linux-kernel - Re: [PATCH v2 2/4] usb: typec: tipd: add function to request firmware

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Date: Tue, 19 Dec 2023 13:50:58 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Javier Carrasco <javier.carrasco@...fvision.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] usb: typec: tipd: add function to request firmware

On Thu, Dec 14, 2023 at 05:29:10PM +0100, Javier Carrasco wrote:
> The firmware request process is device agnostic and can be used for
> other parts.
> 
> Signed-off-by: Javier Carrasco <javier.carrasco@...fvision.net>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tipd/core.c | 35 ++++++++++++++++++++++++++---------
>  1 file changed, 26 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index f0c4cd571a37..83e5eeecdf5c 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -873,6 +873,30 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
>  	return 0;
>  }
>  
> +static int tps_request_firmware(struct tps6598x *tps, const struct firmware **fw)
> +{
> +	const char *firmware_name;
> +	int ret;
> +
> +	ret = device_property_read_string(tps->dev, "firmware-name",
> +					  &firmware_name);
> +	if (ret)
> +		return ret;
> +
> +	ret = request_firmware(fw, firmware_name, tps->dev);
> +	if (ret) {
> +		dev_err(tps->dev, "failed to retrieve \"%s\"\n", firmware_name);
> +		return ret;
> +	}
> +
> +	if ((*fw)->size == 0) {
> +		release_firmware(*fw);
> +		ret = -EINVAL;
> +	}
> +
> +	return ret;
> +}
> +
>  static int
>  tps25750_write_firmware(struct tps6598x *tps,
>  			u8 bpms_addr, const u8 *data, size_t len)
> @@ -961,16 +985,9 @@ static int tps25750_start_patch_burst_mode(struct tps6598x *tps)
>  	if (ret)
>  		return ret;
>  
> -	ret = request_firmware(&fw, firmware_name, tps->dev);
> -	if (ret) {
> -		dev_err(tps->dev, "failed to retrieve \"%s\"\n", firmware_name);
> +	ret = tps_request_firmware(tps, &fw);
> +	if (ret)
>  		return ret;
> -	}
> -
> -	if (fw->size == 0) {
> -		ret = -EINVAL;
> -		goto release_fw;
> -	}
>  
>  	ret = of_property_match_string(np, "reg-names", "patch-address");
>  	if (ret < 0) {
> 
> -- 
> 2.39.2

-- 
heikki