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Some clocks must be registered before init calls. For example MCT clock
(from CMU_PERI) is needed for MCT timer driver, which is registered
with TIMER_OF_DECLARE(). By the time we get to core_initcall() used for
clk-exynos850 platform driver init, it's already too late. Inability to
get "mct" clock in MCT driver leads to kernel panic, as functions
registered with *_OF_DECLARE() can't do deferred calls. MCT timer driver
can't be fixed either, as it's acting as a clock source and it's
essential to register it in start_kernel() -> time_init().
Let's register CMU_PERI clocks early, using CLK_OF_DECLARE(). CMU_TOP
generates clocks needed for CMU_PERI, but it's already registered early.
While at it, let's cleanup the code a bit, by extracting everything
related to CMU initialization and registration to the separate function.
Similar issue was discussed at [1] and addressed in commit
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|---|---|---|
| .. | ||
| clk-cpu.c | ||
| clk-cpu.h | ||
| clk-exynos4.c | ||
| clk-exynos5-subcmu.c | ||
| clk-exynos5-subcmu.h | ||
| clk-exynos7.c | ||
| clk-exynos850.c | ||
| clk-exynos3250.c | ||
| clk-exynos4412-isp.c | ||
| clk-exynos5250.c | ||
| clk-exynos5260.c | ||
| clk-exynos5260.h | ||
| clk-exynos5410.c | ||
| clk-exynos5420.c | ||
| clk-exynos5433.c | ||
| clk-exynos-audss.c | ||
| clk-exynos-clkout.c | ||
| clk-pll.c | ||
| clk-pll.h | ||
| clk-s3c64xx.c | ||
| clk-s3c2410-dclk.c | ||
| clk-s3c2410.c | ||
| clk-s3c2412.c | ||
| clk-s3c2443.c | ||
| clk-s5pv210-audss.c | ||
| clk-s5pv210.c | ||
| clk.c | ||
| clk.h | ||
| Kconfig | ||
| Makefile | ||