linux-kernel - Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

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Date:   Mon, 24 Oct 2022 11:01:43 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Wayne Chang <waynec@...dia.com>
Cc:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, treding@...dia.com,
        jonathanh@...dia.com, thierry.reding@...il.com, ajayg@...dia.com,
        kishon@...com, vkoul@...nel.org, p.zabel@...gutronix.de,
        balbi@...nel.org, mathias.nyman@...el.com, jckuo@...dia.com,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, singhanc@...dia.com,
        linux-i2c@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known
 regex

On Mon, Oct 24, 2022 at 03:41:23PM +0800, Wayne Chang wrote:
> ccgx is refer to the cypress cypd4226 typec controller.
> Replace ccgx to well-known regex "cypress".
> 
> Signed-off-by: Wayne Chang <waynec@...dia.com>
> ---
>  drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> index 139707a2f3d6..5d3099e6eb77 100644
> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> @@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
>  	INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
>  
>  	/* Only fail FW flashing when FW build information is not provided */
> -	status = device_property_read_u16(dev, "ccgx,firmware-build",
> +	status = device_property_read_u16(dev, "cypress,firmware-build",
>  					  &uc->fw_build);
>  	if (status)
>  		dev_err(uc->dev, "failed to get FW build information\n");

This will break bisectability. You need to first add that
"cyppress,firmware-build" identifier without removing the old
"ccgx,firmware-build" identifier, and then introduce a separate
clean-up patch where you remove it when it's safe to remove:

1. Add new - This patch.
2. Modify users - PATCH 7/11.
3. Remove old - *missing*.

thanks,

-- 
heikki