Re: [PATCH 5/7] usb: typec: tps6598x: Start using struct typec_operations

[Guenter Roeck <linux@roeck-us.net>]

On 10/1/19 2:48 AM, Heikki Krogerus wrote:
> Supplying the operation callbacks as part of a struct
> typec_operations instead of as part of struct
> typec_capability during port registration. After this there
> is not need to keep the capabilities stored anywhere in the
> driver.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---
>   drivers/usb/typec/tps6598x.c | 49 +++++++++++++++++++-----------------
>   1 file changed, 26 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
> index a38d1409f15b..0698addd1185 100644
> --- a/drivers/usb/typec/tps6598x.c
> +++ b/drivers/usb/typec/tps6598x.c
> @@ -94,7 +94,6 @@ struct tps6598x {
>   	struct typec_port *port;
>   	struct typec_partner *partner;
>   	struct usb_pd_identity partner_identity;
> -	struct typec_capability typec_cap;
>   };
>   
>   /*
> @@ -307,11 +306,10 @@ static int tps6598x_exec_cmd(struct tps6598x *tps, const char *cmd,
>   	return 0;
>   }
>   
> -static int
> -tps6598x_dr_set(const struct typec_capability *cap, enum typec_data_role role)
> +static int tps6598x_dr_set(struct typec_port *port, enum typec_data_role role)
>   {
> -	struct tps6598x *tps = container_of(cap, struct tps6598x, typec_cap);
>   	const char *cmd = (role == TYPEC_DEVICE) ? "SWUF" : "SWDF";
> +	struct tps6598x *tps = typec_get_drvdata(port);
>   	u32 status;
>   	int ret;
>   
> @@ -338,11 +336,10 @@ tps6598x_dr_set(const struct typec_capability *cap, enum typec_data_role role)
>   	return ret;
>   }
>   
> -static int
> -tps6598x_pr_set(const struct typec_capability *cap, enum typec_role role)
> +static int tps6598x_pr_set(struct typec_port *port, enum typec_role role)
>   {
> -	struct tps6598x *tps = container_of(cap, struct tps6598x, typec_cap);
>   	const char *cmd = (role == TYPEC_SINK) ? "SWSk" : "SWSr";
> +	struct tps6598x *tps = typec_get_drvdata(port);
>   	u32 status;
>   	int ret;
>   
> @@ -369,6 +366,11 @@ tps6598x_pr_set(const struct typec_capability *cap, enum typec_role role)
>   	return ret;
>   }
>   
> +static const struct typec_operations tps6598x_ops = {
> +	.dr_set = tps6598x_dr_set,
> +	.pr_set = tps6598x_pr_set,
> +};
> +
>   static irqreturn_t tps6598x_interrupt(int irq, void *data)
>   {
>   	struct tps6598x *tps = data;
> @@ -448,6 +450,7 @@ static const struct regmap_config tps6598x_regmap_config = {
>   
>   static int tps6598x_probe(struct i2c_client *client)
>   {
> +	struct typec_capability typec_cap = { };
>   	struct tps6598x *tps;
>   	u32 status;
>   	u32 conf;
> @@ -492,40 +495,40 @@ static int tps6598x_probe(struct i2c_client *client)
>   	if (ret < 0)
>   		return ret;
>   
> -	tps->typec_cap.revision = USB_TYPEC_REV_1_2;
> -	tps->typec_cap.pd_revision = 0x200;
> -	tps->typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
> -	tps->typec_cap.pr_set = tps6598x_pr_set;
> -	tps->typec_cap.dr_set = tps6598x_dr_set;
> +	typec_cap.revision = USB_TYPEC_REV_1_2;
> +	typec_cap.pd_revision = 0x200;
> +	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;

Nitpick:
	struct typec_capability typec_cap = {
		.revision = USB_TYPEC_REV_1_2,
		.pd_revision = 0x200,
		.prefer_role = TYPEC_NO_PREFERRED_ROLE,
	};

Your call, though.

> +	typec_cap.driver_data = tps;
> +	typec_cap.ops = &tps6598x_ops;
>   
>   	switch (TPS_SYSCONF_PORTINFO(conf)) {
>   	case TPS_PORTINFO_SINK_ACCESSORY:
>   	case TPS_PORTINFO_SINK:
> -		tps->typec_cap.type = TYPEC_PORT_SNK;
> -		tps->typec_cap.data = TYPEC_PORT_UFP;
> +		typec_cap.type = TYPEC_PORT_SNK;
> +		typec_cap.data = TYPEC_PORT_UFP;
>   		break;
>   	case TPS_PORTINFO_DRP_UFP_DRD:
>   	case TPS_PORTINFO_DRP_DFP_DRD:
> -		tps->typec_cap.type = TYPEC_PORT_DRP;
> -		tps->typec_cap.data = TYPEC_PORT_DRD;
> +		typec_cap.type = TYPEC_PORT_DRP;
> +		typec_cap.data = TYPEC_PORT_DRD;
>   		break;
>   	case TPS_PORTINFO_DRP_UFP:
> -		tps->typec_cap.type = TYPEC_PORT_DRP;
> -		tps->typec_cap.data = TYPEC_PORT_UFP;
> +		typec_cap.type = TYPEC_PORT_DRP;
> +		typec_cap.data = TYPEC_PORT_UFP;
>   		break;
>   	case TPS_PORTINFO_DRP_DFP:
> -		tps->typec_cap.type = TYPEC_PORT_DRP;
> -		tps->typec_cap.data = TYPEC_PORT_DFP;
> +		typec_cap.type = TYPEC_PORT_DRP;
> +		typec_cap.data = TYPEC_PORT_DFP;
>   		break;
>   	case TPS_PORTINFO_SOURCE:
> -		tps->typec_cap.type = TYPEC_PORT_SRC;
> -		tps->typec_cap.data = TYPEC_PORT_DFP;
> +		typec_cap.type = TYPEC_PORT_SRC;
> +		typec_cap.data = TYPEC_PORT_DFP;
>   		break;
>   	default:
>   		return -ENODEV;
>   	}
>   
> -	tps->port = typec_register_port(&client->dev, &tps->typec_cap);
> +	tps->port = typec_register_port(&client->dev, &typec_cap);
>   	if (IS_ERR(tps->port))
>   		return PTR_ERR(tps->port);
>   
>