From: Doug Anderson <dianders@chromium.org>
To: Taniya Das <tdas@codeaurora.org>
Cc: Stephen Boyd <sboyd@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
David Brown <david.brown@linaro.org>,
Rajendra Nayak <rnayak@codeaurora.org>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
"open list:ARM/QUALCOMM SUPPORT" <linux-soc@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Andy Gross <agross@kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, Rob Herring <robh@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Jimmy Cheng-Yi Chiang <cychiang@google.com>
Subject: Re: [PATCH] arm64: dts: qcom: sc7180: Add LPASS clock controller nodes
Date: Fri, 31 Jul 2020 13:38:09 -0700 [thread overview]
Message-ID: <CAD=FV=XPo8Sa5qK1n1duP7KUcapd6qj1KSBmagAAoNuUuHnWtw@mail.gmail.com> (raw)
In-Reply-To: <CAD=FV=XwYQxkKQruVPnO9Nbsv_3uyD75-dcyOeB62zLVjJE5+Q@mail.gmail.com>
Hi,
On Thu, Jul 16, 2020 at 10:34 AM Doug Anderson <dianders@chromium.org> wrote:
>
> Hi,
>
> On Tue, Jul 14, 2020 at 11:56 PM Taniya Das <tdas@codeaurora.org> wrote:
> >
> > Update the clock controller nodes for Low power audio subsystem
> > functionality.
> >
> > Signed-off-by: Taniya Das <tdas@codeaurora.org>
> > ---
>
> Somewhere here you should be pointing to the unlanded bindings patch, AKA:
>
> https://lore.kernel.org/r/1594795010-9074-3-git-send-email-tdas@codeaurora.org
>
> As per usual the fact that are using a new bindings #include file
> means Qualcomm maintainers and clock maintainers will need to
> coordinate landing and this needs to be pointed out.
>
>
> > arch/arm64/boot/dts/qcom/sc7180.dtsi | 22 ++++++++++++++++++++++
> > 1 file changed, 22 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > index 2be81a2..8c30a17 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > @@ -8,6 +8,7 @@
> > #include <dt-bindings/clock/qcom,dispcc-sc7180.h>
> > #include <dt-bindings/clock/qcom,gcc-sc7180.h>
> > #include <dt-bindings/clock/qcom,gpucc-sc7180.h>
> > +#include <dt-bindings/clock/qcom,lpasscorecc-sc7180.h>
> > #include <dt-bindings/clock/qcom,rpmh.h>
> > #include <dt-bindings/clock/qcom,videocc-sc7180.h>
> > #include <dt-bindings/interconnect/qcom,osm-l3.h>
> > @@ -2136,6 +2137,27 @@
> > };
> > };
> >
> > + lpasscc: clock-controller@62d00000 {
> > + compatible = "qcom,sc7180-lpasscorecc";
> > + reg = <0 0x62d00000 0 0x50000>,
> > + <0 0x62780000 0 0x30000>;
> > + reg-names = "lpass_core_cc", "lpass_audio_cc";
> > + clocks = <&gcc GCC_LPASS_CFG_NOC_SWAY_CLK>;
> > + clock-names = "iface";
> > + power-domains = <&lpass_hm LPASS_CORE_HM_GDSCR>;
> > + #clock-cells = <1>;
> > + #power-domain-cells = <1>;
> > + };
> > +
> > + lpass_hm: clock-controller@63000000 {
> > + compatible = "qcom,sc7180-lpasshm";
> > + reg = <0 0x63000000 0 0x28>;
> > + clocks = <&gcc GCC_LPASS_CFG_NOC_SWAY_CLK>;
> > + clock-names = "iface";
> > + #clock-cells = <1>;
> > + #power-domain-cells = <1>;
> > + };
>
> Question: would it ever make sense for a board not to need this clock
> controller? I ask because the sdm845 "lpass" clock controller is
> "disabled" by default but yours here isn't. I know sc7180 and sdm845
> work pretty differently and perhaps the sdm845's default of "disabled"
> was just overkill, but I thought I'd ask.
>
>
> > +
> > etm@7040000 {
> > compatible = "arm,coresight-etm4x", "arm,primecell";
> > reg = <0 0x07040000 0 0x1000>;
>
> Your sort order is off. You should be sorting by unit address. Note
> that the "ETM" has an extra 0 before its 7, so you're comparing 63 to
> 07 and you should be after.
>
> Other than those small things above this patch looks like it matches
> the example in the bindings, so as long as Rob / the clock guys are
> fine with the bindings then this seems good to go.
So it looks like the bindings landed and one would think we'd be good
to go. Except that when I mixed your device tree patch with the
driver that landed things went boom.
Can you please re-post addressing my concerns above and also adding
"bi_tcxo" as I have done in the bindings example here:
https://lore.kernel.org/r/20200731133006.1.Iee81b115f5be50d6d69500fe1bda11bba6e16143@changeid
Thanks!
-Doug
prev parent reply other threads:[~2020-07-31 20:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 6:55 [PATCH] arm64: dts: qcom: sc7180: Add LPASS clock controller nodes Taniya Das
2020-07-16 17:34 ` Doug Anderson
2020-07-31 20:38 ` Doug Anderson [this message]
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