Hi, On 05/14/2018 11:36 AM, Jun Li wrote: > Hi >> -----Original Message----- >> From: Mats Karrman [mailto:mats.dev.list@xxxxxxxxx] >> Sent: 2018年5月12日 3:56 >> To: Jun Li <jun.li@xxxxxxx>; robh+dt@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; >> heikki.krogerus@xxxxxxxxxxxxxxx; linux@xxxxxxxxxxxx >> Cc: a.hajda@xxxxxxxxxxx; cw00.choi@xxxxxxxxxxx; >> shufan_lee@xxxxxxxxxxx; Peter Chen <peter.chen@xxxxxxx>; >> gsomlo@xxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-usb@xxxxxxxxxxxxxxx; >> dl-linux-imx <linux-imx@xxxxxxx> >> Subject: Re: [PATCH v5 05/14] usb: typec: add API to get typec basic port power >> and data config >> >> Hi Li Jun, >> >> On 2018-05-03 02:24, 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> >>> --- >>> drivers/usb/typec/class.c | 52 >> +++++++++++++++++++++++++++++++++++++++++++++++ >>> include/linux/usb/typec.h | 3 +++ >>> 2 files changed, 55 insertions(+) >>> >>> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c >>> index 53df10d..5981e18 100644 >>> --- a/drivers/usb/typec/class.c >>> +++ b/drivers/usb/typec/class.c >>> @@ -9,6 +9,7 @@ >>> #include <linux/device.h> >>> #include <linux/module.h> >>> #include <linux/mutex.h> >>> +#include <linux/property.h> >>> #include <linux/slab.h> >>> #include <linux/usb/typec.h> >>> #include <linux/usb/typec_mux.h> >>> @@ -802,6 +803,12 @@ static const char * const typec_port_types[] = { >>> [TYPEC_PORT_DRP] = "dual", >>> }; >>> >>> +static const char * const typec_data_types[] = { >>> + [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]", @@ -1252,6 +1259,51 >> @@ >>> void typec_set_pwr_opmode(struct typec_port *port, >>> } >>> EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); >>> >>> +/** >>> + * typec_find_power_type - Get the typec port power type >> Why is this function called typec_find_power_type() and not >> typec_find_port_type()? >> It's called port_type in sysfs, having different names just adds confusion. >> (Otherwise I agree power_type is a better name but...) > We have "port type" before the power and data role separation, > this API name's intention is to reflect the power cap, anyway I > leave this to be decided by Heikki then. >>> + * @name: port type 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_power_type(const char *name) { >>> + return match_string(typec_port_types, ARRAY_SIZE(typec_port_types), >>> + name); >>> +} >>> +EXPORT_SYMBOL_GPL(typec_find_power_type); >>> + >>> +/** >>> + * typec_find_preferred_role - Find the typec drp port preferred >>> +power role >> Why typec_find_preferred_role()? Could be used for any power_role so why not >> typec_find_power_role()? > I am not sure if I catch your point of this comment. > For preferred role(if support try.sink or try.src) the only allowed power roles are > "sink" > "source" > But for power role, the allowed type are > "sink" > "source" > "dual" Uhm, typing too fast again, I am. A better name would be just typec_find_role(). What I mean is that the function could be used for any situation when someone wants to map a string to a TYPEC_{SOURCE,SINK} constant so it is unnecessary to limit its usage to just preferred role. // Mats > Thanks > Li Jun >> BR // Mats >> >>> + * @name: power role string >>> + * >>> + * This routine is used to find the typec_role by its string name of >>> + * preferred power role(Try.SRC or Try.SNK). >>> + * >>> + * Returns typec_role if success, otherwise negative error code. >>> + */ >>> +int typec_find_preferred_role(const char *name) { >>> + return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); } >>> +EXPORT_SYMBOL_GPL(typec_find_preferred_role); >>> + >>> +/** >>> + * typec_find_data_type - Get the typec port data capability >>> + * @name: data type 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_data_type(const char *name) { >>> + return match_string(typec_data_types, ARRAY_SIZE(typec_data_types), >>> + name); >>> +} >>> +EXPORT_SYMBOL_GPL(typec_find_data_type); >>> + >>> /* ------------------------------------------ */ >>> /* API for Multiplexer/DeMultiplexer Switches */ >>> >>> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h >>> index 672b39b..00c93e7 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_power_type(const char *name); int >>> +typec_find_preferred_role(const char *name); int >>> +typec_find_data_type(const char *name); >>> #endif /* __LINUX_USB_TYPEC_H */ -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
