From: Stefan Wahren Date: Fri, 30 Jan 2015 19:20:10 +0000 (+0000) Subject: clk: mxs: Fix invalid 32-bit access to frac registers X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~17^2~10 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=039e5970750775f102b255de9bf914e04955c6da;p=pandora-kernel.git clk: mxs: Fix invalid 32-bit access to frac registers According to i.MX23 and i.MX28 reference manual [1],[2] the fractional clock control register is 32-bit wide, but is separated in 4 parts. So write instructions must not apply to more than 1 part at once. The clk init for the i.MX28 violates this restriction and all the other accesses on that register suggest that there isn't such a restriction. This patch restricts the access to this register to byte instructions and extends the comment in the init functions. Btw the imx23 init now uses a R-M-W sequence just like imx28 init to avoid any clock glitches. The changes has been tested with a i.MX23 and a i.MX28 board. [1] - http://cache.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf [2] - http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdf Signed-off-by: Stefan Wahren Reviewed-by: Marek Vasut Reviewed-by: Fabio Estevam Signed-off-by: Michael Turquette --- Reading git-diff-tree failed