From: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
To: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Cc: kishon-l0cyMroinI0@public.gmane.org,
balbi-l0cyMroinI0@public.gmane.org,
nsekhar-l0cyMroinI0@public.gmane.org,
nm-l0cyMroinI0@public.gmane.org,
george.cherian-l0cyMroinI0@public.gmane.org,
sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Rajendra Nayak <rnayak-l0cyMroinI0@public.gmane.org>,
Tero Kristo <t-kristo-l0cyMroinI0@public.gmane.org>
Subject: Re: [PATCH v2 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
Date: Mon, 7 Jul 2014 01:29:22 -0700 [thread overview]
Message-ID: <20140707082922.GI28884@atomide.com> (raw)
In-Reply-To: <1404467748-12154-2-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
* Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org> [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-l0cyMroinI0@public.gmane.org>
> CC: Tero Kristo <t-kristo-l0cyMroinI0@public.gmane.org>
> Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Best that you queue this with the series:
Acked-by: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
> ---
> 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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WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Roger Quadros <rogerq@ti.com>
Cc: kishon@ti.com, balbi@ti.com, nsekhar@ti.com, nm@ti.com,
george.cherian@ti.com, sergei.shtylyov@cogentembedded.com,
linux-omap@vger.kernel.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org, Rajendra Nayak <rnayak@ti.com>,
Tero Kristo <t-kristo@ti.com>
Subject: Re: [PATCH v2 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
Date: Mon, 7 Jul 2014 01:29:22 -0700 [thread overview]
Message-ID: <20140707082922.GI28884@atomide.com> (raw)
In-Reply-To: <1404467748-12154-2-git-send-email-rogerq@ti.com>
* 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
>
next prev parent reply other threads:[~2014-07-07 8:29 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-04 9:55 [PATCH v2 0/6] omap: phy: dra7-evm PHY fixes for 3.16 Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-04 9:55 ` [PATCH v2 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on Roger Quadros
2014-07-04 9:55 ` Roger Quadros
[not found] ` <1404467748-12154-2-git-send-email-rogerq-l0cyMroinI0@public.gmane.org>
2014-07-07 8:29 ` Tony Lindgren [this message]
2014-07-07 8:29 ` Tony Lindgren
2014-07-07 8:34 ` Roger Quadros
2014-07-07 8:34 ` Roger Quadros
2014-07-07 8:44 ` Tony Lindgren
2014-07-04 9:55 ` [PATCH v2 2/6] phy: core: Fix error path in phy_create() Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-04 9:55 ` [PATCH v2 3/6] phy: core: Support regulator supply for PHY power Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-04 9:55 ` [PATCH v2 4/6] phy: core: Add phy-supply to DT binding documentation Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-04 9:55 ` [PATCH v2 5/6] phy: omap-usb2: Balance pm_runtime_enable() on probe failure and remove Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-04 9:55 ` [PATCH v2 6/6] ARM: dts: dra7-evm: Add regulator information to USB2 PHYs Roger Quadros
2014-07-04 9:55 ` Roger Quadros
2014-07-07 8:29 ` Tony Lindgren
-- strict thread matches above, loose matches on Subject: below --
2014-07-02 12:03 [PATCH 0/6] omap: phy: dra7-evm PHY fixes for 3.16 Roger Quadros
2014-07-02 12:03 ` [PATCH 1/6] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on Roger Quadros
2014-07-03 9:40 ` [PATCH v2 " Roger Quadros
2014-07-03 9:40 ` Roger Quadros
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