Re: Locking in the clk API
From: Russell King - ARM Linux <hidden>
Date: 2011-01-21 09:41:12
Also in:
linux-arm-kernel, lkml
On Thu, Jan 20, 2011 at 11:16:04PM -0800, Saravana Kannan wrote:
This suggestion looked promising till I realized that clk_set_rate() will still be atomic. clk_set_rate() will need to enable/disable the PLLs depending on which PLLs the rates are derived from. So, the locking in clk_prepare/unprepare() still has to be atomic since the "slow stuff" is shared with clk_set_rate().
Who calls clk_set_rate() from an atomic context? Do we know whether anyone does?