linux-kernel - Re: [PATCH v3 2/2] usb: typec: ucsi: Implement ChromeOS UCSI driver

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Date: Tue, 9 Apr 2024 18:39:51 +0800
From: Tzung-Bi Shih <tzungbi@...nel.org>
To: Pavan Holla <pholla@...omium.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Benson Leung <bleung@...omium.org>,
	Guenter Roeck <groeck@...omium.org>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org,
	Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
	chrome-platform@...ts.linux.dev
Subject: Re: [PATCH v3 2/2] usb: typec: ucsi: Implement ChromeOS UCSI driver

On Mon, Apr 08, 2024 at 07:47:35PM -0700, Pavan Holla wrote:
> On Mon, Apr 8, 2024 at 1:13 AM Tzung-Bi Shih <tzungbi@...nel.org> wrote:
> >
> > How this driver get probed?  From drivers/mfd/cros_ec_dev.c?  If so, there is
> > no "cros-ec-ucsi" in the MFD driver yet.
> 
> Yes, this should get probed from drivers/mfd/cros_ec_dev.c. However, the
> corresponding change in the EC is still under review. I was planning to send
> it out once the EC change lands. Please let me know if you think that this
> review should wait until then.

I see.  The mfd patch is independent and can be sent later.

I was asking because the patch (and the series) don't reflect the message:
"This driver will be loaded if the ChromeOS EC implements a PPM."

However, include/linux/platform_data/cros_ec_commands.h (the previous patch in
the series) usually follows include/ec_commands.h[1].  We should wait until
the corresponding EC patches land.

[1]: https://chromium.googlesource.com/chromiumos/platform/ec/+/refs/heads/main/include/ec_commands.h