From patchwork Wed Aug 30 09:48:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 807546 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xj12h1W9cz9sNn for ; Wed, 30 Aug 2017 19:50:20 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751834AbdH3Jsv (ORCPT ); Wed, 30 Aug 2017 05:48:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35930 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751760AbdH3Jst (ORCPT ); Wed, 30 Aug 2017 05:48:49 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7DCD7C047B66; Wed, 30 Aug 2017 09:48:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 7DCD7C047B66 Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=hdegoede@redhat.com Received: from shalem.localdomain.com (ovpn-116-238.ams2.redhat.com [10.36.116.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6711787CA4; Wed, 30 Aug 2017 09:48:45 +0000 (UTC) From: Hans de Goede To: Darren Hart , Andy Shevchenko , Wolfram Sang , Sebastian Reichel , Greg Kroah-Hartman , Guenter Roeck , Heikki Krogerus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Liam Breck , Tony Lindgren , linux-pm@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH v3 09/11] power: supply: bq24190_charger: Get input_current_limit from our supplier Date: Wed, 30 Aug 2017 11:48:12 +0200 Message-Id: <20170830094814.17758-10-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 (mx1.redhat.com [10.5.110.31]); Wed, 30 Aug 2017 09:48:49 +0000 (UTC) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org On some devices the USB Type-C port power (USB PD 2.0) negotiation is done by a separate port-controller IC, while the current limit is controlled through another (charger) IC. It has been decided to model this by modelling the external Type-C power brick (adapter/charger) as a power-supply class device which supplies the charger-IC, with its voltage-now and current-max representing the negotiated voltage and max current draw. This commit adds support for this to the bq24190_charger driver by adding an external_power_changed callback and calling power_supply_set_input_current_limit_from_supplier from this callback. This callback will only get called if the bq24190 has a parent-supply. Note this replaces the functionality to get the current-limit from an extcon device, which will be removed in a follow-up commit. Signed-off-by: Hans de Goede Acked-by: Tony Lindgren --- Changes in v2: -Wait a bit before applying current-max from our supplier as input-current-limit the bq24190 may still be in its power-good wait-state while our supplier is done negotating current-max and if we apply the limit to early then the input-current-limit will be reset to 0.5A by the bq24190 after its power-good wait is done. Changes in v3: -Drop the input-current-limit-from-supplier device-property, simply always sync the input-current-limit with the parent-supply if a parent-supply is present --- drivers/power/supply/bq24190_charger.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c index e606a078b0dd..35ff406aca48 100644 --- a/drivers/power/supply/bq24190_charger.c +++ b/drivers/power/supply/bq24190_charger.c @@ -165,6 +165,7 @@ struct bq24190_dev_info { struct extcon_dev *extcon; struct notifier_block extcon_nb; struct delayed_work extcon_work; + struct delayed_work input_current_limit_work; char model_name[I2C_NAME_SIZE]; bool initialized; bool irq_event; @@ -1210,6 +1211,32 @@ static int bq24190_charger_property_is_writeable(struct power_supply *psy, return ret; } +static void bq24190_input_current_limit_work(struct work_struct *work) +{ + struct bq24190_dev_info *bdi = + container_of(work, struct bq24190_dev_info, + input_current_limit_work.work); + + power_supply_set_input_current_limit_from_supplier(bdi->charger); +} + +/* Sync the input-current-limit with our parent supply (if we have one) */ +static void bq24190_charger_external_power_changed(struct power_supply *psy) +{ + struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy); + + /* + * The Power-Good detection may take up to 220ms, sometimes + * the external charger detection is quicker, and the bq24190 will + * reset to iinlim based on its own charger detection (which is not + * hooked up when using external charger detection) resulting in a + * too low default 500mA iinlim. Delay setting the input-current-limit + * for 300ms to avoid this. + */ + queue_delayed_work(system_wq, &bdi->input_current_limit_work, + msecs_to_jiffies(300)); +} + static enum power_supply_property bq24190_charger_properties[] = { POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_HEALTH, @@ -1240,6 +1267,7 @@ static const struct power_supply_desc bq24190_charger_desc = { .get_property = bq24190_charger_get_property, .set_property = bq24190_charger_set_property, .property_is_writeable = bq24190_charger_property_is_writeable, + .external_power_changed = bq24190_charger_external_power_changed, }; /* Battery power supply property routines */ @@ -1758,6 +1786,8 @@ static int bq24190_probe(struct i2c_client *client, mutex_init(&bdi->f_reg_lock); bdi->f_reg = 0; bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */ + INIT_DELAYED_WORK(&bdi->input_current_limit_work, + bq24190_input_current_limit_work); i2c_set_clientdata(client, bdi);