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Subject: Re: [PATCH 6/8] DT: arm: exynos: add DMC device for exynos5422
To:     Krzysztof Kozlowski <krzk@kernel.org>
Cc:     devicetree@vger.kernel.org,
        =?UTF-8?Q?Bart=c5=82omiej_=c5=bbo=c5=82nierkiewicz?= 
        <b.zolnierkie@samsung.com>, myungjoo.ham@samsung.com,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Kukjin Kim <kgene@kernel.org>,
        linux-arm-kernel@lists.infradead.org,
        "linux-samsung-soc@vger.kernel.org" 
        <linux-samsung-soc@vger.kernel.org>, linux-kernel@vger.kernel.org
From:   Lukasz Luba <l.luba@partner.samsung.com>
Message-ID: <0daee320-1494-172a-9500-8b60dbdda3b7@partner.samsung.com>
Date:   Tue, 29 Jan 2019 18:06:51 +0100
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Hi Krzysztof,

On 1/29/19 4:13 PM, Krzysztof Kozlowski wrote:
> On Mon, 28 Jan 2019 at 20:21, Lukasz Luba <l.luba@partner.samsung.com> wrote:
>>
>> Add description of Dynamic Memory Controller and PPMU counters.
>> They are used by exynos5-dmc driver.
>>
>> CC: Rob Herring <robh+dt@kernel.org>
>> CC: Mark Rutland <mark.rutland@arm.com>
>> CC: Kukjin Kim <kgene@kernel.org>
>> CC: Krzysztof Kozlowski <krzk@kernel.org>
>> CC: devicetree@vger.kernel.org
>> CC: linux-arm-kernel@lists.infradead.org
>> CC: linux-samsung-soc@vger.kernel.org
>> CC: linux-kernel@vger.kernel.org
>> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
>> ---
>>   arch/arm/boot/dts/exynos5420.dtsi             | 81 +++++++++++++++++++++++++++
>>   arch/arm/boot/dts/exynos5422-odroid-core.dtsi | 22 ++++++++
>>   2 files changed, 103 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
>> index aaff158..6880d13 100644
>> --- a/arch/arm/boot/dts/exynos5420.dtsi
>> +++ b/arch/arm/boot/dts/exynos5420.dtsi
>> @@ -1337,6 +1337,87 @@
>>                                  opp-hz = /bits/ 64 <400000000>;
>>                          };
>>                  };
>> +
>> +               ppmu_dmc0_0: ppmu_dmc0_0@10d00000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d00000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX0_0>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event_dmc0_0: ppmu-event3-dmc0_0 {
>> +                                       event-name = "ppmu-event3-dmc0_0";
>> +                               };
>> +                       };
>> +               };
>> +
>> +
> 
> No need for double line.
Agree
> 
>> +               ppmu_dmc0_1: ppmu_dmc0_1@10d10000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d10000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX0_1>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event_dmc0_1: ppmu-event3-dmc0_1 {
>> +                                       event-name = "ppmu-event3-dmc0_1";
>> +                               };
>> +                       };
>> +               };
>> +
>> +               ppmu_dmc1_0: ppmu_dmc1_0@10d10000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d60000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX1_0>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event_dmc1_0: ppmu-event3-dmc1_0 {
>> +                                       event-name = "ppmu-event3-dmc1_0";
>> +                               };
>> +                       };
>> +               };
>> +
>> +               ppmu_dmc1_1: ppmu_dmc1_1@10d70000 {
> 
> 1. Generic node name, e.g. "ppmu".
> 2. Please put all ppmu nodes after nocp nodes to group everything logically.
OK
> 
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d70000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX1_1>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event_dmc1_1: ppmu-event3-dmc1_1 {
>> +                                       event-name = "ppmu-event3-dmc1_1";
>> +                               };
>> +                       };
>> +               };
>> +
>> +               dmc: dmc@10c20000 {
> 
> 1. Node name: memory-controller.
> 2. Put it before nocp nodes.
OK
> 
>> +                       compatible = "samsung,exynos5422-dmc";
>> +                       reg = <0x10c20000 0x10000>, <0x10c30000 0x10000>,
>> +                               <0x10030000 0x1000>, <0x10000000 0x1000>;
>> +                       clocks =        <&clock CLK_FOUT_SPLL>,
> 
> Weird indentation.
> 
>> +                                       <&clock CLK_MOUT_SCLK_SPLL>,
>> +                                       <&clock CLK_FF_DOUT_SPLL2>,
> 
> Indent all continued lines with first entry (like in other places in this file)
> 
>> +                                       <&clock CLK_FOUT_BPLL>,
>> +                                       <&clock CLK_MOUT_BPLL>,
>> +                                       <&clock CLK_SCLK_BPLL>,
>> +                                       <&clock CLK_MOUT_MX_MSPLL_CCORE>,
>> +                                       <&clock CLK_MOUT_MX_MSPLL_CCORE_PHY>,
>> +                                       <&clock CLK_MOUT_MCLK_CDREX>,
>> +                                       <&clock CLK_DOUT_CLK2X_PHY0>,
>> +                                       <&clock CLK_CLKM_PHY0>,
>> +                                       <&clock CLK_CLKM_PHY1>
>> +                                       ;
> 
> Join the trailing semicolon with previous lines.
OK
> 
>> +                       clock-names =   "fout_spll",
>> +                                       "mout_sclk_spll",
> 
> Indent all continued lines with first entry (like in other places in this file).
OK and all the entries will be compacted where possible for 80lines.
> 
>> +                                       "ff_dout_spll2",
>> +                                       "fout_bpll",
>> +                                       "mout_bpll",
>> +                                       "sclk_bpll",
>> +                                       "mout_mx_mspll_ccore",
>> +                                       "mout_mx_mspll_ccore_phy",
>> +                                       "mout_mclk_cdrex",
>> +                                       "dout_clk2x_phy0",
>> +                                       "clkm_phy0",
>> +                                       "clkm_phy1"
>> +                                       ;
> 
> Join the trailing semicolon with previous lines.
>> +               };
>>          };
>>
>>          thermal-zones {
>> diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> index bf09eab..54ee8b2 100644
>> --- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> +++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> @@ -119,6 +119,28 @@
>>          status = "okay";
>>   };
>>
>> +&ppmu_dmc0_0 {
>> +       status = "okay";
>> +};
>> +
>> +&ppmu_dmc0_1 {
>> +       status = "okay";
>> +};
>> +
>> +&ppmu_dmc1_0 {
>> +       status = "okay";
>> +};
>> +
>> +&ppmu_dmc1_1 {
>> +       status = "okay";
>> +};
> 
> Put the new entries respecting alphabetical order (order of label name).
OK
> 
>> +
>> +&dmc {
> 
> The same.

Thank you for review, in v2 it will be fixed.

Regards,
Lukasz
> 
> Best regards,
> Krzysztof
> 
>> +       devfreq-events = <&ppmu_dmc0_0>, <&ppmu_dmc0_1>,
>> +                       <&ppmu_dmc1_0>, <&ppmu_dmc1_1>;
>> +       status = "okay";
>> +};
>> +
>>   &cpu0 {
>>          cpu-supply = <&buck6_reg>;
>>   };
>> --
>> 2.7.4
>>
> 
>