linux-kernel - Re: [PATCH 1/2] hwmon: Add Synaptics AS370 PVT sensor driver

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Date:   Mon, 26 Aug 2019 20:51:42 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc:     Jean Delvare <jdelvare@...e.com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] hwmon: Add Synaptics AS370 PVT sensor driver

On 8/26/19 8:02 PM, Jisheng Zhang wrote:
> Hi Guenter,
> 
> On Mon, 26 Aug 2019 06:44:34 -0700 Guenter Roeck wrote:
> 
>>
>>
>> On 8/26/19 3:01 AM, Jisheng Zhang wrote:
>>> Add a new driver for Synaptics AS370 PVT sensors. Currently, only
>>> temperature is supported.
>>>
>>> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
>>> ---
>>>    drivers/hwmon/Kconfig       |  10 +++
>>>    drivers/hwmon/Makefile      |   1 +
>>>    drivers/hwmon/as370-hwmon.c | 158 ++++++++++++++++++++++++++++++++++++
>>>    3 files changed, 169 insertions(+)
>>>    create mode 100644 drivers/hwmon/as370-hwmon.c
>>>
>>> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
>>> index 650dd71f9724..d31610933faa 100644
>>> --- a/drivers/hwmon/Kconfig
>>> +++ b/drivers/hwmon/Kconfig
>>> @@ -246,6 +246,16 @@ config SENSORS_ADT7475
>>>          This driver can also be built as a module. If so, the module
>>>          will be called adt7475.
>>>
>>> +config SENSORS_AS370
>>> +     tristate "Synaptics AS370 SoC hardware monitoring driver"
>>
>> I think this needs "depends on HAS_IOMEM".
> 
> HWMON depends on HAS_IOMEM, so the dependency has been required
> by the common HWMON, we don't need it here.
> 

This is so wrong :-(. As if I2C or SPI based sensor chips would
require iomem. Oh well, no one complained in 12+ years, so I guess
we are "fine", at least for the time being.

Thanks for noticing.

Guenter