diff mbox series

[v1,07/10] arm64: dts: qcom: ipq5332: populate the opp table based on the eFuse

Message ID a6d12e3b253d6a55d85f66979ba8b7d9c9ff6072.1693996662.git.quic_varada@quicinc.com (mailing list archive)
State Superseded
Headers show
Series Enable cpufreq for IPQ5332 & IPQ9574 | expand

Commit Message

Varadarajan Narayanan Sept. 7, 2023, 5:21 a.m. UTC
IPQ53xx have different OPPs available for the CPU based on
SoC variant. This can be determined through use of an eFuse
register present in the silicon.

Add support to read the eFuse and populate the OPPs based on it.

Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
---
 arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

Comments

Krzysztof Kozlowski Sept. 7, 2023, 6:03 a.m. UTC | #1
On 07/09/2023 07:21, Varadarajan Narayanan wrote:
> IPQ53xx have different OPPs available for the CPU based on
> SoC variant. This can be determined through use of an eFuse
> register present in the silicon.
> 
> Add support to read the eFuse and populate the OPPs based on it.
> 
> Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>


>  	};
> @@ -150,6 +173,11 @@
>  			reg = <0x000a4000 0x721>;
>  			#address-cells = <1>;
>  			#size-cells = <1>;
> +
> +			cpu_speed_bin: cpu_speed_bin@1d {

No underscores in node names. I am pretty sure I repeated it multiple
times already...

Best regards,
Krzysztof
Dmitry Baryshkov Sept. 7, 2023, 1:59 p.m. UTC | #2
On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
<quic_varada@quicinc.com> wrote:
>
> IPQ53xx have different OPPs available for the CPU based on
> SoC variant. This can be determined through use of an eFuse
> register present in the silicon.
>
> Add support to read the eFuse and populate the OPPs based on it.
>
> Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> ---
>  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
>  1 file changed, 31 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> index 82761ae..3ca3f34 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> @@ -91,11 +91,34 @@
>         };
>
>         cpu_opp_table: opp-table-cpu {
> -               compatible = "operating-points-v2";
> +               compatible = "operating-points-v2-kryo-cpu";
>                 opp-shared;
> +               nvmem-cells = <&cpu_speed_bin>;
> +               nvmem-cell-names = "speed_bin";
> +
> +               /*
> +                * Listed all supported CPU frequencies and opp-supported-hw
> +                * values to select CPU frequencies based on the limits fused.
> +                * ------------------------------------------------------------
> +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> +                * ------------------------------------------------------------
> +                * 1100000000     1      1      1       1            0xF
> +                * 1500000000     0      0      1       1            0x3
> +                * -----------------------------------------------------------
> +                */

This can probably go to the commit message instead.

> +
> +               opp-1100000000 {
> +                       opp-hz = /bits/ 64 <1100000000>;

But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz

> +                       opp-microvolt = <850000>;
> +                       opp-supported-hw = <0xF>;
> +                       clock-latency-ns = <200000>;
> +               };
>
> -               opp-1488000000 {
> -                       opp-hz = /bits/ 64 <1488000000>;
> +               opp-1500000000 {
> +                       opp-hz = /bits/ 64 <1500000000>;

So, 1.488 GHz or 1.5 GHz?

> +                       opp-microvolt = <950000>;

Which regulator is controlled by this microvolt?

> +                       opp-supported-hw = <0x3>;
>                         clock-latency-ns = <200000>;
>                 };
>         };
> @@ -150,6 +173,11 @@
>                         reg = <0x000a4000 0x721>;
>                         #address-cells = <1>;
>                         #size-cells = <1>;
> +
> +                       cpu_speed_bin: cpu_speed_bin@1d {
> +                               reg = <0x1d 0x2>;
> +                               bits = <7 2>;
> +                       };
>                 };
>
>                 rng: rng@e3000 {
> --
> 2.7.4
>
Varadarajan Narayanan Oct. 5, 2023, 9:57 a.m. UTC | #3
On Thu, Sep 07, 2023 at 04:59:28PM +0300, Dmitry Baryshkov wrote:
> On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
> <quic_varada@quicinc.com> wrote:
> >
> > IPQ53xx have different OPPs available for the CPU based on
> > SoC variant. This can be determined through use of an eFuse
> > register present in the silicon.
> >
> > Add support to read the eFuse and populate the OPPs based on it.
> >
> > Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> > ---
> >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
> >  1 file changed, 31 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > index 82761ae..3ca3f34 100644
> > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > @@ -91,11 +91,34 @@
> >         };
> >
> >         cpu_opp_table: opp-table-cpu {
> > -               compatible = "operating-points-v2";
> > +               compatible = "operating-points-v2-kryo-cpu";
> >                 opp-shared;
> > +               nvmem-cells = <&cpu_speed_bin>;
> > +               nvmem-cell-names = "speed_bin";
> > +
> > +               /*
> > +                * Listed all supported CPU frequencies and opp-supported-hw
> > +                * values to select CPU frequencies based on the limits fused.
> > +                * ------------------------------------------------------------
> > +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> > +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> > +                * ------------------------------------------------------------
> > +                * 1100000000     1      1      1       1            0xF
> > +                * 1500000000     0      0      1       1            0x3
> > +                * -----------------------------------------------------------
> > +                */
>
> This can probably go to the commit message instead.

Ok

> > +
> > +               opp-1100000000 {
> > +                       opp-hz = /bits/ 64 <1100000000>;
>
> But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz

Will update it.

> > +                       opp-microvolt = <850000>;
> > +                       opp-supported-hw = <0xF>;
> > +                       clock-latency-ns = <200000>;
> > +               };
> >
> > -               opp-1488000000 {
> > -                       opp-hz = /bits/ 64 <1488000000>;
> > +               opp-1500000000 {
> > +                       opp-hz = /bits/ 64 <1500000000>;
>
> So, 1.488 GHz or 1.5 GHz?

1.5 GHz

> > +                       opp-microvolt = <950000>;
>
> Which regulator is controlled by this microvolt?

Based on the SKU, the XBL sets up the regulator to provide 950000uV
on CPUs capable of running 1.5G and 850000uV on other SKUs. Linux
doesn't control it.

Thanks
Varada
> > +                       opp-supported-hw = <0x3>;
> >                         clock-latency-ns = <200000>;
> >                 };
> >         };
> > @@ -150,6 +173,11 @@
> >                         reg = <0x000a4000 0x721>;
> >                         #address-cells = <1>;
> >                         #size-cells = <1>;
> > +
> > +                       cpu_speed_bin: cpu_speed_bin@1d {
> > +                               reg = <0x1d 0x2>;
> > +                               bits = <7 2>;
> > +                       };
> >                 };
> >
> >                 rng: rng@e3000 {
> > --
> > 2.7.4
> >
>
>
> --
> With best wishes
> Dmitry
Dmitry Baryshkov Oct. 5, 2023, 11:39 a.m. UTC | #4
On Thu, 5 Oct 2023 at 12:58, Varadarajan Narayanan
<quic_varada@quicinc.com> wrote:
>
> On Thu, Sep 07, 2023 at 04:59:28PM +0300, Dmitry Baryshkov wrote:
> > On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
> > <quic_varada@quicinc.com> wrote:
> > >
> > > IPQ53xx have different OPPs available for the CPU based on
> > > SoC variant. This can be determined through use of an eFuse
> > > register present in the silicon.
> > >
> > > Add support to read the eFuse and populate the OPPs based on it.
> > >
> > > Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> > > ---
> > >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
> > >  1 file changed, 31 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > index 82761ae..3ca3f34 100644
> > > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > @@ -91,11 +91,34 @@
> > >         };
> > >
> > >         cpu_opp_table: opp-table-cpu {
> > > -               compatible = "operating-points-v2";
> > > +               compatible = "operating-points-v2-kryo-cpu";
> > >                 opp-shared;
> > > +               nvmem-cells = <&cpu_speed_bin>;
> > > +               nvmem-cell-names = "speed_bin";
> > > +
> > > +               /*
> > > +                * Listed all supported CPU frequencies and opp-supported-hw
> > > +                * values to select CPU frequencies based on the limits fused.
> > > +                * ------------------------------------------------------------
> > > +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> > > +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> > > +                * ------------------------------------------------------------
> > > +                * 1100000000     1      1      1       1            0xF
> > > +                * 1500000000     0      0      1       1            0x3
> > > +                * -----------------------------------------------------------
> > > +                */
> >
> > This can probably go to the commit message instead.
>
> Ok
>
> > > +
> > > +               opp-1100000000 {
> > > +                       opp-hz = /bits/ 64 <1100000000>;
> >
> > But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz
>
> Will update it.
>
> > > +                       opp-microvolt = <850000>;
> > > +                       opp-supported-hw = <0xF>;
> > > +                       clock-latency-ns = <200000>;
> > > +               };
> > >
> > > -               opp-1488000000 {
> > > -                       opp-hz = /bits/ 64 <1488000000>;
> > > +               opp-1500000000 {
> > > +                       opp-hz = /bits/ 64 <1500000000>;
> >
> > So, 1.488 GHz or 1.5 GHz?
>
> 1.5 GHz
>
> > > +                       opp-microvolt = <950000>;
> >
> > Which regulator is controlled by this microvolt?
>
> Based on the SKU, the XBL sets up the regulator to provide 950000uV
> on CPUs capable of running 1.5G and 850000uV on other SKUs. Linux
> doesn't control it.

Then why do you need this property here in the first place?
Varadarajan Narayanan Oct. 5, 2023, 2:42 p.m. UTC | #5
On Thu, Oct 05, 2023 at 02:39:43PM +0300, Dmitry Baryshkov wrote:
> On Thu, 5 Oct 2023 at 12:58, Varadarajan Narayanan
> <quic_varada@quicinc.com> wrote:
> >
> > On Thu, Sep 07, 2023 at 04:59:28PM +0300, Dmitry Baryshkov wrote:
> > > On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
> > > <quic_varada@quicinc.com> wrote:
> > > >
> > > > IPQ53xx have different OPPs available for the CPU based on
> > > > SoC variant. This can be determined through use of an eFuse
> > > > register present in the silicon.
> > > >
> > > > Add support to read the eFuse and populate the OPPs based on it.
> > > >
> > > > Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> > > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> > > > ---
> > > >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
> > > >  1 file changed, 31 insertions(+), 3 deletions(-)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > index 82761ae..3ca3f34 100644
> > > > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > @@ -91,11 +91,34 @@
> > > >         };
> > > >
> > > >         cpu_opp_table: opp-table-cpu {
> > > > -               compatible = "operating-points-v2";
> > > > +               compatible = "operating-points-v2-kryo-cpu";
> > > >                 opp-shared;
> > > > +               nvmem-cells = <&cpu_speed_bin>;
> > > > +               nvmem-cell-names = "speed_bin";
> > > > +
> > > > +               /*
> > > > +                * Listed all supported CPU frequencies and opp-supported-hw
> > > > +                * values to select CPU frequencies based on the limits fused.
> > > > +                * ------------------------------------------------------------
> > > > +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> > > > +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> > > > +                * ------------------------------------------------------------
> > > > +                * 1100000000     1      1      1       1            0xF
> > > > +                * 1500000000     0      0      1       1            0x3
> > > > +                * -----------------------------------------------------------
> > > > +                */
> > >
> > > This can probably go to the commit message instead.
> >
> > Ok
> >
> > > > +
> > > > +               opp-1100000000 {
> > > > +                       opp-hz = /bits/ 64 <1100000000>;
> > >
> > > But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz
> >
> > Will update it.
> >
> > > > +                       opp-microvolt = <850000>;
> > > > +                       opp-supported-hw = <0xF>;
> > > > +                       clock-latency-ns = <200000>;
> > > > +               };
> > > >
> > > > -               opp-1488000000 {
> > > > -                       opp-hz = /bits/ 64 <1488000000>;
> > > > +               opp-1500000000 {
> > > > +                       opp-hz = /bits/ 64 <1500000000>;
> > >
> > > So, 1.488 GHz or 1.5 GHz?
> >
> > 1.5 GHz
> >
> > > > +                       opp-microvolt = <950000>;
> > >
> > > Which regulator is controlled by this microvolt?
> >
> > Based on the SKU, the XBL sets up the regulator to provide 950000uV
> > on CPUs capable of running 1.5G and 850000uV on other SKUs. Linux
> > doesn't control it.
>
> Then why do you need this property here in the first place?

I get these errors without this property

[    1.018065] cpu cpu0: opp_parse_microvolt: opp-microvolt missing although OPP managing regulators
[    1.018074] cpu cpu0: _of_add_opp_table_v2: Failed to add OPP, -22

Thanks
Varada
Dmitry Baryshkov Oct. 5, 2023, 7:39 p.m. UTC | #6
On Thu, 5 Oct 2023 at 17:42, Varadarajan Narayanan
<quic_varada@quicinc.com> wrote:
>
> On Thu, Oct 05, 2023 at 02:39:43PM +0300, Dmitry Baryshkov wrote:
> > On Thu, 5 Oct 2023 at 12:58, Varadarajan Narayanan
> > <quic_varada@quicinc.com> wrote:
> > >
> > > On Thu, Sep 07, 2023 at 04:59:28PM +0300, Dmitry Baryshkov wrote:
> > > > On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
> > > > <quic_varada@quicinc.com> wrote:
> > > > >
> > > > > IPQ53xx have different OPPs available for the CPU based on
> > > > > SoC variant. This can be determined through use of an eFuse
> > > > > register present in the silicon.
> > > > >
> > > > > Add support to read the eFuse and populate the OPPs based on it.
> > > > >
> > > > > Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> > > > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> > > > > ---
> > > > >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
> > > > >  1 file changed, 31 insertions(+), 3 deletions(-)
> > > > >
> > > > > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > index 82761ae..3ca3f34 100644
> > > > > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > @@ -91,11 +91,34 @@
> > > > >         };
> > > > >
> > > > >         cpu_opp_table: opp-table-cpu {
> > > > > -               compatible = "operating-points-v2";
> > > > > +               compatible = "operating-points-v2-kryo-cpu";
> > > > >                 opp-shared;
> > > > > +               nvmem-cells = <&cpu_speed_bin>;
> > > > > +               nvmem-cell-names = "speed_bin";
> > > > > +
> > > > > +               /*
> > > > > +                * Listed all supported CPU frequencies and opp-supported-hw
> > > > > +                * values to select CPU frequencies based on the limits fused.
> > > > > +                * ------------------------------------------------------------
> > > > > +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> > > > > +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> > > > > +                * ------------------------------------------------------------
> > > > > +                * 1100000000     1      1      1       1            0xF
> > > > > +                * 1500000000     0      0      1       1            0x3
> > > > > +                * -----------------------------------------------------------
> > > > > +                */
> > > >
> > > > This can probably go to the commit message instead.
> > >
> > > Ok
> > >
> > > > > +
> > > > > +               opp-1100000000 {
> > > > > +                       opp-hz = /bits/ 64 <1100000000>;
> > > >
> > > > But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz
> > >
> > > Will update it.
> > >
> > > > > +                       opp-microvolt = <850000>;
> > > > > +                       opp-supported-hw = <0xF>;
> > > > > +                       clock-latency-ns = <200000>;
> > > > > +               };
> > > > >
> > > > > -               opp-1488000000 {
> > > > > -                       opp-hz = /bits/ 64 <1488000000>;
> > > > > +               opp-1500000000 {
> > > > > +                       opp-hz = /bits/ 64 <1500000000>;
> > > >
> > > > So, 1.488 GHz or 1.5 GHz?
> > >
> > > 1.5 GHz
> > >
> > > > > +                       opp-microvolt = <950000>;
> > > >
> > > > Which regulator is controlled by this microvolt?
> > >
> > > Based on the SKU, the XBL sets up the regulator to provide 950000uV
> > > on CPUs capable of running 1.5G and 850000uV on other SKUs. Linux
> > > doesn't control it.
> >
> > Then why do you need this property here in the first place?
>
> I get these errors without this property
>
> [    1.018065] cpu cpu0: opp_parse_microvolt: opp-microvolt missing although OPP managing regulators

But you have said that "Linux doesn't control it" [the regulator]!

> [    1.018074] cpu cpu0: _of_add_opp_table_v2: Failed to add OPP, -22
Varadarajan Narayanan Oct. 12, 2023, 10:11 a.m. UTC | #7
On Thu, Oct 05, 2023 at 10:39:55PM +0300, Dmitry Baryshkov wrote:
> On Thu, 5 Oct 2023 at 17:42, Varadarajan Narayanan
> <quic_varada@quicinc.com> wrote:
> >
> > On Thu, Oct 05, 2023 at 02:39:43PM +0300, Dmitry Baryshkov wrote:
> > > On Thu, 5 Oct 2023 at 12:58, Varadarajan Narayanan
> > > <quic_varada@quicinc.com> wrote:
> > > >
> > > > On Thu, Sep 07, 2023 at 04:59:28PM +0300, Dmitry Baryshkov wrote:
> > > > > On Thu, 7 Sept 2023 at 08:23, Varadarajan Narayanan
> > > > > <quic_varada@quicinc.com> wrote:
> > > > > >
> > > > > > IPQ53xx have different OPPs available for the CPU based on
> > > > > > SoC variant. This can be determined through use of an eFuse
> > > > > > register present in the silicon.
> > > > > >
> > > > > > Add support to read the eFuse and populate the OPPs based on it.
> > > > > >
> > > > > > Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
> > > > > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
> > > > > > ---
> > > > > >  arch/arm64/boot/dts/qcom/ipq5332.dtsi | 34 +++++++++++++++++++++++++++++++---
> > > > > >  1 file changed, 31 insertions(+), 3 deletions(-)
> > > > > >
> > > > > > diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > > index 82761ae..3ca3f34 100644
> > > > > > --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > > +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
> > > > > > @@ -91,11 +91,34 @@
> > > > > >         };
> > > > > >
> > > > > >         cpu_opp_table: opp-table-cpu {
> > > > > > -               compatible = "operating-points-v2";
> > > > > > +               compatible = "operating-points-v2-kryo-cpu";
> > > > > >                 opp-shared;
> > > > > > +               nvmem-cells = <&cpu_speed_bin>;
> > > > > > +               nvmem-cell-names = "speed_bin";
> > > > > > +
> > > > > > +               /*
> > > > > > +                * Listed all supported CPU frequencies and opp-supported-hw
> > > > > > +                * values to select CPU frequencies based on the limits fused.
> > > > > > +                * ------------------------------------------------------------
> > > > > > +                * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
> > > > > > +                *              1.0GHz 1.2GHz 1.5GHz No Limit
> > > > > > +                * ------------------------------------------------------------
> > > > > > +                * 1100000000     1      1      1       1            0xF
> > > > > > +                * 1500000000     0      0      1       1            0x3
> > > > > > +                * -----------------------------------------------------------
> > > > > > +                */
> > > > >
> > > > > This can probably go to the commit message instead.
> > > >
> > > > Ok
> > > >
> > > > > > +
> > > > > > +               opp-1100000000 {
> > > > > > +                       opp-hz = /bits/ 64 <1100000000>;
> > > > >
> > > > > But your table shows 1.0 GHz and 1.2 GHz instead of 1.1 GHz
> > > >
> > > > Will update it.
> > > >
> > > > > > +                       opp-microvolt = <850000>;
> > > > > > +                       opp-supported-hw = <0xF>;
> > > > > > +                       clock-latency-ns = <200000>;
> > > > > > +               };
> > > > > >
> > > > > > -               opp-1488000000 {
> > > > > > -                       opp-hz = /bits/ 64 <1488000000>;
> > > > > > +               opp-1500000000 {
> > > > > > +                       opp-hz = /bits/ 64 <1500000000>;
> > > > >
> > > > > So, 1.488 GHz or 1.5 GHz?
> > > >
> > > > 1.5 GHz
> > > >
> > > > > > +                       opp-microvolt = <950000>;
> > > > >
> > > > > Which regulator is controlled by this microvolt?
> > > >
> > > > Based on the SKU, the XBL sets up the regulator to provide 950000uV
> > > > on CPUs capable of running 1.5G and 850000uV on other SKUs. Linux
> > > > doesn't control it.
> > >
> > > Then why do you need this property here in the first place?
> >
> > I get these errors without this property
> >
> > [    1.018065] cpu cpu0: opp_parse_microvolt: opp-microvolt missing although OPP managing regulators
>
> But you have said that "Linux doesn't control it" [the regulator]!

Got confused between the ipq9574 and ipq5332 patches.
Have removed and addressed other comments too and
posted v2 - https://lore.kernel.org/linux-arm-msm/cover.1697101543.git.quic_varada@quicinc.com/

Please take a look.

Thanks
Varada
>
> > [    1.018074] cpu cpu0: _of_add_opp_table_v2: Failed to add OPP, -22
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
index 82761ae..3ca3f34 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
@@ -91,11 +91,34 @@ 
 	};
 
 	cpu_opp_table: opp-table-cpu {
-		compatible = "operating-points-v2";
+		compatible = "operating-points-v2-kryo-cpu";
 		opp-shared;
+		nvmem-cells = <&cpu_speed_bin>;
+		nvmem-cell-names = "speed_bin";
+
+		/*
+		 * Listed all supported CPU frequencies and opp-supported-hw
+		 * values to select CPU frequencies based on the limits fused.
+		 * ------------------------------------------------------------
+		 * Frequency     BIT3   BIT2   BIT1    BIT0    opp-supported-hw
+		 *              1.0GHz 1.2GHz 1.5GHz No Limit
+		 * ------------------------------------------------------------
+		 * 1100000000     1      1      1       1            0xF
+		 * 1500000000     0      0      1       1            0x3
+		 * -----------------------------------------------------------
+		 */
+
+		opp-1100000000 {
+			opp-hz = /bits/ 64 <1100000000>;
+			opp-microvolt = <850000>;
+			opp-supported-hw = <0xF>;
+			clock-latency-ns = <200000>;
+		};
 
-		opp-1488000000 {
-			opp-hz = /bits/ 64 <1488000000>;
+		opp-1500000000 {
+			opp-hz = /bits/ 64 <1500000000>;
+			opp-microvolt = <950000>;
+			opp-supported-hw = <0x3>;
 			clock-latency-ns = <200000>;
 		};
 	};
@@ -150,6 +173,11 @@ 
 			reg = <0x000a4000 0x721>;
 			#address-cells = <1>;
 			#size-cells = <1>;
+
+			cpu_speed_bin: cpu_speed_bin@1d {
+				reg = <0x1d 0x2>;
+				bits = <7 2>;
+			};
 		};
 
 		rng: rng@e3000 {