From patchwork Wed Dec 7 17:37:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravanan Sekar X-Patchwork-Id: 631666 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BD0DC4708E for ; Wed, 7 Dec 2022 17:37:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230035AbiLGRhq (ORCPT ); Wed, 7 Dec 2022 12:37:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230039AbiLGRhm (ORCPT ); Wed, 7 Dec 2022 12:37:42 -0500 Received: from gateway20.websitewelcome.com (gateway20.websitewelcome.com [192.185.52.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F062023BED for ; Wed, 7 Dec 2022 09:37:39 -0800 (PST) Received: from atl1wswcm04.websitewelcome.com (unknown [50.6.129.165]) by atl1wswob01.websitewelcome.com (Postfix) with ESMTP id 0F4DF401448AF for ; Wed, 7 Dec 2022 17:37:39 +0000 (UTC) Received: from md-in-79.webhostbox.net ([43.225.55.182]) by cmsmtp with ESMTP id 2yMSpfG3S2cIM2yMUpwkdD; Wed, 07 Dec 2022 17:37:39 +0000 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linumiz.com ; s=default; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=wVWfEFOzMBLqUL1rWpwXsPoqdXN3/xrh+/ZFlA2PqQY=; b=jQWoOEFTbqzGXAMBYgoDkezzCN NnyMmO76yahFPgu4Bndu14s3LzXcFzrLR9czGAqwheo0AIySfMHP85ExTuGSk3DEZCNqRePP+q+N5 g9riiRllElpCFYhsKhi1eMBHGoHRKLaOxeOmCbnUkZ2pHeOTb3+Xo1TSFARDtAFQOJ1XPdsC/mFIp JworZ6d2CzzzMHiQYQA00EBN5OiKiOUApvMMQ47YRV6aShl1udkZ1F43EYIqYUT6PDcJZ9ZdjlAl1 SBnTjHSzQSgmoNCJeBTqxI9t910pzpjfa8PlpdUXYKdYn9ZvExxweUhc3YdDDP3IC+kC3p+H1m/Ul Ig6aTTuQ==; Received: from [106.222.117.249] (port=8172 helo=discovery..) by md-in-79.webhostbox.net with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1p2yMR-0025qb-98; Wed, 07 Dec 2022 17:37:35 +0000 From: Saravanan Sekar To: jdelvare@suse.com, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, marten.lindahl@axis.com Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Saravanan Sekar Subject: [PATCH v3 3/4] hwmon: (pmbus/mpq7932) Add a support for mpq7932 Power Management IC Date: Wed, 7 Dec 2022 18:37:15 +0100 Message-Id: <20221207173716.123223-4-saravanan@linumiz.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221207173716.123223-1-saravanan@linumiz.com> References: <20221207173716.123223-1-saravanan@linumiz.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - md-in-79.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - linumiz.com X-BWhitelist: no X-Source-IP: 106.222.117.249 X-Source-L: No X-Exim-ID: 1p2yMR-0025qb-98 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (discovery..) [106.222.117.249]:8172 X-Source-Auth: saravanan@linumiz.com X-Email-Count: 26 X-Source-Cap: bGludW1jbWM7aG9zdGdhdG9yO21kLWluLTc5LndlYmhvc3Rib3gubmV0 X-Local-Domain: yes X-CMAE-Envelope: MS4xfCzwcdQux4NAbX5fXdRHwQeGoArcwnirMbPrQM3qpgPZMDUNUPTNCUaiaNtZSNL2eZ1YD8ILaBlGFIS88N8IUmphL1jDiSh3fmTgDQfaR3U01r1/AVqn 3+rMhnUBlLGvUC6EIjPThJro/Tj5wQNE3UyGAH5CJFcyALYFKLRMwFYNrrXgmPDqnn+vxIugFJjO8ZoUwt8WehWY5uWsttfPnvI= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The MPQ7932 is a power management IC designed to operate from 5V buses to power a variety of Advanced driver-assistance system SOCs. Six integrated buck converters with hardware monitoring capability powers a variety of target rails configurable over PMBus interface. Signed-off-by: Saravanan Sekar --- drivers/hwmon/pmbus/Kconfig | 16 ++++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mpq7932.c | 153 ++++++++++++++++++++++++++++++++++ 3 files changed, 170 insertions(+) create mode 100644 drivers/hwmon/pmbus/mpq7932.c diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 89668af67206..30448e049486 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -317,6 +317,22 @@ config SENSORS_MP5023 This driver can also be built as a module. If so, the module will be called mp5023. +config SENSORS_MPQ7932_REGULATOR + bool "Regulator support for MPQ7932" + depends on SENSORS_MPQ7932 && REGULATOR + help + If you say yes here you get six integrated buck converter regulator + support for power management IC MPS MPQ7932. + +config SENSORS_MPQ7932 + tristate "MPS MPQ7932" + help + If you say yes here you get hardware monitoring functionality support + for power management IC MPS MPQ7932. + + This driver can also be built as a module. If so, the module will + be called mpq7932. + config SENSORS_PIM4328 tristate "Flex PIM4328 and compatibles" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 0002dbe22d52..d9d2fa4bd6f7 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o obj-$(CONFIG_SENSORS_MP2888) += mp2888.o obj-$(CONFIG_SENSORS_MP2975) += mp2975.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o +obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o diff --git a/drivers/hwmon/pmbus/mpq7932.c b/drivers/hwmon/pmbus/mpq7932.c new file mode 100644 index 000000000000..1dc1ab71957b --- /dev/null +++ b/drivers/hwmon/pmbus/mpq7932.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * mpq7932.c - hwmon with optional regulator driver for mps mpq7932 + * Copyright 2022 Monolithic Power Systems, Inc + * + * Author: Saravanan Sekar + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +#define MPQ7932_BUCK_UV_MIN 206250 +#define MPQ7932_UV_STEP 6250 +#define MPQ7932_N_VOLTAGES 256 +#define MPQ7932_VOUT_MAX 0xFF +#define MPQ7932_NUM_PAGES 6 + +#define MPQ7932_TON_DELAY 0x60 +#define MPQ7932_VOUT_STARTUP_SLEW 0xA3 +#define MPQ7932_VOUT_SHUTDOWN_SLEW 0xA5 +#define MPQ7932_VOUT_SLEW_MASK GENMASK(1, 0) +#define MPQ7932_TON_DELAY_MASK GENMASK(4, 0) + +struct mpq7932_data { + struct pmbus_driver_info info; + struct pmbus_platform_data pdata; +}; + +#if IS_ENABLED(CONFIG_SENSORS_MPQ7932_REGULATOR) +static struct regulator_desc mpq7932_regulators_desc[] = { + PMBUS_REGULATOR_STEP("buck", 0, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), + PMBUS_REGULATOR_STEP("buck", 1, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), + PMBUS_REGULATOR_STEP("buck", 2, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), + PMBUS_REGULATOR_STEP("buck", 3, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), + PMBUS_REGULATOR_STEP("buck", 4, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), + PMBUS_REGULATOR_STEP("buck", 5, MPQ7932_N_VOLTAGES, + MPQ7932_UV_STEP, MPQ7932_BUCK_UV_MIN), +}; +#endif + +static int mpq7932_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + switch (reg) { + /* chip support only byte access for VOUT_COMMAND otherwise + * results -EREMOTEIO + */ + case PMBUS_VOUT_COMMAND: + return pmbus_write_byte_data(client, page, reg, word & 0xFF); + + default: + return -ENODATA; + } +} + +static int mpq7932_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + switch (reg) { + /* chip support neither (PMBUS_VOUT_MARGIN_HIGH, PMBUS_VOUT_MARGIN_LOW) + * nor (PMBUS_MFR_VOUT_MIN, PMBUS_MFR_VOUT_MAX). As a result set voltage + * fails due to error in pmbus_regulator_get_low_margin, so faked. + */ + case PMBUS_MFR_VOUT_MIN: + return 0; + + case PMBUS_MFR_VOUT_MAX: + return MPQ7932_VOUT_MAX; + + /* chip support only byte access for VOUT_COMMAND otherwise + * results -EREMOTEIO + */ + case PMBUS_READ_VOUT: + return pmbus_read_byte_data(client, page, PMBUS_VOUT_COMMAND); + + default: + return -ENODATA; + } +} + +static int mpq7932_probe(struct i2c_client *client) +{ + struct mpq7932_data *data; + struct pmbus_driver_info *info; + struct device *dev = &client->dev; + int i; + + data = devm_kzalloc(dev, sizeof(struct mpq7932_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + info = &data->info; + info->pages = MPQ7932_NUM_PAGES; + info->format[PSC_VOLTAGE_OUT] = direct; + info->m[PSC_VOLTAGE_OUT] = 160; + info->b[PSC_VOLTAGE_OUT] = -33; + for (i = 0; i < info->pages; i++) { + info->func[i] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_STATUS_TEMP; + } + +#if IS_ENABLED(CONFIG_SENSORS_MPQ7932_REGULATOR) + info->num_regulators = ARRAY_SIZE(mpq7932_regulators_desc); + info->reg_desc = mpq7932_regulators_desc; +#endif + + info->read_word_data = mpq7932_read_word_data; + info->write_word_data = mpq7932_write_word_data; + + data->pdata.flags = PMBUS_NO_CAPABILITY; + dev->platform_data = &data->pdata; + + return pmbus_do_probe(client, info); +} + +static const struct of_device_id mpq7932_of_match[] = { + { .compatible = "mps,mpq7932"}, + {}, +}; +MODULE_DEVICE_TABLE(of, mpq7932_of_match); + +static const struct i2c_device_id mpq7932_id[] = { + { "mpq7932", }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, mpq7932_id); + +static struct i2c_driver mpq7932_regulator_driver = { + .driver = { + .name = "mpq7932", + .of_match_table = mpq7932_of_match, + }, + .probe_new = mpq7932_probe, + .id_table = mpq7932_id, +}; +module_i2c_driver(mpq7932_regulator_driver); + +MODULE_AUTHOR("Saravanan Sekar "); +MODULE_DESCRIPTION("MPQ7932 PMIC regulator driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS);