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

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Date: Tue, 18 Jun 2024 17:25:13 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Guenter Roeck <linux@...ck-us.net>
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

Dear Guenter,


Am 18.06.24 um 17:10 schrieb Guenter Roeck:
> 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'

     $ sudo bash -c 'echo 56000 > /sys/class/hwmon/hwmon3/temp1_max'
     bash: line 1: echo: write error: No such device or address


Kind regards,

Paul