From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH v2 1/2] regulator: act8865: add input supply handling Date: Sat, 7 Mar 2015 16:34:16 +0000 Message-ID: <20150307163416.GS28806@sirena.org.uk> References: <1709506.shJhJsMxOa@phil> <20150307143922.GM28806@sirena.org.uk> <2033007.teD9r9y7xo@phil> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="tqSMaTz1cCSspCQ4" Return-path: Content-Disposition: inline In-Reply-To: <2033007.teD9r9y7xo@phil> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Heiko Stuebner Cc: Liam Girdwood , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Zubair Lutfullah Kakakhel List-Id: devicetree@vger.kernel.org --tqSMaTz1cCSspCQ4 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sat, Mar 07, 2015 at 04:33:53PM +0100, Heiko Stuebner wrote: > The act88600/act8846/act8865 regulators have a number of input supplies > supplying the individual regulators. This may even be recursively like on > most Rockchip boards using the act8846 where REG4 is most of the time > connected to the inl1-supply. Applied, thanks. The recursive supplies are very common - DCDCs are vastly more efficient than LDOs so if you've got the capacity and care about power it's much better to drop your main supply voltage down to something near the LDO headroom with a DCDC in order to improve system performance. --tqSMaTz1cCSspCQ4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJU+yiHAAoJECTWi3JdVIfQxo8H/jpemBX11o5Qf2mzYZQToU9s vOvdMvt5uUPubOuXnb4XIRCPZt7BoU9j5oFbCeWr6lUs17DpiFargisxcPldJ0K7 9nxfnG4dBl5nzf/kZTNFzoENSLkDECwXSf8EBpBKEdvYzznkB78kfgBDHdYEwSLj 9Pyfgd9RPJ4IsIGv4fcxby+ovHaK8nQqwGkuuTymXpin4/kxkiohXx21aESYLACj /Z+vtAXu3HtiJuXn8IdN++KCC8pq0K8nmop2YR/ipNF4EijCmIAQP3N1FUZvnE79 9uPlOuVZXUxis29IxtkIbQ6A69jFOw01EP4nDwIoGK2lYrMw9g+RpqcQ98TG/o0= =ue8K -----END PGP SIGNATURE----- --tqSMaTz1cCSspCQ4-- -- 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