linux-kernel - Re: [PATCHv2] clocksource: dw_apb_timer_of: add error handling if no clock available

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Date:   Sat, 5 Dec 2020 09:50:29 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Dinh Nguyen <dinguyen@...nel.org>
Cc:     linux-kernel@...r.kernel.org, tglx@...utronix.de,
        Jisheng.Zhang@...aptics.com, arnd@...db.de
Subject: Re: [PATCHv2] clocksource: dw_apb_timer_of: add error handling if no
 clock available

On 04/12/2020 23:39, Dinh Nguyen wrote:
> 
> 
> On 12/4/20 2:00 PM, Daniel Lezcano wrote:
>> On 04/12/2020 16:36, Dinh Nguyen wrote:
>>> commit ("b0fc70ce1f02 arm64: berlin: Select DW_APB_TIMER_OF") added the
>>> support for the dw_apb_timer into the arm64 defconfig. However, for some
>>> platforms like the Intel Stratix10 and Agilex, the clock manager doesn't
>>> get loaded until after the timer driver get loaded. Thus, the driver
>>> hits
>>> the panic "No clock nor clock-frequency property for" because it cannot
>>> properly get the clock.
>>>
>>> This patch adds the error handling needed for the timer driver so that
>>> the kernel can continue booting instead of just hitting the panic.
>>>
>>> Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
>>
>> Did you have time to test the different combinations ?
> 
> I did test both versions and did not see any difference between the two.
> On both versions, the kernel was able to continue to boot after trying
> to probe the timer driver.

Great, thanks!


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