From 3d42a379b6fa5b46058e3302b1802b29f64865bb Mon Sep 17 00:00:00 2001 From: Steffen Trumtrar Date: Tue, 17 Jul 2012 16:14:34 +0200 Subject: [PATCH] can: flexcan: add 2nd clock to support imx53 and newer 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 Signed-off-by: Steffen Trumtrar Acked-by: Hui Wang Signed-off-by: Marc Kleine-Budde --- Reading git-format-patch failed