Re: [PATCH v7 05/14] usb: typec: add API to get typec basic port power and data config

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On Mon, Jun 25, 2018 at 04:08:37PM +0800, Li Jun wrote:
> This patch adds 3 APIs to get the typec port power and data type,
> and preferred power role by its name string.
> 
> Signed-off-by: Li Jun <jun.li@xxxxxxx>

Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

> ---
>  drivers/usb/typec/class.c | 58 +++++++++++++++++++++++++++++++++++++++++++----
>  include/linux/usb/typec.h |  3 +++
>  2 files changed, 57 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 53df10d..6331059 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -796,12 +796,18 @@ static const char * const typec_data_roles[] = {
>  	[TYPEC_HOST]	= "host",
>  };
>  
> -static const char * const typec_port_types[] = {
> +static const char * const typec_port_power_roles[] = {
>  	[TYPEC_PORT_SRC] = "source",
>  	[TYPEC_PORT_SNK] = "sink",
>  	[TYPEC_PORT_DRP] = "dual",
>  };
>  
> +static const char * const typec_port_data_roles[] = {
> +	[TYPEC_PORT_DFP] = "host",
> +	[TYPEC_PORT_UFP] = "device",
> +	[TYPEC_PORT_DRD] = "dual",
> +};
> +
>  static const char * const typec_port_types_drp[] = {
>  	[TYPEC_PORT_SRC] = "dual [source] sink",
>  	[TYPEC_PORT_SNK] = "dual source [sink]",
> @@ -932,7 +938,7 @@ static ssize_t power_role_store(struct device *dev,
>  	mutex_lock(&port->port_type_lock);
>  	if (port->port_type != TYPEC_PORT_DRP) {
>  		dev_dbg(dev, "port type fixed at \"%s\"",
> -			     typec_port_types[port->port_type]);
> +			     typec_port_power_roles[port->port_type]);
>  		ret = -EOPNOTSUPP;
>  		goto unlock_and_ret;
>  	}
> @@ -973,7 +979,7 @@ port_type_store(struct device *dev, struct device_attribute *attr,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	ret = sysfs_match_string(typec_port_types, buf);
> +	ret = sysfs_match_string(typec_port_power_roles, buf);
>  	if (ret < 0)
>  		return ret;
>  
> @@ -1007,7 +1013,7 @@ port_type_show(struct device *dev, struct device_attribute *attr,
>  		return sprintf(buf, "%s\n",
>  			       typec_port_types_drp[port->port_type]);
>  
> -	return sprintf(buf, "[%s]\n", typec_port_types[port->cap->type]);
> +	return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]);
>  }
>  static DEVICE_ATTR_RW(port_type);
>  
> @@ -1252,6 +1258,50 @@ void typec_set_pwr_opmode(struct typec_port *port,
>  }
>  EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
>  
> +/**
> + * typec_find_port_power_role - Get the typec port power capability
> + * @name: port power capability string
> + *
> + * This routine is used to find the typec_port_type by its string name.
> + *
> + * Returns typec_port_type if success, otherwise negative error code.
> + */
> +int typec_find_port_power_role(const char *name)
> +{
> +	return match_string(typec_port_power_roles,
> +			    ARRAY_SIZE(typec_port_power_roles), name);
> +}
> +EXPORT_SYMBOL_GPL(typec_find_port_power_role);
> +
> +/**
> + * typec_find_power_role - Find the typec one specific power role
> + * @name: power role string
> + *
> + * This routine is used to find the typec_role by its string name.
> + *
> + * Returns typec_role if success, otherwise negative error code.
> + */
> +int typec_find_power_role(const char *name)
> +{
> +	return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
> +}
> +EXPORT_SYMBOL_GPL(typec_find_power_role);
> +
> +/**
> + * typec_find_port_data_role - Get the typec port data capability
> + * @name: port data capability string
> + *
> + * This routine is used to find the typec_port_data by its string name.
> + *
> + * Returns typec_port_data if success, otherwise negative error code.
> + */
> +int typec_find_port_data_role(const char *name)
> +{
> +	return match_string(typec_port_data_roles,
> +			    ARRAY_SIZE(typec_port_data_roles), name);
> +}
> +EXPORT_SYMBOL_GPL(typec_find_port_data_role);
> +
>  /* ------------------------------------------ */
>  /* API for Multiplexer/DeMultiplexer Switches */
>  
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index 672b39b..15f8d9a 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -267,4 +267,7 @@ int typec_set_orientation(struct typec_port *port,
>  			  enum typec_orientation orientation);
>  int typec_set_mode(struct typec_port *port, int mode);
>  
> +int typec_find_port_power_role(const char *name);
> +int typec_find_power_role(const char *name);
> +int typec_find_port_data_role(const char *name);
>  #endif /* __LINUX_USB_TYPEC_H */

Thanks,

-- 
heikki
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