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SubjectRe: [PATCH v2 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
* Roger Quadros <rogerq@ti.com> [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@ti.com>
> CC: Tero Kristo <t-kristo@ti.com>
> Signed-off-by: Roger Quadros <rogerq@ti.com>

Best that you queue this with the series:

Acked-by: Tony Lindgren <tony@atomide.com>

> ---
> 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
>


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