From patchwork Mon Apr 15 22:28:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Leis X-Patchwork-Id: 10901653 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 75A64139A for ; Mon, 15 Apr 2019 22:28:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B34028892 for ; Mon, 15 Apr 2019 22:28:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4C7A528896; Mon, 15 Apr 2019 22:28:17 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL 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 70ABF28892 for ; Mon, 15 Apr 2019 22:28:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728122AbfDOW2M (ORCPT ); Mon, 15 Apr 2019 18:28:12 -0400 Received: from mail-yw1-f73.google.com ([209.85.161.73]:43918 "EHLO mail-yw1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726593AbfDOW2M (ORCPT ); Mon, 15 Apr 2019 18:28:12 -0400 Received: by mail-yw1-f73.google.com with SMTP id s65so14148947ywf.10 for ; Mon, 15 Apr 2019 15:28:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=pBC2TgvbGrGf0oBEqdoDV5H6EH9nM72bScimiFRtJZI=; b=VfbB38ETCcqlgLVuVHaFSVZDNAdsTSS6QsMNkgGW1WMM6ITUCkT4mR8bWayZ/JBufo +azso+VRm9fo55sFnUmeBqWJvsSY8XJ/yaXpVqaFgzQVOMIjccm9LMMB54YuSH88Vg6U f1igRnEEbhoINkHs6KevO2Z12DV70MgEutlndWC56RAi+sWLijeEr95mo+HRGcVnAfT6 WWe16Y88OMcSoZZ7TVQbruxWXadzian4okgwpJnRyoEJrUshuPcilmP+eZpi3oizn9IA dgAW2VASs0GKCHjjw4toR+W7HkyOg3MjbptINwBuvyqPQIZhT4vWMZnCWnl/3DhCPajD dXbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=pBC2TgvbGrGf0oBEqdoDV5H6EH9nM72bScimiFRtJZI=; b=hRWKxkRmmz+jwdSQwIFzsII+YIeQSEZo3NRdb3CZsyztcGIPZH2jGPUV6gSbcgA6cH U8vFn1vwGVp4R2R1EZfBUhZxcPNUw4Fh9A17WLBCWzxUMET0gZvOImwYIm0ZX/s4F+nL C3OJnFoHz+A+S4ndV7QTWQkpm1zyvBKWOYkxDwpeo0ouQMz4EWyNk3bE8nj0tD0cewEy pCa/5xx+ty7PKtXdhn/QrqiAHtL91YSzgQcJfDZJOPI0Kf3ebXO3tdMXBaCx7GDhKdDt lNxDdHeu21Jj3lTOs8SSVyXfIG9Y1upRGscv0l2r6X93FzDCEslsGC2CFh37P7SHzcsM rh9g== X-Gm-Message-State: APjAAAXTqPH2XyJoQXXSU6urMnRRZ2oeH7qYbCwTIIBXynB4Lwo0P2dI PW4r3w6C7MePe34W498H2NMYipcaPx1O X-Google-Smtp-Source: APXvYqyqMr5xOE4eTi0Dh82Yl9QMGUfpVu15xQ0bvhFFCfiNYeyeMbDJ4uIupQ57lZBtTkDrFdESc6kVVDOY X-Received: by 2002:a25:6dd7:: with SMTP id i206mr13620970ybc.97.1555367291016; Mon, 15 Apr 2019 15:28:11 -0700 (PDT) Date: Mon, 15 Apr 2019 15:28:07 -0700 Message-Id: <20190415222807.134104-1-venture@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog Subject: [PATCH v6] hwmon: (pmbus/isl68137): Add driver for Intersil ISL68137 PWM Controller From: Patrick Venture To: venture@google.com, linux@roeck-us.net, jdelvare@suse.com, joel@jms.id.au, andrew@aj.id.au Cc: Maxim Sloyko , kunyi@google.com, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Robert Lippert Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Maxim Sloyko Intersil ISL68137 is a digital output 7-phase configurable PWM controller with an AVSBus interface. Signed-off-by: Maxim Sloyko Signed-off-by: Robert Lippert Signed-off-by: Patrick Venture --- v6: Fix reversed logic bug. v5: Drop extra parens Drop extra parameter check v4: Use kstrtobool Cleanup parens Use rc instead of temporary int Delete unnecessary coment Add remove to driver structure v3: Added missing driver documentation Cleaned up goto statements. Add missing error check on pmbus_read_word_data Transitioned to use SENSOR_DEVICE_ATTR_RW Renamed enabled attribute to enable Set up an attribute_group for the enable attribute and added to pmbus_info Removed the boilerplate driver remove method v2: Fixed bad header ordering. v1: Original new patchset with fixes from Rob Lippert. --- Documentation/hwmon/isl68137 | 72 ++++++++++++++ drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/isl68137.c | 169 +++++++++++++++++++++++++++++++++ 4 files changed, 251 insertions(+) create mode 100644 Documentation/hwmon/isl68137 create mode 100644 drivers/hwmon/pmbus/isl68137.c diff --git a/Documentation/hwmon/isl68137 b/Documentation/hwmon/isl68137 new file mode 100644 index 0000000000000..92e5c5fc5b777 --- /dev/null +++ b/Documentation/hwmon/isl68137 @@ -0,0 +1,72 @@ +Kernel driver isl68137 +====================== + +Supported chips: + * Intersil ISL68137 + Prefix: 'isl68137' + Addresses scanned: - + Datasheet: Publicly available at the Intersil website + https://www.intersil.com/content/dam/Intersil/documents/isl6/isl68137.pdf + +Authors: + Maxim Sloyko + Robert Lippert + Patrick Venture + +Description +----------- + +Intersil ISL68137 is a digital output 7-phase configurable PWM +controller with an AVSBus interface. + +Usage Notes +----------- + +This driver does not probe for PMBus devices. You will have to instantiate +devices explicitly. + +The ISL68137 AVS operation mode must be enabled/disabled at runtime. + +Beyond the normal sysfs pmbus attributes, the driver exposes a control attribute. + +Additional Sysfs attributes +--------------------------- + +avs(0|1)_enable Controls the AVS state of each rail. + +curr1_label "iin" +curr1_input Measured input current +curr1_crit Critical maximum current +curr1_crit_alarm Current critical high alarm + +curr[2-3]_label "iout[1-2]" +curr[2-3]_input Measured output current +curr[2-3]_crit Critical maximum current +curr[2-3]_crit_alarm Current critical high alarm + +in1_label "vin" +in1_input Measured input voltage +in1_lcrit Critical minimum input voltage +in1_lcrit_alarm Input voltage critical low alarm +in1_crit Critical maximum input voltage +in1_crit_alarm Input voltage critical high alarm + +in[2-3]_label "vout[1-2]" +in[2-3]_input Measured output voltage +in[2-3]_lcrit Critical minimum output voltage +in[2-3]_lcrit_alarm Output voltage critical low alarm +in[2-3]_crit Critical maximum output voltage +in[2-3]_crit_alarm Output voltage critical high alarm + +power1_label "pin" +power1_input Measured input power +power1_alarm Input power high alarm + +power[2-3]_label "pout[1-2]" +power[2-3]_input Measured output power + +temp[1-3]_input Measured temperature +temp[1-3]_crit Critical high temperature +temp[1-3]_crit_alarm Chip temperature critical high alarm +temp[1-3]_max Maximum temperature +temp[1-3]_max_alarm Chip temperature high alarm diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index de87abab990e5..7edab7e30eaf9 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -63,6 +63,15 @@ config SENSORS_IR38064 This driver can also be built as a module. If so, the module will be called ir38064. +config SENSORS_ISL68137 + tristate "Intersil ISL68137" + help + If you say yes here you get hardware monitoring support for Intersil + ISL68137. + + This driver can also be built as a module. If so, the module will + be called isl68137. + config SENSORS_LM25066 tristate "National Semiconductor LM25066 and compatibles" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 7d1fa6b3c8c93..2219b93003167 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o obj-$(CONFIG_SENSORS_IR35221) += ir35221.o obj-$(CONFIG_SENSORS_IR38064) += ir38064.o +obj-$(CONFIG_SENSORS_ISL68137) += isl68137.o obj-$(CONFIG_SENSORS_LM25066) += lm25066.o obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o diff --git a/drivers/hwmon/pmbus/isl68137.c b/drivers/hwmon/pmbus/isl68137.c new file mode 100644 index 0000000000000..515596c92fe1c --- /dev/null +++ b/drivers/hwmon/pmbus/isl68137.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hardware monitoring driver for Intersil ISL68137 + * + * Copyright (c) 2017 Google Inc + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +#define ISL68137_VOUT_AVS 0x30 + +static ssize_t isl68137_avs_enable_show_page(struct i2c_client *client, + int page, + char *buf) +{ + int val = pmbus_read_byte_data(client, page, PMBUS_OPERATION); + + return sprintf(buf, "%d\n", + (val & ISL68137_VOUT_AVS) == ISL68137_VOUT_AVS ? 1 : 0); +} + +static ssize_t isl68137_avs_enable_store_page(struct i2c_client *client, + int page, + const char *buf, size_t count) +{ + int rc, op_val; + bool result; + + rc = kstrtobool(buf, &result); + if (rc) + return rc; + + op_val = result ? ISL68137_VOUT_AVS : 0; + + /* + * Writes to VOUT setpoint over AVSBus will persist after the VRM is + * switched to PMBus control. Switching back to AVSBus control + * restores this persisted setpoint rather than re-initializing to + * PMBus VOUT_COMMAND. Writing VOUT_COMMAND first over PMBus before + * enabling AVS control is the workaround. + */ + if (op_val == ISL68137_VOUT_AVS) { + rc = pmbus_read_word_data(client, page, PMBUS_VOUT_COMMAND); + if (rc < 0) + return rc; + + rc = pmbus_write_word_data(client, page, PMBUS_VOUT_COMMAND, + rc); + if (rc < 0) + return rc; + } + + rc = pmbus_update_byte_data(client, page, PMBUS_OPERATION, + ISL68137_VOUT_AVS, op_val); + + return (rc < 0) ? rc : count; +} + +static ssize_t isl68137_avs_enable_show(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + + return isl68137_avs_enable_show_page(client, attr->index, buf); +} + +static ssize_t isl68137_avs_enable_store(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + + return isl68137_avs_enable_store_page(client, attr->index, buf, count); +} + +static SENSOR_DEVICE_ATTR_RW(avs0_enable, isl68137_avs_enable, 0); +static SENSOR_DEVICE_ATTR_RW(avs1_enable, isl68137_avs_enable, 1); + +static struct attribute *enable_attrs[] = { + &sensor_dev_attr_avs0_enable.dev_attr.attr, + &sensor_dev_attr_avs1_enable.dev_attr.attr, + NULL, +}; + +static const struct attribute_group enable_group = { + .attrs = enable_attrs, +}; + +static const struct attribute_group *attribute_groups[] = { + &enable_group, + NULL, +}; + +static struct pmbus_driver_info isl68137_info = { + .pages = 2, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_IN] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 1, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 3, + .m[PSC_VOLTAGE_OUT] = 1, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 3, + .m[PSC_CURRENT_IN] = 1, + .b[PSC_CURRENT_IN] = 0, + .R[PSC_CURRENT_IN] = 2, + .m[PSC_CURRENT_OUT] = 1, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 1, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 0, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 0, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 + | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP + | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, + .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, + .groups = attribute_groups, +}; + +static int isl68137_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + return pmbus_do_probe(client, id, &isl68137_info); +} + +static const struct i2c_device_id isl68137_id[] = { + {"isl68137", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, isl68137_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver isl68137_driver = { + .driver = { + .name = "isl68137", + }, + .probe = isl68137_probe, + .remove = pmbus_do_remove, + .id_table = isl68137_id, +}; + +module_i2c_driver(isl68137_driver); + +MODULE_AUTHOR("Maxim Sloyko "); +MODULE_DESCRIPTION("PMBus driver for Intersil ISL68137"); +MODULE_LICENSE("GPL");