[PATCH] ARM: kirkwood: of_serial: fix clock gating by removing clock-frequency

Simon Baatz gmbnomis at gmail.com
Wed Jan 30 15:50:36 EST 2013

Hi Jason,

On Tue, Jan 29, 2013 at 09:09:34PM +0000, Jason Cooper wrote:
> When DT support for kirkwood was first introduced, there was no clock
> infrastructure.  As a result, we had to manually pass the
> clock-frequency to the driver from the device node.
> Unfortunately, on kirkwood, with minimal config or all module configs,
> clock-frequency breaks booting because of_serial doesn't consume the
> gate_clk when clock-frequency is defined.
> The end result on kirkwood is that runit gets gated, and then the boot
> fails when the kernel tries to write to the serial port.
> Fix the issue by removing the clock-frequency parameter from all
> kirkwood dts files.
> Booted on dreamplug without earlyprintk and successfully logged in via
> ttyS0.
> Reported-by: Simon Baatz <gmbnomis at gmail.com>
> Signed-off-by: Jason Cooper <jason at lakedaemon.net>
> ---

If you like, you can add my
Tested-by: Simon Baatz <gmbnomis at gmail.com>
(On IB-NAS6210 serial console, earlyprintk and successful login via

- Simon

More information about the linux-arm-kernel mailing list