linux-kernel - Re: [PATCH v8 4/5] platform/x86: Enable Atom PMC platform clocks

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Date:   Mon, 10 Jul 2017 12:19:23 +0200
From:   Enric Balletbo Serra <eballetbo@...il.com>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        linux-clk@...r.kernel.org, x86@...nel.org,
        platform-driver-x86@...r.kernel.org,
        Darren Hart <dvhart@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        alsa-devel@...a-project.org, Irina Tirdea <irina.tirdea@...el.com>,
        Michael Turquette <mturquette@...libre.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Takashi Iwai <tiwai@...e.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-acpi@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Mark Brown <broonie@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>, Len Brown <lenb@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Vinod Koul <vinod.koul@...el.com>
Subject: Re: [PATCH v8 4/5] platform/x86: Enable Atom PMC platform clocks

Hi all,

2017-01-27 1:23 GMT+01:00 Stephen Boyd <sboyd@...eaurora.org>:
> On 01/23, Pierre-Louis Bossart wrote:
>> From: Irina Tirdea <irina.tirdea@...el.com>
>>
>> The BayTrail and CherryTrail platforms provide platform clocks
>> through their Power Management Controller (PMC).
>>
>> The SoC supports up to 6 clocks (PMC_PLT_CLK[0..5]) with a
>> frequency of either 19.2 MHz (PLL) or 25 MHz (XTAL) for BayTrail
>> and a frequency of 19.2 MHz (XTAL) for CherryTrail. These clocks
>> are available for general system use, where appropriate. For example,
>> the usage for platform clocks suggested in the datasheet is the
>> following:
>>   PLT_CLK[0..2] - Camera
>>   PLT_CLK[3] - Audio Codec
>>   PLT_CLK[4] -
>>   PLT_CLK[5] - COMMs
>>
>> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
>> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
>> ---
>
> Applied to clk-next
>

I just noticed that I need to revert this patch on kernel 4.12 to get
audio working again on my Acer C200 (Baytrail). Any clue on what could
be wrong?

Thanks in advance,
 Enric


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