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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/thermal/broadcom/brcmstb_thermal.c
....@@ -1,17 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Broadcom STB AVS TMON thermal sensor driver
34  *
45  * Copyright (c) 2015-2017 Broadcom
5
- *
6
- * This software is licensed under the terms of the GNU General Public
7
- * License version 2, as published by the Free Software Foundation, and
8
- * may be copied, distributed, and modified under those terms.
9
- *
10
- * This program is distributed in the hope that it will be useful,
11
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
- * GNU General Public License for more details.
14
- *
156  */
167 
178 #define DRV_NAME	"brcmstb_thermal"
....@@ -111,18 +102,28 @@
111102 	},
112103 };
113104 
105
+struct brcmstb_thermal_params {
106
+	unsigned int offset;
107
+	unsigned int mult;
108
+	const struct thermal_zone_of_device_ops *of_ops;
109
+};
110
+
114111 struct brcmstb_thermal_priv {
115112 	void __iomem *tmon_base;
116113 	struct device *dev;
117114 	struct thermal_zone_device *thermal;
115
+	/* Process specific thermal parameters used for calculations */
116
+	const struct brcmstb_thermal_params *temp_params;
118117 };
119118 
120119 /* Convert a HW code to a temperature reading (millidegree celsius) */
121
-static inline int avs_tmon_code_to_temp(struct thermal_zone_device *tz,
120
+static inline int avs_tmon_code_to_temp(struct brcmstb_thermal_priv *priv,
122121 					u32 code)
123122 {
124
-	return (AVS_TMON_TEMP_OFFSET -
125
-		(int)((code & AVS_TMON_TEMP_MAX) * AVS_TMON_TEMP_SLOPE));
123
+	int offset = priv->temp_params->offset;
124
+	int mult = priv->temp_params->mult;
125
+
126
+	return (offset - (int)((code & AVS_TMON_TEMP_MASK) * mult));
126127 }
127128 
128129 /*
....@@ -131,21 +132,22 @@
131132  * @temp: temperature to convert
132133  * @low: if true, round toward the low side
133134  */
134
-static inline u32 avs_tmon_temp_to_code(struct thermal_zone_device *tz,
135
+static inline u32 avs_tmon_temp_to_code(struct brcmstb_thermal_priv *priv,
135136 					int temp, bool low)
136137 {
138
+	int offset = priv->temp_params->offset;
139
+	int mult = priv->temp_params->mult;
140
+
137141 	if (temp < AVS_TMON_TEMP_MIN)
138142 		return AVS_TMON_TEMP_MAX;	/* Maximum code value */
139143 
140
-	if (temp >= AVS_TMON_TEMP_OFFSET)
144
+	if (temp >= offset)
141145 		return 0;	/* Minimum code value */
142146 
143147 	if (low)
144
-		return (u32)(DIV_ROUND_UP(AVS_TMON_TEMP_OFFSET - temp,
145
-					  AVS_TMON_TEMP_SLOPE));
148
+		return (u32)(DIV_ROUND_UP(offset - temp, mult));
146149 	else
147
-		return (u32)((AVS_TMON_TEMP_OFFSET - temp) /
148
-			      AVS_TMON_TEMP_SLOPE);
150
+		return (u32)((offset - temp) / mult);
149151 }
150152 
151153 static int brcmstb_get_temp(void *data, int *temp)
....@@ -163,7 +165,7 @@
163165 
164166 	val = (val & AVS_TMON_STATUS_data_msk) >> AVS_TMON_STATUS_data_shift;
165167 
166
-	t = avs_tmon_code_to_temp(priv->thermal, val);
168
+	t = avs_tmon_code_to_temp(priv, val);
167169 	if (t < 0)
168170 		*temp = 0;
169171 	else
....@@ -197,7 +199,7 @@
197199 	val &= trip->reg_msk;
198200 	val >>= trip->reg_shift;
199201 
200
-	return avs_tmon_code_to_temp(priv->thermal, val);
202
+	return avs_tmon_code_to_temp(priv, val);
201203 }
202204 
203205 static void avs_tmon_set_trip_temp(struct brcmstb_thermal_priv *priv,
....@@ -210,7 +212,7 @@
210212 	dev_dbg(priv->dev, "set temp %d to %d\n", type, temp);
211213 
212214 	/* round toward low temp for the low interrupt */
213
-	val = avs_tmon_temp_to_code(priv->thermal, temp,
215
+	val = avs_tmon_temp_to_code(priv, temp,
214216 				    type == TMON_TRIP_TYPE_LOW);
215217 
216218 	val <<= trip->reg_shift;
....@@ -227,7 +229,7 @@
227229 	u32 val;
228230 
229231 	val = __raw_readl(priv->tmon_base + AVS_TMON_TEMP_INT_CODE);
230
-	return avs_tmon_code_to_temp(priv->thermal, val);
232
+	return avs_tmon_code_to_temp(priv, val);
231233 }
232234 
233235 static irqreturn_t brcmstb_tmon_irq_thread(int irq, void *data)
....@@ -286,19 +288,37 @@
286288 	return 0;
287289 }
288290 
289
-static struct thermal_zone_of_device_ops of_ops = {
291
+static const struct thermal_zone_of_device_ops brcmstb_16nm_of_ops = {
292
+	.get_temp	= brcmstb_get_temp,
293
+};
294
+
295
+static const struct brcmstb_thermal_params brcmstb_16nm_params = {
296
+	.offset	= 457829,
297
+	.mult	= 557,
298
+	.of_ops	= &brcmstb_16nm_of_ops,
299
+};
300
+
301
+static const struct thermal_zone_of_device_ops brcmstb_28nm_of_ops = {
290302 	.get_temp	= brcmstb_get_temp,
291303 	.set_trips	= brcmstb_set_trips,
292304 };
293305 
306
+static const struct brcmstb_thermal_params brcmstb_28nm_params = {
307
+	.offset	= 410040,
308
+	.mult	= 487,
309
+	.of_ops	= &brcmstb_28nm_of_ops,
310
+};
311
+
294312 static const struct of_device_id brcmstb_thermal_id_table[] = {
295
-	{ .compatible = "brcm,avs-tmon" },
313
+	{ .compatible = "brcm,avs-tmon-bcm7216", .data = &brcmstb_16nm_params },
314
+	{ .compatible = "brcm,avs-tmon", .data = &brcmstb_28nm_params },
296315 	{},
297316 };
298317 MODULE_DEVICE_TABLE(of, brcmstb_thermal_id_table);
299318 
300319 static int brcmstb_thermal_probe(struct platform_device *pdev)
301320 {
321
+	const struct thermal_zone_of_device_ops *of_ops;
302322 	struct thermal_zone_device *thermal;
303323 	struct brcmstb_thermal_priv *priv;
304324 	struct resource *res;
....@@ -308,6 +328,10 @@
308328 	if (!priv)
309329 		return -ENOMEM;
310330 
331
+	priv->temp_params = of_device_get_match_data(&pdev->dev);
332
+	if (!priv->temp_params)
333
+		return -EINVAL;
334
+
311335 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
312336 	priv->tmon_base = devm_ioremap_resource(&pdev->dev, res);
313337 	if (IS_ERR(priv->tmon_base))
....@@ -315,8 +339,10 @@
315339 
316340 	priv->dev = &pdev->dev;
317341 	platform_set_drvdata(pdev, priv);
342
+	of_ops = priv->temp_params->of_ops;
318343 
319
-	thermal = thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &of_ops);
344
+	thermal = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv,
345
+						       of_ops);
320346 	if (IS_ERR(thermal)) {
321347 		ret = PTR_ERR(thermal);
322348 		dev_err(&pdev->dev, "could not register sensor: %d\n", ret);
....@@ -326,42 +352,24 @@
326352 	priv->thermal = thermal;
327353 
328354 	irq = platform_get_irq(pdev, 0);
329
-	if (irq < 0) {
330
-		dev_err(&pdev->dev, "could not get IRQ\n");
331
-		ret = irq;
332
-		goto err;
333
-	}
334
-	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
335
-					brcmstb_tmon_irq_thread, IRQF_ONESHOT,
336
-					DRV_NAME, priv);
337
-	if (ret < 0) {
338
-		dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
339
-		goto err;
355
+	if (irq >= 0) {
356
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
357
+						brcmstb_tmon_irq_thread,
358
+						IRQF_ONESHOT,
359
+						DRV_NAME, priv);
360
+		if (ret < 0) {
361
+			dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
362
+			return ret;
363
+		}
340364 	}
341365 
342366 	dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n");
343
-
344
-	return 0;
345
-
346
-err:
347
-	thermal_zone_of_sensor_unregister(&pdev->dev, thermal);
348
-	return ret;
349
-}
350
-
351
-static int brcmstb_thermal_exit(struct platform_device *pdev)
352
-{
353
-	struct brcmstb_thermal_priv *priv = platform_get_drvdata(pdev);
354
-	struct thermal_zone_device *thermal = priv->thermal;
355
-
356
-	if (thermal)
357
-		thermal_zone_of_sensor_unregister(&pdev->dev, priv->thermal);
358367 
359368 	return 0;
360369 }
361370 
362371 static struct platform_driver brcmstb_thermal_driver = {
363372 	.probe = brcmstb_thermal_probe,
364
-	.remove = brcmstb_thermal_exit,
365373 	.driver = {
366374 		.name = DRV_NAME,
367375 		.of_match_table = brcmstb_thermal_id_table,