From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Kleine-Budde Subject: Re: [RFC 5/5] [powerpc] Implement a p1010rdb clock source. Date: Mon, 08 Aug 2011 14:07:32 +0200 Message-ID: <4E3FD184.1070706@pengutronix.de> References: <1312641270-6018-1-git-send-email-holt@sgi.com> <1312641270-6018-6-git-send-email-holt@sgi.com> <4E3FA066.3020301@grandegger.com> <20110808113136.GS4926@sgi.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2030089787590923184==" Cc: socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, U Bhaskar-B22300 , Wolfgang Grandegger To: Robin Holt Return-path: In-Reply-To: <20110808113136.GS4926-sJ/iWh9BUns@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: socketcan-core-bounces-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org Errors-To: socketcan-core-bounces-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org List-Id: netdev.vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============2030089787590923184== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig41B4B46911F85EF5B70EFB51" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig41B4B46911F85EF5B70EFB51 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 08/08/2011 01:31 PM, Robin Holt wrote: > On Mon, Aug 08, 2011 at 10:37:58AM +0200, Wolfgang Grandegger wrote: >> On 08/06/2011 04:34 PM, Robin Holt wrote: >>> flexcan driver needs the clk_get, clk_get_rate, etc functions >>> to work. This patch provides the minimum functionality. >> >> This needs some more general thoughts... apart from the question where= >> the code should go. >> >> Like for the MSCAN on the MPC5200, the user should be *able* to select= >> an appropriate clock source and divider via DTS node properties. >> Currently it seems, that the DTS properties must match some >> pre-configured values, most likely set by the boot loader. Please >> correct me if I'm wrong. For me this is generic and should go into the= >> Flexcan driver. From there, a platform specific function, e.g. >> flexcan_set_clock() might be called. >=20 > OK. Dug a bit more. The p1010 built-in clocksource seems to be the > periphereal clock frequency which is system bus frequency divided > by 2. The clock source can not be changed, but the clock divider can > by freezing the interface and setting the CTRL register. This appears Which bit(s) in the CTRL register is/are this? Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | --------------enig41B4B46911F85EF5B70EFB51 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk4/0YcACgkQjTAFq1RaXHOucQCfbpjrSHLbQWHBnbkUqDDMZ5ko YQsAnie4/LNKAeroLiIoyoIn8EU1fIDa =hS27 -----END PGP SIGNATURE----- --------------enig41B4B46911F85EF5B70EFB51-- --===============2030089787590923184== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Socketcan-core mailing list Socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org https://lists.berlios.de/mailman/listinfo/socketcan-core --===============2030089787590923184==--