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From: Stephen Boyd <sboyd@codeaurora.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Michael Turquette <mturquette@baylibre.com>, linux-clk@vger.kernel.org
Subject: Re: [PATCH 2/2 v3] clk: qcom: Implement RPM clocks for MSM8660/APQ8060
Date: Wed, 1 Nov 2017 23:49:38 -0700	[thread overview]
Message-ID: <20171102064938.GH30645@codeaurora.org> (raw)
In-Reply-To: <20171013115917.9318-2-linus.walleij@linaro.org>

On 10/13, Linus Walleij wrote:
> The RPM clocks were missing for MSM8660/APQ8060. For this to be
> completed we need to add a special fixed rate RPM clock that is used
> for the PLL4 on these SoCs. The rest of the clocks are pretty
> similar to the other supported platforms.
> 
> The "active" clock pattern is mirrored in all the clocks. I guess
> that the PLL4 that clocks the LPASS is actually never used as
> "active only" since the low-power audio subsystem should be left
> on when the CPU goes to idle, so that it can be used as a stand-alone
> MP3 player type of device.
> 
> The PLL4 seems to be enabled only on behalf of the booting LPASS
> Hexagon - which will cast its own vote once its booted - and as
> such we only configure the active state (meaning both states will
> have same configuration). The result is that PLL4 will be on
> from prepare() to unprepare() regardless of what the application
> CPU does.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---

Applied to clk-next

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2017-11-02  6:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-13 11:59 [PATCH 1/2 v3] clk: qcom: Update DT bindings for the MSM8660/APQ8060 RPMCC Linus Walleij
2017-10-13 11:59 ` [PATCH 2/2 v3] clk: qcom: Implement RPM clocks for MSM8660/APQ8060 Linus Walleij
2017-10-30 14:21   ` Linus Walleij
2017-11-02  6:49   ` Stephen Boyd [this message]
2017-10-30 14:20 ` [PATCH 1/2 v3] clk: qcom: Update DT bindings for the MSM8660/APQ8060 RPMCC Linus Walleij
2017-11-02  6:49 ` Stephen Boyd
2017-11-02  6:49   ` Stephen Boyd

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