Messages in this thread | | | Date | Thu, 23 Apr 2020 11:40:00 +0100 | From | Mark Brown <> | Subject | Re: [PATCH] regmap: mmio: prepare/unprepare clk only when read/write |
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On Thu, Apr 23, 2020 at 01:46:31PM +0800, peng.fan@nxp.com wrote: > From: Peng Fan <peng.fan@nxp.com> > > use clk_prepare at the very beginning will invoke pm runtime resume, > if the clk is binded with a power domain. This will cause runtime > power high. Let's use clk_prepare_enable and clk_disable_unprepare > when read/write to avoid the runtime power issue.
This will mean that we're doing clk_prepare() during I/O which isn't good since for MMIO regmaps we support I/O operations in atomic contexts. [unhandled content-type:application/pgp-signature] | |