1 // SPDX-License-Identifier: GPL-2.0
3  *  R-Car Gen3 THS thermal sensor driver
18 #include <linux/thermal.h>
72 /* Structure for thermal temperature calculation */
82 	struct thermal_zone_device *zone;  member
85 	int id; /* thermal channel id */
97 	return ioread32(tsc->base + reg);  in rcar_gen3_thermal_read()
103 	iowrite32(data, tsc->base + reg);  in rcar_gen3_thermal_write()
109  * [reg] = [temp] * a + b => [temp] = ([reg] - b) / a
132 #define TJ_3 -41
144 	tsc->tj_t = (FIXPT_INT((ptat[1] - ptat[2]) * (ths_tj_1 - TJ_3))  in rcar_gen3_thermal_calc_coefs()
145 		     / (ptat[0] - ptat[2])) + FIXPT_INT(TJ_3);  in rcar_gen3_thermal_calc_coefs()
147 	tsc->coef.a1 = FIXPT_DIV(FIXPT_INT(thcode[1] - thcode[2]),  in rcar_gen3_thermal_calc_coefs()
148 				 tsc->tj_t - FIXPT_INT(TJ_3));  in rcar_gen3_thermal_calc_coefs()
149 	tsc->coef.b1 = FIXPT_INT(thcode[2]) - tsc->coef.a1 * TJ_3;  in rcar_gen3_thermal_calc_coefs()
151 	tsc->coef.a2 = FIXPT_DIV(FIXPT_INT(thcode[1] - thcode[0]),  in rcar_gen3_thermal_calc_coefs()
152 				 tsc->tj_t - FIXPT_INT(ths_tj_1));  in rcar_gen3_thermal_calc_coefs()
153 	tsc->coef.b2 = FIXPT_INT(thcode[0]) - tsc->coef.a2 * ths_tj_1;  in rcar_gen3_thermal_calc_coefs()
161 		-RCAR3_THERMAL_GRAN / 2;  in rcar_gen3_thermal_round()
175 	if (reg <= thcodes[tsc->id][1])  in rcar_gen3_thermal_get_temp()
176 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b1,  in rcar_gen3_thermal_get_temp()
177 				tsc->coef.a1);  in rcar_gen3_thermal_get_temp()
179 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b2,  in rcar_gen3_thermal_get_temp()
180 				tsc->coef.a2);  in rcar_gen3_thermal_get_temp()
183 	/* Guaranteed operating range is -40C to 125C. */  in rcar_gen3_thermal_get_temp()
197 	if (celsius <= INT_FIXPT(tsc->tj_t))  in rcar_gen3_thermal_mcelsius_to_temp()
198 		val = celsius * tsc->coef.a1 + tsc->coef.b1;  in rcar_gen3_thermal_mcelsius_to_temp()
200 		val = celsius * tsc->coef.a2 + tsc->coef.b2;  in rcar_gen3_thermal_mcelsius_to_temp()
211 	low = temperature - MCELSIUS(1);  in rcar_gen3_thermal_update_range()
232 	for (i = 0; i < priv->num_tscs; i++)  in rcar_thermal_irq_set()
233 		rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQMSK, val);  in rcar_thermal_irq_set()
242 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_irq()
243 		status = rcar_gen3_thermal_read(priv->tscs[i], REG_GEN3_IRQSTR);  in rcar_gen3_thermal_irq()
244 		rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQSTR, 0);  in rcar_gen3_thermal_irq()
246 			rcar_gen3_thermal_update_range(priv->tscs[i]);  in rcar_gen3_thermal_irq()
247 			thermal_zone_device_update(priv->tscs[i]->zone,  in rcar_gen3_thermal_irq()
310 		.compatible = "renesas,r8a774a1-thermal",
314 		.compatible = "renesas,r8a774b1-thermal",
318 		.compatible = "renesas,r8a774e1-thermal",
322 		.compatible = "renesas,r8a7795-thermal",
326 		.compatible = "renesas,r8a7796-thermal",
330 		.compatible = "renesas,r8a77961-thermal",
334 		.compatible = "renesas,r8a77965-thermal",
338 		.compatible = "renesas,r8a77980-thermal",
347 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_remove()
360 	struct thermal_zone_device *zone = data;  in rcar_gen3_hwmon_action()  local
362 	thermal_remove_hwmon_sysfs(zone);  in rcar_gen3_hwmon_action()
368 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_probe()
371 	struct thermal_zone_device *zone;  in rcar_gen3_thermal_probe()  local
381 		return -ENOMEM;  in rcar_gen3_thermal_probe()
383 	priv->thermal_init = rcar_gen3_thermal_init;  in rcar_gen3_thermal_probe()
385 		priv->thermal_init = rcar_gen3_thermal_init_r8a7795es1;  in rcar_gen3_thermal_probe()
402 			return -ENOMEM;  in rcar_gen3_thermal_probe()
423 			ret = -ENOMEM;  in rcar_gen3_thermal_probe()
427 		tsc->base = devm_ioremap_resource(dev, res);  in rcar_gen3_thermal_probe()
428 		if (IS_ERR(tsc->base)) {  in rcar_gen3_thermal_probe()
429 			ret = PTR_ERR(tsc->base);  in rcar_gen3_thermal_probe()
432 		tsc->id = i;  in rcar_gen3_thermal_probe()
434 		priv->tscs[i] = tsc;  in rcar_gen3_thermal_probe()
436 		priv->thermal_init(tsc);  in rcar_gen3_thermal_probe()
439 		zone = devm_thermal_zone_of_sensor_register(dev, i, tsc,  in rcar_gen3_thermal_probe()
441 		if (IS_ERR(zone)) {  in rcar_gen3_thermal_probe()
442 			dev_err(dev, "Can't register thermal zone\n");  in rcar_gen3_thermal_probe()
443 			ret = PTR_ERR(zone);  in rcar_gen3_thermal_probe()
446 		tsc->zone = zone;  in rcar_gen3_thermal_probe()
448 		tsc->zone->tzp->no_hwmon = false;  in rcar_gen3_thermal_probe()
449 		ret = thermal_add_hwmon_sysfs(tsc->zone);  in rcar_gen3_thermal_probe()
453 		ret = devm_add_action_or_reset(dev, rcar_gen3_hwmon_action, zone);  in rcar_gen3_thermal_probe()
457 		ret = of_thermal_get_ntrips(tsc->zone);  in rcar_gen3_thermal_probe()
466 	priv->num_tscs = i;  in rcar_gen3_thermal_probe()
468 	if (!priv->num_tscs) {  in rcar_gen3_thermal_probe()
469 		ret = -ENODEV;  in rcar_gen3_thermal_probe()
497 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_resume()
498 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_resume()
500 		priv->thermal_init(tsc);  in rcar_gen3_thermal_resume()
524 MODULE_DESCRIPTION("R-Car Gen3 THS thermal sensor driver");
525 MODULE_AUTHOR("Wolfram Sang <wsa+renesas@sang-engineering.com>");