From patchwork Wed Dec 2 04:08:40 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: 336496 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 A38C7C64E90 for ; Wed, 2 Dec 2020 04:09:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB972221E9 for ; Wed, 2 Dec 2020 04:09:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387485AbgLBEJ3 (ORCPT ); Tue, 1 Dec 2020 23:09:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387479AbgLBEJ3 (ORCPT ); Tue, 1 Dec 2020 23:09:29 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA049C061A04 for ; Tue, 1 Dec 2020 20:08:48 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id z3so361627ybc.0 for ; Tue, 01 Dec 2020 20:08:48 -0800 (PST) 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=bhuIWbpu6FdJx5JrXNuQlsi08GfmooSMSEdjQVGorE8=; b=M0j6Ff/q/vb+xRcydAOACekI0KNqgy8p0TBSABbNJun+7927Ftk9FuzEQLwbQpJw2T nltS5LSPbYJ/lhZnDMG0mExt6DpIO3BeabGNddhkbbwODvYn9ecW1WIgoUGbfTCQ46m0 ZOsvGj+aiJL4TGTK+O1ST5DiN1KJKEpGZ1DnyBUcv26vFncQEZjxpMu9tWADdunfRHGl tjCIQGBxr1ZZyaNhyAWR7c654xiwP0t0IIwjf2XrJ7O6q6+Clb/PCm2WHM1BrzCyqIAD lee/DRuhFP+PxgJk3PR2pWITzgHOktTTJrhCdl3iVM6M1rtwtPyqmbYrgM13Yme5jDqw Eplg== 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=bhuIWbpu6FdJx5JrXNuQlsi08GfmooSMSEdjQVGorE8=; b=lUjo+L8F9dgmmhRge6Rmtm/rA1jurWceLrWIhk/NfT//nlPgvUXLFz+kx6ilQ+q1ti Kwyp8VCTcXlZ3+upA0EiZAT3BGRIuTYKcUvDnr5qluZgSv+h5vXW93IQDPeipag1R6Ql oyLq/4zvx1zDtGBIJitb/VoPuDiBi2+9r3f6HrW0RFsiJVc++VvoJWbX7zojJlUzhFfY aX6mPRjAb6NQ38apshSIn9Gdl/EWGaMuCbCPTUMMX85tNTzAz7tAKryZ7AfFlJ21UafD Gj975WsbnMeTLYT3s9dsANK1rdWYh/4arAob58bJE3j+/pcA5Q6d+laZR7sBE22C43Fx X1HA== X-Gm-Message-State: AOAM533PyeXEtANGo5ZpPYDd1/1w6YfmC3gA+MkYtw6W+jtQypb4RJpm /WyOS/+P70GvK8P8vgrQY6ve9YKK5Sg= X-Google-Smtp-Source: ABdhPJw1O7Q1ymh1n46yPe1RPHJcZ/ALGgKKGQ6sN8Ec58cqaXJXSQjCBrWq9ZNz0HA3ZTlsz+AGdJ1oAF4= Sender: "badhri via sendgmr" X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:f292:1cff:fee0:66cf]) (user=badhri job=sendgmr) by 2002:a5b:10:: with SMTP id a16mr1024380ybp.242.1606882128094; Tue, 01 Dec 2020 20:08:48 -0800 (PST) Date: Tue, 1 Dec 2020 20:08:40 -0800 In-Reply-To: <20201202040840.663578-1-badhri@google.com> Message-Id: <20201202040840.663578-3-badhri@google.com> Mime-Version: 1.0 References: <20201202040840.663578-1-badhri@google.com> X-Mailer: git-send-email 2.29.2.576.ga3fc446d84-goog Subject: [PATCH v2 3/3] usb: typec: tcpci_maxim: Enable VSAFE0V signalling From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Unmask EXTENDED_STATUS_MASK.vSafe0V, ALERT.Extended_Status and set vbus_vsafe0v to enable VSAFE0V signalling. Signed-off-by: Badhri Jagan Sridharan Acked-by: Heikki Krogerus Reviewed-by: Guenter Roeck --- Changes since v1: - Setting auto_discharge_disconnect to true instead of 1 as suggested by Guenter. --- drivers/usb/typec/tcpm/tcpci_maxim.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c index c1797239bf08..319266329b42 100644 --- a/drivers/usb/typec/tcpm/tcpci_maxim.c +++ b/drivers/usb/typec/tcpm/tcpci_maxim.c @@ -112,11 +112,18 @@ static void max_tcpci_init_regs(struct max_tcpci_chip *chip) return; } + /* Enable VSAFE0V detection */ + ret = max_tcpci_write8(chip, TCPC_EXTENDED_STATUS_MASK, TCPC_EXTENDED_STATUS_VSAFE0V); + if (ret < 0) { + dev_err(chip->dev, "Unable to unmask TCPC_EXTENDED_STATUS_VSAFE0V ret:%d\n", ret); + return; + } + alert_mask = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_TX_FAILED | TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_RX_STATUS | TCPC_ALERT_CC_STATUS | TCPC_ALERT_VBUS_DISCNCT | TCPC_ALERT_RX_BUF_OVF | TCPC_ALERT_POWER_STATUS | /* Enable Extended alert for detecting Fast Role Swap Signal */ - TCPC_ALERT_EXTND; + TCPC_ALERT_EXTND | TCPC_ALERT_EXTENDED_STATUS; ret = max_tcpci_write16(chip, TCPC_ALERT_MASK, alert_mask); if (ret < 0) { @@ -315,6 +322,12 @@ static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status) } } + if (status & TCPC_ALERT_EXTENDED_STATUS) { + ret = max_tcpci_read8(chip, TCPC_EXTENDED_STATUS, (u8 *)®_status); + if (ret >= 0 && (reg_status & TCPC_EXTENDED_STATUS_VSAFE0V)) + tcpm_vbus_change(chip->port); + } + if (status & TCPC_ALERT_RX_STATUS) process_rx(chip, status); @@ -442,6 +455,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id chip->data.init = tcpci_init; chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus; chip->data.auto_discharge_disconnect = true; + chip->data.vbus_vsafe0v = true; max_tcpci_init_regs(chip); chip->tcpci = tcpci_register_port(chip->dev, &chip->data);