aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/at91/patches-2.6.25/003-gpio-driver.patch
blob: e81c771c0c3571c8719738795e66c517008674f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
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
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
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
549
550
551
552
diff -urN linux-2.6.25.10.old/arch/arm/mach-at91/board-vlink.c linux-2.6.25.10/arch/arm/mach-at91/board-vlink.c
--- linux-2.6.25.10.old/arch/arm/mach-at91/board-vlink.c	2008-07-07 11:20:21.000000000 +0200
+++ linux-2.6.25.10/arch/arm/mach-at91/board-vlink.c	2008-07-07 12:11:40.000000000 +0200
@@ -99,7 +99,7 @@
 */
 
 static struct at91_mmc_data __initdata vlink_mmc_data = {
-//	.det_pin	= AT91_PIN_PB27,
+//	.det_pin	= AT91_PIN_PC10,
 	.slot_b		= 0,
 	.wire4		= 1,
 //	.wp_pin		= AT91_PIN_PA17,
@@ -136,6 +136,7 @@
 
 static void __init vlink_board_init(void)
 {
+	int v100;
 	/* Serial */
 	at91_add_device_serial();
 	/* Ethernet */
@@ -157,36 +158,66 @@
 //	at91_set_gpio_output(AT91_PIN_PB22, 1);	/* this MMC card slot can optionally use SPI signaling (CS3). */
 	at91_add_device_mmc(0, &vlink_mmc_data);
 #endif
+
+// Set VLink version PIN as an input with pull-up (V1.5 = GND)
+	at91_set_gpio_input(AT91_PIN_PC2, 1);
+	v100 = at91_get_gpio_value(AT91_PIN_PC2);
+
 	/* LEDs */
 //	at91_gpio_leds(vlink_leds, ARRAY_SIZE(vlink_leds));
 
 /* Other LED's */
-       at91_set_gpio_output(AT91_PIN_PC7, 1);  // LED FRONT AP1
-       at91_set_gpio_output(AT91_PIN_PC8, 1);  // LED FRONT BP1
-       at91_set_gpio_output(AT91_PIN_PB14, 1); // LED BACK AP1
-       at91_set_gpio_output(AT91_PIN_PB15, 1); // LED BACK BP1
-       at91_set_gpio_output(AT91_PIN_PB16, 1); // LED BACK AP2
-       at91_set_gpio_output(AT91_PIN_PB17, 1); // LED BACK BP2
+	at91_set_gpio_output(AT91_PIN_PC7, 1);  // LED FRONT AP1
+	at91_set_gpio_output(AT91_PIN_PC8, 1);  // LED FRONT BP1
+	at91_set_gpio_output(AT91_PIN_PB14, 1); // LED BACK AP1
+	at91_set_gpio_output(AT91_PIN_PB15, 1); // LED BACK BP1
+	at91_set_gpio_output(AT91_PIN_PB16, 1); // LED BACK AP2
+	at91_set_gpio_output(AT91_PIN_PB17, 1); // LED BACK BP2
+
+/* Test jig presence detection */
+	at91_set_gpio_input(AT91_PIN_PB8, 1);   // JIGPRESENT
 
 /* SIM Cards */
-       at91_set_gpio_output(AT91_PIN_PB9, 1);  // ENBSC3
-       at91_set_gpio_output(AT91_PIN_PB10, 1); // ENBSC2
-       at91_set_gpio_output(AT91_PIN_PB11, 1); // ENBSC1
+	if (at91_get_gpio_value(AT91_PIN_PB8)) {
+		at91_set_gpio_output(AT91_PIN_PB11, 0);
+		if (v100)
+			at91_set_gpio_output(AT91_PIN_PB9, 1);
+		else
+			at91_set_gpio_output(AT91_PIN_PC13, 1);
+	} else {
+		at91_set_gpio_output(AT91_PIN_PB11, 1);
+		if (v100)
+			at91_set_gpio_output(AT91_PIN_PB9, 0);
+		else
+			at91_set_gpio_output(AT91_PIN_PC13, 0);
+	}
 
-/* GSM Module Control */
-       at91_set_gpio_output(AT91_PIN_PB12, 1); // GSMONOFF
+        at91_set_gpio_output(AT91_PIN_PB10, 1); // ENBSC2
 
-/* Test jig presence detection */
-       at91_set_gpio_input(AT91_PIN_PB8, 1);   // JIGPRESENT
+/* GSM Module Control */
+	at91_set_gpio_output(AT91_PIN_PB12, 1); // GSMONOFF
 
 /* Power indicator */
-       at91_set_gpio_input(AT91_PIN_PB22, 1);  // PWR_IND
+	at91_set_gpio_input(AT91_PIN_PB22, 1);  // PWR_IND
 
 /* USB Device control */
-       at91_set_gpio_input(AT91_PIN_PB27, 1);  // UDB_CNX
-       at91_set_gpio_output(AT91_PIN_PB28, 1); // UDB_PUP
-			 at91_set_multi_drive(AT91_PIN_PB28, 1); // Set to multi-drive
-
+	at91_set_gpio_input(AT91_PIN_PB27, 1);  // UDB_CNX
+	at91_set_gpio_output(AT91_PIN_PB28, 1); // UDB_PUP
+	at91_set_multi_drive(AT91_PIN_PB28, 1); // Set to multi-drive
+
+/* USB Power controls */
+
+	if (v100)
+	{       // V100
+		at91_set_gpio_input (AT91_PIN_PC12, 1);   // SD Card present
+	}
+	else
+	{       // DO special things for V1.5
+		at91_set_gpio_output(AT91_PIN_PB9 , 0);   // USB suspend
+		at91_set_gpio_input (AT91_PIN_PC10, 1);   // SD Card present
+		at91_set_gpio_output(AT91_PIN_PC11, 0);   // USB Vin CTRL for modules onboard
+		at91_set_gpio_output(AT91_PIN_PC12, 0);   // SIM control
+	}
 }
 
 MACHINE_START(VLINK, "FDL VersaLink")
diff -urN linux-2.6.25.10.old/arch/arm/mach-at91/gpio.c linux-2.6.25.10/arch/arm/mach-at91/gpio.c
--- linux-2.6.25.10.old/arch/arm/mach-at91/gpio.c	2008-07-07 11:20:21.000000000 +0200
+++ linux-2.6.25.10/arch/arm/mach-at91/gpio.c	2008-07-07 11:42:33.000000000 +0200
@@ -29,6 +29,7 @@
 
 static struct at91_gpio_bank *gpio;
 static int gpio_banks;
+static u32 pio_gpio_pin[4] = { 0, 0, 0, 0 };
 
 
 static inline void __iomem *pin_to_controller(unsigned pin)
@@ -71,9 +72,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
+
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
 	__raw_writel(mask, pio + PIO_PER);
@@ -130,10 +135,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
 
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
 	__raw_writel(mask, pio + PIO_ODR);
@@ -151,10 +159,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
 
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + PIO_PUDR);
 	__raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR));
@@ -262,6 +273,18 @@
 }
 EXPORT_SYMBOL(at91_get_gpio_value);
 
+int at91_is_pin_gpio(unsigned pin)
+{
+	void __iomem  *pio = pin_to_controller(pin);
+	unsigned  mask = pin_to_mask(pin);
+	int     bank = (pin - PIN_BASE) / 32;
+
+	if (!pio)
+		return -EINVAL;
+	return (pio_gpio_pin[bank] & mask) != 0;
+}
+EXPORT_SYMBOL(at91_is_pin_gpio);
+
 /*--------------------------------------------------------------------------*/
 
 #ifdef CONFIG_PM
diff -urN linux-2.6.25.10.old/drivers/char/Kconfig linux-2.6.25.10/drivers/char/Kconfig
--- linux-2.6.25.10.old/drivers/char/Kconfig	2008-07-07 11:20:21.000000000 +0200
+++ linux-2.6.25.10/drivers/char/Kconfig	2008-07-07 11:42:33.000000000 +0200
@@ -1072,5 +1072,12 @@
 	  The SPI driver gives user mode access to this serial
 	  bus on the AT91RM9200 processor.
 
+config AT91_VLIO
+	tristate "Versalink LED and GPIO interface"
+	depends on ARCH_AT91RM9200 && MACH_VLINK
+	default n
+	help
+	  Provides a handler GPIO's in userspace
+
 endmenu
 
diff -urN linux-2.6.25.10.old/drivers/char/Makefile linux-2.6.25.10/drivers/char/Makefile
--- linux-2.6.25.10.old/drivers/char/Makefile	2008-07-07 11:20:21.000000000 +0200
+++ linux-2.6.25.10/drivers/char/Makefile	2008-07-07 11:42:33.000000000 +0200
@@ -100,6 +100,7 @@
 obj-$(CONFIG_TELCLOCK)		+= tlclk.o
 obj-$(CONFIG_AT91_SPI)		+= at91_spi.o
 obj-$(CONFIG_AT91_SPIDEV)	+= at91_spidev.o
+obj-$(CONFIG_AT91_VLIO)		+= vlink_giu.o
 
 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-$(CONFIG_AGP)		+= agp/
diff -urN linux-2.6.25.10.old/drivers/char/vlink_giu.c linux-2.6.25.10/drivers/char/vlink_giu.c
--- linux-2.6.25.10.old/drivers/char/vlink_giu.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.25.10/drivers/char/vlink_giu.c	2008-07-07 13:41:51.000000000 +0200
@@ -0,0 +1,333 @@
+/*
+ *  Driver for FDL Versalink GPIO
+ *
+ *  Copyright (C) 2005 Guthrie Consulting
+ *	Author: Hamish Guthrie <hamish@prodigi.ch>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h>
+#include <linux/seq_file.h>
+#include <linux/cdev.h>
+#include <asm/arch/gpio.h>
+#include <asm/uaccess.h>
+
+static int major;	/* default is dynamic major device number */
+module_param(major, int, 0);
+MODULE_PARM_DESC(major, "Major device number");
+
+#define VIO_NR_DEVS	96
+
+struct vio_dev {
+	struct cdev cdev;
+};
+
+struct vio_dev *vio_devices;
+static struct class *vio_class;
+
+#define MAX_VIO_NAMES	24
+typedef struct
+{
+	char port;
+	char pin;
+	char name100[10];
+	char name150[10];
+} VIO_NAMES;
+
+VIO_NAMES VioName[MAX_VIO_NAMES] = 
+{ 	// Port, Pin, V100, V150
+	{'A',19,"port1DTR" ,"port1DTR"},
+	{'A',24,"port2DTR" ,"port2DTR"},
+	{'B',8, "jigOn"    ,"jigOn"} ,
+	{'B',9, "enbSC3"   ,"usbSUSPND"},
+	{'B',10,"enbSC2"   ,"enbSC2"},
+	{'B',11,"enbSC1"   ,"enbSC1"},
+	{'B',12,"gsmONOFF" ,"gsmONOFF"},
+	{'B',14,"ledBAP1"  ,"ledBAP1"},
+	{'B',15,"ledBBP1"  ,"ledBBP1"},
+	{'B',16,"ledBAP2"  ,"ledBAP2"},
+	{'B',17,"ledBBP2"  ,"ledBBP2"},
+	{'B',27,"udpCNX"   ,"udpCNX"},
+	{'B',28,"udpPUP"   ,"udpPUP"},
+	{'B',29,"port2DCD" ,"port2DCD"},
+	{'C',2, "vlVer100" ,"vlVer150"},
+	{'C',7, "ledFAP1"  ,"ledFAP1"},
+	{'C',8, "ledFBP1"  ,"ledFBP1"},
+	{'C',10,"vioC10"   ,"sdCardON"},
+	{'C',11,"vioC11"   ,"vusbCTRL"},
+	{'C',12,"sdCardON" ,"simCTRL"},
+	{'C',13,"vioC13"   ,"enbSC3"},
+	{'C',14,"ledFBP2"  ,"ledFBP2"},
+	{'C',15,"ledFAP2"  ,"ledFAP2"},
+	{0,0,"",""}
+};
+
+/*
+{'B',18,"gsmRIO"  ,"gsmRIO"},
+{'B',20,"gsmTX"   ,"gsmTX"},
+{'B',21,"gsmRX"   ,"gsmRX"},
+{'B',22,"gsmPIND" ,"gsmPIND"},
+{'B',23,"gsmDCD"  ,"gsmDCD"},
+{'B',24,"gsmCTS"  ,"gsmCTS"},
+{'B',25,"gsmDSR"  ,"gsmDSR"},
+{'B',26,"gsmRTS"  ,"gsmRTS"},
+*/
+static void lookupPINName(char version100, char *devName, char port, char pin);
+// EOF KWJ + AJE
+
+static ssize_t gpio_read(struct file *file, char __user *buf, size_t len,
+                         loff_t *ppos)
+{
+	unsigned int pin;
+	int retval;
+	char value = '0';
+
+	pin = iminor(file->f_dentry->d_inode);
+
+	retval = at91_get_gpio_value(PIN_BASE + pin);
+	if (retval < 0)
+		return -EFAULT;
+
+	value = retval + 0x30;
+	if (put_user(value, buf))
+		return -EFAULT;
+
+	return 1;
+}
+
+static ssize_t gpio_write(struct file *file, const char __user *data,
+                          size_t len, loff_t *ppos)
+{
+	unsigned int pin;
+	size_t i;
+	char c;
+	int retval = 0;
+
+	pin = iminor(file->f_dentry->d_inode);
+
+	for (i = 0; i < len; i++) {
+		if (get_user(c, data + i))
+			return -EFAULT;
+
+		switch (c) {
+		case '0':
+		case '1':
+			retval = at91_set_gpio_value(PIN_BASE + pin, (int)c - 0x30);
+			if (retval < 0)
+				return -EFAULT;
+			break;
+		default:
+			break;
+		}
+
+		if (retval < 0)
+			break;
+	}
+
+	return i;
+}
+
+static int gpio_open(struct inode *inode, struct file *file)
+{
+	return nonseekable_open(inode, file);
+}
+
+static int gpio_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static struct file_operations vio_fops = {
+	.owner		= THIS_MODULE,
+	.read		= gpio_read,
+	.write		= gpio_write,
+	.open		= gpio_open,
+	.release	= gpio_release,
+};
+
+static void vio_setup_cdev(struct vio_dev *dev, int index)
+{
+	int err, devno = MKDEV(major, index);
+
+	cdev_init(&dev->cdev, &vio_fops);
+	dev->cdev.owner = THIS_MODULE;
+	dev->cdev.ops = &vio_fops;
+	err = cdev_add (&dev->cdev, devno, 1);
+	if (err)
+		printk(KERN_NOTICE "vio: Error %d adding vio%d", err, index);
+}
+
+static int vio_remove(struct platform_device *dev)
+{
+	int i;
+	dev_t devno = MKDEV(major, 0);
+
+	if (vio_devices) {
+		for(i=0; i<VIO_NR_DEVS; i++) {
+			int iodev = at91_is_pin_gpio(PIN_BASE + i);
+			if (iodev) {
+				cdev_del(&vio_devices[i].cdev);
+				class_device_destroy(vio_class, MKDEV(major, i));
+			}
+		}
+		kfree(vio_devices);
+	}
+
+	class_destroy(vio_class);
+	unregister_chrdev_region(devno, VIO_NR_DEVS);
+
+	platform_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+static int vio_probe(struct platform_device *dev)
+{
+	int retval, i, j;
+	dev_t vdev = 0;
+	char devName[30];
+	int vlinkV100;
+
+	if (major) {
+		vdev = MKDEV(major, 0);
+		retval = register_chrdev_region(vdev, VIO_NR_DEVS, "vio");
+	} else {
+		retval = alloc_chrdev_region(&vdev, 0, VIO_NR_DEVS, "vio");
+		major = MAJOR(vdev);
+	}
+	if (retval < 0) {
+		printk(KERN_WARNING "vio: can't get major %d\n", major);
+		return retval;
+	}
+
+	if (major == 0) {
+		major = retval;
+		printk(KERN_INFO "vio: major number %d\n", major);
+	}
+
+	vio_class = class_create(THIS_MODULE, "vio");
+
+	if (IS_ERR(vio_class)) {
+		printk(KERN_ERR "vio: Error creating vio class\n");
+		vio_remove(dev);
+		return PTR_ERR(vio_class);
+	}
+
+	vlinkV100 = at91_get_gpio_value(AT91_PIN_PC2); // Denotes V1.5 if GND
+
+	vio_devices = kmalloc(VIO_NR_DEVS * sizeof(struct vio_dev), GFP_KERNEL);
+	if (!vio_devices) {
+		retval = -ENOMEM;
+		goto fail;
+	}
+	memset(vio_devices, 0, VIO_NR_DEVS * sizeof(struct vio_dev));
+
+	for (i=0; i<VIO_NR_DEVS/32; i++)
+		for(j=0; j<32; j++) {
+			int iodev = at91_is_pin_gpio(PIN_BASE + i*32 + j);
+			if (iodev) {
+				vio_setup_cdev(&vio_devices[i*32 + j], i*32 + j);
+				// Lookup name of vio to create
+				lookupPINName(vlinkV100, devName, i, j);
+				class_device_create(vio_class, NULL, MKDEV(major, i*32 + j), NULL, devName);
+			}
+		}
+
+	platform_set_drvdata(dev, vio_devices);
+
+	return 0;
+
+fail:
+	vio_remove(dev);
+	return retval;
+}
+
+static void lookupPINName(char version100, char *devName, char port, char pin)
+{
+	int i = -1;
+	char found = 0;
+	while (!found)
+	{
+		i++;
+		if (i >= MAX_VIO_NAMES)
+			break;
+		if (VioName[i].port == port+'A' && VioName[i].pin == pin)
+		{
+			printk(KERN_ERR "vio++: %c%d=%s\n",VioName[i].port,VioName[i].pin,VioName[i].name150);
+			if (version100)
+				strcpy(devName, VioName[i].name100);
+			else
+				strcpy(devName, VioName[i].name150);
+			found = 1;
+		}
+	}
+	if (!found)
+		sprintf(devName, "vio%c%d", port + 'A', pin);
+}
+	
+static struct platform_device *vio_platform_device;
+
+static struct platform_driver vio_driver = {
+	.probe 		= vio_probe,
+	.remove		= vio_remove,
+	.driver		= {
+		.name	= "vio",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init vio_init(void)
+{
+	int retval;
+
+	vio_platform_device = platform_device_register_simple("vio", -1, NULL, 0);
+	if (IS_ERR(vio_platform_device)) {
+		printk(KERN_WARNING "vio: device registration failed\n");
+		return PTR_ERR(vio_platform_device);
+	}
+
+	retval = platform_driver_register(&vio_driver);
+	if (retval < 0) {
+		printk(KERN_WARNING "vio: driver registration failed\n");
+		platform_device_unregister(vio_platform_device);
+	}
+	
+	return retval;
+}
+
+static void __exit vio_exit(void)
+{
+	platform_driver_unregister(&vio_driver);
+	platform_device_unregister(vio_platform_device);
+}
+
+module_init(vio_init);
+module_exit(vio_exit);
+
+MODULE_AUTHOR("Hamish Guthrie <hamish@prodigi.ch>");
+MODULE_DESCRIPTION("FDL Versalink GPIO Driver");
+MODULE_LICENSE("GPL");
--- linux-2.6.25.10.old/include/asm-arm/arch-at91/gpio.h	2008-07-03 05:46:47.000000000 +0200
+++ linux-2.6.25.10/include/asm-arm/arch-at91/gpio.h	2008-07-07 17:03:03.000000000 +0200
@@ -199,6 +199,7 @@
 /* callable at any time */
 extern int at91_set_gpio_value(unsigned pin, int value);
 extern int at91_get_gpio_value(unsigned pin);
+extern int at91_is_pin_gpio(unsigned pin);
 
 /* callable only from core power-management code */
 extern void at91_gpio_suspend(void);