Path: csiph.com!news.redatomik.org!aioe.org!bofh.it!news.nic.it!robomod From: Eric Anholt Newsgroups: linux.kernel Subject: Re: [PATCH 2/4] dt-bindings: Document the Raspberry Pi Touchscreen nodes. Date: Tue, 16 May 2017 02:10:01 +0200 Message-ID: References: X-Original-To: Laurent Pinchart , dri-devel@lists.freedesktop.org User-Agent: Notmuch/0.22.2+1~gb0bcfaa (http://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 88 Organization: linux.* mail to news gateway X-Original-Cc: Thierry Reding , Rob Herring , Mark Rutland , Archit Taneja , Andrzej Hajda , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Original-Date: Mon, 15 May 2017 17:03:29 -0700 X-Original-Message-ID: <87shk53bxq.fsf@eliezer.anholt.net> X-Original-References: <20170511235625.22427-1-eric@anholt.net> <20170511235625.22427-3-eric@anholt.net> <1579603.xgvSgGFBs8@avalon> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: csiph.com linux.kernel:1642138 --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Laurent Pinchart writes: > Hi Eric, > > Thank you for the patch. > > On Thursday 11 May 2017 16:56:23 Eric Anholt wrote: >> The Raspberry Pi 7" Touchscreen is a DPI touchscreen panel with >> DSI->DPI bridge and touchscreen controller integrated, that connects >> to the Raspberry Pi through its 15-pin "DSI" connector (some lines are >> DSI, some lines are I2C). >>=20 >> This device is represented in the DT as three nodes (DSI device, I2C >> device, panel). Input will be left to a separate binding later, as it >> will be a basic I2C client device. >>=20 >> Signed-off-by: Eric Anholt >> --- >> .../raspberrypi,7inch-touchscreen-bridge.txt | 68 +++++++++++++++= ++++ >> .../panel/raspberrypi,7inch-touchscreen-panel.txt | 7 +++ >> 2 files changed, 75 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-touch= scr >> een-bridge.txt create mode 100644 >> Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchs= cre >> en-panel.txt >>=20 >> diff --git >> a/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-tou= chs >> creen-bridge.txt >> b/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-tou= chs >> creen-bridge.txt new file mode 100644 >> index 000000000000..a5669beaf68f >> --- /dev/null >> +++ >> b/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-tou= chs >> creen-bridge.txt @@ -0,0 +1,68 @@ >> +Official 7" (800x480) Raspberry Pi touchscreen panel's bridge. >> + >> +This DSI panel contains: >> + >> +- TC358762 DSI->DPI bridge >> +- Atmel microcontroller on I2C for power sequencing the DSI bridge and >> + controlling backlight >> +- Touchscreen controller on I2C for touch input >> + >> +and this covers the TC358762 bridge and Atmel microcontroller, while >> +../panel/raspberrypi,7inch-touchscreen-panel.txt covers the panel. > > The TC358762 is a standalone bridge that doesn't depend on the ATTiny=20 > microcontroller used by the RPI. As it's usable standalone, I believe thi= s=20 > binding should be split in two. Do you have a plan for how I would implement a driver on top of that binding change, though? Note that we don't program the Toshiba directly, we only send commands to the Atmel. --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE/JuuFDWp9/ZkuCBXtdYpNtH8nugFAlkaQdEACgkQtdYpNtH8 nuim9Q//VfKLHqKR7iiOs8nHXgwe2IGXEy6IHlOXNQp9nxrMLiSlPJbJtTAGsgyX VEip5dpNy/scmfGMGS2r+BceDYDqnEfRmq9HuO33vfQBDBipV2ll85Ro1xmr8dv5 vOAwIOgmsiGiEtuWbLGjdVUazIb70W3VqwsasNUTaG0r+H6dPGhtXA1DaM0+qKVX AiOrUZP1RHmX/vDUluLEL0PUcrKwBsOExmaB9y88kzqX8E+OgeYpywZsgRJvcOSu Z9/anUY1Dj8sh8Sj3ewgTla9U5cooFnnJA2kX8pAM0YF3FmHqXN2sZir6WtwHaJ4 t98MwzR19dxoRvN1/WP9SOxMFvHpXh9TbTzt2o8FSUoqwvdp/8dyI6x3mwn7Aafn inKesc7PhmVuKJT2gmCSGN339mN71znOJYM1G28OgV0RxwoyHOZGlCDrAJQkkr0a ycwh3lRg11k3wZNI92wLVd2M8WNUGbbEcx5rfqkHwqJZis4EPUQ6dSqj2tdc7igL W/zH6wCC36nkQnVdqToG4ci0hpPZyPjktiNndVlZLAAoIuyDXNcGnsDoKKTBn/bg 3r8aH+/3oiGaQuKv6lcnNQePyTyM89UkfD+hb1nTuASWANRlCgXpI+ZyMvuVWPT5 XhRxs6shdQja4pfd+hleAgfR0/BmXuk5diR4WH7IxE66H66s3nk= =6YVT -----END PGP SIGNATURE----- --=-=-=--