user->max_rate);
 }
 
+/*
+ * clk_hw_get_rate_range() - returns the clock rate range for a hw clk
+ * @hw: the hw clk we want to get the range from
+ * @min_rate: pointer to the variable that will hold the minimum
+ * @max_rate: pointer to the variable that will hold the maximum
+ *
+ * Fills the @min_rate and @max_rate variables with the minimum and
+ * maximum that clock can reach.
+ */
+void clk_hw_get_rate_range(struct clk_hw *hw, unsigned long *min_rate,
+			   unsigned long *max_rate)
+{
+	clk_core_get_boundaries(hw->core, min_rate, max_rate);
+}
+EXPORT_SYMBOL_GPL(clk_hw_get_rate_range);
+
 static bool clk_core_check_boundaries(struct clk_core *core,
 				      unsigned long min_rate,
 				      unsigned long max_rate)
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 0bfebea2a50a..1e38886a2916 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -1233,6 +1233,8 @@ 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);
 
-- 
2.36.1


  parent reply	other threads:[~2022-07-15 16:03 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-15 15:59 [PATCH v7 00/28] clk: More clock rate fixes and tests Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 01/28] clk: bcm: rpi: Create helper to retrieve private data Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 02/28] clk: bcm: rpi: Add a function to retrieve the maximum Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 03/28] drm/vc4: hdmi: Rework hdmi_enable_4kp60 detection Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 04/28] clk: test: Switch to clk_hw_get_clk Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 05/28] clk: Drop the rate range on clk_put() Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 06/28] clk: Skip clamping when rounding if there's no boundaries Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 07/28] clk: Mention that .recalc_rate can return 0 on error Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 08/28] clk: Clarify clk_get_rate() expectations Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 09/28] clk: tests: Add test suites description Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 10/28] clk: tests: Add reference to the orphan mux bug report Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 11/28] clk: tests: Add tests for uncached clock Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 12/28] clk: tests: Add tests for single parent mux Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 13/28] clk: tests: Add tests for mux with multiple parents Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 14/28] clk: tests: Add some tests for orphan " Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 15/28] clk: Take into account uncached clocks in clk_set_rate_range() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 16/28] clk: Set req_rate on reparenting Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 17/28] clk: Change clk_core_init_rate_req prototype Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 18/28] clk: Move clk_core_init_rate_req() from clk_core_round_rate_nolock() to its caller Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 19/28] clk: Introduce clk_hw_init_rate_request() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 20/28] clk: Add our request boundaries in clk_core_init_rate_req Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 21/28] clk: Switch from __clk_determine_rate to clk_core_round_rate_nolock Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 22/28] clk: Introduce clk_core_has_parent() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 23/28] clk: Constify clk_has_parent() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 24/28] clk: Stop forwarding clk_rate_requests to the parent Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 25/28] clk: Zero the clk_rate_request structure Maxime Ripard
2022-07-15 16:00 ` Maxime Ripard [this message]
2022-07-15 16:00 ` [PATCH v7 27/28] clk: qcom: clk-rcg2: Take clock boundaries into consideration for gfx3d Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 28/28] clk: tests: Add missing test case for ranges Maxime Ripard

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