Tony Prisk | 170c615 | 2013-02-20 09:32:19 +1300 | [diff] [blame] | 1 | /* |
| 2 | * Pinctrl driver for the Wondermedia SoC's |
| 3 | * |
| 4 | * Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/io.h> |
| 20 | #include <linux/irq.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/of_irq.h> |
| 24 | #include <linux/pinctrl/consumer.h> |
| 25 | #include <linux/pinctrl/machine.h> |
| 26 | #include <linux/pinctrl/pinconf.h> |
| 27 | #include <linux/pinctrl/pinconf-generic.h> |
| 28 | #include <linux/pinctrl/pinctrl.h> |
| 29 | #include <linux/pinctrl/pinmux.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <linux/slab.h> |
| 32 | |
| 33 | #include "pinctrl-wmt.h" |
| 34 | |
| 35 | static inline void wmt_setbits(struct wmt_pinctrl_data *data, u32 reg, |
| 36 | u32 mask) |
| 37 | { |
| 38 | u32 val; |
| 39 | |
| 40 | val = readl_relaxed(data->base + reg); |
| 41 | val |= mask; |
| 42 | writel_relaxed(val, data->base + reg); |
| 43 | } |
| 44 | |
| 45 | static inline void wmt_clearbits(struct wmt_pinctrl_data *data, u32 reg, |
| 46 | u32 mask) |
| 47 | { |
| 48 | u32 val; |
| 49 | |
| 50 | val = readl_relaxed(data->base + reg); |
| 51 | val &= ~mask; |
| 52 | writel_relaxed(val, data->base + reg); |
| 53 | } |
| 54 | |
| 55 | enum wmt_func_sel { |
| 56 | WMT_FSEL_GPIO_IN = 0, |
| 57 | WMT_FSEL_GPIO_OUT = 1, |
| 58 | WMT_FSEL_ALT = 2, |
| 59 | WMT_FSEL_COUNT = 3, |
| 60 | }; |
| 61 | |
| 62 | static const char * const wmt_functions[WMT_FSEL_COUNT] = { |
| 63 | [WMT_FSEL_GPIO_IN] = "gpio_in", |
| 64 | [WMT_FSEL_GPIO_OUT] = "gpio_out", |
| 65 | [WMT_FSEL_ALT] = "alt", |
| 66 | }; |
| 67 | |
| 68 | static int wmt_pmx_get_functions_count(struct pinctrl_dev *pctldev) |
| 69 | { |
| 70 | return WMT_FSEL_COUNT; |
| 71 | } |
| 72 | |
| 73 | static const char *wmt_pmx_get_function_name(struct pinctrl_dev *pctldev, |
| 74 | unsigned selector) |
| 75 | { |
| 76 | return wmt_functions[selector]; |
| 77 | } |
| 78 | |
| 79 | static int wmt_pmx_get_function_groups(struct pinctrl_dev *pctldev, |
| 80 | unsigned selector, |
| 81 | const char * const **groups, |
| 82 | unsigned * const num_groups) |
| 83 | { |
| 84 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 85 | |
| 86 | /* every pin does every function */ |
| 87 | *groups = data->groups; |
| 88 | *num_groups = data->ngroups; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static int wmt_set_pinmux(struct wmt_pinctrl_data *data, unsigned func, |
| 94 | unsigned pin) |
| 95 | { |
| 96 | u32 bank = WMT_BANK_FROM_PIN(pin); |
| 97 | u32 bit = WMT_BIT_FROM_PIN(pin); |
| 98 | u32 reg_en = data->banks[bank].reg_en; |
| 99 | u32 reg_dir = data->banks[bank].reg_dir; |
| 100 | |
| 101 | if (reg_dir == NO_REG) { |
| 102 | dev_err(data->dev, "pin:%d no direction register defined\n", |
| 103 | pin); |
| 104 | return -EINVAL; |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * If reg_en == NO_REG, we assume it is a dedicated GPIO and cannot be |
| 109 | * disabled (as on VT8500) and that no alternate function is available. |
| 110 | */ |
| 111 | switch (func) { |
| 112 | case WMT_FSEL_GPIO_IN: |
| 113 | if (reg_en != NO_REG) |
| 114 | wmt_setbits(data, reg_en, BIT(bit)); |
| 115 | wmt_clearbits(data, reg_dir, BIT(bit)); |
| 116 | break; |
| 117 | case WMT_FSEL_GPIO_OUT: |
| 118 | if (reg_en != NO_REG) |
| 119 | wmt_setbits(data, reg_en, BIT(bit)); |
| 120 | wmt_setbits(data, reg_dir, BIT(bit)); |
| 121 | break; |
| 122 | case WMT_FSEL_ALT: |
| 123 | if (reg_en == NO_REG) { |
| 124 | dev_err(data->dev, "pin:%d no alt function available\n", |
| 125 | pin); |
| 126 | return -EINVAL; |
| 127 | } |
| 128 | wmt_clearbits(data, reg_en, BIT(bit)); |
| 129 | } |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | static int wmt_pmx_enable(struct pinctrl_dev *pctldev, |
| 135 | unsigned func_selector, |
| 136 | unsigned group_selector) |
| 137 | { |
| 138 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 139 | u32 pinnum = data->pins[group_selector].number; |
| 140 | |
| 141 | return wmt_set_pinmux(data, func_selector, pinnum); |
| 142 | } |
| 143 | |
| 144 | static void wmt_pmx_disable(struct pinctrl_dev *pctldev, |
| 145 | unsigned func_selector, |
| 146 | unsigned group_selector) |
| 147 | { |
| 148 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 149 | u32 pinnum = data->pins[group_selector].number; |
| 150 | |
| 151 | /* disable by setting GPIO_IN */ |
| 152 | wmt_set_pinmux(data, WMT_FSEL_GPIO_IN, pinnum); |
| 153 | } |
| 154 | |
| 155 | static void wmt_pmx_gpio_disable_free(struct pinctrl_dev *pctldev, |
| 156 | struct pinctrl_gpio_range *range, |
| 157 | unsigned offset) |
| 158 | { |
| 159 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 160 | |
| 161 | /* disable by setting GPIO_IN */ |
| 162 | wmt_set_pinmux(data, WMT_FSEL_GPIO_IN, offset); |
| 163 | } |
| 164 | |
| 165 | static int wmt_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 166 | struct pinctrl_gpio_range *range, |
| 167 | unsigned offset, |
| 168 | bool input) |
| 169 | { |
| 170 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 171 | |
| 172 | wmt_set_pinmux(data, (input ? WMT_FSEL_GPIO_IN : WMT_FSEL_GPIO_OUT), |
| 173 | offset); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static struct pinmux_ops wmt_pinmux_ops = { |
| 179 | .get_functions_count = wmt_pmx_get_functions_count, |
| 180 | .get_function_name = wmt_pmx_get_function_name, |
| 181 | .get_function_groups = wmt_pmx_get_function_groups, |
| 182 | .enable = wmt_pmx_enable, |
| 183 | .disable = wmt_pmx_disable, |
| 184 | .gpio_disable_free = wmt_pmx_gpio_disable_free, |
| 185 | .gpio_set_direction = wmt_pmx_gpio_set_direction, |
| 186 | }; |
| 187 | |
| 188 | static int wmt_get_groups_count(struct pinctrl_dev *pctldev) |
| 189 | { |
| 190 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 191 | |
| 192 | return data->ngroups; |
| 193 | } |
| 194 | |
| 195 | static const char *wmt_get_group_name(struct pinctrl_dev *pctldev, |
| 196 | unsigned selector) |
| 197 | { |
| 198 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 199 | |
| 200 | return data->groups[selector]; |
| 201 | } |
| 202 | |
| 203 | static int wmt_get_group_pins(struct pinctrl_dev *pctldev, |
| 204 | unsigned selector, |
| 205 | const unsigned **pins, |
| 206 | unsigned *num_pins) |
| 207 | { |
| 208 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 209 | |
| 210 | *pins = &data->pins[selector].number; |
| 211 | *num_pins = 1; |
| 212 | |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static int wmt_pctl_find_group_by_pin(struct wmt_pinctrl_data *data, u32 pin) |
| 217 | { |
| 218 | int i; |
| 219 | |
| 220 | for (i = 0; i < data->npins; i++) { |
| 221 | if (data->pins[i].number == pin) |
| 222 | return i; |
| 223 | } |
| 224 | |
| 225 | return -EINVAL; |
| 226 | } |
| 227 | |
| 228 | static int wmt_pctl_dt_node_to_map_func(struct wmt_pinctrl_data *data, |
| 229 | struct device_node *np, |
| 230 | u32 pin, u32 fnum, |
| 231 | struct pinctrl_map **maps) |
| 232 | { |
| 233 | int group; |
| 234 | struct pinctrl_map *map = *maps; |
| 235 | |
| 236 | if (fnum >= ARRAY_SIZE(wmt_functions)) { |
| 237 | dev_err(data->dev, "invalid wm,function %d\n", fnum); |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | |
| 241 | group = wmt_pctl_find_group_by_pin(data, pin); |
| 242 | if (group < 0) { |
| 243 | dev_err(data->dev, "unable to match pin %d to group\n", pin); |
| 244 | return group; |
| 245 | } |
| 246 | |
| 247 | map->type = PIN_MAP_TYPE_MUX_GROUP; |
| 248 | map->data.mux.group = data->groups[group]; |
| 249 | map->data.mux.function = wmt_functions[fnum]; |
| 250 | (*maps)++; |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int wmt_pctl_dt_node_to_map_pull(struct wmt_pinctrl_data *data, |
| 256 | struct device_node *np, |
| 257 | u32 pin, u32 pull, |
| 258 | struct pinctrl_map **maps) |
| 259 | { |
| 260 | int group; |
| 261 | unsigned long *configs; |
| 262 | struct pinctrl_map *map = *maps; |
| 263 | |
| 264 | if (pull > 2) { |
| 265 | dev_err(data->dev, "invalid wm,pull %d\n", pull); |
| 266 | return -EINVAL; |
| 267 | } |
| 268 | |
| 269 | group = wmt_pctl_find_group_by_pin(data, pin); |
| 270 | if (group < 0) { |
| 271 | dev_err(data->dev, "unable to match pin %d to group\n", pin); |
| 272 | return group; |
| 273 | } |
| 274 | |
| 275 | configs = kzalloc(sizeof(*configs), GFP_KERNEL); |
| 276 | if (!configs) |
| 277 | return -ENOMEM; |
| 278 | |
| 279 | configs[0] = pull; |
| 280 | |
| 281 | map->type = PIN_MAP_TYPE_CONFIGS_PIN; |
| 282 | map->data.configs.group_or_pin = data->groups[group]; |
| 283 | map->data.configs.configs = configs; |
| 284 | map->data.configs.num_configs = 1; |
| 285 | (*maps)++; |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static void wmt_pctl_dt_free_map(struct pinctrl_dev *pctldev, |
| 291 | struct pinctrl_map *maps, |
| 292 | unsigned num_maps) |
| 293 | { |
| 294 | int i; |
| 295 | |
| 296 | for (i = 0; i < num_maps; i++) |
| 297 | if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN) |
| 298 | kfree(maps[i].data.configs.configs); |
| 299 | |
| 300 | kfree(maps); |
| 301 | } |
| 302 | |
| 303 | static int wmt_pctl_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 304 | struct device_node *np, |
| 305 | struct pinctrl_map **map, |
| 306 | unsigned *num_maps) |
| 307 | { |
| 308 | struct pinctrl_map *maps, *cur_map; |
| 309 | struct property *pins, *funcs, *pulls; |
| 310 | u32 pin, func, pull; |
| 311 | int num_pins, num_funcs, num_pulls, maps_per_pin; |
| 312 | int i, err; |
| 313 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 314 | |
| 315 | pins = of_find_property(np, "wm,pins", NULL); |
| 316 | if (!pins) { |
| 317 | dev_err(data->dev, "missing wmt,pins property\n"); |
| 318 | return -EINVAL; |
| 319 | } |
| 320 | |
| 321 | funcs = of_find_property(np, "wm,function", NULL); |
| 322 | pulls = of_find_property(np, "wm,pull", NULL); |
| 323 | |
| 324 | if (!funcs && !pulls) { |
| 325 | dev_err(data->dev, "neither wm,function nor wm,pull specified\n"); |
| 326 | return -EINVAL; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * The following lines calculate how many values are defined for each |
| 331 | * of the properties. |
| 332 | */ |
| 333 | num_pins = pins->length / sizeof(u32); |
| 334 | num_funcs = funcs ? (funcs->length / sizeof(u32)) : 0; |
| 335 | num_pulls = pulls ? (pulls->length / sizeof(u32)) : 0; |
| 336 | |
| 337 | if (num_funcs > 1 && num_funcs != num_pins) { |
| 338 | dev_err(data->dev, "wm,function must have 1 or %d entries\n", |
| 339 | num_pins); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | |
| 343 | if (num_pulls > 1 && num_pulls != num_pins) { |
| 344 | dev_err(data->dev, "wm,pull must have 1 or %d entries\n", |
| 345 | num_pins); |
| 346 | return -EINVAL; |
| 347 | } |
| 348 | |
| 349 | maps_per_pin = 0; |
| 350 | if (num_funcs) |
| 351 | maps_per_pin++; |
| 352 | if (num_pulls) |
| 353 | maps_per_pin++; |
| 354 | |
| 355 | cur_map = maps = kzalloc(num_pins * maps_per_pin * sizeof(*maps), |
| 356 | GFP_KERNEL); |
| 357 | if (!maps) |
| 358 | return -ENOMEM; |
| 359 | |
| 360 | for (i = 0; i < num_pins; i++) { |
| 361 | err = of_property_read_u32_index(np, "wm,pins", i, &pin); |
| 362 | if (err) |
| 363 | goto fail; |
| 364 | |
| 365 | if (pin >= (data->nbanks * 32)) { |
| 366 | dev_err(data->dev, "invalid wm,pins value\n"); |
| 367 | err = -EINVAL; |
| 368 | goto fail; |
| 369 | } |
| 370 | |
| 371 | if (num_funcs) { |
| 372 | err = of_property_read_u32_index(np, "wm,function", |
| 373 | (num_funcs > 1 ? i : 0), &func); |
| 374 | if (err) |
| 375 | goto fail; |
| 376 | |
| 377 | err = wmt_pctl_dt_node_to_map_func(data, np, pin, func, |
| 378 | &cur_map); |
| 379 | if (err) |
| 380 | goto fail; |
| 381 | } |
| 382 | |
| 383 | if (num_pulls) { |
| 384 | err = of_property_read_u32_index(np, "wm,pull", |
| 385 | (num_pulls > 1 ? i : 0), &pull); |
| 386 | if (err) |
| 387 | goto fail; |
| 388 | |
| 389 | err = wmt_pctl_dt_node_to_map_pull(data, np, pin, pull, |
| 390 | &cur_map); |
| 391 | if (err) |
| 392 | goto fail; |
| 393 | } |
| 394 | } |
| 395 | *map = maps; |
| 396 | *num_maps = num_pins * maps_per_pin; |
| 397 | return 0; |
| 398 | |
| 399 | /* |
| 400 | * The fail path removes any maps that have been allocated. The fail path is |
| 401 | * only called from code after maps has been kzalloc'd. It is also safe to |
| 402 | * pass 'num_pins * maps_per_pin' as the map count even though we probably |
| 403 | * failed before all the mappings were read as all maps are allocated at once, |
| 404 | * and configs are only allocated for .type = PIN_MAP_TYPE_CONFIGS_PIN - there |
| 405 | * is no failpath where a config can be allocated without .type being set. |
| 406 | */ |
| 407 | fail: |
| 408 | wmt_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin); |
| 409 | return err; |
| 410 | } |
| 411 | |
| 412 | static struct pinctrl_ops wmt_pctl_ops = { |
| 413 | .get_groups_count = wmt_get_groups_count, |
| 414 | .get_group_name = wmt_get_group_name, |
| 415 | .get_group_pins = wmt_get_group_pins, |
| 416 | .dt_node_to_map = wmt_pctl_dt_node_to_map, |
| 417 | .dt_free_map = wmt_pctl_dt_free_map, |
| 418 | }; |
| 419 | |
| 420 | static int wmt_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
| 421 | unsigned long *config) |
| 422 | { |
| 423 | return -ENOTSUPP; |
| 424 | } |
| 425 | |
| 426 | static int wmt_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, |
| 427 | unsigned long config) |
| 428 | { |
| 429 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); |
| 430 | enum pin_config_param param = pinconf_to_config_param(config); |
| 431 | u16 arg = pinconf_to_config_argument(config); |
| 432 | u32 bank = WMT_BANK_FROM_PIN(pin); |
| 433 | u32 bit = WMT_BIT_FROM_PIN(pin); |
| 434 | u32 reg_pull_en = data->banks[bank].reg_pull_en; |
| 435 | u32 reg_pull_cfg = data->banks[bank].reg_pull_cfg; |
| 436 | |
| 437 | if ((reg_pull_en == NO_REG) || (reg_pull_cfg == NO_REG)) { |
| 438 | dev_err(data->dev, "bias functions not supported on pin %d\n", |
| 439 | pin); |
| 440 | return -EINVAL; |
| 441 | } |
| 442 | |
| 443 | if ((param == PIN_CONFIG_BIAS_PULL_DOWN) || |
| 444 | (param == PIN_CONFIG_BIAS_PULL_UP)) { |
| 445 | if (arg == 0) |
| 446 | param = PIN_CONFIG_BIAS_DISABLE; |
| 447 | } |
| 448 | |
| 449 | switch (param) { |
| 450 | case PIN_CONFIG_BIAS_DISABLE: |
| 451 | wmt_clearbits(data, reg_pull_en, BIT(bit)); |
| 452 | break; |
| 453 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 454 | wmt_clearbits(data, reg_pull_cfg, BIT(bit)); |
| 455 | wmt_setbits(data, reg_pull_en, BIT(bit)); |
| 456 | break; |
| 457 | case PIN_CONFIG_BIAS_PULL_UP: |
| 458 | wmt_setbits(data, reg_pull_cfg, BIT(bit)); |
| 459 | wmt_setbits(data, reg_pull_en, BIT(bit)); |
| 460 | break; |
| 461 | default: |
| 462 | dev_err(data->dev, "unknown pinconf param\n"); |
| 463 | return -EINVAL; |
| 464 | } |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static struct pinconf_ops wmt_pinconf_ops = { |
| 470 | .pin_config_get = wmt_pinconf_get, |
| 471 | .pin_config_set = wmt_pinconf_set, |
| 472 | }; |
| 473 | |
| 474 | static struct pinctrl_desc wmt_desc = { |
| 475 | .owner = THIS_MODULE, |
| 476 | .name = "pinctrl-wmt", |
| 477 | .pctlops = &wmt_pctl_ops, |
| 478 | .pmxops = &wmt_pinmux_ops, |
| 479 | .confops = &wmt_pinconf_ops, |
| 480 | }; |
| 481 | |
| 482 | static int wmt_gpio_request(struct gpio_chip *chip, unsigned offset) |
| 483 | { |
| 484 | return pinctrl_request_gpio(chip->base + offset); |
| 485 | } |
| 486 | |
| 487 | static void wmt_gpio_free(struct gpio_chip *chip, unsigned offset) |
| 488 | { |
| 489 | pinctrl_free_gpio(chip->base + offset); |
| 490 | } |
| 491 | |
| 492 | static int wmt_gpio_get_direction(struct gpio_chip *chip, unsigned offset) |
| 493 | { |
| 494 | struct wmt_pinctrl_data *data = dev_get_drvdata(chip->dev); |
| 495 | u32 bank = WMT_BANK_FROM_PIN(offset); |
| 496 | u32 bit = WMT_BIT_FROM_PIN(offset); |
| 497 | u32 reg_dir = data->banks[bank].reg_dir; |
| 498 | u32 val; |
| 499 | |
| 500 | val = readl_relaxed(data->base + reg_dir); |
| 501 | if (val & BIT(bit)) |
| 502 | return GPIOF_DIR_OUT; |
| 503 | else |
| 504 | return GPIOF_DIR_IN; |
| 505 | } |
| 506 | |
| 507 | static int wmt_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
| 508 | { |
| 509 | return pinctrl_gpio_direction_input(chip->base + offset); |
| 510 | } |
| 511 | |
| 512 | static int wmt_gpio_direction_output(struct gpio_chip *chip, unsigned offset, |
| 513 | int value) |
| 514 | { |
| 515 | return pinctrl_gpio_direction_output(chip->base + offset); |
| 516 | } |
| 517 | |
| 518 | static int wmt_gpio_get_value(struct gpio_chip *chip, unsigned offset) |
| 519 | { |
| 520 | struct wmt_pinctrl_data *data = dev_get_drvdata(chip->dev); |
| 521 | u32 bank = WMT_BANK_FROM_PIN(offset); |
| 522 | u32 bit = WMT_BIT_FROM_PIN(offset); |
| 523 | u32 reg_data_in = data->banks[bank].reg_data_in; |
| 524 | |
| 525 | if (reg_data_in == NO_REG) { |
| 526 | dev_err(data->dev, "no data in register defined\n"); |
| 527 | return -EINVAL; |
| 528 | } |
| 529 | |
| 530 | return !!(readl_relaxed(data->base + reg_data_in) & BIT(bit)); |
| 531 | } |
| 532 | |
| 533 | static void wmt_gpio_set_value(struct gpio_chip *chip, unsigned offset, |
| 534 | int val) |
| 535 | { |
| 536 | struct wmt_pinctrl_data *data = dev_get_drvdata(chip->dev); |
| 537 | u32 bank = WMT_BANK_FROM_PIN(offset); |
| 538 | u32 bit = WMT_BIT_FROM_PIN(offset); |
| 539 | u32 reg_data_out = data->banks[bank].reg_data_out; |
| 540 | |
| 541 | if (reg_data_out == NO_REG) { |
| 542 | dev_err(data->dev, "no data out register defined\n"); |
| 543 | return; |
| 544 | } |
| 545 | |
| 546 | if (val) |
| 547 | wmt_setbits(data, reg_data_out, BIT(bit)); |
| 548 | else |
| 549 | wmt_clearbits(data, reg_data_out, BIT(bit)); |
| 550 | } |
| 551 | |
| 552 | static struct gpio_chip wmt_gpio_chip = { |
| 553 | .label = "gpio-wmt", |
| 554 | .owner = THIS_MODULE, |
| 555 | .request = wmt_gpio_request, |
| 556 | .free = wmt_gpio_free, |
| 557 | .get_direction = wmt_gpio_get_direction, |
| 558 | .direction_input = wmt_gpio_direction_input, |
| 559 | .direction_output = wmt_gpio_direction_output, |
| 560 | .get = wmt_gpio_get_value, |
| 561 | .set = wmt_gpio_set_value, |
| 562 | .can_sleep = 0, |
| 563 | }; |
| 564 | |
| 565 | int wmt_pinctrl_probe(struct platform_device *pdev, |
| 566 | struct wmt_pinctrl_data *data) |
| 567 | { |
| 568 | int err; |
| 569 | struct resource *res; |
| 570 | |
| 571 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 572 | data->base = devm_request_and_ioremap(&pdev->dev, res); |
| 573 | if (!data->base) { |
| 574 | dev_err(&pdev->dev, "failed to map memory resource\n"); |
| 575 | return -EBUSY; |
| 576 | } |
| 577 | |
| 578 | wmt_desc.pins = data->pins; |
| 579 | wmt_desc.npins = data->npins; |
| 580 | |
| 581 | data->gpio_chip = wmt_gpio_chip; |
| 582 | data->gpio_chip.dev = &pdev->dev; |
| 583 | data->gpio_chip.of_node = pdev->dev.of_node; |
| 584 | data->gpio_chip.ngpio = data->nbanks * 32; |
| 585 | |
| 586 | platform_set_drvdata(pdev, data); |
| 587 | |
| 588 | data->dev = &pdev->dev; |
| 589 | |
| 590 | data->pctl_dev = pinctrl_register(&wmt_desc, &pdev->dev, data); |
Axel Lin | 1f1a735 | 2013-04-09 23:59:58 +0800 | [diff] [blame] | 591 | if (!data->pctl_dev) { |
Tony Prisk | 170c615 | 2013-02-20 09:32:19 +1300 | [diff] [blame] | 592 | dev_err(&pdev->dev, "Failed to register pinctrl\n"); |
| 593 | return -EINVAL; |
| 594 | } |
| 595 | |
| 596 | err = gpiochip_add(&data->gpio_chip); |
| 597 | if (err) { |
| 598 | dev_err(&pdev->dev, "could not add GPIO chip\n"); |
| 599 | goto fail_gpio; |
| 600 | } |
| 601 | |
| 602 | err = gpiochip_add_pin_range(&data->gpio_chip, dev_name(data->dev), |
| 603 | 0, 0, data->nbanks * 32); |
| 604 | if (err) |
| 605 | goto fail_range; |
| 606 | |
| 607 | dev_info(&pdev->dev, "Pin controller initialized\n"); |
| 608 | |
| 609 | return 0; |
| 610 | |
| 611 | fail_range: |
| 612 | err = gpiochip_remove(&data->gpio_chip); |
| 613 | if (err) |
| 614 | dev_err(&pdev->dev, "failed to remove gpio chip\n"); |
| 615 | fail_gpio: |
| 616 | pinctrl_unregister(data->pctl_dev); |
| 617 | return err; |
| 618 | } |
| 619 | |
| 620 | int wmt_pinctrl_remove(struct platform_device *pdev) |
| 621 | { |
| 622 | struct wmt_pinctrl_data *data = platform_get_drvdata(pdev); |
| 623 | int err; |
| 624 | |
| 625 | err = gpiochip_remove(&data->gpio_chip); |
| 626 | if (err) |
| 627 | dev_err(&pdev->dev, "failed to remove gpio chip\n"); |
| 628 | |
| 629 | pinctrl_unregister(data->pctl_dev); |
| 630 | |
| 631 | return 0; |
| 632 | } |