clk: at91: add slow clks driver

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AT91 slow clk is a clk multiplexer.

In some SoCs (sam9x5, sama5, sam9g45 families) this multiplexer can
choose among 2 sources: an internal RC oscillator circuit and an oscillator
using an external crystal.

In other Socs (sam9260 family) the multiplexer source is hardcoded with
the OSCSEL signal.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

...

This commit is contained in:

Boris BREZILLON 2014-05-07 18:02:15 +02:00 • committed by Nicolas Ferre

parent f9e1716f91

commit 80eded6ce8

7 changed files with 557 additions and 2 deletions

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4

drivers/clk/at91/Makefile

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467

drivers/clk/at91/clk-slow.c

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5

drivers/clk/at91/pmc.c

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3

drivers/clk/at91/pmc.h

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57

drivers/clk/at91/sckc.c

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22

drivers/clk/at91/sckc.h

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1

include/linux/clk/at91_pmc.h

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