// SPDX-License-Identifier: GPL-2.0-only #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/hwmon.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/polynomial.h> #include <linux/regmap.h> /* * The original translation formulae of the temperature (in degrees of Celsius) * are as follows: * * T = -3.4627e-11*(N^4) + 1.1023e-7*(N^3) + -1.9165e-4*(N^2) + * 3.0604e-1*(N^1) + -5.6197e1 * * where [-56.197, 136.402]C and N = [0, 1023]. * * They must be accordingly altered to be suitable for the integer arithmetics. * The technique is called 'factor redistribution', which just makes sure the * multiplications and divisions are made so to have a result of the operations * within the integer numbers limit. In addition we need to translate the * formulae to accept millidegrees of Celsius. Here what it looks like after * the alterations: * * T = -34627e-12*(N^4) + 110230e-9*(N^3) + -191650e-6*(N^2) + * 306040e-3*(N^1) + -56197 * * where T = [-56197, 136402]mC and N = [0, 1023]. */ static const struct polynomial poly_N_to_temp = …; #define PVT_SENSOR_CTRL … #define PVT_SENSOR_CFG … #define SENSOR_CFG_CLK_CFG … #define SENSOR_CFG_TRIM_VAL … #define SENSOR_CFG_SAMPLE_ENA … #define SENSOR_CFG_START_CAPTURE … #define SENSOR_CFG_CONTINIOUS_MODE … #define SENSOR_CFG_PSAMPLE_ENA … #define PVT_SENSOR_STAT … #define SENSOR_STAT_DATA_VALID … #define SENSOR_STAT_DATA … #define FAN_CFG … #define FAN_CFG_DUTY_CYCLE … #define INV_POL … #define GATE_ENA … #define PWM_OPEN_COL_ENA … #define FAN_STAT_CFG … #define FAN_PWM_FREQ … #define FAN_PWM_CYC_10US … #define FAN_PWM_FREQ_FREQ … #define FAN_CNT … #define FAN_CNT_DATA … #define LAN966X_PVT_CLK … struct lan966x_hwmon { … }; static int lan966x_hwmon_read_temp(struct device *dev, long *val) { … } static int lan966x_hwmon_read_fan(struct device *dev, long *val) { … } static int lan966x_hwmon_read_pwm(struct device *dev, long *val) { … } static int lan966x_hwmon_read_pwm_freq(struct device *dev, long *val) { … } static int lan966x_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int lan966x_hwmon_write_pwm(struct device *dev, long val) { … } static int lan966x_hwmon_write_pwm_freq(struct device *dev, long val) { … } static int lan966x_hwmon_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t lan966x_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_channel_info * const lan966x_hwmon_info[] = …; static const struct hwmon_ops lan966x_hwmon_ops = …; static const struct hwmon_chip_info lan966x_hwmon_chip_info = …; static void lan966x_hwmon_disable(void *data) { … } static int lan966x_hwmon_enable(struct device *dev, struct lan966x_hwmon *hwmon) { … } static struct regmap *lan966x_init_regmap(struct platform_device *pdev, const char *name) { … } static int lan966x_hwmon_probe(struct platform_device *pdev) { … } static const struct of_device_id lan966x_hwmon_of_match[] = …; MODULE_DEVICE_TABLE(of, lan966x_hwmon_of_match); static struct platform_driver lan966x_hwmon_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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