linux-kernel - Re: [PATCH v2] usb: typec: tps6598x: Add USB role switching logic

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Date:   Mon, 11 May 2020 13:46:03 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc:     linux-usb@...r.kernel.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, nikolaus.voss@...wensteinmedical.de,
        andriy.shevchenko@...ux.intel.com, garsilva@...eddedor.com,
        keescook@...omium.org
Subject: Re: [PATCH v2] usb: typec: tps6598x: Add USB role switching logic

Hi,

On Thu, May 07, 2020 at 10:59:38PM +0100, Bryan O'Donoghue wrote:
> @@ -452,6 +471,7 @@ static int tps6598x_probe(struct i2c_client *client)
>  {
>  	struct typec_capability typec_cap = { };
>  	struct tps6598x *tps;
> +	struct fwnode_handle *fwnode;
>  	u32 status;
>  	u32 conf;
>  	u32 vid;
> @@ -495,11 +515,21 @@ static int tps6598x_probe(struct i2c_client *client)
>  	if (ret < 0)
>  		return ret;
>  
> +	fwnode = device_get_named_child_node(&client->dev, "connector");
> +	if (!IS_ERR_OR_NULL(fwnode)) {
> +		tps->role_sw = fwnode_usb_role_switch_get(fwnode);
> +		if (IS_ERR(tps->role_sw)) {
> +			ret = PTR_ERR(tps->role_sw);
> +			goto err_fwnode_put;
> +		}
> +	}

        fwnode = device_get_named_child_node(&client->dev, "connector");
        if (IS_ERR(fwnode))
                return PTR_ERR(fwnode);

        tps->role_sw = fwnode_usb_role_switch_get(fwnode);
        if (IS_ERR(tps->role_sw)) {
        	ret = PTR_ERR(tps->role_sw);
        	goto err_fwnode_put;
        }

>  	typec_cap.revision = USB_TYPEC_REV_1_2;
>  	typec_cap.pd_revision = 0x200;
>  	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
>  	typec_cap.driver_data = tps;
>  	typec_cap.ops = &tps6598x_ops;
> +	typec_cap.fwnode = fwnode;
>  
>  	switch (TPS_SYSCONF_PORTINFO(conf)) {
>  	case TPS_PORTINFO_SINK_ACCESSORY:
> @@ -525,12 +555,16 @@ static int tps6598x_probe(struct i2c_client *client)
>  		typec_cap.data = TYPEC_PORT_DFP;
>  		break;
>  	default:
> -		return -ENODEV;
> +		ret = -ENODEV;
> +		goto err_role_put;
>  	}
>  
>  	tps->port = typec_register_port(&client->dev, &typec_cap);
> -	if (IS_ERR(tps->port))
> -		return PTR_ERR(tps->port);
> +	if (IS_ERR(tps->port)) {
> +		ret = PTR_ERR(tps->port);
> +		goto err_role_put;
> +	}
> +	fwnode_handle_put(fwnode);
>  
>  	if (status & TPS_STATUS_PLUG_PRESENT) {
>  		ret = tps6598x_connect(tps, status);
> @@ -545,12 +579,19 @@ static int tps6598x_probe(struct i2c_client *client)
>  	if (ret) {
>  		tps6598x_disconnect(tps, 0);
>  		typec_unregister_port(tps->port);
> -		return ret;
> +		goto err_role_put;
>  	}
>  
>  	i2c_set_clientdata(client, tps);
>  
>  	return 0;
> +
> +err_role_put:
> +	usb_role_switch_put(tps->role_sw);
> +err_fwnode_put:
> +	fwnode_handle_put(fwnode);
> +
> +	return ret;
>  }

thanks,

-- 
heikki