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authorShawn Guo <shawn.guo@linaro.org>2014-02-11 05:52:09 +0400
committerShawn Guo <shawn.guo@linaro.org>2014-03-05 06:40:46 +0400
commit8d9ee21e98205eebc7fc6caf08a764c9e12c7d68 (patch)
tree36a738878f16ced02eabf99440a2effab9063f8f /Documentation/ldm.txt
parent7899d7d5789653511f19f02ff6819f8c330018fc (diff)
downloadlinux-8d9ee21e98205eebc7fc6caf08a764c9e12c7d68.tar.xz
bus: imx-weim: support CS GPR configuration
For imx50-weim and imx6q-weim type of devices, there might a WEIM CS space configuration register in General Purpose Register controller, e.g. IOMUXC_GPR1 on i.MX6Q. Depending on which configuration of the following 4 is chosen for given system, IOMUXC_GPR1[11:0] should be set up as 05, 033, 0113 or 01111 correspondingly. CS0(128M) CS1(0M) CS2(0M) CS3(0M) CS0(64M) CS1(64M) CS2(0M) CS3(0M) CS0(64M) CS1(32M) CS2(32M) CS3(0M) CS0(32M) CS1(32M) CS2(32M) CS3(32M) The patch creates a function for such type of devices, which scans 'ranges' property of WEIM node and build the GPR value incrementally. Thus the WEIM CS GPR can be set up automatically at boot time. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Philippe De Muyter <phdm@macqel.be> Tested-by: Philippe De Muyter <phdm@macqel.be>
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