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 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 68 | static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, |
| 69 | unsigned offset) |
| 70 | { |
| 71 | seq_printf(s, "%s", DRV_NAME); |
| 72 | } |
| 73 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 74 | static struct pinctrl_ops sh_pfc_pinctrl_ops = { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 75 | .get_groups_count = sh_pfc_get_groups_count, |
| 76 | .get_group_name = sh_pfc_get_group_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 77 | .get_group_pins = sh_pfc_get_group_pins, |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 78 | .pin_dbg_show = sh_pfc_pin_dbg_show, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 79 | }; |
| 80 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 81 | static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) |
| 82 | { |
| 83 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 84 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 85 | return pmx->nr_functions; |
| 86 | } |
| 87 | |
| 88 | static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, |
| 89 | unsigned selector) |
| 90 | { |
| 91 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 92 | |
| 93 | return pmx->functions[selector]->name; |
| 94 | } |
| 95 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 96 | static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func, |
| 97 | const char * const **groups, |
| 98 | unsigned * const num_groups) |
| 99 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 100 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 101 | |
| 102 | *groups = &pmx->functions[func]->name; |
| 103 | *num_groups = 1; |
| 104 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func, |
| 109 | unsigned group) |
| 110 | { |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func, |
| 115 | unsigned group) |
| 116 | { |
| 117 | } |
| 118 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 119 | static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset) |
| 120 | { |
| 121 | if (sh_pfc_config_gpio(pfc, offset, |
| 122 | PINMUX_TYPE_FUNCTION, |
| 123 | GPIO_CFG_DRYRUN) != 0) |
| 124 | return -EINVAL; |
| 125 | |
| 126 | if (sh_pfc_config_gpio(pfc, offset, |
| 127 | PINMUX_TYPE_FUNCTION, |
| 128 | GPIO_CFG_REQ) != 0) |
| 129 | return -EINVAL; |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 134 | static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset, |
| 135 | int new_type) |
| 136 | { |
| 137 | unsigned long flags; |
| 138 | int pinmux_type; |
| 139 | int ret = -EINVAL; |
| 140 | |
| 141 | spin_lock_irqsave(&pfc->lock, flags); |
| 142 | |
| 143 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
| 144 | |
| 145 | /* |
| 146 | * See if the present config needs to first be de-configured. |
| 147 | */ |
| 148 | switch (pinmux_type) { |
| 149 | case PINMUX_TYPE_GPIO: |
| 150 | break; |
| 151 | case PINMUX_TYPE_OUTPUT: |
| 152 | case PINMUX_TYPE_INPUT: |
| 153 | case PINMUX_TYPE_INPUT_PULLUP: |
| 154 | case PINMUX_TYPE_INPUT_PULLDOWN: |
| 155 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 156 | break; |
| 157 | default: |
| 158 | goto err; |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * Dry run |
| 163 | */ |
| 164 | if (sh_pfc_config_gpio(pfc, offset, new_type, |
| 165 | GPIO_CFG_DRYRUN) != 0) |
| 166 | goto err; |
| 167 | |
| 168 | /* |
| 169 | * Request |
| 170 | */ |
| 171 | if (sh_pfc_config_gpio(pfc, offset, new_type, |
| 172 | GPIO_CFG_REQ) != 0) |
| 173 | goto err; |
| 174 | |
| 175 | pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; |
| 176 | pfc->gpios[offset].flags |= new_type; |
| 177 | |
| 178 | ret = 0; |
| 179 | |
| 180 | err: |
| 181 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 182 | |
| 183 | return ret; |
| 184 | } |
| 185 | |
| 186 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 187 | static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 188 | struct pinctrl_gpio_range *range, |
| 189 | unsigned offset) |
| 190 | { |
| 191 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 192 | struct sh_pfc *pfc = pmx->pfc; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 193 | unsigned long flags; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 194 | int ret, pinmux_type; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 195 | |
| 196 | spin_lock_irqsave(&pfc->lock, flags); |
| 197 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 198 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 199 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 200 | switch (pinmux_type) { |
| 201 | case PINMUX_TYPE_FUNCTION: |
| 202 | pr_notice_once("Use of GPIO API for function requests is " |
| 203 | "deprecated, convert to pinctrl\n"); |
| 204 | /* handle for now */ |
| 205 | ret = sh_pfc_config_function(pfc, offset); |
| 206 | if (unlikely(ret < 0)) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 207 | goto err; |
| 208 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 209 | break; |
| 210 | case PINMUX_TYPE_GPIO: |
| 211 | break; |
| 212 | default: |
| 213 | pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type); |
| 214 | return -ENOTSUPP; |
| 215 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 216 | |
| 217 | ret = 0; |
| 218 | |
| 219 | err: |
| 220 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 221 | |
| 222 | return ret; |
| 223 | } |
| 224 | |
| 225 | static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, |
| 226 | struct pinctrl_gpio_range *range, |
| 227 | unsigned offset) |
| 228 | { |
| 229 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 230 | struct sh_pfc *pfc = pmx->pfc; |
| 231 | unsigned long flags; |
| 232 | int pinmux_type; |
| 233 | |
| 234 | spin_lock_irqsave(&pfc->lock, flags); |
| 235 | |
| 236 | pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; |
| 237 | |
| 238 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 239 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 240 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 241 | } |
| 242 | |
| 243 | static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 244 | struct pinctrl_gpio_range *range, |
| 245 | unsigned offset, bool input) |
| 246 | { |
| 247 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 248 | int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 249 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 250 | return sh_pfc_reconfig_pin(pmx->pfc, offset, type); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static struct pinmux_ops sh_pfc_pinmux_ops = { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 254 | .get_functions_count = sh_pfc_get_functions_count, |
| 255 | .get_function_name = sh_pfc_get_function_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 256 | .get_function_groups = sh_pfc_get_function_groups, |
| 257 | .enable = sh_pfc_noop_enable, |
| 258 | .disable = sh_pfc_noop_disable, |
| 259 | .gpio_request_enable = sh_pfc_gpio_request_enable, |
| 260 | .gpio_disable_free = sh_pfc_gpio_disable_free, |
| 261 | .gpio_set_direction = sh_pfc_gpio_set_direction, |
| 262 | }; |
| 263 | |
| 264 | static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
| 265 | unsigned long *config) |
| 266 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 267 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 268 | struct sh_pfc *pfc = pmx->pfc; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 269 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 270 | *config = pfc->gpios[pin].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 271 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 272 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, |
| 276 | unsigned long config) |
| 277 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 278 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 279 | |
| 280 | /* Validate the new type */ |
| 281 | if (config >= PINMUX_FLAG_TYPE) |
| 282 | return -EINVAL; |
| 283 | |
| 284 | return sh_pfc_reconfig_pin(pmx->pfc, pin, config); |
| 285 | } |
| 286 | |
| 287 | static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
| 288 | struct seq_file *s, unsigned pin) |
| 289 | { |
| 290 | const char *pinmux_type_str[] = { |
| 291 | [PINMUX_TYPE_NONE] = "none", |
| 292 | [PINMUX_TYPE_FUNCTION] = "function", |
| 293 | [PINMUX_TYPE_GPIO] = "gpio", |
| 294 | [PINMUX_TYPE_OUTPUT] = "output", |
| 295 | [PINMUX_TYPE_INPUT] = "input", |
| 296 | [PINMUX_TYPE_INPUT_PULLUP] = "input bias pull up", |
| 297 | [PINMUX_TYPE_INPUT_PULLDOWN] = "input bias pull down", |
| 298 | }; |
| 299 | unsigned long config; |
| 300 | int rc; |
| 301 | |
| 302 | rc = sh_pfc_pinconf_get(pctldev, pin, &config); |
| 303 | if (unlikely(rc != 0)) |
| 304 | return; |
| 305 | |
| 306 | seq_printf(s, " %s", pinmux_type_str[config]); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | static struct pinconf_ops sh_pfc_pinconf_ops = { |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 310 | .pin_config_get = sh_pfc_pinconf_get, |
| 311 | .pin_config_set = sh_pfc_pinconf_set, |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 312 | .pin_config_dbg_show = sh_pfc_pinconf_dbg_show, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 313 | }; |
| 314 | |
| 315 | static struct pinctrl_gpio_range sh_pfc_gpio_range = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 316 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 317 | .id = 0, |
| 318 | }; |
| 319 | |
| 320 | static struct pinctrl_desc sh_pfc_pinctrl_desc = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 321 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 322 | .owner = THIS_MODULE, |
| 323 | .pctlops = &sh_pfc_pinctrl_ops, |
| 324 | .pmxops = &sh_pfc_pinmux_ops, |
| 325 | .confops = &sh_pfc_pinconf_ops, |
| 326 | }; |
| 327 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 328 | static inline void __devinit sh_pfc_map_one_gpio(struct sh_pfc *pfc, |
| 329 | struct sh_pfc_pinctrl *pmx, |
| 330 | struct pinmux_gpio *gpio, |
| 331 | unsigned offset) |
| 332 | { |
| 333 | struct pinmux_data_reg *dummy; |
| 334 | unsigned long flags; |
| 335 | int bit; |
| 336 | |
| 337 | gpio->flags &= ~PINMUX_FLAG_TYPE; |
| 338 | |
| 339 | if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0) |
| 340 | gpio->flags |= PINMUX_TYPE_GPIO; |
| 341 | else { |
| 342 | gpio->flags |= PINMUX_TYPE_FUNCTION; |
| 343 | |
| 344 | spin_lock_irqsave(&pmx->lock, flags); |
| 345 | pmx->nr_functions++; |
| 346 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 347 | } |
| 348 | } |
| 349 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 350 | /* pinmux ranges -> pinctrl pin descs */ |
| 351 | static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc, |
| 352 | struct sh_pfc_pinctrl *pmx) |
| 353 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 354 | unsigned long flags; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 355 | int i; |
| 356 | |
| 357 | pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1; |
| 358 | |
| 359 | pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads, |
| 360 | GFP_KERNEL); |
| 361 | if (unlikely(!pmx->pads)) { |
| 362 | pmx->nr_pads = 0; |
| 363 | return -ENOMEM; |
| 364 | } |
| 365 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 366 | spin_lock_irqsave(&pfc->lock, flags); |
| 367 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 368 | /* |
| 369 | * We don't necessarily have a 1:1 mapping between pin and linux |
| 370 | * GPIO number, as the latter maps to the associated enum_id. |
| 371 | * Care needs to be taken to translate back to pin space when |
| 372 | * dealing with any pin configurations. |
| 373 | */ |
| 374 | for (i = 0; i < pmx->nr_pads; i++) { |
| 375 | struct pinctrl_pin_desc *pin = pmx->pads + i; |
| 376 | struct pinmux_gpio *gpio = pfc->gpios + i; |
| 377 | |
| 378 | pin->number = pfc->first_gpio + i; |
| 379 | pin->name = gpio->name; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 380 | |
Paul Mundt | e3e7945 | 2012-07-17 15:23:11 +0900 | [diff] [blame] | 381 | /* XXX */ |
| 382 | if (unlikely(!gpio->enum_id)) |
| 383 | continue; |
| 384 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 385 | sh_pfc_map_one_gpio(pfc, pmx, gpio, i); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 386 | } |
| 387 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 388 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 389 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 390 | sh_pfc_pinctrl_desc.pins = pmx->pads; |
| 391 | sh_pfc_pinctrl_desc.npins = pmx->nr_pads; |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 396 | static int __devinit sh_pfc_map_functions(struct sh_pfc *pfc, |
| 397 | struct sh_pfc_pinctrl *pmx) |
| 398 | { |
| 399 | unsigned long flags; |
| 400 | int i, fn; |
| 401 | |
| 402 | pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *), |
| 403 | GFP_KERNEL); |
| 404 | if (unlikely(!pmx->functions)) |
| 405 | return -ENOMEM; |
| 406 | |
| 407 | spin_lock_irqsave(&pmx->lock, flags); |
| 408 | |
| 409 | for (i = fn = 0; i < pmx->nr_pads; i++) { |
| 410 | struct pinmux_gpio *gpio = pfc->gpios + i; |
| 411 | |
| 412 | if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION) |
| 413 | pmx->functions[fn++] = gpio; |
| 414 | } |
| 415 | |
| 416 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 417 | |
| 418 | return 0; |
| 419 | } |
| 420 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 421 | static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev) |
| 422 | { |
| 423 | struct sh_pfc *pfc; |
| 424 | int ret; |
| 425 | |
| 426 | if (unlikely(!sh_pfc_pmx)) |
| 427 | return -ENODEV; |
| 428 | |
| 429 | pfc = sh_pfc_pmx->pfc; |
| 430 | |
| 431 | ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx); |
| 432 | if (unlikely(ret != 0)) |
| 433 | return ret; |
| 434 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 435 | ret = sh_pfc_map_functions(pfc, sh_pfc_pmx); |
| 436 | if (unlikely(ret != 0)) |
| 437 | goto free_pads; |
| 438 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 439 | sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev, |
| 440 | sh_pfc_pmx); |
| 441 | if (IS_ERR(sh_pfc_pmx->pctl)) { |
| 442 | ret = PTR_ERR(sh_pfc_pmx->pctl); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 443 | goto free_functions; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1; |
| 447 | sh_pfc_gpio_range.base = pfc->first_gpio; |
| 448 | sh_pfc_gpio_range.pin_base = pfc->first_gpio; |
| 449 | |
| 450 | pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range); |
| 451 | |
| 452 | platform_set_drvdata(pdev, sh_pfc_pmx); |
| 453 | |
| 454 | return 0; |
| 455 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 456 | free_functions: |
| 457 | kfree(sh_pfc_pmx->functions); |
| 458 | free_pads: |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 459 | kfree(sh_pfc_pmx->pads); |
| 460 | kfree(sh_pfc_pmx); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 461 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 462 | return ret; |
| 463 | } |
| 464 | |
| 465 | static int __devexit sh_pfc_pinctrl_remove(struct platform_device *pdev) |
| 466 | { |
| 467 | struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev); |
| 468 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 469 | pinctrl_unregister(pmx->pctl); |
| 470 | |
| 471 | platform_set_drvdata(pdev, NULL); |
| 472 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 473 | kfree(sh_pfc_pmx->functions); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 474 | kfree(sh_pfc_pmx->pads); |
| 475 | kfree(sh_pfc_pmx); |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static struct platform_driver sh_pfc_pinctrl_driver = { |
| 481 | .probe = sh_pfc_pinctrl_probe, |
| 482 | .remove = __devexit_p(sh_pfc_pinctrl_remove), |
| 483 | .driver = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 484 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 485 | .owner = THIS_MODULE, |
| 486 | }, |
| 487 | }; |
| 488 | |
| 489 | static struct platform_device sh_pfc_pinctrl_device = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 490 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 491 | .id = -1, |
| 492 | }; |
| 493 | |
Paul Mundt | 1e32dfe | 2012-08-01 16:27:38 +0900 | [diff] [blame] | 494 | static int sh_pfc_pinctrl_init(void) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 495 | { |
| 496 | int rc; |
| 497 | |
| 498 | rc = platform_driver_register(&sh_pfc_pinctrl_driver); |
| 499 | if (likely(!rc)) { |
| 500 | rc = platform_device_register(&sh_pfc_pinctrl_device); |
| 501 | if (unlikely(rc)) |
| 502 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 503 | } |
| 504 | |
| 505 | return rc; |
| 506 | } |
| 507 | |
Paul Mundt | 1e32dfe | 2012-08-01 16:27:38 +0900 | [diff] [blame] | 508 | int sh_pfc_register_pinctrl(struct sh_pfc *pfc) |
| 509 | { |
| 510 | sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); |
| 511 | if (unlikely(!sh_pfc_pmx)) |
| 512 | return -ENOMEM; |
| 513 | |
| 514 | spin_lock_init(&sh_pfc_pmx->lock); |
| 515 | |
| 516 | sh_pfc_pmx->pfc = pfc; |
| 517 | |
| 518 | return sh_pfc_pinctrl_init(); |
| 519 | } |
| 520 | EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl); |
| 521 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 522 | static void __exit sh_pfc_pinctrl_exit(void) |
| 523 | { |
| 524 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 525 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 526 | module_exit(sh_pfc_pinctrl_exit); |