staging: typec: tcpm: Add get_current_limit tcpc_dev callback (ea62cfc7) · Commits · 戴 / test

A Rp signalling the default current limit indicates that we're possibly connected to an USB2 power-source. In some cases the type-c port-controller may provide the capability to detect the current-limit in this case, through e.g. BC1.2 detection. This commit adds an optional get_current_limit tcpc_dev callback which allows the port-controller to provide current-limit detection for when the CC pin is pulled up with Rp. Signed-off-by:

Hans de Goede <hdegoede@redhat.com> Reviewed-by:

Guenter Roeck <linux@roeck-us.net> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/typec/tcpm.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -685,6 +685,9 @@ static u32 tcpm_get_current_limit(struct tcpm_port *port)
		break;
		case TYPEC_CC_RP_DEF:
		default:
		if (port->tcpc->get_current_limit)
		limit = port->tcpc->get_current_limit(port->tcpc);
		else
		limit = 0;
		break;
		}

drivers/staging/typec/tcpm.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -109,6 +109,13 @@ struct tcpc_dev {

		int (init)(struct tcpc_dev dev);
		int (get_vbus)(struct tcpc_dev dev);
		/*
		* This optional callback gets called by the tcpm core when configured
		* as a snk and cc=Rp-def. This allows the tcpm to provide a fallback
		* current-limit detection method for the cc=Rp-def case. E.g. some
		* tcpcs may include BC1.2 charger detection and use that in this case.
		*/
		int (get_current_limit)(struct tcpc_dev dev);
		int (set_cc)(struct tcpc_dev dev, enum typec_cc_status cc);
		int (get_cc)(struct tcpc_dev dev, enum typec_cc_status *cc1,
		enum typec_cc_status *cc2);

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