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clk: shmobile: mstp: Consider "zb_clk" suitable for power management
Currently the CPG/MSTP Clock Domain code looks for MSTP clocks to power manage a device. Unfortunately, on R-Mobile APE6 (r8a73a4) and SH-Mobile AG5 (sh73a0), the Bus State Controller (BSC) is not power-managed by an MSTP clock, but by a plain CPG clock (zb_clk). Add a special case to handle this, so the clock is properly managed, and devices connected to the BSC work as expected. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
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