| Message ID | 1413902290-304-1-git-send-email-nm@ti.com |
|---|---|
| State | Accepted |
| Commit | 395b23ca57b46e79d7956ce1d5a9381dc6fe0e3a |
| Headers | show |
Hi Nishant, On 10/21/2014 05:38 PM, Nishanth Menon wrote: > DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All > unused power supply balls must be supplied with the voltages specified > in the Section 5.2, Recommended Operating Conditions". > > This implies that all unused voltage rails for Vayu can never be > switched off even if the hardware blocks inside that voltage domain is > unused. Switching off these unused rails may result in stability issues > on other domains and increased leakage and power-on-hour impacts. > > J6eco-evm dts file already considers this, however j6evm-dts file needs > to be fixed to consider this constraint of the SoC. > > Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Roger Quadros <rogerq@ti.com> I'm assuming that vddshv8 (MMC1 power group) can be switched off. cheers, -roger > --- > > Patch is based on v3.18-rc1 tag. > > arch/arm/boot/dts/dra7-evm.dts | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts > index c6ce625..4f4c469 100644 > --- a/arch/arm/boot/dts/dra7-evm.dts > +++ b/arch/arm/boot/dts/dra7-evm.dts > @@ -201,6 +201,7 @@ > regulator-name = "smps45"; > regulator-min-microvolt = < 850000>; > regulator-max-microvolt = <1150000>; > + regulator-always-on; > regulator-boot-on; > }; > > @@ -209,6 +210,7 @@ > regulator-name = "smps6"; > regulator-min-microvolt = <850000>; > regulator-max-microvolt = <12500000>; > + regulator-always-on; > regulator-boot-on; > }; > > @@ -226,6 +228,7 @@ > regulator-name = "smps8"; > regulator-min-microvolt = < 850000>; > regulator-max-microvolt = <1250000>; > + regulator-always-on; > regulator-boot-on; > }; > > @@ -252,6 +255,7 @@ > regulator-name = "ldo2"; > regulator-min-microvolt = <3300000>; > regulator-max-microvolt = <3300000>; > + regulator-always-on; > regulator-boot-on; > }; > > @@ -269,6 +273,7 @@ > regulator-name = "ldo9"; > regulator-min-microvolt = <1050000>; > regulator-max-microvolt = <1050000>; > + regulator-always-on; > regulator-boot-on; > }; > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
* Roger Quadros <rogerq@ti.com> [141103 06:44]: > Hi Nishant, > > On 10/21/2014 05:38 PM, Nishanth Menon wrote: > > DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All > > unused power supply balls must be supplied with the voltages specified > > in the Section 5.2, Recommended Operating Conditions". > > > > This implies that all unused voltage rails for Vayu can never be > > switched off even if the hardware blocks inside that voltage domain is > > unused. Switching off these unused rails may result in stability issues > > on other domains and increased leakage and power-on-hour impacts. > > > > J6eco-evm dts file already considers this, however j6evm-dts file needs > > to be fixed to consider this constraint of the SoC. > > > > Signed-off-by: Nishanth Menon <nm@ti.com> > > Acked-by: Roger Quadros <rogerq@ti.com> > > I'm assuming that vddshv8 (MMC1 power group) can be switched off. Applying into omap-for-v3.19/dt thanks. Tony -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts index c6ce625..4f4c469 100644 --- a/arch/arm/boot/dts/dra7-evm.dts +++ b/arch/arm/boot/dts/dra7-evm.dts @@ -201,6 +201,7 @@ regulator-name = "smps45"; regulator-min-microvolt = < 850000>; regulator-max-microvolt = <1150000>; + regulator-always-on; regulator-boot-on; }; @@ -209,6 +210,7 @@ regulator-name = "smps6"; regulator-min-microvolt = <850000>; regulator-max-microvolt = <12500000>; + regulator-always-on; regulator-boot-on; }; @@ -226,6 +228,7 @@ regulator-name = "smps8"; regulator-min-microvolt = < 850000>; regulator-max-microvolt = <1250000>; + regulator-always-on; regulator-boot-on; }; @@ -252,6 +255,7 @@ regulator-name = "ldo2"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; + regulator-always-on; regulator-boot-on; }; @@ -269,6 +273,7 @@ regulator-name = "ldo9"; regulator-min-microvolt = <1050000>; regulator-max-microvolt = <1050000>; + regulator-always-on; regulator-boot-on; };
DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All unused power supply balls must be supplied with the voltages specified in the Section 5.2, Recommended Operating Conditions". This implies that all unused voltage rails for Vayu can never be switched off even if the hardware blocks inside that voltage domain is unused. Switching off these unused rails may result in stability issues on other domains and increased leakage and power-on-hour impacts. J6eco-evm dts file already considers this, however j6evm-dts file needs to be fixed to consider this constraint of the SoC. Signed-off-by: Nishanth Menon <nm@ti.com> --- Patch is based on v3.18-rc1 tag. arch/arm/boot/dts/dra7-evm.dts | 5 +++++ 1 file changed, 5 insertions(+)