From patchwork Thu Nov 2 02:24:17 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lei YU X-Patchwork-Id: 833176 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3yS87X74dtz9t2f for ; Thu, 2 Nov 2017 13:25:12 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="aYRW1j4D"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3yS87X5fWBzDr8P for ; Thu, 2 Nov 2017 13:25:12 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="aYRW1j4D"; dkim-atps=neutral X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:400e:c05::241; helo=mail-pg0-x241.google.com; envelope-from=mine260309@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="aYRW1j4D"; dkim-atps=neutral Received: from mail-pg0-x241.google.com (mail-pg0-x241.google.com [IPv6:2607:f8b0:400e:c05::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3yS87F101szDqlM for ; Thu, 2 Nov 2017 13:24:56 +1100 (AEDT) Received: by mail-pg0-x241.google.com with SMTP id 15so3722328pgc.12 for ; Wed, 01 Nov 2017 19:24:56 -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; bh=rrIQ3YxOh3y6/42nUHjJjvOhOOqpwlqCY+Xwc2yVwnI=; b=aYRW1j4DMGKMD1FCwvDzCqFH5HnqXxMLMXkHeU0DhHPtd+g4N1dLB1WNDB4sGbsnFD s0VYPXovcMicqYwN8Q4eMucx88KjibhhxjTHKmEy28gepC14f15metu6+kgqdv+nehYQ K9GfR4RpR4c3rNxiCIofsBxwtVP5qmFOJW2QGeqqEo+/n4ywvum9oqMy2m603CO/xDOJ 9PdNozajpOmReEPVrR1wqX2EoMyhkQr+uP/aGHD3cGBQ9olDN/86QpncoB3ar1jTyt4B fDAI5aky9S4P9e8OpqUhdSQmOrZOZAumoTR3CZAys1gsHm7KuDJf/wHRfsyELDtB/ONG dr4A== 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; bh=rrIQ3YxOh3y6/42nUHjJjvOhOOqpwlqCY+Xwc2yVwnI=; b=KQjlqHkrHtqqDaotBugBFRep+nzHcgcI3Ycqk/20I6RSamZFzq8zQRLErj3OEcU0IZ zk2GqWJSm68lRIbUhR/SHz0kGMi0sKbk8YeOD/Y7OIx7ihX6HkrGvSVYC9jaIZG7IKhD S3VBsArbk6NvpLnhqN+WyYdr0O62UxOj2TW1IXHIcSQLyr1zb5LaL0wVEgMEi70kl52p UWN2EaCm/NHU31/YAcl4p3AJClEuMF4SNKnXEBpyLguX50yaMsBQjpuAWQwJ9LptD3Dr 93yzQBh28yBytoChjiyYpiNoievr16ruoPagY1bxuMizD/ekOW0t39lf1Rby8T7qGVSl GamA== X-Gm-Message-State: AMCzsaWz7dYEykUDE2XIrxzASoCYEteTxwUFoA/c9F+m2iPW1+T7pKaK HYY9hX97BXBXifuxAwSftG+oifK0 X-Google-Smtp-Source: ABhQp+R+q1EkXoh3ndTj6sTgZrvk0dg13F1ooH2ZPCBdEK7FrD0WWFsBK9DELlTNOQgljazn5gF9/g== X-Received: by 10.99.121.197 with SMTP id u188mr1936517pgc.416.1509589493362; Wed, 01 Nov 2017 19:24:53 -0700 (PDT) Received: from localhost ([159.203.222.251]) by smtp.gmail.com with ESMTPSA id b10sm3507015pfk.20.2017.11.01.19.24.50 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Wed, 01 Nov 2017 19:24:52 -0700 (PDT) From: Lei YU To: openbmc@lists.ozlabs.org Subject: [PATCH linux dev-4.10 1/3] drivers: hwmon: Add W83773G driver Date: Thu, 2 Nov 2017 10:24:17 +0800 Message-Id: <1509589459-26637-1-git-send-email-mine260309@gmail.com> X-Mailer: git-send-email 1.9.1 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" Nuvoton W83773G is a hardware monitor IC providing one local temperature and two remote temperature sensors. Signed-off-by: Lei YU --- drivers/hwmon/Kconfig | 11 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/w83773g.c | 284 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 296 insertions(+) create mode 100644 drivers/hwmon/w83773g.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 9256dd0..40dfa93 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1703,6 +1703,17 @@ config SENSORS_VT8231 This driver can also be built as a module. If so, the module will be called vt8231. +config SENSORS_W83773G + tristate "Nuvoton W83773G" + depends on I2C + select HWMON_VID + help + If you say yes here you get support for the Nuvoton W83773G hardware + monitoring chip. + + This driver can also be built as a module. If so, the module + will be called w83773g. + config SENSORS_W83781D tristate "Winbond W83781D, W83782D, W83783S, Asus AS99127F" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 98000fc..fc26696 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_SENSORS_ATK0110) += asus_atk0110.o # asb100, then w83781d go first, as they can override other drivers' addresses. obj-$(CONFIG_SENSORS_ASB100) += asb100.o obj-$(CONFIG_SENSORS_W83627HF) += w83627hf.o +obj-$(CONFIG_SENSORS_W83773G) += w83773g.o obj-$(CONFIG_SENSORS_W83792D) += w83792d.o obj-$(CONFIG_SENSORS_W83793) += w83793.o obj-$(CONFIG_SENSORS_W83795) += w83795.o diff --git a/drivers/hwmon/w83773g.c b/drivers/hwmon/w83773g.c new file mode 100644 index 0000000..87cc85c --- /dev/null +++ b/drivers/hwmon/w83773g.c @@ -0,0 +1,284 @@ +/* w83773g.c + * + * Copyright (C) 2017 + * Preliminary support by: + * Nick Gruendler, Lei YU + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * Driver for the Nuvoton W83773G SMBus temperature sensor IC. + * Supported models: W83773G + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Addresses to scan */ +static const unsigned short normal_i2c[] = { 0x4c, 0x4d, I2C_CLIENT_END }; + +enum chips { w83773g }; + +/* The W83773 registers */ +#define W83773_CONVERSION_RATE_REG_READ 0x04 +#define W83773_CONVERSION_RATE_REG_WRITE 0x0A +#define W83773_MANUFACTURER_ID_REG 0xFE +#define W83773_LOCAL_TEMP 0x00 + +static const u8 W83773_STATUS[2] = { 0x02, 0x17 }; + +static const u8 W83773_TEMP_LSB[2] = { 0x10, 0x25 }; +static const u8 W83773_TEMP_MSB[2] = { 0x01, 0x24 }; + +static const u8 W83773_OFFSET_LSB[2] = { 0x12, 0x16 }; +static const u8 W83773_OFFSET_MSB[2] = { 0x11, 0x15 }; + +/* Manufacturer / Device ID's */ +#define W83773_MANUFACTURER_ID 0x5c + + +/* this is the number of sensors in the device */ +static const struct i2c_device_id w83773_id[] = { + { "w83773g", 3 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, w83773_id); + +static const struct of_device_id w83773_of_match[] = { + { + .compatible = "nuvoton,w83773g", + .data = (void *)3 + }, + + { }, +}; +MODULE_DEVICE_TABLE(of, w83773_of_match); + +/* + * W83773G has 3 temp sensors: + * Channel 0 is the local sensor + * Channel 1-2 are two remote sensors + */ +struct w83773_data { + struct i2c_client *client; + struct mutex update_lock; + u32 temp_config[4]; + struct hwmon_channel_info temp_info; + const struct hwmon_channel_info *info[2]; + struct hwmon_chip_info chip; + char valid; + unsigned long last_updated; + int channels; + s8 temp_local; + s8 status[2]; + s8 temp_hb[2]; + s8 temp_lb[2]; + s8 offset_hb[2]; + s8 offset_lb[2]; +}; + +static int temp_of_local(s8 reg) +{ + return reg * 1000; +} + +static int temp_of_remote(s8 hb, s8 lb, s8 offset_hb, s8 offset_lb) +{ + return (hb + offset_hb) * 1000 + ((u8)(lb + offset_lb) >> 5) * 125; +} + + +static struct w83773_data *w83773_update_device(struct device *dev) +{ + struct w83773_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int i; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { + data->temp_local = i2c_smbus_read_byte_data(client, W83773_LOCAL_TEMP); + for (i = 0; i < data->channels - 1; i++) { + data->status[i] = i2c_smbus_read_byte_data(client, W83773_STATUS[i]); + data->temp_hb[i] = i2c_smbus_read_byte_data(client, W83773_TEMP_MSB[i]); + data->temp_lb[i] = i2c_smbus_read_byte_data(client, W83773_TEMP_LSB[i]); + data->offset_hb[i] = i2c_smbus_read_byte_data(client, W83773_OFFSET_MSB[i]); + data->offset_lb[i] = i2c_smbus_read_byte_data(client, W83773_OFFSET_LSB[i]); + } + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +static int w83773_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct w83773_data *w83773 = w83773_update_device(dev); + + switch (attr) { + case hwmon_temp_input: + if (channel == 0) { + /* channel 0 is the local temp */ + *val = temp_of_local(w83773->temp_local); + } + else { + /* channel 1-2 are the remote temps */ + channel--; + *val = temp_of_remote( + w83773->temp_hb[channel], + w83773->temp_lb[channel], + w83773->offset_hb[channel], + w83773->offset_lb[channel]); + } + return 0; + case hwmon_temp_fault: + if (channel == 0) + *val = 0; + else + /* Check the status register bit 2 for faults */ + *val = (w83773->status[channel - 1] & 0x04) >> 2; + return 0; + default: + return -EOPNOTSUPP; + } + +} + +static umode_t w83773_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (attr) { + case hwmon_temp_fault: + if (channel == 0) + return 0; + return S_IRUGO; + case hwmon_temp_input: + return S_IRUGO; + default: + return 0; + } +} + +static int w83773_init_client(struct i2c_client *client) +{ + /* Set the conversion rate to 2 Hz */ + i2c_smbus_write_byte_data(client, W83773_CONVERSION_RATE_REG_WRITE, 0x05); + + return 0; +} + +static int w83773_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + enum chips kind; + struct i2c_adapter *adapter = client->adapter; + const char * const names[] = { "W83773G" }; + int addr = client->addr; + u8 reg; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, W83773_MANUFACTURER_ID_REG); + if (reg != W83773_MANUFACTURER_ID) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, W83773_CONVERSION_RATE_REG_READ); + if (reg & 0xf8) + return -ENODEV; + + kind = w83773g; + + strlcpy(info->type, w83773_id[kind].name, I2C_NAME_SIZE); + dev_info(&adapter->dev, "Detected Nuvoton %s chip at 0x%02x\n", + names[kind], client->addr); + + return 0; +} + +static const struct hwmon_ops w83773_ops = { + .is_visible = w83773_is_visible, + .read = w83773_read, +}; + +static int w83773_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct device *hwmon_dev; + struct w83773_data *data; + int i, err; + + data = devm_kzalloc(dev, sizeof(struct w83773_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_init(&data->update_lock); + if (client->dev.of_node) + data->channels = (int)of_device_get_match_data(&client->dev); + else + data->channels = id->driver_data; + data->client = client; + + err = w83773_init_client(client); + if (err) + return err; + + for (i = 0; i < data->channels; i++) + data->temp_config[i] = HWMON_T_INPUT | HWMON_T_FAULT; + + data->chip.ops = &w83773_ops; + data->chip.info = data->info; + + data->info[0] = &data->temp_info; + + data->temp_info.type = hwmon_temp; + data->temp_info.config = data->temp_config; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, + &data->chip, + NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct i2c_driver w83773_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "w83773g", + .of_match_table = of_match_ptr(w83773_of_match), + }, + .probe = w83773_probe, + .id_table = w83773_id, + .detect = w83773_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(w83773_driver); + +MODULE_AUTHOR("Nickolaus Gruendler "); +MODULE_DESCRIPTION("W83773G temperature sensor driver"); +MODULE_LICENSE("GPL");