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Fri, 5 May 2023 07:27:40 -0400 (EDT) From: Maxime Ripard Date: Fri, 05 May 2023 13:25:41 +0200 Subject: [PATCH v4 39/68] clk: versatile: sp810: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v4-39-971d5077e7d2@cerno.tech> References: <20221018-clk-range-checks-fixes-v4-0-971d5077e7d2@cerno.tech> In-Reply-To: <20221018-clk-range-checks-fixes-v4-0-971d5077e7d2@cerno.tech> To: Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, Maxime Ripard , Linus Walleij , Pawel Moll , linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1712; i=maxime@cerno.tech; h=from:subject:message-id; bh=f9fKx6fagdMn/NSMW7Lh8JOOu9FmeFzPoLjoO7VByG8=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCkhz5e0rN72n/Nt3c/nCW4LC2auu5fTPiNmZ1v+pQ4rubLt MjdjO0pZGMS4GGTFFFlihM2XxJ2a9bqTjW8ezBxWJpAhDFycAjCRZG6Gf2ZvTRh0jGoUY95H7ApdLT jBPXtvxxdz359O21nuHflx3oWR4XLpxn0FnHfve+i2nO7eIanz30dHbvcRRpa5FuuWTlinww4A X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230505_042742_800511_41E02ED8 X-CRM114-Status: GOOD ( 15.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Versatile sp810 "timerclken" clock implements a mux with a set_parent hook, but doesn't provide a determine_rate implementation. This is a bit odd, since set_parent() is there to, as its name implies, change the parent of a clock. However, the most likely candidates to trigger that parent change are either the assigned-clock-parents device tree property or a call to clk_set_rate(), with determine_rate() figuring out which parent is the best suited for a given rate. This mismatch is probably due to the fact that the driver introduction predates the determine_rate introduction, and it was never revised since then. The default, implicit, behaviour that has been in use so far has thus been to simply keep using the current parent in all cases. This is also the behaviour of the new clk_hw_determine_rate_no_reparent() helper, so we can simply use it to make our expectation explicit. Cc: Linus Walleij Cc: Pawel Moll Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Maxime Ripard Acked-by: Linus Walleij Acked-by: Pawel Moll --- drivers/clk/versatile/clk-sp810.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/versatile/clk-sp810.c b/drivers/clk/versatile/clk-sp810.c index caf0cd2fb5b6..45adac1b4630 100644 --- a/drivers/clk/versatile/clk-sp810.c +++ b/drivers/clk/versatile/clk-sp810.c @@ -63,6 +63,7 @@ static int clk_sp810_timerclken_set_parent(struct clk_hw *hw, u8 index) } static const struct clk_ops clk_sp810_timerclken_ops = { + .determine_rate = clk_hw_determine_rate_no_reparent, .get_parent = clk_sp810_timerclken_get_parent, .set_parent = clk_sp810_timerclken_set_parent, };