From patchwork Tue Feb 5 09:12:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 10797141 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 32AE6922 for ; Tue, 5 Feb 2019 09:12:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 207C32ABA2 for ; Tue, 5 Feb 2019 09:12:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 13F182B7E1; Tue, 5 Feb 2019 09:12:57 +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 3A8712ABA2 for ; Tue, 5 Feb 2019 09:12:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728785AbfBEJMz (ORCPT ); Tue, 5 Feb 2019 04:12:55 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:52994 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728714AbfBEJMz (ORCPT ); Tue, 5 Feb 2019 04:12:55 -0500 Received: by mail-wm1-f65.google.com with SMTP id m1so2721164wml.2 for ; Tue, 05 Feb 2019 01:12:52 -0800 (PST) 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=zJ7jIqmoMWUUK1NaSoVKgQd76oSC1SEcArQ5JPH6c9A=; b=p207IKLKUsTpzx1yXPbxcXK7VYHIIZs3laxcJwEHcTF4SjFNoCmX+U8G4+w7ckLMJZ EaG7QyEY+EjWQYkNsS02okNFcnk5b38v+9kAT3R6D1mXUlUmLyN48OW1glkaIlgNa+sr aeOMOROCsSuo6GGkYtUPAOKyJCQIa0NQ4ThMbFgSG88SQebijdJZ0IYQxRba0qK3sMwW 1qklR9kew8T03VltcmjMr8n9yW6L1tEHBBR67CHOpwThYaP7wh/c9GPDYZF6G0xhRNfT UKW1LB6kyj/qvAL9arfGNrd6BEqM5ZvjM4wfkU7hka8pB0c4MgPMAqqwIwMm665VfrQe SN4w== 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=zJ7jIqmoMWUUK1NaSoVKgQd76oSC1SEcArQ5JPH6c9A=; b=FHo/hnLyEikH2IUtP1NupjhsbG0oiyp+892eRgbvWlVtGq4uCj9eyOnmLkeuHgIum3 aTmjGlZWwyRFnyRu+bXjQqmhDKrOsWTHJr19aLNZLVCdaS3eOjT4yqEdkDUCrhRLmfFF d7Kl1hL2y2RQhW2gEIvYmin3ez24jgje8t4nLbvoTcNqqLeeSHLp9UQELqFN2qp3KTyH w4a0gGhmlh10OAz06+8JbG3aTEn7rpvPYG8V8VE5XAUWIzCib8sW4/npSxW3ARJji5br 59h7tNJaVn5cQWbdgWEWscxT0WRbbmYKdC+xMYWR/gmVP2/pemjjJNIWriOnCL1fKoEN Ukwg== X-Gm-Message-State: AHQUAuZXzyLXBwerIUAqFImXcCmC80OMwbNnN3oOaMoIy8kTbj/RZqwU 0LWI7KJEVVFz1YO0ZBmRaL+nwQ== X-Google-Smtp-Source: AHgI3IbA28nZQV6MlQaCqgTH84uXkm2+GruRAPrkNzRGXlhJyVutI4eR74RSV7x4pKepKuiNvUFkJQ== X-Received: by 2002:a1c:b456:: with SMTP id d83mr2918607wmf.115.1549357972197; Tue, 05 Feb 2019 01:12:52 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id s5sm10433657wmh.37.2019.02.05.01.12.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Feb 2019 01:12:51 -0800 (PST) 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 v4 06/10] power: supply: max77650: add support for battery charger Date: Tue, 5 Feb 2019 10:12:33 +0100 Message-Id: <20190205091237.6448-7-brgl@bgdev.pl> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190205091237.6448-1-brgl@bgdev.pl> References: <20190205091237.6448-1-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 | 355 ++++++++++++++++++++++++ 3 files changed, 363 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..7055c9b5ee24 --- /dev/null +++ b/drivers/power/supply/max77650-charger.c @@ -0,0 +1,355 @@ +// 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_CHARGER_CHG_DTLS_MASK GENMASK(7, 4) +#define MAX77650_CHARGER_CHG_DTLS_BITS(_reg) \ + (((_reg) & MAX77650_CHARGER_CHG_DTLS_MASK) >> 4) + +#define MAX77650_CHARGER_CHG_OFF 0x00 +#define MAX77650_CHARGER_CHG_PREQ 0x01 +#define MAX77650_CHARGER_CHG_ON_CURR 0x02 +#define MAX77650_CHARGER_CHG_ON_JCURR 0x03 +#define MAX77650_CHARGER_CHG_ON_VOLT 0x04 +#define MAX77650_CHARGER_CHG_ON_JVOLT 0x05 +#define MAX77650_CHARGER_CHG_ON_TOPOFF 0x06 +#define MAX77650_CHARGER_CHG_ON_JTOPOFF 0x07 +#define MAX77650_CHARGER_CHG_DONE 0x08 +#define MAX77650_CHARGER_CHG_JDONE 0x09 +#define MAX77650_CHARGER_CHG_SUSP_PF 0x0a +#define MAX77650_CHARGER_CHG_SUSP_FCF 0x0b +#define MAX77650_CHARGER_CHG_SUSP_BTF 0x0c + +#define MAX77650_CHARGER_CHGIN_DTLS_MASK GENMASK(3, 2) +#define MAX77650_CHARGER_CHGIN_DTLS_BITS(_reg) \ + (((_reg) & MAX77650_CHARGER_CHGIN_DTLS_MASK) >> 2) + +#define MAX77650_CHARGER_CHGIN_UVL 0x00 +#define MAX77650_CHARGER_CHGIN_OVL 0x01 +#define MAX77650_CHARGER_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 void 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); +} + +static void 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); +} + +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_CHARGER_CHGIN_DTLS_BITS(reg)) { + case MAX77650_CHARGER_CHGIN_UVL: + dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n"); + max77650_charger_disable(chg); + break; + case MAX77650_CHARGER_CHGIN_OVL: + dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n"); + max77650_charger_disable(chg); + break; + case MAX77650_CHARGER_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_CHARGER_CHG_DTLS_BITS(reg)) { + case MAX77650_CHARGER_CHG_OFF: + case MAX77650_CHARGER_CHG_SUSP_PF: + case MAX77650_CHARGER_CHG_SUSP_FCF: + case MAX77650_CHARGER_CHG_SUSP_BTF: + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case MAX77650_CHARGER_CHG_PREQ: + case MAX77650_CHARGER_CHG_ON_CURR: + case MAX77650_CHARGER_CHG_ON_JCURR: + case MAX77650_CHARGER_CHG_ON_VOLT: + case MAX77650_CHARGER_CHG_ON_JVOLT: + case MAX77650_CHARGER_CHG_ON_TOPOFF: + case MAX77650_CHARGER_CHG_ON_JTOPOFF: + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + case MAX77650_CHARGER_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_CHARGER_CHG_DTLS_BITS(reg)) { + case MAX77650_CHARGER_CHG_PREQ: + case MAX77650_CHARGER_CHG_ON_CURR: + case MAX77650_CHARGER_CHG_ON_JCURR: + case MAX77650_CHARGER_CHG_ON_VOLT: + case MAX77650_CHARGER_CHG_ON_JVOLT: + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case MAX77650_CHARGER_CHG_ON_TOPOFF: + case MAX77650_CHARGER_CHG_ON_JTOPOFF: + 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, "maxim,vchgin-min", &prop); + if (rv == 0) { + rv = max77650_charger_set_vchgin_min(chg, prop); + if (rv) + return rv; + } + + rv = of_property_read_u32(dev->of_node, "maxim,ichgin-lim", &prop); + if (rv == 0) { + rv = max77650_charger_set_ichgin_lim(chg, prop); + if (rv) + return rv; + } + + return regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_CHG_EN_MASK, + MAX77650_CHARGER_ENABLED); +} + +static int max77650_charger_remove(struct platform_device *pdev) +{ + struct max77650_charger_data *chg = platform_get_drvdata(pdev); + + return regmap_update_bits(chg->map, + MAX77650_REG_CNFG_CHG_B, + MAX77650_CHARGER_CHG_EN_MASK, + MAX77650_CHARGER_DISABLED); +} + +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");