From patchwork Mon Jun 17 18:45:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dimitri Fedrau X-Patchwork-Id: 13701269 Received: from mail-wr1-f42.google.com (mail-wr1-f42.google.com [209.85.221.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ABC5416FF50; Mon, 17 Jun 2024 18:45:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718649961; cv=none; b=kU6wUPhhcJ2KSypCSr5xKtLDX/9J1se9/S/zD+V5yj8dLl9z8T5hVh0i7TneOmjLu58AroRQrHdn3nStvqlTxqN4AGEGCN+C3LG4sWpZor+WwVGrl6ZLgdhJWDUiVvrkCtJn+AwdRc9NmrrOHF6AhuAvKNRRxdWMNsnAe7vikok= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718649961; c=relaxed/simple; bh=ViIwbEpDuDeKjR6Uhuw79YaKWjv72bRo83JfpFXNpbk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LQ6Z0fJRa6eg5rhSHoGi3vnCVHiWMS1kQyjQ9J7V770F2uSQYLRQjah5BV7b3o8KytnKK8dhYP11cJrPcZWpl+xlrbC4dprVn4NwyGjpmltR3hcz9DLwnOGiO32a8XY928+5FRviI+OJKKLZqNIMY2yEE2J+a/mB2B2H/vub+1A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mgP2OO5W; arc=none smtp.client-ip=209.85.221.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mgP2OO5W" Received: by mail-wr1-f42.google.com with SMTP id ffacd0b85a97d-3609e730be5so159958f8f.1; Mon, 17 Jun 2024 11:45:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1718649958; x=1719254758; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=U7LGxavlodmRw1dUauljrcGcc+zn8iI3h6YX5bKli6Y=; b=mgP2OO5Wlw+oMKvAzylTHPgKhlBEQ4uHM5ZoO/pLI5kAgkrPirP6ybWVF8bakYAq/C EMFUXRJ3NvhNm4z6BwVvhstessPDw2JgeE8pt0s3doFQyi6aNdJRhu6g4TjAfM0qO7O1 XJTPVPaw73RXqY4IWsEPdSPKpE5sVx9ZZurVocnCmbUMRIFf5o4wyxL+SnK3MyQFadck KuFs9Z8zfZWdFAg6dwVlse+mFfgjYd0+JNL7di/VkxGO1fu+EpkL6KZmrTztKf5JFazn L3EYR9qEbU/N8Kj447fm6DDVrsYZi6CRw5iQCLi+cx0UJYGptitzyUIQEzB/bJ2kNnm4 7zxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718649958; x=1719254758; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=U7LGxavlodmRw1dUauljrcGcc+zn8iI3h6YX5bKli6Y=; b=gu+w1xcM++as64yDOrDjJ+xEOqYTlgRNpGyznJp5QmwIVryrW8HTHzlxTUrUKPr+rk wPMoiM8jY1iSYE6KrdojNbq1nB3s+OnPQIyEdOk1CwcbR0wNaUvfr5JWkGMYBlJzMqK5 ljWKgs6nH1t6eILZT5p6zgM7TeNA6XmVBPTY5xXBnz0KI6cL+L1+i6dLhA/hGVl1Mdlc WEoTLo7Hu6X0cA2QZfKePmxksd8bc2pB7P5gqI/uemoHpEcxCXdmUaNUktper1Uuyoou inxRKVCriWsvOi51tsGee8XMtCBQ41rOkFYskFD6g1teBrFmbsXCM8+BD4wijGCYvyK5 t7vw== X-Forwarded-Encrypted: i=1; AJvYcCVM2kC6Ka3ciNXVkkq/14k9DodIVrMN2MhJLLiuKSWfd3c/3S9XJUKfb4sA+WtziHGCsHV9U8pKaA4hk/dZfSlFLfSrfnZ3pY8/suE30tYjMF7EE3XEi8EVAHj3o3pfUnikfO2Mw8wOUcJNz8IBdiKoXbQ9L0HQttT1bmHSiEzularQ X-Gm-Message-State: AOJu0YwwR7pvgRMtaRwfatKCqlQ32KbiVFzH+yUexqkLKJp+9KHlo5po tx396kkGlSVZg+AUEEen7L+cTcBAAPPAoX3AkwCYIzQ9odzjNRIr X-Google-Smtp-Source: AGHT+IFxexkW7sOgXfMrYhcWnVL44fxW2+pIQVsKJcsQKFKlXWN7uDX/Eu4PcnGEt7azqVWbLVNnkQ== X-Received: by 2002:a05:6000:1043:b0:360:7574:d6bc with SMTP id ffacd0b85a97d-3609ea6154cmr402603f8f.14.1718649957934; Mon, 17 Jun 2024 11:45:57 -0700 (PDT) Received: from debian.fritz.box ([93.184.186.109]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-360750f249csm12410327f8f.75.2024.06.17.11.45.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Jun 2024 11:45:57 -0700 (PDT) From: Dimitri Fedrau To: Cc: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Dimitri Fedrau Subject: [PATCH v4 1/2] dt-bindings: power: supply: add support for MAX17201/MAX17205 fuel gauge Date: Mon, 17 Jun 2024 20:45:03 +0200 Message-Id: <20240617184504.304211-2-dima.fedrau@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240617184504.304211-1-dima.fedrau@gmail.com> References: <20240617184504.304211-1-dima.fedrau@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Adding documentation for MAXIMs MAX17201/MAX17205 fuel gauge. Signed-off-by: Dimitri Fedrau --- .../bindings/power/supply/maxim,max1720x.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/maxim,max1720x.yaml diff --git a/Documentation/devicetree/bindings/power/supply/maxim,max1720x.yaml b/Documentation/devicetree/bindings/power/supply/maxim,max1720x.yaml new file mode 100644 index 000000000000..52467af5388a --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/maxim,max1720x.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/maxim,max1720x.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX1720x fuel gauge + +maintainers: + - Dimitri Fedrau + +allOf: + - $ref: power-supply.yaml# + +properties: + compatible: + enum: + - maxim,max17201 + - maxim,max17205 + + reg: + items: + - description: ModelGauge m5 registers + - description: Nonvolatile registers + + reg-names: + items: + - const: m5 + - const: nvmem + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - reg-names + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + fuel-gauge@36 { + compatible = "maxim,max17201"; + reg = <0x36>, <0xb>; + reg-names = "m5", "nvmem"; + interrupt-parent = <&gpio0>; + interrupts = <31 IRQ_TYPE_LEVEL_LOW>; + }; + }; From patchwork Mon Jun 17 18:45:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dimitri Fedrau X-Patchwork-Id: 13701270 Received: from mail-wr1-f54.google.com (mail-wr1-f54.google.com [209.85.221.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89794198826; Mon, 17 Jun 2024 18:46:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718649962; cv=none; b=lva47UtKOw/UTvs0w41QC0SP88uR5/qwkVwOLfpdgOn8hf1WlmHFpFp0coXI+DXxACSv5PIDBBoNZYSoOuH6ta+cX2QzSsmalHMl56J7WlgGHcsdxiFsVWKNgrRUMbGlp3+cXm6n0wfqn+13T0aptUi7IEdRGESnBt+lgZEn2HY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718649962; c=relaxed/simple; bh=WGbF91kl7JAr0HiUmt2dwh5lFk3koIxWmYauYkyvDcM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LaL/4IdO4IniKDYXDY9YhAiO8ljJMqHN/KuD3WHxNnp64ufY8mrEwUkmQTie4s3ekNQY3YPuYIdfhrpW1G/qZXM+2mlwGOKz7H5tQGWIRsJ9w4V09+OjrpMKPVYhyhI79HIYuGe2v7HMUQvKBhfStPumqIRtSXpWHRWUHHKFFKA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jzyod0SR; arc=none smtp.client-ip=209.85.221.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jzyod0SR" Received: by mail-wr1-f54.google.com with SMTP id ffacd0b85a97d-35f2c9e23d3so3783443f8f.0; Mon, 17 Jun 2024 11:46:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1718649959; x=1719254759; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qRf6vjAglp1xhamBOyz4NxQ2EaCuNYCLhPu1bSuxxos=; b=jzyod0SRBaTzaaDGozkXezeXMT++8jzJS7LtEHvClMZbIOQyry/gqz2gNyJ/HBfdZT u0dMYHTtKmBqyZT8zDcDLV7SjeZry39fSyDSjBzU7D7/xNodIZEtOXpaxumg02WvrUrK 7Va1ad4Eun3FrdajwqSZsy7clrfZ/soESbeyDb4IAdqlx3wKcuECdDN6LVwi5O73blTG uxHQowLjBAmHNlAVumy0Ws9X+PCi6ytLRQ0vZzXgAk/EBNR6QPobCdgMiE+V1VOiqhPc ogk6dIlOqVaeu8Mw4s9SH6fWdswJViKd6hNGCMHnP5wVW3TU05di1cQ15/m55FgQYDgF s6rQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718649959; x=1719254759; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qRf6vjAglp1xhamBOyz4NxQ2EaCuNYCLhPu1bSuxxos=; b=YZKXbKduwTi2/X/FtzPdjQCrc5t4GdKQu5+yjY3V9Khxd4Hdn43BxRLYY/E1I56+82 zxLRWJKMmKwpl3xUlj+RfvOWNEJm5+JxODF8ZUaYewjzh3MdUdFQFQ5uz+oeZMGum2qV rohFK96Gq6t7kSTzI3dNHgWvx75gASRv+gduQFdOcOcQHVbyrcp2sT6AKuStZ7YNvbt2 IeYHFKQU7yUcKFAKVw4FFJWe/ATGxYS/8WmlOp/R9OGWSPHlqcyxiu6wcByCnzd38d5S GXsWBIgr9LHNohPIz6mXJFeAabkyhP6PmJgXv7v7yDL3Fxgf9ZyGEFfCegvUDFP2TFQR 5k5g== X-Forwarded-Encrypted: i=1; AJvYcCV/olk9Gmxbxui8VEK5YE25tL9gYeBkOUH2xPsu4lCeBb+7rrN1xWhE4dSVWbZNS9S4NaHc9qpdVCFZF+i0bHNoi9wUQreYmwvJsPiwje5cQ2Wa7658KUMQzpUoUFbnOd6mCk781NHcD/5Y/Ki4dNJ55Bj0T3Wleev1JMc+jh8xK7UZ X-Gm-Message-State: AOJu0YzOf64UPZS5KapoviG5KB0yOQE69EOAbiHNB/48kjMULChUcDvh iyrFfv2vnks51OdIp29tvsVVKirLWVJ18AlmcHtpZEVRrixHW7uh X-Google-Smtp-Source: AGHT+IGu949+P7qx4T+3zdjfOamelxJswLH+HTJ0Odtdt4CD8uIS5osibFYTmkuxDe/TLiVPr6PV7Q== X-Received: by 2002:a5d:494d:0:b0:35f:2e52:b514 with SMTP id ffacd0b85a97d-3609ea9fcc3mr409627f8f.22.1718649958806; Mon, 17 Jun 2024 11:45:58 -0700 (PDT) Received: from debian.fritz.box ([93.184.186.109]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-360750f249csm12410327f8f.75.2024.06.17.11.45.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Jun 2024 11:45:58 -0700 (PDT) From: Dimitri Fedrau To: Cc: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Dimitri Fedrau Subject: [PATCH v4 2/2] power: supply: add support for MAX1720x standalone fuel gauge Date: Mon, 17 Jun 2024 20:45:04 +0200 Message-Id: <20240617184504.304211-3-dima.fedrau@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240617184504.304211-1-dima.fedrau@gmail.com> References: <20240617184504.304211-1-dima.fedrau@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The MAX17201 monitors a single cell pack. The MAX17205 monitors and balances a 2S or 3S pack or monitors a multiple-series cell pack. Both devices use a I2C interface. Signed-off-by: Dimitri Fedrau --- drivers/power/supply/Kconfig | 12 + drivers/power/supply/Makefile | 1 + drivers/power/supply/max1720x_battery.c | 363 ++++++++++++++++++++++++ 3 files changed, 376 insertions(+) create mode 100644 drivers/power/supply/max1720x_battery.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 3e31375491d5..9294520b64a3 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -402,6 +402,18 @@ config BATTERY_MAX17042 Driver can be build as a module (max17042_battery). +config BATTERY_MAX1720X + tristate "Maxim MAX17201/MAX17205 Fuel Gauge" + depends on I2C + select REGMAP_I2C + help + MAX1720x is a family of fuel-gauge systems for lithium-ion (Li+) + batteries in handheld and portable equipment. MAX17201 are + configured to operate with a single lithium cell, the MAX17205 + can operate with multiple cells. + + Say Y to include support for the MAX17201/MAX17205 Fuel Gauges. + config BATTERY_MAX1721X tristate "MAX17211/MAX17215 standalone gas-gauge" depends on W1 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 58b567278034..6f02d0248826 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_CHARGER_DA9150) += da9150-charger.o obj-$(CONFIG_BATTERY_DA9150) += da9150-fg.o obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o +obj-$(CONFIG_BATTERY_MAX1720X) += max1720x_battery.o obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o obj-$(CONFIG_CHARGER_RT5033) += rt5033_charger.o diff --git a/drivers/power/supply/max1720x_battery.c b/drivers/power/supply/max1720x_battery.c new file mode 100644 index 000000000000..cd0a35fb4fef --- /dev/null +++ b/drivers/power/supply/max1720x_battery.c @@ -0,0 +1,363 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Fuel gauge driver for Maxim 17201/17205 + * + * based on max1721x_battery.c + * + * Copyright (C) 2024 Liebherr-Electronics and Drives GmbH + */ + +#include +#include +#include +#include +#include + +#include + +/* Nonvolatile registers */ +#define MAX1720_NRSENSE 0xCF /* RSense in 10^-5 Ohm */ + +/* ModelGauge m5 */ +#define MAX172XX_STATUS 0x00 /* Status */ +#define MAX172XX_STATUS_BAT_ABSENT BIT(3) /* Battery absent */ +#define MAX172XX_REPCAP 0x05 /* Average capacity */ +#define MAX172XX_REPSOC 0x06 /* Percentage of charge */ +#define MAX172XX_TEMP 0x08 /* Temperature */ +#define MAX172XX_CURRENT 0x0A /* Actual current */ +#define MAX172XX_AVG_CURRENT 0x0B /* Average current */ +#define MAX172XX_TTE 0x11 /* Time to empty */ +#define MAX172XX_AVG_TA 0x16 /* Average temperature */ +#define MAX172XX_CYCLES 0x17 +#define MAX172XX_DESIGN_CAP 0x18 /* Design capacity */ +#define MAX172XX_AVG_VCELL 0x19 +#define MAX172XX_TTF 0x20 /* Time to full */ +#define MAX172XX_DEV_NAME 0x21 /* Device name */ +#define MAX172XX_DEV_NAME_TYPE_MASK GENMASK(3, 0) +#define MAX172XX_DEV_NAME_TYPE_MAX17201 BIT(0) +#define MAX172XX_DEV_NAME_TYPE_MAX17205 (BIT(0) | BIT(2)) +#define MAX172XX_QR_TABLE10 0x22 +#define MAX172XX_BATT 0xDA /* Battery voltage */ +#define MAX172XX_ATAVCAP 0xDF + +static const char *const max1720x_manufacturer = "Maxim Integrated"; +static const char *const max17201_model = "MAX17201"; +static const char *const max17205_model = "MAX17205"; + +struct max1720x_device_info { + struct regmap *regmap; + int rsense; +}; + +/* + * Model Gauge M5 Algorithm output register + * Volatile data (must not be cached) + */ +static const struct regmap_range max1720x_volatile_allow[] = { + regmap_reg_range(MAX172XX_STATUS, MAX172XX_CYCLES), + regmap_reg_range(MAX172XX_AVG_VCELL, MAX172XX_TTF), + regmap_reg_range(MAX172XX_QR_TABLE10, MAX172XX_ATAVCAP), +}; + +static const struct regmap_range max1720x_readable_allow[] = { + regmap_reg_range(MAX172XX_STATUS, MAX172XX_ATAVCAP), +}; + +static const struct regmap_range max1720x_readable_deny[] = { + /* unused registers */ + regmap_reg_range(0x24, 0x26), + regmap_reg_range(0x30, 0x31), + regmap_reg_range(0x33, 0x34), + regmap_reg_range(0x37, 0x37), + regmap_reg_range(0x3B, 0x3C), + regmap_reg_range(0x40, 0x41), + regmap_reg_range(0x43, 0x44), + regmap_reg_range(0x47, 0x49), + regmap_reg_range(0x4B, 0x4C), + regmap_reg_range(0x4E, 0xAF), + regmap_reg_range(0xB1, 0xB3), + regmap_reg_range(0xB5, 0xB7), + regmap_reg_range(0xBF, 0xD0), + regmap_reg_range(0xDB, 0xDB), + regmap_reg_range(0xE0, 0xFF), +}; + +static const struct regmap_access_table max1720x_readable_regs = { + .yes_ranges = max1720x_readable_allow, + .n_yes_ranges = ARRAY_SIZE(max1720x_readable_allow), + .no_ranges = max1720x_readable_deny, + .n_no_ranges = ARRAY_SIZE(max1720x_readable_deny), +}; + +static const struct regmap_access_table max1720x_volatile_regs = { + .yes_ranges = max1720x_volatile_allow, + .n_yes_ranges = ARRAY_SIZE(max1720x_volatile_allow), + .no_ranges = max1720x_readable_deny, + .n_no_ranges = ARRAY_SIZE(max1720x_readable_deny), +}; + +static const struct regmap_config max1720x_regmap_cfg = { + .reg_bits = 8, + .val_bits = 16, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .rd_table = &max1720x_readable_regs, + .volatile_table = &max1720x_volatile_regs, + .cache_type = REGCACHE_RBTREE, +}; + +static const enum power_supply_property max1720x_battery_props[] = { + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CHARGE_AVG, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, + POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +/* Convert regs value to power_supply units */ + +static int max172xx_time_to_ps(unsigned int reg) +{ + return reg * 5625 / 1000; /* in sec. */ +} + +static int max172xx_percent_to_ps(unsigned int reg) +{ + return reg / 256; /* in percent from 0 to 100 */ +} + +static int max172xx_voltage_to_ps(unsigned int reg) +{ + return reg * 1250; /* in uV */ +} + +static int max172xx_capacity_to_ps(unsigned int reg) +{ + return reg * 500; /* in uAh */ +} + +/* + * Current and temperature is signed values, so unsigned regs + * value must be converted to signed type + */ + +static int max172xx_temperature_to_ps(unsigned int reg) +{ + int val = (int16_t)reg; + + return val * 10 / 256; /* in tenths of deg. C */ +} + +/* + * Calculating current registers resolution: + * + * RSense stored in 10^-5 Ohm, so mesaurment voltage must be + * in 10^-11 Volts for get current in uA. + * 16 bit current reg fullscale +/-51.2mV is 102400 uV. + * So: 102400 / 65535 * 10^5 = 156252 + */ +static int max172xx_current_to_voltage(unsigned int reg) +{ + int val = (int16_t)reg; + + return val * 156252; +} + +static int max1720x_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct max1720x_device_info *info = power_supply_get_drvdata(psy); + unsigned int reg_val; + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_PRESENT: + /* + * POWER_SUPPLY_PROP_PRESENT will always readable via + * sysfs interface. Value return 0 if battery not + * present or unaccesable via I2c. + */ + ret = regmap_read(info->regmap, MAX172XX_STATUS, ®_val); + if (ret < 0) { + val->intval = 0; + return 0; + } + + val->intval = !FIELD_GET(MAX172XX_STATUS_BAT_ABSENT, reg_val); + break; + case POWER_SUPPLY_PROP_CAPACITY: + ret = regmap_read(info->regmap, MAX172XX_REPSOC, ®_val); + val->intval = max172xx_percent_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = regmap_read(info->regmap, MAX172XX_BATT, ®_val); + val->intval = max172xx_voltage_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + ret = regmap_read(info->regmap, MAX172XX_DESIGN_CAP, ®_val); + val->intval = max172xx_capacity_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_CHARGE_AVG: + ret = regmap_read(info->regmap, MAX172XX_REPCAP, ®_val); + val->intval = max172xx_capacity_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: + ret = regmap_read(info->regmap, MAX172XX_TTE, ®_val); + val->intval = max172xx_time_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: + ret = regmap_read(info->regmap, MAX172XX_TTF, ®_val); + val->intval = max172xx_time_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_TEMP: + ret = regmap_read(info->regmap, MAX172XX_TEMP, ®_val); + val->intval = max172xx_temperature_to_ps(reg_val); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = regmap_read(info->regmap, MAX172XX_CURRENT, ®_val); + val->intval = max172xx_current_to_voltage(reg_val) / info->rsense; + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + ret = regmap_read(info->regmap, MAX172XX_AVG_CURRENT, ®_val); + val->intval = max172xx_current_to_voltage(reg_val) / info->rsense; + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + ret = regmap_read(info->regmap, MAX172XX_DEV_NAME, ®_val); + reg_val = FIELD_GET(MAX172XX_DEV_NAME_TYPE_MASK, reg_val); + if (reg_val == MAX172XX_DEV_NAME_TYPE_MAX17201) + val->strval = max17201_model; + else if (reg_val == MAX172XX_DEV_NAME_TYPE_MAX17205) + val->strval = max17205_model; + else + return -ENODEV; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = max1720x_manufacturer; + break; + default: + return -EINVAL; + } + + return ret; +} + +static int max1720x_read_word_data_nvmem(struct i2c_client *ancillary, u8 addr) +{ + u8 rx[2]; + struct i2c_msg msgs[] = { + { + .addr = ancillary->addr, + .flags = 0, + .len = 1, + .buf = &addr, + }, + { + .addr = ancillary->addr, + .flags = I2C_M_RD, + .len = 2, + .buf = &rx[0], + }, + }; + int ret; + + ret = i2c_transfer(ancillary->adapter, msgs, ARRAY_SIZE(msgs)); + if (ret != ARRAY_SIZE(msgs)) + return ret < 0 ? ret : -EIO; + + return get_unaligned_le16(&rx[0]); +} + +static int max1720x_probe_sense_resistor(struct i2c_client *client, + struct max1720x_device_info *info) +{ + struct device *dev = &client->dev; + struct i2c_client *ancillary; + int ret; + + ancillary = i2c_new_ancillary_device(client, "nvmem", 0xb); + if (IS_ERR(ancillary)) { + dev_err(dev, "Failed to initialize ancillary i2c device\n"); + return PTR_ERR(ancillary); + } + + ret = max1720x_read_word_data_nvmem(ancillary, MAX1720_NRSENSE); + i2c_unregister_device(ancillary); + if (ret < 0) + return ret; + + info->rsense = ret; + if (!info->rsense) { + dev_warn(dev, "RSense not calibrated, set 10 mOhms!\n"); + info->rsense = 1000; /* in regs in 10^-5 */ + } + + return 0; +} + +static const struct power_supply_desc max1720x_bat_desc = { + .name = "max1720x", + .no_thermal = true, + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = max1720x_battery_props, + .num_properties = ARRAY_SIZE(max1720x_battery_props), + .get_property = max1720x_battery_get_property, +}; + +static int max1720x_probe(struct i2c_client *client) +{ + struct power_supply_config psy_cfg = {}; + struct device *dev = &client->dev; + struct max1720x_device_info *info; + struct power_supply *bat; + int ret; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + psy_cfg.drv_data = info; + + info->regmap = devm_regmap_init_i2c(client, &max1720x_regmap_cfg); + if (IS_ERR(info->regmap)) + return dev_err_probe(dev, PTR_ERR(info->regmap), + "regmap initialization failed\n"); + + ret = max1720x_probe_sense_resistor(client, info); + if (ret) + return dev_err_probe(dev, ret, + "Failed to read sense resistor value\n"); + + bat = devm_power_supply_register(dev, &max1720x_bat_desc, &psy_cfg); + if (IS_ERR(bat)) + return dev_err_probe(dev, PTR_ERR(bat), + "Failed to register power supply\n"); + + return 0; +} + +static const struct of_device_id max1720x_of_match[] = { + { .compatible = "maxim,max17201" }, + { .compatible = "maxim,max17205" }, + {} +}; +MODULE_DEVICE_TABLE(of, max1720x_of_match); + +static struct i2c_driver max1720x_i2c_driver = { + .driver = { + .name = "max1720x", + .of_match_table = max1720x_of_match, + }, + .probe = max1720x_probe, +}; +module_i2c_driver(max1720x_i2c_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dimitri Fedrau "); +MODULE_DESCRIPTION("Maxim MAX17201/MAX17205 Fuel Gauge IC driver");