clk-divider: make sure read-only dividers do not write to their register
From: Heiko Stuebner <heiko@...> Date: Tue, 19 Jan 2016 09:21:59 +0100
Commit-Message
Commit e6d5e7d90be9 ("clk-divider: Fix READ_ONLY when divider > 1") removed the special ops struct for read-only clocks and instead opted to handle them regularly. On the rk3368 this results in breakage as aclkm now gets set a value. While it is the same divider, the A53 core still doesn't like it. The reason being that "ACLKENMasserts one clock cycle before the rising edge of ACLKM" and the clock should only be touched when STANDBYWFIL2 is asserted. So make sure, read-only clocks don't touch the clock-register at all even if only writing the same value. Fixes: e6d5e7d90be9 ("clk-divider: Fix READ_ONLY when divider > 1") Reported-by: Zhang Qing <zhangqing@...> Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/clk/clk-divider.c | 4 ++++ 1 file changed, 4 insertions(+)
Statistics
- 4 lines added
- 0 lines removed