From patchwork Tue Sep 29 02:40:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 297446 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.9 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BE27C4727E for ; Tue, 29 Sep 2020 02:41:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E68F208FE for ; Tue, 29 Sep 2020 02:41:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XiA2HNwe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727620AbgI2Ck6 (ORCPT ); Mon, 28 Sep 2020 22:40:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727481AbgI2Ckf (ORCPT ); Mon, 28 Sep 2020 22:40:35 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00740C0613D0 for ; Mon, 28 Sep 2020 19:40:34 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id d143so3266110ybh.11 for ; Mon, 28 Sep 2020 19:40:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=0vOYtUX6nxGpyeypdwvv4NVNsjMVik0aJftyO5AEz3A=; b=XiA2HNwesllsncCWy6EWbhFNGB5X7Qo5Y86Kh09BFQB9sEU5LPugnEay38gtAW8LAC ImIAaQYImRfNFMf/7BulQMQz2+gZYVTuHfskyARnsHgaKs4tLKSvNW8oZCqHxbetQz3Z M2FB2YKaU5GM4MYyaPMEfMh0njRMVrxB/iTNboaPX2ds/2ZvpICXMRnhxUL6YFbTo3YB 23G0lz+WaJnIAhjlwmdpQZAiVYWcqYAKs866t5soEXi6Gx2TFPW3Xw9wxTL9cBRMWCzw Au6SVnO/v4YCYDXuhJksGJJ7tz4MfQq8HQWOQWk9r/KN2vjxCKgA+3GA6HivatRtAdNq LBGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=0vOYtUX6nxGpyeypdwvv4NVNsjMVik0aJftyO5AEz3A=; b=aILg0rAA6fcuihNHzJAqyMr59OroOV+kshUVeQjlycOCR9wwY2bYSeUHmFHLGeNYPn Tjw9/AX7rKpX+L24XCGISwCz8g3rRhxBKlPMw8hCiXT8ylPriltcV8D0G0dibABgJUe+ cr5Jq017J+xsbCOT6QOq4ZLzTf0aOgEKnD8Ns82M6W6xKyCNo0Mdno6kUf6YnE8dLIgj XcbQPf7COniqySvNiMQx5BXw7R2wEjxTIUkAVsg+BkoPy7cDm6rbcUDThLz3xglD6DIX T0CZkQ3OMvbow/9pCZ82D5J92Hf3B9d1QdFPQRCIoac86C4rv1kK9XWSOOE05bYLcY63 cmgw== X-Gm-Message-State: AOAM532iL/z/IMm+S0O9ywgauNza1XUibvJBKvU6YwfDTplETaOK23o/ BIxkQ22B9o6HLbQe77Ju1P2FiKy9VYM= X-Google-Smtp-Source: ABdhPJzlPLBPLb6Gty7RRp/o9efIss3x7igMMIHRTAddL1A/gVoP5YPMjcviEyCItFHKHzCVpMxbmZIWTmo= Sender: "badhri via sendgmr" X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:1:f292:1cff:fee0:66cf]) (user=badhri job=sendgmr) by 2002:a25:e0d2:: with SMTP id x201mr3548640ybg.180.1601347234136; Mon, 28 Sep 2020 19:40:34 -0700 (PDT) Date: Mon, 28 Sep 2020 19:40:01 -0700 In-Reply-To: <20200929024004.244992-1-badhri@google.com> Message-Id: <20200929024004.244992-13-badhri@google.com> Mime-Version: 1.0 References: <20200929024004.244992-1-badhri@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v9 12/15] usb: typec: tcpm: Parse frs type-c current from device tree From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Rob Herring , Lee Jones , Mark Brown , Maxime Ripard , Alexandre Belloni , Thierry Reding , Prashant Malani , Badhri Jagan Sridharan Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org New source's current capability is now defined as string based device tree property through new-source-frs-typec-current. Refactor tcpm code to parse new-source-frs-typec-current and infer local port's new source current capability during frs. Signed-off-by: Badhri Jagan Sridharan --- v9 is the first version of this patch in this series to rebase TCPM code to read new source frs current from new-source-frs-typec-current. --- drivers/usb/typec/tcpm/tcpm.c | 41 +++++++++++++++++++---------------- include/linux/usb/typec.h | 12 ++++++++++ 2 files changed, 34 insertions(+), 19 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 02b7f623f584..d5a3e2b3bea2 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -180,16 +180,11 @@ enum adev_actions { ADEV_ATTENTION, }; -/* - * Initial current capability of the new source when vSafe5V is applied during PD3.0 Fast Role Swap. - * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0, - * Version 1.2" - */ -enum frs_typec_current { - FRS_NOT_SUPPORTED, - FRS_DEFAULT_POWER, - FRS_5V_1P5A, - FRS_5V_3A, +static const char * const typec_new_source_frs_current[] = { + [FRS_NOT_SUPPORTED] = "not-supported", + [FRS_DEFAULT_POWER] = "default", + [FRS_5V_1P5A] = "1.5A", + [FRS_5V_3A] = "3.0A", }; /* Events from low level driver */ @@ -364,7 +359,7 @@ struct tcpm_port { bool self_powered; /* FRS */ - enum frs_typec_current frs_current; + enum typec_new_source_frs_current new_source_frs_current; /* Sink caps have been queried */ bool sink_cap_done; @@ -1713,7 +1708,7 @@ static void tcpm_pd_data_request(struct tcpm_port *port, unsigned int cnt = pd_header_cnt_le(msg->header); unsigned int rev = pd_header_rev_le(msg->header); unsigned int i; - enum frs_typec_current frs_current; + enum typec_new_source_frs_current partner_frs_current; bool frs_enable; int ret; @@ -1786,12 +1781,13 @@ static void tcpm_pd_data_request(struct tcpm_port *port, for (i = 0; i < cnt; i++) port->sink_caps[i] = le32_to_cpu(msg->payload[i]); - frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >> + partner_frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >> PDO_FIXED_FRS_CURR_SHIFT; - frs_enable = frs_current && (frs_current <= port->frs_current); + frs_enable = partner_frs_current && (partner_frs_current <= + port->new_source_frs_current); tcpm_log(port, "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c", - frs_current, port->frs_current, frs_enable ? 'y' : 'n'); + partner_frs_current, port->new_source_frs_current, frs_enable ? 'y' : 'n'); if (frs_enable) { ret = port->tcpc->enable_frs(port->tcpc, true); tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret); @@ -4746,7 +4742,8 @@ static int tcpm_fw_get_caps(struct tcpm_port *port, { const char *cap_str; int ret; - u32 mw, frs_current; + u32 mw; + const char *new_source_frs_current; if (!fwnode) return -EINVAL; @@ -4817,9 +4814,15 @@ static int tcpm_fw_get_caps(struct tcpm_port *port, /* FRS can only be supported byb DRP ports */ if (port->port_type == TYPEC_PORT_DRP) { - ret = fwnode_property_read_u32(fwnode, "frs-typec-current", &frs_current); - if (ret >= 0 && frs_current <= FRS_5V_3A) - port->frs_current = frs_current; + ret = fwnode_property_read_string(fwnode, "new-source-frs-typec-current", + &new_source_frs_current); + if (!ret) { + ret = match_string(typec_new_source_frs_current, + ARRAY_SIZE(typec_new_source_frs_current), + new_source_frs_current); + if (ret >= 0) + port->new_source_frs_current = ret; + } } return 0; diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h index 9cb1bec94b71..76bb078a433c 100644 --- a/include/linux/usb/typec.h +++ b/include/linux/usb/typec.h @@ -72,6 +72,18 @@ enum typec_orientation { TYPEC_ORIENTATION_REVERSE, }; +/* + * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0, + * Version 1.2" + * Initial current capability of the new source when vSafe5V is applied. + */ +enum typec_new_source_frs_current { + FRS_NOT_SUPPORTED, + FRS_DEFAULT_POWER, + FRS_5V_1P5A, + FRS_5V_3A, +}; + /* * struct enter_usb_data - Enter_USB Message details * @eudo: Enter_USB Data Object