From patchwork Fri Jun 18 03:09:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ainux Wang X-Patchwork-Id: 12330033 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 A7481C2B9F4 for ; Fri, 18 Jun 2021 03:09:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F52D613A9 for ; Fri, 18 Jun 2021 03:09:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231209AbhFRDL7 (ORCPT ); Thu, 17 Jun 2021 23:11:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229848AbhFRDL7 (ORCPT ); Thu, 17 Jun 2021 23:11:59 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA762C061574; Thu, 17 Jun 2021 20:09:49 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id e1so3947967plh.8; Thu, 17 Jun 2021 20:09:49 -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=Ayg6wFiDxOikWkbYwKKzI397rT527PaW2uI5rOQN9fg=; b=Q39YNnWZT4wHFJoXywn7wHSOMEbdH1XsqiYS4pizzh5KQCxV4DzAc+Z3u5tIYbegaC CEIxgxmSgS8G3hmvpY9Ik+EUPyK/eyc/BvYJQCFcB8ie9UXSN3GpRXkruifz2BjoD1YN ZlIWTnNqLQjQv444ey1pXHoMRnwXVbNvFiyI7cg1snjgWYoonHmGPW34eVtwWqel0xyR CJG0Ly7acB4oMDfgZTRLVF38XJR5SMNkO2z0XoD3ByGJJ6SVQLi0mkNDRLXkUkk2AjMy WQkxu89d1ZJcXdMeni2gEEd2ZsoBOR32+fU/txOnL0gFK1Jgfi5+hc27QGVAA5kQqOuv bHOg== 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=Ayg6wFiDxOikWkbYwKKzI397rT527PaW2uI5rOQN9fg=; b=UCR0CYdW5mHklhuDbLA3xeBgg0FwH/gYnOLDjRwJNhCd493b8G1rzA/FOdih8UCf3F JrsDETJObA5EkFpmxaaP+5lLlrgbEyXZTDml9jFJ3VwDSYnXyCrTxsb+y9Zc15PbyHdW SeNNRuCNGPvruNywl/xsSDgpwWdCe2Dp79NHYR2Go+arxzfOA21Clmbql1xIn28TO15H +iUd2fUNhH5PcZL6NEM8nenUqeY9IHGFij6KovQ6Y4J3sCZBfNm4o54qrIdov4jAPIyr e+SD3fymrw+Pm5c5P8CSV154viJn+PEE7IYNQgQw/sIBlmGHEmRoy5aHN503scQnJHSB eYmg== X-Gm-Message-State: AOAM533lsCeY4HHB0DrWqIhmUSvVDTr9C6hD3Bgte6zYsC/HO6DFwzd+ yFj8l2Mfoq4GvuLj+7r8LII= X-Google-Smtp-Source: ABdhPJzIt2nN+k2t8RNRAxQJWU0OZOvHPUOVIAgJxvHowCTasnk5tw4wtrcgoX4HPmzIGTA5HmUqEA== X-Received: by 2002:a17:90a:5b14:: with SMTP id o20mr12718497pji.131.1623985788756; Thu, 17 Jun 2021 20:09:48 -0700 (PDT) Received: from localhost.localdomain ([23.100.94.64]) by smtp.gmail.com with ESMTPSA id w142sm6759879pff.154.2021.06.17.20.09.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Jun 2021 20:09:48 -0700 (PDT) From: ainux.wang@gmail.com To: jdelvare@suse.com, linux@roeck-us.net, corbet@lwn.net, ainux.wang@gmail.com Cc: linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, sterlingteng@gmail.com, chenhuacai@kernel.org, chenhuacai@loongson.cn Subject: [PATCH v2] hwmon: (pmbus) Add support for MPS MP2949A Date: Fri, 18 Jun 2021 11:09:34 +0800 Message-Id: <20210618030934.27376-1-ainux.wang@gmail.com> X-Mailer: git-send-email 2.18.1 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org From: "Ainux.Wang" Add support for MP2949A device from Monolithic Power Systems, Inc. (MPS). This is a triple-loop, digital, multi-phase controller. This device: - Supports up to three power rail. - Provides 6 pulse-width modulations (PWMs), and can be configured up to 6-phase operation for Rail A , up to 2-phase operation for Rail B and up to 1-phase operation for Rail C. - The PMBus registers are distributed into three pages: Page 0, Page 1, Page 2. Page 0 contains the registers for Rail A and most of the common settings for all of the rails. Page 1 contains register information for Rail B. Page 2 contains register information for Rail C. - The MP2949A supports both 5mV VID step and 10mv VID step for IMVP8 and IMVP9 with only one DAC for each rail to generate REF. Signed-off-by: Ainux.Wang --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/mp2949a.rst | 44 ++++++++++++ drivers/hwmon/pmbus/Kconfig | 9 +++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mp2949a.c | 119 ++++++++++++++++++++++++++++++++ 5 files changed, 174 insertions(+) create mode 100644 Documentation/hwmon/mp2949a.rst create mode 100644 drivers/hwmon/pmbus/mp2949a.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 9ed60fa84cbe..56aac3b1678d 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -137,6 +137,7 @@ Hardware Monitoring Kernel Drivers mcp3021 menf21bmc mlxreg-fan + mp2949a mp2975 nct6683 nct6775 diff --git a/Documentation/hwmon/mp2949a.rst b/Documentation/hwmon/mp2949a.rst new file mode 100644 index 000000000000..ac4084e067f1 --- /dev/null +++ b/Documentation/hwmon/mp2949a.rst @@ -0,0 +1,44 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver mp2949a +==================== + +Supported chips: + + * MPS MP2949A + + Prefix: 'mp2949a' + +Author: + + Ainux Wang + +Description +----------- + +This driver implements support for Monolithic Power Systems, Inc. (MPS) +triple-loop, digital, multi-phase controller MP2949A. + +This device: + +- Supports up to three power rail. +- Provides 6 pulse-width modulations (PWMs), and can be configured up + to 6-phase operation for Rail A , up to 2-phase operation for Rail B + and up to 1-phase operation for Rail C. +- The PMBus registers are distributed into three pages: Page 0, Page 1, + Page 2. Page 0 contains the registers for Rail A and most of the common + settings for all of the rails. Page 1 contains register information for + Rail B. Page 2 contains register information for Rail C. +- The MP2949A supports both 5mV VID step and 10mv VID step for IMVP8 and + IMVP9 with only one DAC for each rail to generate REF. + +Device supports: + +- SVID interface. +- PMBus rev 1.2 interface. + +Device supports direct format for reading output power. +Device supports linear format for reading input voltage and output current +and temperature. +Device supports VID for reading output voltage. +The below VID modes are supported: VR12, VR13, IMVP8, IMVP9. diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 37a5c39784fa..b1344b265976 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -248,6 +248,15 @@ config SENSORS_MAX8688 This driver can also be built as a module. If so, the module will be called max8688. +config SENSORS_MP2949A + tristate "MPS MP2949A" + help + If you say yes here you get hardware monitoring support for MPS + MP2949A Triple Loop Digital Multi-Phase Controller. + + This driver can also be built as a module. If so, the module will + be called mp2949a. + config SENSORS_MP2975 tristate "MPS MP2975" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index f8dcc27cd56a..bfb55ab12da1 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_SENSORS_MAX20751) += max20751.o obj-$(CONFIG_SENSORS_MAX31785) += max31785.o obj-$(CONFIG_SENSORS_MAX34440) += max34440.o obj-$(CONFIG_SENSORS_MAX8688) += max8688.o +obj-$(CONFIG_SENSORS_MP2949A) += mp2949a.o obj-$(CONFIG_SENSORS_MP2975) += mp2975.o obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o diff --git a/drivers/hwmon/pmbus/mp2949a.c b/drivers/hwmon/pmbus/mp2949a.c new file mode 100644 index 000000000000..d68e8526abe3 --- /dev/null +++ b/drivers/hwmon/pmbus/mp2949a.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Hardware monitoring driver for Monolithic Power Systems MP2949A + * + * Copyright (c) 2021 Lemote Technologies. All rights reserved. + * Copyright (c) 2021 Ainux + */ + +#include +#include +#include +#include +#include +#include "pmbus.h" + +#define MP2949A_PAGE_NUM 3 + +static int mp2949a_read_byte_data(struct i2c_client *client, int page, int reg) +{ + switch (reg) { + case PMBUS_VOUT_MODE: + /* This chip do not support the VOUT_MODE command. */ + return -EINVAL; + default: + return -ENODATA; + } +} + +static int mp2949a_identify(struct i2c_client *client, + struct pmbus_driver_info *info) +{ + u8 vout_params; + int i, ret; + + for (i = 0; i < MP2949A_PAGE_NUM; i++) { + /* Read the register with VOUT scaling value.*/ + ret = pmbus_read_byte_data(client, i, PMBUS_VOUT_MODE); + if (ret < 0) + return ret; + + /* + * Rail A bit 5, Rail B bit 4, Rail C bit 3. + * 1'b1: 5mV (vr12/imvp8) + * 1'b0: 10mv (imvp9) + */ + vout_params = ret & ~BIT(5-i); + if (vout_params) + info->vrm_version[i] = vr12; + else + info->vrm_version[i] = imvp9; + + } + + return 0; +} + +static struct pmbus_driver_info mp2949a_info = { + .pages = MP2949A_PAGE_NUM, + .format[PSC_VOLTAGE_IN] = linear, + .format[PSC_VOLTAGE_OUT] = vid, + .format[PSC_CURRENT_OUT] = linear, + .format[PSC_TEMPERATURE] = linear, + .format[PSC_POWER] = direct, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 0, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_TEMP | PMBUS_HAVE_POUT, + .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_POUT, + .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_POUT, + .identify = mp2949a_identify, + .read_byte_data = mp2949a_read_byte_data, +}; + +static int mp2949a_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pmbus_driver_info *info; + + info = devm_kmemdup(&client->dev, &mp2949a_info, sizeof(*info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + return pmbus_do_probe(client, info); +} + +static const struct i2c_device_id mp2949a_id[] = { + {"mp2949a", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, mp2949a_id); + +static const struct of_device_id mp2949a_of_match[] = { + {.compatible = "mps,mp2949a"}, + {} +}; +MODULE_DEVICE_TABLE(of, mp2949a_of_match); + +static struct i2c_driver mp2949a_driver = { + .driver = { + .name = "mp2949a", + .of_match_table = of_match_ptr(mp2949a_of_match), + }, + .probe = mp2949a_probe, + .id_table = mp2949a_id, +}; + +module_i2c_driver(mp2949a_driver); + +MODULE_AUTHOR("Ainux "); +MODULE_DESCRIPTION("PMBus driver for Monolithic Power Systems MP2949A"); +MODULE_LICENSE("GPL");