clk: at91: clk-generated: make gclk determine audio_pll rate

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This allows gclk to determine audio_pll rate and set the parent rate
accordingly.

However, there are multiple children clocks that could technically
change the rate of audio_pll (via gck). With the rate locking, the first
consumer to enable the clock will be the one definitely setting the rate
of the clock.

Since audio IPs are most likely to request the same rate, we enforce
that the only clks able to modify gck rate are those of audio IPs.

To remain consistent, we deny other clocks to be children of audio_pll.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

...

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Quentin Schulz 2017-08-10 08:34:05 +02:00 • committed by Stephen Boyd

parent 8a8f4bf0c4

commit 1a1a36d72e

1 changed files with 57 additions and 6 deletions

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drivers/clk/at91/clk-generated.c

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