From mboxrd@z Thu Jan 1 00:00:00 1970 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=unavailable 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 44520C4332D 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 2700722D73 for ; Wed, 23 Dec 2020 13:44:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728620AbgLWNn7 (ORCPT ); Wed, 23 Dec 2020 08:43:59 -0500 Received: from mail-40134.protonmail.ch ([185.70.40.134]:44003 "EHLO mail-40134.protonmail.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728456AbgLWNn7 (ORCPT ); Wed, 23 Dec 2020 08:43:59 -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 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: devicetree@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 =20 #include +#include #include #include #include #include #include #include +#include =20 /* MAX8997_REG_STATUS4 */ #define DCINOK_SHIFT=09=091 @@ -31,6 +33,10 @@ struct charger_data { =09struct device *dev; =09struct max8997_dev *iodev; =09struct power_supply *battery; +=09struct regulator *reg; +=09struct extcon_dev *edev; +=09struct notifier_block extcon_nb; +=09struct work_struct extcon_work; }; =20 static enum power_supply_property max8997_battery_props[] =3D { @@ -88,6 +94,67 @@ static int max8997_battery_get_property(struct power_sup= ply *psy, =09return 0; } =20 +static void max8997_battery_extcon_evt_stop_work(void *data) +{ +=09struct charger_data *charger =3D data; + +=09cancel_work_sync(&charger->extcon_work); +} + +static void max8997_battery_extcon_evt_worker(struct work_struct *work) +{ +=09struct charger_data *charger =3D +=09 container_of(work, struct charger_data, extcon_work); +=09struct extcon_dev *edev =3D charger->edev; +=09int current_limit; + +=09if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) { +=09=09dev_dbg(charger->dev, "USB SDP charger is connected\n"); +=09=09current_limit =3D 450000; +=09} else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) { +=09=09dev_dbg(charger->dev, "USB DCP charger is connected\n"); +=09=09current_limit =3D 650000; +=09} else if (extcon_get_state(edev, EXTCON_CHG_USB_FAST) > 0) { +=09=09dev_dbg(charger->dev, "USB FAST charger is connected\n"); +=09=09current_limit =3D 650000; +=09} else if (extcon_get_state(edev, EXTCON_CHG_USB_SLOW) > 0) { +=09=09dev_dbg(charger->dev, "USB SLOW charger is connected\n"); +=09=09current_limit =3D 650000; +=09} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) { +=09=09dev_dbg(charger->dev, "USB CDP charger is connected\n"); +=09=09current_limit =3D 650000; +=09} else { +=09=09dev_dbg(charger->dev, "USB charger is diconnected\n"); +=09=09current_limit =3D -1; +=09} + +=09if (current_limit > 0) { +=09=09int ret =3D regulator_set_current_limit(charger->reg, current_limit,= current_limit); + +=09=09if (ret) { +=09=09=09dev_err(charger->dev, "failed to set current limit: %d\n", ret); +=09=09=09return; +=09=09} +=09=09ret =3D regulator_enable(charger->reg); +=09=09if (ret) +=09=09=09dev_err(charger->dev, "failed to enable regulator: %d\n", ret); +=09} else { +=09=09int ret =3D regulator_disable(charger->reg); + +=09=09if (ret) +=09=09=09dev_err(charger->dev, "failed to disable regulator: %d\n", ret); +=09} +} + +static int max8997_battery_extcon_evt(struct notifier_block *nb, +=09=09=09=09unsigned long event, void *param) +{ +=09struct charger_data *charger =3D +=09=09container_of(nb, struct charger_data, extcon_nb); +=09schedule_work(&charger->extcon_work); +=09return NOTIFY_OK; +} + static const struct power_supply_desc max8997_battery_desc =3D { =09.name=09=09=3D "max8997_pmic", =09.type=09=09=3D POWER_SUPPLY_TYPE_BATTERY, @@ -170,6 +237,28 @@ static int max8997_battery_probe(struct platform_devic= e *pdev) =09=09return PTR_ERR(charger->battery); =09} =20 +=09charger->reg =3D devm_regulator_get(&pdev->dev, "charger"); +=09charger->edev =3D extcon_get_edev_by_phandle(&pdev->dev, 0); +=09if (PTR_ERR(charger->reg) =3D=3D -EPROBE_DEFER || +=09 PTR_ERR(charger->edev) =3D=3D -EPROBE_DEFER) +=09=09return -EPROBE_DEFER; + +=09if (!IS_ERR(charger->reg) && !IS_ERR(charger->edev)) { +=09=09INIT_WORK(&charger->extcon_work, max8997_battery_extcon_evt_worker); +=09=09ret =3D devm_add_action(&pdev->dev, max8997_battery_extcon_evt_stop_= work, charger); +=09=09if (ret) { +=09=09=09dev_err(&pdev->dev, "failed to add extcon evt stop action: %d\n",= ret); +=09=09=09return ret; +=09=09} +=09=09charger->extcon_nb.notifier_call =3D max8997_battery_extcon_evt; +=09=09ret =3D devm_extcon_register_notifier_all(&pdev->dev, charger->edev, +=09=09=09=09=09=09=09&charger->extcon_nb); +=09=09if (ret) { +=09=09=09dev_err(&pdev->dev, "failed to register extcon notifier\n"); +=09=09=09return ret; +=09=09}; +=09} + =09return 0; } =20 --=20 2.25.1