| Message ID | 20200914164639.1487650-2-angus@akkea.ca (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | RFC: USB C extcon patchset for the tps6598x | expand |
Hi, On 9/15/20 1:46 AM, Angus Ainslie wrote: > USB type C, USB BC1.2 and USB power delivery allow different voltages > and currents for VBUS so we need these additional properties. > > Also USB type C allows separate device and power roles so add a VBUS SRC > property. > > Signed-off-by: Angus Ainslie <angus@akkea.ca> > --- > include/linux/extcon.h | 17 ++++++++++++++++- > 1 file changed, 16 insertions(+), 1 deletion(-) > > diff --git a/include/linux/extcon.h b/include/linux/extcon.h > index fd183fb9c20f..c4d48f4f74c4 100644 > --- a/include/linux/extcon.h > +++ b/include/linux/extcon.h > @@ -117,14 +117,29 @@ > * @type: integer (intval) > * @value: 0 (USB/USB2) or 1 (USB3) > * @default: 0 (USB/USB2) > + * - EXTCON_PROP_USB_VBUS_SRC Could you explain more correct meaning of both sink and source? > + * @type: integer (intval) > + * @value: 0 (sink) or 1 (source) > + * @default: 0 (sink) > + * - EXTCON_PROP_USB_VBUS_VOLTAGE > + * @type: integer (intval) > + * @value: negotiated vbus voltage in mV > + * @default: 5000 Could you suggest the data why do you set default value as 5000? > + * - EXTCON_PROP_USB_VBUS_CURRENT > + * @type: integer (intval) > + * @value: negotiated vbus current in mA > + * @default: 100 ditto. Why default value is 100? > * > */ > #define EXTCON_PROP_USB_VBUS 0 > #define EXTCON_PROP_USB_TYPEC_POLARITY 1 > #define EXTCON_PROP_USB_SS 2 > +#define EXTCON_PROP_USB_VBUS_SRC 3 > +#define EXTCON_PROP_USB_VBUS_VOLTAGE 4 > +#define EXTCON_PROP_USB_VBUS_CURRENT 5 > > #define EXTCON_PROP_USB_MIN 0 > -#define EXTCON_PROP_USB_MAX 2 > +#define EXTCON_PROP_USB_MAX 5 > #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1) > > /* Properties of EXTCON_TYPE_CHG. */ >
Hi, On 2020-09-14 18:40, Chanwoo Choi wrote: > Hi, > > On 9/15/20 1:46 AM, Angus Ainslie wrote: >> USB type C, USB BC1.2 and USB power delivery allow different voltages >> and currents for VBUS so we need these additional properties. >> >> Also USB type C allows separate device and power roles so add a VBUS >> SRC >> property. >> >> Signed-off-by: Angus Ainslie <angus@akkea.ca> >> --- >> include/linux/extcon.h | 17 ++++++++++++++++- >> 1 file changed, 16 insertions(+), 1 deletion(-) >> >> diff --git a/include/linux/extcon.h b/include/linux/extcon.h >> index fd183fb9c20f..c4d48f4f74c4 100644 >> --- a/include/linux/extcon.h >> +++ b/include/linux/extcon.h >> @@ -117,14 +117,29 @@ >> * @type: integer (intval) >> * @value: 0 (USB/USB2) or 1 (USB3) >> * @default: 0 (USB/USB2) >> + * - EXTCON_PROP_USB_VBUS_SRC > > Could you explain more correct meaning of both sink and source? > Sure I can add some comments. >> + * @type: integer (intval) >> + * @value: 0 (sink) or 1 (source) >> + * @default: 0 (sink) >> + * - EXTCON_PROP_USB_VBUS_VOLTAGE >> + * @type: integer (intval) >> + * @value: negotiated vbus voltage in mV >> + * @default: 5000 > > Could you suggest the data why do you set default value as 5000? > The lowest USB VBUS is 5V so I can add that to the comments. >> + * - EXTCON_PROP_USB_VBUS_CURRENT >> + * @type: integer (intval) >> + * @value: negotiated vbus current in mA >> + * @default: 100 > > ditto. Why default value is 100? > USB spec says that until the current is negotiated the max that anything can draw is 100mA. I can add a comment to that effect. Thanks Angus >> * >> */ >> #define EXTCON_PROP_USB_VBUS 0 >> #define EXTCON_PROP_USB_TYPEC_POLARITY 1 >> #define EXTCON_PROP_USB_SS 2 >> +#define EXTCON_PROP_USB_VBUS_SRC 3 >> +#define EXTCON_PROP_USB_VBUS_VOLTAGE 4 >> +#define EXTCON_PROP_USB_VBUS_CURRENT 5 >> >> #define EXTCON_PROP_USB_MIN 0 >> -#define EXTCON_PROP_USB_MAX 2 >> +#define EXTCON_PROP_USB_MAX 5 >> #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - >> EXTCON_PROP_USB_MIN + 1) >> >> /* Properties of EXTCON_TYPE_CHG. */ >>
diff --git a/include/linux/extcon.h b/include/linux/extcon.h index fd183fb9c20f..c4d48f4f74c4 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -117,14 +117,29 @@ * @type: integer (intval) * @value: 0 (USB/USB2) or 1 (USB3) * @default: 0 (USB/USB2) + * - EXTCON_PROP_USB_VBUS_SRC + * @type: integer (intval) + * @value: 0 (sink) or 1 (source) + * @default: 0 (sink) + * - EXTCON_PROP_USB_VBUS_VOLTAGE + * @type: integer (intval) + * @value: negotiated vbus voltage in mV + * @default: 5000 + * - EXTCON_PROP_USB_VBUS_CURRENT + * @type: integer (intval) + * @value: negotiated vbus current in mA + * @default: 100 * */ #define EXTCON_PROP_USB_VBUS 0 #define EXTCON_PROP_USB_TYPEC_POLARITY 1 #define EXTCON_PROP_USB_SS 2 +#define EXTCON_PROP_USB_VBUS_SRC 3 +#define EXTCON_PROP_USB_VBUS_VOLTAGE 4 +#define EXTCON_PROP_USB_VBUS_CURRENT 5 #define EXTCON_PROP_USB_MIN 0 -#define EXTCON_PROP_USB_MAX 2 +#define EXTCON_PROP_USB_MAX 5 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1) /* Properties of EXTCON_TYPE_CHG. */
USB type C, USB BC1.2 and USB power delivery allow different voltages and currents for VBUS so we need these additional properties. Also USB type C allows separate device and power roles so add a VBUS SRC property. Signed-off-by: Angus Ainslie <angus@akkea.ca> --- include/linux/extcon.h | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)