From patchwork Wed Apr 15 16:20:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravanan Sekar X-Patchwork-Id: 201975 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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT 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 45021C38A2C for ; Wed, 15 Apr 2020 16:21:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1FB25206F9 for ; Wed, 15 Apr 2020 16:21:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="q6p2YbqY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1415631AbgDOQVV (ORCPT ); Wed, 15 Apr 2020 12:21:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1415565AbgDOQUo (ORCPT ); Wed, 15 Apr 2020 12:20:44 -0400 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA974C061A10; Wed, 15 Apr 2020 09:20:43 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id x25so251252wmc.0; Wed, 15 Apr 2020 09:20:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=BO8j8+pI9zWfHd4m+N2P9+Cu+wuRfUjALFzaXkqSsKs=; b=q6p2YbqYbQMkHUgyUvjpknjKTMpCY2jujfx6FpyXiGjFACfVnj2Ol2m8yEmH2nTnBl s+YQHv05XYKCwJ1WfDXT9zY54M3PV2xRV/MAffArn30E4hPLg4efeE7jSzuN6gKZq7Dz qlGmDfkyJY11N8ST//tnHlPhMIHlM++IJrifxB9Mef79bE4Ul9QRytutMRwBKY2XRnnJ uORRozaBroIQX97SgKmy56JVpDXoBF5D07MZqmteM1EVIjxFs6JGxfZQ7ZLqRkRFloDX KMAqOGL6HRW1nhhal7DdZP8bgAveAnAbOG11IWfyTKMj60TwC7/nD0RtWYJ0vXJ1cLt0 NzeQ== 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; bh=BO8j8+pI9zWfHd4m+N2P9+Cu+wuRfUjALFzaXkqSsKs=; b=kXp9UnQbMJ+fZLcpBp6ByB4+oUaZr8kghPEOzbFOdsu0cU4erhLWZwycsS3ZcVWcrW szluAM0IdiXHnhTpvLrGqpVvy3hxKqZQuTDJDU1PelGna3q4F/UFOQ1G/Y7PI/TV/jt/ UikhTWDa9Wbu2X9CDyYeTC+3lgZMm+CgMWfK91R0hEDINlUokDvgSmf6W29m3O22somj dL9aGIkmzCl4OWMfJfbgO6aoECFhBRiyrSAE00Yhjow2xMBEM21Pv3NrTecJFsA1dl/w 00JU8kxLvJKqEucDuGwgYEfo1NyKoLOXZ/zBt2yKkd+p93OsbVntYNk+nxTpVQ2gU67N V7bg== X-Gm-Message-State: AGi0Pua5svFCHCyRGScEp3hyD3ZPMqdgVbC58G7ulQyiQ9nFt53lANFo C/Jc6w0KAfnracgtORYoa90= X-Google-Smtp-Source: APiQypLNasA8jBXwmSrEJx28QI0nE+TRJg/jzd1A87XIQ85DBNH5sghalrQsFCDpHzKD9DAb32eN2w== X-Received: by 2002:a05:600c:2314:: with SMTP id 20mr27038wmo.118.1586967642632; Wed, 15 Apr 2020 09:20:42 -0700 (PDT) Received: from localhost.localdomain (p5B3F6CCC.dip0.t-ipconnect.de. [91.63.108.204]) by smtp.gmail.com with ESMTPSA id 17sm102526wmo.2.2020.04.15.09.20.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2020 09:20:42 -0700 (PDT) From: Saravanan Sekar To: lee.jones@linaro.org, andy.shevchenko@gmail.com, robh+dt@kernel.org, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, sre@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-pm@vger.kernel.org, Saravanan Sekar Subject: [PATCH v9 3/6] iio: adc: mp2629: Add support for mp2629 ADC driver Date: Wed, 15 Apr 2020 18:20:27 +0200 Message-Id: <20200415162030.16414-4-sravanhome@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200415162030.16414-1-sravanhome@gmail.com> References: <20200415162030.16414-1-sravanhome@gmail.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add support for 8-bit resolution ADC readings for input power supply and battery charging measurement. Provides voltage, current readings to mp2629 power supply driver. Signed-off-by: Saravanan Sekar --- drivers/iio/adc/Kconfig | 10 ++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/mp2629_adc.c | 208 +++++++++++++++++++++++++++++++++++ include/linux/mfd/mp2629.h | 9 ++ 4 files changed, 228 insertions(+) create mode 100644 drivers/iio/adc/mp2629_adc.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 82e33082958c..ef0c0cd31855 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -680,6 +680,16 @@ config MESON_SARADC To compile this driver as a module, choose M here: the module will be called meson_saradc. +config MP2629_ADC + tristate "Monolithic MP2629 ADC driver" + depends on MFD_MP2629 + help + Say yes to have support for battery charger IC MP2629 ADC device + accessed over I2C. + + This driver provides ADC conversion of system, input power supply + and battery voltage & current information. + config NAU7802 tristate "Nuvoton NAU7802 ADC driver" depends on I2C diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 919228900df9..f14416c245a6 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_MCP3911) += mcp3911.o obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o obj-$(CONFIG_MESON_SARADC) += meson_saradc.o +obj-$(CONFIG_MP2629_ADC) += mp2629_adc.o obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o obj-$(CONFIG_NAU7802) += nau7802.o obj-$(CONFIG_NPCM_ADC) += npcm_adc.o diff --git a/drivers/iio/adc/mp2629_adc.c b/drivers/iio/adc/mp2629_adc.c new file mode 100644 index 000000000000..faf389f32729 --- /dev/null +++ b/drivers/iio/adc/mp2629_adc.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * MP2629 Driver for ADC + * + * Copyright 2020 Monolithic Power Systems, Inc + * + * Author: Saravanan Sekar + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define MP2629_REG_ADC_CTRL 0x03 +#define MP2629_REG_BATT_VOLT 0x0e +#define MP2629_REG_SYSTEM_VOLT 0x0f +#define MP2629_REG_INPUT_VOLT 0x11 +#define MP2629_REG_BATT_CURRENT 0x12 +#define MP2629_REG_INPUT_CURRENT 0x13 + +#define MP2629_ADC_START BIT(7) +#define MP2629_ADC_CONTINUOUS BIT(6) + +#define MP2629_MAP(_mp, _mpc) IIO_MAP(#_mp, "mp2629_charger", "mp2629-"_mpc) + +#define MP2629_ADC_CHAN(_ch, _type) { \ + .type = _type, \ + .indexed = 1, \ + .datasheet_name = #_ch, \ + .channel = MP2629_ ## _ch, \ + .address = MP2629_REG_ ## _ch, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +} + +struct mp2629_adc { + struct regmap *regmap; + struct device *dev; +}; + +static struct iio_chan_spec mp2629_channels[] = { + MP2629_ADC_CHAN(BATT_VOLT, IIO_VOLTAGE), + MP2629_ADC_CHAN(SYSTEM_VOLT, IIO_VOLTAGE), + MP2629_ADC_CHAN(INPUT_VOLT, IIO_VOLTAGE), + MP2629_ADC_CHAN(BATT_CURRENT, IIO_CURRENT), + MP2629_ADC_CHAN(INPUT_CURRENT, IIO_CURRENT) +}; + +static struct iio_map mp2629_adc_maps[] = { + MP2629_MAP(BATT_VOLT, "batt-volt"), + MP2629_MAP(SYSTEM_VOLT, "system-volt"), + MP2629_MAP(INPUT_VOLT, "input-volt"), + MP2629_MAP(BATT_CURRENT, "batt-current"), + MP2629_MAP(INPUT_CURRENT, "input-current") +}; + +static int mp2629_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct mp2629_adc *info = iio_priv(indio_dev); + unsigned int rval; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = regmap_read(info->regmap, chan->address, &rval); + if (ret) + return ret; + + if (chan->address == MP2629_INPUT_VOLT) + rval &= GENMASK(6, 0); + *val = rval; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + switch (chan->channel) { + case MP2629_BATT_VOLT: + case MP2629_SYSTEM_VOLT: + *val = 20; + return IIO_VAL_INT; + + case MP2629_INPUT_VOLT: + *val = 60; + return IIO_VAL_INT; + + case MP2629_BATT_CURRENT: + *val = 175; + *val2 = 10; + return IIO_VAL_FRACTIONAL; + + case MP2629_INPUT_CURRENT: + *val = 133; + *val2 = 10; + return IIO_VAL_FRACTIONAL; + + default: + return -EINVAL; + } + + default: + return -EINVAL; + } +} + +static const struct iio_info mp2629_adc_info = { + .read_raw = &mp2629_read_raw, +}; + +static int mp2629_adc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mp2629_info *ddata = dev_get_drvdata(dev->parent); + struct mp2629_adc *info; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*info)); + if (!indio_dev) + return -ENOMEM; + + info = iio_priv(indio_dev); + info->regmap = ddata->regmap; + info->dev = dev; + platform_set_drvdata(pdev, indio_dev); + + ret = regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL, + MP2629_ADC_START | MP2629_ADC_CONTINUOUS, + MP2629_ADC_START | MP2629_ADC_CONTINUOUS); + if (ret) { + dev_err(dev, "adc enable fail: %d\n", ret); + return ret; + } + + ret = iio_map_array_register(indio_dev, mp2629_adc_maps); + if (ret) { + dev_err(dev, "IIO maps register fail: %d\n", ret); + goto fail_disable; + } + + indio_dev->name = "mp2629-adc"; + indio_dev->dev.parent = dev; + indio_dev->channels = mp2629_channels; + indio_dev->num_channels = ARRAY_SIZE(mp2629_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &mp2629_adc_info; + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(dev, "IIO device register fail: %d\n", ret); + goto fail_map_unregister; + } + + return 0; + +fail_map_unregister: + iio_map_array_unregister(indio_dev); + +fail_disable: + regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL, + MP2629_ADC_CONTINUOUS, 0); + regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL, + MP2629_ADC_START, 0); + + return ret; +} + +static int mp2629_adc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + struct mp2629_adc *info = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + iio_map_array_unregister(indio_dev); + + regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL, + MP2629_ADC_CONTINUOUS, 0); + regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL, + MP2629_ADC_START, 0); + + return 0; +} + +static const struct of_device_id mp2629_adc_of_match[] = { + { .compatible = "mps,mp2629_adc"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp2629_adc_of_match); + +static struct platform_driver mp2629_adc_driver = { + .driver = { + .name = "mp2629_adc", + .of_match_table = mp2629_adc_of_match, + }, + .probe = mp2629_adc_probe, + .remove = mp2629_adc_remove, +}; +module_platform_driver(mp2629_adc_driver); + +MODULE_AUTHOR("Saravanan Sekar "); +MODULE_DESCRIPTION("MP2629 ADC driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/mp2629.h b/include/linux/mfd/mp2629.h index 06985e41fc6f..83ebfab41691 100644 --- a/include/linux/mfd/mp2629.h +++ b/include/linux/mfd/mp2629.h @@ -16,4 +16,13 @@ struct mp2629_info { struct regmap *regmap; }; +enum mp2629_adc_chan { + MP2629_BATT_VOLT, + MP2629_SYSTEM_VOLT, + MP2629_INPUT_VOLT, + MP2629_BATT_CURRENT, + MP2629_INPUT_CURRENT, + MP2629_ADC_CHAN_END +}; + #endif From patchwork Wed Apr 15 16:20:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravanan Sekar X-Patchwork-Id: 201977 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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 657BCC38A2C for ; Wed, 15 Apr 2020 16:21:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4658B208E4 for ; 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[91.63.108.204]) by smtp.gmail.com with ESMTPSA id 17sm102526wmo.2.2020.04.15.09.20.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2020 09:20:44 -0700 (PDT) From: Saravanan Sekar To: lee.jones@linaro.org, andy.shevchenko@gmail.com, robh+dt@kernel.org, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, sre@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-pm@vger.kernel.org, Saravanan Sekar Subject: [PATCH v9 5/6] power: supply: mp2629: Add impedance compenstation config Date: Wed, 15 Apr 2020 18:20:29 +0200 Message-Id: <20200415162030.16414-6-sravanhome@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200415162030.16414-1-sravanhome@gmail.com> References: <20200415162030.16414-1-sravanhome@gmail.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Allows the user to compensate the intrinsic resistance of the battery to accelerate the charging cycle. Signed-off-by: Saravanan Sekar --- Documentation/ABI/testing/sysfs-class-power-mp2629 | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-power-mp2629 diff --git a/Documentation/ABI/testing/sysfs-class-power-mp2629 b/Documentation/ABI/testing/sysfs-class-power-mp2629 new file mode 100644 index 000000000000..7b7c0e7a7c45 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-power-mp2629 @@ -0,0 +1,8 @@ +What: /sys/class/power_supply/mp2629_battery/batt_impedance_compen +Date: April 2020 +KernelVersion: 5.7 +Description: + Represents a battery impedance compenstation to accelerate charging. + + Access: Read, Write + Valid values: Represented in milli-ohms. Valid range is [0, 140]. 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[91.63.108.204]) by smtp.gmail.com with ESMTPSA id 17sm102526wmo.2.2020.04.15.09.20.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2020 09:20:45 -0700 (PDT) From: Saravanan Sekar To: lee.jones@linaro.org, andy.shevchenko@gmail.com, robh+dt@kernel.org, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, sre@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-pm@vger.kernel.org, Saravanan Sekar Subject: [PATCH v9 6/6] MAINTAINERS: Add entry for mp2629 Battery Charger driver Date: Wed, 15 Apr 2020 18:20:30 +0200 Message-Id: <20200415162030.16414-7-sravanhome@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200415162030.16414-1-sravanhome@gmail.com> References: <20200415162030.16414-1-sravanhome@gmail.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add MAINTAINERS entry for Monolithic Power Systems mp2629 Charger driver. Signed-off-by: Saravanan Sekar --- MAINTAINERS | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 32a95d162f06..0f82d5a7a614 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11358,10 +11358,15 @@ F: drivers/tty/mxser.* MONOLITHIC POWER SYSTEM PMIC DRIVER M: Saravanan Sekar S: Maintained +F: Documentation/devicetree/bindings/mfd/mps,mp2629.yaml F: Documentation/devicetree/bindings/regulator/mps,mp*.yaml +F: drivers/iio/adc/mp2629_adc.c +F: drivers/mfd/mp2629.c +F: drivers/power/supply/mp2629_charger.c F: drivers/regulator/mp5416.c F: drivers/regulator/mpq7920.c F: drivers/regulator/mpq7920.h +F: include/linux/mfd/mp2629.h MR800 AVERMEDIA USB FM RADIO DRIVER M: Alexey Klimov