linux-kernel - Re: [PATCH v4 5/9] usb: cdns3-ti: pass auxdata from match data to of_platform

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Message-ID: <bc361325-1510-4fe0-a7ee-bc5be0a1b4cc@kernel.org>
Date: Thu, 7 Mar 2024 14:38:38 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Théo Lebrun <theo.lebrun@...tlin.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Peter Chen <peter.chen@...nel.org>,
 Pawel Laszczak <pawell@...ence.com>, Nishanth Menon <nm@...com>,
 Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 Grégory Clement <gregory.clement@...tlin.com>,
 Kevin Hilman <khilman@...nel.org>, Alan Stern <stern@...land.harvard.edu>,
 linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 5/9] usb: cdns3-ti: pass auxdata from match data to
 of_platform_populate()



On 07/03/2024 11:55, Théo Lebrun wrote:
> Allow compatible to pick auxdata given to child platform devices.
> 
> No compatible exploits this functionality, just yet.
> 

This patch could be merged with Patch 7 so we know exactly how auxdata
is used?

> Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
> ---
>  drivers/usb/cdns3/cdns3-ti.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c
> index f76327566798..29fb24c811b3 100644
> --- a/drivers/usb/cdns3/cdns3-ti.c
> +++ b/drivers/usb/cdns3/cdns3-ti.c
> @@ -62,7 +62,8 @@ struct cdns_ti {
>  };
>  
>  struct cdns_ti_match_data {
> -	bool reset_on_resume;
> +	bool				reset_on_resume;
> +	const struct of_dev_auxdata	*auxdata;
>  };
>  
>  static const int cdns_ti_rate_table[] = {	/* in KHZ */
> @@ -95,6 +96,7 @@ static int cdns_ti_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct device_node *node = pdev->dev.of_node;
> +	const struct of_dev_auxdata *auxdata = NULL;
>  	struct cdns_ti *data;
>  	unsigned long rate;
>  	int error, i;
> @@ -149,7 +151,9 @@ static int cdns_ti_probe(struct platform_device *pdev)
>  		goto err;
>  	}
>  
> -	error = of_platform_populate(node, NULL, NULL, dev);
> +	if (data->match_data)
> +		auxdata = data->match_data->auxdata;
> +	error = of_platform_populate(node, NULL, auxdata, dev);
>  	if (error) {
>  		dev_err(dev, "failed to create children: %d\n", error);
>  		goto err;
> 

-- 
cheers,
-roger