Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753162AbdHOUF2 (ORCPT ); Tue, 15 Aug 2017 16:05:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33793 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753022AbdHOUFX (ORCPT ); Tue, 15 Aug 2017 16:05:23 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 100315372 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=hdegoede@redhat.com From: Hans de Goede To: Wolfram Sang , Guenter Roeck , Heikki Krogerus , Sebastian Reichel , Darren Hart , Andy Shevchenko , Greg Kroah-Hartman Cc: Hans de Goede , Liam Breck , Tony Lindgren , linux-i2c@vger.kernel.org, linux-pm@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH v2 02/14] staging: typec: tcpm: Add get_current_limit tcpc_dev callback Date: Tue, 15 Aug 2017 22:04:50 +0200 Message-Id: <20170815200502.17339-3-hdegoede@redhat.com> In-Reply-To: <20170815200502.17339-1-hdegoede@redhat.com> References: <20170815200502.17339-1-hdegoede@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 15 Aug 2017 20:05:23 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1937 Lines: 54 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 --- Changes in v2: -s/get_usb2_current_limit/get_current_limit/ --- drivers/staging/typec/tcpm.c | 5 ++++- drivers/staging/typec/tcpm.h | 7 +++++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/staging/typec/tcpm.c b/drivers/staging/typec/tcpm.c index 20eb4eb..8e823af 100644 --- a/drivers/staging/typec/tcpm.c +++ b/drivers/staging/typec/tcpm.c @@ -660,7 +660,10 @@ static u32 tcpm_get_current_limit(struct tcpm_port *port) break; case TYPEC_CC_RP_DEF: default: - limit = 0; + if (port->tcpc->get_current_limit) + limit = port->tcpc->get_current_limit(port->tcpc); + else + limit = 0; break; } diff --git a/drivers/staging/typec/tcpm.h b/drivers/staging/typec/tcpm.h index 19c307d..1465668 100644 --- a/drivers/staging/typec/tcpm.h +++ b/drivers/staging/typec/tcpm.h @@ -108,6 +108,13 @@ 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); -- 2.9.4