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 01:44:32 -0700 [thread overview]
Message-ID: <20140707084431.GK28884@atomide.com> (raw)
In-Reply-To: <53BA5B8A.5010805@ti.com>
* Roger Quadros <rogerq@ti.com> [140707 01:36]:
> Hi Tony,
>
> On 07/07/2014 11:29 AM, Tony Lindgren wrote:
> > * 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:
>
> This patch doesn't have any dependency with the others and we're not even sure if
> this series will hit 3.16.
>
> But this 1V8 regulator _is_ required for normal operation of the SoC, whether the
> PHYs are in use or not.
>
> Can you please queue just this patch for SoC fixes for 3.16? Thanks.
OK will do.
Regards,
Tony
next prev parent reply other threads:[~2014-07-07 8:44 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
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 [this message]
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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