clk: tegra: Add library for the DFLL clock source (open-loop mode)

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Add shared code to support the Tegra DFLL clocksource in open-loop
mode. This root clocksource is present on the Tegra124 SoCs. The
DFLL is the intended primary clock source for the fast CPU cluster.

This code is very closely based on a patch by Paul Walmsley from
December (http://comments.gmane.org/gmane.linux.ports.tegra/15273),
which in turn comes from the internal driver by originally created
by Aleksandr Frid <afrid@nvidia.com>.

Subsequent patches will add support for closed loop mode and drivers
for the Tegra124 fast CPU cluster DFLL devices, which rely on this
code.

Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

...

This commit is contained in:

Tuomas Tynkkynen 2015-05-13 17:58:36 +03:00 • committed by Thierry Reding

parent 0c59d26770

commit d8d7a08fa8

3 changed files with 1150 additions and 0 deletions

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1

drivers/clk/tegra/Makefile

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1095

drivers/clk/tegra/clk-dfll.c

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54

drivers/clk/tegra/clk-dfll.h

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