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clk: Add support for setting clk_rate via debugfs
For testing, it is useful to be able to specify a clock rate manually. As this is a dangerous feature, it is not enabled by default. Users need to modify the source directly and #define CLOCK_ALLOW_WRITE_DEBUGFS. This follows the spirit of commit 09c6ecd ("regmap: Add support for writing to regmap registers via debugfs"). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lkml.kernel.org/r/20190828132306.19012-1-geert+renesas@glider.be Suggested-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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