| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Guillaume La Roque | 1211 | 99.92% | 1 | 50.00% |
| Amit Kucheria | 1 | 0.08% | 1 | 50.00% |
| Total | 1212 | 2 |
// SPDX-License-Identifier: GPL-2.0+ /* * Amlogic Thermal Sensor Driver * * Copyright (C) 2017 Huan Biao <huan.biao@amlogic.com> * Copyright (C) 2019 Guillaume La Roque <glaroque@baylibre.com> * * Register value to celsius temperature formulas: * Read_Val m * U * U = ---------, Uptat = --------- * 2^16 1 + n * U * * Temperature = A * ( Uptat + u_efuse / 2^16 )- B * * A B m n : calibration parameters * u_efuse : fused calibration value, it's a signed 16 bits value */ #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/thermal.h> #include "thermal_core.h" #define TSENSOR_CFG_REG1 0x4 #define TSENSOR_CFG_REG1_RSET_VBG BIT(12) #define TSENSOR_CFG_REG1_RSET_ADC BIT(11) #define TSENSOR_CFG_REG1_VCM_EN BIT(10) #define TSENSOR_CFG_REG1_VBG_EN BIT(9) #define TSENSOR_CFG_REG1_OUT_CTL BIT(6) #define TSENSOR_CFG_REG1_FILTER_EN BIT(5) #define TSENSOR_CFG_REG1_DEM_EN BIT(3) #define TSENSOR_CFG_REG1_CH_SEL GENMASK(1, 0) #define TSENSOR_CFG_REG1_ENABLE \ (TSENSOR_CFG_REG1_FILTER_EN | \ TSENSOR_CFG_REG1_VCM_EN | \ TSENSOR_CFG_REG1_VBG_EN | \ TSENSOR_CFG_REG1_DEM_EN | \ TSENSOR_CFG_REG1_CH_SEL) #define TSENSOR_STAT0 0x40 #define TSENSOR_STAT9 0x64 #define TSENSOR_READ_TEMP_MASK GENMASK(15, 0) #define TSENSOR_TEMP_MASK GENMASK(11, 0) #define TSENSOR_TRIM_SIGN_MASK BIT(15) #define TSENSOR_TRIM_TEMP_MASK GENMASK(14, 0) #define TSENSOR_TRIM_VERSION_MASK GENMASK(31, 24) #define TSENSOR_TRIM_VERSION(_version) \ FIELD_GET(TSENSOR_TRIM_VERSION_MASK, _version) #define TSENSOR_TRIM_CALIB_VALID_MASK (GENMASK(3, 2) | BIT(7)) #define TSENSOR_CALIB_OFFSET 1 #define TSENSOR_CALIB_SHIFT 4 /** * struct amlogic_thermal_soc_calib_data * @A: calibration parameters * @B: calibration parameters * @m: calibration parameters * @n: calibration parameters * * This structure is required for configuration of amlogic thermal driver. */ struct amlogic_thermal_soc_calib_data { int A; int B; int m; int n; }; /** * struct amlogic_thermal_data * @u_efuse_off: register offset to read fused calibration value * @calibration_parameters: calibration parameters structure pointer * @regmap_config: regmap config for the device * This structure is required for configuration of amlogic thermal driver. */ struct amlogic_thermal_data { int u_efuse_off; const struct amlogic_thermal_soc_calib_data *calibration_parameters; const struct regmap_config *regmap_config; }; struct amlogic_thermal { struct platform_device *pdev; const struct amlogic_thermal_data *data; struct regmap *regmap; struct regmap *sec_ao_map; struct clk *clk; struct thermal_zone_device *tzd; u32 trim_info; }; /* * Calculate a temperature value from a temperature code. * The unit of the temperature is degree milliCelsius. */ static int amlogic_thermal_code_to_millicelsius(struct amlogic_thermal *pdata, int temp_code) { const struct amlogic_thermal_soc_calib_data *param = pdata->data->calibration_parameters; int temp; s64 factor, Uptat, uefuse; uefuse = pdata->trim_info & TSENSOR_TRIM_SIGN_MASK ? ~(pdata->trim_info & TSENSOR_TRIM_TEMP_MASK) + 1 : (pdata->trim_info & TSENSOR_TRIM_TEMP_MASK); factor = param->n * temp_code; factor = div_s64(factor, 100); Uptat = temp_code * param->m; Uptat = div_s64(Uptat, 100); Uptat = Uptat * BIT(16); Uptat = div_s64(Uptat, BIT(16) + factor); temp = (Uptat + uefuse) * param->A; temp = div_s64(temp, BIT(16)); temp = (temp - param->B) * 100; return temp; } static int amlogic_thermal_initialize(struct amlogic_thermal *pdata) { int ret = 0; int ver; regmap_read(pdata->sec_ao_map, pdata->data->u_efuse_off, &pdata->trim_info); ver = TSENSOR_TRIM_VERSION(pdata->trim_info); if ((ver & TSENSOR_TRIM_CALIB_VALID_MASK) == 0) { ret = -EINVAL; dev_err(&pdata->pdev->dev, "tsensor thermal calibration not supported: 0x%x!\n", ver); } return ret; } static int amlogic_thermal_enable(struct amlogic_thermal *data) { int ret; ret = clk_prepare_enable(data->clk); if (ret) return ret; regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, TSENSOR_CFG_REG1_ENABLE, TSENSOR_CFG_REG1_ENABLE); return 0; } static int amlogic_thermal_disable(struct amlogic_thermal *data) { regmap_update_bits(data->regmap, TSENSOR_CFG_REG1, TSENSOR_CFG_REG1_ENABLE, 0); clk_disable_unprepare(data->clk); return 0; } static int amlogic_thermal_get_temp(void *data, int *temp) { unsigned int tval; struct amlogic_thermal *pdata = data; if (!data) return -EINVAL; regmap_read(pdata->regmap, TSENSOR_STAT0, &tval); *temp = amlogic_thermal_code_to_millicelsius(pdata, tval & TSENSOR_READ_TEMP_MASK); return 0; } static const struct thermal_zone_of_device_ops amlogic_thermal_ops = { .get_temp = amlogic_thermal_get_temp, }; static const struct regmap_config amlogic_thermal_regmap_config_g12a = { .reg_bits = 8, .val_bits = 32, .reg_stride = 4, .max_register = TSENSOR_STAT9, }; static const struct amlogic_thermal_soc_calib_data amlogic_thermal_g12a = { .A = 9411, .B = 3159, .m = 424, .n = 324, }; static const struct amlogic_thermal_data amlogic_thermal_g12a_cpu_param = { .u_efuse_off = 0x128, .calibration_parameters = &amlogic_thermal_g12a, .regmap_config = &amlogic_thermal_regmap_config_g12a, }; static const struct amlogic_thermal_data amlogic_thermal_g12a_ddr_param = { .u_efuse_off = 0xf0, .calibration_parameters = &amlogic_thermal_g12a, .regmap_config = &amlogic_thermal_regmap_config_g12a, }; static const struct of_device_id of_amlogic_thermal_match[] = { { .compatible = "amlogic,g12a-ddr-thermal", .data = &amlogic_thermal_g12a_ddr_param, }, { .compatible = "amlogic,g12a-cpu-thermal", .data = &amlogic_thermal_g12a_cpu_param, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, of_amlogic_thermal_match); static int amlogic_thermal_probe(struct platform_device *pdev) { struct amlogic_thermal *pdata; struct device *dev = &pdev->dev; void __iomem *base; int ret; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; pdata->data = of_device_get_match_data(dev); pdata->pdev = pdev; platform_set_drvdata(pdev, pdata); base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { dev_err(dev, "failed to get io address\n"); return PTR_ERR(base); } pdata->regmap = devm_regmap_init_mmio(dev, base, pdata->data->regmap_config); if (IS_ERR(pdata->regmap)) return PTR_ERR(pdata->regmap); pdata->clk = devm_clk_get(dev, NULL); if (IS_ERR(pdata->clk)) { if (PTR_ERR(pdata->clk) != -EPROBE_DEFER) dev_err(dev, "failed to get clock\n"); return PTR_ERR(pdata->clk); } pdata->sec_ao_map = syscon_regmap_lookup_by_phandle (pdev->dev.of_node, "amlogic,ao-secure"); if (IS_ERR(pdata->sec_ao_map)) { dev_err(dev, "syscon regmap lookup failed.\n"); return PTR_ERR(pdata->sec_ao_map); } pdata->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, pdata, &amlogic_thermal_ops); if (IS_ERR(pdata->tzd)) { ret = PTR_ERR(pdata->tzd); dev_err(dev, "Failed to register tsensor: %d\n", ret); return ret; } ret = amlogic_thermal_initialize(pdata); if (ret) return ret; ret = amlogic_thermal_enable(pdata); return ret; } static int amlogic_thermal_remove(struct platform_device *pdev) { struct amlogic_thermal *data = platform_get_drvdata(pdev); return amlogic_thermal_disable(data); } static int __maybe_unused amlogic_thermal_suspend(struct device *dev) { struct amlogic_thermal *data = dev_get_drvdata(dev); return amlogic_thermal_disable(data); } static int __maybe_unused amlogic_thermal_resume(struct device *dev) { struct amlogic_thermal *data = dev_get_drvdata(dev); return amlogic_thermal_enable(data); } static SIMPLE_DEV_PM_OPS(amlogic_thermal_pm_ops, amlogic_thermal_suspend, amlogic_thermal_resume); static struct platform_driver amlogic_thermal_driver = { .driver = { .name = "amlogic_thermal", .pm = &amlogic_thermal_pm_ops, .of_match_table = of_amlogic_thermal_match, }, .probe = amlogic_thermal_probe, .remove = amlogic_thermal_remove, }; module_platform_driver(amlogic_thermal_driver); MODULE_AUTHOR("Guillaume La Roque <glaroque@baylibre.com>"); MODULE_DESCRIPTION("Amlogic thermal driver"); MODULE_LICENSE("GPL v2");
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