linux-kernel - Re: [PATCH v5 2/2] rtc: max31335: add driver support

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Date:   Fri, 3 Nov 2023 12:48:27 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Antoniu Miclaus <antoniu.miclaus@...log.com>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>, linux-rtc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v5 2/2] rtc: max31335: add driver support

On Fri, Nov 03, 2023 at 04:00:26PM +0200, Antoniu Miclaus wrote:
> RTC driver for MAX31335 ±2ppm Automotive Real-Time Clock with
> Integrated MEMS Resonator.
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
> ---
>  MAINTAINERS                |   8 +
>  drivers/rtc/Kconfig        |  20 ++
>  drivers/rtc/Makefile       |   1 +
>  drivers/rtc/rtc-max31335.c | 700 +++++++++++++++++++++++++++++++++++++
>  4 files changed, 729 insertions(+)
>  create mode 100644 drivers/rtc/rtc-max31335.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index dd5de540ec0b..bc484cb997ab 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -12823,6 +12823,14 @@ F:	Documentation/devicetree/bindings/hwmon/adi,max31827.yaml
>  F:	Documentation/hwmon/max31827.rst
>  F:	drivers/hwmon/max31827.c
>  
> +MAX31335 RTC DRIVER
> +M:	Antoniu Miclaus <antoniu.miclaus@...log.com>
> +L:	linux-rtc@...r.kernel.org
> +S:	Supported
> +W:	https://ez.analog.com/linux-software-drivers
> +F:	Documentation/devicetree/bindings/rtc/adi,max31335.yaml
> +F:	drivers/rtc/rtc-max31335.c
> +
>  MAX6650 HARDWARE MONITOR AND FAN CONTROLLER DRIVER
>  L:	linux-hwmon@...r.kernel.org
>  S:	Orphan
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index d7502433c78a..360da13fe61b 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -373,6 +373,26 @@ 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_MAX31335
> +	tristate "Analog Devices MAX31335"
> +	depends on I2C
> +	select REGMAP_I2C
> +	help
> +	  If you say yes here you get support for the Analog Devices
> +	  MAX31335.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called rtc-max31335.
> +
> +config RTC_DRV_MAX31335_HWMON
> +	bool "HWMON support for Analog Devices MAX31335"
> +	depends on RTC_DRV_MAX31335 && HWMON
> +	depends on !(RTC_DRV_MAX31335=y && HWMON=m)
> +	default y
> +	help
> +	  Say Y here if you want to expose temperature sensor data on
> +	  rtc-max31335.

CONFIG_RTC_DRV_MAX31335_HWMON is not used in the driver. What is the point
of having it ?

Guenter