1 // SPDX-License-Identifier: GPL-2.0-only
3  * SPEAr thermal driver.
5  * Copyright (C) 2011-2012 ST Microelectronics
17 #include <linux/thermal.h>
21 /* SPEAr Thermal Sensor Dev Structure */
23 	/* pointer to base address of the thermal sensor */
27 	/* pointer to thermal flags */
31 static inline int thermal_get_temp(struct thermal_zone_device *thermal,  in thermal_get_temp()  argument
34 	struct spear_thermal_dev *stdev = thermal_zone_device_priv(thermal);  in thermal_get_temp()
40 	*temp = (readl_relaxed(stdev->thermal_base) & 0x7F) * MD_FACTOR;  in thermal_get_temp()
54 	/* Disable SPEAr Thermal Sensor */  in spear_thermal_suspend()
55 	actual_mask = readl_relaxed(stdev->thermal_base);  in spear_thermal_suspend()
56 	writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);  in spear_thermal_suspend()
58 	clk_disable(stdev->clk);  in spear_thermal_suspend()
71 	ret = clk_enable(stdev->clk);  in spear_thermal_resume()
77 	/* Enable SPEAr Thermal Sensor */  in spear_thermal_resume()
78 	actual_mask = readl_relaxed(stdev->thermal_base);  in spear_thermal_resume()
79 	writel_relaxed(actual_mask | stdev->flags, stdev->thermal_base);  in spear_thermal_resume()
93 	struct device_node *np = pdev->dev.of_node;  in spear_thermal_probe()
96 	if (!np || !of_property_read_u32(np, "st,thermal-flags", &val)) {  in spear_thermal_probe()
97 		dev_err(&pdev->dev, "Failed: DT Pdata not passed\n");  in spear_thermal_probe()
98 		return -EINVAL;  in spear_thermal_probe()
101 	stdev = devm_kzalloc(&pdev->dev, sizeof(*stdev), GFP_KERNEL);  in spear_thermal_probe()
103 		return -ENOMEM;  in spear_thermal_probe()
105 	/* Enable thermal sensor */  in spear_thermal_probe()
106 	stdev->thermal_base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in spear_thermal_probe()
107 	if (IS_ERR(stdev->thermal_base))  in spear_thermal_probe()
108 		return PTR_ERR(stdev->thermal_base);  in spear_thermal_probe()
110 	stdev->clk = devm_clk_get(&pdev->dev, NULL);  in spear_thermal_probe()
111 	if (IS_ERR(stdev->clk)) {  in spear_thermal_probe()
112 		dev_err(&pdev->dev, "Can't get clock\n");  in spear_thermal_probe()
113 		return PTR_ERR(stdev->clk);  in spear_thermal_probe()
116 	ret = clk_enable(stdev->clk);  in spear_thermal_probe()
118 		dev_err(&pdev->dev, "Can't enable clock\n");  in spear_thermal_probe()
122 	stdev->flags = val;  in spear_thermal_probe()
123 	writel_relaxed(stdev->flags, stdev->thermal_base);  in spear_thermal_probe()
128 		dev_err(&pdev->dev, "thermal zone device is NULL\n");  in spear_thermal_probe()
134 		dev_err(&pdev->dev, "Cannot enable thermal zone\n");  in spear_thermal_probe()
140 	dev_info(&pdev->dev, "Thermal Sensor Loaded at: 0x%p.\n",  in spear_thermal_probe()
141 			stdev->thermal_base);  in spear_thermal_probe()
148 	clk_disable(stdev->clk);  in spear_thermal_probe()
161 	/* Disable SPEAr Thermal Sensor */  in spear_thermal_exit()
162 	actual_mask = readl_relaxed(stdev->thermal_base);  in spear_thermal_exit()
163 	writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);  in spear_thermal_exit()
165 	clk_disable(stdev->clk);  in spear_thermal_exit()
169 	{ .compatible = "st,thermal-spear1340" },
187 MODULE_DESCRIPTION("SPEAr thermal driver");