1 // SPDX-License-Identifier: GPL-2.0+
3  * Amlogic Thermal Sensor Driver
10  * U = ---------, Uptat = ---------
13  * Temperature = A * ( Uptat + u_efuse / 2^16 )- B
15  *  A B m n : calibration parameters
16  *  u_efuse : fused calibration value, it's a signed 16 bits value
29 #include <linux/thermal.h>
71  * @A: calibration parameters
72  * @B: calibration parameters
73  * @m: calibration parameters
74  * @n: calibration parameters
76  * This structure is required for configuration of amlogic thermal driver.
87  * @u_efuse_off: register offset to read fused calibration value
88  * @calibration_parameters: calibration parameters structure pointer
90  * This structure is required for configuration of amlogic thermal driver.
116 					pdata->data->calibration_parameters;  in amlogic_thermal_code_to_millicelsius()
120 	uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ?  in amlogic_thermal_code_to_millicelsius()
121 			     ~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 :  in amlogic_thermal_code_to_millicelsius()
122 			     (pdata->trim_info & TSENSOR_TRIM_TEMP_MASK);  in amlogic_thermal_code_to_millicelsius()
124 	factor = param->n * temp_code;  in amlogic_thermal_code_to_millicelsius()
127 	Uptat = temp_code * param->m;  in amlogic_thermal_code_to_millicelsius()
132 	temp = (Uptat + uefuse) * param->A;  in amlogic_thermal_code_to_millicelsius()
134 	temp = (temp - param->B) * 100;  in amlogic_thermal_code_to_millicelsius()
144 	regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off,  in amlogic_thermal_initialize()
145 		    &pdata->trim_info);  in amlogic_thermal_initialize()
147 	ver = TSENSOR_TRIM_VERSION(pdata->trim_info);  in amlogic_thermal_initialize()
150 		ret = -EINVAL;  in amlogic_thermal_initialize()
151 		dev_err(&pdata->pdev->dev,  in amlogic_thermal_initialize()
152 			"tsensor thermal calibration not supported: 0x%x!\n",  in amlogic_thermal_initialize()
163 	ret = clk_prepare_enable(data->clk);  in amlogic_thermal_enable()
167 	regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,  in amlogic_thermal_enable()
175 	regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,  in amlogic_thermal_disable()
177 	clk_disable_unprepare(data->clk);  in amlogic_thermal_disable()
185 	struct amlogic_thermal *pdata = tz->devdata;  in amlogic_thermal_get_temp()
188 		return -EINVAL;  in amlogic_thermal_get_temp()
190 	regmap_read(pdata->regmap, TSENSOR_STAT0, &tval);  in amlogic_thermal_get_temp()
230 		.compatible = "amlogic,g12a-ddr-thermal",
234 		.compatible = "amlogic,g12a-cpu-thermal",
244 	struct device *dev = &pdev->dev;  in amlogic_thermal_probe()
250 		return -ENOMEM;  in amlogic_thermal_probe()
252 	pdata->data = of_device_get_match_data(dev);  in amlogic_thermal_probe()
253 	pdata->pdev = pdev;  in amlogic_thermal_probe()
260 	pdata->regmap = devm_regmap_init_mmio(dev, base,  in amlogic_thermal_probe()
261 					      pdata->data->regmap_config);  in amlogic_thermal_probe()
262 	if (IS_ERR(pdata->regmap))  in amlogic_thermal_probe()
263 		return PTR_ERR(pdata->regmap);  in amlogic_thermal_probe()
265 	pdata->clk = devm_clk_get(dev, NULL);  in amlogic_thermal_probe()
266 	if (IS_ERR(pdata->clk)) {  in amlogic_thermal_probe()
267 		if (PTR_ERR(pdata->clk) != -EPROBE_DEFER)  in amlogic_thermal_probe()
269 		return PTR_ERR(pdata->clk);  in amlogic_thermal_probe()
272 	pdata->sec_ao_map = syscon_regmap_lookup_by_phandle  in amlogic_thermal_probe()
273 		(pdev->dev.of_node, "amlogic,ao-secure");  in amlogic_thermal_probe()
274 	if (IS_ERR(pdata->sec_ao_map)) {  in amlogic_thermal_probe()
276 		return PTR_ERR(pdata->sec_ao_map);  in amlogic_thermal_probe()
279 	pdata->tzd = devm_thermal_of_zone_register(&pdev->dev,  in amlogic_thermal_probe()
283 	if (IS_ERR(pdata->tzd)) {  in amlogic_thermal_probe()
284 		ret = PTR_ERR(pdata->tzd);  in amlogic_thermal_probe()
289 	if (devm_thermal_add_hwmon_sysfs(pdata->tzd))  in amlogic_thermal_probe()
290 		dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n");  in amlogic_thermal_probe()
338 MODULE_DESCRIPTION("Amlogic thermal driver");