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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-09-22 11:30:50 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-09-27 09:25:02 +0100
commit40d3e0f4942ec12c4521fe1b2a2b774164cd2c80 (patch)
tree2c1fb0c4f3e298a2dcf4d8ddb32b4b1577408833 /drivers
parent6cfa6279edbffa921b7d8c9519bfd83a24ba508e (diff)
downloadlinux-40d3e0f4942ec12c4521fe1b2a2b774164cd2c80.tar.bz2
clk: provide prepare/unprepare functions
As discussed previously, there's the need on some platforms to run some parts of clk_enable() in contexts which can schedule. The solution which was agreed upon was to provide clk_prepare() and clk_unprepare() to contain this parts, while clk_enable() and clk_disable() perform the atomic part. This patch provides a common definition for clk_prepare() and clk_unprepare() in linux/clk.h, and provides an upgrade path for existing implementation and drivers: drivers can start using clk_prepare() and clk_unprepare() once this patch is merged without having to wait for platform support. Platforms can then start to provide these additional functions. Eventually, HAVE_CLK_PREPARE will be removed from the kernel, and everyone will have to provide these new APIs. Acked-by: Saravana Kannan <skannan@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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