On Mon, Jun 17, 2019 at 02:35:42AM +0300, Dmitry Osipenko wrote: > A proper External Memory Controller clock rounding and parent selection > functionality is required by the EMC drivers. It is not available using > the generic clock implementation, hence add a custom one. The clock rate > rounding shall be done by the EMC drivers because they have information > about available memory timings, so the drivers will have to register a > callback that will round the requested rate. EMC clock users won't be able > to request EMC clock by getting -EPROBE_DEFER until EMC driver is probed > and the callback is set up. The functionality is somewhat similar to the > clk-emc.c which serves Tegra124+ SoC's, the later HW generations support > more parent clock sources and the HW configuration and integration with > the EMC drivers differs a tad from the older gens, hence it's not really > worth to try to squash everything into a single source file. > > Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > --- > drivers/clk/tegra/Makefile | 2 + > drivers/clk/tegra/clk-tegra20-emc.c | 305 ++++++++++++++++++++++++++++ > drivers/clk/tegra/clk-tegra20.c | 55 ++--- > drivers/clk/tegra/clk-tegra30.c | 38 +++- > drivers/clk/tegra/clk.h | 6 + > include/linux/clk/tegra.h | 14 ++ > 6 files changed, 368 insertions(+), 52 deletions(-) > create mode 100644 drivers/clk/tegra/clk-tegra20-emc.c Hi Mike, Stephen, The remaining patches of this series have a build-time dependency on this clock driver patch. Would you mind if I pick this up into the Tegra tree, so that I can resolve the dependency there? I can send a pull request of the stable branch with this one patch if we need to resolve a conflict between the clk and Tegra trees. Thierry
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