Hi Dave, > Hi, > On 02/06/2017 08:24 AM, Lukasz Majewski wrote: > > Hi Dave, > > > >> On 02/03/2017 09:24 AM, Lukasz Majewski wrote: > >>> The "opp_high" property brings support for 1.5 GHz CPU frequency > >>> for TI's am57xx line of processors. > >>> > >>> Signed-off-by: Lukasz Majewski <lukma@xxxxxxx> > >>> --- > >>> arch/arm/boot/dts/dra7.dtsi | 5 +++++ > >>> 1 file changed, 5 insertions(+) > >>> > >> > >> This can't be blindly enabled for all am57xx SoCs, there is a > >> forthcoming ti-cpufreq [1] driver that is needed that will decided > >> which OPPs can and cannot be enabled for the specific variant in > >> use. > > > > Do you know if there is ongoing work on using Avs0 voltage (encoded > > in efuse) to control the per SoC PMIC voltage value when switching > > to opp_high (1.5 GHz)? > > Yes, Viresh Kumar introduced multi-regulator support in the OPP core > recently [1] which I wrote a test driver for here [2] which hooks > into the OPP framework to do both ABB regulator scaling and also > programs the AVS0 voltages. Thanks for sharing this info. > The current implementation I have cleaned > up will depend on the ti-cpufreq driver so once that is merged I will > send the AVS0 and ABB support driver upstream as well. The ti-cpufreq.c seems to be solid and working, so I hope that it will be merged sooner than latter. > If you are > curious you can look at current internal implementation here [3]. I will try it. > > Regards, > Dave > > [1] http://www.spinics.net/lists/devicetree/msg153212.html > [2] https://www.spinics.net/lists/kernel/msg2384336.html > [3] > http://git.ti.com/ti-linux-kernel/ti-linux-kernel/blobs/ti-lsk-linux-4.9.y/drivers/base/power/opp/ti-opp-supply.c > > > > > > > >> > >> Regards, > >> Dave > >> > >> [1] http://www.spinics.net/lists/devicetree/msg158967.html > >> > >>> diff --git a/arch/arm/boot/dts/dra7.dtsi > >>> b/arch/arm/boot/dts/dra7.dtsi index a860a56..5e678cd 100644 > >>> --- a/arch/arm/boot/dts/dra7.dtsi > >>> +++ b/arch/arm/boot/dts/dra7.dtsi > >>> @@ -108,6 +108,11 @@ > >>> opp-hz = /bits/ 64 <1176000000>; > >>> opp-microvolt = <1160000 885000 1160000>; > >>> }; > >>> + > >>> + opp_high@1500000000 { > >>> + opp-hz = /bits/ 64 <1500000000>; > >>> + opp-microvolt = <1210000 950000 1250000>; > >>> + }; > >>> }; > >>> > >>> /* > >>> > >> > > > > > > > > > > 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@xxxxxxx > > > 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@xxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
