1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2015 Broadcom Corporation 3 * 4 * This file contains the Northstar plus (NSP) IOMUX driver that supports 5 * group based PINMUX configuration. The Northstar plus IOMUX controller 6 * allows pins to be individually muxed to GPIO function. The NAND and MMC is 7 * a group based selection. The gpio_a 8 - 11 are muxed with gpio_b and pwm. 8 * To select PWM, one need to enable the corresponding gpio_b as well. 9 * 10 * gpio_a (8 - 11) 11 * +---------- 12 * | 13 * gpio_a (8-11) | gpio_b (0 - 3) 14 * ------------------------+-------+---------- 15 * | 16 * | pwm (0 - 3) 17 * +---------- 18 */ 19 20 #include <linux/err.h> 21 #include <linux/io.h> 22 #include <linux/of.h> 23 #include <linux/platform_device.h> 24 #include <linux/seq_file.h> 25 #include <linux/slab.h> 26 27 #include <linux/pinctrl/pinconf-generic.h> 28 #include <linux/pinctrl/pinconf.h> 29 #include <linux/pinctrl/pinctrl.h> 30 #include <linux/pinctrl/pinmux.h> 31 32 #include "../core.h" 33 #include "../pinctrl-utils.h" 34 35 #define NSP_MUX_BASE0 0x00 36 #define NSP_MUX_BASE1 0x01 37 #define NSP_MUX_BASE2 0x02 38 /* 39 * nsp IOMUX register description 40 * 41 * @base: base 0 or base 1 42 * @shift: bit shift for mux configuration of a group 43 * @mask: bit mask of the function 44 * @alt: alternate function to set to 45 */ 46 struct nsp_mux { 47 unsigned int base; 48 unsigned int shift; 49 unsigned int mask; 50 unsigned int alt; 51 }; 52 53 /* 54 * Keep track of nsp IOMUX configuration and prevent double configuration 55 * 56 * @nsp_mux: nsp IOMUX register description 57 * @is_configured: flag to indicate whether a mux setting has already been 58 * configured 59 */ 60 struct nsp_mux_log { 61 struct nsp_mux mux; 62 bool is_configured; 63 }; 64 65 /* 66 * Group based IOMUX configuration 67 * 68 * @name: name of the group 69 * @pins: array of pins used by this group 70 * @num_pins: total number of pins used by this group 71 * @mux: nsp group based IOMUX configuration 72 */ 73 struct nsp_pin_group { 74 const char *name; 75 const unsigned int *pins; 76 const unsigned int num_pins; 77 const struct nsp_mux mux; 78 }; 79 80 /* 81 * nsp mux function and supported pin groups 82 * 83 * @name: name of the function 84 * @groups: array of groups that can be supported by this function 85 * @num_groups: total number of groups that can be supported by this function 86 */ 87 struct nsp_pin_function { 88 const char *name; 89 const char * const *groups; 90 const unsigned int num_groups; 91 }; 92 93 /* 94 * nsp IOMUX pinctrl core 95 * 96 * @pctl: pointer to pinctrl_dev 97 * @dev: pointer to device 98 * @base0: first mux register 99 * @base1: second mux register 100 * @base2: third mux register 101 * @groups: pointer to array of groups 102 * @num_groups: total number of groups 103 * @functions: pointer to array of functions 104 * @num_functions: total number of functions 105 * @mux_log: pointer to the array of mux logs 106 * @lock: lock to protect register access 107 */ 108 struct nsp_pinctrl { 109 struct pinctrl_dev *pctl; 110 struct device *dev; 111 void __iomem *base0; 112 void __iomem *base1; 113 void __iomem *base2; 114 const struct nsp_pin_group *groups; 115 unsigned int num_groups; 116 const struct nsp_pin_function *functions; 117 unsigned int num_functions; 118 struct nsp_mux_log *mux_log; 119 spinlock_t lock; 120 }; 121 122 /* 123 * Description of a pin in nsp 124 * 125 * @pin: pin number 126 * @name: pin name 127 * @gpio_select: reg data to select GPIO 128 */ 129 struct nsp_pin { 130 unsigned int pin; 131 char *name; 132 unsigned int gpio_select; 133 }; 134 135 #define NSP_PIN_DESC(p, n, g) \ 136 { \ 137 .pin = p, \ 138 .name = n, \ 139 .gpio_select = g, \ 140 } 141 142 /* 143 * List of muxable pins in nsp 144 */ 145 static struct nsp_pin nsp_pins[] = { 146 NSP_PIN_DESC(0, "spi_clk", 1), 147 NSP_PIN_DESC(1, "spi_ss", 1), 148 NSP_PIN_DESC(2, "spi_mosi", 1), 149 NSP_PIN_DESC(3, "spi_miso", 1), 150 NSP_PIN_DESC(4, "scl", 1), 151 NSP_PIN_DESC(5, "sda", 1), 152 NSP_PIN_DESC(6, "mdc", 1), 153 NSP_PIN_DESC(7, "mdio", 1), 154 NSP_PIN_DESC(8, "pwm0", 1), 155 NSP_PIN_DESC(9, "pwm1", 1), 156 NSP_PIN_DESC(10, "pwm2", 1), 157 NSP_PIN_DESC(11, "pwm3", 1), 158 NSP_PIN_DESC(12, "uart1_rx", 1), 159 NSP_PIN_DESC(13, "uart1_tx", 1), 160 NSP_PIN_DESC(14, "uart1_cts", 1), 161 NSP_PIN_DESC(15, "uart1_rts", 1), 162 NSP_PIN_DESC(16, "uart2_rx", 1), 163 NSP_PIN_DESC(17, "uart2_tx", 1), 164 NSP_PIN_DESC(18, "synce", 0), 165 NSP_PIN_DESC(19, "sata0_led", 0), 166 NSP_PIN_DESC(20, "sata1_led", 0), 167 NSP_PIN_DESC(21, "xtal_out", 1), 168 NSP_PIN_DESC(22, "sdio_pwr", 1), 169 NSP_PIN_DESC(23, "sdio_en_1p8v", 1), 170 NSP_PIN_DESC(24, "gpio_24", 1), 171 NSP_PIN_DESC(25, "gpio_25", 1), 172 NSP_PIN_DESC(26, "p5_led0", 0), 173 NSP_PIN_DESC(27, "p5_led1", 0), 174 NSP_PIN_DESC(28, "gpio_28", 1), 175 NSP_PIN_DESC(29, "gpio_29", 1), 176 NSP_PIN_DESC(30, "gpio_30", 1), 177 NSP_PIN_DESC(31, "gpio_31", 1), 178 NSP_PIN_DESC(32, "nand_ale", 0), 179 NSP_PIN_DESC(33, "nand_ce0", 0), 180 NSP_PIN_DESC(34, "nand_r/b", 0), 181 NSP_PIN_DESC(35, "nand_dq0", 0), 182 NSP_PIN_DESC(36, "nand_dq1", 0), 183 NSP_PIN_DESC(37, "nand_dq2", 0), 184 NSP_PIN_DESC(38, "nand_dq3", 0), 185 NSP_PIN_DESC(39, "nand_dq4", 0), 186 NSP_PIN_DESC(40, "nand_dq5", 0), 187 NSP_PIN_DESC(41, "nand_dq6", 0), 188 NSP_PIN_DESC(42, "nand_dq7", 0), 189 }; 190 191 /* 192 * List of groups of pins 193 */ 194 195 static const unsigned int spi_pins[] = {0, 1, 2, 3}; 196 static const unsigned int i2c_pins[] = {4, 5}; 197 static const unsigned int mdio_pins[] = {6, 7}; 198 static const unsigned int pwm0_pins[] = {8}; 199 static const unsigned int gpio_b_0_pins[] = {8}; 200 static const unsigned int pwm1_pins[] = {9}; 201 static const unsigned int gpio_b_1_pins[] = {9}; 202 static const unsigned int pwm2_pins[] = {10}; 203 static const unsigned int gpio_b_2_pins[] = {10}; 204 static const unsigned int pwm3_pins[] = {11}; 205 static const unsigned int gpio_b_3_pins[] = {11}; 206 static const unsigned int uart1_pins[] = {12, 13, 14, 15}; 207 static const unsigned int uart2_pins[] = {16, 17}; 208 static const unsigned int synce_pins[] = {18}; 209 static const unsigned int sata0_led_pins[] = {19}; 210 static const unsigned int sata1_led_pins[] = {20}; 211 static const unsigned int xtal_out_pins[] = {21}; 212 static const unsigned int sdio_pwr_pins[] = {22}; 213 static const unsigned int sdio_1p8v_pins[] = {23}; 214 static const unsigned int switch_p05_led0_pins[] = {26}; 215 static const unsigned int switch_p05_led1_pins[] = {27}; 216 static const unsigned int nand_pins[] = {32, 33, 34, 35, 36, 37, 38, 39, 217 40, 41, 42}; 218 static const unsigned int emmc_pins[] = {32, 33, 34, 35, 36, 37, 38, 39, 219 40, 41, 42}; 220 221 #define NSP_PIN_GROUP(group_name, ba, sh, ma, al) \ 222 { \ 223 .name = __stringify(group_name) "_grp", \ 224 .pins = group_name ## _pins, \ 225 .num_pins = ARRAY_SIZE(group_name ## _pins), \ 226 .mux = { \ 227 .base = ba, \ 228 .shift = sh, \ 229 .mask = ma, \ 230 .alt = al, \ 231 } \ 232 } 233 234 /* 235 * List of nsp pin groups 236 */ 237 static const struct nsp_pin_group nsp_pin_groups[] = { 238 NSP_PIN_GROUP(spi, NSP_MUX_BASE0, 0, 0x0f, 0x00), 239 NSP_PIN_GROUP(i2c, NSP_MUX_BASE0, 3, 0x03, 0x00), 240 NSP_PIN_GROUP(mdio, NSP_MUX_BASE0, 5, 0x03, 0x00), 241 NSP_PIN_GROUP(gpio_b_0, NSP_MUX_BASE0, 7, 0x01, 0x00), 242 NSP_PIN_GROUP(pwm0, NSP_MUX_BASE1, 0, 0x01, 0x01), 243 NSP_PIN_GROUP(gpio_b_1, NSP_MUX_BASE0, 8, 0x01, 0x00), 244 NSP_PIN_GROUP(pwm1, NSP_MUX_BASE1, 1, 0x01, 0x01), 245 NSP_PIN_GROUP(gpio_b_2, NSP_MUX_BASE0, 9, 0x01, 0x00), 246 NSP_PIN_GROUP(pwm2, NSP_MUX_BASE1, 2, 0x01, 0x01), 247 NSP_PIN_GROUP(gpio_b_3, NSP_MUX_BASE0, 10, 0x01, 0x00), 248 NSP_PIN_GROUP(pwm3, NSP_MUX_BASE1, 3, 0x01, 0x01), 249 NSP_PIN_GROUP(uart1, NSP_MUX_BASE0, 11, 0x0f, 0x00), 250 NSP_PIN_GROUP(uart2, NSP_MUX_BASE0, 15, 0x03, 0x00), 251 NSP_PIN_GROUP(synce, NSP_MUX_BASE0, 17, 0x01, 0x01), 252 NSP_PIN_GROUP(sata0_led, NSP_MUX_BASE0, 18, 0x01, 0x01), 253 NSP_PIN_GROUP(sata1_led, NSP_MUX_BASE0, 19, 0x01, 0x01), 254 NSP_PIN_GROUP(xtal_out, NSP_MUX_BASE0, 20, 0x01, 0x00), 255 NSP_PIN_GROUP(sdio_pwr, NSP_MUX_BASE0, 21, 0x01, 0x00), 256 NSP_PIN_GROUP(sdio_1p8v, NSP_MUX_BASE0, 22, 0x01, 0x00), 257 NSP_PIN_GROUP(switch_p05_led0, NSP_MUX_BASE0, 26, 0x01, 0x01), 258 NSP_PIN_GROUP(switch_p05_led1, NSP_MUX_BASE0, 27, 0x01, 0x01), 259 NSP_PIN_GROUP(nand, NSP_MUX_BASE2, 0, 0x01, 0x00), 260 NSP_PIN_GROUP(emmc, NSP_MUX_BASE2, 0, 0x01, 0x01) 261 }; 262 263 /* 264 * List of groups supported by functions 265 */ 266 267 static const char * const spi_grps[] = {"spi_grp"}; 268 static const char * const i2c_grps[] = {"i2c_grp"}; 269 static const char * const mdio_grps[] = {"mdio_grp"}; 270 static const char * const pwm_grps[] = {"pwm0_grp", "pwm1_grp", "pwm2_grp" 271 , "pwm3_grp"}; 272 static const char * const gpio_b_grps[] = {"gpio_b_0_grp", "gpio_b_1_grp", 273 "gpio_b_2_grp", "gpio_b_3_grp"}; 274 static const char * const uart1_grps[] = {"uart1_grp"}; 275 static const char * const uart2_grps[] = {"uart2_grp"}; 276 static const char * const synce_grps[] = {"synce_grp"}; 277 static const char * const sata_led_grps[] = {"sata0_led_grp", "sata1_led_grp"}; 278 static const char * const xtal_out_grps[] = {"xtal_out_grp"}; 279 static const char * const sdio_grps[] = {"sdio_pwr_grp", "sdio_1p8v_grp"}; 280 static const char * const switch_led_grps[] = {"switch_p05_led0_grp", 281 "switch_p05_led1_grp"}; 282 static const char * const nand_grps[] = {"nand_grp"}; 283 static const char * const emmc_grps[] = {"emmc_grp"}; 284 285 #define NSP_PIN_FUNCTION(func) \ 286 { \ 287 .name = #func, \ 288 .groups = func ## _grps, \ 289 .num_groups = ARRAY_SIZE(func ## _grps), \ 290 } 291 292 /* 293 * List of supported functions in nsp 294 */ 295 static const struct nsp_pin_function nsp_pin_functions[] = { 296 NSP_PIN_FUNCTION(spi), 297 NSP_PIN_FUNCTION(i2c), 298 NSP_PIN_FUNCTION(mdio), 299 NSP_PIN_FUNCTION(pwm), 300 NSP_PIN_FUNCTION(gpio_b), 301 NSP_PIN_FUNCTION(uart1), 302 NSP_PIN_FUNCTION(uart2), 303 NSP_PIN_FUNCTION(synce), 304 NSP_PIN_FUNCTION(sata_led), 305 NSP_PIN_FUNCTION(xtal_out), 306 NSP_PIN_FUNCTION(sdio), 307 NSP_PIN_FUNCTION(switch_led), 308 NSP_PIN_FUNCTION(nand), 309 NSP_PIN_FUNCTION(emmc) 310 }; 311 nsp_get_groups_count(struct pinctrl_dev * pctrl_dev)312 static int nsp_get_groups_count(struct pinctrl_dev *pctrl_dev) 313 { 314 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 315 316 return pinctrl->num_groups; 317 } 318 nsp_get_group_name(struct pinctrl_dev * pctrl_dev,unsigned int selector)319 static const char *nsp_get_group_name(struct pinctrl_dev *pctrl_dev, 320 unsigned int selector) 321 { 322 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 323 324 return pinctrl->groups[selector].name; 325 } 326 nsp_get_group_pins(struct pinctrl_dev * pctrl_dev,unsigned int selector,const unsigned int ** pins,unsigned int * num_pins)327 static int nsp_get_group_pins(struct pinctrl_dev *pctrl_dev, 328 unsigned int selector, const unsigned int **pins, 329 unsigned int *num_pins) 330 { 331 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 332 333 *pins = pinctrl->groups[selector].pins; 334 *num_pins = pinctrl->groups[selector].num_pins; 335 336 return 0; 337 } 338 nsp_pin_dbg_show(struct pinctrl_dev * pctrl_dev,struct seq_file * s,unsigned int offset)339 static void nsp_pin_dbg_show(struct pinctrl_dev *pctrl_dev, 340 struct seq_file *s, unsigned int offset) 341 { 342 seq_printf(s, " %s", dev_name(pctrl_dev->dev)); 343 } 344 345 static const struct pinctrl_ops nsp_pinctrl_ops = { 346 .get_groups_count = nsp_get_groups_count, 347 .get_group_name = nsp_get_group_name, 348 .get_group_pins = nsp_get_group_pins, 349 .pin_dbg_show = nsp_pin_dbg_show, 350 .dt_node_to_map = pinconf_generic_dt_node_to_map_group, 351 .dt_free_map = pinctrl_utils_free_map, 352 }; 353 nsp_get_functions_count(struct pinctrl_dev * pctrl_dev)354 static int nsp_get_functions_count(struct pinctrl_dev *pctrl_dev) 355 { 356 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 357 358 return pinctrl->num_functions; 359 } 360 nsp_get_function_name(struct pinctrl_dev * pctrl_dev,unsigned int selector)361 static const char *nsp_get_function_name(struct pinctrl_dev *pctrl_dev, 362 unsigned int selector) 363 { 364 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 365 366 return pinctrl->functions[selector].name; 367 } 368 nsp_get_function_groups(struct pinctrl_dev * pctrl_dev,unsigned int selector,const char * const ** groups,unsigned * const num_groups)369 static int nsp_get_function_groups(struct pinctrl_dev *pctrl_dev, 370 unsigned int selector, 371 const char * const **groups, 372 unsigned * const num_groups) 373 { 374 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 375 376 *groups = pinctrl->functions[selector].groups; 377 *num_groups = pinctrl->functions[selector].num_groups; 378 379 return 0; 380 } 381 nsp_pinmux_set(struct nsp_pinctrl * pinctrl,const struct nsp_pin_function * func,const struct nsp_pin_group * grp,struct nsp_mux_log * mux_log)382 static int nsp_pinmux_set(struct nsp_pinctrl *pinctrl, 383 const struct nsp_pin_function *func, 384 const struct nsp_pin_group *grp, 385 struct nsp_mux_log *mux_log) 386 { 387 const struct nsp_mux *mux = &grp->mux; 388 int i; 389 u32 val, mask; 390 unsigned long flags; 391 void __iomem *base_address; 392 393 for (i = 0; i < pinctrl->num_groups; i++) { 394 if ((mux->shift != mux_log[i].mux.shift) || 395 (mux->base != mux_log[i].mux.base)) 396 continue; 397 398 /* if this is a new configuration, just do it! */ 399 if (!mux_log[i].is_configured) 400 break; 401 402 /* 403 * IOMUX has been configured previously and one is trying to 404 * configure it to a different function 405 */ 406 if (mux_log[i].mux.alt != mux->alt) { 407 dev_err(pinctrl->dev, 408 "double configuration error detected!\n"); 409 dev_err(pinctrl->dev, "func:%s grp:%s\n", 410 func->name, grp->name); 411 return -EINVAL; 412 } 413 414 return 0; 415 } 416 if (i == pinctrl->num_groups) 417 return -EINVAL; 418 419 mask = mux->mask; 420 mux_log[i].mux.alt = mux->alt; 421 mux_log[i].is_configured = true; 422 423 switch (mux->base) { 424 case NSP_MUX_BASE0: 425 base_address = pinctrl->base0; 426 break; 427 428 case NSP_MUX_BASE1: 429 base_address = pinctrl->base1; 430 break; 431 432 case NSP_MUX_BASE2: 433 base_address = pinctrl->base2; 434 break; 435 436 default: 437 return -EINVAL; 438 } 439 440 spin_lock_irqsave(&pinctrl->lock, flags); 441 val = readl(base_address); 442 val &= ~(mask << grp->mux.shift); 443 val |= grp->mux.alt << grp->mux.shift; 444 writel(val, base_address); 445 spin_unlock_irqrestore(&pinctrl->lock, flags); 446 447 return 0; 448 } 449 nsp_pinmux_enable(struct pinctrl_dev * pctrl_dev,unsigned int func_select,unsigned int grp_select)450 static int nsp_pinmux_enable(struct pinctrl_dev *pctrl_dev, 451 unsigned int func_select, unsigned int grp_select) 452 { 453 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 454 const struct nsp_pin_function *func; 455 const struct nsp_pin_group *grp; 456 457 if (grp_select >= pinctrl->num_groups || 458 func_select >= pinctrl->num_functions) 459 return -EINVAL; 460 461 func = &pinctrl->functions[func_select]; 462 grp = &pinctrl->groups[grp_select]; 463 464 dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n", 465 func_select, func->name, grp_select, grp->name); 466 467 dev_dbg(pctrl_dev->dev, "shift:%u alt:%u\n", grp->mux.shift, 468 grp->mux.alt); 469 470 return nsp_pinmux_set(pinctrl, func, grp, pinctrl->mux_log); 471 } 472 473 nsp_gpio_request_enable(struct pinctrl_dev * pctrl_dev,struct pinctrl_gpio_range * range,unsigned int pin)474 static int nsp_gpio_request_enable(struct pinctrl_dev *pctrl_dev, 475 struct pinctrl_gpio_range *range, 476 unsigned int pin) 477 { 478 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 479 u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data; 480 u32 val; 481 unsigned long flags; 482 483 spin_lock_irqsave(&pinctrl->lock, flags); 484 val = readl(pinctrl->base0); 485 if ((val & BIT(pin)) != (*gpio_select << pin)) { 486 val &= ~BIT(pin); 487 val |= *gpio_select << pin; 488 writel(val, pinctrl->base0); 489 } 490 spin_unlock_irqrestore(&pinctrl->lock, flags); 491 492 return 0; 493 } 494 nsp_gpio_disable_free(struct pinctrl_dev * pctrl_dev,struct pinctrl_gpio_range * range,unsigned int pin)495 static void nsp_gpio_disable_free(struct pinctrl_dev *pctrl_dev, 496 struct pinctrl_gpio_range *range, 497 unsigned int pin) 498 { 499 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 500 u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data; 501 u32 val; 502 unsigned long flags; 503 504 spin_lock_irqsave(&pinctrl->lock, flags); 505 val = readl(pinctrl->base0); 506 if ((val & (1 << pin)) == (*gpio_select << pin)) { 507 val &= ~(1 << pin); 508 if (!(*gpio_select)) 509 val |= (1 << pin); 510 writel(val, pinctrl->base0); 511 } 512 spin_unlock_irqrestore(&pinctrl->lock, flags); 513 } 514 515 static const struct pinmux_ops nsp_pinmux_ops = { 516 .get_functions_count = nsp_get_functions_count, 517 .get_function_name = nsp_get_function_name, 518 .get_function_groups = nsp_get_function_groups, 519 .set_mux = nsp_pinmux_enable, 520 .gpio_request_enable = nsp_gpio_request_enable, 521 .gpio_disable_free = nsp_gpio_disable_free, 522 }; 523 524 static struct pinctrl_desc nsp_pinctrl_desc = { 525 .name = "nsp-pinmux", 526 .pctlops = &nsp_pinctrl_ops, 527 .pmxops = &nsp_pinmux_ops, 528 }; 529 nsp_mux_log_init(struct nsp_pinctrl * pinctrl)530 static int nsp_mux_log_init(struct nsp_pinctrl *pinctrl) 531 { 532 struct nsp_mux_log *log; 533 unsigned int i; 534 u32 no_of_groups = ARRAY_SIZE(nsp_pin_groups); 535 536 pinctrl->mux_log = devm_kcalloc(pinctrl->dev, no_of_groups, 537 sizeof(struct nsp_mux_log), 538 GFP_KERNEL); 539 if (!pinctrl->mux_log) 540 return -ENOMEM; 541 542 for (i = 0; i < no_of_groups; i++) { 543 log = &pinctrl->mux_log[i]; 544 log->mux.base = nsp_pin_groups[i].mux.base; 545 log->mux.shift = nsp_pin_groups[i].mux.shift; 546 log->mux.alt = 0; 547 log->is_configured = false; 548 } 549 550 return 0; 551 } 552 nsp_pinmux_probe(struct platform_device * pdev)553 static int nsp_pinmux_probe(struct platform_device *pdev) 554 { 555 struct nsp_pinctrl *pinctrl; 556 struct resource *res; 557 int i, ret; 558 struct pinctrl_pin_desc *pins; 559 unsigned int num_pins = ARRAY_SIZE(nsp_pins); 560 561 pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL); 562 if (!pinctrl) 563 return -ENOMEM; 564 pinctrl->dev = &pdev->dev; 565 platform_set_drvdata(pdev, pinctrl); 566 spin_lock_init(&pinctrl->lock); 567 568 pinctrl->base0 = devm_platform_ioremap_resource(pdev, 0); 569 if (IS_ERR(pinctrl->base0)) 570 return PTR_ERR(pinctrl->base0); 571 572 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 573 if (!res) 574 return -EINVAL; 575 pinctrl->base1 = devm_ioremap(&pdev->dev, res->start, 576 resource_size(res)); 577 if (!pinctrl->base1) { 578 dev_err(&pdev->dev, "unable to map I/O space\n"); 579 return -ENOMEM; 580 } 581 582 pinctrl->base2 = devm_platform_ioremap_resource(pdev, 2); 583 if (IS_ERR(pinctrl->base2)) 584 return PTR_ERR(pinctrl->base2); 585 586 ret = nsp_mux_log_init(pinctrl); 587 if (ret) { 588 dev_err(&pdev->dev, "unable to initialize IOMUX log\n"); 589 return ret; 590 } 591 592 pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL); 593 if (!pins) 594 return -ENOMEM; 595 596 for (i = 0; i < num_pins; i++) { 597 pins[i].number = nsp_pins[i].pin; 598 pins[i].name = nsp_pins[i].name; 599 pins[i].drv_data = &nsp_pins[i].gpio_select; 600 } 601 602 pinctrl->groups = nsp_pin_groups; 603 pinctrl->num_groups = ARRAY_SIZE(nsp_pin_groups); 604 pinctrl->functions = nsp_pin_functions; 605 pinctrl->num_functions = ARRAY_SIZE(nsp_pin_functions); 606 nsp_pinctrl_desc.pins = pins; 607 nsp_pinctrl_desc.npins = num_pins; 608 609 pinctrl->pctl = devm_pinctrl_register(&pdev->dev, &nsp_pinctrl_desc, 610 pinctrl); 611 if (IS_ERR(pinctrl->pctl)) { 612 dev_err(&pdev->dev, "unable to register nsp IOMUX pinctrl\n"); 613 return PTR_ERR(pinctrl->pctl); 614 } 615 616 return 0; 617 } 618 619 static const struct of_device_id nsp_pinmux_of_match[] = { 620 { .compatible = "brcm,nsp-pinmux" }, 621 { } 622 }; 623 624 static struct platform_driver nsp_pinmux_driver = { 625 .driver = { 626 .name = "nsp-pinmux", 627 .of_match_table = nsp_pinmux_of_match, 628 }, 629 .probe = nsp_pinmux_probe, 630 }; 631 nsp_pinmux_init(void)632 static int __init nsp_pinmux_init(void) 633 { 634 return platform_driver_register(&nsp_pinmux_driver); 635 } 636 arch_initcall(nsp_pinmux_init); 637