Commit | Line | Data |
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1da177e4 LT |
1 | /* ------------------------------------------------------------------------- */ |
2 | /* i2c-iop3xx.c i2c driver algorithms for Intel XScale IOP3xx & IXP46x */ | |
3 | /* ------------------------------------------------------------------------- */ | |
4 | /* Copyright (C) 2003 Peter Milne, D-TACQ Solutions Ltd | |
5 | * <Peter dot Milne at D hyphen TACQ dot com> | |
6 | * | |
7 | * With acknowledgements to i2c-algo-ibm_ocp.c by | |
8 | * Ian DaSilva, MontaVista Software, Inc. idasilva@mvista.com | |
9 | * | |
10 | * And i2c-algo-pcf.c, which was created by Simon G. Vogl and Hans Berglund: | |
11 | * | |
12 | * Copyright (C) 1995-1997 Simon G. Vogl, 1998-2000 Hans Berglund | |
13 | * | |
fbd9a6d7 | 14 | * And which acknowledged Kyösti Mälkki <kmalkki@cc.hut.fi>, |
1da177e4 LT |
15 | * Frodo Looijaard <frodol@dds.nl>, Martin Bailey<mbailey@littlefeet-inc.com> |
16 | * | |
17 | * Major cleanup by Deepak Saxena <dsaxena@plexity.net>, 01/2005: | |
18 | * | |
19 | * - Use driver model to pass per-chip info instead of hardcoding and #ifdefs | |
20 | * - Use ioremap/__raw_readl/__raw_writel instead of direct dereference | |
21 | * - Make it work with IXP46x chips | |
22 | * - Cleanup function names, coding style, etc | |
23 | * | |
39288e1a PM |
24 | * - writing to slave address causes latchup on iop331. |
25 | * fix: driver refuses to address self. | |
26 | * | |
1da177e4 LT |
27 | * This program is free software; you can redistribute it and/or modify |
28 | * it under the terms of the GNU General Public License as published by | |
29 | * the Free Software Foundation, version 2. | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/interrupt.h> |
33 | #include <linux/kernel.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/errno.h> | |
d052d1be | 39 | #include <linux/platform_device.h> |
1da177e4 LT |
40 | #include <linux/i2c.h> |
41 | ||
42 | #include <asm/io.h> | |
43 | ||
44 | #include "i2c-iop3xx.h" | |
45 | ||
46 | /* global unit counter */ | |
60507095 | 47 | static int i2c_id; |
1da177e4 LT |
48 | |
49 | static inline unsigned char | |
50 | iic_cook_addr(struct i2c_msg *msg) | |
51 | { | |
52 | unsigned char addr; | |
53 | ||
54 | addr = (msg->addr << 1); | |
55 | ||
56 | if (msg->flags & I2C_M_RD) | |
57 | addr |= 1; | |
58 | ||
59 | /* | |
60 | * Read or Write? | |
61 | */ | |
62 | if (msg->flags & I2C_M_REV_DIR_ADDR) | |
63 | addr ^= 1; | |
64 | ||
65 | return addr; | |
66 | } | |
67 | ||
68 | static void | |
69 | iop3xx_i2c_reset(struct i2c_algo_iop3xx_data *iop3xx_adap) | |
70 | { | |
71 | /* Follows devman 9.3 */ | |
72 | __raw_writel(IOP3XX_ICR_UNIT_RESET, iop3xx_adap->ioaddr + CR_OFFSET); | |
73 | __raw_writel(IOP3XX_ISR_CLEARBITS, iop3xx_adap->ioaddr + SR_OFFSET); | |
74 | __raw_writel(0, iop3xx_adap->ioaddr + CR_OFFSET); | |
75 | } | |
76 | ||
1da177e4 LT |
77 | static void |
78 | iop3xx_i2c_enable(struct i2c_algo_iop3xx_data *iop3xx_adap) | |
79 | { | |
80 | u32 cr = IOP3XX_ICR_GCD | IOP3XX_ICR_SCLEN | IOP3XX_ICR_UE; | |
81 | ||
82 | /* | |
44bbe87e | 83 | * Every time unit enable is asserted, GPOD needs to be cleared |
72edd84a | 84 | * on IOP3XX to avoid data corruption on the bus. |
1da177e4 | 85 | */ |
588ef769 | 86 | #if defined(CONFIG_ARCH_IOP32X) || defined(CONFIG_ARCH_IOP33X) |
72edd84a LB |
87 | if (iop3xx_adap->id == 0) { |
88 | gpio_line_set(IOP3XX_GPIO_LINE(7), GPIO_LOW); | |
89 | gpio_line_set(IOP3XX_GPIO_LINE(6), GPIO_LOW); | |
90 | } else { | |
91 | gpio_line_set(IOP3XX_GPIO_LINE(5), GPIO_LOW); | |
92 | gpio_line_set(IOP3XX_GPIO_LINE(4), GPIO_LOW); | |
93 | } | |
1da177e4 LT |
94 | #endif |
95 | /* NB SR bits not same position as CR IE bits :-( */ | |
96 | iop3xx_adap->SR_enabled = | |
97 | IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD | | |
98 | IOP3XX_ISR_RXFULL | IOP3XX_ISR_TXEMPTY; | |
99 | ||
100 | cr |= IOP3XX_ICR_ALD_IE | IOP3XX_ICR_BERR_IE | | |
101 | IOP3XX_ICR_RXFULL_IE | IOP3XX_ICR_TXEMPTY_IE; | |
102 | ||
103 | __raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET); | |
104 | } | |
105 | ||
106 | static void | |
107 | iop3xx_i2c_transaction_cleanup(struct i2c_algo_iop3xx_data *iop3xx_adap) | |
108 | { | |
109 | unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET); | |
110 | ||
111 | cr &= ~(IOP3XX_ICR_MSTART | IOP3XX_ICR_TBYTE | | |
112 | IOP3XX_ICR_MSTOP | IOP3XX_ICR_SCLEN); | |
113 | ||
114 | __raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET); | |
115 | } | |
116 | ||
117 | /* | |
118 | * NB: the handler has to clear the source of the interrupt! | |
119 | * Then it passes the SR flags of interest to BH via adap data | |
120 | */ | |
121 | static irqreturn_t | |
7d12e780 | 122 | iop3xx_i2c_irq_handler(int this_irq, void *dev_id) |
1da177e4 LT |
123 | { |
124 | struct i2c_algo_iop3xx_data *iop3xx_adap = dev_id; | |
125 | u32 sr = __raw_readl(iop3xx_adap->ioaddr + SR_OFFSET); | |
126 | ||
127 | if ((sr &= iop3xx_adap->SR_enabled)) { | |
128 | __raw_writel(sr, iop3xx_adap->ioaddr + SR_OFFSET); | |
129 | iop3xx_adap->SR_received |= sr; | |
130 | wake_up_interruptible(&iop3xx_adap->waitq); | |
131 | } | |
132 | return IRQ_HANDLED; | |
133 | } | |
134 | ||
135 | /* check all error conditions, clear them , report most important */ | |
136 | static int | |
137 | iop3xx_i2c_error(u32 sr) | |
138 | { | |
139 | int rc = 0; | |
140 | ||
141 | if ((sr & IOP3XX_ISR_BERRD)) { | |
142 | if ( !rc ) rc = -I2C_ERR_BERR; | |
143 | } | |
144 | if ((sr & IOP3XX_ISR_ALD)) { | |
145 | if ( !rc ) rc = -I2C_ERR_ALD; | |
146 | } | |
147 | return rc; | |
148 | } | |
149 | ||
150 | static inline u32 | |
151 | iop3xx_i2c_get_srstat(struct i2c_algo_iop3xx_data *iop3xx_adap) | |
152 | { | |
153 | unsigned long flags; | |
154 | u32 sr; | |
155 | ||
156 | spin_lock_irqsave(&iop3xx_adap->lock, flags); | |
157 | sr = iop3xx_adap->SR_received; | |
158 | iop3xx_adap->SR_received = 0; | |
159 | spin_unlock_irqrestore(&iop3xx_adap->lock, flags); | |
160 | ||
161 | return sr; | |
162 | } | |
163 | ||
164 | /* | |
165 | * sleep until interrupted, then recover and analyse the SR | |
166 | * saved by handler | |
167 | */ | |
168 | typedef int (* compare_func)(unsigned test, unsigned mask); | |
169 | /* returns 1 on correct comparison */ | |
170 | ||
171 | static int | |
172 | iop3xx_i2c_wait_event(struct i2c_algo_iop3xx_data *iop3xx_adap, | |
173 | unsigned flags, unsigned* status, | |
174 | compare_func compare) | |
175 | { | |
176 | unsigned sr = 0; | |
177 | int interrupted; | |
178 | int done; | |
179 | int rc = 0; | |
180 | ||
181 | do { | |
182 | interrupted = wait_event_interruptible_timeout ( | |
183 | iop3xx_adap->waitq, | |
fbd9a6d7 | 184 | (done = compare( sr = iop3xx_i2c_get_srstat(iop3xx_adap) ,flags )), |
1da177e4 LT |
185 | 1 * HZ; |
186 | ); | |
187 | if ((rc = iop3xx_i2c_error(sr)) < 0) { | |
188 | *status = sr; | |
189 | return rc; | |
190 | } else if (!interrupted) { | |
191 | *status = sr; | |
192 | return -ETIMEDOUT; | |
193 | } | |
194 | } while(!done); | |
195 | ||
196 | *status = sr; | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Concrete compare_funcs | |
203 | */ | |
204 | static int | |
205 | all_bits_clear(unsigned test, unsigned mask) | |
206 | { | |
207 | return (test & mask) == 0; | |
208 | } | |
209 | ||
210 | static int | |
211 | any_bits_set(unsigned test, unsigned mask) | |
212 | { | |
213 | return (test & mask) != 0; | |
214 | } | |
215 | ||
216 | static int | |
217 | iop3xx_i2c_wait_tx_done(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status) | |
218 | { | |
219 | return iop3xx_i2c_wait_event( | |
220 | iop3xx_adap, | |
221 | IOP3XX_ISR_TXEMPTY | IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD, | |
222 | status, any_bits_set); | |
223 | } | |
224 | ||
225 | static int | |
226 | iop3xx_i2c_wait_rx_done(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status) | |
227 | { | |
228 | return iop3xx_i2c_wait_event( | |
229 | iop3xx_adap, | |
230 | IOP3XX_ISR_RXFULL | IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD, | |
231 | status, any_bits_set); | |
232 | } | |
233 | ||
234 | static int | |
235 | iop3xx_i2c_wait_idle(struct i2c_algo_iop3xx_data *iop3xx_adap, int *status) | |
236 | { | |
237 | return iop3xx_i2c_wait_event( | |
238 | iop3xx_adap, IOP3XX_ISR_UNITBUSY, status, all_bits_clear); | |
239 | } | |
240 | ||
241 | static int | |
242 | iop3xx_i2c_send_target_addr(struct i2c_algo_iop3xx_data *iop3xx_adap, | |
243 | struct i2c_msg* msg) | |
244 | { | |
245 | unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET); | |
246 | int status; | |
247 | int rc; | |
248 | ||
39288e1a PM |
249 | /* avoid writing to my slave address (hangs on 80331), |
250 | * forbidden in Intel developer manual | |
251 | */ | |
252 | if (msg->addr == MYSAR) { | |
253 | return -EBUSY; | |
254 | } | |
255 | ||
1da177e4 LT |
256 | __raw_writel(iic_cook_addr(msg), iop3xx_adap->ioaddr + DBR_OFFSET); |
257 | ||
258 | cr &= ~(IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK); | |
259 | cr |= IOP3XX_ICR_MSTART | IOP3XX_ICR_TBYTE; | |
260 | ||
261 | __raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET); | |
262 | rc = iop3xx_i2c_wait_tx_done(iop3xx_adap, &status); | |
263 | ||
264 | return rc; | |
265 | } | |
266 | ||
267 | static int | |
268 | iop3xx_i2c_write_byte(struct i2c_algo_iop3xx_data *iop3xx_adap, char byte, | |
269 | int stop) | |
270 | { | |
271 | unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET); | |
272 | int status; | |
273 | int rc = 0; | |
274 | ||
275 | __raw_writel(byte, iop3xx_adap->ioaddr + DBR_OFFSET); | |
276 | cr &= ~IOP3XX_ICR_MSTART; | |
277 | if (stop) { | |
278 | cr |= IOP3XX_ICR_MSTOP; | |
279 | } else { | |
280 | cr &= ~IOP3XX_ICR_MSTOP; | |
281 | } | |
282 | cr |= IOP3XX_ICR_TBYTE; | |
283 | __raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET); | |
284 | rc = iop3xx_i2c_wait_tx_done(iop3xx_adap, &status); | |
285 | ||
286 | return rc; | |
287 | } | |
288 | ||
289 | static int | |
290 | iop3xx_i2c_read_byte(struct i2c_algo_iop3xx_data *iop3xx_adap, char* byte, | |
291 | int stop) | |
292 | { | |
293 | unsigned long cr = __raw_readl(iop3xx_adap->ioaddr + CR_OFFSET); | |
294 | int status; | |
295 | int rc = 0; | |
296 | ||
297 | cr &= ~IOP3XX_ICR_MSTART; | |
298 | ||
299 | if (stop) { | |
300 | cr |= IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK; | |
301 | } else { | |
302 | cr &= ~(IOP3XX_ICR_MSTOP | IOP3XX_ICR_NACK); | |
303 | } | |
304 | cr |= IOP3XX_ICR_TBYTE; | |
305 | __raw_writel(cr, iop3xx_adap->ioaddr + CR_OFFSET); | |
306 | ||
307 | rc = iop3xx_i2c_wait_rx_done(iop3xx_adap, &status); | |
308 | ||
309 | *byte = __raw_readl(iop3xx_adap->ioaddr + DBR_OFFSET); | |
310 | ||
311 | return rc; | |
312 | } | |
313 | ||
314 | static int | |
315 | iop3xx_i2c_writebytes(struct i2c_adapter *i2c_adap, const char *buf, int count) | |
316 | { | |
317 | struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data; | |
318 | int ii; | |
319 | int rc = 0; | |
320 | ||
321 | for (ii = 0; rc == 0 && ii != count; ++ii) | |
322 | rc = iop3xx_i2c_write_byte(iop3xx_adap, buf[ii], ii==count-1); | |
323 | return rc; | |
324 | } | |
325 | ||
326 | static int | |
327 | iop3xx_i2c_readbytes(struct i2c_adapter *i2c_adap, char *buf, int count) | |
328 | { | |
329 | struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data; | |
330 | int ii; | |
331 | int rc = 0; | |
332 | ||
333 | for (ii = 0; rc == 0 && ii != count; ++ii) | |
334 | rc = iop3xx_i2c_read_byte(iop3xx_adap, &buf[ii], ii==count-1); | |
335 | ||
336 | return rc; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Description: This function implements combined transactions. Combined | |
341 | * transactions consist of combinations of reading and writing blocks of data. | |
342 | * FROM THE SAME ADDRESS | |
343 | * Each transfer (i.e. a read or a write) is separated by a repeated start | |
344 | * condition. | |
345 | */ | |
346 | static int | |
347 | iop3xx_i2c_handle_msg(struct i2c_adapter *i2c_adap, struct i2c_msg* pmsg) | |
348 | { | |
349 | struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data; | |
350 | int rc; | |
351 | ||
352 | rc = iop3xx_i2c_send_target_addr(iop3xx_adap, pmsg); | |
353 | if (rc < 0) { | |
354 | return rc; | |
355 | } | |
356 | ||
357 | if ((pmsg->flags&I2C_M_RD)) { | |
358 | return iop3xx_i2c_readbytes(i2c_adap, pmsg->buf, pmsg->len); | |
359 | } else { | |
360 | return iop3xx_i2c_writebytes(i2c_adap, pmsg->buf, pmsg->len); | |
361 | } | |
362 | } | |
363 | ||
364 | /* | |
365 | * master_xfer() - main read/write entry | |
366 | */ | |
367 | static int | |
368 | iop3xx_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, | |
369 | int num) | |
370 | { | |
371 | struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data; | |
372 | int im = 0; | |
373 | int ret = 0; | |
374 | int status; | |
375 | ||
376 | iop3xx_i2c_wait_idle(iop3xx_adap, &status); | |
377 | iop3xx_i2c_reset(iop3xx_adap); | |
378 | iop3xx_i2c_enable(iop3xx_adap); | |
379 | ||
380 | for (im = 0; ret == 0 && im != num; im++) { | |
381 | ret = iop3xx_i2c_handle_msg(i2c_adap, &msgs[im]); | |
382 | } | |
383 | ||
384 | iop3xx_i2c_transaction_cleanup(iop3xx_adap); | |
385 | ||
386 | if(ret) | |
387 | return ret; | |
388 | ||
389 | return im; | |
390 | } | |
391 | ||
1da177e4 LT |
392 | static u32 |
393 | iop3xx_i2c_func(struct i2c_adapter *adap) | |
394 | { | |
395 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; | |
396 | } | |
397 | ||
8f9082c5 | 398 | static const struct i2c_algorithm iop3xx_i2c_algo = { |
1da177e4 | 399 | .master_xfer = iop3xx_i2c_master_xfer, |
1da177e4 LT |
400 | .functionality = iop3xx_i2c_func, |
401 | }; | |
402 | ||
403 | static int | |
3ae5eaec | 404 | iop3xx_i2c_remove(struct platform_device *pdev) |
1da177e4 | 405 | { |
3ae5eaec | 406 | struct i2c_adapter *padapter = platform_get_drvdata(pdev); |
1da177e4 LT |
407 | struct i2c_algo_iop3xx_data *adapter_data = |
408 | (struct i2c_algo_iop3xx_data *)padapter->algo_data; | |
409 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
410 | unsigned long cr = __raw_readl(adapter_data->ioaddr + CR_OFFSET); | |
411 | ||
412 | /* | |
413 | * Disable the actual HW unit | |
414 | */ | |
415 | cr &= ~(IOP3XX_ICR_ALD_IE | IOP3XX_ICR_BERR_IE | | |
416 | IOP3XX_ICR_RXFULL_IE | IOP3XX_ICR_TXEMPTY_IE); | |
417 | __raw_writel(cr, adapter_data->ioaddr + CR_OFFSET); | |
418 | ||
419 | iounmap((void __iomem*)adapter_data->ioaddr); | |
420 | release_mem_region(res->start, IOP3XX_I2C_IO_SIZE); | |
421 | kfree(adapter_data); | |
422 | kfree(padapter); | |
423 | ||
3ae5eaec | 424 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
425 | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static int | |
3ae5eaec | 430 | iop3xx_i2c_probe(struct platform_device *pdev) |
1da177e4 | 431 | { |
1da177e4 | 432 | struct resource *res; |
48944738 | 433 | int ret, irq; |
1da177e4 LT |
434 | struct i2c_adapter *new_adapter; |
435 | struct i2c_algo_iop3xx_data *adapter_data; | |
436 | ||
5263ebb5 | 437 | new_adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL); |
1da177e4 LT |
438 | if (!new_adapter) { |
439 | ret = -ENOMEM; | |
440 | goto out; | |
441 | } | |
1da177e4 | 442 | |
5263ebb5 | 443 | adapter_data = kzalloc(sizeof(struct i2c_algo_iop3xx_data), GFP_KERNEL); |
1da177e4 LT |
444 | if (!adapter_data) { |
445 | ret = -ENOMEM; | |
446 | goto free_adapter; | |
447 | } | |
1da177e4 LT |
448 | |
449 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
450 | if (!res) { | |
451 | ret = -ENODEV; | |
452 | goto free_both; | |
453 | } | |
454 | ||
455 | if (!request_mem_region(res->start, IOP3XX_I2C_IO_SIZE, pdev->name)) { | |
456 | ret = -EBUSY; | |
457 | goto free_both; | |
458 | } | |
459 | ||
460 | /* set the adapter enumeration # */ | |
461 | adapter_data->id = i2c_id++; | |
462 | ||
463 | adapter_data->ioaddr = (u32)ioremap(res->start, IOP3XX_I2C_IO_SIZE); | |
464 | if (!adapter_data->ioaddr) { | |
465 | ret = -ENOMEM; | |
466 | goto release_region; | |
467 | } | |
468 | ||
48944738 DV |
469 | irq = platform_get_irq(pdev, 0); |
470 | if (irq < 0) { | |
471 | ret = -ENXIO; | |
472 | goto unmap; | |
473 | } | |
474 | ret = request_irq(irq, iop3xx_i2c_irq_handler, 0, | |
1da177e4 | 475 | pdev->name, adapter_data); |
fbd9a6d7 DW |
476 | |
477 | if (ret) { | |
1da177e4 LT |
478 | ret = -EIO; |
479 | goto unmap; | |
480 | } | |
481 | ||
482 | memcpy(new_adapter->name, pdev->name, strlen(pdev->name)); | |
483 | new_adapter->id = I2C_HW_IOP3XX; | |
484 | new_adapter->owner = THIS_MODULE; | |
432ca994 | 485 | new_adapter->class = I2C_CLASS_HWMON; |
1da177e4 | 486 | new_adapter->dev.parent = &pdev->dev; |
757ba4c6 | 487 | new_adapter->nr = pdev->id; |
1da177e4 LT |
488 | |
489 | /* | |
490 | * Default values...should these come in from board code? | |
491 | */ | |
492 | new_adapter->timeout = 100; | |
493 | new_adapter->retries = 3; | |
494 | new_adapter->algo = &iop3xx_i2c_algo; | |
495 | ||
496 | init_waitqueue_head(&adapter_data->waitq); | |
497 | spin_lock_init(&adapter_data->lock); | |
498 | ||
499 | iop3xx_i2c_reset(adapter_data); | |
1da177e4 LT |
500 | iop3xx_i2c_enable(adapter_data); |
501 | ||
3ae5eaec | 502 | platform_set_drvdata(pdev, new_adapter); |
1da177e4 LT |
503 | new_adapter->algo_data = adapter_data; |
504 | ||
757ba4c6 | 505 | i2c_add_numbered_adapter(new_adapter); |
1da177e4 LT |
506 | |
507 | return 0; | |
508 | ||
509 | unmap: | |
510 | iounmap((void __iomem*)adapter_data->ioaddr); | |
511 | ||
512 | release_region: | |
513 | release_mem_region(res->start, IOP3XX_I2C_IO_SIZE); | |
514 | ||
515 | free_both: | |
516 | kfree(adapter_data); | |
517 | ||
518 | free_adapter: | |
519 | kfree(new_adapter); | |
520 | ||
521 | out: | |
522 | return ret; | |
523 | } | |
524 | ||
525 | ||
3ae5eaec | 526 | static struct platform_driver iop3xx_i2c_driver = { |
1da177e4 | 527 | .probe = iop3xx_i2c_probe, |
3ae5eaec RK |
528 | .remove = iop3xx_i2c_remove, |
529 | .driver = { | |
530 | .owner = THIS_MODULE, | |
531 | .name = "IOP3xx-I2C", | |
532 | }, | |
1da177e4 LT |
533 | }; |
534 | ||
535 | static int __init | |
536 | i2c_iop3xx_init (void) | |
537 | { | |
3ae5eaec | 538 | return platform_driver_register(&iop3xx_i2c_driver); |
1da177e4 LT |
539 | } |
540 | ||
541 | static void __exit | |
542 | i2c_iop3xx_exit (void) | |
543 | { | |
3ae5eaec | 544 | platform_driver_unregister(&iop3xx_i2c_driver); |
1da177e4 LT |
545 | return; |
546 | } | |
547 | ||
548 | module_init (i2c_iop3xx_init); | |
549 | module_exit (i2c_iop3xx_exit); | |
550 | ||
551 | MODULE_AUTHOR("D-TACQ Solutions Ltd <www.d-tacq.com>"); | |
552 | MODULE_DESCRIPTION("IOP3xx iic algorithm and driver"); | |
553 | MODULE_LICENSE("GPL"); |