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Tue, 12 Nov 2019 07:35:19 -0800 Received: from ben-Latitude-E6540.ad.analog.com (10.48.65.231) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Tue, 12 Nov 2019 10:35:26 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , , , , , , Michael Hennerich , Beniamin Bia Subject: [PATCH 1/3] iio: Add ADM1177 Hot Swap Controller and Digital Power Monitor driver Date: Tue, 12 Nov 2019 17:35:50 +0200 Message-ID: <20191112153552.27431-1-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.57;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(39860400002)(136003)(376002)(346002)(396003)(199004)(189003)(44832011)(486006)(2616005)(126002)(107886003)(2351001)(356004)(6666004)(966005)(47776003)(478600001)(8936002)(50226002)(246002)(6916009)(305945005)(50466002)(70206006)(70586007)(8676002)(476003)(48376002)(7636002)(51416003)(1076003)(36756003)(16586007)(7696005)(316002)(2906002)(6306002)(5660300002)(14444005)(106002)(4326008)(54906003)(336012)(7416002)(426003)(186003)(86362001)(26005);DIR:OUT;SFP:1101;SCL:1;SRVR:BN7PR03MB3618;H:nwd2mta2.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail11.analog.com;A:1;MX:1; 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Datasheet: Link: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1177.pdf Signed-off-by: Michael Hennerich Co-developed-by: Beniamin Bia Signed-off-by: Beniamin Bia --- drivers/iio/adc/Kconfig | 12 ++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/adm1177.c | 257 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+) create mode 100644 drivers/iio/adc/adm1177.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 9554890a3200..4db8c6dcb595 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -228,6 +228,18 @@ config ASPEED_ADC To compile this driver as a module, choose M here: the module will be called aspeed_adc. +config ADM1177 + tristate "Analog Devices ADM1177 Digital Power Monitor driver" + depends on I2C + help + Say yes here to build support for Analog Devices: + ADM1177 Hot Swap Controller and Digital Power Monitor + with Soft Start Pin. Provides direct access + via sysfs. + + To compile this driver as a module, choose M here: the + module will be called adm1177. + config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 5ecc481c2967..7899d6a158f3 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_AD7887) += ad7887.o obj-$(CONFIG_AD7949) += ad7949.o obj-$(CONFIG_AD799X) += ad799x.o obj-$(CONFIG_ASPEED_ADC) += aspeed_adc.o +obj-$(CONFIG_ADM1177) += adm1177.o obj-$(CONFIG_AT91_ADC) += at91_adc.o obj-$(CONFIG_AT91_SAMA5D2_ADC) += at91-sama5d2_adc.o obj-$(CONFIG_AXP20X_ADC) += axp20x_adc.o diff --git a/drivers/iio/adc/adm1177.c b/drivers/iio/adc/adm1177.c new file mode 100644 index 000000000000..daec34566a65 --- /dev/null +++ b/drivers/iio/adc/adm1177.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADM1177 Hot Swap Controller and Digital Power Monitor with Soft Start Pin + * + * Copyright 2015-2019 Analog Devices Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/* Command Byte Operations */ +#define ADM1177_CMD_V_CONT BIT(0) +#define ADM1177_CMD_V_ONCE BIT(1) +#define ADM1177_CMD_I_CONT BIT(2) +#define ADM1177_CMD_I_ONCE BIT(3) +#define ADM1177_CMD_VRANGE BIT(4) +#define ADM1177_CMD_STATUS_RD BIT(6) + +/* Extended Register */ +#define ADM1177_REG_ALERT_EN 1 +#define ADM1177_REG_ALERT_TH 2 +#define ADM1177_REG_CONTROL 3 + +/* ADM1177_REG_ALERT_EN */ +#define ADM1177_EN_ADC_OC1 BIT(0) +#define ADM1177_EN_ADC_OC4 BIT(1) +#define ADM1177_EN_HS_ALERT BIT(2) +#define ADM1177_EN_OFF_ALERT BIT(3) +#define ADM1177_CLEAR BIT(4) + +/* ADM1177_REG_CONTROL */ +#define ADM1177_SWOFF BIT(0) + +#define ADM1177_BITS 12 + +/** + * struct adm1177_state - driver instance specific data + * @client pointer to i2c client + * @reg regulator info for the the power supply of the device + * @command internal control register + * @r_sense_uohm current sense resistor value + * @alert_threshold_ua current limit for shutdown + * @vrange_high internal voltage divider + */ +struct adm1177_state { + struct i2c_client *client; + struct regulator *reg; + u8 command; + u32 r_sense_uohm; + u32 alert_threshold_ua; + bool vrange_high; +}; + +static int adm1177_read(struct adm1177_state *st, u8 num, u8 *data) +{ + struct i2c_client *client = st->client; + int ret = 0; + + ret = i2c_master_recv(client, data, num); + if (ret < 0) { + dev_err(&client->dev, "I2C read error\n"); + return ret; + } + + return 0; +} + +static int adm1177_write_cmd(struct adm1177_state *st, u8 cmd) +{ + st->command = cmd; + return i2c_smbus_write_byte(st->client, cmd); +} + +static int adm1177_write_reg(struct adm1177_state *st, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(st->client, reg, val); +} + +static int adm1177_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + struct adm1177_state *st = iio_priv(indio_dev); + u8 data[3]; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + adm1177_read(st, 3, data); + switch (chan->type) { + case IIO_VOLTAGE: + *val = (data[0] << 4) | (data[2] >> 4); + return IIO_VAL_INT; + case IIO_CURRENT: + *val = (data[1] << 4) | (data[2] & 0xF); + return IIO_VAL_INT; + default: + return -EINVAL; + } + + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VOLTAGE: + if (st->command & ADM1177_CMD_VRANGE) + *val = 6650; + else + *val = 26350; + + *val2 = ADM1177_BITS; + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_CURRENT: + *val = 105840 / st->r_sense_uohm; + + *val2 = ADM1177_BITS; + return IIO_VAL_FRACTIONAL_LOG2; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static const struct iio_chan_spec adm1177_channels[] = { + { + .type = IIO_VOLTAGE, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .indexed = 1, + .channel = 0, + }, + { + .type = IIO_CURRENT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .indexed = 1, + .channel = 0, + }, +}; + +static const struct iio_info adm1177_info = { + .read_raw = &adm1177_read_raw, +}; +static void adm1177_remove(void *data) +{ + struct adm1177_state *st = data; + + if (st->reg) + regulator_disable(st->reg); +} + +static int adm1177_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct device_node *np; + struct adm1177_state *st; + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + st->client = client; + + np = client->dev.of_node; + + st->reg = devm_regulator_get_optional(&client->dev, "vref"); + if (IS_ERR(st->reg)) { + if (PTR_ERR(st->reg) == EPROBE_DEFER) + return -EPROBE_DEFER; + + st->reg = NULL; + } else { + ret = regulator_enable(st->reg); + if (ret) + return ret; + ret = devm_add_action_or_reset(&client->dev, adm1177_remove, + st); + if (ret) + return ret; + } + + of_property_read_u32(np, "adi,r-sense-micro-ohms", &st->r_sense_uohm); + of_property_read_u32(np, "adi,shutdown-threshold-microamp", + &st->alert_threshold_ua); + st->vrange_high = of_property_read_bool(np, + "adi,vrange-high-enable"); + if (st->alert_threshold_ua) { + unsigned int val; + + val = (st->alert_threshold_ua * st->r_sense_uohm * 0xFF); + val /= 105840000U; + if (val > 0xFF) { + dev_err(&client->dev, + "Requested shutdown current %d uA above limit\n", + st->alert_threshold_ua); + + val = 0xFF; + } + adm1177_write_reg(st, ADM1177_REG_ALERT_TH, val); + } + + adm1177_write_cmd(st, ADM1177_CMD_V_CONT | + ADM1177_CMD_I_CONT | + (st->vrange_high ? 0 : ADM1177_CMD_VRANGE)); + + indio_dev->name = id->name; + indio_dev->channels = adm1177_channels; + indio_dev->num_channels = ARRAY_SIZE(adm1177_channels); + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &adm1177_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct i2c_device_id adm1177_ids[] = { + { "adm1177", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, adm1177_ids); + +static const struct of_device_id adm1177_dt_ids[] = { + { .compatible = "adi,adm1177" }, + {}, +}; +MODULE_DEVICE_TABLE(of, adm1177_dt_ids); + +static struct i2c_driver adm1177_driver = { + .driver = { + .name = "adm1177", + .of_match_table = adm1177_dt_ids, + }, + .probe = adm1177_probe, + .id_table = adm1177_ids, +}; +module_i2c_driver(adm1177_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices ADM1177 ADC driver"); +MODULE_LICENSE("GPL v2"); From patchwork Tue Nov 12 15:35:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11239689 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4B3714E5 for ; Tue, 12 Nov 2019 15:36:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABFBB21925 for ; Tue, 12 Nov 2019 15:36:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=analog.onmicrosoft.com header.i=@analog.onmicrosoft.com header.b="zV3Nm0B2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727357AbfKLPgN (ORCPT ); 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Received: from nwd2mta2.analog.com (137.71.25.57) by BL2NAM02FT039.mail.protection.outlook.com (10.152.77.152) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.20.2430.20 via Frontend Transport; Tue, 12 Nov 2019 15:35:38 +0000 Received: from NWD2HUBCAS7.ad.analog.com (nwd2hubcas7.ad.analog.com [10.64.69.107]) by nwd2mta2.analog.com (8.13.8/8.13.8) with ESMTP id xACFZTIX012368 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=OK); Tue, 12 Nov 2019 07:35:29 -0800 Received: from ben-Latitude-E6540.ad.analog.com (10.48.65.231) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Tue, 12 Nov 2019 10:35:37 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , , , , , , Beniamin Bia Subject: [PATCH 2/3] dt-binding: iio: Add documentation for ADM1177 Date: Tue, 12 Nov 2019 17:35:51 +0200 Message-ID: <20191112153552.27431-2-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191112153552.27431-1-beniamin.bia@analog.com> References: <20191112153552.27431-1-beniamin.bia@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.57;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(376002)(136003)(396003)(346002)(39860400002)(199004)(189003)(36756003)(2351001)(47776003)(2906002)(966005)(478600001)(50466002)(6666004)(356004)(246002)(6916009)(76176011)(4326008)(2616005)(476003)(486006)(426003)(44832011)(446003)(126002)(26005)(11346002)(51416003)(7696005)(107886003)(48376002)(186003)(336012)(7636002)(7416002)(305945005)(70586007)(70206006)(8936002)(1076003)(6306002)(8676002)(316002)(86362001)(50226002)(5660300002)(16586007)(106002)(54906003);DIR:OUT;SFP:1101;SCL:1;SRVR:DM6PR03MB3675;H:nwd2mta2.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail11.analog.com;A:1;MX:1; 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Signed-off-by: Beniamin Bia --- .../bindings/iio/adc/adi,adm1177.yaml | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,adm1177.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,adm1177.yaml b/Documentation/devicetree/bindings/iio/adc/adi,adm1177.yaml new file mode 100644 index 000000000000..69a0230e59f5 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,adm1177.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,adm1177.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices ADM1177 Hot Swap Controller and Digital Power Monitor + +maintainers: + - Michael Hennerich + - Beniamin Bia + +description: | + Analog Devices ADM1177 Hot Swap Controller and Digital Power Monitor + https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1177.pdf + +properties: + compatible: + enum: + - adi,adm1177 + + reg: + maxItems: 1 + + avcc-supply: + description: + Phandle to the Avcc power supply + + adi,r-sense-micro-ohms: + description: + The value of curent sense resistor in microohms. + + adi,shutdown-threshold-microamp: + description: + Specifies the current level at which an over current alert occurs. + maximum: 255 + + adi,vrange-high-enable: + description: + Specifies which internal voltage divider to be used. A 1 selects + a 7:2 voltage divider while a 0 selects a 14:1 voltage divider. + type: boolean +required: + - compatible + - reg + +examples: + - | + #include + #include + i2c0 { + #address-cells = <1>; + #size-cells = <0>; + + adc@b4 { + compatible = "adi,adm1177"; + reg = <0xb4>; + }; + }; +... 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Signed-off-by: Beniamin Bia --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 0fca3b055985..41a34d7a802c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -962,6 +962,15 @@ W: http://ez.analog.com/community/linux-device-drivers F: drivers/iio/imu/adis16460.c F: Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml +ANALOG DEVICES INC ADM1177 DRIVER +M: Beniamin Bia +M: Michael Hennerich +L: linux-iio@vger.kernel.org +W: http://ez.analog.com/community/linux-device-drivers +S: Supported +F: drivers/iio/adc/adm1177.c +F: Documentation/devicetree/bindings/iio/adc/adi,adm1177.yaml + ANALOG DEVICES INC ADP5061 DRIVER M: Stefan Popa L: linux-pm@vger.kernel.org