netdev - Re: [PATCH 3/4] clk: x86: Stop marking clocks as CLK_IS

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Date:   Wed, 29 Aug 2018 20:46:04 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Irina Tirdea <irina.tirdea@...el.com>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Hans de Goede <hdegoede@...hat.com>, netdev@...r.kernel.org,
        Johannes Stezenbach <js@...21.net>,
        Carlo Caione <carlo@...lessm.com>, linux-clk@...r.kernel.org
Subject: Re: [PATCH 3/4] clk: x86: Stop marking clocks as CLK_IS_CRITICAL

Quoting Hans de Goede (2018-08-27 07:31:59)
> Commit d31fd43c0f9a ("clk: x86: Do not gate clocks enabled by the
> firmware"), which added the code to mark clocks as CLK_IS_CRITICAL, causes
> all unclaimed PMC clocks on Cherry Trail devices to be on all the time,
> resulting on the device not being able to reach S0i3 when suspended.
> 
> The reason for this commit is that on some Bay Trail / Cherry Trail devices
> the r8169 ethernet controller uses pmc_plt_clk_4. Now that the clk-pmc-atom
> driver exports an "ether_clk" alias for pmc_plt_clk_4 and the r8169 driver
> has been modified to get and enable this clock (if present) the marking of
> the clocks as CLK_IS_CRITICAL is no longer necessary.
> 
> This commit removes the CLK_IS_CRITICAL marking, fixing Cherry Trail
> devices not being able to reach S0i3 greatly decreasing their battery
> drain when suspended.
> 
> Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=193891#c102
> Cc: Johannes Stezenbach <js@...21.net>
> Cc: Carlo Caione <carlo@...lessm.com>
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> ---

Acked-by: Stephen Boyd <sboyd@...nel.org>