Joachim Eastwood c23a584769 clk: lpc18xx-cgu: fix potential system hang when disabling unused clocks ... The clock consumer (CCU) of the CGU must be able to check if a CGU base clock is really running since access to the CCU registers requires a running base clock. Access with a disabled base clock will cause the system to hang. Fix this issue by adding code that check if the parent clock is running in the is_enabled clk_ops callback. Since certain clocks can be cascaded this must be added to all clock gates. The hang would occur if the boot ROM or boot loader didn't setup and enable the USB0 clock. Then when the clk framework tried to access the CCU register it would hang the system. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>		2015-10-26 12:36:58 -07:00
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clk-lpc18xx-ccu.c	clk: lpc18xx-ccu: fix potential system hang when disabling unused clocks	2015-10-26 12:36:56 -07:00
clk-lpc18xx-cgu.c	clk: lpc18xx-cgu: fix potential system hang when disabling unused clocks	2015-10-26 12:36:58 -07:00
Makefile	clk: add lpc18xx ccu clk driver	2015-06-18 15:44:48 -07:00