linux-kernel - Re: [PATCH v5 4/4] drivers/rtc/rtc-s5m.c: add support for S2MPS15 RTC

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Message-id: <5633382F.4000300@samsung.com>
Date:	Fri, 30 Oct 2015 14:58:15 +0530
From:	Alim Akhtar <alim.akhtar@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	lee.jones@...aro.org, broonie@...nel.org
Cc:	linux-samsung-soc@...r.kernel.org, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: Re: [PATCH v5 4/4] drivers/rtc/rtc-s5m.c: add support for S2MPS15 RTC

Hi Krzysztof,

On 10/30/2015 02:08 PM, Krzysztof Kozlowski wrote:
> On 30.10.2015 15:25, Alim Akhtar wrote:
>> RTC found in s2mps15 is almost same as one found on s2mps13
>> with few differences in RTC_UPDATE register fields, like:
>> 1> Bit[4] and Bit[1] are reversed
>>     - On s2mps13
>>            WUDR -> bit[4], AUDR -> bit[1]
>>     - On s2mps15
>> 	  WUDR -> bit[1], AUDR -> bit[4]
>> 2> In case of s2mps13, for alarm register, need to set both
>>     WDUR and ADUR high, whereas for s2mps15 only set AUDR to high.
>> 3> On s2mps15, WUDR, RUDR and AUDR functions should never be used
>>     at the same time.
>>
>> This patch add required changes to enable s2mps15 rtc timer.
>>
>> Cc: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
>> ---
>>   drivers/rtc/rtc-s5m.c           |   37 +++++++++++++++++++++++++++++++++----
>>   include/linux/mfd/samsung/rtc.h |    2 ++
>>   2 files changed, 35 insertions(+), 4 deletions(-)
>>
>
> The usage of rtc_udr_mask is now a little bit messy and not-consistent
> but this can be fixed in separate patch.
>
> Current approach is the simplest way to add S2MPS15 and looks correct:
>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
>
Thanks!

> Best regards,
> Krzysztof
>
>
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