From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH] ARM: dts: omap4-panda-es: Do not reset gpio1 Date: Thu, 10 Oct 2013 09:47:02 -0700 Message-ID: <20131010164702.GF29913@atomide.com> References: <1381313521-10422-1-git-send-email-rnayak@ti.com> <1381423481-5920-1-git-send-email-nm@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1381423481-5920-1-git-send-email-nm@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Nishanth Menon Cc: =?utf-8?Q?Beno=C3=AEt?= Cousson , Rajendra Nayak , linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org * Nishanth Menon [131010 09:53]: > Do not reset GPIO1 at boot-up because GPIO 7 in GPIO1 block is used on > OMAP4460 PandaBoard-ES to select voltage register in TPS62361 which > supplies VDD_MPU. > > Without this, OMAP4460 PandaBoard-ES boards fail to boot-up because > MPU voltage switches over to VSET0 voltage value (boot voltage) which > is not sufficient to operate the device at OPP100. Is this needs as a fix for the -rc series? Tony > Signed-off-by: Nishanth Menon > --- > As explained here: http://marc.info/?l=u-boot&m=133066647800872&w=2 > > GPIO1 reset causes PandaBoard-ES to stop functioning. > This depends on Patch series from Rajendra: > http://marc.info/?l=linux-doc&m=138131355520116&w=2 > Applies on Benoit's for_13/dts branch: > https://git.kernel.org/cgit/linux/kernel/git/bcousson/linux-omap-dt.git/log/?h=for_3.13/dts > > Tested on PandaBoard-ES without the u-boot uenv hack > > arch/arm/boot/dts/omap4-panda-es.dts | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm/boot/dts/omap4-panda-es.dts b/arch/arm/boot/dts/omap4-panda-es.dts > index 56c4354..816d1c9 100644 > --- a/arch/arm/boot/dts/omap4-panda-es.dts > +++ b/arch/arm/boot/dts/omap4-panda-es.dts > @@ -62,3 +62,7 @@ > gpios = <&gpio1 8 GPIO_ACTIVE_HIGH>; > }; > }; > + > +&gpio1 { > + ti,no-reset-on-init; > +}; > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/