On Sat, Nov 07, 2020 at 01:14:56PM +0100, Paweł Chmiel wrote: > This clock must be always enabled to allow access to any registers in > fsys1 CMU. Until proper solution based on runtime PM is applied > (similar to what was done for Exynos5433), fix this by calling > clk_prepare_enable() directly from clock provider driver. > > It was observed on Samsung Galaxy S6 device (based on Exynos7420), where > UFS module is probed before pmic used to power that device. > In this case defer probe was happening and that clock was disabled by > UFS driver, causing whole boot to hang on next CMU access. > > Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@xxxxxxxxx> > --- > Changes from v1: > - Instead of marking clock as critical, enable it manually in driver. > --- > drivers/clk/samsung/clk-exynos7.c | 5 +++++ > 1 file changed, 5 insertions(+) Acked-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> Best regards, Krzysztof
