linux-kernel - Re: [PATCH 0/2] platform/chrome: cros_ec_framework

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Date: Mon, 6 May 2024 08:09:07 -0500
From: "Limonciello, Mario" <mario.limonciello@....com>
To: Thomas Weißschuh <linux@...ssschuh.net>,
 Lee Jones <lee@...nel.org>, Benson Leung <bleung@...omium.org>,
 Guenter Roeck <groeck@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>
Cc: linux-kernel@...r.kernel.org, chrome-platform@...ts.linux.dev,
 "Dustin L. Howett" <dustin@...ett.net>, Sebastian Reichel <sre@...nel.org>,
 linux-pm@...r.kernel.org
Subject: Re: [PATCH 0/2] platform/chrome: cros_ec_framework_laptop: new driver



On 5/6/2024 1:09 AM, Thomas Weißschuh wrote:
> On 2024-05-05 22:56:33+0000, Thomas Weißschuh wrote:
>> Framework Laptops are using embedded controller firmware based on the
>> ChromeOS EC project.
>> In addition to the standard upstream commands some vendor-specific
>> commands are implemented.
>>
>> Add a driver that implements battery charge thresholds using these
>> custom commands.
> 
> It turns out that standard ChromesOS EC defines EC_CMD_CHARGE_CONTROL.
> The kernel headers however only define v1 of the protocol, which is very
> limited.
> 
> But in the upstream firmware repo there is a v3 which is much better.
> 
> The Framework laptop only implements v2 which is also fine.
> Given that v3 was only introduced late last year, it seems better to
> stick to v2 anyways for now.
> 
> So please disregard Patch 2, I'll see on how to use this via a normal
> cros_ec driver.
> 
> There are some other Framework-only features that will use Patch 1,
> so feedback for that would still be good.

What other kinds of features do you have in mind?

Considering your above finding I think it's better to put patch 1 into 
the series of "other framework only features" that will use it so it's 
clearer if it's the best way or not.

> 
>> Patch 1 adds the general scaffolding and device binding.
>> Patch 2 implements the battery charge thresholds.
>>
>> This series is based on
>> https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-next
>>
>> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
>> ---
>> Thomas Weißschuh (2):
>>        platform/chrome: cros_ec_framework_laptop: introduce driver
>>        platform/chrome: cros_ec_framework_laptop: implement battery charge thresholds
>>
>>   MAINTAINERS                                        |   5 +
>>   drivers/mfd/cros_ec_dev.c                          |  13 ++
>>   drivers/platform/chrome/Kconfig                    |  11 ++
>>   drivers/platform/chrome/Makefile                   |   1 +
>>   drivers/platform/chrome/cros_ec_framework_laptop.c | 173 +++++++++++++++++++++
>>   5 files changed, 203 insertions(+)
>> ---
>> base-commit: 2fbe479c0024e1c6b992184a799055e19932aa48
>> change-id: 20240505-cros_ec-framework-10e627c46a0a
>>
>> Best regards,
>> -- 
>> Thomas Weißschuh <linux@...ssschuh.net>
>>