From: Mark Brown <broonie@kernel.org>
To: Maxime Ripard <maxime@cerno.tech>
Cc: "Stephen Boyd" <sboyd@kernel.org>,
"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
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Subject: Re: [PATCH v2 43/65] ASoC: tlv320aic32x4: Add a determine_rate hook
Date: Fri, 4 Nov 2022 15:44:53 +0000 [thread overview]
Message-ID: <Y2UzdYyjgahJsbHg@sirena.org.uk> (raw)
In-Reply-To: <20221018-clk-range-checks-fixes-v2-43-f6736dec138e@cerno.tech>
[-- Attachment #1: Type: text/plain, Size: 1313 bytes --]
On Fri, Nov 04, 2022 at 02:18:00PM +0100, Maxime Ripard wrote:
> So, the set_parent hook is effectively unused, possibly because of an
> oversight. However, it could also be an explicit decision by the
> original author to avoid any reparenting but through an explicit call to
> clk_set_parent().
> The latter case would be equivalent to setting the flag
> CLK_SET_RATE_NO_REPARENT, together with setting our determine_rate hook
> to __clk_mux_determine_rate(). Indeed, if no determine_rate
> implementation is provided, clk_round_rate() (through
> clk_core_round_rate_nolock()) will call itself on the parent if
> CLK_SET_RATE_PARENT is set, and will not change the clock rate
> otherwise. __clk_mux_determine_rate() has the exact same behavior when
> CLK_SET_RATE_NO_REPARENT is set.
> And if it was an oversight, then we are at least explicit about our
> behavior now and it can be further refined down the line.
Given that the current approach involves patching every single user to
set a default implementation it feels like it might be more
straightforward to just have the clock API use that implementation if
none is defined - as you say there's already a flag to indicate the
unusual case where there's a solid reason to prevent reparenting. It
feels like the resulting API is more straightforward.
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next prev parent reply other threads:[~2022-11-04 15:45 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221018-clk-range-checks-fixes-v2-0-f6736dec138e@cerno.tech>
[not found] ` <20221018-clk-range-checks-fixes-v2-56-f6736dec138e@cerno.tech>
2022-11-04 14:31 ` [PATCH v2 56/65] clk: ingenic: cgu: Switch to determine_rate Paul Cercueil
2022-11-04 14:59 ` Maxime Ripard
2022-11-04 17:35 ` Aidan MacDonald
2022-11-07 8:54 ` Maxime Ripard
2022-11-07 20:57 ` Aidan MacDonald
2022-11-09 11:00 ` Maxime Ripard
[not found] ` <06a293adc75990ed3e297b076fc38d8a.sboyd@kernel.org>
2023-03-23 15:35 ` Aidan MacDonald
2023-03-24 11:19 ` Maxime Ripard
2023-03-24 20:58 ` Aidan MacDonald
2023-03-27 19:24 ` Maxime Ripard
2023-04-05 12:57 ` Paul Cercueil
2023-04-05 14:50 ` Maxime Ripard
2023-04-05 15:29 ` Paul Cercueil
2022-11-05 10:33 ` Paul Cercueil
2022-11-09 10:53 ` Maxime Ripard
2022-11-09 11:36 ` Paul Cercueil
[not found] ` <20221018-clk-range-checks-fixes-v2-43-f6736dec138e@cerno.tech>
2022-11-04 15:44 ` Mark Brown [this message]
2022-11-04 15:51 ` [PATCH v2 43/65] ASoC: tlv320aic32x4: Add a determine_rate hook Maxime Ripard
2022-11-04 15:59 ` Mark Brown
2022-11-07 8:43 ` Maxime Ripard
2022-11-07 12:06 ` Mark Brown
2022-11-07 15:26 ` Maxime Ripard
2022-11-07 16:02 ` Mark Brown
[not found] ` <5819b1362f35ce306e1b6d566bfd44e5.sboyd@kernel.org>
2023-03-29 19:50 ` Maxime Ripard
[not found] ` <20221018-clk-range-checks-fixes-v2-21-f6736dec138e@cerno.tech>
2022-11-04 16:45 ` [PATCH v2 21/65] clk: davinci: da8xx-cfgchip: " David Lechner
2022-11-07 12:06 ` Maxime Ripard
2022-11-07 14:52 ` David Lechner
[not found] ` <20221018-clk-range-checks-fixes-v2-22-f6736dec138e@cerno.tech>
2022-11-04 16:46 ` [PATCH v2 22/65] " David Lechner
[not found] ` <20221018-clk-range-checks-fixes-v2-54-f6736dec138e@cerno.tech>
2022-11-04 16:49 ` [PATCH v2 54/65] clk: da8xx: clk48: Switch to determine_rate David Lechner
2022-11-07 14:52 ` Maxime Ripard
[not found] ` <20221018-clk-range-checks-fixes-v2-28-f6736dec138e@cerno.tech>
2022-11-07 7:51 ` [PATCH v2 28/65] clk: renesas: r9a06g032: Add a determine_rate hook Geert Uytterhoeven
[not found] ` <20221018-clk-range-checks-fixes-v2-65-f6736dec138e@cerno.tech>
2022-11-07 10:56 ` [PATCH v2 65/65] clk: Warn if we register a mux without determine_rate Charles Keepax
[not found] ` <20221018-clk-range-checks-fixes-v2-20-f6736dec138e@cerno.tech>
2022-11-07 10:58 ` [PATCH v2 20/65] clk: wm831x: clkout: Add a determine_rate hook Charles Keepax
[not found] ` <20221018-clk-range-checks-fixes-v2-34-f6736dec138e@cerno.tech>
2022-11-08 13:25 ` [PATCH v2 34/65] clk: ux500: prcmu: " Linus Walleij
2022-11-09 11:05 ` Maxime Ripard
[not found] ` <20221018-clk-range-checks-fixes-v2-35-f6736dec138e@cerno.tech>
2022-11-08 13:27 ` [PATCH v2 35/65] clk: ux500: sysctrl: " Linus Walleij
2022-11-10 11:28 ` Ulf Hansson
2022-11-10 11:39 ` Linus Walleij
2022-11-10 13:05 ` Ulf Hansson
2022-11-11 9:20 ` Linus Walleij
2022-11-14 9:05 ` Lee Jones
[not found] ` <20221018-clk-range-checks-fixes-v2-58-f6736dec138e@cerno.tech>
2022-11-09 2:43 ` [PATCH v2 58/65] clk: sprd: composite: Switch to determine_rate Chunyan Zhang
[not found] ` <20221018-clk-range-checks-fixes-v2-13-f6736dec138e@cerno.tech>
2022-11-13 22:35 ` [PATCH v2 13/65] clk: lmk04832: clkout: Add a determine_rate hook Liam Beguin
[not found] ` <f804380a14c346fdbbf3286bcb40b3c2.sboyd@kernel.org>
2023-03-22 10:01 ` [PATCH v2 00/65] clk: Make determine_rate mandatory for muxes Maxime Ripard
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