clk: renesas: r8a7795: add R clk

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R can select between two parents. We deal with it like this: During
initialization, check if EXTALR is populated. If so, use it for R. If
not, use R_Internal. clk_mux doesn't help here because we don't want to
switch parents depending on the clock rate. The clock rate (and source)
should stay constant for the watchdog, so I think a setup like this
during initialization makes sense.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

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Wolfram Sang 2016-03-30 16:58:20 +02:00 • committed by Geert Uytterhoeven

parent 5524a67f3a

commit 1e6237e32e

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drivers/clk/renesas/r8a7795-cpg-mssr.c

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