1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2015-2017, NVIDIA CORPORATION.  All rights reserved.
13 #include <linux/thermal.h>
17 #include <soc/tegra/bpmp-abi.h>
30 	struct tegra_bpmp_thermal_zone **zones;  member
43 	req.get_temp.zone = zone->idx;  in __tegra_bpmp_thermal_get_temp()
52 	err = tegra_bpmp_transfer(zone->tegra->bpmp, &msg);  in __tegra_bpmp_thermal_get_temp()
55 	if (msg.rx.ret == -BPMP_EFAULT)  in __tegra_bpmp_thermal_get_temp()
56 		return -EAGAIN;  in __tegra_bpmp_thermal_get_temp()
58 		return -EINVAL;  in __tegra_bpmp_thermal_get_temp()
81 	req.set_trip.zone = zone->idx;  in tegra_bpmp_thermal_set_trips()
91 	err = tegra_bpmp_transfer(zone->tegra->bpmp, &msg);  in tegra_bpmp_thermal_set_trips()
95 		return -EINVAL;  in tegra_bpmp_thermal_set_trips()
107 	thermal_zone_device_update(zone->tzd, THERMAL_TRIP_VIOLATED);  in tz_device_update_work_fn()
119 	iosys_map_memcpy_from(&req, &ch->ib, offset, sizeof(req));  in bpmp_mrq_thermal()
122 		dev_err(tegra->dev, "%s: invalid request type: %d\n", __func__, req.type);  in bpmp_mrq_thermal()
123 		tegra_bpmp_mrq_return(ch, -EINVAL, NULL, 0);  in bpmp_mrq_thermal()
127 	for (i = 0; i < tegra->num_zones; ++i) {  in bpmp_mrq_thermal()
128 		if (tegra->zones[i]->idx != req.host_trip_reached.zone)  in bpmp_mrq_thermal()
131 		schedule_work(&tegra->zones[i]->tz_device_update_work);  in bpmp_mrq_thermal()
136 	dev_err(tegra->dev, "%s: invalid thermal zone: %d\n", __func__,  in bpmp_mrq_thermal()
138 	tegra_bpmp_mrq_return(ch, -EINVAL, NULL, 0);  in bpmp_mrq_thermal()
163 		return -EINVAL;  in tegra_bpmp_thermal_get_num_zones()
195 	} else if (msg.rx.ret == -BPMP_ENODEV) {  in tegra_bpmp_thermal_trips_supported()
199 		return -EINVAL;  in tegra_bpmp_thermal_trips_supported()
214 	struct tegra_bpmp *bpmp = dev_get_drvdata(pdev->dev.parent);  in tegra_bpmp_thermal_probe()
224 		dev_err(&pdev->dev, "failed to determine if trip points are supported\n");  in tegra_bpmp_thermal_probe()
233 	tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);  in tegra_bpmp_thermal_probe()
235 		return -ENOMEM;  in tegra_bpmp_thermal_probe()
237 	tegra->dev = &pdev->dev;  in tegra_bpmp_thermal_probe()
238 	tegra->bpmp = bpmp;  in tegra_bpmp_thermal_probe()
242 		dev_err(&pdev->dev, "failed to get the number of zones: %d\n",  in tegra_bpmp_thermal_probe()
247 	tegra->zones = devm_kcalloc(&pdev->dev, max_num_zones,  in tegra_bpmp_thermal_probe()
248 				    sizeof(*tegra->zones), GFP_KERNEL);  in tegra_bpmp_thermal_probe()
249 	if (!tegra->zones)  in tegra_bpmp_thermal_probe()
250 		return -ENOMEM;  in tegra_bpmp_thermal_probe()
256 		zone = devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL);  in tegra_bpmp_thermal_probe()
258 			return -ENOMEM;  in tegra_bpmp_thermal_probe()
260 		zone->idx = i;  in tegra_bpmp_thermal_probe()
261 		zone->tegra = tegra;  in tegra_bpmp_thermal_probe()
267 		 * (-EAGAIN), but will become accessible when the domain is powered on.  in tegra_bpmp_thermal_probe()
269 		if (err < 0 && err != -EAGAIN) {  in tegra_bpmp_thermal_probe()
270 			devm_kfree(&pdev->dev, zone);  in tegra_bpmp_thermal_probe()
275 			&pdev->dev, i, zone, thermal_ops);  in tegra_bpmp_thermal_probe()
277 			if (PTR_ERR(tzd) == -EPROBE_DEFER)  in tegra_bpmp_thermal_probe()
278 				return -EPROBE_DEFER;  in tegra_bpmp_thermal_probe()
279 			devm_kfree(&pdev->dev, zone);  in tegra_bpmp_thermal_probe()
283 		zone->tzd = tzd;  in tegra_bpmp_thermal_probe()
284 		INIT_WORK(&zone->tz_device_update_work,  in tegra_bpmp_thermal_probe()
287 		tegra->zones[tegra->num_zones++] = zone;  in tegra_bpmp_thermal_probe()
293 		dev_err(&pdev->dev, "failed to register mrq handler: %d\n",  in tegra_bpmp_thermal_probe()
307 	tegra_bpmp_free_mrq(tegra->bpmp, MRQ_THERMAL, tegra);  in tegra_bpmp_thermal_remove()
311 	{ .compatible = "nvidia,tegra186-bpmp-thermal" },
320 		.name = "tegra-bpmp-thermal",
327 MODULE_DESCRIPTION("NVIDIA Tegra BPMP thermal sensor driver");