linux-kernel - Re: [PATCH v10 4/4] rtc: ds1307: add frequency_test_enable sysfs attribute to check tick on m41txx

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Date:   Wed, 18 Jul 2018 19:40:07 +0200
From:   Giulio Benetti <giulio.benetti@...ronovasrl.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        "open list:REAL TIME CLOCK (RTC) SUBSYSTEM" 
        <linux-rtc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 4/4] rtc: ds1307: add frequency_test_enable sysfs
 attribute to check tick on m41txx

Il 18/07/2018 18:26, Andy Shevchenko ha scritto:
> On Wed, Jul 18, 2018 at 5:09 PM, Giulio Benetti
> <giulio.benetti@...ronovasrl.com> wrote:
>> On m41txx you can enable open-drain OUT pin to check if offset is ok.
>> Enabling OUT pin with frequency_test_enable attribute, OUT pin will tick
>> 512 times faster than 1s tick base.
>>
>> Enable or Disable FT bit on CONTROL register if freq_test is 1 or 0.
> 
> Taking into consideration the amount of patches per hour you need to
> slow down a bit.
> 

You're right, I'm really sorry about it.

Giulio