| Message ID | 20190321141010.19612-3-brgl@bgdev.pl (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: da850: enable cpufreq in DT mode | expand |
On 3/21/19 9:10 AM, Bartosz Golaszewski wrote: > From: David Lechner <david@lechnology.com> > > This adds a cpu node and operating points to the common da850.dtsi file. > > Additionally, a regulator is added to the LEGO EV3 board along with > some board-specific CPU configuration. Should mention the LCDK board here as well since it is included in this patch. > > Regulators need to be hooked up on other boards to get them working. > > Signed-off-by: David Lechner <david@lechnology.com> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> > --- > arch/arm/boot/dts/da850-lcdk.dts | 31 +++++++++++++++ > arch/arm/boot/dts/da850-lego-ev3.dts | 30 +++++++++++++++ > arch/arm/boot/dts/da850.dtsi | 56 ++++++++++++++++++++++++++++ > 3 files changed, 117 insertions(+) > > diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts > index 26f453dc8370..f29ed9010812 100644 > --- a/arch/arm/boot/dts/da850-lcdk.dts > +++ b/arch/arm/boot/dts/da850-lcdk.dts > @@ -155,12 +155,43 @@ > }; > }; > }; > + > + cvdd: regulator0 { > + compatible = "regulator-fixed"; > + regulator-name = "cvdd"; > + regulator-min-microvolt = <1300000>; > + regulator-max-microvolt = <1300000>; > + regulator-always-on; > + regulator-boot-on; > + }; > }; > > &ref_clk { > clock-frequency = <24000000>; > }; > > +&cpu { > + cpu-supply = <&cvdd>; > +}; > + > +/* LCDK has a fixed CVDD of 1.3V, so only op points >= 300MHz are valid */ > + > +&opp_100 { > + status = "disabled"; > +}; > + > +&opp_200 { > + status = "disabled"; > +}; > + > +&opp_375 { > + status = "okay"; > +}; > + > +&opp_456 { > + status = "okay"; > +}; > + > &pmx_core { > status = "okay"; > > diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts > index 66fcadf0ba91..553717f84483 100644 > --- a/arch/arm/boot/dts/da850-lego-ev3.dts > +++ b/arch/arm/boot/dts/da850-lego-ev3.dts > @@ -125,6 +125,15 @@ > amp-supply = <&>; > }; > > + cvdd: regulator0 { > + compatible = "regulator-fixed"; > + regulator-name = "cvdd"; > + regulator-min-microvolt = <1200000>; > + regulator-max-microvolt = <1200000>; > + regulator-always-on; > + regulator-boot-on; > + }; > + > /* > * This is a 5V current limiting regulator that is shared by USB, > * the sensor (input) ports, the motor (output) ports and the A/DC. > @@ -204,6 +213,27 @@ > clock-frequency = <24000000>; > }; > > +&cpu { > + cpu-supply = <&cvdd>; > +}; > + > +/* since we have a fixed regulator, we can't run at these points */ > +&opp_100 { > + status = "disabled"; > +}; > + > +&opp_200 { > + status = "disabled"; > +}; > + > +/* > + * The SoC is actually the 456MHz version, but because of the fixed regulator > + * This is the fastest we can go. > + */ > +&opp_375 { > + status = "okay"; > +}; > + > &pmx_core { > status = "okay"; > > diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi > index 559659b399d0..ee61d1253b58 100644 > --- a/arch/arm/boot/dts/da850.dtsi > +++ b/arch/arm/boot/dts/da850.dtsi > @@ -20,6 +20,62 @@ > reg = <0xc0000000 0x0>; > }; > > + cpus { > + #address-cells = <1>; > + #size-cells = <0>; > + > + cpu: cpu@0 { > + compatible = "arm,arm926ej-s"; > + device_type = "cpu"; > + reg = <0>; > + clocks = <&psc0 14>; > + operating-points-v2 = <&opp_table>; > + }; > + }; > + > + opp_table: opp-table { > + compatible = "operating-points-v2"; > + > + opp_100: opp100-100000000 { > + opp-hz = /bits/ 64 <100000000>; > + opp-microvolt = <1000000 950000 1050000>; > + }; > + > + opp_200: opp110-200000000 { > + opp-hz = /bits/ 64 <200000000>; > + opp-microvolt = <1100000 1050000 1160000>; > + }; > + > + opp_300: opp120-300000000 { > + opp-hz = /bits/ 64 <300000000>; > + opp-microvolt = <1200000 1140000 1320000>; > + }; > + > + /* > + * Original silicon was 300MHz max, so higher frequencies > + * need to be enabled on a per-board basis if the chip is > + * capable. > + */ > + > + opp_375: opp120-375000000 { > + status = "disabled"; > + opp-hz = /bits/ 64 <375000000>; > + opp-microvolt = <1200000 1140000 1320000>; > + }; > + > + opp_415: opp130-415000000 { > + status = "disabled"; > + opp-hz = /bits/ 64 <415000000>; > + opp-microvolt = <1300000 1250000 1350000>; > + }; I just made this point (415MHz) up for experimenting with undervolting before going all the way to 456MHz at 1.2V. I'm not sure if it is actually useful to anyone else. > + > + opp_456: opp130-456000000 { > + status = "disabled"; > + opp-hz = /bits/ 64 <456000000>; > + opp-microvolt = <1300000 1250000 1350000>; > + }; > + }; > + > arm { > #address-cells = <1>; > #size-cells = <1>; >
diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts index 26f453dc8370..f29ed9010812 100644 --- a/arch/arm/boot/dts/da850-lcdk.dts +++ b/arch/arm/boot/dts/da850-lcdk.dts @@ -155,12 +155,43 @@ }; }; }; + + cvdd: regulator0 { + compatible = "regulator-fixed"; + regulator-name = "cvdd"; + regulator-min-microvolt = <1300000>; + regulator-max-microvolt = <1300000>; + regulator-always-on; + regulator-boot-on; + }; }; &ref_clk { clock-frequency = <24000000>; }; +&cpu { + cpu-supply = <&cvdd>; +}; + +/* LCDK has a fixed CVDD of 1.3V, so only op points >= 300MHz are valid */ + +&opp_100 { + status = "disabled"; +}; + +&opp_200 { + status = "disabled"; +}; + +&opp_375 { + status = "okay"; +}; + +&opp_456 { + status = "okay"; +}; + &pmx_core { status = "okay"; diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts index 66fcadf0ba91..553717f84483 100644 --- a/arch/arm/boot/dts/da850-lego-ev3.dts +++ b/arch/arm/boot/dts/da850-lego-ev3.dts @@ -125,6 +125,15 @@ amp-supply = <&>; }; + cvdd: regulator0 { + compatible = "regulator-fixed"; + regulator-name = "cvdd"; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + regulator-always-on; + regulator-boot-on; + }; + /* * This is a 5V current limiting regulator that is shared by USB, * the sensor (input) ports, the motor (output) ports and the A/DC. @@ -204,6 +213,27 @@ clock-frequency = <24000000>; }; +&cpu { + cpu-supply = <&cvdd>; +}; + +/* since we have a fixed regulator, we can't run at these points */ +&opp_100 { + status = "disabled"; +}; + +&opp_200 { + status = "disabled"; +}; + +/* + * The SoC is actually the 456MHz version, but because of the fixed regulator + * This is the fastest we can go. + */ +&opp_375 { + status = "okay"; +}; + &pmx_core { status = "okay"; diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi index 559659b399d0..ee61d1253b58 100644 --- a/arch/arm/boot/dts/da850.dtsi +++ b/arch/arm/boot/dts/da850.dtsi @@ -20,6 +20,62 @@ reg = <0xc0000000 0x0>; }; + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu: cpu@0 { + compatible = "arm,arm926ej-s"; + device_type = "cpu"; + reg = <0>; + clocks = <&psc0 14>; + operating-points-v2 = <&opp_table>; + }; + }; + + opp_table: opp-table { + compatible = "operating-points-v2"; + + opp_100: opp100-100000000 { + opp-hz = /bits/ 64 <100000000>; + opp-microvolt = <1000000 950000 1050000>; + }; + + opp_200: opp110-200000000 { + opp-hz = /bits/ 64 <200000000>; + opp-microvolt = <1100000 1050000 1160000>; + }; + + opp_300: opp120-300000000 { + opp-hz = /bits/ 64 <300000000>; + opp-microvolt = <1200000 1140000 1320000>; + }; + + /* + * Original silicon was 300MHz max, so higher frequencies + * need to be enabled on a per-board basis if the chip is + * capable. + */ + + opp_375: opp120-375000000 { + status = "disabled"; + opp-hz = /bits/ 64 <375000000>; + opp-microvolt = <1200000 1140000 1320000>; + }; + + opp_415: opp130-415000000 { + status = "disabled"; + opp-hz = /bits/ 64 <415000000>; + opp-microvolt = <1300000 1250000 1350000>; + }; + + opp_456: opp130-456000000 { + status = "disabled"; + opp-hz = /bits/ 64 <456000000>; + opp-microvolt = <1300000 1250000 1350000>; + }; + }; + arm { #address-cells = <1>; #size-cells = <1>;