1c9545790SKuninori Morimoto // SPDX-License-Identifier: GPL-2.0 21e426ffdSKuninori Morimoto /* 31e426ffdSKuninori Morimoto * R-Car THS/TSC thermal sensor driver 41e426ffdSKuninori Morimoto * 51e426ffdSKuninori Morimoto * Copyright (C) 2012 Renesas Solutions Corp. 61e426ffdSKuninori Morimoto * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 71e426ffdSKuninori Morimoto */ 81e426ffdSKuninori Morimoto #include <linux/delay.h> 91e426ffdSKuninori Morimoto #include <linux/err.h> 10e0a5172eSKuninori Morimoto #include <linux/irq.h> 11e0a5172eSKuninori Morimoto #include <linux/interrupt.h> 121e426ffdSKuninori Morimoto #include <linux/io.h> 131e426ffdSKuninori Morimoto #include <linux/module.h> 148b477ea5SKuninori Morimoto #include <linux/of_device.h> 151e426ffdSKuninori Morimoto #include <linux/platform_device.h> 1651d45d25SKuninori Morimoto #include <linux/pm_runtime.h> 17d2a73e22Skuninori.morimoto.gx@renesas.com #include <linux/reboot.h> 181e426ffdSKuninori Morimoto #include <linux/slab.h> 191e426ffdSKuninori Morimoto #include <linux/spinlock.h> 201e426ffdSKuninori Morimoto #include <linux/thermal.h> 211e426ffdSKuninori Morimoto 2264a411e8SKuninori Morimoto #include "thermal_hwmon.h" 2364a411e8SKuninori Morimoto 24d2a73e22Skuninori.morimoto.gx@renesas.com #define IDLE_INTERVAL 5000 25d2a73e22Skuninori.morimoto.gx@renesas.com 26e0a5172eSKuninori Morimoto #define COMMON_STR 0x00 27e0a5172eSKuninori Morimoto #define COMMON_ENR 0x04 28e0a5172eSKuninori Morimoto #define COMMON_INTMSK 0x0c 29e0a5172eSKuninori Morimoto 30e0a5172eSKuninori Morimoto #define REG_POSNEG 0x20 31e0a5172eSKuninori Morimoto #define REG_FILONOFF 0x28 32e9137a58SKuninori Morimoto #define REG_THSCR 0x2c 33e9137a58SKuninori Morimoto #define REG_THSSR 0x30 34e0a5172eSKuninori Morimoto #define REG_INTCTRL 0x34 351e426ffdSKuninori Morimoto 361e426ffdSKuninori Morimoto /* THSCR */ 37f8f53e18SKuninori Morimoto #define CPCTL (1 << 12) 381e426ffdSKuninori Morimoto 391e426ffdSKuninori Morimoto /* THSSR */ 401e426ffdSKuninori Morimoto #define CTEMP 0x3f 411e426ffdSKuninori Morimoto 423676d1ddSKuninori Morimoto struct rcar_thermal_common { 433676d1ddSKuninori Morimoto void __iomem *base; 443676d1ddSKuninori Morimoto struct device *dev; 453676d1ddSKuninori Morimoto struct list_head head; 46e0a5172eSKuninori Morimoto spinlock_t lock; 473676d1ddSKuninori Morimoto }; 481e426ffdSKuninori Morimoto 491969d9dcSYoshihiro Kaneko struct rcar_thermal_chip { 501969d9dcSYoshihiro Kaneko unsigned int use_of_thermal : 1; 511969d9dcSYoshihiro Kaneko unsigned int has_filonoff : 1; 521969d9dcSYoshihiro Kaneko unsigned int irq_per_ch : 1; 531969d9dcSYoshihiro Kaneko unsigned int needs_suspend_resume : 1; 541969d9dcSYoshihiro Kaneko unsigned int nirqs; 551969d9dcSYoshihiro Kaneko }; 561969d9dcSYoshihiro Kaneko 571969d9dcSYoshihiro Kaneko static const struct rcar_thermal_chip rcar_thermal = { 581969d9dcSYoshihiro Kaneko .use_of_thermal = 0, 591969d9dcSYoshihiro Kaneko .has_filonoff = 1, 601969d9dcSYoshihiro Kaneko .irq_per_ch = 0, 611969d9dcSYoshihiro Kaneko .needs_suspend_resume = 0, 621969d9dcSYoshihiro Kaneko .nirqs = 1, 631969d9dcSYoshihiro Kaneko }; 641969d9dcSYoshihiro Kaneko 651969d9dcSYoshihiro Kaneko static const struct rcar_thermal_chip rcar_gen2_thermal = { 661969d9dcSYoshihiro Kaneko .use_of_thermal = 1, 671969d9dcSYoshihiro Kaneko .has_filonoff = 1, 681969d9dcSYoshihiro Kaneko .irq_per_ch = 0, 691969d9dcSYoshihiro Kaneko .needs_suspend_resume = 0, 701969d9dcSYoshihiro Kaneko .nirqs = 1, 711969d9dcSYoshihiro Kaneko }; 721969d9dcSYoshihiro Kaneko 731969d9dcSYoshihiro Kaneko static const struct rcar_thermal_chip rcar_gen3_thermal = { 741969d9dcSYoshihiro Kaneko .use_of_thermal = 1, 751969d9dcSYoshihiro Kaneko .has_filonoff = 0, 761969d9dcSYoshihiro Kaneko .irq_per_ch = 1, 771969d9dcSYoshihiro Kaneko .needs_suspend_resume = 1, 781969d9dcSYoshihiro Kaneko /* 791969d9dcSYoshihiro Kaneko * The Gen3 chip has 3 interrupts, but this driver uses only 2 801969d9dcSYoshihiro Kaneko * interrupts to detect a temperature change, rise or fall. 811969d9dcSYoshihiro Kaneko */ 821969d9dcSYoshihiro Kaneko .nirqs = 2, 831969d9dcSYoshihiro Kaneko }; 841969d9dcSYoshihiro Kaneko 851e426ffdSKuninori Morimoto struct rcar_thermal_priv { 861e426ffdSKuninori Morimoto void __iomem *base; 873676d1ddSKuninori Morimoto struct rcar_thermal_common *common; 883676d1ddSKuninori Morimoto struct thermal_zone_device *zone; 891969d9dcSYoshihiro Kaneko const struct rcar_thermal_chip *chip; 90e0a5172eSKuninori Morimoto struct delayed_work work; 91b2bbc6a2SKuninori Morimoto struct mutex lock; 923676d1ddSKuninori Morimoto struct list_head list; 93e0a5172eSKuninori Morimoto int id; 94913015c6SYoshihiro Shimoda u32 ctemp; 951e426ffdSKuninori Morimoto }; 961e426ffdSKuninori Morimoto 973676d1ddSKuninori Morimoto #define rcar_thermal_for_each_priv(pos, common) \ 983676d1ddSKuninori Morimoto list_for_each_entry(pos, &common->head, list) 993676d1ddSKuninori Morimoto 100c499703eSKuninori Morimoto #define MCELSIUS(temp) ((temp) * 1000) 1019dde8f86SKuninori Morimoto #define rcar_zone_to_priv(zone) ((zone)->devdata) 1023676d1ddSKuninori Morimoto #define rcar_priv_to_dev(priv) ((priv)->common->dev) 1033676d1ddSKuninori Morimoto #define rcar_has_irq_support(priv) ((priv)->common->base) 104e0a5172eSKuninori Morimoto #define rcar_id_to_shift(priv) ((priv)->id * 8) 105e0a5172eSKuninori Morimoto 106ca1e4558SKuninori Morimoto static const struct of_device_id rcar_thermal_dt_ids[] = { 1071969d9dcSYoshihiro Kaneko { 1081969d9dcSYoshihiro Kaneko .compatible = "renesas,rcar-thermal", 1091969d9dcSYoshihiro Kaneko .data = &rcar_thermal, 1101969d9dcSYoshihiro Kaneko }, 1111969d9dcSYoshihiro Kaneko { 1121969d9dcSYoshihiro Kaneko .compatible = "renesas,rcar-gen2-thermal", 1131969d9dcSYoshihiro Kaneko .data = &rcar_gen2_thermal, 1141969d9dcSYoshihiro Kaneko }, 1151969d9dcSYoshihiro Kaneko { 1161969d9dcSYoshihiro Kaneko .compatible = "renesas,thermal-r8a77995", 1171969d9dcSYoshihiro Kaneko .data = &rcar_gen3_thermal, 1181969d9dcSYoshihiro Kaneko }, 119ca1e4558SKuninori Morimoto {}, 120ca1e4558SKuninori Morimoto }; 121ca1e4558SKuninori Morimoto MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids); 122ca1e4558SKuninori Morimoto 1231e426ffdSKuninori Morimoto /* 1241e426ffdSKuninori Morimoto * basic functions 1251e426ffdSKuninori Morimoto */ 126e9137a58SKuninori Morimoto #define rcar_thermal_common_read(c, r) \ 127e9137a58SKuninori Morimoto _rcar_thermal_common_read(c, COMMON_ ##r) 128e9137a58SKuninori Morimoto static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common, 129e9137a58SKuninori Morimoto u32 reg) 130e9137a58SKuninori Morimoto { 131e9137a58SKuninori Morimoto return ioread32(common->base + reg); 132e9137a58SKuninori Morimoto } 133e9137a58SKuninori Morimoto 134e9137a58SKuninori Morimoto #define rcar_thermal_common_write(c, r, d) \ 135e9137a58SKuninori Morimoto _rcar_thermal_common_write(c, COMMON_ ##r, d) 136e9137a58SKuninori Morimoto static void _rcar_thermal_common_write(struct rcar_thermal_common *common, 137e9137a58SKuninori Morimoto u32 reg, u32 data) 138e9137a58SKuninori Morimoto { 139e9137a58SKuninori Morimoto iowrite32(data, common->base + reg); 140e9137a58SKuninori Morimoto } 141e9137a58SKuninori Morimoto 142e9137a58SKuninori Morimoto #define rcar_thermal_common_bset(c, r, m, d) \ 143e9137a58SKuninori Morimoto _rcar_thermal_common_bset(c, COMMON_ ##r, m, d) 144e9137a58SKuninori Morimoto static void _rcar_thermal_common_bset(struct rcar_thermal_common *common, 145e9137a58SKuninori Morimoto u32 reg, u32 mask, u32 data) 146e9137a58SKuninori Morimoto { 147e9137a58SKuninori Morimoto u32 val; 148e9137a58SKuninori Morimoto 149e9137a58SKuninori Morimoto val = ioread32(common->base + reg); 150e9137a58SKuninori Morimoto val &= ~mask; 151e9137a58SKuninori Morimoto val |= (data & mask); 152e9137a58SKuninori Morimoto iowrite32(val, common->base + reg); 153e9137a58SKuninori Morimoto } 154e9137a58SKuninori Morimoto 155e9137a58SKuninori Morimoto #define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r) 156e9137a58SKuninori Morimoto static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg) 1571e426ffdSKuninori Morimoto { 158b2bbc6a2SKuninori Morimoto return ioread32(priv->base + reg); 1591e426ffdSKuninori Morimoto } 1601e426ffdSKuninori Morimoto 161e9137a58SKuninori Morimoto #define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d) 162e9137a58SKuninori Morimoto static void _rcar_thermal_write(struct rcar_thermal_priv *priv, 1631e426ffdSKuninori Morimoto u32 reg, u32 data) 1641e426ffdSKuninori Morimoto { 1651e426ffdSKuninori Morimoto iowrite32(data, priv->base + reg); 1661e426ffdSKuninori Morimoto } 1671e426ffdSKuninori Morimoto 168e9137a58SKuninori Morimoto #define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d) 169e9137a58SKuninori Morimoto static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg, 1701e426ffdSKuninori Morimoto u32 mask, u32 data) 1711e426ffdSKuninori Morimoto { 1721e426ffdSKuninori Morimoto u32 val; 1731e426ffdSKuninori Morimoto 1741e426ffdSKuninori Morimoto val = ioread32(priv->base + reg); 1751e426ffdSKuninori Morimoto val &= ~mask; 1761e426ffdSKuninori Morimoto val |= (data & mask); 1771e426ffdSKuninori Morimoto iowrite32(val, priv->base + reg); 1781e426ffdSKuninori Morimoto } 1791e426ffdSKuninori Morimoto 1801e426ffdSKuninori Morimoto /* 1811e426ffdSKuninori Morimoto * zone device functions 1821e426ffdSKuninori Morimoto */ 183e0a5172eSKuninori Morimoto static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv) 1841e426ffdSKuninori Morimoto { 185f8f53e18SKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 186f8f53e18SKuninori Morimoto int i; 187913015c6SYoshihiro Shimoda u32 ctemp, old, new; 188f0e68fc3SWei Yongjun int ret = -EINVAL; 1891e426ffdSKuninori Morimoto 190b2bbc6a2SKuninori Morimoto mutex_lock(&priv->lock); 191b2bbc6a2SKuninori Morimoto 1921e426ffdSKuninori Morimoto /* 193f8f53e18SKuninori Morimoto * TSC decides a value of CPTAP automatically, 194f8f53e18SKuninori Morimoto * and this is the conditions which validate interrupt. 1951e426ffdSKuninori Morimoto */ 196f8f53e18SKuninori Morimoto rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL); 1971e426ffdSKuninori Morimoto 198f8f53e18SKuninori Morimoto ctemp = 0; 199f8f53e18SKuninori Morimoto old = ~0; 200f8f53e18SKuninori Morimoto for (i = 0; i < 128; i++) { 2011e426ffdSKuninori Morimoto /* 2021e426ffdSKuninori Morimoto * we need to wait 300us after changing comparator offset 2031e426ffdSKuninori Morimoto * to get stable temperature. 2041e426ffdSKuninori Morimoto * see "Usage Notes" on datasheet 2051e426ffdSKuninori Morimoto */ 2061e426ffdSKuninori Morimoto udelay(300); 2071e426ffdSKuninori Morimoto 208f8f53e18SKuninori Morimoto new = rcar_thermal_read(priv, THSSR) & CTEMP; 209f8f53e18SKuninori Morimoto if (new == old) { 210f8f53e18SKuninori Morimoto ctemp = new; 2111e426ffdSKuninori Morimoto break; 2121e426ffdSKuninori Morimoto } 213f8f53e18SKuninori Morimoto old = new; 2141e426ffdSKuninori Morimoto } 2151e426ffdSKuninori Morimoto 216f8f53e18SKuninori Morimoto if (!ctemp) { 217f8f53e18SKuninori Morimoto dev_err(dev, "thermal sensor was broken\n"); 218f0e68fc3SWei Yongjun goto err_out_unlock; 219f8f53e18SKuninori Morimoto } 220f8f53e18SKuninori Morimoto 221e0a5172eSKuninori Morimoto /* 222e0a5172eSKuninori Morimoto * enable IRQ 223e0a5172eSKuninori Morimoto */ 224e0a5172eSKuninori Morimoto if (rcar_has_irq_support(priv)) { 2251969d9dcSYoshihiro Kaneko if (priv->chip->has_filonoff) 226e0a5172eSKuninori Morimoto rcar_thermal_write(priv, FILONOFF, 0); 227f8f53e18SKuninori Morimoto 228e0a5172eSKuninori Morimoto /* enable Rising/Falling edge interrupt */ 229e0a5172eSKuninori Morimoto rcar_thermal_write(priv, POSNEG, 0x1); 230e0a5172eSKuninori Morimoto rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) | 231e0a5172eSKuninori Morimoto ((ctemp - 1) << 0))); 232e0a5172eSKuninori Morimoto } 233e0a5172eSKuninori Morimoto 234e0a5172eSKuninori Morimoto dev_dbg(dev, "thermal%d %d -> %d\n", priv->id, priv->ctemp, ctemp); 235e0a5172eSKuninori Morimoto 236e0a5172eSKuninori Morimoto priv->ctemp = ctemp; 237f0e68fc3SWei Yongjun ret = 0; 238f0e68fc3SWei Yongjun err_out_unlock: 239e0a5172eSKuninori Morimoto mutex_unlock(&priv->lock); 240f0e68fc3SWei Yongjun return ret; 241e0a5172eSKuninori Morimoto } 242e0a5172eSKuninori Morimoto 2438b477ea5SKuninori Morimoto static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv, 2448b477ea5SKuninori Morimoto int *temp) 245e0a5172eSKuninori Morimoto { 2465440c40bSKuninori Morimoto int tmp; 247a1ade565SKuninori Morimoto int ret; 248e0a5172eSKuninori Morimoto 249a1ade565SKuninori Morimoto ret = rcar_thermal_update_temp(priv); 250a1ade565SKuninori Morimoto if (ret < 0) 251a1ade565SKuninori Morimoto return ret; 252e0a5172eSKuninori Morimoto 253e0a5172eSKuninori Morimoto mutex_lock(&priv->lock); 2545440c40bSKuninori Morimoto tmp = MCELSIUS((priv->ctemp * 5) - 65); 255b2bbc6a2SKuninori Morimoto mutex_unlock(&priv->lock); 256b2bbc6a2SKuninori Morimoto 2575440c40bSKuninori Morimoto if ((tmp < MCELSIUS(-45)) || (tmp > MCELSIUS(125))) { 2585440c40bSKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 2595440c40bSKuninori Morimoto 2605440c40bSKuninori Morimoto dev_err(dev, "it couldn't measure temperature correctly\n"); 2615440c40bSKuninori Morimoto return -EIO; 2625440c40bSKuninori Morimoto } 2635440c40bSKuninori Morimoto 2645440c40bSKuninori Morimoto *temp = tmp; 2655440c40bSKuninori Morimoto 2661e426ffdSKuninori Morimoto return 0; 2671e426ffdSKuninori Morimoto } 2681e426ffdSKuninori Morimoto 2698b477ea5SKuninori Morimoto static int rcar_thermal_of_get_temp(void *data, int *temp) 2708b477ea5SKuninori Morimoto { 2718b477ea5SKuninori Morimoto struct rcar_thermal_priv *priv = data; 2728b477ea5SKuninori Morimoto 2738b477ea5SKuninori Morimoto return rcar_thermal_get_current_temp(priv, temp); 2748b477ea5SKuninori Morimoto } 2758b477ea5SKuninori Morimoto 2768b477ea5SKuninori Morimoto static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp) 2778b477ea5SKuninori Morimoto { 2788b477ea5SKuninori Morimoto struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); 2798b477ea5SKuninori Morimoto 2808b477ea5SKuninori Morimoto return rcar_thermal_get_current_temp(priv, temp); 2818b477ea5SKuninori Morimoto } 2828b477ea5SKuninori Morimoto 283d2a73e22Skuninori.morimoto.gx@renesas.com static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone, 284d2a73e22Skuninori.morimoto.gx@renesas.com int trip, enum thermal_trip_type *type) 285d2a73e22Skuninori.morimoto.gx@renesas.com { 286d2a73e22Skuninori.morimoto.gx@renesas.com struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); 2873676d1ddSKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 288d2a73e22Skuninori.morimoto.gx@renesas.com 289d2a73e22Skuninori.morimoto.gx@renesas.com /* see rcar_thermal_get_temp() */ 290d2a73e22Skuninori.morimoto.gx@renesas.com switch (trip) { 291d2a73e22Skuninori.morimoto.gx@renesas.com case 0: /* +90 <= temp */ 292d2a73e22Skuninori.morimoto.gx@renesas.com *type = THERMAL_TRIP_CRITICAL; 293d2a73e22Skuninori.morimoto.gx@renesas.com break; 294d2a73e22Skuninori.morimoto.gx@renesas.com default: 2953676d1ddSKuninori Morimoto dev_err(dev, "rcar driver trip error\n"); 296d2a73e22Skuninori.morimoto.gx@renesas.com return -EINVAL; 297d2a73e22Skuninori.morimoto.gx@renesas.com } 298d2a73e22Skuninori.morimoto.gx@renesas.com 299d2a73e22Skuninori.morimoto.gx@renesas.com return 0; 300d2a73e22Skuninori.morimoto.gx@renesas.com } 301d2a73e22Skuninori.morimoto.gx@renesas.com 302d2a73e22Skuninori.morimoto.gx@renesas.com static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone, 30317e8351aSSascha Hauer int trip, int *temp) 304d2a73e22Skuninori.morimoto.gx@renesas.com { 305d2a73e22Skuninori.morimoto.gx@renesas.com struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); 3063676d1ddSKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 307d2a73e22Skuninori.morimoto.gx@renesas.com 308d2a73e22Skuninori.morimoto.gx@renesas.com /* see rcar_thermal_get_temp() */ 309d2a73e22Skuninori.morimoto.gx@renesas.com switch (trip) { 310d2a73e22Skuninori.morimoto.gx@renesas.com case 0: /* +90 <= temp */ 311d2a73e22Skuninori.morimoto.gx@renesas.com *temp = MCELSIUS(90); 312d2a73e22Skuninori.morimoto.gx@renesas.com break; 313d2a73e22Skuninori.morimoto.gx@renesas.com default: 3143676d1ddSKuninori Morimoto dev_err(dev, "rcar driver trip error\n"); 315d2a73e22Skuninori.morimoto.gx@renesas.com return -EINVAL; 316d2a73e22Skuninori.morimoto.gx@renesas.com } 317d2a73e22Skuninori.morimoto.gx@renesas.com 318d2a73e22Skuninori.morimoto.gx@renesas.com return 0; 319d2a73e22Skuninori.morimoto.gx@renesas.com } 320d2a73e22Skuninori.morimoto.gx@renesas.com 321d2a73e22Skuninori.morimoto.gx@renesas.com static int rcar_thermal_notify(struct thermal_zone_device *zone, 322d2a73e22Skuninori.morimoto.gx@renesas.com int trip, enum thermal_trip_type type) 323d2a73e22Skuninori.morimoto.gx@renesas.com { 324d2a73e22Skuninori.morimoto.gx@renesas.com struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); 3253676d1ddSKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 326d2a73e22Skuninori.morimoto.gx@renesas.com 327d2a73e22Skuninori.morimoto.gx@renesas.com switch (type) { 328d2a73e22Skuninori.morimoto.gx@renesas.com case THERMAL_TRIP_CRITICAL: 329d2a73e22Skuninori.morimoto.gx@renesas.com /* FIXME */ 3303676d1ddSKuninori Morimoto dev_warn(dev, "Thermal reached to critical temperature\n"); 331d2a73e22Skuninori.morimoto.gx@renesas.com break; 332d2a73e22Skuninori.morimoto.gx@renesas.com default: 333d2a73e22Skuninori.morimoto.gx@renesas.com break; 334d2a73e22Skuninori.morimoto.gx@renesas.com } 335d2a73e22Skuninori.morimoto.gx@renesas.com 336d2a73e22Skuninori.morimoto.gx@renesas.com return 0; 337d2a73e22Skuninori.morimoto.gx@renesas.com } 338d2a73e22Skuninori.morimoto.gx@renesas.com 3398b477ea5SKuninori Morimoto static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = { 3408b477ea5SKuninori Morimoto .get_temp = rcar_thermal_of_get_temp, 3418b477ea5SKuninori Morimoto }; 3428b477ea5SKuninori Morimoto 3431e426ffdSKuninori Morimoto static struct thermal_zone_device_ops rcar_thermal_zone_ops = { 3441e426ffdSKuninori Morimoto .get_temp = rcar_thermal_get_temp, 345d2a73e22Skuninori.morimoto.gx@renesas.com .get_trip_type = rcar_thermal_get_trip_type, 346d2a73e22Skuninori.morimoto.gx@renesas.com .get_trip_temp = rcar_thermal_get_trip_temp, 347d2a73e22Skuninori.morimoto.gx@renesas.com .notify = rcar_thermal_notify, 3481e426ffdSKuninori Morimoto }; 3491e426ffdSKuninori Morimoto 3501e426ffdSKuninori Morimoto /* 351e0a5172eSKuninori Morimoto * interrupt 352e0a5172eSKuninori Morimoto */ 353e0a5172eSKuninori Morimoto #define rcar_thermal_irq_enable(p) _rcar_thermal_irq_ctrl(p, 1) 354e0a5172eSKuninori Morimoto #define rcar_thermal_irq_disable(p) _rcar_thermal_irq_ctrl(p, 0) 355e0a5172eSKuninori Morimoto static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable) 356e0a5172eSKuninori Morimoto { 357e0a5172eSKuninori Morimoto struct rcar_thermal_common *common = priv->common; 358e0a5172eSKuninori Morimoto unsigned long flags; 359e0a5172eSKuninori Morimoto u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */ 360e0a5172eSKuninori Morimoto 361ffbcdf8aSKuninori Morimoto if (!rcar_has_irq_support(priv)) 362ffbcdf8aSKuninori Morimoto return; 363ffbcdf8aSKuninori Morimoto 364e0a5172eSKuninori Morimoto spin_lock_irqsave(&common->lock, flags); 365e0a5172eSKuninori Morimoto 366e0a5172eSKuninori Morimoto rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask); 367e0a5172eSKuninori Morimoto 368e0a5172eSKuninori Morimoto spin_unlock_irqrestore(&common->lock, flags); 369e0a5172eSKuninori Morimoto } 370e0a5172eSKuninori Morimoto 371e0a5172eSKuninori Morimoto static void rcar_thermal_work(struct work_struct *work) 372e0a5172eSKuninori Morimoto { 373e0a5172eSKuninori Morimoto struct rcar_thermal_priv *priv; 37417e8351aSSascha Hauer int cctemp, nctemp; 375a1ade565SKuninori Morimoto int ret; 376e0a5172eSKuninori Morimoto 377e0a5172eSKuninori Morimoto priv = container_of(work, struct rcar_thermal_priv, work.work); 378e0a5172eSKuninori Morimoto 3798b477ea5SKuninori Morimoto ret = rcar_thermal_get_current_temp(priv, &cctemp); 3808b477ea5SKuninori Morimoto if (ret < 0) 3818b477ea5SKuninori Morimoto return; 3828b477ea5SKuninori Morimoto 383a1ade565SKuninori Morimoto ret = rcar_thermal_update_temp(priv); 384a1ade565SKuninori Morimoto if (ret < 0) 385a1ade565SKuninori Morimoto return; 386a1ade565SKuninori Morimoto 387e0a5172eSKuninori Morimoto rcar_thermal_irq_enable(priv); 3889477165eSPatrick Titiano 3898b477ea5SKuninori Morimoto ret = rcar_thermal_get_current_temp(priv, &nctemp); 3908b477ea5SKuninori Morimoto if (ret < 0) 3918b477ea5SKuninori Morimoto return; 3928b477ea5SKuninori Morimoto 3939477165eSPatrick Titiano if (nctemp != cctemp) 3940e70f466SSrinivas Pandruvada thermal_zone_device_update(priv->zone, 3950e70f466SSrinivas Pandruvada THERMAL_EVENT_UNSPECIFIED); 396e0a5172eSKuninori Morimoto } 397e0a5172eSKuninori Morimoto 398e0a5172eSKuninori Morimoto static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status) 399e0a5172eSKuninori Morimoto { 400e0a5172eSKuninori Morimoto struct device *dev = rcar_priv_to_dev(priv); 401e0a5172eSKuninori Morimoto 402e0a5172eSKuninori Morimoto status = (status >> rcar_id_to_shift(priv)) & 0x3; 403e0a5172eSKuninori Morimoto 404206c0cbaSPatrick Titiano if (status) { 405e0a5172eSKuninori Morimoto dev_dbg(dev, "thermal%d %s%s\n", 406e0a5172eSKuninori Morimoto priv->id, 407e0a5172eSKuninori Morimoto (status & 0x2) ? "Rising " : "", 408e0a5172eSKuninori Morimoto (status & 0x1) ? "Falling" : ""); 409e0a5172eSKuninori Morimoto } 410e0a5172eSKuninori Morimoto 411e0a5172eSKuninori Morimoto return status; 412e0a5172eSKuninori Morimoto } 413e0a5172eSKuninori Morimoto 414e0a5172eSKuninori Morimoto static irqreturn_t rcar_thermal_irq(int irq, void *data) 415e0a5172eSKuninori Morimoto { 416e0a5172eSKuninori Morimoto struct rcar_thermal_common *common = data; 417e0a5172eSKuninori Morimoto struct rcar_thermal_priv *priv; 418e0a5172eSKuninori Morimoto unsigned long flags; 419e0a5172eSKuninori Morimoto u32 status, mask; 420e0a5172eSKuninori Morimoto 421e0a5172eSKuninori Morimoto spin_lock_irqsave(&common->lock, flags); 422e0a5172eSKuninori Morimoto 423e0a5172eSKuninori Morimoto mask = rcar_thermal_common_read(common, INTMSK); 424e0a5172eSKuninori Morimoto status = rcar_thermal_common_read(common, STR); 425e0a5172eSKuninori Morimoto rcar_thermal_common_write(common, STR, 0x000F0F0F & mask); 426e0a5172eSKuninori Morimoto 427e0a5172eSKuninori Morimoto spin_unlock_irqrestore(&common->lock, flags); 428e0a5172eSKuninori Morimoto 429e0a5172eSKuninori Morimoto status = status & ~mask; 430e0a5172eSKuninori Morimoto 431e0a5172eSKuninori Morimoto /* 432e0a5172eSKuninori Morimoto * check the status 433e0a5172eSKuninori Morimoto */ 434e0a5172eSKuninori Morimoto rcar_thermal_for_each_priv(priv, common) { 435e0a5172eSKuninori Morimoto if (rcar_thermal_had_changed(priv, status)) { 436e0a5172eSKuninori Morimoto rcar_thermal_irq_disable(priv); 437e0a5172eSKuninori Morimoto schedule_delayed_work(&priv->work, 438e0a5172eSKuninori Morimoto msecs_to_jiffies(300)); 439e0a5172eSKuninori Morimoto } 440e0a5172eSKuninori Morimoto } 441e0a5172eSKuninori Morimoto 442e0a5172eSKuninori Morimoto return IRQ_HANDLED; 443e0a5172eSKuninori Morimoto } 444e0a5172eSKuninori Morimoto 445e0a5172eSKuninori Morimoto /* 4461e426ffdSKuninori Morimoto * platform functions 4471e426ffdSKuninori Morimoto */ 44884f0e490SKuninori Morimoto static int rcar_thermal_remove(struct platform_device *pdev) 44984f0e490SKuninori Morimoto { 45084f0e490SKuninori Morimoto struct rcar_thermal_common *common = platform_get_drvdata(pdev); 45184f0e490SKuninori Morimoto struct device *dev = &pdev->dev; 45284f0e490SKuninori Morimoto struct rcar_thermal_priv *priv; 45384f0e490SKuninori Morimoto 45484f0e490SKuninori Morimoto rcar_thermal_for_each_priv(priv, common) { 45584f0e490SKuninori Morimoto rcar_thermal_irq_disable(priv); 4561969d9dcSYoshihiro Kaneko if (priv->chip->use_of_thermal) 45764a411e8SKuninori Morimoto thermal_remove_hwmon_sysfs(priv->zone); 458d4b23c5cSBui Duc Phuc else 45984f0e490SKuninori Morimoto thermal_zone_device_unregister(priv->zone); 46084f0e490SKuninori Morimoto } 46184f0e490SKuninori Morimoto 46284f0e490SKuninori Morimoto pm_runtime_put(dev); 46384f0e490SKuninori Morimoto pm_runtime_disable(dev); 46484f0e490SKuninori Morimoto 46584f0e490SKuninori Morimoto return 0; 46684f0e490SKuninori Morimoto } 46784f0e490SKuninori Morimoto 4681e426ffdSKuninori Morimoto static int rcar_thermal_probe(struct platform_device *pdev) 4691e426ffdSKuninori Morimoto { 4703676d1ddSKuninori Morimoto struct rcar_thermal_common *common; 4711e426ffdSKuninori Morimoto struct rcar_thermal_priv *priv; 4723676d1ddSKuninori Morimoto struct device *dev = &pdev->dev; 4733676d1ddSKuninori Morimoto struct resource *res, *irq; 4741969d9dcSYoshihiro Kaneko const struct rcar_thermal_chip *chip = of_device_get_match_data(dev); 4753676d1ddSKuninori Morimoto int mres = 0; 4763676d1ddSKuninori Morimoto int i; 477fb84d990SDevendra Naga int ret = -ENODEV; 478e0a5172eSKuninori Morimoto int idle = IDLE_INTERVAL; 47911313746SYoshihiro Shimoda u32 enr_bits = 0; 4801e426ffdSKuninori Morimoto 4813676d1ddSKuninori Morimoto common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL); 482b0a60d88SJingoo Han if (!common) 4833676d1ddSKuninori Morimoto return -ENOMEM; 4843676d1ddSKuninori Morimoto 48584f0e490SKuninori Morimoto platform_set_drvdata(pdev, common); 48684f0e490SKuninori Morimoto 4873676d1ddSKuninori Morimoto INIT_LIST_HEAD(&common->head); 488e0a5172eSKuninori Morimoto spin_lock_init(&common->lock); 4893676d1ddSKuninori Morimoto common->dev = dev; 4903676d1ddSKuninori Morimoto 49151d45d25SKuninori Morimoto pm_runtime_enable(dev); 49251d45d25SKuninori Morimoto pm_runtime_get_sync(dev); 49351d45d25SKuninori Morimoto 4941969d9dcSYoshihiro Kaneko for (i = 0; i < chip->nirqs; i++) { 4953676d1ddSKuninori Morimoto irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 4961969d9dcSYoshihiro Kaneko if (!irq) 4971969d9dcSYoshihiro Kaneko continue; 4981969d9dcSYoshihiro Kaneko if (!common->base) { 4993676d1ddSKuninori Morimoto /* 5003676d1ddSKuninori Morimoto * platform has IRQ support. 501ee853addSGeert Uytterhoeven * Then, driver uses common registers 5023676d1ddSKuninori Morimoto * rcar_has_irq_support() will be enabled 5033676d1ddSKuninori Morimoto */ 5041969d9dcSYoshihiro Kaneko res = platform_get_resource(pdev, IORESOURCE_MEM, 5051969d9dcSYoshihiro Kaneko mres++); 5065095526fSSachin Kamat common->base = devm_ioremap_resource(dev, res); 5075095526fSSachin Kamat if (IS_ERR(common->base)) 5085095526fSSachin Kamat return PTR_ERR(common->base); 509e0a5172eSKuninori Morimoto 5106fe495e0SGeert Uytterhoeven idle = 0; /* polling delay is not needed */ 5113676d1ddSKuninori Morimoto } 5123676d1ddSKuninori Morimoto 5131969d9dcSYoshihiro Kaneko ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 5141969d9dcSYoshihiro Kaneko IRQF_SHARED, dev_name(dev), common); 5151969d9dcSYoshihiro Kaneko if (ret) { 5161969d9dcSYoshihiro Kaneko dev_err(dev, "irq request failed\n "); 5171969d9dcSYoshihiro Kaneko goto error_unregister; 5181969d9dcSYoshihiro Kaneko } 5191969d9dcSYoshihiro Kaneko 5201969d9dcSYoshihiro Kaneko /* update ENR bits */ 5211969d9dcSYoshihiro Kaneko if (chip->irq_per_ch) 5221969d9dcSYoshihiro Kaneko enr_bits |= 1 << i; 5231969d9dcSYoshihiro Kaneko } 5241969d9dcSYoshihiro Kaneko 5253676d1ddSKuninori Morimoto for (i = 0;; i++) { 5263676d1ddSKuninori Morimoto res = platform_get_resource(pdev, IORESOURCE_MEM, mres++); 5273676d1ddSKuninori Morimoto if (!res) 5283676d1ddSKuninori Morimoto break; 5293676d1ddSKuninori Morimoto 5303676d1ddSKuninori Morimoto priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 5311e426ffdSKuninori Morimoto if (!priv) { 5321dc20828SKuninori Morimoto ret = -ENOMEM; 5331dc20828SKuninori Morimoto goto error_unregister; 5341e426ffdSKuninori Morimoto } 5351e426ffdSKuninori Morimoto 5365095526fSSachin Kamat priv->base = devm_ioremap_resource(dev, res); 5371dc20828SKuninori Morimoto if (IS_ERR(priv->base)) { 5381dc20828SKuninori Morimoto ret = PTR_ERR(priv->base); 5391dc20828SKuninori Morimoto goto error_unregister; 5401dc20828SKuninori Morimoto } 5411e426ffdSKuninori Morimoto 5423676d1ddSKuninori Morimoto priv->common = common; 543e0a5172eSKuninori Morimoto priv->id = i; 5441969d9dcSYoshihiro Kaneko priv->chip = chip; 5453676d1ddSKuninori Morimoto mutex_init(&priv->lock); 5463676d1ddSKuninori Morimoto INIT_LIST_HEAD(&priv->list); 547e0a5172eSKuninori Morimoto INIT_DELAYED_WORK(&priv->work, rcar_thermal_work); 548a1ade565SKuninori Morimoto ret = rcar_thermal_update_temp(priv); 549a1ade565SKuninori Morimoto if (ret < 0) 550a1ade565SKuninori Morimoto goto error_unregister; 5513676d1ddSKuninori Morimoto 5521969d9dcSYoshihiro Kaneko if (chip->use_of_thermal) 5535e325868SEduardo Valentin priv->zone = devm_thermal_zone_of_sensor_register( 5548b477ea5SKuninori Morimoto dev, i, priv, 5558b477ea5SKuninori Morimoto &rcar_thermal_zone_of_ops); 5568b477ea5SKuninori Morimoto else 5578b477ea5SKuninori Morimoto priv->zone = thermal_zone_device_register( 5588b477ea5SKuninori Morimoto "rcar_thermal", 5593676d1ddSKuninori Morimoto 1, 0, priv, 560d2a73e22Skuninori.morimoto.gx@renesas.com &rcar_thermal_zone_ops, NULL, 0, 561e0a5172eSKuninori Morimoto idle); 5623676d1ddSKuninori Morimoto if (IS_ERR(priv->zone)) { 5633676d1ddSKuninori Morimoto dev_err(dev, "can't register thermal zone\n"); 564fb84d990SDevendra Naga ret = PTR_ERR(priv->zone); 56587260d3fSDirk Behme priv->zone = NULL; 5663676d1ddSKuninori Morimoto goto error_unregister; 5671e426ffdSKuninori Morimoto } 5681e426ffdSKuninori Morimoto 5691969d9dcSYoshihiro Kaneko if (chip->use_of_thermal) { 57064a411e8SKuninori Morimoto /* 57164a411e8SKuninori Morimoto * thermal_zone doesn't enable hwmon as default, 57264a411e8SKuninori Morimoto * but, enable it here to keep compatible 57364a411e8SKuninori Morimoto */ 57464a411e8SKuninori Morimoto priv->zone->tzp->no_hwmon = false; 57564a411e8SKuninori Morimoto ret = thermal_add_hwmon_sysfs(priv->zone); 57664a411e8SKuninori Morimoto if (ret) 57764a411e8SKuninori Morimoto goto error_unregister; 57864a411e8SKuninori Morimoto } 57964a411e8SKuninori Morimoto 580e0a5172eSKuninori Morimoto rcar_thermal_irq_enable(priv); 5811dc20828SKuninori Morimoto 5821dc20828SKuninori Morimoto list_move_tail(&priv->list, &common->head); 58311313746SYoshihiro Shimoda 58411313746SYoshihiro Shimoda /* update ENR bits */ 5851969d9dcSYoshihiro Kaneko if (!chip->irq_per_ch) 58611313746SYoshihiro Shimoda enr_bits |= 3 << (i * 8); 5873676d1ddSKuninori Morimoto } 5881e426ffdSKuninori Morimoto 589542cdf40SSimon Horman if (common->base && enr_bits) 59011313746SYoshihiro Shimoda rcar_thermal_common_write(common, ENR, enr_bits); 59111313746SYoshihiro Shimoda 5923db46c93SLaurent Pinchart dev_info(dev, "%d sensor probed\n", i); 5931e426ffdSKuninori Morimoto 5941e426ffdSKuninori Morimoto return 0; 5953676d1ddSKuninori Morimoto 5963676d1ddSKuninori Morimoto error_unregister: 59784f0e490SKuninori Morimoto rcar_thermal_remove(pdev); 59851d45d25SKuninori Morimoto 599fb84d990SDevendra Naga return ret; 6001e426ffdSKuninori Morimoto } 6011e426ffdSKuninori Morimoto 6021969d9dcSYoshihiro Kaneko #ifdef CONFIG_PM_SLEEP 6031969d9dcSYoshihiro Kaneko static int rcar_thermal_suspend(struct device *dev) 6041969d9dcSYoshihiro Kaneko { 6051969d9dcSYoshihiro Kaneko struct rcar_thermal_common *common = dev_get_drvdata(dev); 6061969d9dcSYoshihiro Kaneko struct rcar_thermal_priv *priv = list_first_entry(&common->head, 6071969d9dcSYoshihiro Kaneko typeof(*priv), list); 6081969d9dcSYoshihiro Kaneko 6091969d9dcSYoshihiro Kaneko if (priv->chip->needs_suspend_resume) { 6101969d9dcSYoshihiro Kaneko rcar_thermal_common_write(common, ENR, 0); 6111969d9dcSYoshihiro Kaneko rcar_thermal_irq_disable(priv); 6121969d9dcSYoshihiro Kaneko rcar_thermal_bset(priv, THSCR, CPCTL, 0); 6131969d9dcSYoshihiro Kaneko } 6141969d9dcSYoshihiro Kaneko 6151969d9dcSYoshihiro Kaneko return 0; 6161969d9dcSYoshihiro Kaneko } 6171969d9dcSYoshihiro Kaneko 6181969d9dcSYoshihiro Kaneko static int rcar_thermal_resume(struct device *dev) 6191969d9dcSYoshihiro Kaneko { 6201969d9dcSYoshihiro Kaneko struct rcar_thermal_common *common = dev_get_drvdata(dev); 6211969d9dcSYoshihiro Kaneko struct rcar_thermal_priv *priv = list_first_entry(&common->head, 6221969d9dcSYoshihiro Kaneko typeof(*priv), list); 6231969d9dcSYoshihiro Kaneko int ret; 6241969d9dcSYoshihiro Kaneko 6251969d9dcSYoshihiro Kaneko if (priv->chip->needs_suspend_resume) { 6261969d9dcSYoshihiro Kaneko ret = rcar_thermal_update_temp(priv); 6271969d9dcSYoshihiro Kaneko if (ret < 0) 6281969d9dcSYoshihiro Kaneko return ret; 6291969d9dcSYoshihiro Kaneko rcar_thermal_irq_enable(priv); 6301969d9dcSYoshihiro Kaneko rcar_thermal_common_write(common, ENR, 0x03); 6311969d9dcSYoshihiro Kaneko } 6321969d9dcSYoshihiro Kaneko 6331969d9dcSYoshihiro Kaneko return 0; 6341969d9dcSYoshihiro Kaneko } 6351969d9dcSYoshihiro Kaneko #endif 6361969d9dcSYoshihiro Kaneko 6371969d9dcSYoshihiro Kaneko static SIMPLE_DEV_PM_OPS(rcar_thermal_pm_ops, rcar_thermal_suspend, 6381969d9dcSYoshihiro Kaneko rcar_thermal_resume); 6391969d9dcSYoshihiro Kaneko 6401e426ffdSKuninori Morimoto static struct platform_driver rcar_thermal_driver = { 6411e426ffdSKuninori Morimoto .driver = { 6421e426ffdSKuninori Morimoto .name = "rcar_thermal", 6431969d9dcSYoshihiro Kaneko .pm = &rcar_thermal_pm_ops, 64476cc1887SKuninori Morimoto .of_match_table = rcar_thermal_dt_ids, 6451e426ffdSKuninori Morimoto }, 6461e426ffdSKuninori Morimoto .probe = rcar_thermal_probe, 6471e426ffdSKuninori Morimoto .remove = rcar_thermal_remove, 6481e426ffdSKuninori Morimoto }; 6491e426ffdSKuninori Morimoto module_platform_driver(rcar_thermal_driver); 6501e426ffdSKuninori Morimoto 651c9545790SKuninori Morimoto MODULE_LICENSE("GPL v2"); 6521e426ffdSKuninori Morimoto MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver"); 6531e426ffdSKuninori Morimoto MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 654