arch/blackfin/kernel/bfin_gpio.c

   1 /*
   2  * GPIO Abstraction Layer
   3  *
   4  * Copyright 2006-2010 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later
   7  */
   8
   9 #include <linux/delay.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/proc_fs.h>
  13 #include <asm/blackfin.h>
  14 #include <asm/gpio.h>
  15 #include <asm/portmux.h>
  16 #include <linux/irq.h>
  17
  18 #if ANOMALY_05000311 || ANOMALY_05000323
  19 enum {
  20         AWA_data = SYSCR,
  21         AWA_data_clear = SYSCR,
  22         AWA_data_set = SYSCR,
  23         AWA_toggle = SYSCR,
  24         AWA_maska = BFIN_UART_SCR,
  25         AWA_maska_clear = BFIN_UART_SCR,
  26         AWA_maska_set = BFIN_UART_SCR,
  27         AWA_maska_toggle = BFIN_UART_SCR,
  28         AWA_maskb = BFIN_UART_GCTL,
  29         AWA_maskb_clear = BFIN_UART_GCTL,
  30         AWA_maskb_set = BFIN_UART_GCTL,
  31         AWA_maskb_toggle = BFIN_UART_GCTL,
  32         AWA_dir = SPORT1_STAT,
  33         AWA_polar = SPORT1_STAT,
  34         AWA_edge = SPORT1_STAT,
  35         AWA_both = SPORT1_STAT,
  36 #if ANOMALY_05000311
  37         AWA_inen = TIMER_ENABLE,
  38 #elif ANOMALY_05000323
  39         AWA_inen = DMA1_1_CONFIG,
  40 #endif
  41 };
  42         /* Anomaly Workaround */
  43 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
  44 #else
  45 #define AWA_DUMMY_READ(...)  do { } while (0)
  46 #endif
  47
  48 static struct gpio_port_t * const gpio_array[] = {
  49 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
  50         (struct gpio_port_t *) FIO_FLAG_D,
  51 #elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
  52         (struct gpio_port_t *) PORTFIO,
  53         (struct gpio_port_t *) PORTGIO,
  54         (struct gpio_port_t *) PORTHIO,
  55 #elif defined(BF561_FAMILY)
  56         (struct gpio_port_t *) FIO0_FLAG_D,
  57         (struct gpio_port_t *) FIO1_FLAG_D,
  58         (struct gpio_port_t *) FIO2_FLAG_D,
  59 #elif defined(CONFIG_BF54x)
  60         (struct gpio_port_t *)PORTA_FER,
  61         (struct gpio_port_t *)PORTB_FER,
  62         (struct gpio_port_t *)PORTC_FER,
  63         (struct gpio_port_t *)PORTD_FER,
  64         (struct gpio_port_t *)PORTE_FER,
  65         (struct gpio_port_t *)PORTF_FER,
  66         (struct gpio_port_t *)PORTG_FER,
  67         (struct gpio_port_t *)PORTH_FER,
  68         (struct gpio_port_t *)PORTI_FER,
  69         (struct gpio_port_t *)PORTJ_FER,
  70 #else
  71 # error no gpio arrays defined
  72 #endif
  73 };
  74
  75 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
  76 static unsigned short * const port_fer[] = {
  77         (unsigned short *) PORTF_FER,
  78         (unsigned short *) PORTG_FER,
  79         (unsigned short *) PORTH_FER,
  80 };
  81
  82 # if !defined(BF537_FAMILY)
  83 static unsigned short * const port_mux[] = {
  84         (unsigned short *) PORTF_MUX,
  85         (unsigned short *) PORTG_MUX,
  86         (unsigned short *) PORTH_MUX,
  87 };
  88
  89 static const
  90 u8 pmux_offset[][16] = {
  91 #  if defined(CONFIG_BF52x)
  92         { 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
  93         { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
  94         { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
  95 #  elif defined(CONFIG_BF51x)
  96         { 0, 2, 2, 2, 2, 2, 2, 4, 6, 6, 6, 8, 8, 8, 8, 10 }, /* PORTF */
  97         { 0, 0, 0, 2, 4, 6, 6, 6, 8, 10, 10, 12, 14, 14, 14, 14 }, /* PORTG */
  98         { 0, 0, 0, 0, 2, 2, 4, 6, 10, 10, 10, 10, 10, 10, 10, 10 }, /* PORTH */
  99 #  endif
 100 };
 101 # endif
 102
 103 #elif defined(BF538_FAMILY)
 104 static unsigned short * const port_fer[] = {
 105         (unsigned short *) PORTCIO_FER,
 106         (unsigned short *) PORTDIO_FER,
 107         (unsigned short *) PORTEIO_FER,
 108 };
 109 #endif
 110
 111 #define RESOURCE_LABEL_SIZE     16
 112
 113 static struct str_ident {
 114         char name[RESOURCE_LABEL_SIZE];
 115 } str_ident[MAX_RESOURCES];
 116
 117 #if defined(CONFIG_PM)
 118 static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
 119 #endif
 120
 121 static void gpio_error(unsigned gpio)
 122 {
 123         printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
 124 }
 125
 126 static void set_label(unsigned short ident, const char *label)
 127 {
 128         if (label) {
 129                 strncpy(str_ident[ident].name, label,
 130                          RESOURCE_LABEL_SIZE);
 131                 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
 132         }
 133 }
 134
 135 static char *get_label(unsigned short ident)
 136 {
 137         return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
 138 }
 139
 140 static int cmp_label(unsigned short ident, const char *label)
 141 {
 142         if (label == NULL) {
 143                 dump_stack();
 144                 printk(KERN_ERR "Please provide none-null label\n");
 145         }
 146
 147         if (label)
 148                 return strcmp(str_ident[ident].name, label);
 149         else
 150                 return -EINVAL;
 151 }
 152
 153 #define map_entry(m, i)      reserved_##m##_map[gpio_bank(i)]
 154 #define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i))
 155 #define reserve(m, i)        (map_entry(m, i) |= gpio_bit(i))
 156 #define unreserve(m, i)      (map_entry(m, i) &= ~gpio_bit(i))
 157 #define DECLARE_RESERVED_MAP(m, c) static unsigned short reserved_##m##_map[c]
 158
 159 DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
 160 DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE));
 161 DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM);
 162
 163 inline int check_gpio(unsigned gpio)
 164 {
 165 #if defined(CONFIG_BF54x)
 166         if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
 167             || gpio == GPIO_PH14 || gpio == GPIO_PH15
 168             || gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
 169                 return -EINVAL;
 170 #endif
 171         if (gpio >= MAX_BLACKFIN_GPIOS)
 172                 return -EINVAL;
 173         return 0;
 174 }
 175
 176 static void port_setup(unsigned gpio, unsigned short usage)
 177 {
 178 #if defined(BF538_FAMILY)
 179         /*
 180          * BF538/9 Port C,D and E are special.
 181          * Inverted PORT_FER polarity on CDE and no PORF_FER on F
 182          * Regular PORT F GPIOs are handled here, CDE are exclusively
 183          * managed by GPIOLIB
 184          */
 185
 186         if (gpio < MAX_BLACKFIN_GPIOS || gpio >= MAX_RESOURCES)
 187                 return;
 188
 189         gpio -= MAX_BLACKFIN_GPIOS;
 190
 191         if (usage == GPIO_USAGE)
 192                 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 193         else
 194                 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 195         SSYNC();
 196         return;
 197 #endif
 198
 199         if (check_gpio(gpio))
 200                 return;
 201
 202 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 203         if (usage == GPIO_USAGE)
 204                 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
 205         else
 206                 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
 207         SSYNC();
 208 #elif defined(CONFIG_BF54x)
 209         if (usage == GPIO_USAGE)
 210                 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
 211         else
 212                 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
 213         SSYNC();
 214 #endif
 215 }
 216
 217 #ifdef BF537_FAMILY
 218 static const s8 port_mux[] = {
 219         [GPIO_PF0] = 3,
 220         [GPIO_PF1] = 3,
 221         [GPIO_PF2] = 4,
 222         [GPIO_PF3] = 4,
 223         [GPIO_PF4] = 5,
 224         [GPIO_PF5] = 6,
 225         [GPIO_PF6] = 7,
 226         [GPIO_PF7] = 8,
 227         [GPIO_PF8 ... GPIO_PF15] = -1,
 228         [GPIO_PG0 ... GPIO_PG7] = -1,
 229         [GPIO_PG8] = 9,
 230         [GPIO_PG9] = 9,
 231         [GPIO_PG10] = 10,
 232         [GPIO_PG11] = 10,
 233         [GPIO_PG12] = 10,
 234         [GPIO_PG13] = 11,
 235         [GPIO_PG14] = 11,
 236         [GPIO_PG15] = 11,
 237         [GPIO_PH0 ... GPIO_PH15] = -1,
 238         [PORT_PJ0 ... PORT_PJ3] = -1,
 239         [PORT_PJ4] = 1,
 240         [PORT_PJ5] = 1,
 241         [PORT_PJ6 ... PORT_PJ9] = -1,
 242         [PORT_PJ10] = 0,
 243         [PORT_PJ11] = 0,
 244 };
 245
 246 static int portmux_group_check(unsigned short per)
 247 {
 248         u16 ident = P_IDENT(per);
 249         u16 function = P_FUNCT2MUX(per);
 250         s8 offset = port_mux[ident];
 251         u16 m, pmux, pfunc;
 252
 253         if (offset < 0)
 254                 return 0;
 255
 256         pmux = bfin_read_PORT_MUX();
 257         for (m = 0; m < ARRAY_SIZE(port_mux); ++m) {
 258                 if (m == ident)
 259                         continue;
 260                 if (port_mux[m] != offset)
 261                         continue;
 262                 if (!is_reserved(peri, m, 1))
 263                         continue;
 264
 265                 if (offset == 1)
 266                         pfunc = (pmux >> offset) & 3;
 267                 else
 268                         pfunc = (pmux >> offset) & 1;
 269                 if (pfunc != function) {
 270                         pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
 271                                 ident, function, m, pfunc);
 272                         return -EINVAL;
 273                 }
 274         }
 275
 276         return 0;
 277 }
 278
 279 static void portmux_setup(unsigned short per)
 280 {
 281         u16 ident = P_IDENT(per);
 282         u16 function = P_FUNCT2MUX(per);
 283         s8 offset = port_mux[ident];
 284         u16 pmux;
 285
 286         if (offset == -1)
 287                 return;
 288
 289         pmux = bfin_read_PORT_MUX();
 290         if (offset != 1)
 291                 pmux &= ~(1 << offset);
 292         else
 293                 pmux &= ~(3 << 1);
 294         pmux |= (function << offset);
 295         bfin_write_PORT_MUX(pmux);
 296 }
 297 #elif defined(CONFIG_BF54x)
 298 inline void portmux_setup(unsigned short per)
 299 {
 300         u16 ident = P_IDENT(per);
 301         u16 function = P_FUNCT2MUX(per);
 302         u32 pmux;
 303
 304         pmux = gpio_array[gpio_bank(ident)]->port_mux;
 305
 306         pmux &= ~(0x3 << (2 * gpio_sub_n(ident)));
 307         pmux |= (function & 0x3) << (2 * gpio_sub_n(ident));
 308
 309         gpio_array[gpio_bank(ident)]->port_mux = pmux;
 310 }
 311
 312 inline u16 get_portmux(unsigned short per)
 313 {
 314         u16 ident = P_IDENT(per);
 315         u32 pmux = gpio_array[gpio_bank(ident)]->port_mux;
 316         return (pmux >> (2 * gpio_sub_n(ident)) & 0x3);
 317 }
 318 static int portmux_group_check(unsigned short per)
 319 {
 320         return 0;
 321 }
 322 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 323 static int portmux_group_check(unsigned short per)
 324 {
 325         u16 ident = P_IDENT(per);
 326         u16 function = P_FUNCT2MUX(per);
 327         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 328         u16 pin, gpiopin, pfunc;
 329
 330         for (pin = 0; pin < GPIO_BANKSIZE; ++pin) {
 331                 if (offset != pmux_offset[gpio_bank(ident)][pin])
 332                         continue;
 333
 334                 gpiopin = gpio_bank(ident) * GPIO_BANKSIZE + pin;
 335                 if (gpiopin == ident)
 336                         continue;
 337                 if (!is_reserved(peri, gpiopin, 1))
 338                         continue;
 339
 340                 pfunc = *port_mux[gpio_bank(ident)];
 341                 pfunc = (pfunc >> offset) & 3;
 342                 if (pfunc != function) {
 343                         pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
 344                                 ident, function, gpiopin, pfunc);
 345                         return -EINVAL;
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352 inline void portmux_setup(unsigned short per)
 353 {
 354         u16 ident = P_IDENT(per);
 355         u16 function = P_FUNCT2MUX(per);
 356         u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
 357         u16 pmux;
 358
 359         pmux = *port_mux[gpio_bank(ident)];
 360         if  (((pmux >> offset) & 3) == function)
 361                 return;
 362         pmux &= ~(3 << offset);
 363         pmux |= (function & 3) << offset;
 364         *port_mux[gpio_bank(ident)] = pmux;
 365         SSYNC();
 366 }
 367 #else
 368 # define portmux_setup(...)  do { } while (0)
 369 static int portmux_group_check(unsigned short per)
 370 {
 371         return 0;
 372 }
 373 #endif
 374
 375 #ifndef CONFIG_BF54x
 376 /***********************************************************
 377 *
 378 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
 379 *
 380 * INPUTS/OUTPUTS:
 381 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 382 *
 383 *
 384 * DESCRIPTION: These functions abstract direct register access
 385 *              to Blackfin processor General Purpose
 386 *              Ports Regsiters
 387 *
 388 * CAUTION: These functions do not belong to the GPIO Driver API
 389 *************************************************************
 390 * MODIFICATION HISTORY :
 391 **************************************************************/
 392
 393 /* Set a specific bit */
 394
 395 #define SET_GPIO(name) \
 396 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 397 { \
 398         unsigned long flags; \
 399         flags = hard_local_irq_save(); \
 400         if (arg) \
 401                 gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
 402         else \
 403                 gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
 404         AWA_DUMMY_READ(name); \
 405         hard_local_irq_restore(flags); \
 406 } \
 407 EXPORT_SYMBOL(set_gpio_ ## name);
 408
 409 SET_GPIO(dir)   /* set_gpio_dir() */
 410 SET_GPIO(inen)  /* set_gpio_inen() */
 411 SET_GPIO(polar) /* set_gpio_polar() */
 412 SET_GPIO(edge)  /* set_gpio_edge() */
 413 SET_GPIO(both)  /* set_gpio_both() */
 414
 415
 416 #define SET_GPIO_SC(name) \
 417 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
 418 { \
 419         unsigned long flags; \
 420         if (ANOMALY_05000311 || ANOMALY_05000323) \
 421                 flags = hard_local_irq_save(); \
 422         if (arg) \
 423                 gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
 424         else \
 425                 gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
 426         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 427                 AWA_DUMMY_READ(name); \
 428                 hard_local_irq_restore(flags); \
 429         } \
 430 } \
 431 EXPORT_SYMBOL(set_gpio_ ## name);
 432
 433 SET_GPIO_SC(maska)
 434 SET_GPIO_SC(maskb)
 435 SET_GPIO_SC(data)
 436
 437 void set_gpio_toggle(unsigned gpio)
 438 {
 439         unsigned long flags;
 440         if (ANOMALY_05000311 || ANOMALY_05000323)
 441                 flags = hard_local_irq_save();
 442         gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
 443         if (ANOMALY_05000311 || ANOMALY_05000323) {
 444                 AWA_DUMMY_READ(toggle);
 445                 hard_local_irq_restore(flags);
 446         }
 447 }
 448 EXPORT_SYMBOL(set_gpio_toggle);
 449
 450
 451 /*Set current PORT date (16-bit word)*/
 452
 453 #define SET_GPIO_P(name) \
 454 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
 455 { \
 456         unsigned long flags; \
 457         if (ANOMALY_05000311 || ANOMALY_05000323) \
 458                 flags = hard_local_irq_save(); \
 459         gpio_array[gpio_bank(gpio)]->name = arg; \
 460         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 461                 AWA_DUMMY_READ(name); \
 462                 hard_local_irq_restore(flags); \
 463         } \
 464 } \
 465 EXPORT_SYMBOL(set_gpiop_ ## name);
 466
 467 SET_GPIO_P(data)
 468 SET_GPIO_P(dir)
 469 SET_GPIO_P(inen)
 470 SET_GPIO_P(polar)
 471 SET_GPIO_P(edge)
 472 SET_GPIO_P(both)
 473 SET_GPIO_P(maska)
 474 SET_GPIO_P(maskb)
 475
 476 /* Get a specific bit */
 477 #define GET_GPIO(name) \
 478 unsigned short get_gpio_ ## name(unsigned gpio) \
 479 { \
 480         unsigned long flags; \
 481         unsigned short ret; \
 482         if (ANOMALY_05000311 || ANOMALY_05000323) \
 483                 flags = hard_local_irq_save(); \
 484         ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
 485         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 486                 AWA_DUMMY_READ(name); \
 487                 hard_local_irq_restore(flags); \
 488         } \
 489         return ret; \
 490 } \
 491 EXPORT_SYMBOL(get_gpio_ ## name);
 492
 493 GET_GPIO(data)
 494 GET_GPIO(dir)
 495 GET_GPIO(inen)
 496 GET_GPIO(polar)
 497 GET_GPIO(edge)
 498 GET_GPIO(both)
 499 GET_GPIO(maska)
 500 GET_GPIO(maskb)
 501
 502 /*Get current PORT date (16-bit word)*/
 503
 504 #define GET_GPIO_P(name) \
 505 unsigned short get_gpiop_ ## name(unsigned gpio) \
 506 { \
 507         unsigned long flags; \
 508         unsigned short ret; \
 509         if (ANOMALY_05000311 || ANOMALY_05000323) \
 510                 flags = hard_local_irq_save(); \
 511         ret = (gpio_array[gpio_bank(gpio)]->name); \
 512         if (ANOMALY_05000311 || ANOMALY_05000323) { \
 513                 AWA_DUMMY_READ(name); \
 514                 hard_local_irq_restore(flags); \
 515         } \
 516         return ret; \
 517 } \
 518 EXPORT_SYMBOL(get_gpiop_ ## name);
 519
 520 GET_GPIO_P(data)
 521 GET_GPIO_P(dir)
 522 GET_GPIO_P(inen)
 523 GET_GPIO_P(polar)
 524 GET_GPIO_P(edge)
 525 GET_GPIO_P(both)
 526 GET_GPIO_P(maska)
 527 GET_GPIO_P(maskb)
 528
 529
 530 #ifdef CONFIG_PM
 531 DECLARE_RESERVED_MAP(wakeup, GPIO_BANK_NUM);
 532
 533 static const unsigned int sic_iwr_irqs[] = {
 534 #if defined(BF533_FAMILY)
 535         IRQ_PROG_INTB
 536 #elif defined(BF537_FAMILY)
 537         IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX
 538 #elif defined(BF538_FAMILY)
 539         IRQ_PORTF_INTB
 540 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 541         IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB
 542 #elif defined(BF561_FAMILY)
 543         IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB
 544 #else
 545 # error no SIC_IWR defined
 546 #endif
 547 };
 548
 549 /***********************************************************
 550 *
 551 * FUNCTIONS: Blackfin PM Setup API
 552 *
 553 * INPUTS/OUTPUTS:
 554 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
 555 * type -
 556 *       PM_WAKE_RISING
 557 *       PM_WAKE_FALLING
 558 *       PM_WAKE_HIGH
 559 *       PM_WAKE_LOW
 560 *       PM_WAKE_BOTH_EDGES
 561 *
 562 * DESCRIPTION: Blackfin PM Driver API
 563 *
 564 * CAUTION:
 565 *************************************************************
 566 * MODIFICATION HISTORY :
 567 **************************************************************/
 568 int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
 569 {
 570         unsigned long flags;
 571
 572         if (check_gpio(gpio) < 0)
 573                 return -EINVAL;
 574
 575         flags = hard_local_irq_save();
 576         if (ctrl)
 577                 reserve(wakeup, gpio);
 578         else
 579                 unreserve(wakeup, gpio);
 580
 581         set_gpio_maskb(gpio, ctrl);
 582         hard_local_irq_restore(flags);
 583
 584         return 0;
 585 }
 586
 587 int bfin_pm_standby_ctrl(unsigned ctrl)
 588 {
 589         u16 bank, mask, i;
 590
 591         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 592                 mask = map_entry(wakeup, i);
 593                 bank = gpio_bank(i);
 594
 595                 if (mask)
 596                         bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl);
 597         }
 598         return 0;
 599 }
 600
 601 void bfin_gpio_pm_hibernate_suspend(void)
 602 {
 603         int i, bank;
 604
 605         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 606                 bank = gpio_bank(i);
 607
 608 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 609                 gpio_bank_saved[bank].fer = *port_fer[bank];
 610 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 611                 gpio_bank_saved[bank].mux = *port_mux[bank];
 612 #else
 613                 if (bank == 0)
 614                         gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
 615 #endif
 616 #endif
 617                 gpio_bank_saved[bank].data  = gpio_array[bank]->data;
 618                 gpio_bank_saved[bank].inen  = gpio_array[bank]->inen;
 619                 gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
 620                 gpio_bank_saved[bank].dir   = gpio_array[bank]->dir;
 621                 gpio_bank_saved[bank].edge  = gpio_array[bank]->edge;
 622                 gpio_bank_saved[bank].both  = gpio_array[bank]->both;
 623                 gpio_bank_saved[bank].maska = gpio_array[bank]->maska;
 624         }
 625
 626         AWA_DUMMY_READ(maska);
 627 }
 628
 629 void bfin_gpio_pm_hibernate_restore(void)
 630 {
 631         int i, bank;
 632
 633         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 634                 bank = gpio_bank(i);
 635
 636 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
 637 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 638                 *port_mux[bank] = gpio_bank_saved[bank].mux;
 639 #else
 640                 if (bank == 0)
 641                         bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
 642 #endif
 643                 *port_fer[bank] = gpio_bank_saved[bank].fer;
 644 #endif
 645                 gpio_array[bank]->inen  = gpio_bank_saved[bank].inen;
 646                 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
 647                                                 & gpio_bank_saved[bank].dir;
 648                 gpio_array[bank]->dir   = gpio_bank_saved[bank].dir;
 649                 gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
 650                 gpio_array[bank]->edge  = gpio_bank_saved[bank].edge;
 651                 gpio_array[bank]->both  = gpio_bank_saved[bank].both;
 652                 gpio_array[bank]->maska = gpio_bank_saved[bank].maska;
 653         }
 654         AWA_DUMMY_READ(maska);
 655 }
 656
 657
 658 #endif
 659 #else /* CONFIG_BF54x */
 660 #ifdef CONFIG_PM
 661
 662 int bfin_pm_standby_ctrl(unsigned ctrl)
 663 {
 664         return 0;
 665 }
 666
 667 void bfin_gpio_pm_hibernate_suspend(void)
 668 {
 669         int i, bank;
 670
 671         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 672                 bank = gpio_bank(i);
 673
 674                 gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
 675                 gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
 676                 gpio_bank_saved[bank].data = gpio_array[bank]->data;
 677                 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
 678                 gpio_bank_saved[bank].dir = gpio_array[bank]->dir_set;
 679         }
 680 }
 681
 682 void bfin_gpio_pm_hibernate_restore(void)
 683 {
 684         int i, bank;
 685
 686         for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
 687                 bank = gpio_bank(i);
 688
 689                 gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
 690                 gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
 691                 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
 692                 gpio_array[bank]->dir_set = gpio_bank_saved[bank].dir;
 693                 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
 694                                                 | gpio_bank_saved[bank].dir;
 695         }
 696 }
 697 #endif
 698
 699 unsigned short get_gpio_dir(unsigned gpio)
 700 {
 701         return (0x01 & (gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio)));
 702 }
 703 EXPORT_SYMBOL(get_gpio_dir);
 704
 705 #endif /* CONFIG_BF54x */
 706
 707 /***********************************************************
 708 *
 709 * FUNCTIONS:    Blackfin Peripheral Resource Allocation
 710 *               and PortMux Setup
 711 *
 712 * INPUTS/OUTPUTS:
 713 * per   Peripheral Identifier
 714 * label String
 715 *
 716 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
 717 *
 718 * CAUTION:
 719 *************************************************************
 720 * MODIFICATION HISTORY :
 721 **************************************************************/
 722
 723 int peripheral_request(unsigned short per, const char *label)
 724 {
 725         unsigned long flags;
 726         unsigned short ident = P_IDENT(per);
 727
 728         /*
 729          * Don't cares are pins with only one dedicated function
 730          */
 731
 732         if (per & P_DONTCARE)
 733                 return 0;
 734
 735         if (!(per & P_DEFINED))
 736                 return -ENODEV;
 737
 738         BUG_ON(ident >= MAX_RESOURCES);
 739
 740         flags = hard_local_irq_save();
 741
 742         /* If a pin can be muxed as either GPIO or peripheral, make
 743          * sure it is not already a GPIO pin when we request it.
 744          */
 745         if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
 746                 if (system_state == SYSTEM_BOOTING)
 747                         dump_stack();
 748                 printk(KERN_ERR
 749                        "%s: Peripheral %d is already reserved as GPIO by %s !\n",
 750                        __func__, ident, get_label(ident));
 751                 hard_local_irq_restore(flags);
 752                 return -EBUSY;
 753         }
 754
 755         if (unlikely(is_reserved(peri, ident, 1))) {
 756
 757                 /*
 758                  * Pin functions like AMC address strobes my
 759                  * be requested and used by several drivers
 760                  */
 761
 762 #ifdef CONFIG_BF54x
 763                 if (!((per & P_MAYSHARE) && get_portmux(per) == P_FUNCT2MUX(per))) {
 764 #else
 765                 if (!(per & P_MAYSHARE)) {
 766 #endif
 767                         /*
 768                          * Allow that the identical pin function can
 769                          * be requested from the same driver twice
 770                          */
 771
 772                         if (cmp_label(ident, label) == 0)
 773                                 goto anyway;
 774
 775                         if (system_state == SYSTEM_BOOTING)
 776                                 dump_stack();
 777                         printk(KERN_ERR
 778                                "%s: Peripheral %d function %d is already reserved by %s !\n",
 779                                __func__, ident, P_FUNCT2MUX(per), get_label(ident));
 780                         hard_local_irq_restore(flags);
 781                         return -EBUSY;
 782                 }
 783         }
 784
 785         if (unlikely(portmux_group_check(per))) {
 786                 hard_local_irq_restore(flags);
 787                 return -EBUSY;
 788         }
 789  anyway:
 790         reserve(peri, ident);
 791
 792         portmux_setup(per);
 793         port_setup(ident, PERIPHERAL_USAGE);
 794
 795         hard_local_irq_restore(flags);
 796         set_label(ident, label);
 797
 798         return 0;
 799 }
 800 EXPORT_SYMBOL(peripheral_request);
 801
 802 int peripheral_request_list(const unsigned short per[], const char *label)
 803 {
 804         u16 cnt;
 805         int ret;
 806
 807         for (cnt = 0; per[cnt] != 0; cnt++) {
 808
 809                 ret = peripheral_request(per[cnt], label);
 810
 811                 if (ret < 0) {
 812                         for ( ; cnt > 0; cnt--)
 813                                 peripheral_free(per[cnt - 1]);
 814
 815                         return ret;
 816                 }
 817         }
 818
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(peripheral_request_list);
 822
 823 void peripheral_free(unsigned short per)
 824 {
 825         unsigned long flags;
 826         unsigned short ident = P_IDENT(per);
 827
 828         if (per & P_DONTCARE)
 829                 return;
 830
 831         if (!(per & P_DEFINED))
 832                 return;
 833
 834         flags = hard_local_irq_save();
 835
 836         if (unlikely(!is_reserved(peri, ident, 0))) {
 837                 hard_local_irq_restore(flags);
 838                 return;
 839         }
 840
 841         if (!(per & P_MAYSHARE))
 842                 port_setup(ident, GPIO_USAGE);
 843
 844         unreserve(peri, ident);
 845
 846         set_label(ident, "free");
 847
 848         hard_local_irq_restore(flags);
 849 }
 850 EXPORT_SYMBOL(peripheral_free);
 851
 852 void peripheral_free_list(const unsigned short per[])
 853 {
 854         u16 cnt;
 855         for (cnt = 0; per[cnt] != 0; cnt++)
 856                 peripheral_free(per[cnt]);
 857 }
 858 EXPORT_SYMBOL(peripheral_free_list);
 859
 860 /***********************************************************
 861 *
 862 * FUNCTIONS: Blackfin GPIO Driver
 863 *
 864 * INPUTS/OUTPUTS:
 865 * gpio  PIO Number between 0 and MAX_BLACKFIN_GPIOS
 866 * label String
 867 *
 868 * DESCRIPTION: Blackfin GPIO Driver API
 869 *
 870 * CAUTION:
 871 *************************************************************
 872 * MODIFICATION HISTORY :
 873 **************************************************************/
 874
 875 int bfin_gpio_request(unsigned gpio, const char *label)
 876 {
 877         unsigned long flags;
 878
 879         if (check_gpio(gpio) < 0)
 880                 return -EINVAL;
 881
 882         flags = hard_local_irq_save();
 883
 884         /*
 885          * Allow that the identical GPIO can
 886          * be requested from the same driver twice
 887          * Do nothing and return -
 888          */
 889
 890         if (cmp_label(gpio, label) == 0) {
 891                 hard_local_irq_restore(flags);
 892                 return 0;
 893         }
 894
 895         if (unlikely(is_reserved(gpio, gpio, 1))) {
 896                 if (system_state == SYSTEM_BOOTING)
 897                         dump_stack();
 898                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
 899                        gpio, get_label(gpio));
 900                 hard_local_irq_restore(flags);
 901                 return -EBUSY;
 902         }
 903         if (unlikely(is_reserved(peri, gpio, 1))) {
 904                 if (system_state == SYSTEM_BOOTING)
 905                         dump_stack();
 906                 printk(KERN_ERR
 907                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
 908                        gpio, get_label(gpio));
 909                 hard_local_irq_restore(flags);
 910                 return -EBUSY;
 911         }
 912         if (unlikely(is_reserved(gpio_irq, gpio, 1))) {
 913                 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!"
 914                        " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio);
 915         }
 916 #ifndef CONFIG_BF54x
 917         else {  /* Reset POLAR setting when acquiring a gpio for the first time */
 918                 set_gpio_polar(gpio, 0);
 919         }
 920 #endif
 921
 922         reserve(gpio, gpio);
 923         set_label(gpio, label);
 924
 925         hard_local_irq_restore(flags);
 926
 927         port_setup(gpio, GPIO_USAGE);
 928
 929         return 0;
 930 }
 931 EXPORT_SYMBOL(bfin_gpio_request);
 932
 933 void bfin_gpio_free(unsigned gpio)
 934 {
 935         unsigned long flags;
 936
 937         if (check_gpio(gpio) < 0)
 938                 return;
 939
 940         might_sleep();
 941
 942         flags = hard_local_irq_save();
 943
 944         if (unlikely(!is_reserved(gpio, gpio, 0))) {
 945                 if (system_state == SYSTEM_BOOTING)
 946                         dump_stack();
 947                 gpio_error(gpio);
 948                 hard_local_irq_restore(flags);
 949                 return;
 950         }
 951
 952         unreserve(gpio, gpio);
 953
 954         set_label(gpio, "free");
 955
 956         hard_local_irq_restore(flags);
 957 }
 958 EXPORT_SYMBOL(bfin_gpio_free);
 959
 960 #ifdef BFIN_SPECIAL_GPIO_BANKS
 961 DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES));
 962
 963 int bfin_special_gpio_request(unsigned gpio, const char *label)
 964 {
 965         unsigned long flags;
 966
 967         flags = hard_local_irq_save();
 968
 969         /*
 970          * Allow that the identical GPIO can
 971          * be requested from the same driver twice
 972          * Do nothing and return -
 973          */
 974
 975         if (cmp_label(gpio, label) == 0) {
 976                 hard_local_irq_restore(flags);
 977                 return 0;
 978         }
 979
 980         if (unlikely(is_reserved(special_gpio, gpio, 1))) {
 981                 hard_local_irq_restore(flags);
 982                 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
 983                        gpio, get_label(gpio));
 984
 985                 return -EBUSY;
 986         }
 987         if (unlikely(is_reserved(peri, gpio, 1))) {
 988                 hard_local_irq_restore(flags);
 989                 printk(KERN_ERR
 990                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
 991                        gpio, get_label(gpio));
 992
 993                 return -EBUSY;
 994         }
 995
 996         reserve(special_gpio, gpio);
 997         reserve(peri, gpio);
 998
 999         set_label(gpio, label);
1000         hard_local_irq_restore(flags);
1001         port_setup(gpio, GPIO_USAGE);
1002
1003         return 0;
1004 }
1005 EXPORT_SYMBOL(bfin_special_gpio_request);
1006
1007 void bfin_special_gpio_free(unsigned gpio)
1008 {
1009         unsigned long flags;
1010
1011         might_sleep();
1012
1013         flags = hard_local_irq_save();
1014
1015         if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
1016                 gpio_error(gpio);
1017                 hard_local_irq_restore(flags);
1018                 return;
1019         }
1020
1021         unreserve(special_gpio, gpio);
1022         unreserve(peri, gpio);
1023         set_label(gpio, "free");
1024         hard_local_irq_restore(flags);
1025 }
1026 EXPORT_SYMBOL(bfin_special_gpio_free);
1027 #endif
1028
1029
1030 int bfin_gpio_irq_request(unsigned gpio, const char *label)
1031 {
1032         unsigned long flags;
1033
1034         if (check_gpio(gpio) < 0)
1035                 return -EINVAL;
1036
1037         flags = hard_local_irq_save();
1038
1039         if (unlikely(is_reserved(peri, gpio, 1))) {
1040                 if (system_state == SYSTEM_BOOTING)
1041                         dump_stack();
1042                 printk(KERN_ERR
1043                        "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1044                        gpio, get_label(gpio));
1045                 hard_local_irq_restore(flags);
1046                 return -EBUSY;
1047         }
1048         if (unlikely(is_reserved(gpio, gpio, 1)))
1049                 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! "
1050                        "(Documentation/blackfin/bfin-gpio-notes.txt)\n",
1051                        gpio, get_label(gpio));
1052
1053         reserve(gpio_irq, gpio);
1054         set_label(gpio, label);
1055
1056         hard_local_irq_restore(flags);
1057
1058         port_setup(gpio, GPIO_USAGE);
1059
1060         return 0;
1061 }
1062
1063 void bfin_gpio_irq_free(unsigned gpio)
1064 {
1065         unsigned long flags;
1066
1067         if (check_gpio(gpio) < 0)
1068                 return;
1069
1070         flags = hard_local_irq_save();
1071
1072         if (unlikely(!is_reserved(gpio_irq, gpio, 0))) {
1073                 if (system_state == SYSTEM_BOOTING)
1074                         dump_stack();
1075                 gpio_error(gpio);
1076                 hard_local_irq_restore(flags);
1077                 return;
1078         }
1079
1080         unreserve(gpio_irq, gpio);
1081
1082         set_label(gpio, "free");
1083
1084         hard_local_irq_restore(flags);
1085 }
1086
1087 static inline void __bfin_gpio_direction_input(unsigned gpio)
1088 {
1089 #ifdef CONFIG_BF54x
1090         gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio);
1091 #else
1092         gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1093 #endif
1094         gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1095 }
1096
1097 int bfin_gpio_direction_input(unsigned gpio)
1098 {
1099         unsigned long flags;
1100
1101         if (unlikely(!is_reserved(gpio, gpio, 0))) {
1102                 gpio_error(gpio);
1103                 return -EINVAL;
1104         }
1105
1106         flags = hard_local_irq_save();
1107         __bfin_gpio_direction_input(gpio);
1108         AWA_DUMMY_READ(inen);
1109         hard_local_irq_restore(flags);
1110
1111         return 0;
1112 }
1113 EXPORT_SYMBOL(bfin_gpio_direction_input);
1114
1115 void bfin_gpio_irq_prepare(unsigned gpio)
1116 {
1117 #ifdef CONFIG_BF54x
1118         unsigned long flags;
1119 #endif
1120
1121         port_setup(gpio, GPIO_USAGE);
1122
1123 #ifdef CONFIG_BF54x
1124         flags = hard_local_irq_save();
1125         __bfin_gpio_direction_input(gpio);
1126         hard_local_irq_restore(flags);
1127 #endif
1128 }
1129
1130 void bfin_gpio_set_value(unsigned gpio, int arg)
1131 {
1132         if (arg)
1133                 gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1134         else
1135                 gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1136 }
1137 EXPORT_SYMBOL(bfin_gpio_set_value);
1138
1139 int bfin_gpio_direction_output(unsigned gpio, int value)
1140 {
1141         unsigned long flags;
1142
1143         if (unlikely(!is_reserved(gpio, gpio, 0))) {
1144                 gpio_error(gpio);
1145                 return -EINVAL;
1146         }
1147
1148         flags = hard_local_irq_save();
1149
1150         gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1151         gpio_set_value(gpio, value);
1152 #ifdef CONFIG_BF54x
1153         gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio);
1154 #else
1155         gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1156 #endif
1157
1158         AWA_DUMMY_READ(dir);
1159         hard_local_irq_restore(flags);
1160
1161         return 0;
1162 }
1163 EXPORT_SYMBOL(bfin_gpio_direction_output);
1164
1165 int bfin_gpio_get_value(unsigned gpio)
1166 {
1167 #ifdef CONFIG_BF54x
1168         return (1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio)));
1169 #else
1170         unsigned long flags;
1171
1172         if (unlikely(get_gpio_edge(gpio))) {
1173                 int ret;
1174                 flags = hard_local_irq_save();
1175                 set_gpio_edge(gpio, 0);
1176                 ret = get_gpio_data(gpio);
1177                 set_gpio_edge(gpio, 1);
1178                 hard_local_irq_restore(flags);
1179                 return ret;
1180         } else
1181                 return get_gpio_data(gpio);
1182 #endif
1183 }
1184 EXPORT_SYMBOL(bfin_gpio_get_value);
1185
1186 /* If we are booting from SPI and our board lacks a strong enough pull up,
1187  * the core can reset and execute the bootrom faster than the resistor can
1188  * pull the signal logically high.  To work around this (common) error in
1189  * board design, we explicitly set the pin back to GPIO mode, force /CS
1190  * high, and wait for the electrons to do their thing.
1191  *
1192  * This function only makes sense to be called from reset code, but it
1193  * lives here as we need to force all the GPIO states w/out going through
1194  * BUG() checks and such.
1195  */
1196 void bfin_reset_boot_spi_cs(unsigned short pin)
1197 {
1198         unsigned short gpio = P_IDENT(pin);
1199         port_setup(gpio, GPIO_USAGE);
1200         gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1201         AWA_DUMMY_READ(data_set);
1202         udelay(1);
1203 }
1204
1205 #if defined(CONFIG_PROC_FS)
1206 static int gpio_proc_read(char *buf, char **start, off_t offset,
1207                           int len, int *unused_i, void *unused_v)
1208 {
1209         int c, irq, gpio, outlen = 0;
1210
1211         for (c = 0; c < MAX_RESOURCES; c++) {
1212                 irq = is_reserved(gpio_irq, c, 1);
1213                 gpio = is_reserved(gpio, c, 1);
1214                 if (!check_gpio(c) && (gpio || irq))
1215                         len = sprintf(buf, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c,
1216                                  get_label(c), (gpio && irq) ? " *" : "",
1217                                  get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1218                 else if (is_reserved(peri, c, 1))
1219                         len = sprintf(buf, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c));
1220                 else
1221                         continue;
1222                 buf += len;
1223                 outlen += len;
1224         }
1225         return outlen;
1226 }
1227
1228 static __init int gpio_register_proc(void)
1229 {
1230         struct proc_dir_entry *proc_gpio;
1231
1232         proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1233         if (proc_gpio)
1234                 proc_gpio->read_proc = gpio_proc_read;
1235         return proc_gpio != NULL;
1236 }
1237 __initcall(gpio_register_proc);
1238 #endif
1239
1240 #ifdef CONFIG_GPIOLIB
1241 static int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
1242 {
1243         return bfin_gpio_direction_input(gpio);
1244 }
1245
1246 static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
1247 {
1248         return bfin_gpio_direction_output(gpio, level);
1249 }
1250
1251 static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
1252 {
1253         return bfin_gpio_get_value(gpio);
1254 }
1255
1256 static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
1257 {
1258         return bfin_gpio_set_value(gpio, value);
1259 }
1260
1261 static int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
1262 {
1263         return bfin_gpio_request(gpio, chip->label);
1264 }
1265
1266 static void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
1267 {
1268         return bfin_gpio_free(gpio);
1269 }
1270
1271 static int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
1272 {
1273         return gpio + GPIO_IRQ_BASE;
1274 }
1275
1276 static struct gpio_chip bfin_chip = {
1277         .label                  = "BFIN-GPIO",
1278         .direction_input        = bfin_gpiolib_direction_input,
1279         .get                    = bfin_gpiolib_get_value,
1280         .direction_output       = bfin_gpiolib_direction_output,
1281         .set                    = bfin_gpiolib_set_value,
1282         .request                = bfin_gpiolib_gpio_request,
1283         .free                   = bfin_gpiolib_gpio_free,
1284         .to_irq                 = bfin_gpiolib_gpio_to_irq,
1285         .base                   = 0,
1286         .ngpio                  = MAX_BLACKFIN_GPIOS,
1287 };
1288
1289 static int __init bfin_gpiolib_setup(void)
1290 {
1291         return gpiochip_add(&bfin_chip);
1292 }
1293 arch_initcall(bfin_gpiolib_setup);
1294 #endif