From patchwork Thu Oct 8 06:15:53 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: 11822225 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7D3E413B2 for ; Thu, 8 Oct 2020 06:16:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A63B20782 for ; Thu, 8 Oct 2020 06:16:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="uTtb7+of" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728839AbgJHGQ5 (ORCPT ); Thu, 8 Oct 2020 02:16:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728853AbgJHGQj (ORCPT ); Thu, 8 Oct 2020 02:16:39 -0400 Received: from mail-qk1-x749.google.com (mail-qk1-x749.google.com [IPv6:2607:f8b0:4864:20::749]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B9C0C0613D5 for ; Wed, 7 Oct 2020 23:16:28 -0700 (PDT) Received: by mail-qk1-x749.google.com with SMTP id u2so3190021qka.2 for ; Wed, 07 Oct 2020 23:16:28 -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=0afO4rLOQPn7gMI304N6qXvrtGMWMCYRRtjs+1Xakek=; b=uTtb7+ofg2OG2cMxwvSTM2ldRGL9kdaDpJYxmAGOxlU+yr3Pf6MYmh72p3yN1ZAsZX efWu1MU32eMvtPiiJncf7TWqHAsFyz9sVVk1tK/Jn3evALFgUaRvRTYo8vQuhjXjHnzz SfWLx1OmApfzw3IecLiCLTq1fBw6yQd9mdE/9QxOCaUxm/2BNej6YvCmmRF6lKwYwqAs ls6P5dVR7LD3cCOzYYHO2EVlY8F80qCr85fLvtYibkuQnHsns8ugy0J3vfdB/Zoapaik z9++1Y3n+yOfk6SONNEaV+M0Fm3xu2FyqMJoiG+Un/GFJWCO03WFSxx4BkSEVouFDpuF QJvw== 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=0afO4rLOQPn7gMI304N6qXvrtGMWMCYRRtjs+1Xakek=; b=lyH3i5aw6pxWhJl8HnC1A3r0YTQpWUKWu6KBUgD9PLS9/veJ9lPNl4Fgrvgau/I4DB BdrpiR6z69jutZ80JzmRS9wWl4bHxauqzV48bEwBeAGR10phHxVNwt9p3PnR4mNKYb9Q TLX+cHtY8akriMg3NzT7t6FTdF1NGiGxa2hlBO8F5fWmduFo9Sjvo1dj6F07w/HnN+ry 8LW5yELiCXy38RYDhtgBZ5ffMaWJJzqE3pYrvCkIlW1N+TGhEbckyxKKpcW8OiQPFnjM EBOasD4mq71VObnWkeI+lpkZenKPGrz+sALFgU9YsmzTFEKmnEf1n8Af1H6X2tEgWDs/ zwOg== X-Gm-Message-State: AOAM530dtEpyMa+Eergdc188Dx6wTtHNreVJF1OHzsgK98/xjXnZ522F r6KuJMHdz2Yw9KoMZnAbGJrTDxDsKls= X-Google-Smtp-Source: ABdhPJw7WhaRaqeR0L0lv1rj1FaUtUibazC8dkI2MQFvFXuAhurO32cj3J0XQeNK5domXhl9EEiQoRnQ7lY= 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:a0c:b39a:: with SMTP id t26mr6518189qve.19.1602137787303; Wed, 07 Oct 2020 23:16:27 -0700 (PDT) Date: Wed, 7 Oct 2020 23:15:53 -0700 In-Reply-To: <20201008061556.1402293-1-badhri@google.com> Message-Id: <20201008061556.1402293-13-badhri@google.com> Mime-Version: 1.0 References: <20201008061556.1402293-1-badhri@google.com> X-Mailer: git-send-email 2.28.0.806.g8561365e88-goog Subject: [PATCH v10 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, Amelie Delaunay 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. No changes since v9. --- 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 6be558045942..3198b89fa451 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