Blame view
drivers/gpio/gpio-u300.c
24.5 KB
bd41b99d4 [ARM] 5471/2: U30... |
1 |
/* |
c103de240 gpio: reorganize ... |
2 |
* U300 GPIO module. |
bd41b99d4 [ARM] 5471/2: U30... |
3 |
* |
cc890cd78 ARM: 7083/1: rewr... |
4 |
* Copyright (C) 2007-2011 ST-Ericsson AB |
bd41b99d4 [ARM] 5471/2: U30... |
5 |
* License terms: GNU General Public License (GPL) version 2 |
bd41b99d4 [ARM] 5471/2: U30... |
6 7 8 9 |
* This can driver either of the two basic GPIO cores * available in the U300 platforms: * COH 901 335 - Used in DB3150 (U300 1.0) and DB3200 (U330 1.0) * COH 901 571/3 - Used in DB3210 (U365 2.0) and DB3350 (U335 1.0) |
cc890cd78 ARM: 7083/1: rewr... |
10 |
* Author: Linus Walleij <linus.walleij@linaro.org> |
bd41b99d4 [ARM] 5471/2: U30... |
11 |
* Author: Jonas Aaberg <jonas.aberg@stericsson.com> |
bd41b99d4 [ARM] 5471/2: U30... |
12 13 |
*/ #include <linux/module.h> |
cc890cd78 ARM: 7083/1: rewr... |
14 |
#include <linux/irq.h> |
bd41b99d4 [ARM] 5471/2: U30... |
15 16 17 18 19 20 21 22 |
#include <linux/interrupt.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/gpio.h> |
cc890cd78 ARM: 7083/1: rewr... |
23 24 |
#include <linux/list.h> #include <linux/slab.h> |
eb3cf18cc ARM: 7033/1: mach... |
25 |
#include <mach/gpio-u300.h> |
bd41b99d4 [ARM] 5471/2: U30... |
26 |
|
cc890cd78 ARM: 7083/1: rewr... |
27 28 29 30 31 32 33 34 35 36 37 38 |
/* * Bias modes for U300 GPIOs * * GPIO_U300_CONFIG_BIAS_UNKNOWN: this bias mode is not known to us * GPIO_U300_CONFIG_BIAS_FLOAT: no specific bias, the GPIO will float or state * is not controlled by software * GPIO_U300_CONFIG_BIAS_PULL_UP: the GPIO will be pulled up (usually with high * impedance to VDD) */ #define GPIO_U300_CONFIG_BIAS_UNKNOWN 0x1000 #define GPIO_U300_CONFIG_BIAS_FLOAT 0x1001 #define GPIO_U300_CONFIG_BIAS_PULL_UP 0x1002 |
bd41b99d4 [ARM] 5471/2: U30... |
39 |
|
cc890cd78 ARM: 7083/1: rewr... |
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 |
/* * Drive modes for U300 GPIOs (output) * * GPIO_U300_CONFIG_DRIVE_PUSH_PULL: the GPIO will be driven actively high and * low, this is the most typical case and is typically achieved with two * active transistors on the output * GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: the GPIO will be driven with open drain * (open collector) which means it is usually wired with other output * ports which are then pulled up with an external resistor * GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: the GPIO will be driven with open drain * (open emitter) which is the same as open drain mutatis mutandis but * pulled to ground */ #define GPIO_U300_CONFIG_DRIVE_PUSH_PULL 0x2000 #define GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN 0x2001 #define GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE 0x2002 /* * Register definitions for COH 901 335 variant */ #define U300_335_PORT_STRIDE (0x1C) /* Port X Pin Data Register 32bit, this is both input and output (R/W) */ #define U300_335_PXPDIR (0x00) #define U300_335_PXPDOR (0x00) /* Port X Pin Config Register 32bit (R/W) */ #define U300_335_PXPCR (0x04) /* This register layout is the same in both blocks */ #define U300_GPIO_PXPCR_ALL_PINS_MODE_MASK (0x0000FFFFUL) #define U300_GPIO_PXPCR_PIN_MODE_MASK (0x00000003UL) #define U300_GPIO_PXPCR_PIN_MODE_SHIFT (0x00000002UL) #define U300_GPIO_PXPCR_PIN_MODE_INPUT (0x00000000UL) #define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL (0x00000001UL) #define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN (0x00000002UL) #define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE (0x00000003UL) /* Port X Interrupt Event Register 32bit (R/W) */ #define U300_335_PXIEV (0x08) /* Port X Interrupt Enable Register 32bit (R/W) */ #define U300_335_PXIEN (0x0C) /* Port X Interrupt Force Register 32bit (R/W) */ #define U300_335_PXIFR (0x10) /* Port X Interrupt Config Register 32bit (R/W) */ #define U300_335_PXICR (0x14) /* This register layout is the same in both blocks */ #define U300_GPIO_PXICR_ALL_IRQ_CONFIG_MASK (0x000000FFUL) #define U300_GPIO_PXICR_IRQ_CONFIG_MASK (0x00000001UL) #define U300_GPIO_PXICR_IRQ_CONFIG_FALLING_EDGE (0x00000000UL) #define U300_GPIO_PXICR_IRQ_CONFIG_RISING_EDGE (0x00000001UL) /* Port X Pull-up Enable Register 32bit (R/W) */ #define U300_335_PXPER (0x18) /* This register layout is the same in both blocks */ #define U300_GPIO_PXPER_ALL_PULL_UP_DISABLE_MASK (0x000000FFUL) #define U300_GPIO_PXPER_PULL_UP_DISABLE (0x00000001UL) /* Control Register 32bit (R/W) */ #define U300_335_CR (0x54) #define U300_335_CR_BLOCK_CLOCK_ENABLE (0x00000001UL) /* * Register definitions for COH 901 571 / 3 variant */ #define U300_571_PORT_STRIDE (0x30) /* * Control Register 32bit (R/W) * bit 15-9 (mask 0x0000FE00) contains the number of cores. 8*cores * gives the number of GPIO pins. * bit 8-2 (mask 0x000001FC) contains the core version ID. */ #define U300_571_CR (0x00) #define U300_571_CR_SYNC_SEL_ENABLE (0x00000002UL) #define U300_571_CR_BLOCK_CLKRQ_ENABLE (0x00000001UL) /* * These registers have the same layout and function as the corresponding * COH 901 335 registers, just at different offset. */ #define U300_571_PXPDIR (0x04) #define U300_571_PXPDOR (0x08) #define U300_571_PXPCR (0x0C) #define U300_571_PXPER (0x10) #define U300_571_PXIEV (0x14) #define U300_571_PXIEN (0x18) #define U300_571_PXIFR (0x1C) #define U300_571_PXICR (0x20) /* 8 bits per port, no version has more than 7 ports */ #define U300_GPIO_PINS_PER_PORT 8 #define U300_GPIO_MAX (U300_GPIO_PINS_PER_PORT * 7) struct u300_gpio { struct gpio_chip chip; struct list_head port_list; struct clk *clk; struct resource *memres; void __iomem *base; struct device *dev; int irq_base; u32 stride; /* Register offsets */ u32 pcr; u32 dor; u32 dir; u32 per; u32 icr; u32 ien; u32 iev; }; |
bd41b99d4 [ARM] 5471/2: U30... |
144 145 |
struct u300_gpio_port { |
cc890cd78 ARM: 7083/1: rewr... |
146 147 148 |
struct list_head node; struct u300_gpio *gpio; char name[8]; |
bd41b99d4 [ARM] 5471/2: U30... |
149 150 |
int irq; int number; |
cc890cd78 ARM: 7083/1: rewr... |
151 |
u8 toggle_edge_mode; |
bd41b99d4 [ARM] 5471/2: U30... |
152 |
}; |
cc890cd78 ARM: 7083/1: rewr... |
153 154 155 156 157 158 159 160 161 |
/* * Macro to expand to read a specific register found in the "gpio" * struct. It requires the struct u300_gpio *gpio variable to exist in * its context. It calculates the port offset from the given pin * offset, muliplies by the port stride and adds the register offset * so it provides a pointer to the desired register. */ #define U300_PIN_REG(pin, reg) \ (gpio->base + (pin >> 3) * gpio->stride + gpio->reg) |
bd41b99d4 [ARM] 5471/2: U30... |
162 |
|
cc890cd78 ARM: 7083/1: rewr... |
163 164 165 166 167 168 |
/* * Provides a bitmask for a specific gpio pin inside an 8-bit GPIO * register. */ #define U300_PIN_BIT(pin) \ (1 << (pin & 0x07)) |
bd41b99d4 [ARM] 5471/2: U30... |
169 |
|
cc890cd78 ARM: 7083/1: rewr... |
170 171 172 173 |
struct u300_gpio_confdata { u16 bias_mode; bool output; int outval; |
bd41b99d4 [ARM] 5471/2: U30... |
174 |
}; |
cc890cd78 ARM: 7083/1: rewr... |
175 176 177 178 |
/* BS335 has seven ports of 8 bits each = GPIO pins 0..55 */ #define BS335_GPIO_NUM_PORTS 7 /* BS365 has five ports of 8 bits each = GPIO pins 0..39 */ #define BS365_GPIO_NUM_PORTS 5 |
bd41b99d4 [ARM] 5471/2: U30... |
179 |
|
cc890cd78 ARM: 7083/1: rewr... |
180 181 182 183 |
#define U300_FLOATING_INPUT { \ .bias_mode = GPIO_U300_CONFIG_BIAS_FLOAT, \ .output = false, \ } |
bd41b99d4 [ARM] 5471/2: U30... |
184 |
|
cc890cd78 ARM: 7083/1: rewr... |
185 186 187 188 |
#define U300_PULL_UP_INPUT { \ .bias_mode = GPIO_U300_CONFIG_BIAS_PULL_UP, \ .output = false, \ } |
bd41b99d4 [ARM] 5471/2: U30... |
189 |
|
cc890cd78 ARM: 7083/1: rewr... |
190 191 192 193 |
#define U300_OUTPUT_LOW { \ .output = true, \ .outval = 0, \ } |
bd41b99d4 [ARM] 5471/2: U30... |
194 |
|
cc890cd78 ARM: 7083/1: rewr... |
195 196 197 198 |
#define U300_OUTPUT_HIGH { \ .output = true, \ .outval = 1, \ } |
bd41b99d4 [ARM] 5471/2: U30... |
199 |
|
bd41b99d4 [ARM] 5471/2: U30... |
200 201 |
/* Initial configuration */ |
cc890cd78 ARM: 7083/1: rewr... |
202 203 |
static const struct __initdata u300_gpio_confdata bs335_gpio_config[BS335_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = { |
bd41b99d4 [ARM] 5471/2: U30... |
204 205 |
/* Port 0, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
206 207 208 209 210 211 212 213 |
U300_FLOATING_INPUT, U300_OUTPUT_HIGH, U300_FLOATING_INPUT, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, |
bd41b99d4 [ARM] 5471/2: U30... |
214 215 216 |
}, /* Port 1, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
217 218 219 220 221 222 223 224 |
U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_PULL_UP_INPUT, U300_FLOATING_INPUT, U300_OUTPUT_HIGH, U300_OUTPUT_LOW, U300_OUTPUT_LOW, |
bd41b99d4 [ARM] 5471/2: U30... |
225 226 227 |
}, /* Port 2, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
228 229 230 231 232 233 234 235 |
U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_OUTPUT_LOW, U300_PULL_UP_INPUT, U300_OUTPUT_LOW, U300_PULL_UP_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
236 237 238 |
}, /* Port 3, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
239 240 241 242 243 244 245 246 |
U300_PULL_UP_INPUT, U300_OUTPUT_LOW, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
247 248 249 |
}, /* Port 4, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
250 251 252 253 254 255 256 257 |
U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
258 259 260 |
}, /* Port 5, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
261 262 263 264 265 266 267 268 |
U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
269 270 271 |
}, /* Port 6, pind 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
272 273 274 275 276 277 278 279 |
U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_FLOATING_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
280 |
} |
cc890cd78 ARM: 7083/1: rewr... |
281 |
}; |
bd41b99d4 [ARM] 5471/2: U30... |
282 |
|
cc890cd78 ARM: 7083/1: rewr... |
283 284 |
static const struct __initdata u300_gpio_confdata bs365_gpio_config[BS365_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = { |
bd41b99d4 [ARM] 5471/2: U30... |
285 286 |
/* Port 0, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
287 288 289 290 291 292 293 294 |
U300_FLOATING_INPUT, U300_OUTPUT_LOW, U300_FLOATING_INPUT, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_PULL_UP_INPUT, U300_FLOATING_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
295 296 297 |
}, /* Port 1, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
298 299 300 301 302 303 304 305 |
U300_OUTPUT_LOW, U300_FLOATING_INPUT, U300_OUTPUT_LOW, U300_FLOATING_INPUT, U300_FLOATING_INPUT, U300_OUTPUT_HIGH, U300_OUTPUT_LOW, U300_OUTPUT_LOW, |
bd41b99d4 [ARM] 5471/2: U30... |
306 307 308 |
}, /* Port 2, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
309 310 311 312 313 314 315 316 |
U300_FLOATING_INPUT, U300_PULL_UP_INPUT, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
317 318 319 |
}, /* Port 3, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
320 321 322 323 324 325 326 327 |
U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
328 329 330 |
}, /* Port 4, pins 0-7 */ { |
cc890cd78 ARM: 7083/1: rewr... |
331 332 333 334 |
U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, U300_PULL_UP_INPUT, |
bd41b99d4 [ARM] 5471/2: U30... |
335 |
/* These 4 pins doesn't exist on DB3210 */ |
cc890cd78 ARM: 7083/1: rewr... |
336 337 338 339 |
U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, U300_OUTPUT_LOW, |
bd41b99d4 [ARM] 5471/2: U30... |
340 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
341 |
}; |
bd41b99d4 [ARM] 5471/2: U30... |
342 |
|
cc890cd78 ARM: 7083/1: rewr... |
343 344 345 |
/** * to_u300_gpio() - get the pointer to u300_gpio * @chip: the gpio chip member of the structure u300_gpio |
bd41b99d4 [ARM] 5471/2: U30... |
346 |
*/ |
cc890cd78 ARM: 7083/1: rewr... |
347 |
static inline struct u300_gpio *to_u300_gpio(struct gpio_chip *chip) |
bd41b99d4 [ARM] 5471/2: U30... |
348 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
349 |
return container_of(chip, struct u300_gpio, chip); |
bd41b99d4 [ARM] 5471/2: U30... |
350 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
351 |
|
cc890cd78 ARM: 7083/1: rewr... |
352 |
static int u300_gpio_get(struct gpio_chip *chip, unsigned offset) |
bd41b99d4 [ARM] 5471/2: U30... |
353 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
354 |
struct u300_gpio *gpio = to_u300_gpio(chip); |
bd41b99d4 [ARM] 5471/2: U30... |
355 |
|
cc890cd78 ARM: 7083/1: rewr... |
356 |
return readl(U300_PIN_REG(offset, dir)) & U300_PIN_BIT(offset); |
bd41b99d4 [ARM] 5471/2: U30... |
357 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
358 |
|
cc890cd78 ARM: 7083/1: rewr... |
359 |
static void u300_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
ee17962e2 ARM: 5731/2: Fix ... |
360 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
361 362 363 |
struct u300_gpio *gpio = to_u300_gpio(chip); unsigned long flags; u32 val; |
ee17962e2 ARM: 5731/2: Fix ... |
364 |
|
cc890cd78 ARM: 7083/1: rewr... |
365 |
local_irq_save(flags); |
bd41b99d4 [ARM] 5471/2: U30... |
366 |
|
cc890cd78 ARM: 7083/1: rewr... |
367 368 369 370 371 |
val = readl(U300_PIN_REG(offset, dor)); if (value) writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, dor)); else writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, dor)); |
bd41b99d4 [ARM] 5471/2: U30... |
372 |
|
cc890cd78 ARM: 7083/1: rewr... |
373 |
local_irq_restore(flags); |
bd41b99d4 [ARM] 5471/2: U30... |
374 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
375 |
|
cc890cd78 ARM: 7083/1: rewr... |
376 |
static int u300_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
bd41b99d4 [ARM] 5471/2: U30... |
377 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
378 379 380 |
struct u300_gpio *gpio = to_u300_gpio(chip); unsigned long flags; u32 val; |
bd41b99d4 [ARM] 5471/2: U30... |
381 |
|
cc890cd78 ARM: 7083/1: rewr... |
382 383 384 385 386 387 388 |
local_irq_save(flags); val = readl(U300_PIN_REG(offset, pcr)); /* Mask out this pin, note 2 bits per setting */ val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); writel(val, U300_PIN_REG(offset, pcr)); local_irq_restore(flags); return 0; |
bd41b99d4 [ARM] 5471/2: U30... |
389 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
390 |
|
cc890cd78 ARM: 7083/1: rewr... |
391 392 |
static int u300_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) |
bd41b99d4 [ARM] 5471/2: U30... |
393 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
394 |
struct u300_gpio *gpio = to_u300_gpio(chip); |
bd41b99d4 [ARM] 5471/2: U30... |
395 |
unsigned long flags; |
cc890cd78 ARM: 7083/1: rewr... |
396 397 |
u32 oldmode; u32 val; |
bd41b99d4 [ARM] 5471/2: U30... |
398 399 |
local_irq_save(flags); |
cc890cd78 ARM: 7083/1: rewr... |
400 401 402 403 404 405 406 407 408 409 410 411 412 413 |
val = readl(U300_PIN_REG(offset, pcr)); /* * Drive mode must be set by the special mode set function, set * push/pull mode by default if no mode has been selected. */ oldmode = val & (U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); /* mode = 0 means input, else some mode is already set */ if (oldmode == 0) { val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL << ((offset & 0x07) << 1)); writel(val, U300_PIN_REG(offset, pcr)); |
bd41b99d4 [ARM] 5471/2: U30... |
414 |
} |
cc890cd78 ARM: 7083/1: rewr... |
415 |
u300_gpio_set(chip, offset, value); |
bd41b99d4 [ARM] 5471/2: U30... |
416 |
local_irq_restore(flags); |
cc890cd78 ARM: 7083/1: rewr... |
417 |
return 0; |
bd41b99d4 [ARM] 5471/2: U30... |
418 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
419 |
|
cc890cd78 ARM: 7083/1: rewr... |
420 |
static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
bd41b99d4 [ARM] 5471/2: U30... |
421 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
422 423 424 425 426 427 428 429 430 431 432 433 434 |
struct u300_gpio *gpio = to_u300_gpio(chip); int retirq = gpio->irq_base + offset; dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d ", offset, retirq); return retirq; } static int u300_gpio_config(struct gpio_chip *chip, unsigned offset, u16 param, unsigned long *data) { struct u300_gpio *gpio = to_u300_gpio(chip); |
bd41b99d4 [ARM] 5471/2: U30... |
435 436 |
unsigned long flags; u32 val; |
bd41b99d4 [ARM] 5471/2: U30... |
437 |
local_irq_save(flags); |
cc890cd78 ARM: 7083/1: rewr... |
438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 |
switch (param) { case GPIO_U300_CONFIG_BIAS_UNKNOWN: case GPIO_U300_CONFIG_BIAS_FLOAT: val = readl(U300_PIN_REG(offset, per)); writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, per)); break; case GPIO_U300_CONFIG_BIAS_PULL_UP: val = readl(U300_PIN_REG(offset, per)); writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, per)); break; case GPIO_U300_CONFIG_DRIVE_PUSH_PULL: val = readl(U300_PIN_REG(offset, pcr)); val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL << ((offset & 0x07) << 1)); writel(val, U300_PIN_REG(offset, pcr)); break; case GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: val = readl(U300_PIN_REG(offset, pcr)); val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN << ((offset & 0x07) << 1)); writel(val, U300_PIN_REG(offset, pcr)); break; case GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: val = readl(U300_PIN_REG(offset, pcr)); val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1)); val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE << ((offset & 0x07) << 1)); writel(val, U300_PIN_REG(offset, pcr)); break; default: local_irq_restore(flags); dev_err(gpio->dev, "illegal configuration requested "); return -EINVAL; } |
bd41b99d4 [ARM] 5471/2: U30... |
478 479 480 |
local_irq_restore(flags); return 0; } |
bd41b99d4 [ARM] 5471/2: U30... |
481 |
|
cc890cd78 ARM: 7083/1: rewr... |
482 483 484 485 486 487 488 489 490 491 492 |
static struct gpio_chip u300_gpio_chip = { .label = "u300-gpio-chip", .owner = THIS_MODULE, .get = u300_gpio_get, .set = u300_gpio_set, .direction_input = u300_gpio_direction_input, .direction_output = u300_gpio_direction_output, .to_irq = u300_gpio_to_irq, }; static void u300_toggle_trigger(struct u300_gpio *gpio, unsigned offset) |
bd41b99d4 [ARM] 5471/2: U30... |
493 |
{ |
bd41b99d4 [ARM] 5471/2: U30... |
494 |
u32 val; |
cc890cd78 ARM: 7083/1: rewr... |
495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 |
val = readl(U300_PIN_REG(offset, icr)); /* Set mode depending on state */ if (u300_gpio_get(&gpio->chip, offset)) { /* High now, let's trigger on falling edge next then */ writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); dev_dbg(gpio->dev, "next IRQ on falling edge on pin %d ", offset); } else { /* Low now, let's trigger on rising edge next then */ writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); dev_dbg(gpio->dev, "next IRQ on rising edge on pin %d ", offset); } |
bd41b99d4 [ARM] 5471/2: U30... |
510 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
511 |
|
cc890cd78 ARM: 7083/1: rewr... |
512 |
static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger) |
bd41b99d4 [ARM] 5471/2: U30... |
513 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
514 515 516 |
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); struct u300_gpio *gpio = port->gpio; int offset = d->irq - gpio->irq_base; |
bd41b99d4 [ARM] 5471/2: U30... |
517 |
u32 val; |
bd41b99d4 [ARM] 5471/2: U30... |
518 |
|
cc890cd78 ARM: 7083/1: rewr... |
519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 |
if ((trigger & IRQF_TRIGGER_RISING) && (trigger & IRQF_TRIGGER_FALLING)) { /* * The GPIO block can only trigger on falling OR rising edges, * not both. So we need to toggle the mode whenever the pin * goes from one state to the other with a special state flag */ dev_dbg(gpio->dev, "trigger on both rising and falling edge on pin %d ", offset); port->toggle_edge_mode |= U300_PIN_BIT(offset); u300_toggle_trigger(gpio, offset); } else if (trigger & IRQF_TRIGGER_RISING) { dev_dbg(gpio->dev, "trigger on rising edge on pin %d ", offset); val = readl(U300_PIN_REG(offset, icr)); writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); port->toggle_edge_mode &= ~U300_PIN_BIT(offset); } else if (trigger & IRQF_TRIGGER_FALLING) { dev_dbg(gpio->dev, "trigger on falling edge on pin %d ", offset); val = readl(U300_PIN_REG(offset, icr)); writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr)); port->toggle_edge_mode &= ~U300_PIN_BIT(offset); } return 0; |
bd41b99d4 [ARM] 5471/2: U30... |
549 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
550 |
|
cc890cd78 ARM: 7083/1: rewr... |
551 |
static void u300_gpio_irq_enable(struct irq_data *d) |
bd41b99d4 [ARM] 5471/2: U30... |
552 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
553 554 555 |
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); struct u300_gpio *gpio = port->gpio; int offset = d->irq - gpio->irq_base; |
bd41b99d4 [ARM] 5471/2: U30... |
556 557 558 559 |
u32 val; unsigned long flags; local_irq_save(flags); |
cc890cd78 ARM: 7083/1: rewr... |
560 561 |
val = readl(U300_PIN_REG(offset, ien)); writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, ien)); |
bd41b99d4 [ARM] 5471/2: U30... |
562 563 |
local_irq_restore(flags); } |
bd41b99d4 [ARM] 5471/2: U30... |
564 |
|
cc890cd78 ARM: 7083/1: rewr... |
565 |
static void u300_gpio_irq_disable(struct irq_data *d) |
bd41b99d4 [ARM] 5471/2: U30... |
566 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
567 568 569 |
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); struct u300_gpio *gpio = port->gpio; int offset = d->irq - gpio->irq_base; |
bd41b99d4 [ARM] 5471/2: U30... |
570 571 572 573 |
u32 val; unsigned long flags; local_irq_save(flags); |
cc890cd78 ARM: 7083/1: rewr... |
574 575 |
val = readl(U300_PIN_REG(offset, ien)); writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, ien)); |
bd41b99d4 [ARM] 5471/2: U30... |
576 577 |
local_irq_restore(flags); } |
bd41b99d4 [ARM] 5471/2: U30... |
578 |
|
cc890cd78 ARM: 7083/1: rewr... |
579 580 581 582 583 584 585 586 587 |
static struct irq_chip u300_gpio_irqchip = { .name = "u300-gpio-irqchip", .irq_enable = u300_gpio_irq_enable, .irq_disable = u300_gpio_irq_disable, .irq_set_type = u300_gpio_irq_type, }; static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc) |
bd41b99d4 [ARM] 5471/2: U30... |
588 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
589 590 591 592 |
struct u300_gpio_port *port = irq_get_handler_data(irq); struct u300_gpio *gpio = port->gpio; int pinoffset = port->number << 3; /* get the right stride */ unsigned long val; |
bd41b99d4 [ARM] 5471/2: U30... |
593 |
|
cc890cd78 ARM: 7083/1: rewr... |
594 |
desc->irq_data.chip->irq_ack(&desc->irq_data); |
bd41b99d4 [ARM] 5471/2: U30... |
595 |
/* Read event register */ |
cc890cd78 ARM: 7083/1: rewr... |
596 |
val = readl(U300_PIN_REG(pinoffset, iev)); |
bd41b99d4 [ARM] 5471/2: U30... |
597 |
/* Mask relevant bits */ |
cc890cd78 ARM: 7083/1: rewr... |
598 |
val &= 0xFFU; /* 8 bits per port */ |
bd41b99d4 [ARM] 5471/2: U30... |
599 |
/* ACK IRQ (clear event) */ |
cc890cd78 ARM: 7083/1: rewr... |
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 |
writel(val, U300_PIN_REG(pinoffset, iev)); /* Call IRQ handler */ if (val != 0) { int irqoffset; for_each_set_bit(irqoffset, &val, U300_GPIO_PINS_PER_PORT) { int pin_irq = gpio->irq_base + (port->number << 3) + irqoffset; int offset = pinoffset + irqoffset; dev_dbg(gpio->dev, "GPIO IRQ %d on pin %d ", pin_irq, offset); generic_handle_irq(pin_irq); /* * Triggering IRQ on both rising and falling edge * needs mockery */ if (port->toggle_edge_mode & U300_PIN_BIT(offset)) u300_toggle_trigger(gpio, offset); } |
bd41b99d4 [ARM] 5471/2: U30... |
622 |
} |
cc890cd78 ARM: 7083/1: rewr... |
623 624 |
desc->irq_data.chip->irq_unmask(&desc->irq_data); |
bd41b99d4 [ARM] 5471/2: U30... |
625 |
} |
cc890cd78 ARM: 7083/1: rewr... |
626 627 628 |
static void __init u300_gpio_init_pin(struct u300_gpio *gpio, int offset, const struct u300_gpio_confdata *conf) |
bd41b99d4 [ARM] 5471/2: U30... |
629 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
630 631 632 |
/* Set mode: input or output */ if (conf->output) { u300_gpio_direction_output(&gpio->chip, offset, conf->outval); |
bd41b99d4 [ARM] 5471/2: U30... |
633 |
|
cc890cd78 ARM: 7083/1: rewr... |
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 |
/* Deactivate bias mode for output */ u300_gpio_config(&gpio->chip, offset, GPIO_U300_CONFIG_BIAS_FLOAT, NULL); /* Set drive mode for output */ u300_gpio_config(&gpio->chip, offset, GPIO_U300_CONFIG_DRIVE_PUSH_PULL, NULL); dev_dbg(gpio->dev, "set up pin %d as output, value: %d ", offset, conf->outval); } else { u300_gpio_direction_input(&gpio->chip, offset); /* Always set output low on input pins */ u300_gpio_set(&gpio->chip, offset, 0); /* Set bias mode for input */ u300_gpio_config(&gpio->chip, offset, conf->bias_mode, NULL); dev_dbg(gpio->dev, "set up pin %d as input, bias: %04x ", offset, conf->bias_mode); |
bd41b99d4 [ARM] 5471/2: U30... |
658 |
} |
cc890cd78 ARM: 7083/1: rewr... |
659 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
660 |
|
cc890cd78 ARM: 7083/1: rewr... |
661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 |
static void __init u300_gpio_init_coh901571(struct u300_gpio *gpio, struct u300_gpio_platform *plat) { int i, j; /* Write default config and values to all pins */ for (i = 0; i < plat->ports; i++) { for (j = 0; j < 8; j++) { const struct u300_gpio_confdata *conf; int offset = (i*8) + j; if (plat->variant == U300_GPIO_COH901571_3_BS335) conf = &bs335_gpio_config[i][j]; else if (plat->variant == U300_GPIO_COH901571_3_BS365) conf = &bs365_gpio_config[i][j]; else break; u300_gpio_init_pin(gpio, offset, conf); |
bd41b99d4 [ARM] 5471/2: U30... |
680 681 |
} } |
cc890cd78 ARM: 7083/1: rewr... |
682 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
683 |
|
cc890cd78 ARM: 7083/1: rewr... |
684 685 686 687 688 689 690 691 692 693 |
static inline void u300_gpio_free_ports(struct u300_gpio *gpio) { struct u300_gpio_port *port; struct list_head *p, *n; list_for_each_safe(p, n, &gpio->port_list) { port = list_entry(p, struct u300_gpio_port, node); list_del(&port->node); free_irq(port->irq, port); kfree(port); |
bd41b99d4 [ARM] 5471/2: U30... |
694 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
695 |
} |
cc890cd78 ARM: 7083/1: rewr... |
696 |
static int __init u300_gpio_probe(struct platform_device *pdev) |
bd41b99d4 [ARM] 5471/2: U30... |
697 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
698 699 |
struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev); struct u300_gpio *gpio; |
bd41b99d4 [ARM] 5471/2: U30... |
700 |
int err = 0; |
cc890cd78 ARM: 7083/1: rewr... |
701 702 703 |
int portno; u32 val; u32 ifr; |
bd41b99d4 [ARM] 5471/2: U30... |
704 |
int i; |
bd41b99d4 [ARM] 5471/2: U30... |
705 |
|
cc890cd78 ARM: 7083/1: rewr... |
706 707 708 709 710 711 712 713 714 715 716 717 718 |
gpio = kzalloc(sizeof(struct u300_gpio), GFP_KERNEL); if (gpio == NULL) { dev_err(&pdev->dev, "failed to allocate memory "); return -ENOMEM; } gpio->chip = u300_gpio_chip; gpio->chip.ngpio = plat->ports * U300_GPIO_PINS_PER_PORT; gpio->irq_base = plat->gpio_irq_base; gpio->chip.dev = &pdev->dev; gpio->chip.base = plat->gpio_base; gpio->dev = &pdev->dev; |
bd41b99d4 [ARM] 5471/2: U30... |
719 720 |
/* Get GPIO clock */ |
cc890cd78 ARM: 7083/1: rewr... |
721 722 723 724 725 |
gpio->clk = clk_get(gpio->dev, NULL); if (IS_ERR(gpio->clk)) { err = PTR_ERR(gpio->clk); dev_err(gpio->dev, "could not get GPIO clock "); |
bd41b99d4 [ARM] 5471/2: U30... |
726 727 |
goto err_no_clk; } |
cc890cd78 ARM: 7083/1: rewr... |
728 |
err = clk_enable(gpio->clk); |
bd41b99d4 [ARM] 5471/2: U30... |
729 |
if (err) { |
cc890cd78 ARM: 7083/1: rewr... |
730 731 |
dev_err(gpio->dev, "could not enable GPIO clock "); |
bd41b99d4 [ARM] 5471/2: U30... |
732 733 |
goto err_no_clk_enable; } |
cc890cd78 ARM: 7083/1: rewr... |
734 735 736 737 738 |
gpio->memres = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!gpio->memres) { dev_err(gpio->dev, "could not get GPIO memory resource "); err = -ENODEV; |
bd41b99d4 [ARM] 5471/2: U30... |
739 |
goto err_no_resource; |
cc890cd78 ARM: 7083/1: rewr... |
740 |
} |
bd41b99d4 [ARM] 5471/2: U30... |
741 |
|
cc890cd78 ARM: 7083/1: rewr... |
742 743 |
if (!request_mem_region(gpio->memres->start, resource_size(gpio->memres), |
28f65c11f treewide: Convert... |
744 |
"GPIO Controller")) { |
bd41b99d4 [ARM] 5471/2: U30... |
745 746 747 |
err = -ENODEV; goto err_no_ioregion; } |
cc890cd78 ARM: 7083/1: rewr... |
748 749 |
gpio->base = ioremap(gpio->memres->start, resource_size(gpio->memres)); if (!gpio->base) { |
bd41b99d4 [ARM] 5471/2: U30... |
750 751 752 |
err = -ENOMEM; goto err_no_ioremap; } |
cc890cd78 ARM: 7083/1: rewr... |
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 |
if (plat->variant == U300_GPIO_COH901335) { dev_info(gpio->dev, "initializing GPIO Controller COH 901 335 "); gpio->stride = U300_335_PORT_STRIDE; gpio->pcr = U300_335_PXPCR; gpio->dor = U300_335_PXPDOR; gpio->dir = U300_335_PXPDIR; gpio->per = U300_335_PXPER; gpio->icr = U300_335_PXICR; gpio->ien = U300_335_PXIEN; gpio->iev = U300_335_PXIEV; ifr = U300_335_PXIFR; /* Turn on the GPIO block */ writel(U300_335_CR_BLOCK_CLOCK_ENABLE, gpio->base + U300_335_CR); } else if (plat->variant == U300_GPIO_COH901571_3_BS335 || plat->variant == U300_GPIO_COH901571_3_BS365) { dev_info(gpio->dev, "initializing GPIO Controller COH 901 571/3 "); gpio->stride = U300_571_PORT_STRIDE; gpio->pcr = U300_571_PXPCR; gpio->dor = U300_571_PXPDOR; gpio->dir = U300_571_PXPDIR; gpio->per = U300_571_PXPER; gpio->icr = U300_571_PXICR; gpio->ien = U300_571_PXIEN; gpio->iev = U300_571_PXIEV; ifr = U300_571_PXIFR; val = readl(gpio->base + U300_571_CR); dev_info(gpio->dev, "COH901571/3 block version: %d, " \ "number of cores: %d totalling %d pins ", ((val & 0x000001FC) >> 2), ((val & 0x0000FE00) >> 9), ((val & 0x0000FE00) >> 9) * 8); writel(U300_571_CR_BLOCK_CLKRQ_ENABLE, gpio->base + U300_571_CR); u300_gpio_init_coh901571(gpio, plat); } else { dev_err(gpio->dev, "unknown block variant "); err = -ENODEV; goto err_unknown_variant; } /* Add each port with its IRQ separately */ INIT_LIST_HEAD(&gpio->port_list); for (portno = 0 ; portno < plat->ports; portno++) { struct u300_gpio_port *port = kmalloc(sizeof(struct u300_gpio_port), GFP_KERNEL); if (!port) { dev_err(gpio->dev, "out of memory "); err = -ENOMEM; goto err_no_port; |
bd41b99d4 [ARM] 5471/2: U30... |
814 |
} |
cc890cd78 ARM: 7083/1: rewr... |
815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 |
snprintf(port->name, 8, "gpio%d", portno); port->number = portno; port->gpio = gpio; port->irq = platform_get_irq_byname(pdev, port->name); dev_dbg(gpio->dev, "register IRQ %d for %s ", port->irq, port->name); irq_set_chained_handler(port->irq, u300_gpio_irq_handler); irq_set_handler_data(port->irq, port); /* For each GPIO pin set the unique IRQ handler */ for (i = 0; i < U300_GPIO_PINS_PER_PORT; i++) { int irqno = gpio->irq_base + (portno << 3) + i; dev_dbg(gpio->dev, "handler for IRQ %d on %s ", irqno, port->name); irq_set_chip_and_handler(irqno, &u300_gpio_irqchip, handle_simple_irq); set_irq_flags(irqno, IRQF_VALID); irq_set_chip_data(irqno, port); } /* Turns off irq force (test register) for this port */ writel(0x0, gpio->base + portno * gpio->stride + ifr); list_add_tail(&port->node, &gpio->port_list); |
bd41b99d4 [ARM] 5471/2: U30... |
847 |
} |
cc890cd78 ARM: 7083/1: rewr... |
848 849 850 851 852 853 854 855 856 857 858 |
dev_dbg(gpio->dev, "initialized %d GPIO ports ", portno); err = gpiochip_add(&gpio->chip); if (err) { dev_err(gpio->dev, "unable to add gpiochip: %d ", err); goto err_no_chip; } platform_set_drvdata(pdev, gpio); |
bd41b99d4 [ARM] 5471/2: U30... |
859 860 |
return 0; |
cc890cd78 ARM: 7083/1: rewr... |
861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 |
err_no_chip: err_no_port: u300_gpio_free_ports(gpio); err_unknown_variant: iounmap(gpio->base); err_no_ioremap: release_mem_region(gpio->memres->start, resource_size(gpio->memres)); err_no_ioregion: err_no_resource: clk_disable(gpio->clk); err_no_clk_enable: clk_put(gpio->clk); err_no_clk: kfree(gpio); dev_info(&pdev->dev, "module ERROR:%d ", err); |
bd41b99d4 [ARM] 5471/2: U30... |
877 878 |
return err; } |
cc890cd78 ARM: 7083/1: rewr... |
879 |
static int __exit u300_gpio_remove(struct platform_device *pdev) |
bd41b99d4 [ARM] 5471/2: U30... |
880 |
{ |
cc890cd78 ARM: 7083/1: rewr... |
881 882 883 |
struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev); struct u300_gpio *gpio = platform_get_drvdata(pdev); int err; |
bd41b99d4 [ARM] 5471/2: U30... |
884 885 |
/* Turn off the GPIO block */ |
cc890cd78 ARM: 7083/1: rewr... |
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 |
if (plat->variant == U300_GPIO_COH901335) writel(0x00000000U, gpio->base + U300_335_CR); if (plat->variant == U300_GPIO_COH901571_3_BS335 || plat->variant == U300_GPIO_COH901571_3_BS365) writel(0x00000000U, gpio->base + U300_571_CR); err = gpiochip_remove(&gpio->chip); if (err < 0) { dev_err(gpio->dev, "unable to remove gpiochip: %d ", err); return err; } u300_gpio_free_ports(gpio); iounmap(gpio->base); release_mem_region(gpio->memres->start, resource_size(gpio->memres)); clk_disable(gpio->clk); clk_put(gpio->clk); platform_set_drvdata(pdev, NULL); kfree(gpio); |
bd41b99d4 [ARM] 5471/2: U30... |
906 907 |
return 0; } |
cc890cd78 ARM: 7083/1: rewr... |
908 |
static struct platform_driver u300_gpio_driver = { |
bd41b99d4 [ARM] 5471/2: U30... |
909 910 911 |
.driver = { .name = "u300-gpio", }, |
cc890cd78 ARM: 7083/1: rewr... |
912 |
.remove = __exit_p(u300_gpio_remove), |
bd41b99d4 [ARM] 5471/2: U30... |
913 914 915 916 917 |
}; static int __init u300_gpio_init(void) { |
cc890cd78 ARM: 7083/1: rewr... |
918 |
return platform_driver_probe(&u300_gpio_driver, u300_gpio_probe); |
bd41b99d4 [ARM] 5471/2: U30... |
919 920 921 922 |
} static void __exit u300_gpio_exit(void) { |
cc890cd78 ARM: 7083/1: rewr... |
923 |
platform_driver_unregister(&u300_gpio_driver); |
bd41b99d4 [ARM] 5471/2: U30... |
924 925 926 927 928 929 |
} arch_initcall(u300_gpio_init); module_exit(u300_gpio_exit); MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); |
cc890cd78 ARM: 7083/1: rewr... |
930 |
MODULE_DESCRIPTION("ST-Ericsson AB COH 901 335/COH 901 571/3 GPIO driver"); |
bd41b99d4 [ARM] 5471/2: U30... |
931 |
MODULE_LICENSE("GPL"); |