| Message ID | 1488813822-26042-5-git-send-email-d-gerlach@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, 6 Mar 2017 09:23:41 -0600 Dave Gerlach <d-gerlach@ti.com> wrote: > After the ti-cpufreq driver has been added, we can now drop the > operating-points table present in dra7.dtsi for the cpu and add an > operating-points-v2 table with all OPPs available for all silicon > revisions. Also add necessary data for use by ti-cpufreq to > selectively enable the appropriate OPPs at runtime as part of the > operating-points table. > > As we now need to define voltage ranges for each OPP, we define the > minimum and maximum voltage to match the ranges possible for AVS > class0 voltage as defined by the DRA7/AM57 Data Manual, with the > exception of using a range for OPP_OD based on historical data to > ensure that SoCs from older lots still continue to boot, even though > more optimal voltages are now the standard. Once an AVS Class0 driver > is in place it will be possible for these OPP voltages to be adjusted > to any voltage within the provided range. > > Information from SPRS953, Revised December 2015. > > Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Reviewed-by: Lukasz Majewski <lukma@denx.de> > --- > arch/arm/boot/dts/dra7.dtsi | 24 +++++++++++++++++++----- > arch/arm/boot/dts/dra74x.dtsi | 5 +++++ > 2 files changed, 24 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi > index 2c9e56f4aac5..e9dc314b0dcf 100644 > --- a/arch/arm/boot/dts/dra7.dtsi > +++ b/arch/arm/boot/dts/dra7.dtsi > @@ -81,11 +81,7 @@ > compatible = "arm,cortex-a15"; > reg = <0>; > > - operating-points = < > - /* kHz uV */ > - 1000000 1060000 > - 1176000 1160000 > - >; > + operating-points-v2 = <&cpu0_opp_table>; > > clocks = <&dpll_mpu_ck>; > clock-names = "cpu"; > @@ -99,6 +95,24 @@ > }; > }; > > + cpu0_opp_table: opp-table { > + compatible = "operating-points-v2-ti-cpu"; > + syscon = <&scm_wkup>; > + > + opp_nom@1000000000 { > + opp-hz = /bits/ 64 <1000000000>; > + opp-microvolt = <1060000 850000 1150000>; > + opp-supported-hw = <0xFF 0x01>; > + opp-suspend; > + }; > + > + opp_od@1176000000 { > + opp-hz = /bits/ 64 <1176000000>; > + opp-microvolt = <1160000 885000 1160000>; > + opp-supported-hw = <0xFF 0x02>; > + }; > + }; > + > /* > * The soc node represents the soc top level view. It is > used for IPs > * that are not memory mapped in the MPU view or for the MPU > itself. diff --git a/arch/arm/boot/dts/dra74x.dtsi > b/arch/arm/boot/dts/dra74x.dtsi index 0a78347e6615..24e6746c5b26 > 100644 --- a/arch/arm/boot/dts/dra74x.dtsi > +++ b/arch/arm/boot/dts/dra74x.dtsi > @@ -17,6 +17,7 @@ > device_type = "cpu"; > compatible = "arm,cortex-a15"; > reg = <1>; > + operating-points-v2 = <&cpu0_opp_table>; > }; > }; > > @@ -79,6 +80,10 @@ > }; > }; > > +&cpu0_opp_table { > + opp-shared; > +}; > + > &dss { > reg = <0x58000000 0x80>, > <0x58004054 0x4>, Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi index 2c9e56f4aac5..e9dc314b0dcf 100644 --- a/arch/arm/boot/dts/dra7.dtsi +++ b/arch/arm/boot/dts/dra7.dtsi @@ -81,11 +81,7 @@ compatible = "arm,cortex-a15"; reg = <0>; - operating-points = < - /* kHz uV */ - 1000000 1060000 - 1176000 1160000 - >; + operating-points-v2 = <&cpu0_opp_table>; clocks = <&dpll_mpu_ck>; clock-names = "cpu"; @@ -99,6 +95,24 @@ }; }; + cpu0_opp_table: opp-table { + compatible = "operating-points-v2-ti-cpu"; + syscon = <&scm_wkup>; + + opp_nom@1000000000 { + opp-hz = /bits/ 64 <1000000000>; + opp-microvolt = <1060000 850000 1150000>; + opp-supported-hw = <0xFF 0x01>; + opp-suspend; + }; + + opp_od@1176000000 { + opp-hz = /bits/ 64 <1176000000>; + opp-microvolt = <1160000 885000 1160000>; + opp-supported-hw = <0xFF 0x02>; + }; + }; + /* * The soc node represents the soc top level view. It is used for IPs * that are not memory mapped in the MPU view or for the MPU itself. diff --git a/arch/arm/boot/dts/dra74x.dtsi b/arch/arm/boot/dts/dra74x.dtsi index 0a78347e6615..24e6746c5b26 100644 --- a/arch/arm/boot/dts/dra74x.dtsi +++ b/arch/arm/boot/dts/dra74x.dtsi @@ -17,6 +17,7 @@ device_type = "cpu"; compatible = "arm,cortex-a15"; reg = <1>; + operating-points-v2 = <&cpu0_opp_table>; }; }; @@ -79,6 +80,10 @@ }; }; +&cpu0_opp_table { + opp-shared; +}; + &dss { reg = <0x58000000 0x80>, <0x58004054 0x4>,
After the ti-cpufreq driver has been added, we can now drop the operating-points table present in dra7.dtsi for the cpu and add an operating-points-v2 table with all OPPs available for all silicon revisions. Also add necessary data for use by ti-cpufreq to selectively enable the appropriate OPPs at runtime as part of the operating-points table. As we now need to define voltage ranges for each OPP, we define the minimum and maximum voltage to match the ranges possible for AVS class0 voltage as defined by the DRA7/AM57 Data Manual, with the exception of using a range for OPP_OD based on historical data to ensure that SoCs from older lots still continue to boot, even though more optimal voltages are now the standard. Once an AVS Class0 driver is in place it will be possible for these OPP voltages to be adjusted to any voltage within the provided range. Information from SPRS953, Revised December 2015. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> --- arch/arm/boot/dts/dra7.dtsi | 24 +++++++++++++++++++----- arch/arm/boot/dts/dra74x.dtsi | 5 +++++ 2 files changed, 24 insertions(+), 5 deletions(-)