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Date:   Thu, 11 Apr 2019 09:50:37 +0100
From:   Willy Wolff <willy.mh.wolff.ml@...il.com>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chanwoo Choi <cw00.choi@...sung.com>, myungjoo.ham@...sung.com,
        linux-samsung-soc@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        Pankaj Dubey <pankaj.dubey@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH RFC 8/8] ARM: dts: exynos: Add ASV tables for
 exynos5422/5800

Hi Anand,

I'm using this frequencies on the board since 3 years, without any stability
issues. The kind of worklaod used is intensive CPU-bound benchmarks running 
for 20 mins at least in order to stress the system, I'm studying schedulability
under high thermal constraints.

So, I would say these frequencies are safe by experience.

Best Regards,
Willy


On Thu, Apr 11, 2019 at 01:09:04PM +0530, Anand Moon wrote:
> Hi Sylwester,
> 
> As per my knowledge HK soc introduce this table to support
> overclocking of cpufreq for Odroid XU3 XU4 family for boards.
> 
> ARM Cortex-A15 Quad CPU (Eagle) 1800 to 2000
> ARM Cortex-A7 Quard CPU (Kingfisher) 1400 to 1500
> 
> For Exynos5422  below table
> asv-table-[0-3]  AVS range from 200 to 2100
> asv-table-[100-103] AVS range from 200 to 1500.
> 
> Are these setting stable for this board to cover clock the cpu now.
> 
> Can you also enable support for this clk-exynos5420.c
> For example exynos5800_eglclk_d and exynos5420_kfcclk_d table.
> 
> Also can you update exynos5420.dtsi  following opp table
> For example cluster_a15_opp_table and cluster_a7_opp_table opt binding.
> 
> To make this work synchronously with AVS.
> 
> Best Regards
> -Anand
> 
> On Thu, 4 Apr 2019 at 22:55, Sylwester Nawrocki <s.nawrocki@...sung.com> wrote:
> >
> > This patch ASV (Adaptive Supply Voltage) table entries for
> > Exynos5422/5800 SoC.
> >
> > Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
> > ---
> >  arch/arm/boot/dts/exynos5.dtsi    |   2 +-
> >  arch/arm/boot/dts/exynos5800.dtsi | 207 ++++++++++++++++++++++++++++++
> >  2 files changed, 208 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
> > index 67f9b4504a42..22eb951c614c 100644
> > --- a/arch/arm/boot/dts/exynos5.dtsi
> > +++ b/arch/arm/boot/dts/exynos5.dtsi
> > @@ -35,7 +35,7 @@
> >                 #size-cells = <1>;
> >                 ranges;
> >
> > -               chipid@...00000 {
> > +               chipid: chipid@...00000 {
> >                         compatible = "samsung,exynos4210-chipid";
> >                         reg = <0x10000000 0x100>;
> >                 };
> > diff --git a/arch/arm/boot/dts/exynos5800.dtsi b/arch/arm/boot/dts/exynos5800.dtsi
> > index 57d3b319fd65..5358865f5c0b 100644
> > --- a/arch/arm/boot/dts/exynos5800.dtsi
> > +++ b/arch/arm/boot/dts/exynos5800.dtsi
> > @@ -16,6 +16,213 @@
> >         compatible = "samsung,exynos5800", "samsung,exynos5";
> >  };
> >
> > +&chipid {
> > +       asv {
> > +               compatible = "samsung,exynos-asv-v1";
> > +               asv-table-0 {
> > +                       /* ARM 0, 1 */
> > +                       samsung,asv-table-size = <20 15>;
> > +                       samsung,asv-table-id = <0x0>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12   ASV13 */
> > +                               <2100 1362500 1362500 1350000 1337500 1325000 1312500 1300000 1275000 1262500 1250000 1237500 1225000 1212500 1200000>,
> > +                               <2000 1312500 1312500 1300000 1287500 1275000 1262500 1250000 1237500 1225000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1900 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1162500 1150000 1137500 1125000 1112500>,
> > +                               <1800 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1112500 1100000 1087500 1075000 1062500>,
> > +                               <1700 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1075000 1062500 1050000 1037500 1025000>,
> > +                               <1600 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1037500 1025000 1012500 1000000  987500>,
> > +                               <1500 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500 1000000  987500  975000  962500  950000>,
> > +                               <1400 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  975000  962500  950000  937500  925000>,
> > +                               <1300 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  962500  950000  937500  925000  912500>,
> > +                               <1200 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  937500  925000  912500  900000  900000>,
> > +                               <1100 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000>,
> > +                               <1000  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 900  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 800  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                    /* ASV0...13 */
> > +                       samsung,asv-common-data = <700 900000>,
> > +                                                 <600 900000>,
> > +                                                 <500 900000>,
> > +                                                 <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +               asv-table-2 {
> > +                       /* ARM 2 */
> > +                       samsung,asv-table-size = <20 15>;
> > +                       samsung,asv-table-id = <0x2>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <2100 1362500 1362500 1350000 1337500 1325000 1312500 1300000 1275000 1262500 1250000 1237500 1225000 1212500 1200000>,
> > +                               <2000 1312500 1312500 1312500 1300000 1275000 1262500 1250000 1237500 1225000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1900 1262500 1250000 1250000 1237500 1212500 1200000 1187500 1175000 1162500 1175000 1162500 1150000 1137500 1125000>,
> > +                               <1800 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1125000 1112500 1100000 1087500 1075000>,
> > +                               <1700 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1087500 1075000 1062500 1050000 1037500>,
> > +                               <1600 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1050000 1037500 1025000 1012500 1000000>,
> > +                               <1500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000 1012500 1000000  987500  975000  962500>,
> > +                               <1400 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  987500  975000  962500  950000  937500>,
> > +                               <1300 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  962500  950000  937500  925000  912500>,
> > +                               <1200 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  937500  925000  912500  900000  900000>,
> > +                               <1100 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000>,
> > +                               <1000  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 900  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 800  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                    /* ASV0...13 */
> > +                       samsung,asv-common-data = <700 900000>,
> > +                                                 <600 900000>,
> > +                                                 <500 900000>,
> > +                                                 <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +               asv-table-3 {
> > +                       /* ARM 3 */
> > +                       samsung,asv-table-size = <20 15>;
> > +                       samsung,asv-table-id = <0x3>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <2100 1362500 1362500 1350000 1337500 1325000 1312500 1300000 1275000 1262500 1250000 1237500 1225000 1212500 1200000>,
> > +                               <2000 1312500 1312500 1300000 1287500 1275000 1262500 1250000 1237500 1225000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1900 1262500 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1175000 1162500 1150000 1137500 1125000>,
> > +                               <1800 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1125000 1112500 1100000 1087500 1075000>,
> > +                               <1700 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1087500 1075000 1062500 1050000 1037500>,
> > +                               <1600 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1050000 1037500 1025000 1012500 1000000>,
> > +                               <1500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000 1012500 1000000  987500  975000  962500>,
> > +                               <1400 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  987500  975000  962500  950000  937500>,
> > +                               <1300 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  962500  950000  937500  925000  912500>,
> > +                               <1200 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  937500  925000  912500  900000  900000>,
> > +                               <1100 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000>,
> > +                               <1000  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 900  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 800  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                    /* ASV0...13 */
> > +                       samsung,asv-common-data = <700 900000>,
> > +                                                 <600 900000>,
> > +                                                 <500 900000>,
> > +                                                 <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +
> > +               asv-table-4 {
> > +                       /* ARM BIN2 */
> > +                       samsung,asv-table-size = <17 15>;
> > +                       samsung,asv-table-id = <0x4>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <1800 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1150000 1137500 1125000 1112500 1100000>,
> > +                               <1700 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1112500 1100000 1087500 1075000 1062500>,
> > +                               <1600 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1075000 1062500 1050000 1037500 1025000>,
> > +                               <1500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1037500 1025000 1012500 1000000 987500>,
> > +                               <1400 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000 1012500 1000000 987500  975000  962500>,
> > +                               <1300 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000 987500  1000000 987500  975000  962500  950000>,
> > +                               <1200 1062500 1050000 1037500 1025000 1012500 1000000 987500  975000  962500  975000  962500  950000  937500  925000>,
> > +                               <1100 1037500 1025000 1012500 1000000 987500  975000  962500  950000  937500  950000  937500  925000  912500  900000>,
> > +                               <1000 1012500 1000000  987500  975000 962500  950000  937500  925000  912500  925000  912500  900000  900000  900000>,
> > +                               < 900  987500  975000  962500  950000 937500  925000  912500  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 800  962500  950000  937500  925000 912500  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 700  937500  925000  912500  900000 900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                      /* ASV0...13 */
> > +                       samsung,asv-common-data = <600 900000>,
> > +                                                 <500 900000>,
> > +                                                 <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +
> > +
> > +               asv-table-100 {
> > +                       /* KFC 0, 1 */
> > +                       samsung,asv-table-size = <14 15>;
> > +                       samsung,asv-table-id = <0x100>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <1500 1300000 1300000 1300000 1287500 1287500 1287500 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1400 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500>,
> > +                               <1300 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500>,
> > +                               <1200 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500>,
> > +                               <1100 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000>,
> > +                               <1000 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500>,
> > +                               < 900 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000>,
> > +                               < 800 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000>,
> > +                               < 700  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 600  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 500  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                     /* ASV0...13 */
> > +                       samsung,asv-common-data = <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +
> > +               asv-table-102 {
> > +                       /* KFC 2 */
> > +                       samsung,asv-table-size = <14 15>;
> > +                       samsung,asv-table-id = <0x102>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <1500 1300000 1300000 1300000 1287500 1287500 1287500 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1400 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500>,
> > +                               <1300 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500>,
> > +                               <1200 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500>,
> > +                               <1100 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000>,
> > +                               <1000 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500>,
> > +                               < 900 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000>,
> > +                               < 800 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000>,
> > +                               < 700  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 600  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 500  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                     /* ASV0...13 */
> > +                       samsung,asv-common-data = <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +
> > +               asv-table-103 {
> > +                       /* KFC 3 */
> > +                       samsung,asv-table-size = <14 15>;
> > +                       samsung,asv-table-id = <0x103>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <1500 1300000 1300000 1300000 1287500 1287500 1287500 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500>,
> > +                               <1400 1275000 1262500 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500>,
> > +                               <1300 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500>,
> > +                               <1200 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500>,
> > +                               <1100 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000>,
> > +                               <1000 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500>,
> > +                               < 900 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000>,
> > +                               < 800 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000>,
> > +                               < 700  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 600  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 500  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                     /* ASV0...13 */
> > +                       samsung,asv-common-data = <400 900000>,
> > +                                                 <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +
> > +               asv-table-104 {
> > +                       /* KFC BIN2 */
> > +                       samsung,asv-table-size = <12 15>;
> > +                       samsung,asv-table-id = <0x104>;
> > +                       samsung,asv-data =
> > +                                     /* ASV0  ASV1    ASV2    ASV3    ASV4    ASV5    ASV6    ASV7    ASV8    ASV9    ASV10   ASV11   ASV12  ASV13 */
> > +                               <1300 1250000 1237500 1225000 1212500 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500>,
> > +                               <1200 1200000 1187500 1175000 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500>,
> > +                               <1100 1162500 1150000 1137500 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000>,
> > +                               <1000 1125000 1112500 1100000 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500>,
> > +                               < 900 1087500 1075000 1062500 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000>,
> > +                               < 800 1050000 1037500 1025000 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000>,
> > +                               < 700 1012500 1000000  987500  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000>,
> > +                               < 600  975000  962500  950000  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 500  937500  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>,
> > +                               < 400  925000  912500  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000  900000>;
> > +                                                     /* ASV0...13 */
> > +                       samsung,asv-common-data = <300 900000>,
> > +                                                 <200 900000>;
> > +               };
> > +       };
> > +};
> > +
> >  &clock {
> >         compatible = "samsung,exynos5800-clock";
> >  };
> > --
> > 2.17.1
> >

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