Re: [PATCH] brcmfmac: add support for external 32khz clock

On 11/6/2017 12:27 PM, Simon Shields wrote:

On Mon, Nov 06, 2017 at 11:59:37AM +0100, Arend van Spriel wrote:

quoted

On 11/4/2017 2:24 PM, Simon Shields wrote:

quoted

Some boards use an external 32khz clock for low-power
mode timing. Make sure the clock is powered on while the chipset
is active.

Do you have such a board? With the little documentation I can get my hands
on here I wonder whether the clock needs to be enabled before the device is
powered. If you have the hardware I would like to check some registers in
the device.

Yes. Trats2 (exynos4412-based) has such a setup. The BCM4334 works fine
with this patch and one more that enables the WL_REG_EN pin when
brcmfmac is probed.

Ok. So this is exactly the thing I was wondering about. So it makes me 
curious how the WL_REG_EN patch looks like. Can you provide that?

Without this patch (and only enabling WL_REG_EN), the chip is detected but
attempting to initialise it fails with a bunch of timeouts.

I would be interested in seeing a detailed log of that. Could you 
provide that? You need to build the driver with CONFIG_BRCMDBG and pass 
module parameter 'debug=0x1416' upon insmod/modprobe.

Regards,
Arend

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html