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39f034386f
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230714174607.4057185-1-robh@kernel.org Signed-off-by: Guenter Roeck <linux@roeck-us.net>
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Synaptics AS370 SoC Hardware Monitoring Driver
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*
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* Copyright (C) 2018 Synaptics Incorporated
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* Author: Jisheng Zhang <jszhang@kernel.org>
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*/
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#include <linux/bitops.h>
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#include <linux/hwmon.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#define CTRL 0x0
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#define PD BIT(0)
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#define EN BIT(1)
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#define T_SEL BIT(2)
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#define V_SEL BIT(3)
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#define NMOS_SEL BIT(8)
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#define PMOS_SEL BIT(9)
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#define STS 0x4
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#define BN_MASK GENMASK(11, 0)
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#define EOC BIT(12)
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struct as370_hwmon {
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void __iomem *base;
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};
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static void init_pvt(struct as370_hwmon *hwmon)
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{
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u32 val;
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void __iomem *addr = hwmon->base + CTRL;
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val = PD;
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writel_relaxed(val, addr);
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val |= T_SEL;
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writel_relaxed(val, addr);
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val |= EN;
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writel_relaxed(val, addr);
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val &= ~PD;
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writel_relaxed(val, addr);
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}
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static int as370_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *temp)
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{
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int val;
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struct as370_hwmon *hwmon = dev_get_drvdata(dev);
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switch (attr) {
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case hwmon_temp_input:
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val = readl_relaxed(hwmon->base + STS) & BN_MASK;
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*temp = DIV_ROUND_CLOSEST(val * 251802, 4096) - 85525;
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static umode_t
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as370_hwmon_is_visible(const void *data, enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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if (type != hwmon_temp)
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return 0;
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switch (attr) {
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case hwmon_temp_input:
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return 0444;
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default:
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return 0;
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}
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}
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static const struct hwmon_channel_info * const as370_hwmon_info[] = {
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HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
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NULL
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};
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static const struct hwmon_ops as370_hwmon_ops = {
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.is_visible = as370_hwmon_is_visible,
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.read = as370_hwmon_read,
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};
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static const struct hwmon_chip_info as370_chip_info = {
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.ops = &as370_hwmon_ops,
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.info = as370_hwmon_info,
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};
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static int as370_hwmon_probe(struct platform_device *pdev)
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{
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struct device *hwmon_dev;
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struct as370_hwmon *hwmon;
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struct device *dev = &pdev->dev;
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hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL);
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if (!hwmon)
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return -ENOMEM;
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hwmon->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(hwmon->base))
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return PTR_ERR(hwmon->base);
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init_pvt(hwmon);
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hwmon_dev = devm_hwmon_device_register_with_info(dev,
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"as370",
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hwmon,
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&as370_chip_info,
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NULL);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static const struct of_device_id as370_hwmon_match[] = {
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{ .compatible = "syna,as370-hwmon" },
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{},
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};
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MODULE_DEVICE_TABLE(of, as370_hwmon_match);
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static struct platform_driver as370_hwmon_driver = {
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.probe = as370_hwmon_probe,
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.driver = {
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.name = "as370-hwmon",
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.of_match_table = as370_hwmon_match,
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},
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};
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module_platform_driver(as370_hwmon_driver);
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MODULE_AUTHOR("Jisheng Zhang<jszhang@kernel.org>");
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MODULE_DESCRIPTION("Synaptics AS370 SoC hardware monitor");
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MODULE_LICENSE("GPL v2");
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