From patchwork Mon Mar 20 10:07:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Wang X-Patchwork-Id: 13180885 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0951DC6FD1D for ; Mon, 20 Mar 2023 10:08:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230126AbjCTKIh (ORCPT ); Mon, 20 Mar 2023 06:08:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229888AbjCTKIU (ORCPT ); Mon, 20 Mar 2023 06:08:20 -0400 Received: from mail-m11879.qiye.163.com (mail-m11879.qiye.163.com [115.236.118.79]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC7442528C; Mon, 20 Mar 2023 03:07:51 -0700 (PDT) Received: from localhost.localdomain (unknown [58.22.7.114]) by mail-m11879.qiye.163.com (Hmail) with ESMTPA id 858E76802E6; Mon, 20 Mar 2023 18:07:16 +0800 (CST) From: Frank Wang To: linux@roeck-us.net, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org, heiko@sntech.de Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, huangtao@rock-chips.com, william.wu@rock-chips.com, jianwei.zheng@rock-chips.com, yubing.zhang@rock-chips.com, wmc@rock-chips.com, Frank Wang Subject: [PATCH v2 3/3] usb: typec: tcpm: add get max power support Date: Mon, 20 Mar 2023 18:07:11 +0800 Message-Id: <20230320100711.3708-4-frank.wang@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230320100711.3708-1-frank.wang@rock-chips.com> References: <20230320100711.3708-1-frank.wang@rock-chips.com> X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZQx1KGlYYH0hOTRofGktPGkNVEwETFh oSFyQUDg9ZV1kYEgtZQVlOQ1VJSVVMVUpKT1lXWRYaDxIVHRRZQVlPS0hVSkpLSEpMVUpLS1VLWQ Y+ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6NDo6SQw5Qj0OCxFLSj0LHzUW HSpPCTZVSlVKTUxCSEtNQ0hMTUtDVTMWGhIXVR0JGhUQVQwaFRw7CRQYEFYYExILCFUYFBZFWVdZ EgtZQVlOQ1VJSVVMVUpKT1lXWQgBWUFIS05NNwY+ X-HM-Tid: 0a86fe7ccb902eb5kusn858e76802e6 X-HM-MType: 1 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Traverse fixed pdos to calculate the maximum power that the charger can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT property. Signed-off-by: Frank Wang --- drivers/usb/typec/tcpm/tcpm.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 13830b5e2d09f..d6ad3cdf9e4af 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -6320,6 +6320,27 @@ static int tcpm_psy_get_current_now(struct tcpm_port *port, return 0; } +static int tcpm_psy_get_input_power_limit(struct tcpm_port *port, + union power_supply_propval *val) +{ + unsigned int src_mv, src_ma, max_src_mw = 0; + unsigned int i, tmp; + + for (i = 0; i < port->nr_source_caps; i++) { + u32 pdo = port->source_caps[i]; + + if (pdo_type(pdo) == PDO_TYPE_FIXED) { + src_mv = pdo_fixed_voltage(pdo); + src_ma = pdo_max_current(pdo); + tmp = src_mv * src_ma / 1000; + max_src_mw = tmp > max_src_mw ? tmp : max_src_mw; + } + } + + val->intval = max_src_mw; + return 0; +} + static int tcpm_psy_get_prop(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -6349,6 +6370,9 @@ static int tcpm_psy_get_prop(struct power_supply *psy, case POWER_SUPPLY_PROP_CURRENT_NOW: ret = tcpm_psy_get_current_now(port, val); break; + case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT: + tcpm_psy_get_input_power_limit(port, val); + break; default: ret = -EINVAL; break;