From patchwork Thu Mar 11 10:03:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 399052 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham 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 30402C4332B for ; Thu, 11 Mar 2021 10:04:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4D7164FC4 for ; Thu, 11 Mar 2021 10:04:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232225AbhCKKDk (ORCPT ); Thu, 11 Mar 2021 05:03:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232212AbhCKKDY (ORCPT ); Thu, 11 Mar 2021 05:03:24 -0500 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8A15C061761 for ; Thu, 11 Mar 2021 02:03:23 -0800 (PST) Received: by mail-qt1-x84a.google.com with SMTP id k4so15152269qtd.20 for ; Thu, 11 Mar 2021 02:03:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=Hcg8ctscEa0t8SSV4gNeUgkygeqJTngQzkOo9fh7MZE=; b=pY/arfFlAeunr2gBLh/qaucb9n4p2jHJsMQdzw2R0zgMiyRNgPIwWwpkUiUoegcP+P CpjC5aws7kQ6Br4CxtAGk8WrVQLzvTR4VOQdO9DrPZZ98A1Qd5hXZmEwmUM4b0XJIc/r ZeyVwVAH0W4hI3oowy8Rbr8SIoecXf+kenzXVRBpGloiUhf6mj2ESUI9PsWhSqaiAyjb PooBa28gYPzLgTGnN9eDzMrQaBmCUKYtNVe3UOC6oNFRu6eBd8WItgfFeqVdBAuXEMPN 26O2UrXUUVritRYagYxDjMjpKzRQAo2zLNBwA7Y2xwKe7NEHVaxri6uMV5okxs9LT3Gh RduA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=Hcg8ctscEa0t8SSV4gNeUgkygeqJTngQzkOo9fh7MZE=; b=Gnl2ipEaUxI1nu/InvCtDCmZxCxyv0MBFB7U6PbvRwfnYYOXrUFlWLRR07iBmt9Uxb FZDlgOTwpBfonH2gCNqS62TdKh9YYTAr13NdAHaus1PeWIiMXw+fgmZbDJiQxlNo9Bm2 3MkvgonWs5KTjx9/tza4rb7uskGUpgwUL716BqWgpejiVSLutzpfZBR9Nu3mq3M5Q9Zj O8Md/5465DGsoYWLRwl7AoDHssq+z1wu6ZE5MkE8aYdb05EnD7aAwpTF/1T09rr09PK4 pN3ETbY9VwQ889b5Cu4TFROs1FPLCvLlkXXXq25s/eFGmvEOyU4s/c5eeUAFi0Th2ncb rebg== X-Gm-Message-State: AOAM530LXDIkkxpdObD8ApOJXoyfDjb8JeGyEf3SbiRFF6iY0EFaszNB OyZxk4EuU5WCp3xCb1GnnUaL1U3FyUU= X-Google-Smtp-Source: ABdhPJwJfpnB5Bcd8nZ5NGE+1+XjO3DvogRTxHoA3Kak2RVpj+77JMe/TjEqDy0XIv3k30GGMUVXeMgRX9E= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:39e6:8b30:8665:4bec]) (user=badhri job=sendgmr) by 2002:a05:6214:1085:: with SMTP id o5mr6988474qvr.5.1615457003120; Thu, 11 Mar 2021 02:03:23 -0800 (PST) Date: Thu, 11 Mar 2021 02:03:12 -0800 In-Reply-To: <20210311100313.3591254-1-badhri@google.com> Message-Id: <20210311100313.3591254-3-badhri@google.com> Mime-Version: 1.0 References: <20210311100313.3591254-1-badhri@google.com> X-Mailer: git-send-email 2.31.0.rc2.261.g7f71774620-goog Subject: [PATCH 3/4] usb: typec: tcpci_maxim: configure charging & data paths From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Rob Herring Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kyle Tso , devicetree@vger.kernel.org, Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This change allows the driver to configure input current/voltage limit for the charging path. The driver sets current_max and voltage_max values of the power supply identified through chg-psy-name. The change also exposes the data_role and the orientation as a extcon interface for configuring the USB data controller. Signed-off-by: Badhri Jagan Sridharan --- drivers/usb/typec/tcpm/tcpci_maxim.c | 126 ++++++++++++++++++++++++++- 1 file changed, 125 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c index 041a1c393594..365ff4c18146 100644 --- a/drivers/usb/typec/tcpm/tcpci_maxim.c +++ b/drivers/usb/typec/tcpm/tcpci_maxim.c @@ -7,8 +7,11 @@ #include #include +#include +#include #include #include +#include #include #include #include @@ -46,6 +49,10 @@ struct max_tcpci_chip { struct device *dev; struct i2c_client *client; struct tcpm_port *port; + bool pd_capable; + bool attached; + struct power_supply *chg_psy; + struct extcon_dev *extcon; }; static const struct regmap_range max_tcpci_tcpci_range[] = { @@ -439,11 +446,92 @@ static int tcpci_init(struct tcpci *tcpci, struct tcpci_data *data) return -1; } +static int max_tcpci_get_current_limit(struct tcpci *tcpci, struct tcpci_data *data) +{ + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data); + union power_supply_propval val = {0}; + int ret; + + if (!chip->chg_psy) + return 0; + + ret = power_supply_get_property(chip->chg_psy, POWER_SUPPLY_PROP_CURRENT_MAX, &val); + return ret < 0 ? ret : val.intval; +} + +static int max_tcpci_set_current_limit(struct tcpci *tcpci, struct tcpci_data *data, u32 max_ma, + u32 mv) +{ + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data); + union power_supply_propval val; + int ret; + + if (!chip->chg_psy) + return 0; + + val.intval = mv; + ret = power_supply_set_property(chip->chg_psy, POWER_SUPPLY_PROP_VOLTAGE_MAX, &val); + if (ret < 0) + return ret; + + /* + * Disregard 0mA vote for Rp-default value. Rp-default current values + * would be inferred from other sources such BC1.2 and data stack. + */ + if (!chip->pd_capable && max_ma == 0 && chip->attached) + return 0; + + val.intval = max_ma; + return power_supply_set_property(chip->chg_psy, POWER_SUPPLY_PROP_CURRENT_MAX, &val); +} + +static void max_tcpci_set_pd_capable(struct tcpci *tcpci, struct tcpci_data *data, bool capable) +{ + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data); + + chip->pd_capable = capable; +} + +static void max_tcpci_set_roles(struct tcpci *tcpci, struct tcpci_data *data, bool attached, + enum typec_role role, enum typec_data_role data_role) +{ + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data); + + chip->attached = attached; + + if (!attached) { + extcon_set_state_sync(chip->extcon, EXTCON_USB_HOST, 0); + extcon_set_state_sync(chip->extcon, EXTCON_USB, 0); + return; + } + + extcon_set_state_sync(chip->extcon, data_role == TYPEC_HOST ? EXTCON_USB_HOST : EXTCON_USB, + 1); +} + +static void max_tcpci_set_cc_polarity(struct tcpci *tcpci, struct tcpci_data *data, + enum typec_cc_polarity polarity) +{ + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data); + + extcon_set_property(chip->extcon, EXTCON_USB, EXTCON_PROP_USB_TYPEC_POLARITY, + (union extcon_property_value)(int)polarity); + extcon_set_property(chip->extcon, EXTCON_USB_HOST, EXTCON_PROP_USB_TYPEC_POLARITY, + (union extcon_property_value)(int)polarity); +} + +static const unsigned int usbpd_extcon[] = { + EXTCON_USB, + EXTCON_USB_HOST, +}; + static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id *i2c_id) { int ret; struct max_tcpci_chip *chip; u8 power_status; + char *chg_psy_name; + struct device_node *dn; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); if (!chip) @@ -472,6 +560,11 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id chip->data.auto_discharge_disconnect = true; chip->data.vbus_vsafe0v = true; chip->data.set_partner_usb_comm_capable = max_tcpci_set_partner_usb_comm_capable; + chip->data.get_current_limit = max_tcpci_get_current_limit; + chip->data.set_current_limit = max_tcpci_set_current_limit; + chip->data.set_pd_capable = max_tcpci_set_pd_capable; + chip->data.set_roles = max_tcpci_set_roles; + chip->data.set_cc_polarity = max_tcpci_set_cc_polarity; max_tcpci_init_regs(chip); chip->tcpci = tcpci_register_port(chip->dev, &chip->data); @@ -484,9 +577,38 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id if (ret < 0) goto unreg_port; + dn = dev_of_node(&client->dev); + if (!dn) { + dev_err(&client->dev, "of node not found\n"); + ret = -EINVAL; + goto unreg_port; + } + chg_psy_name = (char *)of_get_property(dn, "chg-psy-name", NULL); + if (chg_psy_name) + chip->chg_psy = power_supply_get_by_name(chg_psy_name); + + chip->extcon = devm_extcon_dev_allocate(&client->dev, usbpd_extcon); + if (IS_ERR(chip->extcon)) { + dev_err(&client->dev, "Error allocating extcon: %ld\n", PTR_ERR(chip->extcon)); + ret = PTR_ERR(chip->extcon); + goto psy_put; + } + + ret = devm_extcon_dev_register(&client->dev, chip->extcon); + if (ret < 0) { + dev_err(&client->dev, "failed to register extcon device"); + goto psy_put; + } + + extcon_set_property_capability(chip->extcon, EXTCON_USB, EXTCON_PROP_USB_TYPEC_POLARITY); + extcon_set_property_capability(chip->extcon, EXTCON_USB_HOST, + EXTCON_PROP_USB_TYPEC_POLARITY); + device_init_wakeup(chip->dev, true); return 0; - +psy_put: + if (chip->chg_psy) + power_supply_put(chip->chg_psy); unreg_port: tcpci_unregister_port(chip->tcpci); @@ -499,6 +621,8 @@ static int max_tcpci_remove(struct i2c_client *client) if (!IS_ERR_OR_NULL(chip->tcpci)) tcpci_unregister_port(chip->tcpci); + if (chip->chg_psy) + power_supply_put(chip->chg_psy); return 0; }