Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 1 | /* |
| 2 | * R-Car THS/TSC thermal sensor driver |
| 3 | * |
| 4 | * Copyright (C) 2012 Renesas Solutions Corp. |
| 5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 19 | */ |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/err.h> |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 22 | #include <linux/irq.h> |
| 23 | #include <linux/interrupt.h> |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 24 | #include <linux/io.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/platform_device.h> |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 27 | #include <linux/reboot.h> |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 28 | #include <linux/slab.h> |
| 29 | #include <linux/spinlock.h> |
| 30 | #include <linux/thermal.h> |
| 31 | |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 32 | #define IDLE_INTERVAL 5000 |
| 33 | |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 34 | #define COMMON_STR 0x00 |
| 35 | #define COMMON_ENR 0x04 |
| 36 | #define COMMON_INTMSK 0x0c |
| 37 | |
| 38 | #define REG_POSNEG 0x20 |
| 39 | #define REG_FILONOFF 0x28 |
Kuninori Morimoto | e9137a5 | 2013-01-31 09:03:46 +0000 | [diff] [blame] | 40 | #define REG_THSCR 0x2c |
| 41 | #define REG_THSSR 0x30 |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 42 | #define REG_INTCTRL 0x34 |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 43 | |
| 44 | /* THSCR */ |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 45 | #define CPCTL (1 << 12) |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 46 | |
| 47 | /* THSSR */ |
| 48 | #define CTEMP 0x3f |
| 49 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 50 | struct rcar_thermal_common { |
| 51 | void __iomem *base; |
| 52 | struct device *dev; |
| 53 | struct list_head head; |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 54 | spinlock_t lock; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 55 | }; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 56 | |
| 57 | struct rcar_thermal_priv { |
| 58 | void __iomem *base; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 59 | struct rcar_thermal_common *common; |
| 60 | struct thermal_zone_device *zone; |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 61 | struct delayed_work work; |
Kuninori Morimoto | b2bbc6a | 2013-01-31 09:03:22 +0000 | [diff] [blame] | 62 | struct mutex lock; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 63 | struct list_head list; |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 64 | int id; |
| 65 | int ctemp; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 66 | }; |
| 67 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 68 | #define rcar_thermal_for_each_priv(pos, common) \ |
| 69 | list_for_each_entry(pos, &common->head, list) |
| 70 | |
Kuninori Morimoto | c499703 | 2012-11-26 02:32:06 +0000 | [diff] [blame] | 71 | #define MCELSIUS(temp) ((temp) * 1000) |
Kuninori Morimoto | 9dde8f8 | 2013-01-31 09:02:51 +0000 | [diff] [blame] | 72 | #define rcar_zone_to_priv(zone) ((zone)->devdata) |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 73 | #define rcar_priv_to_dev(priv) ((priv)->common->dev) |
| 74 | #define rcar_has_irq_support(priv) ((priv)->common->base) |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 75 | #define rcar_id_to_shift(priv) ((priv)->id * 8) |
| 76 | |
| 77 | #ifdef DEBUG |
| 78 | # define rcar_force_update_temp(priv) 1 |
| 79 | #else |
| 80 | # define rcar_force_update_temp(priv) 0 |
| 81 | #endif |
Kuninori Morimoto | c499703 | 2012-11-26 02:32:06 +0000 | [diff] [blame] | 82 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 83 | /* |
| 84 | * basic functions |
| 85 | */ |
Kuninori Morimoto | e9137a5 | 2013-01-31 09:03:46 +0000 | [diff] [blame] | 86 | #define rcar_thermal_common_read(c, r) \ |
| 87 | _rcar_thermal_common_read(c, COMMON_ ##r) |
| 88 | static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common, |
| 89 | u32 reg) |
| 90 | { |
| 91 | return ioread32(common->base + reg); |
| 92 | } |
| 93 | |
| 94 | #define rcar_thermal_common_write(c, r, d) \ |
| 95 | _rcar_thermal_common_write(c, COMMON_ ##r, d) |
| 96 | static void _rcar_thermal_common_write(struct rcar_thermal_common *common, |
| 97 | u32 reg, u32 data) |
| 98 | { |
| 99 | iowrite32(data, common->base + reg); |
| 100 | } |
| 101 | |
| 102 | #define rcar_thermal_common_bset(c, r, m, d) \ |
| 103 | _rcar_thermal_common_bset(c, COMMON_ ##r, m, d) |
| 104 | static void _rcar_thermal_common_bset(struct rcar_thermal_common *common, |
| 105 | u32 reg, u32 mask, u32 data) |
| 106 | { |
| 107 | u32 val; |
| 108 | |
| 109 | val = ioread32(common->base + reg); |
| 110 | val &= ~mask; |
| 111 | val |= (data & mask); |
| 112 | iowrite32(val, common->base + reg); |
| 113 | } |
Kuninori Morimoto | e9137a5 | 2013-01-31 09:03:46 +0000 | [diff] [blame] | 114 | |
| 115 | #define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r) |
| 116 | static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg) |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 117 | { |
Kuninori Morimoto | b2bbc6a | 2013-01-31 09:03:22 +0000 | [diff] [blame] | 118 | return ioread32(priv->base + reg); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 119 | } |
| 120 | |
Kuninori Morimoto | e9137a5 | 2013-01-31 09:03:46 +0000 | [diff] [blame] | 121 | #define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d) |
| 122 | static void _rcar_thermal_write(struct rcar_thermal_priv *priv, |
| 123 | u32 reg, u32 data) |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 124 | { |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 125 | iowrite32(data, priv->base + reg); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 126 | } |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 127 | |
Kuninori Morimoto | e9137a5 | 2013-01-31 09:03:46 +0000 | [diff] [blame] | 128 | #define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d) |
| 129 | static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg, |
| 130 | u32 mask, u32 data) |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 131 | { |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 132 | u32 val; |
| 133 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 134 | val = ioread32(priv->base + reg); |
| 135 | val &= ~mask; |
| 136 | val |= (data & mask); |
| 137 | iowrite32(val, priv->base + reg); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | /* |
| 141 | * zone device functions |
| 142 | */ |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 143 | static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv) |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 144 | { |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 145 | struct device *dev = rcar_priv_to_dev(priv); |
| 146 | int i; |
| 147 | int ctemp, old, new; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 148 | |
Kuninori Morimoto | b2bbc6a | 2013-01-31 09:03:22 +0000 | [diff] [blame] | 149 | mutex_lock(&priv->lock); |
| 150 | |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 151 | /* |
| 152 | * TSC decides a value of CPTAP automatically, |
| 153 | * and this is the conditions which validate interrupt. |
| 154 | */ |
| 155 | rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 156 | |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 157 | ctemp = 0; |
| 158 | old = ~0; |
| 159 | for (i = 0; i < 128; i++) { |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 160 | /* |
| 161 | * we need to wait 300us after changing comparator offset |
| 162 | * to get stable temperature. |
| 163 | * see "Usage Notes" on datasheet |
| 164 | */ |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 165 | udelay(300); |
| 166 | |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 167 | new = rcar_thermal_read(priv, THSSR) & CTEMP; |
| 168 | if (new == old) { |
| 169 | ctemp = new; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 170 | break; |
| 171 | } |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 172 | old = new; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 173 | } |
| 174 | |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 175 | if (!ctemp) { |
| 176 | dev_err(dev, "thermal sensor was broken\n"); |
| 177 | return -EINVAL; |
| 178 | } |
| 179 | |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 180 | /* |
| 181 | * enable IRQ |
| 182 | */ |
| 183 | if (rcar_has_irq_support(priv)) { |
| 184 | rcar_thermal_write(priv, FILONOFF, 0); |
Kuninori Morimoto | f8f53e1 | 2013-01-31 09:03:11 +0000 | [diff] [blame] | 185 | |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 186 | /* enable Rising/Falling edge interrupt */ |
| 187 | rcar_thermal_write(priv, POSNEG, 0x1); |
| 188 | rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) | |
| 189 | ((ctemp - 1) << 0))); |
| 190 | } |
| 191 | |
| 192 | dev_dbg(dev, "thermal%d %d -> %d\n", priv->id, priv->ctemp, ctemp); |
| 193 | |
| 194 | priv->ctemp = ctemp; |
| 195 | |
| 196 | mutex_unlock(&priv->lock); |
| 197 | |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int rcar_thermal_get_temp(struct thermal_zone_device *zone, |
| 202 | unsigned long *temp) |
| 203 | { |
| 204 | struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); |
| 205 | |
| 206 | if (!rcar_has_irq_support(priv) || rcar_force_update_temp(priv)) |
| 207 | rcar_thermal_update_temp(priv); |
| 208 | |
| 209 | mutex_lock(&priv->lock); |
| 210 | *temp = MCELSIUS((priv->ctemp * 5) - 65); |
Kuninori Morimoto | b2bbc6a | 2013-01-31 09:03:22 +0000 | [diff] [blame] | 211 | mutex_unlock(&priv->lock); |
| 212 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 213 | return 0; |
| 214 | } |
| 215 | |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 216 | static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone, |
| 217 | int trip, enum thermal_trip_type *type) |
| 218 | { |
| 219 | struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 220 | struct device *dev = rcar_priv_to_dev(priv); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 221 | |
| 222 | /* see rcar_thermal_get_temp() */ |
| 223 | switch (trip) { |
| 224 | case 0: /* +90 <= temp */ |
| 225 | *type = THERMAL_TRIP_CRITICAL; |
| 226 | break; |
| 227 | default: |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 228 | dev_err(dev, "rcar driver trip error\n"); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 229 | return -EINVAL; |
| 230 | } |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone, |
| 236 | int trip, unsigned long *temp) |
| 237 | { |
| 238 | struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 239 | struct device *dev = rcar_priv_to_dev(priv); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 240 | |
| 241 | /* see rcar_thermal_get_temp() */ |
| 242 | switch (trip) { |
| 243 | case 0: /* +90 <= temp */ |
| 244 | *temp = MCELSIUS(90); |
| 245 | break; |
| 246 | default: |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 247 | dev_err(dev, "rcar driver trip error\n"); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 248 | return -EINVAL; |
| 249 | } |
| 250 | |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | static int rcar_thermal_notify(struct thermal_zone_device *zone, |
| 255 | int trip, enum thermal_trip_type type) |
| 256 | { |
| 257 | struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 258 | struct device *dev = rcar_priv_to_dev(priv); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 259 | |
| 260 | switch (type) { |
| 261 | case THERMAL_TRIP_CRITICAL: |
| 262 | /* FIXME */ |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 263 | dev_warn(dev, "Thermal reached to critical temperature\n"); |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 264 | break; |
| 265 | default: |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | return 0; |
| 270 | } |
| 271 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 272 | static struct thermal_zone_device_ops rcar_thermal_zone_ops = { |
kuninori.morimoto.gx@renesas.com | d2a73e2 | 2012-12-02 18:48:41 -0800 | [diff] [blame] | 273 | .get_temp = rcar_thermal_get_temp, |
| 274 | .get_trip_type = rcar_thermal_get_trip_type, |
| 275 | .get_trip_temp = rcar_thermal_get_trip_temp, |
| 276 | .notify = rcar_thermal_notify, |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 277 | }; |
| 278 | |
| 279 | /* |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 280 | * interrupt |
| 281 | */ |
| 282 | #define rcar_thermal_irq_enable(p) _rcar_thermal_irq_ctrl(p, 1) |
| 283 | #define rcar_thermal_irq_disable(p) _rcar_thermal_irq_ctrl(p, 0) |
| 284 | static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable) |
| 285 | { |
| 286 | struct rcar_thermal_common *common = priv->common; |
| 287 | unsigned long flags; |
| 288 | u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */ |
| 289 | |
| 290 | spin_lock_irqsave(&common->lock, flags); |
| 291 | |
| 292 | rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask); |
| 293 | |
| 294 | spin_unlock_irqrestore(&common->lock, flags); |
| 295 | } |
| 296 | |
| 297 | static void rcar_thermal_work(struct work_struct *work) |
| 298 | { |
| 299 | struct rcar_thermal_priv *priv; |
| 300 | |
| 301 | priv = container_of(work, struct rcar_thermal_priv, work.work); |
| 302 | |
| 303 | rcar_thermal_update_temp(priv); |
| 304 | rcar_thermal_irq_enable(priv); |
| 305 | thermal_zone_device_update(priv->zone); |
| 306 | } |
| 307 | |
| 308 | static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status) |
| 309 | { |
| 310 | struct device *dev = rcar_priv_to_dev(priv); |
| 311 | |
| 312 | status = (status >> rcar_id_to_shift(priv)) & 0x3; |
| 313 | |
| 314 | if (status & 0x3) { |
| 315 | dev_dbg(dev, "thermal%d %s%s\n", |
| 316 | priv->id, |
| 317 | (status & 0x2) ? "Rising " : "", |
| 318 | (status & 0x1) ? "Falling" : ""); |
| 319 | } |
| 320 | |
| 321 | return status; |
| 322 | } |
| 323 | |
| 324 | static irqreturn_t rcar_thermal_irq(int irq, void *data) |
| 325 | { |
| 326 | struct rcar_thermal_common *common = data; |
| 327 | struct rcar_thermal_priv *priv; |
| 328 | unsigned long flags; |
| 329 | u32 status, mask; |
| 330 | |
| 331 | spin_lock_irqsave(&common->lock, flags); |
| 332 | |
| 333 | mask = rcar_thermal_common_read(common, INTMSK); |
| 334 | status = rcar_thermal_common_read(common, STR); |
| 335 | rcar_thermal_common_write(common, STR, 0x000F0F0F & mask); |
| 336 | |
| 337 | spin_unlock_irqrestore(&common->lock, flags); |
| 338 | |
| 339 | status = status & ~mask; |
| 340 | |
| 341 | /* |
| 342 | * check the status |
| 343 | */ |
| 344 | rcar_thermal_for_each_priv(priv, common) { |
| 345 | if (rcar_thermal_had_changed(priv, status)) { |
| 346 | rcar_thermal_irq_disable(priv); |
| 347 | schedule_delayed_work(&priv->work, |
| 348 | msecs_to_jiffies(300)); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | return IRQ_HANDLED; |
| 353 | } |
| 354 | |
| 355 | /* |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 356 | * platform functions |
| 357 | */ |
| 358 | static int rcar_thermal_probe(struct platform_device *pdev) |
| 359 | { |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 360 | struct rcar_thermal_common *common; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 361 | struct rcar_thermal_priv *priv; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 362 | struct device *dev = &pdev->dev; |
| 363 | struct resource *res, *irq; |
| 364 | int mres = 0; |
| 365 | int i; |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 366 | int idle = IDLE_INTERVAL; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 367 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 368 | common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL); |
| 369 | if (!common) { |
| 370 | dev_err(dev, "Could not allocate common\n"); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 371 | return -ENOMEM; |
| 372 | } |
| 373 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 374 | INIT_LIST_HEAD(&common->head); |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 375 | spin_lock_init(&common->lock); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 376 | common->dev = dev; |
| 377 | |
| 378 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 379 | if (irq) { |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 380 | int ret; |
| 381 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 382 | /* |
| 383 | * platform has IRQ support. |
| 384 | * Then, drier use common register |
| 385 | */ |
| 386 | res = platform_get_resource(pdev, IORESOURCE_MEM, mres++); |
| 387 | if (!res) { |
| 388 | dev_err(dev, "Could not get platform resource\n"); |
| 389 | return -ENODEV; |
| 390 | } |
| 391 | |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 392 | ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 0, |
| 393 | dev_name(dev), common); |
| 394 | if (ret) { |
| 395 | dev_err(dev, "irq request failed\n "); |
| 396 | return ret; |
| 397 | } |
| 398 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 399 | /* |
| 400 | * rcar_has_irq_support() will be enabled |
| 401 | */ |
| 402 | common->base = devm_request_and_ioremap(dev, res); |
| 403 | if (!common->base) { |
| 404 | dev_err(dev, "Unable to ioremap thermal register\n"); |
| 405 | return -ENOMEM; |
| 406 | } |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 407 | |
| 408 | /* enable temperature comparation */ |
| 409 | rcar_thermal_common_write(common, ENR, 0x00030303); |
| 410 | |
| 411 | idle = 0; /* polling delaye is not needed */ |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 412 | } |
| 413 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 414 | for (i = 0;; i++) { |
| 415 | res = platform_get_resource(pdev, IORESOURCE_MEM, mres++); |
| 416 | if (!res) |
| 417 | break; |
| 418 | |
| 419 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| 420 | if (!priv) { |
| 421 | dev_err(dev, "Could not allocate priv\n"); |
| 422 | return -ENOMEM; |
| 423 | } |
| 424 | |
| 425 | priv->base = devm_request_and_ioremap(dev, res); |
| 426 | if (!priv->base) { |
| 427 | dev_err(dev, "Unable to ioremap priv register\n"); |
| 428 | return -ENOMEM; |
| 429 | } |
| 430 | |
| 431 | priv->common = common; |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 432 | priv->id = i; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 433 | mutex_init(&priv->lock); |
| 434 | INIT_LIST_HEAD(&priv->list); |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 435 | INIT_DELAYED_WORK(&priv->work, rcar_thermal_work); |
| 436 | rcar_thermal_update_temp(priv); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 437 | |
| 438 | priv->zone = thermal_zone_device_register("rcar_thermal", |
| 439 | 1, 0, priv, |
| 440 | &rcar_thermal_zone_ops, NULL, 0, |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 441 | idle); |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 442 | if (IS_ERR(priv->zone)) { |
| 443 | dev_err(dev, "can't register thermal zone\n"); |
| 444 | goto error_unregister; |
| 445 | } |
| 446 | |
| 447 | list_move_tail(&priv->list, &common->head); |
Kuninori Morimoto | e0a5172 | 2013-01-31 09:04:48 +0000 | [diff] [blame] | 448 | |
| 449 | if (rcar_has_irq_support(priv)) |
| 450 | rcar_thermal_irq_enable(priv); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 451 | } |
| 452 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 453 | platform_set_drvdata(pdev, common); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 454 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 455 | dev_info(dev, "%d sensor proved\n", i); |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 456 | |
| 457 | return 0; |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 458 | |
| 459 | error_unregister: |
| 460 | rcar_thermal_for_each_priv(priv, common) |
| 461 | thermal_zone_device_unregister(priv->zone); |
| 462 | |
| 463 | return -ENODEV; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | static int rcar_thermal_remove(struct platform_device *pdev) |
| 467 | { |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 468 | struct rcar_thermal_common *common = platform_get_drvdata(pdev); |
| 469 | struct rcar_thermal_priv *priv; |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 470 | |
Kuninori Morimoto | 3676d1d | 2013-01-31 09:03:33 +0000 | [diff] [blame] | 471 | rcar_thermal_for_each_priv(priv, common) |
| 472 | thermal_zone_device_unregister(priv->zone); |
| 473 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 474 | platform_set_drvdata(pdev, NULL); |
| 475 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 476 | return 0; |
| 477 | } |
| 478 | |
Kuninori Morimoto | 76cc188 | 2013-01-31 09:05:26 +0000 | [diff] [blame^] | 479 | static const struct of_device_id rcar_thermal_dt_ids[] __devinitconst = { |
| 480 | { .compatible = "renesas,rcar-thermal", }, |
| 481 | {}, |
| 482 | }; |
| 483 | MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids); |
| 484 | |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 485 | static struct platform_driver rcar_thermal_driver = { |
| 486 | .driver = { |
| 487 | .name = "rcar_thermal", |
Kuninori Morimoto | 76cc188 | 2013-01-31 09:05:26 +0000 | [diff] [blame^] | 488 | .of_match_table = rcar_thermal_dt_ids, |
Kuninori Morimoto | 1e426ff | 2012-07-21 10:53:48 +1000 | [diff] [blame] | 489 | }, |
| 490 | .probe = rcar_thermal_probe, |
| 491 | .remove = rcar_thermal_remove, |
| 492 | }; |
| 493 | module_platform_driver(rcar_thermal_driver); |
| 494 | |
| 495 | MODULE_LICENSE("GPL"); |
| 496 | MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver"); |
| 497 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |