From patchwork Wed Dec 23 13:43:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Timon Baetz X-Patchwork-Id: 351678 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=-17.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED 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 1A672C43381 for ; Wed, 23 Dec 2020 13:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC1FE22D73 for ; Wed, 23 Dec 2020 13:44:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728722AbgLWNn6 (ORCPT ); Wed, 23 Dec 2020 08:43:58 -0500 Received: from mail-40131.protonmail.ch ([185.70.40.131]:12506 "EHLO mail-40131.protonmail.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728620AbgLWNn6 (ORCPT ); Wed, 23 Dec 2020 08:43:58 -0500 Date: Wed, 23 Dec 2020 13:43:05 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail; t=1608730994; bh=9wHdlba958TRj1U+SHOgHG41KMeJbu8JkCvhqbM6Jd8=; h=Date:To:From:Cc:Reply-To:Subject:In-Reply-To:References:From; b=wiN3XCRr4Lw0d6bhZUOiR86UF3ab93OpHUGfSTPOjvQeC9HS/VVUKPMY0joyGcoZ4 VJq3jm/XK/7jIhzawHJy3jnO8v4OAQtuRX8rnqf3UwAaPWpIT/hYmzPV00wXrYWBi5 dYF0dvggl6VQ7Z2kZDX/R3agKCgbGXubmIHsMwpE= To: Krzysztof Kozlowski From: Timon Baetz Cc: Liam Girdwood , Mark Brown , Rob Herring , MyungJoo Ham , Chanwoo Choi , Lee Jones , Sebastian Reichel , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-pm@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Timon Baetz Reply-To: Timon Baetz Subject: [PATCH v4 4/7] power: supply: max8997_charger: Set CHARGER current limit Message-ID: <20201223134221.804943-4-timon.baetz@protonmail.com> In-Reply-To: <20201223134221.804943-1-timon.baetz@protonmail.com> References: <20201223134221.804943-1-timon.baetz@protonmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Register for extcon notification and set charging current depending on the detected cable type. Current values are taken from vendor kernel, where most charger types end up setting 650mA [0]. Also enable and disable the CHARGER regulator based on extcon events. [0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/misc/max8997-muic.c#L1675-L1678 Signed-off-by: Timon Baetz --- drivers/power/supply/max8997_charger.c | 89 ++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/drivers/power/supply/max8997_charger.c b/drivers/power/supply/max8997_charger.c index 1947af25879a..e8532e2af451 100644 --- a/drivers/power/supply/max8997_charger.c +++ b/drivers/power/supply/max8997_charger.c @@ -6,12 +6,14 @@ // MyungJoo Ham #include +#include #include #include #include #include #include #include +#include /* MAX8997_REG_STATUS4 */ #define DCINOK_SHIFT 1 @@ -31,6 +33,10 @@ struct charger_data { struct device *dev; struct max8997_dev *iodev; struct power_supply *battery; + struct regulator *reg; + struct extcon_dev *edev; + struct notifier_block extcon_nb; + struct work_struct extcon_work; }; static enum power_supply_property max8997_battery_props[] = { @@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_supply *psy, return 0; } +static void max8997_battery_extcon_evt_stop_work(void *data) +{ + struct charger_data *charger = data; + + cancel_work_sync(&charger->extcon_work); +} + +static void max8997_battery_extcon_evt_worker(struct work_struct *work) +{ + struct charger_data *charger = + container_of(work, struct charger_data, extcon_work); + struct extcon_dev *edev = charger->edev; + int current_limit; + + if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) { + dev_dbg(charger->dev, "USB SDP charger is connected\n"); + current_limit = 450000; + } else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) { + dev_dbg(charger->dev, "USB DCP charger is connected\n"); + current_limit = 650000; + } else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) { + dev_dbg(charger->dev, "USB FAST charger is connected\n"); + current_limit = 650000; + } else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) { + dev_dbg(charger->dev, "USB SLOW charger is connected\n"); + current_limit = 650000; + } else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) { + dev_dbg(charger->dev, "USB CDP charger is connected\n"); + current_limit = 650000; + } else { + dev_dbg(charger->dev, "USB charger is diconnected\n"); + current_limit = -1; + } + + if (current_limit > 0) { + int ret = regulator_set_current_limit(charger->reg, current_limit, current_limit); + + if (ret) { + dev_err(charger->dev, "failed to set current limit: %d\n", ret); + return; + } + ret = regulator_enable(charger->reg); + if (ret) + dev_err(charger->dev, "failed to enable regulator: %d\n", ret); + } else { + int ret = regulator_disable(charger->reg); + + if (ret) + dev_err(charger->dev, "failed to disable regulator: %d\n", ret); + } +} + +static int max8997_battery_extcon_evt(struct notifier_block *nb, + unsigned long event, void *param) +{ + struct charger_data *charger = + container_of(nb, struct charger_data, extcon_nb); + schedule_work(&charger->extcon_work); + return NOTIFY_OK; +} + static const struct power_supply_desc max8997_battery_desc = { .name = "max8997_pmic", .type = POWER_SUPPLY_TYPE_BATTERY, @@ -170,6 +237,28 @@ static int max8997_battery_probe(struct platform_device *pdev) return PTR_ERR(charger->battery); } + charger->reg = devm_regulator_get(&pdev->dev, "charger"); + charger->edev = extcon_get_edev_by_phandle(&pdev->dev, 0); + if (PTR_ERR(charger->reg) == -EPROBE_DEFER || + PTR_ERR(charger->edev) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + if (!IS_ERR(charger->reg) && !IS_ERR(charger->edev)) { + INIT_WORK(&charger->extcon_work, max8997_battery_extcon_evt_worker); + ret = devm_add_action(&pdev->dev, max8997_battery_extcon_evt_stop_work, charger); + if (ret) { + dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n", ret); + return ret; + } + charger->extcon_nb.notifier_call = max8997_battery_extcon_evt; + ret = devm_extcon_register_notifier_all(&pdev->dev, charger->edev, + &charger->extcon_nb); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon notifier\n"); + return ret; + }; + } + return 0; }