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-rw-r--r--include/linux/extcon.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index d57e52443841..242157cad25d 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -53,6 +53,10 @@
* the USB connector, which means EXTCON_CHG_USB_SDP should always
* appear together with EXTCON_USB. The same as ACA charger connector,
* EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
+ *
+ * The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
+ * current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
+ * least 1A of current at 5V.
*/
#define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
#define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */