thermal/drivers/hisi: Use devm_platform_ioremap_resource()
[linux-block.git] / drivers / thermal / kirkwood_thermal.c
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9c92ab61 1// SPDX-License-Identifier: GPL-2.0-only
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2/*
3 * Kirkwood thermal sensor driver
4 *
5 * Copyright (C) 2012 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
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6 */
7#include <linux/device.h>
8#include <linux/err.h>
9#include <linux/io.h>
10#include <linux/kernel.h>
11#include <linux/of.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/thermal.h>
15
16#define KIRKWOOD_THERMAL_VALID_OFFSET 9
17#define KIRKWOOD_THERMAL_VALID_MASK 0x1
18#define KIRKWOOD_THERMAL_TEMP_OFFSET 10
19#define KIRKWOOD_THERMAL_TEMP_MASK 0x1FF
20
21/* Kirkwood Thermal Sensor Dev Structure */
22struct kirkwood_thermal_priv {
23 void __iomem *sensor;
24};
25
26static int kirkwood_get_temp(struct thermal_zone_device *thermal,
17e8351a 27 int *temp)
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28{
29 unsigned long reg;
5f68d078 30 struct kirkwood_thermal_priv *priv = thermal_zone_device_priv(thermal);
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31
32 reg = readl_relaxed(priv->sensor);
33
34 /* Valid check */
02519d33 35 if (!((reg >> KIRKWOOD_THERMAL_VALID_OFFSET) &
abda7383 36 KIRKWOOD_THERMAL_VALID_MASK))
7060aa36 37 return -EIO;
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38
39 /*
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40 * Calculate temperature. According to Marvell internal
41 * documentation the formula for this is:
42 * Celsius = (322-reg)/1.3625
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43 */
44 reg = (reg >> KIRKWOOD_THERMAL_TEMP_OFFSET) &
45 KIRKWOOD_THERMAL_TEMP_MASK;
696b6075 46 *temp = ((3220000000UL - (10000000UL * reg)) / 13625);
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47
48 return 0;
49}
50
51static struct thermal_zone_device_ops ops = {
52 .get_temp = kirkwood_get_temp,
53};
54
55static const struct of_device_id kirkwood_thermal_id_table[] = {
56 { .compatible = "marvell,kirkwood-thermal" },
57 {}
58};
59
60static int kirkwood_thermal_probe(struct platform_device *pdev)
61{
62 struct thermal_zone_device *thermal = NULL;
63 struct kirkwood_thermal_priv *priv;
bbcf90c0 64 int ret;
7060aa36 65
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66 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
67 if (!priv)
68 return -ENOMEM;
69
821e4309 70 priv->sensor = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
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71 if (IS_ERR(priv->sensor))
72 return PTR_ERR(priv->sensor);
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73
74 thermal = thermal_zone_device_register("kirkwood_thermal", 0, 0,
75 priv, &ops, NULL, 0, 0);
76 if (IS_ERR(thermal)) {
77 dev_err(&pdev->dev,
78 "Failed to register thermal zone device\n");
79 return PTR_ERR(thermal);
80 }
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81 ret = thermal_zone_device_enable(thermal);
82 if (ret) {
83 thermal_zone_device_unregister(thermal);
84 dev_err(&pdev->dev, "Failed to enable thermal zone device\n");
85 return ret;
86 }
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87
88 platform_set_drvdata(pdev, thermal);
89
90 return 0;
91}
92
93static int kirkwood_thermal_exit(struct platform_device *pdev)
94{
95 struct thermal_zone_device *kirkwood_thermal =
96 platform_get_drvdata(pdev);
97
98 thermal_zone_device_unregister(kirkwood_thermal);
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99
100 return 0;
101}
102
103MODULE_DEVICE_TABLE(of, kirkwood_thermal_id_table);
104
105static struct platform_driver kirkwood_thermal_driver = {
106 .probe = kirkwood_thermal_probe,
107 .remove = kirkwood_thermal_exit,
108 .driver = {
109 .name = "kirkwood_thermal",
90c3194e 110 .of_match_table = kirkwood_thermal_id_table,
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111 },
112};
113
114module_platform_driver(kirkwood_thermal_driver);
115
116MODULE_AUTHOR("Nobuhiro Iwamatsu <iwamatsu@nigauri.org>");
117MODULE_DESCRIPTION("kirkwood thermal driver");
118MODULE_LICENSE("GPL");