1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2015-2017 Broadcom
55 /* HW related temperature constants */
57 #define AVS_TMON_TEMP_MIN		-88161
72 	/* HW field to read the trip temperature */
79 	/* Trips when temperature is below threshold */
87 	/* Trips when temperature is above threshold */
95 	/* Automatically resets chip when above threshold */
119 /* Convert a HW code to a temperature reading (millidegree celsius) */
123 	int offset = priv->temp_params->offset;  in avs_tmon_code_to_temp()
124 	int mult = priv->temp_params->mult;  in avs_tmon_code_to_temp()
126 	return (offset - (int)((code & AVS_TMON_TEMP_MASK) * mult));  in avs_tmon_code_to_temp()
130  * Convert a temperature value (millidegree celsius) to a HW code
132  * @temp: temperature to convert
138 	int offset = priv->temp_params->offset;  in avs_tmon_temp_to_code()
139 	int mult = priv->temp_params->mult;  in avs_tmon_temp_to_code()
148 		return (u32)(DIV_ROUND_UP(offset - temp, mult));  in avs_tmon_temp_to_code()
150 		return (u32)((offset - temp) / mult);  in avs_tmon_temp_to_code()
155 	struct brcmstb_thermal_priv *priv = tz->devdata;  in brcmstb_get_temp()
159 	val = __raw_readl(priv->tmon_base + AVS_TMON_STATUS);  in brcmstb_get_temp()
162 		dev_err(priv->dev, "reading not valid\n");  in brcmstb_get_temp()
163 		return -EIO;  in brcmstb_get_temp()
181 	u32 val = __raw_readl(priv->tmon_base + trip->enable_offs);  in avs_tmon_trip_enable()
183 	dev_dbg(priv->dev, "%sable trip, type %d\n", en ? "en" : "dis", type);  in avs_tmon_trip_enable()
186 		val |= trip->enable_mask;  in avs_tmon_trip_enable()
188 		val &= ~trip->enable_mask;  in avs_tmon_trip_enable()
190 	__raw_writel(val, priv->tmon_base + trip->enable_offs);  in avs_tmon_trip_enable()
197 	u32 val = __raw_readl(priv->tmon_base + trip->reg_offs);  in avs_tmon_get_trip_temp()
199 	val &= trip->reg_msk;  in avs_tmon_get_trip_temp()
200 	val >>= trip->reg_shift;  in avs_tmon_get_trip_temp()
212 	dev_dbg(priv->dev, "set temp %d to %d\n", type, temp);  in avs_tmon_set_trip_temp()
218 	val <<= trip->reg_shift;  in avs_tmon_set_trip_temp()
219 	val &= trip->reg_msk;  in avs_tmon_set_trip_temp()
221 	orig = __raw_readl(priv->tmon_base + trip->reg_offs);  in avs_tmon_set_trip_temp()
222 	orig &= ~trip->reg_msk;  in avs_tmon_set_trip_temp()
224 	__raw_writel(orig, priv->tmon_base + trip->reg_offs);  in avs_tmon_set_trip_temp()
231 	val = __raw_readl(priv->tmon_base + AVS_TMON_TEMP_INT_CODE);  in avs_tmon_get_intr_temp()
244 	dev_dbg(priv->dev, "low/intr/high: %d/%d/%d\n",  in brcmstb_tmon_irq_thread()
247 	/* Disable high-temp until next threshold shift */  in brcmstb_tmon_irq_thread()
250 	/* Disable low-temp until next threshold shift */  in brcmstb_tmon_irq_thread()
255 	 * Notify using the interrupt temperature, in case the temperature  in brcmstb_tmon_irq_thread()
258 	thermal_zone_device_update(priv->thermal, intr);  in brcmstb_tmon_irq_thread()
265 	struct brcmstb_thermal_priv *priv = tz->devdata;  in brcmstb_set_trips()
267 	dev_dbg(priv->dev, "set trips %d <--> %d\n", low, high);  in brcmstb_set_trips()
270 	 * Disable low-temp if "low" is too small. As per thermal framework  in brcmstb_set_trips()
271 	 * API, we use -INT_MAX rather than INT_MIN.  in brcmstb_set_trips()
273 	if (low <= -INT_MAX) {  in brcmstb_set_trips()
280 	/* Disable high-temp if "high" is too big. */  in brcmstb_set_trips()
313 	{ .compatible = "brcm,avs-tmon-bcm7216", .data = &brcmstb_16nm_params },
314 	{ .compatible = "brcm,avs-tmon", .data = &brcmstb_28nm_params },
327 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in brcmstb_thermal_probe()
329 		return -ENOMEM;  in brcmstb_thermal_probe()
331 	priv->temp_params = of_device_get_match_data(&pdev->dev);  in brcmstb_thermal_probe()
332 	if (!priv->temp_params)  in brcmstb_thermal_probe()
333 		return -EINVAL;  in brcmstb_thermal_probe()
336 	priv->tmon_base = devm_ioremap_resource(&pdev->dev, res);  in brcmstb_thermal_probe()
337 	if (IS_ERR(priv->tmon_base))  in brcmstb_thermal_probe()
338 		return PTR_ERR(priv->tmon_base);  in brcmstb_thermal_probe()
340 	priv->dev = &pdev->dev;  in brcmstb_thermal_probe()
342 	of_ops = priv->temp_params->of_ops;  in brcmstb_thermal_probe()
344 	thermal = devm_thermal_of_zone_register(&pdev->dev, 0, priv,  in brcmstb_thermal_probe()
348 		dev_err(&pdev->dev, "could not register sensor: %d\n", ret);  in brcmstb_thermal_probe()
352 	priv->thermal = thermal;  in brcmstb_thermal_probe()
356 		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,  in brcmstb_thermal_probe()
361 			dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);  in brcmstb_thermal_probe()
366 	dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n");  in brcmstb_thermal_probe()