1 // SPDX-License-Identifier: GPL-2.0
3  *  R-Car Gen3 THS thermal sensor driver
99 	return ioread32(tsc->base + reg);  in rcar_gen3_thermal_read()
105 	iowrite32(data, tsc->base + reg);  in rcar_gen3_thermal_write()
111  * [reg] = [temp] * a + b => [temp] = ([reg] - b) / a
131 #define RCAR3_THERMAL_GRAN 500 /* mili Celsius */
134 #define TJ_3 -41
146 	tsc->tj_t = (FIXPT_INT((ptat[1] - ptat[2]) * (ths_tj_1 - TJ_3))  in rcar_gen3_thermal_calc_coefs()
147 		     / (ptat[0] - ptat[2])) + FIXPT_INT(TJ_3);  in rcar_gen3_thermal_calc_coefs()
149 	tsc->coef.a1 = FIXPT_DIV(FIXPT_INT(thcode[1] - thcode[2]),  in rcar_gen3_thermal_calc_coefs()
150 				 tsc->tj_t - FIXPT_INT(TJ_3));  in rcar_gen3_thermal_calc_coefs()
151 	tsc->coef.b1 = FIXPT_INT(thcode[2]) - tsc->coef.a1 * TJ_3;  in rcar_gen3_thermal_calc_coefs()
153 	tsc->coef.a2 = FIXPT_DIV(FIXPT_INT(thcode[1] - thcode[0]),  in rcar_gen3_thermal_calc_coefs()
154 				 tsc->tj_t - FIXPT_INT(ths_tj_1));  in rcar_gen3_thermal_calc_coefs()
155 	tsc->coef.b2 = FIXPT_INT(thcode[0]) - tsc->coef.a2 * ths_tj_1;  in rcar_gen3_thermal_calc_coefs()
163 		-RCAR3_THERMAL_GRAN / 2;  in rcar_gen3_thermal_round()
174 	/* Read register and convert to mili Celsius */  in rcar_gen3_thermal_get_temp()
177 	if (reg <= thcodes[tsc->id][1])  in rcar_gen3_thermal_get_temp()
178 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b1,  in rcar_gen3_thermal_get_temp()
179 				tsc->coef.a1);  in rcar_gen3_thermal_get_temp()
181 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b2,  in rcar_gen3_thermal_get_temp()
182 				tsc->coef.a2);  in rcar_gen3_thermal_get_temp()
185 	/* Guaranteed operating range is -40C to 125C. */  in rcar_gen3_thermal_get_temp()
196 	int celsius, val;  in rcar_gen3_thermal_mcelsius_to_temp()  local
198 	celsius = DIV_ROUND_CLOSEST(mcelsius, 1000);  in rcar_gen3_thermal_mcelsius_to_temp()
199 	if (celsius <= INT_FIXPT(tsc->tj_t))  in rcar_gen3_thermal_mcelsius_to_temp()
200 		val = celsius * tsc->coef.a1 + tsc->coef.b1;  in rcar_gen3_thermal_mcelsius_to_temp()
202 		val = celsius * tsc->coef.a2 + tsc->coef.b2;  in rcar_gen3_thermal_mcelsius_to_temp()
212 	if (low != -INT_MAX) {  in rcar_gen3_thermal_set_trips()
240 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_irq()
241 		status = rcar_gen3_thermal_read(priv->tscs[i], REG_GEN3_IRQSTR);  in rcar_gen3_thermal_irq()
242 		rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQSTR, 0);  in rcar_gen3_thermal_irq()
244 			thermal_zone_device_update(priv->tscs[i]->zone,  in rcar_gen3_thermal_irq()
267 	if (tsc->zone->ops->set_trips)  in rcar_gen3_thermal_init_r8a7795es1()
295 	if (tsc->zone->ops->set_trips)  in rcar_gen3_thermal_init()
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",
342 		.compatible = "renesas,r8a779a0-thermal",
351 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_remove()
369 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_request_irqs()
382 			return -ENOMEM;  in rcar_gen3_thermal_request_irqs()
397 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_probe()
410 		return -ENOMEM;  in rcar_gen3_thermal_probe()
412 	priv->thermal_init = rcar_gen3_thermal_init;  in rcar_gen3_thermal_probe()
414 		priv->thermal_init = rcar_gen3_thermal_init_r8a7795es1;  in rcar_gen3_thermal_probe()
433 			ret = -ENOMEM;  in rcar_gen3_thermal_probe()
437 		tsc->base = devm_ioremap_resource(dev, res);  in rcar_gen3_thermal_probe()
438 		if (IS_ERR(tsc->base)) {  in rcar_gen3_thermal_probe()
439 			ret = PTR_ERR(tsc->base);  in rcar_gen3_thermal_probe()
442 		tsc->id = i;  in rcar_gen3_thermal_probe()
444 		priv->tscs[i] = tsc;  in rcar_gen3_thermal_probe()
453 		tsc->zone = zone;  in rcar_gen3_thermal_probe()
455 		priv->thermal_init(tsc);  in rcar_gen3_thermal_probe()
458 		tsc->zone->tzp->no_hwmon = false;  in rcar_gen3_thermal_probe()
459 		ret = thermal_add_hwmon_sysfs(tsc->zone);  in rcar_gen3_thermal_probe()
467 		ret = of_thermal_get_ntrips(tsc->zone);  in rcar_gen3_thermal_probe()
474 	priv->num_tscs = i;  in rcar_gen3_thermal_probe()
476 	if (!priv->num_tscs) {  in rcar_gen3_thermal_probe()
477 		ret = -ENODEV;  in rcar_gen3_thermal_probe()
494 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_resume()
495 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_resume()
496 		struct thermal_zone_device *zone = tsc->zone;  in rcar_gen3_thermal_resume()
498 		priv->thermal_init(tsc);  in rcar_gen3_thermal_resume()
499 		if (zone->ops->set_trips)  in rcar_gen3_thermal_resume()
500 			rcar_gen3_thermal_set_trips(tsc, zone->prev_low_trip,  in rcar_gen3_thermal_resume()
501 						    zone->prev_high_trip);  in rcar_gen3_thermal_resume()
522 MODULE_DESCRIPTION("R-Car Gen3 THS thermal sensor driver");
523 MODULE_AUTHOR("Wolfram Sang <wsa+renesas@sang-engineering.com>");