linux-kernel - Re: [PATCH V2 5/6] rtc: max77xxx: add RTC driver for Maxim MAX77xxx series RTC IP

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Date:	Wed, 13 Jan 2016 09:06:08 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Laxman Dewangan <ldewangan@...dia.com>, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linus.walleij@...aro.org, gnurou@...il.com, lee.jones@...aro.org,
	broonie@...nel.org, a.zummo@...ertech.it,
	alexandre.belloni@...e-electrons.com
Cc:	lgirdwood@...il.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	rtc-linux@...glegroups.com, swarren@...dia.com, treding@...dia.com
Subject: Re: [PATCH V2 5/6] rtc: max77xxx: add RTC driver for Maxim MAX77xxx
 series RTC IP

On 12.01.2016 18:17, Laxman Dewangan wrote:
> Maxim Semiconductor's PMIC MAX77620, MAX77686, MAX20024 have
> same RTC IP on these PMICs.
> 
> Add generic MAX77xxxx series RTC driver which can be used as
> RTC driver for these PMIC and avoids duplication of RTC driver
> for each PMICs. Their MFD driver can be different here.
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> ---
> Changes from V1: 
> - Rename the file to rtc-max77xxx.c and make the generic implementation.
> - Direct regmap apis are used for the register access.
> - Decouped from max77620 driver.
> - Taken care of cleanup comments form V1 version.
> 
>  drivers/rtc/Kconfig        |  10 +
>  drivers/rtc/Makefile       |   1 +
>  drivers/rtc/rtc-max77xxx.c | 500 +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 511 insertions(+)
>  create mode 100644 drivers/rtc/rtc-max77xxx.c
> 
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index 376322f..4972dd5 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -315,6 +315,16 @@ config RTC_DRV_MAX8997
>  	  This driver can also be built as a module. If so, the module
>  	  will be called rtc-max8997.
>  
> +config RTC_DRV_MAX77XXX
> +	tristate "Maxim MAX77XXX series generic RTC driver"
> +	help
> +	  If you say yes here you will get support for the generic RTC driver
> +	  for Maxim Semiconductor MAX77XXX series of PMIC like MAX77620.
> +	  This also supports the RTC driver for Maxim PMIC MaX20024 which
> +	  is almost same as MAX77620.
> +	  This driver can also be built as a module. If so, the module
> +	  will be called rtc-max77xxx.
> +

That was not the consensus... You still added a new driver - but now
with different name.

That is useless duplication

Please work with existing code. Use existing maxim RTC drivers: either
max77686 or max77802.

There is no need for new one.

Best regards,
Krzysztof