From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCHv2] i2c: rcar: add DMA support Date: Sun, 15 May 2016 08:52:04 +0200 Message-ID: <20160515065204.GA1846@katana> References: <1463228228-32560-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="VS++wcV0S1rZb1Fb" Return-path: Content-Disposition: inline In-Reply-To: <1463228228-32560-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> Sender: linux-i2c-owner@vger.kernel.org To: Niklas =?utf-8?Q?S=C3=B6derlund?= Cc: linux-i2c@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org --VS++wcV0S1rZb1Fb Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 14, 2016 at 02:17:08PM +0200, Niklas S=C3=B6derlund wrote: > Make it possible to transfer i2c message buffers via DMA. > Start/Stop/Sending_Slave_Address and some data is still handled using > the old state machine, it is sending the bulk of the data that is done > via DMA. >=20 > The first byte of a transmission and the last two bytes of reception are > sent/received using PIO. This is needed for the HW to have access to the > first byte before DMA transmit and to be able to set the STOP condition > for DMA reception. >=20 > Signed-off-by: Niklas S=C3=B6derlund > Tested-by: Wolfram Sang Fixed a checkpatch warning (trailing */) and applied to for-next, thanks! --VS++wcV0S1rZb1Fb Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJXOByUAAoJEBQN5MwUoCm23tUP/35G0Tmb9gBCeO/iHIxLZLn2 xJdbCB3ExP1uVW59HRph5BW4HEA+sHdntdTXexREa0/r4pLE3PzOS/TCOx81ajBv 0GnZKXuap/r/zOnFEaRv02KaBNby+pQlCamQeY+i7oBCiYVH2AcPwv/BwQ8V39uy Hz3UF+KIJcfVBS96F5Ci/ITu+dMzIjhxoYo2JEreFBjJLh14Kj84ZWzn+wUfqzPc hoCrj89NWortSeKruOCuPL67uJzbWmVe/RqooNGJsUpzmRB29RRKFpkxf/PrUapa XZHDpFpbkU3GoLj8JpqJC1esh08H4orUCnq5xY0Z+SuLYZuPLRrwDcmQtlBurIgF zCBWXrEMzDjbWwmCbXV5CFxh64uKewseqYpyKlzY1QzoFvU4kusSKINefOBfAFJp UbNCzm4r4Agv/AWZ4IlC1mb+WB+689/yEJIExFKYbwKkJXyBycKn6KL4UXZR02Wp CEzu2s4r8eo8brTTEj4uD346mU45K6F5HQnB2Jzr8jFJ+TXefx9S1+NpIGEfs/l5 TgdhIMYmMi2oO5ldNf6NGDNdpcjRYefXhAHNyr6WJUauWeFc0Uhj+6/PIdignKsR 2vY/nbQReRLFLVnOvgZGvb7e9GFEPIFY0QUGn167WY2XP2oW8osuAxJR2loTzIsi Tt1X05d8w+nkR2FSm+LH =SdPA -----END PGP SIGNATURE----- --VS++wcV0S1rZb1Fb--