Re: [PATCH v2 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on

[Tony Lindgren]

* 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-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/