linux-kernel - Re: [PATCH] clocksource: timer-ti-dm: Drop bogus omap_dm_timer_of_set

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Message-ID: <7a91fcf9-68c8-91d4-e692-8f01129458dc@linaro.org>
Date:   Thu, 27 Feb 2020 10:33:23 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Suman Anna <s-anna@...com>, Tony Lindgren <tony@...mide.com>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tero Kristo <t-kristo@...com>,
        Neil Armstrong <narmstrong@...libre.com>,
        "H . Nikolaus Schaller" <hns@...delico.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Keerthy <j-keerthy@...com>,
        Ladislav Michl <ladis@...ux-mips.org>,
        Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...nel.org>
Subject: Re: [PATCH] clocksource: timer-ti-dm: Drop bogus
 omap_dm_timer_of_set_source()


Hi,

On 13/02/2020 06:35, Suman Anna wrote:
> The function omap_dm_timer_of_set_source() was originally added in
> commit 31a7448f4fa8a ("ARM: OMAP: dmtimer: Add clock source from DT"),
> and is designed to set a clock source from DT using the clocks property
> of a timer node. This design choice is okay for clk provider nodes but
> otherwise is a bad design as typically the clocks property is used to
> specify the functional clocks for a device, and not its parents.
> 
> The timer nodes now all define a timer functional clock after the
> conversion to ti-sysc and the new clkctrl layout, and this results
> in an attempt to set the same functional clock as its parent when a
> consumer driver attempts to acquire any of these timers in the
> omap_dm_timer_prepare() function. This was masked and worked around
> in commit 983a5a43ec25 ("clocksource: timer-ti-dm: Fix pwm dmtimer
> usage of fck reparenting"). Fix all of this by simply dropping the
> entire function.
> 
> Any DT configuration of clock sources should be achieved using
> assigned-clocks and assigned-clock-parents properties provided
> by the Common Clock Framework.

Applied. Thanks

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