From: Joel Stanley <joel@jms.id.au>
To: Alexander Soldatov <a.soldatov@yadro.com>
Cc: Lei YU <mine260309@gmail.com>,
OpenBMC Maillist <openbmc@lists.ozlabs.org>
Subject: Re: Romulus avsbus-control and vrm-control
Date: Fri, 24 May 2019 06:37:39 +0000 [thread overview]
Message-ID: <CACPK8XdrLBX_KhXcPen_97JbyyPOLWOKZXMU_Rvho=Q19D75Dg@mail.gmail.com> (raw)
In-Reply-To: <24ded2792fbf485689db57aad5f98626@yadro.com>
On Fri, 17 May 2019 at 07:48, Alexander Soldatov <a.soldatov@yadro.com> wrote:
>
> Hi Lei YU,
>
>
> There is some question about avsbus-control and vrm-control on the Romulus. There are no public documentation for the IR35221 chips, which are used in the Romulus. Could anyone explain what avsbus-control and vrm-control i2c command sequences do or give register description for the IR35221, please?
There's an upstream driver for this part that may help:
drivers/hwmon/pmbus/ir35221.c
There was a plan to replace (some?) of the scripts you reference with
the kernel driver. However these parts are powered by the same net as
the CPU, so when the host is powered off the hwmon driver cannot be
used. It would be good to come up with a kernel based solution here.
Cheers,
Joel
prev parent reply other threads:[~2019-05-24 6:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 7:48 Romulus avsbus-control and vrm-control Alexander Soldatov
2019-05-17 8:24 ` Lei YU
2019-05-24 6:37 ` Joel Stanley [this message]
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