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Message-ID: <SG2PR04MB55436F03F6CAD6D415FDEE40A102A@SG2PR04MB5543.apcprd04.prod.outlook.com>
Date: Mon, 24 Jul 2023 02:12:26 +0000
From: Delphine_CC_Chiu/WYHQ/Wiwynn <Delphine_CC_Chiu@...ynn.com>
To: Guenter Roeck <linux@...ck-us.net>
CC: "patrick@...cx.xyz" <patrick@...cx.xyz>,
Jean Delvare <jdelvare@...e.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
"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 v1 1/2] dt-bindings: hwmon: Add lltc ltc4286 driver
bindings
> -----Original Message-----
> From: Guenter Roeck <groeck7@...il.com> On Behalf Of Guenter Roeck
> Sent: Monday, April 24, 2023 9:50 PM
> To: Delphine_CC_Chiu/WYHQ/Wiwynn <Delphine_CC_Chiu@...ynn.com>
> Cc: patrick@...cx.xyz; Jean Delvare <jdelvare@...e.com>; Rob Herring
> <robh+dt@...nel.org>; Krzysztof Kozlowski
> <krzysztof.kozlowski+dt@...aro.org>; linux-i2c@...r.kernel.org;
> linux-hwmon@...r.kernel.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v1 1/2] dt-bindings: hwmon: Add lltc ltc4286 driver
> bindings
>
> Security Reminder: Please be aware that this email is sent by an external
> sender.
>
> On Mon, Apr 24, 2023 at 06:13:49PM +0800, Delphine CC Chiu wrote:
> > Add a device tree bindings for ltc4286 driver.
> >
> > Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
> > ---
> > .../bindings/hwmon/lltc,ltc4286.yaml | 47
> +++++++++++++++++++
> > MAINTAINERS | 9 ++++
> > 2 files changed, 56 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml
> > b/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml
> > new file mode 100644
> > index 000000000000..c1c8e310f9c4
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml
> > @@ -0,0 +1,47 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> > +https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fschemas%2Fhwmon%2Flltc%2Cltc4286.yaml%23&data=05%7C
> 01%7C
> >
> +Wayne_SC_Liu%40wiwynn.com%7Cac3bc6cdf556435cfa0f08db44cabd06%7C
> da6e06
> >
> +28fc834caf9dd273061cbab167%7C0%7C0%7C638179409777006260%7CUnk
> nown%7CT
> >
> +WFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLC
> JXVC
> >
> +I6Mn0%3D%7C3000%7C%7C%7C&sdata=8d9ycpebE%2FrhafDDmDL9sefo1xq
> m%2B9r%2F
> > +Wm0Cu1McEOs%3D&reserved=0
> > +$schema:
> > +https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7CWayne_S
> C_Liu%
> >
> +40wiwynn.com%7Cac3bc6cdf556435cfa0f08db44cabd06%7Cda6e0628fc834c
> af9dd
> >
> +273061cbab167%7C0%7C0%7C638179409777006260%7CUnknown%7CTWFp
> bGZsb3d8ey
> >
> +JWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D
> %7C30
> >
> +00%7C%7C%7C&sdata=u4yJaVeL2xSUE2%2FaNpEbQ3KJiy%2BcxtKG95gGuaGI
> LFU%3D&
> > +reserved=0
> > +
> > +title: LTC4286 power monitors
> > +
> > +maintainers:
> > + - Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
> > +
> > +properties:
> > + compatible:
> > + enum:
> > + - lltc,ltc4286
> > + - lltc,ltc4287
>
> There is no LTC4287, at least according to the Analog website.
It has been announced on Analog Devices website.
Please refer to this link: https://www.analog.com/en/products/ltc2487.html#product-overview
>
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + vrange_select_25p6:
> > + description:
> > + This property is a bool parameter to represent the
> > + voltage range is 25.6 or not for this chip.
>
> Existing attributes are adi,vrange-high-enable, ti,extended-range-enable,
> ti,bus-range-microvolt, adi,range-double. I would suggest to use
> adi,vrange-high-enable.
The vrange for this chip is either 102.4 or 25.6, and default is 102.4
So, we think vrange_select_25p6 may be more appropriate
>
> > +
> > + rsense-micro-ohms:
> > + description:
> > + Resistor value in micro-Ohm
>
> I would suggest either shunt-resistor-micro-ohms or
> sense-resistor-micro-ohms as used by other bindings.
We will revise to shunt-resistor-micro-ohms.
>
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - rsense-micro-ohms
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + i2c {
> > + status = "okay";
> > + ltc4286@40 {
> > + compatible = "lltc,ltc4286";
> > + reg = <0x40>;
> > + vrange_select_25p6;
> > + rsense-micro-ohms = <300>;
> > + };
> > + };
> > diff --git a/MAINTAINERS b/MAINTAINERS index
> > c6545eb54104..930bdba0f73c 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -12183,6 +12183,15 @@ S: Maintained
> > F: Documentation/hwmon/ltc4261.rst
> > F: drivers/hwmon/ltc4261.c
> >
> > +LTC4286 HARDWARE MONITOR DRIVER
> > +M: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
> > +L: linux-i2c@...r.kernel.org
> > +S: Maintained
> > +F: Documentation/devicetree/bindings/hwmon/lltc,ltc4286.yaml
> > +F: drivers/hwmon/pmbus/Kconfig
> > +F: drivers/hwmon/pmbus/Makefile
> > +F: drivers/hwmon/pmbus/ltc4286.c
> > +
> > LTC4306 I2C MULTIPLEXER DRIVER
> > M: Michael Hennerich <michael.hennerich@...log.com>
> > L: linux-i2c@...r.kernel.org
> > --
> > 2.17.1
> >
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