[PATCH v3 4/6] clk: sunxi-ng: mux: Add clk notifier functions
From: Maxime Ripard <hidden>
Date: 2016-08-25 20:31:32
Also in:
linux-clk, linux-devicetree, lkml
On Thu, Aug 25, 2016 at 02:21:58PM +0800, Chen-Yu Tsai wrote:
On sunxi we support cpufreq by changing the clock rate of PLL-CPU. It's possible the clock output of the PLL goes out of the CPU's operational limits when the PLL's multipliers / dividers are changed and it hasn't stabilized yet. This would result in the CPU hanging. To circumvent this, we temporarily switch the CPU mux clock to another stable clock before the rate change, and switch it back after the PLL stabilizes. This is done with clk notifiers registered on the PLL. This patch adds common functions for notifiers to reparent mux clocks. Signed-off-by: Chen-Yu Tsai <redacted>
Applied, thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20160825/9991d1b5/attachment.sig>