Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 1 | /* |
| 2 | * SuperH Pin Function Controller pinmux support. |
| 3 | * |
| 4 | * Copyright (C) 2012 Paul Mundt |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame^] | 10 | #define DRV_NAME "pinctrl-sh_pfc" |
| 11 | |
| 12 | #define pr_fmt(fmt) DRV_NAME " " KBUILD_MODNAME ": " fmt |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 13 | |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/sh_pfc.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/slab.h> |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 19 | #include <linux/spinlock.h> |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/pinctrl/consumer.h> |
| 22 | #include <linux/pinctrl/pinctrl.h> |
| 23 | #include <linux/pinctrl/pinconf.h> |
| 24 | #include <linux/pinctrl/pinmux.h> |
| 25 | #include <linux/pinctrl/pinconf-generic.h> |
| 26 | |
| 27 | struct sh_pfc_pinctrl { |
| 28 | struct pinctrl_dev *pctl; |
| 29 | struct sh_pfc *pfc; |
| 30 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 31 | struct pinmux_gpio **functions; |
| 32 | unsigned int nr_functions; |
| 33 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 34 | struct pinctrl_pin_desc *pads; |
| 35 | unsigned int nr_pads; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 36 | |
| 37 | spinlock_t lock; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 38 | }; |
| 39 | |
| 40 | static struct sh_pfc_pinctrl *sh_pfc_pmx; |
| 41 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 42 | static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 43 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 44 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 45 | |
| 46 | return pmx->nr_pads; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 47 | } |
| 48 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 49 | static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 50 | unsigned selector) |
| 51 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 52 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 53 | |
| 54 | return pmx->pads[selector].name; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, |
| 58 | const unsigned **pins, unsigned *num_pins) |
| 59 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 60 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 61 | |
| 62 | *pins = &pmx->pads[group].number; |
| 63 | *num_pins = 1; |
| 64 | |
| 65 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | static struct pinctrl_ops sh_pfc_pinctrl_ops = { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 69 | .get_groups_count = sh_pfc_get_groups_count, |
| 70 | .get_group_name = sh_pfc_get_group_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 71 | .get_group_pins = sh_pfc_get_group_pins, |
| 72 | }; |
| 73 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 74 | static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) |
| 75 | { |
| 76 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 77 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 78 | return pmx->nr_functions; |
| 79 | } |
| 80 | |
| 81 | static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, |
| 82 | unsigned selector) |
| 83 | { |
| 84 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 85 | |
| 86 | return pmx->functions[selector]->name; |
| 87 | } |
| 88 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 89 | static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func, |
| 90 | const char * const **groups, |
| 91 | unsigned * const num_groups) |
| 92 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 93 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 94 | |
| 95 | *groups = &pmx->functions[func]->name; |
| 96 | *num_groups = 1; |
| 97 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func, |
| 102 | unsigned group) |
| 103 | { |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func, |
| 108 | unsigned group) |
| 109 | { |
| 110 | } |
| 111 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 112 | static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset) |
| 113 | { |
| 114 | if (sh_pfc_config_gpio(pfc, offset, |
| 115 | PINMUX_TYPE_FUNCTION, |
| 116 | GPIO_CFG_DRYRUN) != 0) |
| 117 | return -EINVAL; |
| 118 | |
| 119 | if (sh_pfc_config_gpio(pfc, offset, |
| 120 | PINMUX_TYPE_FUNCTION, |
| 121 | GPIO_CFG_REQ) != 0) |
| 122 | return -EINVAL; |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 127 | static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 128 | struct pinctrl_gpio_range *range, |
| 129 | unsigned offset) |
| 130 | { |
| 131 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 132 | struct sh_pfc *pfc = pmx->pfc; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 133 | unsigned long flags; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 134 | int ret, pinmux_type; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 135 | |
| 136 | spin_lock_irqsave(&pfc->lock, flags); |
| 137 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 138 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 139 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 140 | switch (pinmux_type) { |
| 141 | case PINMUX_TYPE_FUNCTION: |
| 142 | pr_notice_once("Use of GPIO API for function requests is " |
| 143 | "deprecated, convert to pinctrl\n"); |
| 144 | /* handle for now */ |
| 145 | ret = sh_pfc_config_function(pfc, offset); |
| 146 | if (unlikely(ret < 0)) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 147 | goto err; |
| 148 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 149 | break; |
| 150 | case PINMUX_TYPE_GPIO: |
| 151 | break; |
| 152 | default: |
| 153 | pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type); |
| 154 | return -ENOTSUPP; |
| 155 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 156 | |
| 157 | ret = 0; |
| 158 | |
| 159 | err: |
| 160 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 161 | |
| 162 | return ret; |
| 163 | } |
| 164 | |
| 165 | static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, |
| 166 | struct pinctrl_gpio_range *range, |
| 167 | unsigned offset) |
| 168 | { |
| 169 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 170 | struct sh_pfc *pfc = pmx->pfc; |
| 171 | unsigned long flags; |
| 172 | int pinmux_type; |
| 173 | |
| 174 | spin_lock_irqsave(&pfc->lock, flags); |
| 175 | |
| 176 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
| 177 | |
| 178 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 179 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 180 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 181 | } |
| 182 | |
| 183 | static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 184 | struct pinctrl_gpio_range *range, |
| 185 | unsigned offset, bool input) |
| 186 | { |
| 187 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 188 | struct sh_pfc *pfc = pmx->pfc; |
| 189 | unsigned long flags; |
| 190 | int pinmux_type, new_pinmux_type; |
| 191 | int ret = -EINVAL; |
| 192 | |
| 193 | new_pinmux_type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; |
| 194 | |
| 195 | spin_lock_irqsave(&pfc->lock, flags); |
| 196 | |
| 197 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
| 198 | |
| 199 | switch (pinmux_type) { |
| 200 | case PINMUX_TYPE_GPIO: |
| 201 | break; |
| 202 | case PINMUX_TYPE_OUTPUT: |
| 203 | case PINMUX_TYPE_INPUT: |
| 204 | case PINMUX_TYPE_INPUT_PULLUP: |
| 205 | case PINMUX_TYPE_INPUT_PULLDOWN: |
| 206 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 207 | break; |
| 208 | default: |
| 209 | goto err; |
| 210 | } |
| 211 | |
| 212 | if (sh_pfc_config_gpio(pfc, offset, |
| 213 | new_pinmux_type, |
| 214 | GPIO_CFG_DRYRUN) != 0) |
| 215 | goto err; |
| 216 | |
| 217 | if (sh_pfc_config_gpio(pfc, offset, |
| 218 | new_pinmux_type, |
| 219 | GPIO_CFG_REQ) != 0) |
| 220 | BUG(); |
| 221 | |
| 222 | pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; |
| 223 | pfc->gpios[offset].flags |= new_pinmux_type; |
| 224 | |
| 225 | ret = 0; |
| 226 | |
| 227 | err: |
| 228 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 229 | |
| 230 | return ret; |
| 231 | } |
| 232 | |
| 233 | static struct pinmux_ops sh_pfc_pinmux_ops = { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 234 | .get_functions_count = sh_pfc_get_functions_count, |
| 235 | .get_function_name = sh_pfc_get_function_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 236 | .get_function_groups = sh_pfc_get_function_groups, |
| 237 | .enable = sh_pfc_noop_enable, |
| 238 | .disable = sh_pfc_noop_disable, |
| 239 | .gpio_request_enable = sh_pfc_gpio_request_enable, |
| 240 | .gpio_disable_free = sh_pfc_gpio_disable_free, |
| 241 | .gpio_set_direction = sh_pfc_gpio_set_direction, |
| 242 | }; |
| 243 | |
| 244 | static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
| 245 | unsigned long *config) |
| 246 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 247 | enum pin_config_param param = (enum pin_config_param)(*config); |
| 248 | |
| 249 | switch (param) { |
| 250 | default: |
| 251 | break; |
| 252 | } |
| 253 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 254 | return -ENOTSUPP; |
| 255 | } |
| 256 | |
| 257 | static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, |
| 258 | unsigned long config) |
| 259 | { |
| 260 | return -EINVAL; |
| 261 | } |
| 262 | |
| 263 | static struct pinconf_ops sh_pfc_pinconf_ops = { |
| 264 | .is_generic = true, |
| 265 | .pin_config_get = sh_pfc_pinconf_get, |
| 266 | .pin_config_set = sh_pfc_pinconf_set, |
| 267 | }; |
| 268 | |
| 269 | static struct pinctrl_gpio_range sh_pfc_gpio_range = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame^] | 270 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 271 | .id = 0, |
| 272 | }; |
| 273 | |
| 274 | static struct pinctrl_desc sh_pfc_pinctrl_desc = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame^] | 275 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 276 | .owner = THIS_MODULE, |
| 277 | .pctlops = &sh_pfc_pinctrl_ops, |
| 278 | .pmxops = &sh_pfc_pinmux_ops, |
| 279 | .confops = &sh_pfc_pinconf_ops, |
| 280 | }; |
| 281 | |
| 282 | int sh_pfc_register_pinctrl(struct sh_pfc *pfc) |
| 283 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 284 | sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 285 | if (unlikely(!sh_pfc_pmx)) |
| 286 | return -ENOMEM; |
| 287 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 288 | spin_lock_init(&sh_pfc_pmx->lock); |
| 289 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 290 | sh_pfc_pmx->pfc = pfc; |
| 291 | |
| 292 | return 0; |
| 293 | } |
Paul Mundt | 1acbbb4ed | 2012-07-17 15:21:47 +0900 | [diff] [blame] | 294 | EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 295 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 296 | static inline void __devinit sh_pfc_map_one_gpio(struct sh_pfc *pfc, |
| 297 | struct sh_pfc_pinctrl *pmx, |
| 298 | struct pinmux_gpio *gpio, |
| 299 | unsigned offset) |
| 300 | { |
| 301 | struct pinmux_data_reg *dummy; |
| 302 | unsigned long flags; |
| 303 | int bit; |
| 304 | |
| 305 | gpio->flags &= ~PINMUX_FLAG_TYPE; |
| 306 | |
| 307 | if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0) |
| 308 | gpio->flags |= PINMUX_TYPE_GPIO; |
| 309 | else { |
| 310 | gpio->flags |= PINMUX_TYPE_FUNCTION; |
| 311 | |
| 312 | spin_lock_irqsave(&pmx->lock, flags); |
| 313 | pmx->nr_functions++; |
| 314 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 315 | } |
| 316 | } |
| 317 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 318 | /* pinmux ranges -> pinctrl pin descs */ |
| 319 | static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc, |
| 320 | struct sh_pfc_pinctrl *pmx) |
| 321 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 322 | unsigned long flags; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 323 | int i; |
| 324 | |
| 325 | pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1; |
| 326 | |
| 327 | pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads, |
| 328 | GFP_KERNEL); |
| 329 | if (unlikely(!pmx->pads)) { |
| 330 | pmx->nr_pads = 0; |
| 331 | return -ENOMEM; |
| 332 | } |
| 333 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 334 | spin_lock_irqsave(&pfc->lock, flags); |
| 335 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 336 | /* |
| 337 | * We don't necessarily have a 1:1 mapping between pin and linux |
| 338 | * GPIO number, as the latter maps to the associated enum_id. |
| 339 | * Care needs to be taken to translate back to pin space when |
| 340 | * dealing with any pin configurations. |
| 341 | */ |
| 342 | for (i = 0; i < pmx->nr_pads; i++) { |
| 343 | struct pinctrl_pin_desc *pin = pmx->pads + i; |
| 344 | struct pinmux_gpio *gpio = pfc->gpios + i; |
| 345 | |
| 346 | pin->number = pfc->first_gpio + i; |
| 347 | pin->name = gpio->name; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 348 | |
Paul Mundt | e3e7945 | 2012-07-17 15:23:11 +0900 | [diff] [blame] | 349 | /* XXX */ |
| 350 | if (unlikely(!gpio->enum_id)) |
| 351 | continue; |
| 352 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 353 | sh_pfc_map_one_gpio(pfc, pmx, gpio, i); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 354 | } |
| 355 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 356 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 357 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 358 | sh_pfc_pinctrl_desc.pins = pmx->pads; |
| 359 | sh_pfc_pinctrl_desc.npins = pmx->nr_pads; |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 364 | static int __devinit sh_pfc_map_functions(struct sh_pfc *pfc, |
| 365 | struct sh_pfc_pinctrl *pmx) |
| 366 | { |
| 367 | unsigned long flags; |
| 368 | int i, fn; |
| 369 | |
| 370 | pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *), |
| 371 | GFP_KERNEL); |
| 372 | if (unlikely(!pmx->functions)) |
| 373 | return -ENOMEM; |
| 374 | |
| 375 | spin_lock_irqsave(&pmx->lock, flags); |
| 376 | |
| 377 | for (i = fn = 0; i < pmx->nr_pads; i++) { |
| 378 | struct pinmux_gpio *gpio = pfc->gpios + i; |
| 379 | |
| 380 | if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION) |
| 381 | pmx->functions[fn++] = gpio; |
| 382 | } |
| 383 | |
| 384 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 389 | static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev) |
| 390 | { |
| 391 | struct sh_pfc *pfc; |
| 392 | int ret; |
| 393 | |
| 394 | if (unlikely(!sh_pfc_pmx)) |
| 395 | return -ENODEV; |
| 396 | |
| 397 | pfc = sh_pfc_pmx->pfc; |
| 398 | |
| 399 | ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx); |
| 400 | if (unlikely(ret != 0)) |
| 401 | return ret; |
| 402 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 403 | ret = sh_pfc_map_functions(pfc, sh_pfc_pmx); |
| 404 | if (unlikely(ret != 0)) |
| 405 | goto free_pads; |
| 406 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 407 | sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev, |
| 408 | sh_pfc_pmx); |
| 409 | if (IS_ERR(sh_pfc_pmx->pctl)) { |
| 410 | ret = PTR_ERR(sh_pfc_pmx->pctl); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 411 | goto free_functions; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1; |
| 415 | sh_pfc_gpio_range.base = pfc->first_gpio; |
| 416 | sh_pfc_gpio_range.pin_base = pfc->first_gpio; |
| 417 | |
| 418 | pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range); |
| 419 | |
| 420 | platform_set_drvdata(pdev, sh_pfc_pmx); |
| 421 | |
| 422 | return 0; |
| 423 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 424 | free_functions: |
| 425 | kfree(sh_pfc_pmx->functions); |
| 426 | free_pads: |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 427 | kfree(sh_pfc_pmx->pads); |
| 428 | kfree(sh_pfc_pmx); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 429 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 430 | return ret; |
| 431 | } |
| 432 | |
| 433 | static int __devexit sh_pfc_pinctrl_remove(struct platform_device *pdev) |
| 434 | { |
| 435 | struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev); |
| 436 | |
| 437 | pinctrl_remove_gpio_range(pmx->pctl, &sh_pfc_gpio_range); |
| 438 | pinctrl_unregister(pmx->pctl); |
| 439 | |
| 440 | platform_set_drvdata(pdev, NULL); |
| 441 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 442 | kfree(sh_pfc_pmx->functions); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 443 | kfree(sh_pfc_pmx->pads); |
| 444 | kfree(sh_pfc_pmx); |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static struct platform_driver sh_pfc_pinctrl_driver = { |
| 450 | .probe = sh_pfc_pinctrl_probe, |
| 451 | .remove = __devexit_p(sh_pfc_pinctrl_remove), |
| 452 | .driver = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame^] | 453 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 454 | .owner = THIS_MODULE, |
| 455 | }, |
| 456 | }; |
| 457 | |
| 458 | static struct platform_device sh_pfc_pinctrl_device = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame^] | 459 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 460 | .id = -1, |
| 461 | }; |
| 462 | |
| 463 | static int __init sh_pfc_pinctrl_init(void) |
| 464 | { |
| 465 | int rc; |
| 466 | |
| 467 | rc = platform_driver_register(&sh_pfc_pinctrl_driver); |
| 468 | if (likely(!rc)) { |
| 469 | rc = platform_device_register(&sh_pfc_pinctrl_device); |
| 470 | if (unlikely(rc)) |
| 471 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 472 | } |
| 473 | |
| 474 | return rc; |
| 475 | } |
| 476 | |
| 477 | static void __exit sh_pfc_pinctrl_exit(void) |
| 478 | { |
| 479 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 480 | } |
| 481 | |
| 482 | subsys_initcall(sh_pfc_pinctrl_init); |
| 483 | module_exit(sh_pfc_pinctrl_exit); |