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Subject: Re: [PATCH v7 12/13] ARM: dts: exynos: add DMC device for
 exynos5422
To:     Krzysztof Kozlowski <krzk@kernel.org>
Cc:     devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-pm@vger.kernel.org,
        "linux-samsung-soc@vger.kernel.org" 
        <linux-samsung-soc@vger.kernel.org>,
        =?UTF-8?Q?Bart=c5=82omiej_=c5=bbo=c5=82nierkiewicz?= 
        <b.zolnierkie@samsung.com>, kgene@kernel.org,
        Chanwoo Choi <cw00.choi@samsung.com>,
        kyungmin.park@samsung.com,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        s.nawrocki@samsung.com, myungjoo.ham@samsung.com,
        keescook@chromium.org, tony@atomide.com, jroedel@suse.de,
        treding@nvidia.com, digetx@gmail.com, willy.mh.wolff.ml@gmail.com
From:   Lukasz Luba <l.luba@partner.samsung.com>
Message-ID: <b8debbd9-fd49-5666-eab1-b905ed050067@partner.samsung.com>
Date:   Wed, 8 May 2019 12:05:18 +0200
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On 5/8/19 9:25 AM, Krzysztof Kozlowski wrote:
> On Mon, 6 May 2019 at 17:12, Lukasz Luba <l.luba@partner.samsung.com> wrote:
>>
>> Add description of Dynamic Memory Controller and PPMU counters.
>> They are used by exynos5422-dmc driver.
>> There is a definition of the memory chip, which is then used during
>> calculation of timings for each OPP.
>> The algorithm in the driver needs these two sets to bound the timings.
>>
>> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
>> ---
>>   arch/arm/boot/dts/exynos5420.dtsi             | 121 +++++++++++++++++++++++++
>>   arch/arm/boot/dts/exynos5422-odroid-core.dtsi | 122 ++++++++++++++++++++++++++
>>   2 files changed, 243 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
>> index aaff158..1b66601 100644
>> --- a/arch/arm/boot/dts/exynos5420.dtsi
>> +++ b/arch/arm/boot/dts/exynos5420.dtsi
>> @@ -14,6 +14,7 @@
>>   #include <dt-bindings/clock/exynos5420.h>
>>   #include <dt-bindings/clock/exynos-audss-clk.h>
>>   #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/pmu/exynos_ppmu.h>
>>
>>   / {
>>          compatible = "samsung,exynos5420", "samsung,exynos5";
>> @@ -235,6 +236,38 @@
>>                          status = "disabled";
>>                  };
>>
>> +               dmc: memory-controller@10c20000 {
>> +                       compatible = "samsung,exynos5422-dmc";
>> +                       reg = <0x10c20000 0x100>, <0x10c30000 0x100>;
>> +                       clocks = <&clock CLK_FOUT_SPLL>,
>> +                                <&clock CLK_MOUT_SCLK_SPLL>,
>> +                                <&clock CLK_FF_DOUT_SPLL2>,
>> +                                <&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>;
>> +                       clock-names = "fout_spll",
>> +                                     "mout_sclk_spll",
>> +                                     "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";
>> +                       samsung,syscon-clk = <&clock>;
>> +                       samsung,syscon-chipid = <&chipid>;
>> +                       status = "disabled";
>> +               };
>> +
>>                  nocp_mem0_0: nocp@10ca1000 {
>>                          compatible = "samsung,exynos5420-nocp";
>>                          reg = <0x10CA1000 0x200>;
>> @@ -271,6 +304,94 @@
>>                          status = "disabled";
>>                  };
>>
>> +               ppmu_dmc0_0: ppmu@10d00000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d00000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX0_0>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event0_dmc0_0: ppmu-event0-dmc0_0 {
>> +                                       event-name = "ppmu-event0-dmc0_0";
>> +                                       event-data-type = <PPMU_RO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event1_dmc0_0: ppmu-event1-dmc0_0 {
>> +                                       event-name = "ppmu-event1-dmc0_0";
>> +                                       event-data-type = <PPMU_WO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event3_dmc0_0: ppmu-event3-dmc0_0 {
>> +                                       event-name = "ppmu-event3-dmc0_0";
>> +                                       event-data-type = <(PPMU_RO_DATA_CNT |
>> +                                               PPMU_WO_DATA_CNT)>;
>> +                               };
>> +                       };
>> +               };
>> +
>> +               ppmu_dmc0_1: ppmu@10d10000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d10000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX0_1>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event0_dmc0_1: ppmu-event0-dmc0_1 {
>> +                                       event-name = "ppmu-event0-dmc0_1";
>> +                                       event-data-type = <PPMU_RO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event1_dmc0_1: ppmu-event1-dmc0_1 {
>> +                                       event-name = "ppmu-event1-dmc0_1";
>> +                                       event-data-type = <PPMU_WO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event3_dmc0_1: ppmu-event3-dmc0_1 {
>> +                                       event-name = "ppmu-event3-dmc0_1";
>> +                                       event-data-type = <(PPMU_RO_DATA_CNT |
>> +                                               PPMU_WO_DATA_CNT)>;
>> +                               };
>> +                       };
>> +               };
>> +
>> +               ppmu_dmc1_0: ppmu@10d60000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d60000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX1_0>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event0_dmc1_0: ppmu-event0-dmc1_0 {
>> +                                       event-name = "ppmu-event0-dmc1_0";
>> +                                       event-data-type = <PPMU_RO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event1_dmc1_0: ppmu-event1-dmc1_0 {
>> +                                       event-name = "ppmu-event1-dmc1_0";
>> +                                       event-data-type = <PPMU_WO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event3_dmc1_0: ppmu-event3-dmc1_0 {
>> +                                       event-name = "ppmu-event3-dmc1_0";
>> +                                       event-data-type = <(PPMU_RO_DATA_CNT |
>> +                                               PPMU_WO_DATA_CNT)>;
>> +                               };
>> +                       };
>> +               };
>> +
>> +               ppmu_dmc1_1: ppmu@10d70000 {
>> +                       compatible = "samsung,exynos-ppmu";
>> +                       reg = <0x10d70000 0x2000>;
>> +                       clocks = <&clock CLK_PCLK_PPMU_DREX1_1>;
>> +                       clock-names = "ppmu";
>> +                       events {
>> +                               ppmu_event0_dmc1_1: ppmu-event0-dmc1_1 {
>> +                                       event-name = "ppmu-event0-dmc1_1";
>> +                                       event-data-type = <PPMU_RO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event1_dmc1_1: ppmu-event1-dmc1_1 {
>> +                                       event-name = "ppmu-event1-dmc1_1";
>> +                                       event-data-type = <PPMU_WO_DATA_CNT>;
>> +                               };
>> +                               ppmu_event3_dmc1_1: ppmu-event3-dmc1_1 {
>> +                                       event-name = "ppmu-event3-dmc1_1";
>> +                                       event-data-type = <(PPMU_RO_DATA_CNT |
>> +                                               PPMU_WO_DATA_CNT)>;
>> +                               };
>> +                       };
>> +               };
>> +
>>                  gsc_pd: power-domain@10044000 {
>>                          compatible = "samsung,exynos4210-pd";
>>                          reg = <0x10044000 0x20>;
>> diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> index 25d95de1..76abf03 100644
>> --- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> +++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
>> @@ -34,6 +34,97 @@
>>                          clock-frequency = <24000000>;
>>                  };
>>          };
>> +
>> +       dmc_opp_table: opp_table2 {
>> +               compatible = "operating-points-v2";
>> +
>> +               opp00 {
>> +                       opp-hz = /bits/ 64 <165000000>;
>> +                       opp-microvolt = <875000>;
>> +               };
>> +               opp01 {
>> +                       opp-hz = /bits/ 64 <206000000>;
>> +                       opp-microvolt = <875000>;
>> +               };
>> +               opp02 {
>> +                       opp-hz = /bits/ 64 <275000000>;
>> +                       opp-microvolt = <875000>;
>> +               };
>> +               opp03 {
>> +                       opp-hz = /bits/ 64 <413000000>;
>> +                       opp-microvolt = <887500>;
>> +               };
>> +               opp04 {
>> +                       opp-hz = /bits/ 64 <543000000>;
>> +                       opp-microvolt = <937500>;
>> +               };
>> +               opp05 {
>> +                       opp-hz = /bits/ 64 <633000000>;
>> +                       opp-microvolt = <1012500>;
>> +               };
>> +               opp06 {
>> +                       opp-hz = /bits/ 64 <728000000>;
>> +                       opp-microvolt = <1037500>;
>> +               };
>> +               opp07 {
>> +                       opp-hz = /bits/ 64 <825000000>;
>> +                       opp-microvolt = <1050000>;
>> +               };
>> +       };
>> +
>> +       samsung_K3QF2F20DB: lpddr3 {
>> +               compatible      = "Samsung,K3QF2F20DB", "jedec,lpddr3";
>> +               density         = <16384>;
>> +               io-width        = <32>;
>> +               #address-cells  = <1>;
>> +               #size-cells     = <0>;
>> +
>> +               tRFC-min-tck            = <17>;
>> +               tRRD-min-tck            = <2>;
>> +               tRPab-min-tck           = <2>;
>> +               tRPpb-min-tck           = <2>;
>> +               tRCD-min-tck            = <3>;
>> +               tRC-min-tck             = <6>;
>> +               tRAS-min-tck            = <5>;
>> +               tWTR-min-tck            = <2>;
>> +               tWR-min-tck             = <7>;
>> +               tRTP-min-tck            = <2>;
>> +               tW2W-C2C-min-tck        = <0>;
>> +               tR2R-C2C-min-tck        = <0>;
>> +               tWL-min-tck             = <8>;
>> +               tDQSCK-min-tck          = <5>;
>> +               tRL-min-tck             = <14>;
>> +               tFAW-min-tck            = <5>;
>> +               tXSR-min-tck            = <12>;
>> +               tXP-min-tck             = <2>;
>> +               tCKE-min-tck            = <2>;
>> +               tCKESR-min-tck          = <2>;
>> +               tMRD-min-tck            = <5>;
>> +
>> +               timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@0 {
>> +                       compatible      = "jedec,lpddr3-timings";
>> +                       reg             = <800000000>; /* workaround: it shows max-freq */
> 
> Please be sure that there are no new warnings (make dtbs W=1). This
> does not look correct (reg does not match unit address).
Rob has also pointed out in the bindings that it should have @800000000.
Regarding the dtbs warnings, it does not produce any new even with '@0'.

I have changed it to @800000000 in the next version.

Regards,
Lukasz
> 
> Best regards,
> Krzysztof
> 
>