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Date:   Sun, 22 Nov 2020 10:47:40 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     rentao.bupt@...il.com
Cc:     Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
        linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org,
        taoren@...com, mikechoi@...com
Subject: Re: [PATCH v3 2/2] docs: hwmon: Document max127 driver

On Thu, Nov 19, 2020 at 09:53:24AM -0800, rentao.bupt@...il.com wrote:
> From: Tao Ren <rentao.bupt@...il.com>
> 
> Add documentation for the max127 hardware monitoring driver.
> 
> Signed-off-by: Tao Ren <rentao.bupt@...il.com>

For my reference:

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

Guenter

> ---
>  Changes in v3:
>    - no code change. xdp maintainers were removed from to/cc list.
>  Changes in v2:
>    - add more description for min/max sysfs nodes.
>    - convert values from volt to millivolt in the document.
> 
>  Documentation/hwmon/index.rst  |  1 +
>  Documentation/hwmon/max127.rst | 45 ++++++++++++++++++++++++++++++++++
>  2 files changed, 46 insertions(+)
>  create mode 100644 Documentation/hwmon/max127.rst
> 
> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
> index 408760d13813..0a07b6000c20 100644
> --- a/Documentation/hwmon/index.rst
> +++ b/Documentation/hwmon/index.rst
> @@ -111,6 +111,7 @@ Hardware Monitoring Kernel Drivers
>     ltc4245
>     ltc4260
>     ltc4261
> +   max127
>     max16064
>     max16065
>     max1619
> diff --git a/Documentation/hwmon/max127.rst b/Documentation/hwmon/max127.rst
> new file mode 100644
> index 000000000000..dc192dd9c37c
> --- /dev/null
> +++ b/Documentation/hwmon/max127.rst
> @@ -0,0 +1,45 @@
> +.. SPDX-License-Identifier: GPL-2.0-or-later
> +
> +Kernel driver max127
> +====================
> +
> +Author:
> +
> +  * Tao Ren <rentao.bupt@...il.com>
> +
> +Supported chips:
> +
> +  * Maxim MAX127
> +
> +    Prefix: 'max127'
> +
> +    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX127-MAX128.pdf
> +
> +Description
> +-----------
> +
> +The MAX127 is a multirange, 12-bit data acquisition system (DAS) providing
> +8 analog input channels that are independently software programmable for
> +a variety of ranges. The available ranges are {0,5V}, {0,10V}, {-5,5V}
> +and {-10,10V}.
> +
> +The MAX127 features a 2-wire, I2C-compatible serial interface that allows
> +communication among multiple devices using SDA and SCL lines.
> +
> +Sysfs interface
> +---------------
> +
> +  ============== ==============================================================
> +  in[0-7]_input  The input voltage (in mV) of the corresponding channel.
> +		 RO
> +
> +  in[0-7]_min    The lower input limit (in mV) for the corresponding channel.
> +		 ADC range and LSB will be updated when the limit is changed.
> +		 For the MAX127, it will be adjusted to -10000, -5000, or 0.
> +		 RW
> +
> +  in[0-7]_max    The higher input limit (in mV) for the corresponding channel.
> +		 ADC range and LSB will be updated when the limit is changed.
> +		 For the MAX127, it will be adjusted to 0, 5000, or 10000.
> +		 RW
> +  ============== ==============================================================

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