* Roger Quadros <rogerq@xxxxxx> [140704 02:57]: > After clarification from the hardware team it was found that > this 1.8V PHY supply can't be switched OFF when SoC is Active. > > Since the PHY IPs don't contain isolation logic built in the design to > allow the power rail to be switched off, there is a very high risk > of IP reliability and additional leakage paths which can result in > additional power consumption. > > The only scenario where this rail can be switched off is part of Power on > reset sequencing, but it needs to be kept always-on during operation. > > This patch is required for proper functionality of USB, SATA > and PCIe on DRA7-evm. > > CC: Rajendra Nayak <rnayak@xxxxxx> > CC: Tero Kristo <t-kristo@xxxxxx> > Signed-off-by: Roger Quadros <rogerq@xxxxxx> Best that you queue this with the series: Acked-by: Tony Lindgren <tony@xxxxxxxxxxx> > --- > arch/arm/boot/dts/dra7-evm.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts > index 4adc280..8308954 100644 > --- a/arch/arm/boot/dts/dra7-evm.dts > +++ b/arch/arm/boot/dts/dra7-evm.dts > @@ -240,6 +240,7 @@ > regulator-name = "ldo3"; > regulator-min-microvolt = <1800000>; > regulator-max-microvolt = <1800000>; > + regulator-always-on; > regulator-boot-on; > }; > > -- > 1.8.3.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
