From mboxrd@z Thu Jan 1 00:00:00 1970 From: mkl@pengutronix.de (Marc Kleine-Budde) Date: Wed, 18 Jul 2012 12:16:02 +0200 Subject: [PATCH v2] can: flexcan: add 2nd clock to support imx53 and newer In-Reply-To: <50068A54.80705@gmail.com> References: <1342601282-1208-1-git-send-email-mkl@pengutronix.de> <50068A54.80705@gmail.com> Message-ID: <50068CE2.9090408@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 07/18/2012 12:05 PM, Hui Wang wrote: > Marc Kleine-Budde wrote: >> From: Steffen Trumtrar >> >> This patch adds support for a second clock to the flexcan driver. On >> modern freescale ARM cores like the imx53 and imx6q two clocks ("ipg" >> and "per") must be enabled in order to access the CAN core. >> >> In the original driver, the clock was requested without specifying the >> connection id, further all mainline ARM archs with flexcan support >> (imx28, imx25, imx35) register their flexcan clock without a >> connection id, too. >> >> This patch first renames the existing clk variable to clk_ipg and >> converts it to devm for easier error handling. The connection id "ipg" >> is added to the devm_clk_get() call. Then a second clock "per" is >> requested. As all archs don't specify a connection id, both clk_get >> return the same clock. This ensures compatibility to existing flexcan >> support and adds support for imx53 at the same time. >> >> After this patch hits mainline, the archs may give their existing >> flexcan clock the "ipg" connection id and implement a dummy "per" >> clock. >> >> This patch has been tested on imx28 (unmodified clk tree) and on imx53 >> with a seperate "ipg" and "per" clock. >> >> Cc: Sascha Hauer >> Cc: Shawn Guo >> Cc: Hui Wang >> > Acked-by: Hui Wang tnx, Marc -- 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 | -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 262 bytes Desc: OpenPGP digital signature URL: