Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752535Ab2JJEvq (ORCPT ); Wed, 10 Oct 2012 00:51:46 -0400 Received: from mga01.intel.com ([192.55.52.88]:7433 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752185Ab2JJEvo (ORCPT ); Wed, 10 Oct 2012 00:51:44 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,563,1344236400"; d="scan'208";a="232817322" From: Jenny TC To: myungjoo.ham@samsung.com, cw00.choi@samsung.com, linux-kernel@vger.kernel.org Cc: jenny.tc@intel.com Subject: [PATCH] extcon : callback function to read cable property Date: Wed, 10 Oct 2012 15:53:48 +0530 Message-Id: <1349864628-21479-1-git-send-email-jenny.tc@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1881 Lines: 54 For some cables a boolean variable will not be enough to represent the state and properties of the cable. For example a charger cable can have states CONNECT,DISCOONECT,SUSPEND(Host suspend for SDP cable), RESUME(Host wakeup), and UPDATE (to increase the charge current after USB enumaeration).Also the properties of the cable may vary based on the state. FOr example in SUSPENDED state platforms can support 0/100/500/950(USB 3.0) mA based on the HW. To initiate charging the consumer should be able to get the charger properties dynamically. Signed-off-by: Jenny TC --- include/linux/extcon.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/extcon.h b/include/linux/extcon.h index 073fd49..2e61ee0 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -122,6 +122,7 @@ struct extcon_dev { /* --- Optional callbacks to override class functions --- */ ssize_t (*print_name)(struct extcon_dev *edev, char *buf); ssize_t (*print_state)(struct extcon_dev *edev, char *buf); + int (*get_cable_properties)(const char *cable_name, void *cable_props); /* --- Internal data. Please do not set. --- */ struct device *dev; @@ -177,6 +178,19 @@ struct extcon_specific_cable_nb { unsigned long previous_value; }; +enum extcon_chrgr_cbl_stat { + EXTCON_CHRGR_CABLE_CONNECTED, + EXTCON_CHRGR_CABLE_DISCONNECTED, + EXTCON_CHRGR_CABLE_SUSPENDED, + EXTCON_CHRGR_CABLE_RESUMED, + EXTCON_CHRGR_CABLE_UPDATED, +}; + +struct extcon_chrgr_cbl_props { + enum extcon_chrgr_cbl_stat cable_stat; + unsigned long mA; +}; + #if IS_ENABLED(CONFIG_EXTCON) /* -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/