From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH] ARM: dts: dra7-evm: Keep all VDD rails always-on Date: Mon, 10 Nov 2014 12:39:23 -0800 Message-ID: <20141110203922.GX31454@atomide.com> References: <1413902290-304-1-git-send-email-nm@ti.com> <54579476.10702@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <54579476.10702-l0cyMroinI0@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Roger Quadros Cc: Nishanth Menon , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org * Roger Quadros [141103 06:44]: > Hi Nishant, > > On 10/21/2014 05:38 PM, Nishanth Menon wrote: > > DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All > > unused power supply balls must be supplied with the voltages specified > > in the Section 5.2, Recommended Operating Conditions". > > > > This implies that all unused voltage rails for Vayu can never be > > switched off even if the hardware blocks inside that voltage domain is > > unused. Switching off these unused rails may result in stability issues > > on other domains and increased leakage and power-on-hour impacts. > > > > J6eco-evm dts file already considers this, however j6evm-dts file needs > > to be fixed to consider this constraint of the SoC. > > > > Signed-off-by: Nishanth Menon > > Acked-by: Roger Quadros > > I'm assuming that vddshv8 (MMC1 power group) can be switched off. Applying into omap-for-v3.19/dt thanks. Tony -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html