From patchwork Tue Jun 16 08:25:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lars Povlsen X-Patchwork-Id: 11606841 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 9A2B86A2 for ; Tue, 16 Jun 2020 08:26:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 825EF207C4 for ; Tue, 16 Jun 2020 08:26:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="u7ES9Sgb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727857AbgFPI0X (ORCPT ); Tue, 16 Jun 2020 04:26:23 -0400 Received: from esa5.microchip.iphmx.com ([216.71.150.166]:19855 "EHLO esa5.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727826AbgFPI0X (ORCPT ); Tue, 16 Jun 2020 04:26:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1592295983; x=1623831983; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=tnuVjKf68iQPKV3kfPktS/BFcn/FuHT5VzoKzWI08Qc=; b=u7ES9SgbX4jwrASuuNKS/j2+pS6aWFfUHFwWZiwuwSDe3C5oyi6G0thg PCEoJMT6waQMwj4spNmhD5UdDzMxCP2YaQwpC3cglKpvHCYGp0xyJZW7U reKxSudeYFa7vIJPByGvXLqCPILl8l1wSmbC40P/IR1S3kqBjpxlu0ryA TTy3yKeSoqKSWp3akAeVrUQcXTVVS9a7JfKt6s+5+aQVAKffJWu0qRUAI nSUZS6g6E01jtihZGp/PBit3Ulu7Bg1Z9+Vz/uQkqz8I1GVB6qEiIEr33 BbwNiSXxulsrf1oVRLZd5uEDeTy9ri7PH/YFrdjlr0lO+FzW4kM2M2qBq Q==; IronPort-SDR: 403Vml5SiLZQWr9N4Qe6SHADyH6fj9ZxzF3dkBVEWQ2JiTJzoavxQ25jGaO9NWS5gkBFuM8ikP u6HfRvuoZIsXFhsULnwdn5u8zfFQBQrwsX+eVQXiRH8Kt06V6+sYjjKeKbrrUzqqAGxqD2Dbvj IhEOA36cesYg0EpbkXJPndQJSDAqCPUowxDcJV2TXWWgpw+nRyJbL3KHIWz4NC81b2wPgkVwh9 7tktFypAn7dy3UfevFOQyvI361KNi8GRHbDMben5EgN+dcpI6J13SJLC353r2lJ0xUsqRX3zNn sNU= X-IronPort-AV: E=Sophos;i="5.73,518,1583218800"; d="scan'208";a="79621947" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 16 Jun 2020 01:26:23 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Tue, 16 Jun 2020 01:26:20 -0700 Received: from soft-dev15.microsemi.net (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Tue, 16 Jun 2020 01:26:18 -0700 From: Lars Povlsen To: Guenter Roeck CC: Lars Povlsen , Jean Delvare , Microchip Linux Driver Support , , , , , Alexandre Belloni Subject: [PATCH v3 3/3] hwmon: sparx5: Add Sparx5 SoC temperature driver Date: Tue, 16 Jun 2020 10:25:56 +0200 Message-ID: <20200616082556.27877-4-lars.povlsen@microchip.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616082556.27877-1-lars.povlsen@microchip.com> References: <20200616082556.27877-1-lars.povlsen@microchip.com> MIME-Version: 1.0 Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org This patch adds a temperature sensor driver to the Sparx5 SoC. Signed-off-by: Lars Povlsen --- drivers/hwmon/Kconfig | 10 +++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sparx5-temp.c | 136 ++++++++++++++++++++++++++++++++++++ 3 files changed, 147 insertions(+) create mode 100644 drivers/hwmon/sparx5-temp.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 288ae9f63588c..7fb5e0c6c6306 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -515,6 +515,16 @@ config SENSORS_I5K_AMB This driver can also be built as a module. If so, the module will be called i5k_amb. +config SENSORS_SPARX5 + tristate "Sparx5 SoC temperature sensor" + depends on ARCH_SPARX5 || COMPILE_TEST + help + If you say yes here you get support for temperature monitoring + with the Microchip Sparx5 SoC. + + This driver can also be built as a module. If so, the module + will be called sparx5-temp. + config SENSORS_F71805F tristate "Fintek F71805F/FG, F71806F/FG and F71872F/FG" depends on !PPC diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 3e32c21f5efe3..857293f650412 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -167,6 +167,7 @@ obj-$(CONFIG_SENSORS_SMM665) += smm665.o obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o +obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o obj-$(CONFIG_SENSORS_STTS751) += stts751.o obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o obj-$(CONFIG_SENSORS_TC74) += tc74.o diff --git a/drivers/hwmon/sparx5-temp.c b/drivers/hwmon/sparx5-temp.c new file mode 100644 index 0000000000000..4ed8a2aec3ae9 --- /dev/null +++ b/drivers/hwmon/sparx5-temp.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Sparx5 SoC temperature sensor driver + * + * Copyright (C) 2020 Lars Povlsen + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TEMP_CTRL 0 +#define TEMP_CFG 4 +#define TEMP_CFG_CYCLES GENMASK(24, 15) +#define TEMP_CFG_ENA BIT(0) +#define TEMP_STAT 8 +#define TEMP_STAT_VALID BIT(12) +#define TEMP_STAT_TEMP GENMASK(11, 0) + +struct s5_hwmon { + void __iomem *base; +}; + +static void s5_temp_enable(struct s5_hwmon *hwmon) +{ + u32 val = readl(hwmon->base + TEMP_CFG); + u32 clk = 250; + + val &= ~TEMP_CFG_CYCLES; + val |= FIELD_PREP(TEMP_CFG_CYCLES, clk); + val |= TEMP_CFG_ENA; + + writel(val, hwmon->base + TEMP_CFG); +} + +static int s5_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *temp) +{ + struct s5_hwmon *hwmon = dev_get_drvdata(dev); + int rc = 0, value; + u32 stat; + + switch (attr) { + case hwmon_temp_input: + stat = readl_relaxed(hwmon->base + TEMP_STAT); + if (!(stat & TEMP_STAT_VALID)) + return -EIO; + value = stat & TEMP_STAT_TEMP; + value = DIV_ROUND_CLOSEST(value * 3522, 4096) - 1094; + value *= 100; + *temp = value; + break; + default: + rc = -EOPNOTSUPP; + break; + } + + return rc; +} + +static umode_t s5_is_visible(const void *_data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + if (type != hwmon_temp) + return 0; + + switch (attr) { + case hwmon_temp_input: + return 0444; + default: + return 0; + } +} + +static const struct hwmon_channel_info *s5_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), + NULL +}; + +static const struct hwmon_ops s5_hwmon_ops = { + .is_visible = s5_is_visible, + .read = s5_read, +}; + +static const struct hwmon_chip_info s5_chip_info = { + .ops = &s5_hwmon_ops, + .info = s5_info, +}; + +static int s5_temp_probe(struct platform_device *pdev) +{ + struct device *hwmon_dev; + struct s5_hwmon *hwmon; + + hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + hwmon->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(hwmon->base)) + return PTR_ERR(hwmon->base); + + s5_temp_enable(hwmon); + + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, + "s5_temp", + hwmon, + &s5_chip_info, + NULL); + + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +const struct of_device_id s5_temp_match[] = { + { .compatible = "microchip,sparx5-temp" }, + {}, +}; +MODULE_DEVICE_TABLE(of, s5_temp_match); + +static struct platform_driver s5_temp_driver = { + .probe = s5_temp_probe, + .driver = { + .name = "sparx5-temp", + .of_match_table = s5_temp_match, + }, +}; + +module_platform_driver(s5_temp_driver); + +MODULE_AUTHOR("Lars Povlsen "); +MODULE_DESCRIPTION("Sparx5 SoC temperature sensor driver"); +MODULE_LICENSE("GPL");