clk: at91: usb: propagate rate modification to the parent clk

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The at91sam9n12 and at91sam9x5 usb clocks do not propagate rate
modification requests to their parents.
This causes a bug when the PLLB is left uninitialized by the bootloader
(PLL multiplier set to 0, or in other words, PLL rate = 0 Hz).

Implement the determinate_rate method and propagate the change rate
request to the parent clk.

Cc: <stable@vger.kernel.org> # v3.14+
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Bo Shen <voice.shen@atmel.com>
Tested-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

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Boris Brezillon 2015-03-29 03:45:33 +02:00 • committed by Michael Turquette

parent 3a9e9cb65b

commit 4591243102

1 changed files with 49 additions and 15 deletions

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drivers/clk/at91/clk-usb.c

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