hwmon: Add Synaptics AS370 PVT sensor driver (7548666e) · Commits · 戴 / test

drivers/hwmon/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -246,6 +246,16 @@ config SENSORS_ADT7475
		This driver can also be built as a module. If so, the module
		will be called adt7475.

		config SENSORS_AS370
		tristate "Synaptics AS370 SoC hardware monitoring driver"
		help
		If you say yes here you get support for the PVT sensors of
		the Synaptics AS370 SoC

		This driver can also be built as a module. If so, the module
		will be called as370-hwmon.


		config SENSORS_ASC7621
		tristate "Andigilog aSC7621"
		depends on I2C

drivers/hwmon/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -47,6 +47,7 @@ obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
		obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
		obj-$(CONFIG_SENSORS_ARM_SCMI) += scmi-hwmon.o
		obj-$(CONFIG_SENSORS_ARM_SCPI) += scpi-hwmon.o
		obj-$(CONFIG_SENSORS_AS370) += as370-hwmon.o
		obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o
		obj-$(CONFIG_SENSORS_ASPEED) += aspeed-pwm-tacho.o
		obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o

drivers/hwmon/as370-hwmon.c

0 → 100644

+147 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Synaptics AS370 SoC Hardware Monitoring Driver
		*
		* Copyright (C) 2018 Synaptics Incorporated
		* Author: Jisheng Zhang <jszhang@kernel.org>
		*/

		#include <linux/bitops.h>
		#include <linux/hwmon.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/of_device.h>

		#define CTRL 0x0
		#define PD BIT(0)
		#define EN BIT(1)
		#define T_SEL BIT(2)
		#define V_SEL BIT(3)
		#define NMOS_SEL BIT(8)
		#define PMOS_SEL BIT(9)
		#define STS 0x4
		#define BN_MASK GENMASK(11, 0)
		#define EOC BIT(12)

		struct as370_hwmon {
		void __iomem *base;
		};

		static void init_pvt(struct as370_hwmon *hwmon)
		{
		u32 val;
		void __iomem *addr = hwmon->base + CTRL;

		val = PD;
		writel_relaxed(val, addr);
		val \|= T_SEL;
		writel_relaxed(val, addr);
		val \|= EN;
		writel_relaxed(val, addr);
		val &= ~PD;
		writel_relaxed(val, addr);
		}

		static int as370_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
		u32 attr, int channel, long *temp)
		{
		int val;
		struct as370_hwmon *hwmon = dev_get_drvdata(dev);

		switch (attr) {
		case hwmon_temp_input:
		val = readl_relaxed(hwmon->base + STS) & BN_MASK;
		temp = DIV_ROUND_CLOSEST(val 251802, 4096) - 85525;
		break;
		default:
		return -EOPNOTSUPP;
		}

		return 0;
		}

		static umode_t
		as370_hwmon_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 u32 as370_hwmon_temp_config[] = {
		HWMON_T_INPUT,
		0
		};

		static const struct hwmon_channel_info as370_hwmon_temp = {
		.type = hwmon_temp,
		.config = as370_hwmon_temp_config,
		};

		static const struct hwmon_channel_info *as370_hwmon_info[] = {
		&as370_hwmon_temp,
		NULL
		};

		static const struct hwmon_ops as370_hwmon_ops = {
		.is_visible = as370_hwmon_is_visible,
		.read = as370_hwmon_read,
		};

		static const struct hwmon_chip_info as370_chip_info = {
		.ops = &as370_hwmon_ops,
		.info = as370_hwmon_info,
		};

		static int as370_hwmon_probe(struct platform_device *pdev)
		{
		struct resource *res;
		struct device *hwmon_dev;
		struct as370_hwmon *hwmon;
		struct device *dev = &pdev->dev;

		hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL);
		if (!hwmon)
		return -ENOMEM;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		hwmon->base = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(hwmon->base))
		return PTR_ERR(hwmon->base);

		init_pvt(hwmon);

		hwmon_dev = devm_hwmon_device_register_with_info(dev,
		"as370",
		hwmon,
		&as370_chip_info,
		NULL);
		return PTR_ERR_OR_ZERO(hwmon_dev);
		}

		static const struct of_device_id as370_hwmon_match[] = {
		{ .compatible = "syna,as370-hwmon" },
		{},
		};
		MODULE_DEVICE_TABLE(of, as370_hwmon_match);

		static struct platform_driver as370_hwmon_driver = {
		.probe = as370_hwmon_probe,
		.driver = {
		.name = "as370-hwmon",
		.of_match_table = as370_hwmon_match,
		},
		};
		module_platform_driver(as370_hwmon_driver);

		MODULE_AUTHOR("Jisheng Zhang<jszhang@kernel.org>");
		MODULE_DESCRIPTION("Synaptics AS370 SoC hardware monitor");
		MODULE_LICENSE("GPL v2");

Admin message