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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/arch/arm/mach-omap1/board-ams-delta.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * linux/arch/arm/mach-omap1/board-ams-delta.c
34  *
....@@ -6,19 +7,18 @@
67  * Board specific inits for the Amstrad E3 (codename Delta) videophone
78  *
89  * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
9
- *
10
- * This program is free software; you can redistribute it and/or modify
11
- * it under the terms of the GNU General Public License version 2 as
12
- * published by the Free Software Foundation.
1310  */
1411 #include <linux/gpio/driver.h>
1512 #include <linux/gpio/machine.h>
13
+#include <linux/gpio/consumer.h>
1614 #include <linux/gpio.h>
1715 #include <linux/kernel.h>
1816 #include <linux/init.h>
1917 #include <linux/input.h>
2018 #include <linux/interrupt.h>
2119 #include <linux/leds.h>
20
+#include <linux/mtd/nand-gpio.h>
21
+#include <linux/mtd/partitions.h>
2222 #include <linux/platform_device.h>
2323 #include <linux/regulator/consumer.h>
2424 #include <linux/regulator/fixed.h>
....@@ -29,22 +29,19 @@
2929 #include <linux/io.h>
3030 #include <linux/platform_data/gpio-omap.h>
3131 
32
-#include <media/soc_camera.h>
33
-
3432 #include <asm/serial.h>
3533 #include <asm/mach-types.h>
3634 #include <asm/mach/arch.h>
3735 #include <asm/mach/map.h>
3836 
39
-#include <mach/board-ams-delta.h>
4037 #include <linux/platform_data/keypad-omap.h>
4138 #include <mach/mux.h>
4239 
4340 #include <mach/hardware.h>
44
-#include "camera.h"
4541 #include <mach/usb.h>
4642 
4743 #include "ams-delta-fiq.h"
44
+#include "board-ams-delta.h"
4845 #include "iomap.h"
4946 #include "common.h"
5047 
....@@ -167,7 +164,6 @@
167164 	.pins[0]	= 2,
168165 };
169166 
170
-#define LATCH1_GPIO_BASE	232
171167 #define LATCH1_NGPIO		8
172168 
173169 static struct resource latch1_resources[] = {
....@@ -183,7 +179,7 @@
183179 
184180 static struct bgpio_pdata latch1_pdata = {
185181 	.label	= LATCH1_LABEL,
186
-	.base	= LATCH1_GPIO_BASE,
182
+	.base	= -1,
187183 	.ngpio	= LATCH1_NGPIO,
188184 };
189185 
....@@ -206,11 +202,13 @@
206202 #define LATCH1_PIN_DOCKIT1		6
207203 #define LATCH1_PIN_DOCKIT2		7
208204 
205
+#define LATCH2_NGPIO			16
206
+
209207 static struct resource latch2_resources[] = {
210208 	[0] = {
211209 		.name	= "dat",
212210 		.start	= LATCH2_PHYS,
213
-		.end	= LATCH2_PHYS + (AMS_DELTA_LATCH2_NGPIO - 1) / 8,
211
+		.end	= LATCH2_PHYS + (LATCH2_NGPIO - 1) / 8,
214212 		.flags	= IORESOURCE_MEM,
215213 	},
216214 };
....@@ -219,8 +217,8 @@
219217 
220218 static struct bgpio_pdata latch2_pdata = {
221219 	.label	= LATCH2_LABEL,
222
-	.base	= AMS_DELTA_LATCH2_GPIO_BASE,
223
-	.ngpio	= AMS_DELTA_LATCH2_NGPIO,
220
+	.base	= -1,
221
+	.ngpio	= LATCH2_NGPIO,
224222 };
225223 
226224 static struct platform_device latch2_gpio_device = {
....@@ -247,41 +245,8 @@
247245 #define LATCH2_PIN_SCARD_CMDVCC		11
248246 #define LATCH2_PIN_MODEM_NRESET		12
249247 #define LATCH2_PIN_MODEM_CODEC		13
250
-#define LATCH2_PIN_HOOKFLASH1		14
251
-#define LATCH2_PIN_HOOKFLASH2		15
252
-
253
-static const struct gpio latch_gpios[] __initconst = {
254
-	{
255
-		.gpio	= LATCH1_GPIO_BASE + 6,
256
-		.flags	= GPIOF_OUT_INIT_LOW,
257
-		.label	= "dockit1",
258
-	},
259
-	{
260
-		.gpio	= LATCH1_GPIO_BASE + 7,
261
-		.flags	= GPIOF_OUT_INIT_LOW,
262
-		.label	= "dockit2",
263
-	},
264
-	{
265
-		.gpio	= AMS_DELTA_GPIO_PIN_SCARD_RSTIN,
266
-		.flags	= GPIOF_OUT_INIT_LOW,
267
-		.label	= "scard_rstin",
268
-	},
269
-	{
270
-		.gpio	= AMS_DELTA_GPIO_PIN_SCARD_CMDVCC,
271
-		.flags	= GPIOF_OUT_INIT_LOW,
272
-		.label	= "scard_cmdvcc",
273
-	},
274
-	{
275
-		.gpio	= AMS_DELTA_LATCH2_GPIO_BASE + 14,
276
-		.flags	= GPIOF_OUT_INIT_LOW,
277
-		.label	= "hookflash1",
278
-	},
279
-	{
280
-		.gpio	= AMS_DELTA_LATCH2_GPIO_BASE + 15,
281
-		.flags	= GPIOF_OUT_INIT_LOW,
282
-		.label	= "hookflash2",
283
-	},
284
-};
248
+#define LATCH2_PIN_HANDSFREE_MUTE	14
249
+#define LATCH2_PIN_HANDSET_MUTE		15
285250 
286251 static struct regulator_consumer_supply modem_nreset_consumers[] = {
287252 	REGULATOR_SUPPLY("RESET#", "serial8250.1"),
....@@ -300,9 +265,7 @@
300265 static struct fixed_voltage_config modem_nreset_config = {
301266 	.supply_name		= "modem_nreset",
302267 	.microvolts		= 3300000,
303
-	.gpio			= AMS_DELTA_GPIO_PIN_MODEM_NRESET,
304268 	.startup_delay		= 25000,
305
-	.enable_high		= 1,
306269 	.enabled_at_boot	= 1,
307270 	.init_data		= &modem_nreset_data,
308271 };
....@@ -315,54 +278,84 @@
315278 	},
316279 };
317280 
281
+static struct gpiod_lookup_table ams_delta_nreset_gpiod_table = {
282
+	.dev_id = "reg-fixed-voltage",
283
+	.table = {
284
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_MODEM_NRESET,
285
+			    NULL, GPIO_ACTIVE_HIGH),
286
+		{ },
287
+	},
288
+};
289
+
318290 struct modem_private_data {
319291 	struct regulator *regulator;
320292 };
321293 
322294 static struct modem_private_data modem_priv;
323295 
324
-void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value)
325
-{
326
-	int bit = 0;
327
-	u16 bitpos = 1 << bit;
296
+/*
297
+ * Define partitions for flash device
298
+ */
328299 
329
-	for (; bit < ngpio; bit++, bitpos = bitpos << 1) {
330
-		if (!(mask & bitpos))
331
-			continue;
332
-		else
333
-			gpio_set_value(base + bit, (value & bitpos) != 0);
334
-	}
335
-}
336
-EXPORT_SYMBOL(ams_delta_latch_write);
300
+static struct mtd_partition partition_info[] = {
301
+	{ .name		= "Kernel",
302
+	  .offset	= 0,
303
+	  .size		= 3 * SZ_1M + SZ_512K },
304
+	{ .name		= "u-boot",
305
+	  .offset	= 3 * SZ_1M + SZ_512K,
306
+	  .size		= SZ_256K },
307
+	{ .name		= "u-boot params",
308
+	  .offset	= 3 * SZ_1M + SZ_512K + SZ_256K,
309
+	  .size		= SZ_256K },
310
+	{ .name		= "Amstrad LDR",
311
+	  .offset	= 4 * SZ_1M,
312
+	  .size		= SZ_256K },
313
+	{ .name		= "File system",
314
+	  .offset	= 4 * SZ_1M + 1 * SZ_256K,
315
+	  .size		= 27 * SZ_1M },
316
+	{ .name		= "PBL reserved",
317
+	  .offset	= 32 * SZ_1M - 3 * SZ_256K,
318
+	  .size		=  3 * SZ_256K },
319
+};
337320 
338
-static struct resource ams_delta_nand_resources[] = {
339
-	[0] = {
340
-		.start	= OMAP1_MPUIO_BASE,
341
-		.end	= OMAP1_MPUIO_BASE +
342
-				OMAP_MPUIO_IO_CNTL + sizeof(u32) - 1,
343
-		.flags	= IORESOURCE_MEM,
344
-	},
321
+static struct gpio_nand_platdata nand_platdata = {
322
+	.parts		= partition_info,
323
+	.num_parts	= ARRAY_SIZE(partition_info),
345324 };
346325 
347326 static struct platform_device ams_delta_nand_device = {
348327 	.name	= "ams-delta-nand",
349328 	.id	= -1,
350
-	.num_resources	= ARRAY_SIZE(ams_delta_nand_resources),
351
-	.resource	= ams_delta_nand_resources,
329
+	.dev	= {
330
+		.platform_data = &nand_platdata,
331
+	},
352332 };
353333 
354
-#define OMAP_GPIO_LABEL	"gpio-0-15"
334
+#define OMAP_GPIO_LABEL		"gpio-0-15"
335
+#define OMAP_MPUIO_LABEL	"mpuio"
355336 
356337 static struct gpiod_lookup_table ams_delta_nand_gpio_table = {
357338 	.table = {
358339 		GPIO_LOOKUP(OMAP_GPIO_LABEL, AMS_DELTA_GPIO_PIN_NAND_RB, "rdy",
359340 			    0),
360
-		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NCE, "nce", 0),
361
-		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NRE, "nre", 0),
362
-		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWP, "nwp", 0),
363
-		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe", 0),
341
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NCE, "nce",
342
+			    GPIO_ACTIVE_LOW),
343
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NRE, "nre",
344
+			    GPIO_ACTIVE_LOW),
345
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWP, "nwp",
346
+			    GPIO_ACTIVE_LOW),
347
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe",
348
+			    GPIO_ACTIVE_LOW),
364349 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_ALE, "ale", 0),
365350 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_CLE, "cle", 0),
351
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 0, "data", 0, 0),
352
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 1, "data", 1, 0),
353
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 2, "data", 2, 0),
354
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 3, "data", 3, 0),
355
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 4, "data", 4, 0),
356
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 5, "data", 5, 0),
357
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 6, "data", 6, 0),
358
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 7, "data", 7, 0),
366359 		{ },
367360 	},
368361 };
....@@ -410,15 +403,9 @@
410403 	},
411404 };
412405 
413
-/*
414
- * Dynamically allocated GPIO numbers must be obtained fromm GPIO device
415
- * before they can be put in the gpio_led table.  Before that happens,
416
- * initialize the table with invalid GPIO numbers, not 0.
417
- */
418406 static struct gpio_led gpio_leds[] __initdata = {
419407 	[LATCH1_PIN_LED_CAMERA] = {
420408 		.name		 = "camera",
421
-		.gpio		 = -EINVAL,
422409 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
423410 #ifdef CONFIG_LEDS_TRIGGERS
424411 		.default_trigger = "ams_delta_camera",
....@@ -426,27 +413,22 @@
426413 	},
427414 	[LATCH1_PIN_LED_ADVERT] = {
428415 		.name		 = "advert",
429
-		.gpio		 = -EINVAL,
430416 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
431417 	},
432418 	[LATCH1_PIN_LED_MAIL] = {
433419 		.name		 = "email",
434
-		.gpio		 = -EINVAL,
435420 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
436421 	},
437422 	[LATCH1_PIN_LED_HANDSFREE] = {
438423 		.name		 = "handsfree",
439
-		.gpio		 = -EINVAL,
440424 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
441425 	},
442426 	[LATCH1_PIN_LED_VOICEMAIL] = {
443427 		.name		 = "voicemail",
444
-		.gpio		 = -EINVAL,
445428 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
446429 	},
447430 	[LATCH1_PIN_LED_VOICE] = {
448431 		.name		 = "voice",
449
-		.gpio		 = -EINVAL,
450432 		.default_state	 = LEDS_GPIO_DEFSTATE_OFF,
451433 	},
452434 };
....@@ -456,50 +438,27 @@
456438 	.num_leds	= ARRAY_SIZE(gpio_leds),
457439 };
458440 
459
-static struct i2c_board_info ams_delta_camera_board_info[] = {
460
-	{
461
-		I2C_BOARD_INFO("ov6650", 0x60),
441
+static struct gpiod_lookup_table leds_gpio_table = {
442
+	.table = {
443
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_CAMERA, NULL,
444
+				LATCH1_PIN_LED_CAMERA, 0),
445
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_ADVERT, NULL,
446
+				LATCH1_PIN_LED_ADVERT, 0),
447
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_MAIL, NULL,
448
+				LATCH1_PIN_LED_MAIL, 0),
449
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_HANDSFREE, NULL,
450
+				LATCH1_PIN_LED_HANDSFREE, 0),
451
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_VOICEMAIL, NULL,
452
+				LATCH1_PIN_LED_VOICEMAIL, 0),
453
+		GPIO_LOOKUP_IDX(LATCH1_LABEL, LATCH1_PIN_LED_VOICE, NULL,
454
+				LATCH1_PIN_LED_VOICE, 0),
455
+		{ },
462456 	},
463457 };
464458 
465459 #ifdef CONFIG_LEDS_TRIGGERS
466460 DEFINE_LED_TRIGGER(ams_delta_camera_led_trigger);
467
-
468
-static int ams_delta_camera_power(struct device *dev, int power)
469
-{
470
-	/*
471
-	 * turn on camera LED
472
-	 */
473
-	if (power)
474
-		led_trigger_event(ams_delta_camera_led_trigger, LED_FULL);
475
-	else
476
-		led_trigger_event(ams_delta_camera_led_trigger, LED_OFF);
477
-	return 0;
478
-}
479
-#else
480
-#define ams_delta_camera_power	NULL
481461 #endif
482
-
483
-static struct soc_camera_link ams_delta_iclink = {
484
-	.bus_id         = 0,	/* OMAP1 SoC camera bus */
485
-	.i2c_adapter_id = 1,
486
-	.board_info     = &ams_delta_camera_board_info[0],
487
-	.module_name    = "ov6650",
488
-	.power		= ams_delta_camera_power,
489
-};
490
-
491
-static struct platform_device ams_delta_camera_device = {
492
-	.name   = "soc-camera-pdrv",
493
-	.id     = 0,
494
-	.dev    = {
495
-		.platform_data = &ams_delta_iclink,
496
-	},
497
-};
498
-
499
-static struct omap1_cam_platform_data ams_delta_camera_platform_data = {
500
-	.camexclk_khz	= 12000,	/* default 12MHz clock, no extra DPLL */
501
-	.lclk_khz_max	= 1334,		/* results in 5fps CIF, 10fps QCIF */
502
-};
503462 
504463 static struct platform_device ams_delta_audio_device = {
505464 	.name   = "ams-delta-audio",
....@@ -512,6 +471,10 @@
512471 			    "hook_switch", 0),
513472 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_MODEM_CODEC,
514473 			    "modem_codec", 0),
474
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_HANDSFREE_MUTE,
475
+			    "handsfree_mute", 0),
476
+		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_HANDSET_MUTE,
477
+			    "handset_mute", 0),
515478 		{ },
516479 	},
517480 };
....@@ -568,8 +531,6 @@
568531 static struct fixed_voltage_config keybrd_pwr_config = {
569532 	.supply_name		= "keybrd_pwr",
570533 	.microvolts		= 5000000,
571
-	.gpio			= AMS_DELTA_GPIO_PIN_KEYBRD_PWR,
572
-	.enable_high		= 1,
573534 	.init_data		= &keybrd_pwr_initdata,
574535 };
575536 
....@@ -593,7 +554,6 @@
593554 	&latch1_gpio_device,
594555 	&latch2_gpio_device,
595556 	&ams_delta_kp_device,
596
-	&ams_delta_camera_device,
597557 	&ams_delta_audio_device,
598558 	&ams_delta_serio_device,
599559 	&ams_delta_nand_device,
....@@ -602,6 +562,7 @@
602562 };
603563 
604564 static struct gpiod_lookup_table *ams_delta_gpio_tables[] __initdata = {
565
+	&ams_delta_nreset_gpiod_table,
605566 	&ams_delta_audio_gpio_table,
606567 	&keybrd_pwr_gpio_table,
607568 	&ams_delta_lcd_gpio_table,
....@@ -630,6 +591,28 @@
630591 	{},
631592 };
632593 
594
+static struct plat_serial8250_port ams_delta_modem_ports[];
595
+
596
+/*
597
+ * Obtain MODEM IRQ GPIO descriptor using its hardware pin
598
+ * number and assign related IRQ number to the MODEM port.
599
+ * Keep the GPIO descriptor open so nobody steps in.
600
+ */
601
+static void __init modem_assign_irq(struct gpio_chip *chip)
602
+{
603
+	struct gpio_desc *gpiod;
604
+
605
+	gpiod = gpiochip_request_own_desc(chip, AMS_DELTA_GPIO_PIN_MODEM_IRQ,
606
+					  "modem_irq", GPIO_ACTIVE_HIGH,
607
+					  GPIOD_IN);
608
+	if (IS_ERR(gpiod)) {
609
+		pr_err("%s: modem IRQ GPIO request failed (%ld)\n", __func__,
610
+		       PTR_ERR(gpiod));
611
+	} else {
612
+		ams_delta_modem_ports[0].irq = gpiod_to_irq(gpiod);
613
+	}
614
+}
615
+
633616 /*
634617  * The purpose of this function is to take care of proper initialization of
635618  * devices and data structures which depend on GPIO lines provided by OMAP GPIO
....@@ -649,11 +632,53 @@
649632 		return;
650633 	}
651634 
635
+	/*
636
+	 * Start with FIQ initialization as it may have to request
637
+	 * and release successfully each OMAP GPIO pin in turn.
638
+	 */
652639 	ams_delta_init_fiq(chip, &ams_delta_serio_device);
640
+
641
+	modem_assign_irq(chip);
642
+}
643
+
644
+/*
645
+ * Initialize latch2 pins with values which are safe for dependent on-board
646
+ * devices or useful for their successull initialization even before GPIO
647
+ * driver takes control over the latch pins:
648
+ * - LATCH2_PIN_LCD_VBLEN	= 0
649
+ * - LATCH2_PIN_LCD_NDISP	= 0	Keep LCD device powered off before its
650
+ *					driver takes control over it.
651
+ * - LATCH2_PIN_NAND_NCE	= 0
652
+ * - LATCH2_PIN_NAND_NWP	= 0	Keep NAND device down and write-
653
+ *					protected before its driver takes
654
+ *					control over it.
655
+ * - LATCH2_PIN_KEYBRD_PWR	= 0	Keep keyboard powered off before serio
656
+ *					driver takes control over it.
657
+ * - LATCH2_PIN_KEYBRD_DATAOUT	= 0	Keep low to avoid corruption of first
658
+ *					byte of data received from attached
659
+ *					keyboard when serio device is probed;
660
+ *					the pin is also hogged low by the latch2
661
+ *					GPIO driver as soon as it is ready.
662
+ * - LATCH2_PIN_MODEM_NRESET	= 1	Enable voice MODEM device, allowing for
663
+ *					its successful probe even before a
664
+ *					regulator it depends on, which in turn
665
+ *					takes control over the pin, is set up.
666
+ * - LATCH2_PIN_MODEM_CODEC	= 1	Attach voice MODEM CODEC data port
667
+ *					to the MODEM so the CODEC is under
668
+ *					control even if audio driver doesn't
669
+ *					take it over.
670
+ */
671
+static void __init ams_delta_latch2_init(void)
672
+{
673
+	u16 latch2 = 1 << LATCH2_PIN_MODEM_NRESET | 1 << LATCH2_PIN_MODEM_CODEC;
674
+
675
+	__raw_writew(latch2, LATCH2_VIRT);
653676 }
654677 
655678 static void __init ams_delta_init(void)
656679 {
680
+	struct platform_device *leds_pdev;
681
+
657682 	/* mux pins for uarts */
658683 	omap_cfg_reg(UART1_TX);
659684 	omap_cfg_reg(UART1_RTS);
....@@ -673,13 +698,13 @@
673698 	omap_cfg_reg(J18_1610_CAM_D7);
674699 
675700 	omap_gpio_deps_init();
701
+	ams_delta_latch2_init();
676702 	gpiod_add_hogs(ams_delta_gpio_hogs);
677703 
678704 	omap_serial_init();
679705 	omap_register_i2c_bus(1, 100, NULL, 0);
680706 
681707 	omap1_usb_init(&ams_delta_usb_config);
682
-	omap1_set_camera_info(&ams_delta_camera_platform_data);
683708 #ifdef CONFIG_LEDS_TRIGGERS
684709 	led_trigger_register_simple("ams_delta_camera",
685710 			&ams_delta_camera_led_trigger);
....@@ -715,6 +740,12 @@
715740 	 */
716741 	gpiod_add_lookup_tables(ams_delta_gpio_tables,
717742 				ARRAY_SIZE(ams_delta_gpio_tables));
743
+
744
+	leds_pdev = gpio_led_register_device(PLATFORM_DEVID_NONE, &leds_pdata);
745
+	if (!IS_ERR_OR_NULL(leds_pdev)) {
746
+		leds_gpio_table.dev_id = dev_name(&leds_pdev->dev);
747
+		gpiod_add_lookup_table(&leds_gpio_table);
748
+	}
718749 
719750 	omap_writew(omap_readw(ARM_RSTCT1) | 0x0004, ARM_RSTCT1);
720751 
....@@ -752,7 +783,7 @@
752783 	{
753784 		.membase	= IOMEM(MODEM_VIRT),
754785 		.mapbase	= MODEM_PHYS,
755
-		.irq		= -EINVAL, /* changed later */
786
+		.irq		= IRQ_NOTCONNECTED, /* changed later */
756787 		.flags		= UPF_BOOT_AUTOCONF,
757788 		.irqflags	= IRQF_TRIGGER_RISING,
758789 		.iotype		= UPIO_MEM,
....@@ -772,69 +803,6 @@
772803 	},
773804 };
774805 
775
-/*
776
- * leds-gpio driver doesn't make use of GPIO lookup tables,
777
- * it has to be provided with GPIO numbers over platform data
778
- * if GPIO descriptor info can't be obtained from device tree.
779
- * We could either define GPIO lookup tables and use them on behalf
780
- * of the leds-gpio device, or we can use GPIO driver level methods
781
- * for identification of GPIO numbers as long as we don't support
782
- * device tree.  Let's do the latter.
783
- */
784
-static void __init ams_delta_led_init(struct gpio_chip *chip)
785
-{
786
-	struct gpio_desc *gpiod;
787
-	int i;
788
-
789
-	for (i = LATCH1_PIN_LED_CAMERA; i < LATCH1_PIN_DOCKIT1; i++) {
790
-		gpiod = gpiochip_request_own_desc(chip, i, NULL);
791
-		if (IS_ERR(gpiod)) {
792
-			pr_warn("%s: %s GPIO %d request failed (%ld)\n",
793
-				__func__, LATCH1_LABEL, i, PTR_ERR(gpiod));
794
-			continue;
795
-		}
796
-
797
-		/* Assign GPIO numbers to LED device. */
798
-		gpio_leds[i].gpio = desc_to_gpio(gpiod);
799
-
800
-		gpiochip_free_own_desc(gpiod);
801
-	}
802
-
803
-	gpio_led_register_device(PLATFORM_DEVID_NONE, &leds_pdata);
804
-}
805
-
806
-/*
807
- * The purpose of this function is to take care of assignment of GPIO numbers
808
- * to platform devices which depend on GPIO lines provided by Amstrad Delta
809
- * latch1 and/or latch2 GPIO devices but don't use GPIO lookup tables.
810
- * The function may be called as soon as latch1/latch2 GPIO devices are
811
- * initilized.  Since basic-mmio-gpio driver is not registered before
812
- * device_initcall, this may happen at erliest during device_initcall_sync.
813
- * Dependent devices shouldn't be registered before that, their
814
- * registration may be performed from within this function or later.
815
- */
816
-static int __init ams_delta_gpio_init(void)
817
-{
818
-	struct gpio_chip *chip;
819
-	int err;
820
-
821
-	if (!machine_is_ams_delta())
822
-		return -ENODEV;
823
-
824
-	chip = gpiochip_find(LATCH1_LABEL, gpiochip_match_by_label);
825
-	if (!chip)
826
-		pr_err("%s: latch1 GPIO chip not found\n", __func__);
827
-	else
828
-		ams_delta_led_init(chip);
829
-
830
-	err = gpio_request_array(latch_gpios, ARRAY_SIZE(latch_gpios));
831
-	if (err)
832
-		pr_err("Couldn't take over latch1/latch2 GPIO pins\n");
833
-
834
-	return err;
835
-}
836
-device_initcall_sync(ams_delta_gpio_init);
837
-
838806 static int __init modem_nreset_init(void)
839807 {
840808 	int err;
....@@ -847,43 +815,46 @@
847815 }
848816 
849817 
818
+/*
819
+ * This function expects MODEM IRQ number already assigned to the port.
820
+ * The MODEM device requires its RESET# pin kept high during probe.
821
+ * That requirement can be fulfilled in several ways:
822
+ * - with a descriptor of already functional modem_nreset regulator
823
+ *   assigned to the MODEM private data,
824
+ * - with the regulator not yet controlled by modem_pm function but
825
+ *   already enabled by default on probe,
826
+ * - before the modem_nreset regulator is probed, with the pin already
827
+ *   set high explicitly.
828
+ * The last one is already guaranteed by ams_delta_latch2_init() called
829
+ * from machine_init.
830
+ * In order to avoid taking over ttyS0 device slot, the MODEM device
831
+ * should be registered after OMAP serial ports.  Since those ports
832
+ * are registered at arch_initcall, this function can be called safely
833
+ * at arch_initcall_sync earliest.
834
+ */
850835 static int __init ams_delta_modem_init(void)
851836 {
852837 	int err;
853838 
854
-	omap_cfg_reg(M14_1510_GPIO2);
855
-	ams_delta_modem_ports[0].irq =
856
-			gpio_to_irq(AMS_DELTA_GPIO_PIN_MODEM_IRQ);
839
+	if (!machine_is_ams_delta())
840
+		return -ENODEV;
857841 
858
-	err = gpio_request(AMS_DELTA_GPIO_PIN_MODEM_IRQ, "modem");
859
-	if (err) {
860
-		pr_err("Couldn't request gpio pin for modem\n");
861
-		return err;
862
-	}
863
-	gpio_direction_input(AMS_DELTA_GPIO_PIN_MODEM_IRQ);
842
+	omap_cfg_reg(M14_1510_GPIO2);
864843 
865844 	/* Initialize the modem_nreset regulator consumer before use */
866845 	modem_priv.regulator = ERR_PTR(-ENODEV);
867846 
868
-	ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC,
869
-			AMS_DELTA_LATCH2_MODEM_CODEC);
870
-
871847 	err = platform_device_register(&ams_delta_modem_device);
872
-	if (err)
873
-		gpio_free(AMS_DELTA_GPIO_PIN_MODEM_IRQ);
874848 
875849 	return err;
876850 }
851
+arch_initcall_sync(ams_delta_modem_init);
877852 
878853 static int __init late_init(void)
879854 {
880855 	int err;
881856 
882857 	err = modem_nreset_init();
883
-	if (err)
884
-		return err;
885
-
886
-	err = ams_delta_modem_init();
887858 	if (err)
888859 		return err;
889860 
....@@ -901,7 +872,6 @@
901872 
902873 unregister:
903874 	platform_device_unregister(&ams_delta_modem_device);
904
-	gpio_free(AMS_DELTA_GPIO_PIN_MODEM_IRQ);
905875 	return err;
906876 }
907877