linux-kernel - Re: [PATCH v3 1/5] hwmon: pmbus: Implement generic bus access delay

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <7ac1f26b-2a1c-433b-96bd-920d1846b04a@roeck-us.net>
Date: Mon, 2 Sep 2024 07:35:11 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Patrick Rudolph <patrick.rudolph@...ements.com>,
 linux-kernel@...r.kernel.org
Cc: jdelvare@...e.com, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v3 1/5] hwmon: pmbus: Implement generic bus access delay

On 9/2/24 00:53, Patrick Rudolph wrote:
> Some drivers, like the max15301 or zl6100, are intentionally delaying
> SMBus communications, to prevent transmission errors. As this is necessary
> on additional PMBus compatible devices, implement a generic delay mechanism
> in the pmbus core.
> 
> Introduces two delay settings in the pmbus_driver_info struct, one applies
> to every SMBus transaction and the other is for write transaction only.
> Once set by the driver the SMBus traffic, using the generic pmbus access
> helpers, is automatically delayed when necessary.
> 
> The two settings are:
> access_delay:
>    - Unit in microseconds
>    - Stores the accessed timestamp after every SMBus access
>    - Delays when necessary before the next SMBus access
> 
> write_delay:
>    - Unit in microseconds
>    - Stores the written timestamp after a write SMBus access
>    - Delays when necessary before the next SMBus access
> 
> This allows to drop the custom delay code from the drivers and easily
> introduce this feature in additional pmbus drivers.
> 
> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>

Series applied.

Thanks,
Guenter