From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCH v5 6/8] dt-bindings: i2c: iproc: add "brcm,iproc-nic-i2c" compatible string Date: Tue, 2 Apr 2019 12:17:57 +0200 Message-ID: <20190402101757.GC2960@kunai> References: <20190214175725.60462-1-ray.jui@broadcom.com> <20190214175725.60462-7-ray.jui@broadcom.com> <20190327222439.GC15396@kunai> <0b97cacd-9bf4-135a-b2ee-1d51ab380b1c@broadcom.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="aT9PWwzfKXlsBJM1" Return-path: Content-Disposition: inline In-Reply-To: <0b97cacd-9bf4-135a-b2ee-1d51ab380b1c@broadcom.com> Sender: linux-kernel-owner@vger.kernel.org To: Ray Jui Cc: Rob Herring , Mark Rutland , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Rayagonda Kokatanur List-Id: devicetree@vger.kernel.org --aT9PWwzfKXlsBJM1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > Note APE is a co-processor that is not visible from the Linux running > from the host processor. >=20 > "brcm,iproc-nic-i2c" here is introduced to allow the I2C port from APE > to be completely owned by the host CPU, to meet the requirement of > certain use cases. At the same time, the control of the I2C port from > APE will be disabled. >=20 > The "brcm,ape-hsls-addr-mask" defines the address translation and be > programmed into some configuration registers to allow the host to > directly access the I2C registers of APE. Note those configuration > registers are owned by the host, and that address is not APE's address > space nor the host is intending to take over the control of APE. >=20 > Therefore, I think it makes way more sense to use an address mask type > of DT property here. Thanks for the explanation! Well, since Rob is already OK with it, then so am I. --aT9PWwzfKXlsBJM1 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAlyjNtEACgkQFA3kzBSg KbZsNhAAqxsHCfBYJ33tztPs31q8C+sO9ENStERBsehhnKVof2x0ArFYXmPzyOU4 J/Fc7OM9vVZhYoogbIxSZvL0ixi/v1WYDCQiyxAEOKOb4kr35gdawRM41KgP9390 9Re6BIB0MdW5pvgoTz2Kypd6StyIHOlinvjC1eSedA4/CXd4n7e5e1k85UqopYpk 7gY1CzTrZ073k/hE6WR9cRmj17TxyWnhQNJw7tmcc+5DUmaOVaNy+n2tUBF40W1a ALldjj+BwY4oIir4jmfGar4DWUBNW8LYKfZHY63FC9CWPkjNNpSA60yH9V2ZM5wd LznGq3MBfS6V4yVGaFHkJRp9BQRgkTe1kLxDrNskDxxYfjVcuavf4c7xgdsIXi+m KDY5voyZxIf5tVq6J/J3fYw2KYn4Ep1DL7RJ0kA/9fmfYD0l+KXTTs+v/ofipWsR N8+0aJ2xH77H8XoFJtaFqdcVtJmZu+RUXq8O2TvhVxQ7KgHFMW0RyaflJSxcspR/ eMZBLKvCvZrsyZzYf/AH8merQtDWXlO0a7mgc5MbZflZFtWyCOXmBI14o67y6EyA S60JTbEsLfO7NLvpK2P1DvY2CT9I3UGQPupTBR3vDh5lj3E4Cek9UC+KZ+v4I9CQ DfDshJFLrmPetrEvx2auDtKuhdI86a7/BwCV3yYqQsqcb/ZsOh0= =c8Wy -----END PGP SIGNATURE----- --aT9PWwzfKXlsBJM1--