linux-kernel - Re: [PATCH v4 5/6] i2c: smbus: Support DDR5 SPD EEPROMs

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Message-ID: <dc73070a-d266-47ca-bb11-77c2d9d6dece@roeck-us.net>
Date: Tue, 18 Jun 2024 08:10:26 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: linux-hwmon@...r.kernel.org, linux-i2c@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Wolfram Sang <wsa+renesas@...g-engineering.com>,
 René Rebe <rene@...ctcode.de>,
 Thomas Weißschuh <linux@...ssschuh.net>,
 Armin Wolf <W_Armin@....de>, Stephen Horvath <s.horvath@...look.com.au>
Subject: Re: [PATCH v4 5/6] i2c: smbus: Support DDR5 SPD EEPROMs

Hi Paul,

On 6/18/24 07:59, Paul Menzel wrote:
[ ... ]

> I did
> 
>      $ tail -3 /etc/sensors3.conf
>      chip "spd5118-*"
>          set temp1_max 56000
>          set temp1_crit 84000
> 
> but it stays with the defaults:
> 
> ```
> $ sensors
> spd5118-i2c-0-53
> Adapter: SMBus I801 adapter at efa0
> temp1:        +20.8°C  (low  =  +0.0°C, high = +55.0°C)
>                         (crit low =  +0.0°C, crit = +85.0°C)
> 

You'd have to write directly into the attribute files.
For example, if you have

$ grep . /sys/class/hwmon/*/name
/sys/class/hwmon/hwmon0/name:nvme
/sys/class/hwmon/hwmon1/name:nct6687
/sys/class/hwmon/hwmon2/name:k10temp
/sys/class/hwmon/hwmon3/name:spd5118
/sys/class/hwmon/hwmon4/name:spd5118
/sys/class/hwmon/hwmon5/name:spd5118
/sys/class/hwmon/hwmon6/name:spd5118
/sys/class/hwmon/hwmon7/name:mt7921_phy0
/sys/class/hwmon/hwmon8/name:amdgpu

you could run

sudo bash -c 'echo 56000 > /sys/class/hwmon/hwmon3/temp1_max'

Thanks,
Guenter