{"id":807549,"url":"http://patchwork.ozlabs.org/api/1.0/patches/807549/?format=json","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/1.0/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20170830094814.17758-7-hdegoede@redhat.com>","date":"2017-08-30T09:48:09","name":"[v3,06/11] staging: typec: fusb302: Add support for USB2 charger detection through extcon","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9b14638b1ed9688347ade753f5c9dd925fe35350","submitter":{"id":1893,"url":"http://patchwork.ozlabs.org/api/1.0/people/1893/?format=json","name":"Hans de Goede","email":"hdegoede@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20170830094814.17758-7-hdegoede@redhat.com/mbox/","series":[{"id":564,"url":"http://patchwork.ozlabs.org/api/1.0/series/564/?format=json","date":"2017-08-30T09:48:14","name":"Hookup typec power-negotation to the PMIC and charger","version":3,"mbox":"http://patchwork.ozlabs.org/series/564/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/807549/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=linux-i2c-owner@vger.kernel.org;\n\treceiver=)","ext-mx08.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx08.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=hdegoede@redhat.com"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xj13h1LYjz9t2R\n\tfor ;\n\tWed, 30 Aug 2017 19:51:12 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751730AbdH3Jsl (ORCPT );\n\tWed, 30 Aug 2017 05:48:41 -0400","from mx1.redhat.com ([209.132.183.28]:40182 \"EHLO mx1.redhat.com\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1751760AbdH3Jsj (ORCPT );\n\tWed, 30 Aug 2017 05:48:39 -0400","from smtp.corp.redhat.com\n\t(int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id CA2E8C0587F5;\n\tWed, 30 Aug 2017 09:48:38 +0000 (UTC)","from shalem.localdomain.com (ovpn-116-238.ams2.redhat.com\n\t[10.36.116.238])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 0D48A87C9A;\n\tWed, 30 Aug 2017 09:48:35 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com CA2E8C0587F5","From":"Hans de Goede ","To":"Darren Hart , Andy Shevchenko ,\n\tWolfram Sang , Sebastian Reichel ,\n\tGreg Kroah-Hartman ,\n\tGuenter Roeck ,\n\tHeikki Krogerus ","Cc":"Hans de Goede ,\n\tplatform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org,\n\tlinux-i2c@vger.kernel.org, Liam Breck ,\n\tTony Lindgren , linux-pm@vger.kernel.org,\n\tdevel@driverdev.osuosl.org, \"Yueyao (Nathan) Zhu\" ","Subject":"[PATCH v3 06/11] staging: typec: fusb302: Add support for USB2\n\tcharger detection through extcon","Date":"Wed, 30 Aug 2017 11:48:09 +0200","Message-Id":"<20170830094814.17758-7-hdegoede@redhat.com>","In-Reply-To":"<20170830094814.17758-1-hdegoede@redhat.com>","References":"<20170830094814.17758-1-hdegoede@redhat.com>","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.15","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.32]);\n\tWed, 30 Aug 2017 09:48:39 +0000 (UTC)","Sender":"linux-i2c-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"linux-i2c@vger.kernel.org"},"content":"The fusb302 port-controller relies on an external device doing USB2\ncharger-type detection.\n\nThe Intel Whiskey Cove PMIC with which the fusb302 is combined on some\nX86/ACPI platforms already has a charger-type detection driver which\nuses extcon to communicate the detected charger-type.\n\nRather then inventing a new API for USB2 charger-type detection\nspecifically for use with the tcpm code, this commit simply re-uses the\nexisting extcon API and uses that do USB2 charger detection.\n\nNote that the \"fcs,extcon-name\" property name is only for kernel internal\nuse by X86/ACPI platform code and as such is NOT documented in\nthe fusb302 devicetree bindings.\n\nCc: \"Yueyao (Nathan) Zhu\" \nSigned-off-by: Hans de Goede \n---\nChanges in v2:\n-Put extcon code directly in fusb302.c rather then introducing helpers\n which are only used by fusb302.c\n\nChanges in v3:\n-Improve commit message\n---\n drivers/staging/typec/fusb302/fusb302.c | 49 +++++++++++++++++++++++++++++++++\n 1 file changed, 49 insertions(+)","diff":"diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c\nindex 675161cf4f3a..6f007f66d597 100644\n--- a/drivers/staging/typec/fusb302/fusb302.c\n+++ b/drivers/staging/typec/fusb302/fusb302.c\n@@ -17,6 +17,7 @@\n #include \n #include \n #include \n+#include \n #include \n #include \n #include \n@@ -96,6 +97,7 @@ struct fusb302_chip {\n \n \tint gpio_int_n;\n \tint gpio_int_n_irq;\n+\tstruct extcon_dev *extcon;\n \n \tstruct workqueue_struct *wq;\n \tstruct delayed_work bc_lvl_handler;\n@@ -516,6 +518,38 @@ static int tcpm_get_vbus(struct tcpc_dev *dev)\n \treturn ret;\n }\n \n+static int tcpm_get_current_limit(struct tcpc_dev *dev)\n+{\n+\tstruct fusb302_chip *chip = container_of(dev, struct fusb302_chip,\n+\t\t\t\t\t\t tcpc_dev);\n+\tint current_limit = 0;\n+\tunsigned long timeout;\n+\n+\tif (!chip->extcon)\n+\t\treturn 0;\n+\n+\t/*\n+\t * USB2 Charger detection may still be in progress when we get here,\n+\t * this can take upto 600ms, wait 800ms max.\n+\t */\n+\ttimeout = jiffies + msecs_to_jiffies(800);\n+\tdo {\n+\t\tif (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1)\n+\t\t\tcurrent_limit = 500;\n+\n+\t\tif (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 ||\n+\t\t extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1)\n+\t\t\tcurrent_limit = 1500;\n+\n+\t\tif (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1)\n+\t\t\tcurrent_limit = 2000;\n+\n+\t\tmsleep(50);\n+\t} while (current_limit == 0 && time_before(jiffies, timeout));\n+\n+\treturn current_limit;\n+}\n+\n static int fusb302_set_cc_pull(struct fusb302_chip *chip,\n \t\t\t bool pull_up, bool pull_down)\n {\n@@ -1201,6 +1235,7 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)\n {\n \tfusb302_tcpc_dev->init = tcpm_init;\n \tfusb302_tcpc_dev->get_vbus = tcpm_get_vbus;\n+\tfusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit;\n \tfusb302_tcpc_dev->set_cc = tcpm_set_cc;\n \tfusb302_tcpc_dev->get_cc = tcpm_get_cc;\n \tfusb302_tcpc_dev->set_polarity = tcpm_set_polarity;\n@@ -1685,6 +1720,7 @@ static int fusb302_probe(struct i2c_client *client,\n \tstruct fusb302_chip *chip;\n \tstruct i2c_adapter *adapter;\n \tstruct device *dev = &client->dev;\n+\tconst char *name;\n \tint ret = 0;\n \tu32 v;\n \n@@ -1717,6 +1753,19 @@ static int fusb302_probe(struct i2c_client *client,\n \tif (!device_property_read_u32(dev, \"fcs,operating-sink-microwatt\", &v))\n \t\tchip->tcpc_config.operating_snk_mw = v / 1000;\n \n+\t/*\n+\t * Devicetree platforms should get extcon via phandle (not yet\n+\t * supported). On ACPI platforms, we get the name from a device prop.\n+\t * This device prop is for kernel internal use only and is expected\n+\t * to be set by the platform code which also registers the i2c client\n+\t * for the fusb302.\n+\t */\n+\tif (device_property_read_string(dev, \"fcs,extcon-name\", &name) == 0) {\n+\t\tchip->extcon = extcon_get_extcon_dev(name);\n+\t\tif (!chip->extcon)\n+\t\t\treturn -EPROBE_DEFER;\n+\t}\n+\n \tret = fusb302_debugfs_init(chip);\n \tif (ret < 0)\n \t\treturn ret;\n","prefixes":["v3","06/11"]}