1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * db8500_thermal.c - DB8500 Thermal Management Implementation
5  * Copyright (C) 2012 ST-Ericsson
6  * Copyright (C) 2012-2019 Linaro Ltd.
13 #include <linux/mfd/dbx500-prcmu.h>
24  * db8500_thermal_points - the interpolation points that trigger
67 	 * TODO: There is no PRCMU interface to get temperature data currently,  in db8500_thermal_get_temp()
69 	 * and this will be fixed when the PRCMU interface is available.  in db8500_thermal_get_temp()
71 	*temp = th->interpolated_temp;  in db8500_thermal_get_temp()
81 	*trend = th->trend;  in db8500_thermal_get_trend()
99 	th->cur_index = idx;  in db8500_thermal_update_config()
100 	th->interpolated_temp = (next_low + next_high)/2;  in db8500_thermal_update_config()
101 	th->trend = trend;  in db8500_thermal_update_config()
104 	 * The PRCMU accept absolute temperatures in celsius so divide  in db8500_thermal_update_config()
114 	unsigned int idx = th->cur_index;  in prcmu_low_irq_handler()
125 		next_high = db8500_thermal_points[idx - 1];  in prcmu_low_irq_handler()
126 		next_low = db8500_thermal_points[idx - 2];  in prcmu_low_irq_handler()
128 	idx -= 1;  in prcmu_low_irq_handler()
132 	dev_dbg(&th->tz->device,  in prcmu_low_irq_handler()
133 		"PRCMU set max %ld, min %ld\n", next_high, next_low);  in prcmu_low_irq_handler()
135 	thermal_zone_device_update(th->tz, THERMAL_EVENT_UNSPECIFIED);  in prcmu_low_irq_handler()
143 	unsigned int idx = th->cur_index;  in prcmu_high_irq_handler()
147 	if (idx < num_points - 1) {  in prcmu_high_irq_handler()
155 		dev_dbg(&th->tz->device,  in prcmu_high_irq_handler()
156 			"PRCMU set max %ld, min %ld\n", next_high, next_low);  in prcmu_high_irq_handler()
157 	} else if (idx == num_points - 1)  in prcmu_high_irq_handler()
159 		th->interpolated_temp = db8500_thermal_points[idx] + 1;  in prcmu_high_irq_handler()
161 	thermal_zone_device_update(th->tz, THERMAL_EVENT_UNSPECIFIED);  in prcmu_high_irq_handler()
169 	struct device *dev = &pdev->dev;  in db8500_thermal_probe()
174 		return -ENOMEM;  in db8500_thermal_probe()
205 	th->tz = devm_thermal_zone_of_sensor_register(dev, 0, th, &thdev_ops);  in db8500_thermal_probe()
206 	if (IS_ERR(th->tz)) {  in db8500_thermal_probe()
208 		return PTR_ERR(th->tz);  in db8500_thermal_probe()
243 	{ .compatible = "stericsson,db8500-thermal" },
250 		.name = "db8500-thermal",
261 MODULE_DESCRIPTION("DB8500 thermal driver");