1 // SPDX-License-Identifier: GPL-2.0+
3  * Amlogic Thermal Sensor Driver
10  * U = ---------, Uptat = ---------
13  * Temperature = A * ( Uptat + u_efuse / 2^16 )- B
27 #include <linux/thermal.h>
73  * This structure is required for configuration of amlogic thermal driver.
87  * This structure is required for configuration of amlogic thermal driver.
113 					pdata->data->calibration_parameters;  in amlogic_thermal_code_to_millicelsius()
117 	uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ?  in amlogic_thermal_code_to_millicelsius()
118 			     ~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 :  in amlogic_thermal_code_to_millicelsius()
119 			     (pdata->trim_info & TSENSOR_TRIM_TEMP_MASK);  in amlogic_thermal_code_to_millicelsius()
121 	factor = param->n * temp_code;  in amlogic_thermal_code_to_millicelsius()
124 	Uptat = temp_code * param->m;  in amlogic_thermal_code_to_millicelsius()
129 	temp = (Uptat + uefuse) * param->A;  in amlogic_thermal_code_to_millicelsius()
131 	temp = (temp - param->B) * 100;  in amlogic_thermal_code_to_millicelsius()
141 	regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off,  in amlogic_thermal_initialize()
142 		    &pdata->trim_info);  in amlogic_thermal_initialize()
144 	ver = TSENSOR_TRIM_VERSION(pdata->trim_info);  in amlogic_thermal_initialize()
147 		ret = -EINVAL;  in amlogic_thermal_initialize()
148 		dev_err(&pdata->pdev->dev,  in amlogic_thermal_initialize()
149 			"tsensor thermal calibration not supported: 0x%x!\n",  in amlogic_thermal_initialize()
160 	ret = clk_prepare_enable(data->clk);  in amlogic_thermal_enable()
164 	regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,  in amlogic_thermal_enable()
172 	regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,  in amlogic_thermal_disable()
174 	clk_disable_unprepare(data->clk);  in amlogic_thermal_disable()
183 		return -EINVAL;  in amlogic_thermal_get_temp()
185 	regmap_read(pdata->regmap, TSENSOR_STAT0, &tval);  in amlogic_thermal_get_temp()
231 		.compatible = "amlogic,g12a-ddr-thermal",
235 		.compatible = "amlogic,g12a-cpu-thermal",
239 		.compatible = "amlogic,a1-cpu-thermal",
249 	struct device *dev = &pdev->dev;  in amlogic_thermal_probe()
255 		return -ENOMEM;  in amlogic_thermal_probe()
257 	pdata->data = of_device_get_match_data(dev);  in amlogic_thermal_probe()
258 	pdata->pdev = pdev;  in amlogic_thermal_probe()
265 	pdata->regmap = devm_regmap_init_mmio(dev, base,  in amlogic_thermal_probe()
266 					      pdata->data->regmap_config);  in amlogic_thermal_probe()
267 	if (IS_ERR(pdata->regmap))  in amlogic_thermal_probe()
268 		return PTR_ERR(pdata->regmap);  in amlogic_thermal_probe()
270 	pdata->clk = devm_clk_get(dev, NULL);  in amlogic_thermal_probe()
271 	if (IS_ERR(pdata->clk))  in amlogic_thermal_probe()
272 		return dev_err_probe(dev, PTR_ERR(pdata->clk), "failed to get clock\n");  in amlogic_thermal_probe()
274 	pdata->sec_ao_map = syscon_regmap_lookup_by_phandle  in amlogic_thermal_probe()
275 		(pdev->dev.of_node, "amlogic,ao-secure");  in amlogic_thermal_probe()
276 	if (IS_ERR(pdata->sec_ao_map)) {  in amlogic_thermal_probe()
278 		return PTR_ERR(pdata->sec_ao_map);  in amlogic_thermal_probe()
281 	pdata->tzd = devm_thermal_of_zone_register(&pdev->dev,  in amlogic_thermal_probe()
285 	if (IS_ERR(pdata->tzd)) {  in amlogic_thermal_probe()
286 		ret = PTR_ERR(pdata->tzd);  in amlogic_thermal_probe()
291 	devm_thermal_add_hwmon_sysfs(&pdev->dev, pdata->tzd);  in amlogic_thermal_probe()
342 MODULE_DESCRIPTION("Amlogic thermal driver");