// SPDX-License-Identifier: GPL-2.0 /* * R-Car Gen3 THS thermal sensor driver * Based on rcar_thermal.c and work from Hien Dang and Khiem Nguyen. * * Copyright (C) 2016 Renesas Electronics Corporation. * Copyright (C) 2016 Sang Engineering */ #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/thermal.h> #include "../thermal_hwmon.h" /* Register offsets */ #define REG_GEN3_IRQSTR … #define REG_GEN3_IRQMSK … #define REG_GEN3_IRQCTL … #define REG_GEN3_IRQEN … #define REG_GEN3_IRQTEMP1 … #define REG_GEN3_IRQTEMP2 … #define REG_GEN3_IRQTEMP3 … #define REG_GEN3_THCTR … #define REG_GEN3_TEMP … #define REG_GEN3_THCODE1 … #define REG_GEN3_THCODE2 … #define REG_GEN3_THCODE3 … #define REG_GEN3_PTAT1 … #define REG_GEN3_PTAT2 … #define REG_GEN3_PTAT3 … #define REG_GEN3_THSCP … #define REG_GEN4_THSFMON00 … #define REG_GEN4_THSFMON01 … #define REG_GEN4_THSFMON02 … #define REG_GEN4_THSFMON15 … #define REG_GEN4_THSFMON16 … #define REG_GEN4_THSFMON17 … /* IRQ{STR,MSK,EN} bits */ #define IRQ_TEMP1 … #define IRQ_TEMP2 … #define IRQ_TEMP3 … #define IRQ_TEMPD1 … #define IRQ_TEMPD2 … #define IRQ_TEMPD3 … /* THCTR bits */ #define THCTR_PONM … #define THCTR_THSST … /* THSCP bits */ #define THSCP_COR_PARA_VLD … #define CTEMP_MASK … #define MCELSIUS(temp) … #define GEN3_FUSE_MASK … #define GEN4_FUSE_MASK … #define TSC_MAX_NUM … struct rcar_gen3_thermal_priv; struct rcar_thermal_info { … }; struct equation_set_coef { … }; struct rcar_gen3_thermal_tsc { … }; struct rcar_gen3_thermal_priv { … }; static inline u32 rcar_gen3_thermal_read(struct rcar_gen3_thermal_tsc *tsc, u32 reg) { … } static inline void rcar_gen3_thermal_write(struct rcar_gen3_thermal_tsc *tsc, u32 reg, u32 data) { … } /* * Linear approximation for temperature * * [temp] = ((thadj - [reg]) * a) / b + adj * [reg] = thadj - ([temp] - adj) * b / a * * The constants a and b are calculated using two triplets of int values PTAT * and THCODE. PTAT and THCODE can either be read from hardware or use hard * coded values from the driver. The formula to calculate a and b are taken from * the datasheet. Different calculations are needed for a and b depending on * if the input variables ([temp] or [reg]) are above or below a threshold. The * threshold is also calculated from PTAT and THCODE using formulas from the * datasheet. * * The constant thadj is one of the THCODE values, which one to use depends on * the threshold and input value. * * The constants adj is taken verbatim from the datasheet. Two values exists, * which one to use depends on the input value and the calculated threshold. * Furthermore different SoC models supported by the driver have different sets * of values. The values for each model are stored in the device match data. */ static void rcar_gen3_thermal_shared_coefs(struct rcar_gen3_thermal_priv *priv) { … } static void rcar_gen3_thermal_tsc_coefs(struct rcar_gen3_thermal_priv *priv, struct rcar_gen3_thermal_tsc *tsc) { … } static int rcar_gen3_thermal_get_temp(struct thermal_zone_device *tz, int *temp) { … } static int rcar_gen3_thermal_mcelsius_to_temp(struct rcar_gen3_thermal_tsc *tsc, int mcelsius) { … } static int rcar_gen3_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) { … } static const struct thermal_zone_device_ops rcar_gen3_tz_of_ops = …; static irqreturn_t rcar_gen3_thermal_irq(int irq, void *data) { … } static void rcar_gen3_thermal_read_fuses_gen3(struct rcar_gen3_thermal_priv *priv) { … } static void rcar_gen3_thermal_read_fuses_gen4(struct rcar_gen3_thermal_priv *priv) { … } static bool rcar_gen3_thermal_read_fuses(struct rcar_gen3_thermal_priv *priv) { … } static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_priv *priv, struct rcar_gen3_thermal_tsc *tsc) { … } static const struct rcar_thermal_info rcar_m3w_thermal_info = …; static const struct rcar_thermal_info rcar_gen3_thermal_info = …; static const struct rcar_thermal_info rcar_gen4_thermal_info = …; static const struct of_device_id rcar_gen3_thermal_dt_ids[] = …; MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids); static void rcar_gen3_thermal_remove(struct platform_device *pdev) { … } static void rcar_gen3_hwmon_action(void *data) { … } static int rcar_gen3_thermal_request_irqs(struct rcar_gen3_thermal_priv *priv, struct platform_device *pdev) { … } static int rcar_gen3_thermal_probe(struct platform_device *pdev) { … } static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(rcar_gen3_thermal_pm_ops, NULL, rcar_gen3_thermal_resume); static struct platform_driver rcar_gen3_thermal_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …;
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