Re: [PATCH v2 2/2] clk: samsung: exynos5800: Move MAU subsystem clocks to MAU sub-CMU

[Stephen Boyd]

Quoting Sylwester Nawrocki (2019-08-08 07:49:29)
> This patch fixes broken sound on Exynos5422/5800 platforms after
> system/suspend resume cycle in cases where the audio root clock
> is derived from MAU_EPLL_CLK.
> 
> In order to preserve state of the USER_MUX_MAU_EPLL_CLK clock mux
> during system suspend/resume cycle for Exynos5800 we group the MAU
> block input clocks in "MAU" sub-CMU and add the clock mux control
> bit to .suspend_regs.  This ensures that user configuration of the mux
> is not lost after the PMU block changes the mux setting to OSC_DIV
> when switching off the MAU power domain.
> 
> Adding the SRC_TOP9 register to exynos5800_clk_regs[] array is not
> sufficient as at the time of the syscore_ops suspend call MAU power
> domain is already turned off and we already save and subsequently
> restore an incorrect register's value.
> 
> Fixes: b06a532bf1fa ("clk: samsung: Add Exynos5 sub-CMU clock driver")
> Reported-by: Jaafar Ali <jaafarkhalaf@xxxxxxxxx>
> Suggested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> Tested-by: Jaafar Ali <jaafarkhalaf@xxxxxxxxx>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> ---

Applied to clk-fixes