linux-kernel - Re: [PATCH v11 4/4] rtc: ds1307: add frequency_test_enable sysfs attribute to check tick on m41txx

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Message-ID: <20180919170618.GC2479@piout.net>
Date:   Wed, 19 Sep 2018 19:06:18 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Giulio Benetti <giulio.benetti@...ronovasrl.com>
Cc:     a.zummo@...ertech.it, andy.shevchenko@...il.com, robh@...nel.org,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 4/4] rtc: ds1307: add frequency_test_enable sysfs
 attribute to check tick on m41txx

On 25/07/2018 19:26:05+0200, Giulio Benetti 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.
> 
> Signed-off-by: Giulio Benetti <giulio.benetti@...ronovasrl.com>
> ---
> V10 => V11:
> * kstrtobool(): check error if (ret) avoiding checking specific error.
> 
>  drivers/rtc/rtc-ds1307.c | 94 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 94 insertions(+)
> 
Applied, thanks.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com