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 */
98 	return ioread32(tsc->base + reg);  in rcar_gen3_thermal_read()
104 	iowrite32(data, tsc->base + reg);  in rcar_gen3_thermal_write()
110  * [reg] = [temp] * a + b => [temp] = ([reg] - b) / a
133 #define TJ_3 -41
145 	tsc->tj_t = (FIXPT_INT((priv->ptat[1] - priv->ptat[2]) * (ths_tj_1 - TJ_3))  in rcar_gen3_thermal_calc_coefs()
146 		     / (priv->ptat[0] - priv->ptat[2])) + FIXPT_INT(TJ_3);  in rcar_gen3_thermal_calc_coefs()
148 	tsc->coef.a1 = FIXPT_DIV(FIXPT_INT(tsc->thcode[1] - tsc->thcode[2]),  in rcar_gen3_thermal_calc_coefs()
149 				 tsc->tj_t - FIXPT_INT(TJ_3));  in rcar_gen3_thermal_calc_coefs()
150 	tsc->coef.b1 = FIXPT_INT(tsc->thcode[2]) - tsc->coef.a1 * TJ_3;  in rcar_gen3_thermal_calc_coefs()
152 	tsc->coef.a2 = FIXPT_DIV(FIXPT_INT(tsc->thcode[1] - tsc->thcode[0]),  in rcar_gen3_thermal_calc_coefs()
153 				 tsc->tj_t - FIXPT_INT(ths_tj_1));  in rcar_gen3_thermal_calc_coefs()
154 	tsc->coef.b2 = FIXPT_INT(tsc->thcode[0]) - tsc->coef.a2 * ths_tj_1;  in rcar_gen3_thermal_calc_coefs()
162 		-RCAR3_THERMAL_GRAN / 2;  in rcar_gen3_thermal_round()
169 	struct rcar_gen3_thermal_tsc *tsc = tz->devdata;  in rcar_gen3_thermal_get_temp()
176 	if (reg <= tsc->thcode[1])  in rcar_gen3_thermal_get_temp()
177 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b1,  in rcar_gen3_thermal_get_temp()
178 				tsc->coef.a1);  in rcar_gen3_thermal_get_temp()
180 		val = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b2,  in rcar_gen3_thermal_get_temp()
181 				tsc->coef.a2);  in rcar_gen3_thermal_get_temp()
184 	/* Guaranteed operating range is -40C to 125C. */  in rcar_gen3_thermal_get_temp()
198 	if (celsius <= INT_FIXPT(tsc->tj_t))  in rcar_gen3_thermal_mcelsius_to_temp()
199 		val = celsius * tsc->coef.a1 + tsc->coef.b1;  in rcar_gen3_thermal_mcelsius_to_temp()
201 		val = celsius * tsc->coef.a2 + tsc->coef.b2;  in rcar_gen3_thermal_mcelsius_to_temp()
208 	struct rcar_gen3_thermal_tsc *tsc = tz->devdata;  in rcar_gen3_thermal_set_trips()
211 	if (low != -INT_MAX) {  in rcar_gen3_thermal_set_trips()
239 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_irq()
240 		status = rcar_gen3_thermal_read(priv->tscs[i], REG_GEN3_IRQSTR);  in rcar_gen3_thermal_irq()
241 		rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQSTR, 0);  in rcar_gen3_thermal_irq()
243 			thermal_zone_device_update(priv->tscs[i]->zone,  in rcar_gen3_thermal_irq()
261 	thscp = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN3_THSCP);  in rcar_gen3_thermal_read_fuses()
272 		priv->ptat[0] = 2631;  in rcar_gen3_thermal_read_fuses()
273 		priv->ptat[1] = 1509;  in rcar_gen3_thermal_read_fuses()
274 		priv->ptat[2] = 435;  in rcar_gen3_thermal_read_fuses()
276 		for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_read_fuses()
277 			struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_read_fuses()
279 			tsc->thcode[0] = thcodes[i][0];  in rcar_gen3_thermal_read_fuses()
280 			tsc->thcode[1] = thcodes[i][1];  in rcar_gen3_thermal_read_fuses()
281 			tsc->thcode[2] = thcodes[i][2];  in rcar_gen3_thermal_read_fuses()
288 	 * Set the pseudo calibration points with fused values.  in rcar_gen3_thermal_read_fuses()
292 	priv->ptat[0] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN3_PTAT1) &  in rcar_gen3_thermal_read_fuses()
294 	priv->ptat[1] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN3_PTAT2) &  in rcar_gen3_thermal_read_fuses()
296 	priv->ptat[2] = rcar_gen3_thermal_read(priv->tscs[0], REG_GEN3_PTAT3) &  in rcar_gen3_thermal_read_fuses()
299 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_read_fuses()
300 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_read_fuses()
302 		tsc->thcode[0] = rcar_gen3_thermal_read(tsc, REG_GEN3_THCODE1) &  in rcar_gen3_thermal_read_fuses()
304 		tsc->thcode[1] = rcar_gen3_thermal_read(tsc, REG_GEN3_THCODE2) &  in rcar_gen3_thermal_read_fuses()
306 		tsc->thcode[2] = rcar_gen3_thermal_read(tsc, REG_GEN3_THCODE3) &  in rcar_gen3_thermal_read_fuses()
324 	if (tsc->zone->ops->set_trips)  in rcar_gen3_thermal_init_r8a7795es1()
352 	if (tsc->zone->ops->set_trips)  in rcar_gen3_thermal_init()
367 		.compatible = "renesas,r8a774a1-thermal",
371 		.compatible = "renesas,r8a774b1-thermal",
375 		.compatible = "renesas,r8a774e1-thermal",
379 		.compatible = "renesas,r8a7795-thermal",
383 		.compatible = "renesas,r8a7796-thermal",
387 		.compatible = "renesas,r8a77961-thermal",
391 		.compatible = "renesas,r8a77965-thermal",
395 		.compatible = "renesas,r8a77980-thermal",
399 		.compatible = "renesas,r8a779a0-thermal",
403 		.compatible = "renesas,r8a779f0-thermal",
412 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_remove()
430 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_request_irqs()
443 			return -ENOMEM;  in rcar_gen3_thermal_request_irqs()
458 	struct device *dev = &pdev->dev;  in rcar_gen3_thermal_probe()
467 		return -ENOMEM;  in rcar_gen3_thermal_probe()
469 	priv->thermal_init = rcar_gen3_thermal_init;  in rcar_gen3_thermal_probe()
471 		priv->thermal_init = rcar_gen3_thermal_init_r8a7795es1;  in rcar_gen3_thermal_probe()
490 			ret = -ENOMEM;  in rcar_gen3_thermal_probe()
494 		tsc->base = devm_ioremap_resource(dev, res);  in rcar_gen3_thermal_probe()
495 		if (IS_ERR(tsc->base)) {  in rcar_gen3_thermal_probe()
496 			ret = PTR_ERR(tsc->base);  in rcar_gen3_thermal_probe()
500 		priv->tscs[i] = tsc;  in rcar_gen3_thermal_probe()
503 	priv->num_tscs = i;  in rcar_gen3_thermal_probe()
506 		dev_info(dev, "No calibration values fused, fallback to driver values\n");  in rcar_gen3_thermal_probe()
508 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_probe()
509 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_probe()
514 			dev_err(dev, "Sensor %u: Can't register thermal zone\n", i);  in rcar_gen3_thermal_probe()
518 		tsc->zone = zone;  in rcar_gen3_thermal_probe()
520 		priv->thermal_init(tsc);  in rcar_gen3_thermal_probe()
523 		tsc->zone->tzp->no_hwmon = false;  in rcar_gen3_thermal_probe()
524 		ret = thermal_add_hwmon_sysfs(tsc->zone);  in rcar_gen3_thermal_probe()
532 		ret = of_thermal_get_ntrips(tsc->zone);  in rcar_gen3_thermal_probe()
539 	if (!priv->num_tscs) {  in rcar_gen3_thermal_probe()
540 		ret = -ENODEV;  in rcar_gen3_thermal_probe()
557 	for (i = 0; i < priv->num_tscs; i++) {  in rcar_gen3_thermal_resume()
558 		struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];  in rcar_gen3_thermal_resume()
559 		struct thermal_zone_device *zone = tsc->zone;  in rcar_gen3_thermal_resume()
561 		priv->thermal_init(tsc);  in rcar_gen3_thermal_resume()
562 		if (zone->ops->set_trips)  in rcar_gen3_thermal_resume()
563 			rcar_gen3_thermal_set_trips(zone, zone->prev_low_trip,  in rcar_gen3_thermal_resume()
564 						    zone->prev_high_trip);  in rcar_gen3_thermal_resume()
585 MODULE_DESCRIPTION("R-Car Gen3 THS thermal sensor driver");
586 MODULE_AUTHOR("Wolfram Sang <wsa+renesas@sang-engineering.com>");