From patchwork Tue Mar 26 17:32:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 10871721 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9EEC71390 for ; Tue, 26 Mar 2019 17:32:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89FDC28AA1 for ; Tue, 26 Mar 2019 17:32:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7DDC628D25; Tue, 26 Mar 2019 17:32:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 94D3228AA1 for ; Tue, 26 Mar 2019 17:32:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732226AbfCZRcf (ORCPT ); Tue, 26 Mar 2019 13:32:35 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:32958 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732196AbfCZRce (ORCPT ); Tue, 26 Mar 2019 13:32:34 -0400 Received: by mail-wm1-f66.google.com with SMTP id z6so2922550wmi.0 for ; Tue, 26 Mar 2019 10:32:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=3gd23OActv3HicXypZ2SLtUqva0QC77NLMp1lMjE7gQ=; b=cGtTExgcStIrSyGEtExj6ZaaN97idEwwQqibprWCmUSuJUFqCIMOzHfu6ol0XlVtuk dWER6YVIlMfOfyTc1jFrbo06ldxXciRidNkAQIfghZwdyR+N6t/InsAAsGf2nTJMLSiP KAB32MRAMFEd3XbHXKInxYs5RZZSDSPYF/RTQ8yXMPqYROokxt6PhdhkcP8TVGvsw07g V7+aWIWaML4GEOF24kwe5gRiVFtGQvj9GyoXtB0uIl5MjZq/2UlNUozO7uiD30bfnh4N 7ijyvk1pL7TDs4L1ldljt1mJjdrTQ1mW5XV0zqLG0dLJ7jktEI9prsE18RV99qNmOlYB e2IQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3gd23OActv3HicXypZ2SLtUqva0QC77NLMp1lMjE7gQ=; b=CprzG9DfKcPLjWRnZvf9qWK/sS8sYkpoGQfPxdmF3sJCZhDpuMo2vYWRn991lRooTQ iuUg5M4aY+cWSQsuOeM30NTOG/VJlyq2NXe8L9WhRpJLNBVntTpp1JLJvorscVGgeXYY ZOBcvhpfshE/qoziVbcnSjAx57w8yZ+1EpBW450GluI9991CXqtUavH2N1aeXEaiKnzK 4GRpZ3+ajEspZst38BG4pXAklhvj9QRMDxhk+N/3OSFprsxUiRibZ3odQWk1mHgvvY0H qE9HIaLQUazxCYbozW2rvDcer+Z5PnBDcqNBE5S0SKjDs17Zj17wOqRwMFBRn30cSvQb eDQw== X-Gm-Message-State: APjAAAViIABquNKPkegBndMiVgZypgrCXlJ2V5WE+N3jSnk7X8ABkMT7 XlQfrTar3CMJsGVrD2PM/io3Hg== X-Google-Smtp-Source: APXvYqyOPBzYTlDzqKYB6FRySngFxhc8Qcxhtl5n5sCikBkztlyQGAgqoASwlgtUqnZAW7UXZwfYxg== X-Received: by 2002:a1c:1a4d:: with SMTP id a74mr15671407wma.50.1553621551169; Tue, 26 Mar 2019 10:32:31 -0700 (PDT) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id 4sm2534541wmg.12.2019.03.26.10.32.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 10:32:30 -0700 (PDT) From: Bartosz Golaszewski To: Rob Herring , Mark Rutland , Linus Walleij , Dmitry Torokhov , Jacek Anaszewski , Pavel Machek , Lee Jones , Sebastian Reichel , Liam Girdwood , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v7 07/11] power: supply: max77650: add support for battery charger Date: Tue, 26 Mar 2019 18:32:04 +0100 Message-Id: <20190326173208.30614-8-brgl@bgdev.pl> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190326173208.30614-1-brgl@bgdev.pl> References: <20190326173208.30614-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Bartosz Golaszewski Add basic support for the battery charger for max77650 PMIC. Signed-off-by: Bartosz Golaszewski --- drivers/power/supply/Kconfig | 7 + drivers/power/supply/Makefile | 1 + drivers/power/supply/max77650-charger.c | 367 ++++++++++++++++++++++++ 3 files changed, 375 insertions(+) create mode 100644 drivers/power/supply/max77650-charger.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index e901b9879e7e..0230c96fa94d 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -499,6 +499,13 @@ config CHARGER_DETECTOR_MAX14656 Revision 1.2 and can be found e.g. in Kindle 4/5th generation readers and certain LG devices. +config CHARGER_MAX77650 + tristate "Maxim MAX77650 battery charger driver" + depends on MFD_MAX77650 + help + Say Y to enable support for the battery charger control of MAX77650 + PMICs. + config CHARGER_MAX77693 tristate "Maxim MAX77693 battery charger driver" depends on MFD_MAX77693 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index b731c2a9b695..b73eb8c5c1a9 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o obj-$(CONFIG_CHARGER_LTC3651) += ltc3651-charger.o obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o obj-$(CONFIG_CHARGER_DETECTOR_MAX14656) += max14656_charger_detector.o +obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o diff --git a/drivers/power/supply/max77650-charger.c b/drivers/power/supply/max77650-charger.c new file mode 100644 index 000000000000..e7cca32944bd --- /dev/null +++ b/drivers/power/supply/max77650-charger.c @@ -0,0 +1,367 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 BayLibre SAS +// Author: Bartosz Golaszewski +// +// Battery charger driver for MAXIM 77650/77651 charger/power-supply. + +#include +#include +#include +#include +#include +#include +#include + +#define MAX77650_CHARGER_ENABLED BIT(0) +#define MAX77650_CHARGER_DISABLED 0x00 +#define MAX77650_CHARGER_CHG_EN_MASK BIT(0) + +#define MAX77650_CHG_DETAILS_MASK GENMASK(7, 4) +#define MAX77650_CHG_DETAILS_BITS(_reg) \ + (((_reg) & MAX77650_CHG_DETAILS_MASK) >> 4) + +/* Charger is OFF. */ +#define MAX77650_CHG_OFF 0x00 +/* Charger is in prequalification mode. */ +#define MAX77650_CHG_PREQ 0x01 +/* Charger is in fast-charge constant current mode. */ +#define MAX77650_CHG_ON_CURR 0x02 +/* Charger is in JEITA modified fast-charge constant-current mode. */ +#define MAX77650_CHG_ON_CURR_JEITA 0x03 +/* Charger is in fast-charge constant-voltage mode. */ +#define MAX77650_CHG_ON_VOLT 0x04 +/* Charger is in JEITA modified fast-charge constant-voltage mode. */ +#define MAX77650_CHG_ON_VOLT_JEITA 0x05 +/* Charger is in top-off mode. */ +#define MAX77650_CHG_ON_TOPOFF 0x06 +/* Charger is in JEITA modified top-off mode. */ +#define MAX77650_CHG_ON_TOPOFF_JEITA 0x07 +/* Charger is done. */ +#define MAX77650_CHG_DONE 0x08 +/* Charger is JEITA modified done. */ +#define MAX77650_CHG_DONE_JEITA 0x09 +/* Charger is suspended due to a prequalification timer fault. */ +#define MAX77650_CHG_SUSP_PREQ_TIM_FAULT 0x0a +/* Charger is suspended due to a fast-charge timer fault. */ +#define MAX77650_CHG_SUSP_FAST_CHG_TIM_FAULT 0x0b +/* Charger is suspended due to a battery temperature fault. */ +#define MAX77650_CHG_SUSP_BATT_TEMP_FAULT 0x0c + +#define MAX77650_CHGIN_DETAILS_MASK GENMASK(3, 2) +#define MAX77650_CHGIN_DETAILS_BITS(_reg) \ + (((_reg) & MAX77650_CHGIN_DETAILS_MASK) >> 2) + +#define MAX77650_CHGIN_UNDERVOLTAGE_LOCKOUT 0x00 +#define MAX77650_CHGIN_OVERVOLTAGE_LOCKOUT 0x01 +#define MAX77650_CHGIN_OKAY 0x11 + +#define MAX77650_CHARGER_CHG_MASK BIT(1) +#define MAX77650_CHARGER_CHG_CHARGING(_reg) \ + (((_reg) & MAX77650_CHARGER_CHG_MASK) > 1) + +#define MAX77650_CHARGER_VCHGIN_MIN_MASK 0xc0 +#define MAX77650_CHARGER_VCHGIN_MIN_SHIFT(_val) ((_val) << 5) + +#define MAX77650_CHARGER_ICHGIN_LIM_MASK 0x1c +#define MAX77650_CHARGER_ICHGIN_LIM_SHIFT(_val) ((_val) << 2) + +struct max77650_charger_data { + struct regmap *map; + struct device *dev; +}; + +static enum power_supply_property max77650_charger_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_CHARGE_TYPE +}; + +static const unsigned int max77650_charger_vchgin_min_table[] = { + 4000000, 4100000, 4200000, 4300000, 4400000, 4500000, 4600000, 4700000 +}; + +static const unsigned int max77650_charger_ichgin_lim_table[] = { + 95000, 190000, 285000, 380000, 475000 +}; + +static int max77650_charger_set_vchgin_min(struct max77650_charger_data *chg, + unsigned int val) +{ + int i, rv; + + for (i = 0; i < ARRAY_SIZE(max77650_charger_vchgin_min_table); i++) { + if (val == max77650_charger_vchgin_min_table[i]) { + rv = regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_VCHGIN_MIN_MASK, + MAX77650_CHARGER_VCHGIN_MIN_SHIFT(i)); + if (rv) + return rv; + + return 0; + } + } + + return -EINVAL; +} + +static int max77650_charger_set_ichgin_lim(struct max77650_charger_data *chg, + unsigned int val) +{ + int i, rv; + + for (i = 0; i < ARRAY_SIZE(max77650_charger_ichgin_lim_table); i++) { + if (val == max77650_charger_ichgin_lim_table[i]) { + rv = regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_ICHGIN_LIM_MASK, + MAX77650_CHARGER_ICHGIN_LIM_SHIFT(i)); + if (rv) + return rv; + + return 0; + } + } + + return -EINVAL; +} + +static int max77650_charger_enable(struct max77650_charger_data *chg) +{ + int rv; + + rv = regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_CHG_EN_MASK, + MAX77650_CHARGER_ENABLED); + if (rv) + dev_err(chg->dev, "unable to enable the charger: %d\n", rv); + + return rv; +} + +static int max77650_charger_disable(struct max77650_charger_data *chg) +{ + int rv; + + rv = regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_CHG_EN_MASK, + MAX77650_CHARGER_DISABLED); + if (rv) + dev_err(chg->dev, "unable to disable the charger: %d\n", rv); + + return rv; +} + +static irqreturn_t max77650_charger_check_status(int irq, void *data) +{ + struct max77650_charger_data *chg = data; + int rv, reg; + + rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®); + if (rv) { + dev_err(chg->dev, + "unable to read the charger status: %d\n", rv); + return IRQ_HANDLED; + } + + switch (MAX77650_CHGIN_DETAILS_BITS(reg)) { + case MAX77650_CHGIN_UNDERVOLTAGE_LOCKOUT: + dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n"); + max77650_charger_disable(chg); + break; + case MAX77650_CHGIN_OVERVOLTAGE_LOCKOUT: + dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n"); + max77650_charger_disable(chg); + break; + case MAX77650_CHGIN_OKAY: + max77650_charger_enable(chg); + break; + default: + /* May be 0x10 - debouncing */ + break; + } + + return IRQ_HANDLED; +} + +static int max77650_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct max77650_charger_data *chg = power_supply_get_drvdata(psy); + int rv, reg; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®); + if (rv) + return rv; + + if (MAX77650_CHARGER_CHG_CHARGING(reg)) { + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + } + + switch (MAX77650_CHG_DETAILS_BITS(reg)) { + case MAX77650_CHG_OFF: + case MAX77650_CHG_SUSP_PREQ_TIM_FAULT: + case MAX77650_CHG_SUSP_FAST_CHG_TIM_FAULT: + case MAX77650_CHG_SUSP_BATT_TEMP_FAULT: + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case MAX77650_CHG_PREQ: + case MAX77650_CHG_ON_CURR: + case MAX77650_CHG_ON_CURR_JEITA: + case MAX77650_CHG_ON_VOLT: + case MAX77650_CHG_ON_VOLT_JEITA: + case MAX77650_CHG_ON_TOPOFF: + case MAX77650_CHG_ON_TOPOFF_JEITA: + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + case MAX77650_CHG_DONE: + val->intval = POWER_SUPPLY_STATUS_FULL; + break; + default: + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + } + break; + case POWER_SUPPLY_PROP_ONLINE: + rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®); + if (rv) + return rv; + + val->intval = MAX77650_CHARGER_CHG_CHARGING(reg); + break; + case POWER_SUPPLY_PROP_CHARGE_TYPE: + rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, ®); + if (rv) + return rv; + + if (!MAX77650_CHARGER_CHG_CHARGING(reg)) { + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + } + + switch (MAX77650_CHG_DETAILS_BITS(reg)) { + case MAX77650_CHG_PREQ: + case MAX77650_CHG_ON_CURR: + case MAX77650_CHG_ON_CURR_JEITA: + case MAX77650_CHG_ON_VOLT: + case MAX77650_CHG_ON_VOLT_JEITA: + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case MAX77650_CHG_ON_TOPOFF: + case MAX77650_CHG_ON_TOPOFF_JEITA: + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + default: + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + } + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct power_supply_desc max77650_battery_desc = { + .name = "max77650", + .type = POWER_SUPPLY_TYPE_USB, + .get_property = max77650_charger_get_property, + .properties = max77650_charger_properties, + .num_properties = ARRAY_SIZE(max77650_charger_properties), +}; + +static int max77650_charger_probe(struct platform_device *pdev) +{ + struct power_supply_config pscfg = {}; + struct max77650_charger_data *chg; + struct power_supply *battery; + struct device *dev, *parent; + int rv, chg_irq, chgin_irq; + unsigned int prop; + + dev = &pdev->dev; + parent = dev->parent; + + chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL); + if (!chg) + return -ENOMEM; + + platform_set_drvdata(pdev, chg); + + chg->map = dev_get_regmap(parent, NULL); + if (!chg->map) + return -ENODEV; + + chg->dev = dev; + + pscfg.of_node = dev->of_node; + pscfg.drv_data = chg; + + chg_irq = platform_get_irq_byname(pdev, "CHG"); + if (chg_irq < 0) + return chg_irq; + + chgin_irq = platform_get_irq_byname(pdev, "CHGIN"); + if (chgin_irq < 0) + return chgin_irq; + + rv = devm_request_any_context_irq(dev, chg_irq, + max77650_charger_check_status, + IRQF_ONESHOT, "chg", chg); + if (rv < 0) + return rv; + + rv = devm_request_any_context_irq(dev, chgin_irq, + max77650_charger_check_status, + IRQF_ONESHOT, "chgin", chg); + if (rv < 0) + return rv; + + battery = devm_power_supply_register(dev, + &max77650_battery_desc, &pscfg); + if (IS_ERR(battery)) + return PTR_ERR(battery); + + rv = of_property_read_u32(dev->of_node, "min-microvolt", &prop); + if (rv == 0) { + rv = max77650_charger_set_vchgin_min(chg, prop); + if (rv) + return rv; + } + + rv = of_property_read_u32(dev->of_node, + "current-limit-microamp", &prop); + if (rv == 0) { + rv = max77650_charger_set_ichgin_lim(chg, prop); + if (rv) + return rv; + } + + return max77650_charger_enable(chg); +} + +static int max77650_charger_remove(struct platform_device *pdev) +{ + struct max77650_charger_data *chg = platform_get_drvdata(pdev); + + return max77650_charger_disable(chg); +} + +static struct platform_driver max77650_charger_driver = { + .driver = { + .name = "max77650-charger", + }, + .probe = max77650_charger_probe, + .remove = max77650_charger_remove, +}; +module_platform_driver(max77650_charger_driver); + +MODULE_DESCRIPTION("MAXIM 77650/77651 charger driver"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL v2");