drivers/hwmon/npcm750-pwm-fan.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2014-2018 Nuvoton Technology corporation.
   3
   4 #include <linux/clk.h>
   5 #include <linux/device.h>
   6 #include <linux/hwmon.h>
   7 #include <linux/hwmon-sysfs.h>
   8 #include <linux/interrupt.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/of_address.h>
  12 #include <linux/of_irq.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/sysfs.h>
  16 #include <linux/thermal.h>
  17
  18 /* NPCM7XX PWM registers */
  19 #define NPCM7XX_PWM_REG_BASE(base, n)    ((base) + ((n) * 0x1000L))
  20
  21 #define NPCM7XX_PWM_REG_PR(base, n)     (NPCM7XX_PWM_REG_BASE(base, n) + 0x00)
  22 #define NPCM7XX_PWM_REG_CSR(base, n)    (NPCM7XX_PWM_REG_BASE(base, n) + 0x04)
  23 #define NPCM7XX_PWM_REG_CR(base, n)     (NPCM7XX_PWM_REG_BASE(base, n) + 0x08)
  24 #define NPCM7XX_PWM_REG_CNRx(base, n, ch) \
  25                         (NPCM7XX_PWM_REG_BASE(base, n) + 0x0C + (12 * (ch)))
  26 #define NPCM7XX_PWM_REG_CMRx(base, n, ch) \
  27                         (NPCM7XX_PWM_REG_BASE(base, n) + 0x10 + (12 * (ch)))
  28 #define NPCM7XX_PWM_REG_PDRx(base, n, ch) \
  29                         (NPCM7XX_PWM_REG_BASE(base, n) + 0x14 + (12 * (ch)))
  30 #define NPCM7XX_PWM_REG_PIER(base, n)   (NPCM7XX_PWM_REG_BASE(base, n) + 0x3C)
  31 #define NPCM7XX_PWM_REG_PIIR(base, n)   (NPCM7XX_PWM_REG_BASE(base, n) + 0x40)
  32
  33 #define NPCM7XX_PWM_CTRL_CH0_MODE_BIT           BIT(3)
  34 #define NPCM7XX_PWM_CTRL_CH1_MODE_BIT           BIT(11)
  35 #define NPCM7XX_PWM_CTRL_CH2_MODE_BIT           BIT(15)
  36 #define NPCM7XX_PWM_CTRL_CH3_MODE_BIT           BIT(19)
  37
  38 #define NPCM7XX_PWM_CTRL_CH0_INV_BIT            BIT(2)
  39 #define NPCM7XX_PWM_CTRL_CH1_INV_BIT            BIT(10)
  40 #define NPCM7XX_PWM_CTRL_CH2_INV_BIT            BIT(14)
  41 #define NPCM7XX_PWM_CTRL_CH3_INV_BIT            BIT(18)
  42
  43 #define NPCM7XX_PWM_CTRL_CH0_EN_BIT             BIT(0)
  44 #define NPCM7XX_PWM_CTRL_CH1_EN_BIT             BIT(8)
  45 #define NPCM7XX_PWM_CTRL_CH2_EN_BIT             BIT(12)
  46 #define NPCM7XX_PWM_CTRL_CH3_EN_BIT             BIT(16)
  47
  48 /* Define the maximum PWM channel number */
  49 #define NPCM7XX_PWM_MAX_CHN_NUM                 12
  50 #define NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE     4
  51 #define NPCM7XX_PWM_MAX_MODULES                 3
  52
  53 /* Define the Counter Register, value = 100 for match 100% */
  54 #define NPCM7XX_PWM_COUNTER_DEFAULT_NUM         255
  55 #define NPCM7XX_PWM_CMR_DEFAULT_NUM             255
  56 #define NPCM7XX_PWM_CMR_MAX                     255
  57
  58 /* default all PWM channels PRESCALE2 = 1 */
  59 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0       0x4
  60 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1       0x40
  61 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2       0x400
  62 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3       0x4000
  63
  64 #define PWM_OUTPUT_FREQ_25KHZ                   25000
  65 #define PWN_CNT_DEFAULT                         256
  66 #define MIN_PRESCALE1                           2
  67 #define NPCM7XX_PWM_PRESCALE_SHIFT_CH01         8
  68
  69 #define NPCM7XX_PWM_PRESCALE2_DEFAULT   (NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0 | \
  70                                         NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1 | \
  71                                         NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2 | \
  72                                         NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3)
  73
  74 #define NPCM7XX_PWM_CTRL_MODE_DEFAULT   (NPCM7XX_PWM_CTRL_CH0_MODE_BIT | \
  75                                         NPCM7XX_PWM_CTRL_CH1_MODE_BIT | \
  76                                         NPCM7XX_PWM_CTRL_CH2_MODE_BIT | \
  77                                         NPCM7XX_PWM_CTRL_CH3_MODE_BIT)
  78
  79 /* NPCM7XX FAN Tacho registers */
  80 #define NPCM7XX_FAN_REG_BASE(base, n)   ((base) + ((n) * 0x1000L))
  81
  82 #define NPCM7XX_FAN_REG_TCNT1(base, n)    (NPCM7XX_FAN_REG_BASE(base, n) + 0x00)
  83 #define NPCM7XX_FAN_REG_TCRA(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x02)
  84 #define NPCM7XX_FAN_REG_TCRB(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x04)
  85 #define NPCM7XX_FAN_REG_TCNT2(base, n)    (NPCM7XX_FAN_REG_BASE(base, n) + 0x06)
  86 #define NPCM7XX_FAN_REG_TPRSC(base, n)    (NPCM7XX_FAN_REG_BASE(base, n) + 0x08)
  87 #define NPCM7XX_FAN_REG_TCKC(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x0A)
  88 #define NPCM7XX_FAN_REG_TMCTRL(base, n)   (NPCM7XX_FAN_REG_BASE(base, n) + 0x0C)
  89 #define NPCM7XX_FAN_REG_TICTRL(base, n)   (NPCM7XX_FAN_REG_BASE(base, n) + 0x0E)
  90 #define NPCM7XX_FAN_REG_TICLR(base, n)    (NPCM7XX_FAN_REG_BASE(base, n) + 0x10)
  91 #define NPCM7XX_FAN_REG_TIEN(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x12)
  92 #define NPCM7XX_FAN_REG_TCPA(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x14)
  93 #define NPCM7XX_FAN_REG_TCPB(base, n)     (NPCM7XX_FAN_REG_BASE(base, n) + 0x16)
  94 #define NPCM7XX_FAN_REG_TCPCFG(base, n)   (NPCM7XX_FAN_REG_BASE(base, n) + 0x18)
  95 #define NPCM7XX_FAN_REG_TINASEL(base, n)  (NPCM7XX_FAN_REG_BASE(base, n) + 0x1A)
  96 #define NPCM7XX_FAN_REG_TINBSEL(base, n)  (NPCM7XX_FAN_REG_BASE(base, n) + 0x1C)
  97
  98 #define NPCM7XX_FAN_TCKC_CLKX_NONE      0
  99 #define NPCM7XX_FAN_TCKC_CLK1_APB       BIT(0)
 100 #define NPCM7XX_FAN_TCKC_CLK2_APB       BIT(3)
 101
 102 #define NPCM7XX_FAN_TMCTRL_TBEN         BIT(6)
 103 #define NPCM7XX_FAN_TMCTRL_TAEN         BIT(5)
 104 #define NPCM7XX_FAN_TMCTRL_TBEDG        BIT(4)
 105 #define NPCM7XX_FAN_TMCTRL_TAEDG        BIT(3)
 106 #define NPCM7XX_FAN_TMCTRL_MODE_5       BIT(2)
 107
 108 #define NPCM7XX_FAN_TICLR_CLEAR_ALL     GENMASK(5, 0)
 109 #define NPCM7XX_FAN_TICLR_TFCLR         BIT(5)
 110 #define NPCM7XX_FAN_TICLR_TECLR         BIT(4)
 111 #define NPCM7XX_FAN_TICLR_TDCLR         BIT(3)
 112 #define NPCM7XX_FAN_TICLR_TCCLR         BIT(2)
 113 #define NPCM7XX_FAN_TICLR_TBCLR         BIT(1)
 114 #define NPCM7XX_FAN_TICLR_TACLR         BIT(0)
 115
 116 #define NPCM7XX_FAN_TIEN_ENABLE_ALL     GENMASK(5, 0)
 117 #define NPCM7XX_FAN_TIEN_TFIEN          BIT(5)
 118 #define NPCM7XX_FAN_TIEN_TEIEN          BIT(4)
 119 #define NPCM7XX_FAN_TIEN_TDIEN          BIT(3)
 120 #define NPCM7XX_FAN_TIEN_TCIEN          BIT(2)
 121 #define NPCM7XX_FAN_TIEN_TBIEN          BIT(1)
 122 #define NPCM7XX_FAN_TIEN_TAIEN          BIT(0)
 123
 124 #define NPCM7XX_FAN_TICTRL_TFPND        BIT(5)
 125 #define NPCM7XX_FAN_TICTRL_TEPND        BIT(4)
 126 #define NPCM7XX_FAN_TICTRL_TDPND        BIT(3)
 127 #define NPCM7XX_FAN_TICTRL_TCPND        BIT(2)
 128 #define NPCM7XX_FAN_TICTRL_TBPND        BIT(1)
 129 #define NPCM7XX_FAN_TICTRL_TAPND        BIT(0)
 130
 131 #define NPCM7XX_FAN_TCPCFG_HIBEN        BIT(7)
 132 #define NPCM7XX_FAN_TCPCFG_EQBEN        BIT(6)
 133 #define NPCM7XX_FAN_TCPCFG_LOBEN        BIT(5)
 134 #define NPCM7XX_FAN_TCPCFG_CPBSEL       BIT(4)
 135 #define NPCM7XX_FAN_TCPCFG_HIAEN        BIT(3)
 136 #define NPCM7XX_FAN_TCPCFG_EQAEN        BIT(2)
 137 #define NPCM7XX_FAN_TCPCFG_LOAEN        BIT(1)
 138 #define NPCM7XX_FAN_TCPCFG_CPASEL       BIT(0)
 139
 140 /* FAN General Definition */
 141 /* Define the maximum FAN channel number */
 142 #define NPCM7XX_FAN_MAX_MODULE                  8
 143 #define NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE     2
 144 #define NPCM7XX_FAN_MAX_CHN_NUM                 16
 145
 146 /*
 147  * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us)
 148  * Timeout 94ms ~= 0x5000
 149  * (The minimum FAN speed could to support ~640RPM/pulse 1,
 150  * 320RPM/pulse 2, ...-- 10.6Hz)
 151  */
 152 #define NPCM7XX_FAN_TIMEOUT     0x5000
 153 #define NPCM7XX_FAN_TCNT        0xFFFF
 154 #define NPCM7XX_FAN_TCPA        (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT)
 155 #define NPCM7XX_FAN_TCPB        (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT)
 156
 157 #define NPCM7XX_FAN_POLL_TIMER_200MS                    200
 158 #define NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION        2
 159 #define NPCM7XX_FAN_TINASEL_FANIN_DEFAULT               0
 160 #define NPCM7XX_FAN_CLK_PRESCALE                        255
 161
 162 #define NPCM7XX_FAN_CMPA                                0
 163 #define NPCM7XX_FAN_CMPB                                1
 164
 165 /* Obtain the fan number */
 166 #define NPCM7XX_FAN_INPUT(fan, cmp)             (((fan) << 1) + (cmp))
 167
 168 /* fan sample status */
 169 #define FAN_DISABLE                             0xFF
 170 #define FAN_INIT                                0x00
 171 #define FAN_PREPARE_TO_GET_FIRST_CAPTURE        0x01
 172 #define FAN_ENOUGH_SAMPLE                       0x02
 173
 174 struct npcm_hwmon_info {
 175         u32 pwm_max_channel;
 176 };
 177
 178 struct npcm7xx_fan_dev {
 179         u8 fan_st_flg;
 180         u8 fan_pls_per_rev;
 181         u16 fan_cnt;
 182         u32 fan_cnt_tmp;
 183 };
 184
 185 struct npcm7xx_cooling_device {
 186         char name[THERMAL_NAME_LENGTH];
 187         struct npcm7xx_pwm_fan_data *data;
 188         struct thermal_cooling_device *tcdev;
 189         int pwm_port;
 190         u8 *cooling_levels;
 191         u8 max_state;
 192         u8 cur_state;
 193 };
 194
 195 struct npcm7xx_pwm_fan_data {
 196         void __iomem *pwm_base;
 197         void __iomem *fan_base;
 198         unsigned long pwm_clk_freq;
 199         unsigned long fan_clk_freq;
 200         struct clk *pwm_clk;
 201         struct clk *fan_clk;
 202         struct mutex pwm_lock[NPCM7XX_PWM_MAX_MODULES];
 203         spinlock_t fan_lock[NPCM7XX_FAN_MAX_MODULE];
 204         int fan_irq[NPCM7XX_FAN_MAX_MODULE];
 205         bool pwm_present[NPCM7XX_PWM_MAX_CHN_NUM];
 206         bool fan_present[NPCM7XX_FAN_MAX_CHN_NUM];
 207         u32 input_clk_freq;
 208         struct timer_list fan_timer;
 209         struct npcm7xx_fan_dev fan_dev[NPCM7XX_FAN_MAX_CHN_NUM];
 210         struct npcm7xx_cooling_device *cdev[NPCM7XX_PWM_MAX_CHN_NUM];
 211         const struct npcm_hwmon_info *info;
 212         u8 fan_select;
 213 };
 214
 215 static int npcm7xx_pwm_config_set(struct npcm7xx_pwm_fan_data *data,
 216                                   int channel, u16 val)
 217 {
 218         u32 pwm_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE);
 219         u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE);
 220         u32 tmp_buf, ctrl_en_bit, env_bit;
 221
 222         /*
 223          * Config PWM Comparator register for setting duty cycle
 224          */
 225         mutex_lock(&data->pwm_lock[module]);
 226
 227         /* write new CMR value  */
 228         iowrite32(val, NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pwm_ch));
 229         tmp_buf = ioread32(NPCM7XX_PWM_REG_CR(data->pwm_base, module));
 230
 231         switch (pwm_ch) {
 232         case 0:
 233                 ctrl_en_bit = NPCM7XX_PWM_CTRL_CH0_EN_BIT;
 234                 env_bit = NPCM7XX_PWM_CTRL_CH0_INV_BIT;
 235                 break;
 236         case 1:
 237                 ctrl_en_bit = NPCM7XX_PWM_CTRL_CH1_EN_BIT;
 238                 env_bit = NPCM7XX_PWM_CTRL_CH1_INV_BIT;
 239                 break;
 240         case 2:
 241                 ctrl_en_bit = NPCM7XX_PWM_CTRL_CH2_EN_BIT;
 242                 env_bit = NPCM7XX_PWM_CTRL_CH2_INV_BIT;
 243                 break;
 244         case 3:
 245                 ctrl_en_bit = NPCM7XX_PWM_CTRL_CH3_EN_BIT;
 246                 env_bit = NPCM7XX_PWM_CTRL_CH3_INV_BIT;
 247                 break;
 248         default:
 249                 mutex_unlock(&data->pwm_lock[module]);
 250                 return -ENODEV;
 251         }
 252
 253         if (val == 0) {
 254                 /* Disable PWM */
 255                 tmp_buf &= ~ctrl_en_bit;
 256                 tmp_buf |= env_bit;
 257         } else {
 258                 /* Enable PWM */
 259                 tmp_buf |= ctrl_en_bit;
 260                 tmp_buf &= ~env_bit;
 261         }
 262
 263         iowrite32(tmp_buf, NPCM7XX_PWM_REG_CR(data->pwm_base, module));
 264         mutex_unlock(&data->pwm_lock[module]);
 265
 266         return 0;
 267 }
 268
 269 static inline void npcm7xx_fan_start_capture(struct npcm7xx_pwm_fan_data *data,
 270                                              u8 fan, u8 cmp)
 271 {
 272         u8 fan_id;
 273         u8 reg_mode;
 274         u8 reg_int;
 275         unsigned long flags;
 276
 277         fan_id = NPCM7XX_FAN_INPUT(fan, cmp);
 278
 279         /* to check whether any fan tach is enable */
 280         if (data->fan_dev[fan_id].fan_st_flg != FAN_DISABLE) {
 281                 /* reset status */
 282                 spin_lock_irqsave(&data->fan_lock[fan], flags);
 283
 284                 data->fan_dev[fan_id].fan_st_flg = FAN_INIT;
 285                 reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 286
 287                 /*
 288                  * the interrupt enable bits do not need to be cleared before
 289                  * it sets, the interrupt enable bits are cleared only on reset.
 290                  * the clock unit control register is behaving in the same
 291                  * manner that the interrupt enable register behave.
 292                  */
 293                 if (cmp == NPCM7XX_FAN_CMPA) {
 294                         /* enable interrupt */
 295                         iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TAIEN |
 296                                             NPCM7XX_FAN_TIEN_TEIEN),
 297                                  NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 298
 299                         reg_mode = NPCM7XX_FAN_TCKC_CLK1_APB
 300                                 | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base,
 301                                                                fan));
 302
 303                         /* start to Capture */
 304                         iowrite8(reg_mode, NPCM7XX_FAN_REG_TCKC(data->fan_base,
 305                                                                 fan));
 306                 } else {
 307                         /* enable interrupt */
 308                         iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TBIEN |
 309                                             NPCM7XX_FAN_TIEN_TFIEN),
 310                                  NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 311
 312                         reg_mode =
 313                                 NPCM7XX_FAN_TCKC_CLK2_APB
 314                                 | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base,
 315                                                                fan));
 316
 317                         /* start to Capture */
 318                         iowrite8(reg_mode,
 319                                  NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));
 320                 }
 321
 322                 spin_unlock_irqrestore(&data->fan_lock[fan], flags);
 323         }
 324 }
 325
 326 /*
 327  * Enable a background timer to poll fan tach value, (200ms * 4)
 328  * to polling all fan
 329  */
 330 static void npcm7xx_fan_polling(struct timer_list *t)
 331 {
 332         struct npcm7xx_pwm_fan_data *data;
 333         int i;
 334
 335         data = from_timer(data, t, fan_timer);
 336
 337         /*
 338          * Polling two module per one round,
 339          * FAN01 & FAN89 / FAN23 & FAN1011 / FAN45 & FAN1213 / FAN67 & FAN1415
 340          */
 341         for (i = data->fan_select; i < NPCM7XX_FAN_MAX_MODULE;
 342               i = i + 4) {
 343                 /* clear the flag and reset the counter (TCNT) */
 344                 iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL,
 345                          NPCM7XX_FAN_REG_TICLR(data->fan_base, i));
 346
 347                 if (data->fan_present[i * 2]) {
 348                         iowrite16(NPCM7XX_FAN_TCNT,
 349                                   NPCM7XX_FAN_REG_TCNT1(data->fan_base, i));
 350                         npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPA);
 351                 }
 352                 if (data->fan_present[(i * 2) + 1]) {
 353                         iowrite16(NPCM7XX_FAN_TCNT,
 354                                   NPCM7XX_FAN_REG_TCNT2(data->fan_base, i));
 355                         npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPB);
 356                 }
 357         }
 358
 359         data->fan_select++;
 360         data->fan_select &= 0x3;
 361
 362         /* reset the timer interval */
 363         data->fan_timer.expires = jiffies +
 364                 msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS);
 365         add_timer(&data->fan_timer);
 366 }
 367
 368 static inline void npcm7xx_fan_compute(struct npcm7xx_pwm_fan_data *data,
 369                                        u8 fan, u8 cmp, u8 fan_id, u8 flag_int,
 370                                        u8 flag_mode, u8 flag_clear)
 371 {
 372         u8  reg_int;
 373         u8  reg_mode;
 374         u16 fan_cap;
 375
 376         if (cmp == NPCM7XX_FAN_CMPA)
 377                 fan_cap = ioread16(NPCM7XX_FAN_REG_TCRA(data->fan_base, fan));
 378         else
 379                 fan_cap = ioread16(NPCM7XX_FAN_REG_TCRB(data->fan_base, fan));
 380
 381         /* clear capature flag, H/W will auto reset the NPCM7XX_FAN_TCNTx */
 382         iowrite8(flag_clear, NPCM7XX_FAN_REG_TICLR(data->fan_base, fan));
 383
 384         if (data->fan_dev[fan_id].fan_st_flg == FAN_INIT) {
 385                 /* First capture, drop it */
 386                 data->fan_dev[fan_id].fan_st_flg =
 387                         FAN_PREPARE_TO_GET_FIRST_CAPTURE;
 388
 389                 /* reset counter */
 390                 data->fan_dev[fan_id].fan_cnt_tmp = 0;
 391         } else if (data->fan_dev[fan_id].fan_st_flg < FAN_ENOUGH_SAMPLE) {
 392                 /*
 393                  * collect the enough sample,
 394                  * (ex: 2 pulse fan need to get 2 sample)
 395                  */
 396                 data->fan_dev[fan_id].fan_cnt_tmp +=
 397                         (NPCM7XX_FAN_TCNT - fan_cap);
 398
 399                 data->fan_dev[fan_id].fan_st_flg++;
 400         } else {
 401                 /* get enough sample or fan disable */
 402                 if (data->fan_dev[fan_id].fan_st_flg == FAN_ENOUGH_SAMPLE) {
 403                         data->fan_dev[fan_id].fan_cnt_tmp +=
 404                                 (NPCM7XX_FAN_TCNT - fan_cap);
 405
 406                         /* compute finial average cnt per pulse */
 407                         data->fan_dev[fan_id].fan_cnt =
 408                                 data->fan_dev[fan_id].fan_cnt_tmp /
 409                                 FAN_ENOUGH_SAMPLE;
 410
 411                         data->fan_dev[fan_id].fan_st_flg = FAN_INIT;
 412                 }
 413
 414                 reg_int =  ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 415
 416                 /* disable interrupt */
 417                 iowrite8((reg_int & ~flag_int),
 418                          NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 419                 reg_mode =  ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));
 420
 421                 /* stop capturing */
 422                 iowrite8((reg_mode & ~flag_mode),
 423                          NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));
 424         }
 425 }
 426
 427 static inline void npcm7xx_check_cmp(struct npcm7xx_pwm_fan_data *data,
 428                                      u8 fan, u8 cmp, u8 flag)
 429 {
 430         u8 reg_int;
 431         u8 reg_mode;
 432         u8 flag_timeout;
 433         u8 flag_cap;
 434         u8 flag_clear;
 435         u8 flag_int;
 436         u8 flag_mode;
 437         u8 fan_id;
 438
 439         fan_id = NPCM7XX_FAN_INPUT(fan, cmp);
 440
 441         if (cmp == NPCM7XX_FAN_CMPA) {
 442                 flag_cap = NPCM7XX_FAN_TICTRL_TAPND;
 443                 flag_timeout = NPCM7XX_FAN_TICTRL_TEPND;
 444                 flag_int = NPCM7XX_FAN_TIEN_TAIEN | NPCM7XX_FAN_TIEN_TEIEN;
 445                 flag_mode = NPCM7XX_FAN_TCKC_CLK1_APB;
 446                 flag_clear = NPCM7XX_FAN_TICLR_TACLR | NPCM7XX_FAN_TICLR_TECLR;
 447         } else {
 448                 flag_cap = NPCM7XX_FAN_TICTRL_TBPND;
 449                 flag_timeout = NPCM7XX_FAN_TICTRL_TFPND;
 450                 flag_int = NPCM7XX_FAN_TIEN_TBIEN | NPCM7XX_FAN_TIEN_TFIEN;
 451                 flag_mode = NPCM7XX_FAN_TCKC_CLK2_APB;
 452                 flag_clear = NPCM7XX_FAN_TICLR_TBCLR | NPCM7XX_FAN_TICLR_TFCLR;
 453         }
 454
 455         if (flag & flag_timeout) {
 456                 reg_int =  ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 457
 458                 /* disable interrupt */
 459                 iowrite8((reg_int & ~flag_int),
 460                          NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));
 461
 462                 /* clear interrupt flag */
 463                 iowrite8(flag_clear,
 464                          NPCM7XX_FAN_REG_TICLR(data->fan_base, fan));
 465
 466                 reg_mode =  ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));
 467
 468                 /* stop capturing */
 469                 iowrite8((reg_mode & ~flag_mode),
 470                          NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));
 471
 472                 /*
 473                  *  If timeout occurs (NPCM7XX_FAN_TIMEOUT), the fan doesn't
 474                  *  connect or speed is lower than 10.6Hz (320RPM/pulse2).
 475                  *  In these situation, the RPM output should be zero.
 476                  */
 477                 data->fan_dev[fan_id].fan_cnt = 0;
 478         } else {
 479             /* input capture is occurred */
 480                 if (flag & flag_cap)
 481                         npcm7xx_fan_compute(data, fan, cmp, fan_id, flag_int,
 482                                             flag_mode, flag_clear);
 483         }
 484 }
 485
 486 static irqreturn_t npcm7xx_fan_isr(int irq, void *dev_id)
 487 {
 488         struct npcm7xx_pwm_fan_data *data = dev_id;
 489         unsigned long flags;
 490         int module;
 491         u8 flag;
 492
 493         module = irq - data->fan_irq[0];
 494         spin_lock_irqsave(&data->fan_lock[module], flags);
 495
 496         flag = ioread8(NPCM7XX_FAN_REG_TICTRL(data->fan_base, module));
 497         if (flag > 0) {
 498                 npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPA, flag);
 499                 npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPB, flag);
 500                 spin_unlock_irqrestore(&data->fan_lock[module], flags);
 501                 return IRQ_HANDLED;
 502         }
 503
 504         spin_unlock_irqrestore(&data->fan_lock[module], flags);
 505
 506         return IRQ_NONE;
 507 }
 508
 509 static int npcm7xx_read_pwm(struct device *dev, u32 attr, int channel,
 510                             long *val)
 511 {
 512         struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev);
 513         u32 pmw_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE);
 514         u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE);
 515
 516         switch (attr) {
 517         case hwmon_pwm_input:
 518                 *val = ioread32
 519                         (NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pmw_ch));
 520                 return 0;
 521         default:
 522                 return -EOPNOTSUPP;
 523         }
 524 }
 525
 526 static int npcm7xx_write_pwm(struct device *dev, u32 attr, int channel,
 527                              long val)
 528 {
 529         struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev);
 530         int err;
 531
 532         switch (attr) {
 533         case hwmon_pwm_input:
 534                 if (val < 0 || val > NPCM7XX_PWM_CMR_MAX)
 535                         return -EINVAL;
 536                 err = npcm7xx_pwm_config_set(data, channel, (u16)val);
 537                 break;
 538         default:
 539                 err = -EOPNOTSUPP;
 540                 break;
 541         }
 542
 543         return err;
 544 }
 545
 546 static umode_t npcm7xx_pwm_is_visible(const void *_data, u32 attr, int channel)
 547 {
 548         const struct npcm7xx_pwm_fan_data *data = _data;
 549
 550         if (!data->pwm_present[channel] || channel >= data->info->pwm_max_channel)
 551                 return 0;
 552
 553         switch (attr) {
 554         case hwmon_pwm_input:
 555                 return 0644;
 556         default:
 557                 return 0;
 558         }
 559 }
 560
 561 static int npcm7xx_read_fan(struct device *dev, u32 attr, int channel,
 562                             long *val)
 563 {
 564         struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev);
 565
 566         switch (attr) {
 567         case hwmon_fan_input:
 568                 *val = 0;
 569                 if (data->fan_dev[channel].fan_cnt <= 0)
 570                         return data->fan_dev[channel].fan_cnt;
 571
 572                 /* Convert the raw reading to RPM */
 573                 if (data->fan_dev[channel].fan_cnt > 0 &&
 574                     data->fan_dev[channel].fan_pls_per_rev > 0)
 575                         *val = ((data->input_clk_freq * 60) /
 576                                 (data->fan_dev[channel].fan_cnt *
 577                                  data->fan_dev[channel].fan_pls_per_rev));
 578                 return 0;
 579         default:
 580                 return -EOPNOTSUPP;
 581         }
 582 }
 583
 584 static umode_t npcm7xx_fan_is_visible(const void *_data, u32 attr, int channel)
 585 {
 586         const struct npcm7xx_pwm_fan_data *data = _data;
 587
 588         if (!data->fan_present[channel])
 589                 return 0;
 590
 591         switch (attr) {
 592         case hwmon_fan_input:
 593                 return 0444;
 594         default:
 595                 return 0;
 596         }
 597 }
 598
 599 static int npcm7xx_read(struct device *dev, enum hwmon_sensor_types type,
 600                         u32 attr, int channel, long *val)
 601 {
 602         switch (type) {
 603         case hwmon_pwm:
 604                 return npcm7xx_read_pwm(dev, attr, channel, val);
 605         case hwmon_fan:
 606                 return npcm7xx_read_fan(dev, attr, channel, val);
 607         default:
 608                 return -EOPNOTSUPP;
 609         }
 610 }
 611
 612 static int npcm7xx_write(struct device *dev, enum hwmon_sensor_types type,
 613                          u32 attr, int channel, long val)
 614 {
 615         switch (type) {
 616         case hwmon_pwm:
 617                 return npcm7xx_write_pwm(dev, attr, channel, val);
 618         default:
 619                 return -EOPNOTSUPP;
 620         }
 621 }
 622
 623 static umode_t npcm7xx_is_visible(const void *data,
 624                                   enum hwmon_sensor_types type,
 625                                   u32 attr, int channel)
 626 {
 627         switch (type) {
 628         case hwmon_pwm:
 629                 return npcm7xx_pwm_is_visible(data, attr, channel);
 630         case hwmon_fan:
 631                 return npcm7xx_fan_is_visible(data, attr, channel);
 632         default:
 633                 return 0;
 634         }
 635 }
 636
 637 static const struct hwmon_channel_info * const npcm7xx_info[] = {
 638         HWMON_CHANNEL_INFO(pwm,
 639                            HWMON_PWM_INPUT,
 640                            HWMON_PWM_INPUT,
 641                            HWMON_PWM_INPUT,
 642                            HWMON_PWM_INPUT,
 643                            HWMON_PWM_INPUT,
 644                            HWMON_PWM_INPUT,
 645                            HWMON_PWM_INPUT,
 646                            HWMON_PWM_INPUT,
 647                            HWMON_PWM_INPUT,
 648                            HWMON_PWM_INPUT,
 649                            HWMON_PWM_INPUT,
 650                            HWMON_PWM_INPUT),
 651         HWMON_CHANNEL_INFO(fan,
 652                            HWMON_F_INPUT,
 653                            HWMON_F_INPUT,
 654                            HWMON_F_INPUT,
 655                            HWMON_F_INPUT,
 656                            HWMON_F_INPUT,
 657                            HWMON_F_INPUT,
 658                            HWMON_F_INPUT,
 659                            HWMON_F_INPUT,
 660                            HWMON_F_INPUT,
 661                            HWMON_F_INPUT,
 662                            HWMON_F_INPUT,
 663                            HWMON_F_INPUT,
 664                            HWMON_F_INPUT,
 665                            HWMON_F_INPUT,
 666                            HWMON_F_INPUT,
 667                            HWMON_F_INPUT),
 668         NULL
 669 };
 670
 671 static const struct hwmon_ops npcm7xx_hwmon_ops = {
 672         .is_visible = npcm7xx_is_visible,
 673         .read = npcm7xx_read,
 674         .write = npcm7xx_write,
 675 };
 676
 677 static const struct hwmon_chip_info npcm7xx_chip_info = {
 678         .ops = &npcm7xx_hwmon_ops,
 679         .info = npcm7xx_info,
 680 };
 681
 682 static const struct npcm_hwmon_info npxm7xx_hwmon_info = {
 683         .pwm_max_channel = 8,
 684 };
 685
 686 static const struct npcm_hwmon_info npxm8xx_hwmon_info = {
 687         .pwm_max_channel = 12,
 688 };
 689
 690 static u32 npcm7xx_pwm_init(struct npcm7xx_pwm_fan_data *data)
 691 {
 692         int m, ch;
 693         u32 prescale_val, output_freq;
 694
 695         data->pwm_clk_freq = clk_get_rate(data->pwm_clk);
 696
 697         /* Adjust NPCM7xx PWMs output frequency to ~25Khz */
 698         output_freq = data->pwm_clk_freq / PWN_CNT_DEFAULT;
 699         prescale_val = DIV_ROUND_CLOSEST(output_freq, PWM_OUTPUT_FREQ_25KHZ);
 700
 701         /* If prescale_val = 0, then the prescale output clock is stopped */
 702         if (prescale_val < MIN_PRESCALE1)
 703                 prescale_val = MIN_PRESCALE1;
 704         /*
 705          * prescale_val need to decrement in one because in the PWM Prescale
 706          * register the Prescale value increment by one
 707          */
 708         prescale_val--;
 709
 710         /* Setting PWM Prescale Register value register to both modules */
 711         prescale_val |= (prescale_val << NPCM7XX_PWM_PRESCALE_SHIFT_CH01);
 712
 713         for (m = 0; m < NPCM7XX_PWM_MAX_MODULES  ; m++) {
 714                 iowrite32(prescale_val, NPCM7XX_PWM_REG_PR(data->pwm_base, m));
 715                 iowrite32(NPCM7XX_PWM_PRESCALE2_DEFAULT,
 716                           NPCM7XX_PWM_REG_CSR(data->pwm_base, m));
 717                 iowrite32(NPCM7XX_PWM_CTRL_MODE_DEFAULT,
 718                           NPCM7XX_PWM_REG_CR(data->pwm_base, m));
 719
 720                 for (ch = 0; ch < NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE; ch++) {
 721                         iowrite32(NPCM7XX_PWM_COUNTER_DEFAULT_NUM,
 722                                   NPCM7XX_PWM_REG_CNRx(data->pwm_base, m, ch));
 723                 }
 724         }
 725
 726         return output_freq / ((prescale_val & 0xf) + 1);
 727 }
 728
 729 static void npcm7xx_fan_init(struct npcm7xx_pwm_fan_data *data)
 730 {
 731         int md;
 732         int ch;
 733         int i;
 734         u32 apb_clk_freq;
 735
 736         for (md = 0; md < NPCM7XX_FAN_MAX_MODULE; md++) {
 737                 /* stop FAN0~7 clock */
 738                 iowrite8(NPCM7XX_FAN_TCKC_CLKX_NONE,
 739                          NPCM7XX_FAN_REG_TCKC(data->fan_base, md));
 740
 741                 /* disable all interrupt */
 742                 iowrite8(0x00, NPCM7XX_FAN_REG_TIEN(data->fan_base, md));
 743
 744                 /* clear all interrupt */
 745                 iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL,
 746                          NPCM7XX_FAN_REG_TICLR(data->fan_base, md));
 747
 748                 /* set FAN0~7 clock prescaler */
 749                 iowrite8(NPCM7XX_FAN_CLK_PRESCALE,
 750                          NPCM7XX_FAN_REG_TPRSC(data->fan_base, md));
 751
 752                 /* set FAN0~7 mode (high-to-low transition) */
 753                 iowrite8((NPCM7XX_FAN_TMCTRL_MODE_5 | NPCM7XX_FAN_TMCTRL_TBEN |
 754                           NPCM7XX_FAN_TMCTRL_TAEN),
 755                          NPCM7XX_FAN_REG_TMCTRL(data->fan_base, md));
 756
 757                 /* set FAN0~7 Initial Count/Cap */
 758                 iowrite16(NPCM7XX_FAN_TCNT,
 759                           NPCM7XX_FAN_REG_TCNT1(data->fan_base, md));
 760                 iowrite16(NPCM7XX_FAN_TCNT,
 761                           NPCM7XX_FAN_REG_TCNT2(data->fan_base, md));
 762
 763                 /* set FAN0~7 compare (equal to count) */
 764                 iowrite8((NPCM7XX_FAN_TCPCFG_EQAEN | NPCM7XX_FAN_TCPCFG_EQBEN),
 765                          NPCM7XX_FAN_REG_TCPCFG(data->fan_base, md));
 766
 767                 /* set FAN0~7 compare value */
 768                 iowrite16(NPCM7XX_FAN_TCPA,
 769                           NPCM7XX_FAN_REG_TCPA(data->fan_base, md));
 770                 iowrite16(NPCM7XX_FAN_TCPB,
 771                           NPCM7XX_FAN_REG_TCPB(data->fan_base, md));
 772
 773                 /* set FAN0~7 fan input FANIN 0~15 */
 774                 iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT,
 775                          NPCM7XX_FAN_REG_TINASEL(data->fan_base, md));
 776                 iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT,
 777                          NPCM7XX_FAN_REG_TINBSEL(data->fan_base, md));
 778
 779                 for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE; i++) {
 780                         ch = md * NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE + i;
 781                         data->fan_dev[ch].fan_st_flg = FAN_DISABLE;
 782                         data->fan_dev[ch].fan_pls_per_rev =
 783                                 NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION;
 784                         data->fan_dev[ch].fan_cnt = 0;
 785                 }
 786         }
 787
 788         apb_clk_freq = clk_get_rate(data->fan_clk);
 789
 790         /* Fan tach input clock = APB clock / prescalar, default is 255. */
 791         data->input_clk_freq = apb_clk_freq / (NPCM7XX_FAN_CLK_PRESCALE + 1);
 792 }
 793
 794 static int
 795 npcm7xx_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev,
 796                              unsigned long *state)
 797 {
 798         struct npcm7xx_cooling_device *cdev = tcdev->devdata;
 799
 800         *state = cdev->max_state;
 801
 802         return 0;
 803 }
 804
 805 static int
 806 npcm7xx_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev,
 807                              unsigned long *state)
 808 {
 809         struct npcm7xx_cooling_device *cdev = tcdev->devdata;
 810
 811         *state = cdev->cur_state;
 812
 813         return 0;
 814 }
 815
 816 static int
 817 npcm7xx_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev,
 818                              unsigned long state)
 819 {
 820         struct npcm7xx_cooling_device *cdev = tcdev->devdata;
 821         int ret;
 822
 823         if (state > cdev->max_state)
 824                 return -EINVAL;
 825
 826         cdev->cur_state = state;
 827         ret = npcm7xx_pwm_config_set(cdev->data, cdev->pwm_port,
 828                                      cdev->cooling_levels[cdev->cur_state]);
 829
 830         return ret;
 831 }
 832
 833 static const struct thermal_cooling_device_ops npcm7xx_pwm_cool_ops = {
 834         .get_max_state = npcm7xx_pwm_cz_get_max_state,
 835         .get_cur_state = npcm7xx_pwm_cz_get_cur_state,
 836         .set_cur_state = npcm7xx_pwm_cz_set_cur_state,
 837 };
 838
 839 static int npcm7xx_create_pwm_cooling(struct device *dev,
 840                                       struct device_node *child,
 841                                       struct npcm7xx_pwm_fan_data *data,
 842                                       u32 pwm_port, u8 num_levels)
 843 {
 844         int ret;
 845         struct npcm7xx_cooling_device *cdev;
 846
 847         cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL);
 848         if (!cdev)
 849                 return -ENOMEM;
 850
 851         cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL);
 852         if (!cdev->cooling_levels)
 853                 return -ENOMEM;
 854
 855         cdev->max_state = num_levels - 1;
 856         ret = of_property_read_u8_array(child, "cooling-levels",
 857                                         cdev->cooling_levels,
 858                                         num_levels);
 859         if (ret) {
 860                 dev_err(dev, "Property 'cooling-levels' cannot be read.\n");
 861                 return ret;
 862         }
 863         snprintf(cdev->name, THERMAL_NAME_LENGTH, "%pOFn%d", child,
 864                  pwm_port);
 865
 866         cdev->tcdev = devm_thermal_of_cooling_device_register(dev, child,
 867                                 cdev->name, cdev, &npcm7xx_pwm_cool_ops);
 868         if (IS_ERR(cdev->tcdev))
 869                 return PTR_ERR(cdev->tcdev);
 870
 871         cdev->data = data;
 872         cdev->pwm_port = pwm_port;
 873
 874         data->cdev[pwm_port] = cdev;
 875
 876         return 0;
 877 }
 878
 879 static int npcm7xx_en_pwm_fan(struct device *dev,
 880                               struct device_node *child,
 881                               struct npcm7xx_pwm_fan_data *data)
 882 {
 883         u8 *fan_ch;
 884         u32 pwm_port;
 885         int ret, fan_cnt;
 886         u8 index, ch;
 887
 888         ret = of_property_read_u32(child, "reg", &pwm_port);
 889         if (ret)
 890                 return ret;
 891
 892         data->pwm_present[pwm_port] = true;
 893         ret = npcm7xx_pwm_config_set(data, pwm_port,
 894                                      NPCM7XX_PWM_CMR_DEFAULT_NUM);
 895         if (ret)
 896                 return ret;
 897
 898         ret = of_property_count_u8_elems(child, "cooling-levels");
 899         if (ret > 0) {
 900                 ret = npcm7xx_create_pwm_cooling(dev, child, data, pwm_port,
 901                                                  ret);
 902                 if (ret)
 903                         return ret;
 904         }
 905
 906         fan_cnt = of_property_count_u8_elems(child, "fan-tach-ch");
 907         if (fan_cnt < 1)
 908                 return -EINVAL;
 909
 910         fan_ch = devm_kcalloc(dev, fan_cnt, sizeof(*fan_ch), GFP_KERNEL);
 911         if (!fan_ch)
 912                 return -ENOMEM;
 913
 914         ret = of_property_read_u8_array(child, "fan-tach-ch", fan_ch, fan_cnt);
 915         if (ret)
 916                 return ret;
 917
 918         for (ch = 0; ch < fan_cnt; ch++) {
 919                 index = fan_ch[ch];
 920                 data->fan_present[index] = true;
 921                 data->fan_dev[index].fan_st_flg = FAN_INIT;
 922         }
 923
 924         return 0;
 925 }
 926
 927 static int npcm7xx_pwm_fan_probe(struct platform_device *pdev)
 928 {
 929         struct device *dev = &pdev->dev;
 930         struct device_node *np, *child;
 931         struct npcm7xx_pwm_fan_data *data;
 932         struct resource *res;
 933         struct device *hwmon;
 934         char name[20];
 935         int ret, cnt;
 936         u32 output_freq;
 937         u32 i;
 938
 939         np = dev->of_node;
 940
 941         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 942         if (!data)
 943                 return -ENOMEM;
 944
 945         data->info = device_get_match_data(dev);
 946         if (!data->info)
 947                 return -EINVAL;
 948
 949         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm");
 950         if (!res) {
 951                 dev_err(dev, "pwm resource not found\n");
 952                 return -ENODEV;
 953         }
 954
 955         data->pwm_base = devm_ioremap_resource(dev, res);
 956         dev_dbg(dev, "pwm base resource is %pR\n", res);
 957         if (IS_ERR(data->pwm_base))
 958                 return PTR_ERR(data->pwm_base);
 959
 960         data->pwm_clk = devm_clk_get(dev, "pwm");
 961         if (IS_ERR(data->pwm_clk)) {
 962                 dev_err(dev, "couldn't get pwm clock\n");
 963                 return PTR_ERR(data->pwm_clk);
 964         }
 965
 966         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fan");
 967         if (!res) {
 968                 dev_err(dev, "fan resource not found\n");
 969                 return -ENODEV;
 970         }
 971
 972         data->fan_base = devm_ioremap_resource(dev, res);
 973         dev_dbg(dev, "fan base resource is %pR\n", res);
 974         if (IS_ERR(data->fan_base))
 975                 return PTR_ERR(data->fan_base);
 976
 977         data->fan_clk = devm_clk_get(dev, "fan");
 978         if (IS_ERR(data->fan_clk)) {
 979                 dev_err(dev, "couldn't get fan clock\n");
 980                 return PTR_ERR(data->fan_clk);
 981         }
 982
 983         output_freq = npcm7xx_pwm_init(data);
 984         npcm7xx_fan_init(data);
 985
 986         for (cnt = 0; cnt < NPCM7XX_PWM_MAX_MODULES  ; cnt++)
 987                 mutex_init(&data->pwm_lock[cnt]);
 988
 989         for (i = 0; i < NPCM7XX_FAN_MAX_MODULE; i++) {
 990                 spin_lock_init(&data->fan_lock[i]);
 991
 992                 data->fan_irq[i] = platform_get_irq(pdev, i);
 993                 if (data->fan_irq[i] < 0)
 994                         return data->fan_irq[i];
 995
 996                 sprintf(name, "NPCM7XX-FAN-MD%d", i);
 997                 ret = devm_request_irq(dev, data->fan_irq[i], npcm7xx_fan_isr,
 998                                        0, name, (void *)data);
 999                 if (ret) {
1000                         dev_err(dev, "register IRQ fan%d failed\n", i);
1001                         return ret;
1002                 }
1003         }
1004
1005         for_each_child_of_node(np, child) {
1006                 ret = npcm7xx_en_pwm_fan(dev, child, data);
1007                 if (ret) {
1008                         dev_err(dev, "enable pwm and fan failed\n");
1009                         of_node_put(child);
1010                         return ret;
1011                 }
1012         }
1013
1014         hwmon = devm_hwmon_device_register_with_info(dev, "npcm7xx_pwm_fan",
1015                                                      data, &npcm7xx_chip_info,
1016                                                      NULL);
1017         if (IS_ERR(hwmon)) {
1018                 dev_err(dev, "unable to register hwmon device\n");
1019                 return PTR_ERR(hwmon);
1020         }
1021
1022         for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM; i++) {
1023                 if (data->fan_present[i]) {
1024                         /* fan timer initialization */
1025                         data->fan_timer.expires = jiffies +
1026                                 msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS);
1027                         timer_setup(&data->fan_timer,
1028                                     npcm7xx_fan_polling, 0);
1029                         add_timer(&data->fan_timer);
1030                         break;
1031                 }
1032         }
1033
1034         pr_info("NPCM7XX PWM-FAN Driver probed, output Freq %dHz[PWM], input Freq %dHz[FAN]\n",
1035                 output_freq, data->input_clk_freq);
1036
1037         return 0;
1038 }
1039
1040 static const struct of_device_id of_pwm_fan_match_table[] = {
1041         { .compatible = "nuvoton,npcm750-pwm-fan", .data = &npxm7xx_hwmon_info},
1042         { .compatible = "nuvoton,npcm845-pwm-fan", .data = &npxm8xx_hwmon_info},
1043         {},
1044 };
1045 MODULE_DEVICE_TABLE(of, of_pwm_fan_match_table);
1046
1047 static struct platform_driver npcm7xx_pwm_fan_driver = {
1048         .probe          = npcm7xx_pwm_fan_probe,
1049         .driver         = {
1050                 .name   = "npcm7xx_pwm_fan",
1051                 .of_match_table = of_pwm_fan_match_table,
1052         },
1053 };
1054
1055 module_platform_driver(npcm7xx_pwm_fan_driver);
1056
1057 MODULE_DESCRIPTION("Nuvoton NPCM7XX PWM and Fan Tacho driver");
1058 MODULE_AUTHOR("Tomer Maimon <[email protected]>");
1059 MODULE_LICENSE("GPL v2");