linux-kernel - Re: [PATCH V5] clk: bcm: Add driver for BCM53573 ILP clock

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Message-ID: <CACna6rzUc2Gz2JJdTC_S3+Fo24X4rTisxRz7-THvnyCt5rk4Xw@mail.gmail.com>
Date:   Thu, 25 Aug 2016 16:11:40 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Eric Anholt <eric@...olt.net>,
        Jon Mason <jonmason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Stephen Warren <swarren@...dotorg.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V5] clk: bcm: Add driver for BCM53573 ILP clock

On 24 August 2016 at 10:47, Stephen Boyd <sboyd@...eaurora.org> wrote:
> On 08/23, Rafał Miłecki wrote:
>> +static int bcm53573_ilp_enable(struct clk_hw *hw)
>> +{
>> +     struct bcm53573_ilp *ilp = container_of(hw, struct bcm53573_ilp, hw);
>> +
>> +     writel(0x10199, ilp->pmu + PMU_SLOW_CLK_PERIOD);
>> +     writel(0x10000, ilp->pmu + 0x674);
>
> Is there a name for 0x674?

No in any sources published by Broadcom. I was experimenting with bit
0x10000 in PMU_SLOW_CLK_PERIOD and 0x10000 in 0x674. Both have to be
set. I was suspecting that maybe one of them is just some trigger and
it can be switched back to 0, but it's not the case. I definitely need
to set both of them to get clock working.