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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/drivers/mfd/max77620.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Maxim MAX77620 MFD Driver
34  *
....@@ -7,10 +8,6 @@
78  *	Laxman Dewangan <ldewangan@nvidia.com>
89  *	Chaitanya Bandi <bandik@nvidia.com>
910  *	Mallikarjun Kasoju <mkasoju@nvidia.com>
10
- *
11
- * This program is free software; you can redistribute it and/or modify
12
- * it under the terms of the GNU General Public License version 2 as
13
- * published by the Free Software Foundation.
1411  */
1512 
1613 /****************** Teminology used in driver ********************
....@@ -36,6 +33,8 @@
3633 #include <linux/of_device.h>
3734 #include <linux/regmap.h>
3835 #include <linux/slab.h>
36
+
37
+static struct max77620_chip *max77620_scratch;
3938 
4039 static const struct resource gpio_resources[] = {
4140 	DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
....@@ -111,6 +110,26 @@
111110 	},
112111 };
113112 
113
+static const struct mfd_cell max77663_children[] = {
114
+	{ .name = "max77620-pinctrl", },
115
+	{ .name = "max77620-clock", },
116
+	{ .name = "max77663-pmic", },
117
+	{ .name = "max77620-watchdog", },
118
+	{
119
+		.name = "max77620-gpio",
120
+		.resources = gpio_resources,
121
+		.num_resources = ARRAY_SIZE(gpio_resources),
122
+	}, {
123
+		.name = "max77620-rtc",
124
+		.resources = rtc_resources,
125
+		.num_resources = ARRAY_SIZE(rtc_resources),
126
+	}, {
127
+		.name = "max77663-power",
128
+		.resources = power_resources,
129
+		.num_resources = ARRAY_SIZE(power_resources),
130
+	},
131
+};
132
+
114133 static const struct regmap_range max77620_readable_ranges[] = {
115134 	regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
116135 };
....@@ -158,6 +177,7 @@
158177 	.rd_table = &max77620_readable_table,
159178 	.wr_table = &max77620_writable_table,
160179 	.volatile_table = &max77620_volatile_table,
180
+	.use_single_write = true,
161181 };
162182 
163183 static const struct regmap_config max20024_regmap_config = {
....@@ -168,6 +188,35 @@
168188 	.cache_type = REGCACHE_RBTREE,
169189 	.rd_table = &max20024_readable_table,
170190 	.wr_table = &max77620_writable_table,
191
+	.volatile_table = &max77620_volatile_table,
192
+};
193
+
194
+static const struct regmap_range max77663_readable_ranges[] = {
195
+	regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
196
+};
197
+
198
+static const struct regmap_access_table max77663_readable_table = {
199
+	.yes_ranges = max77663_readable_ranges,
200
+	.n_yes_ranges = ARRAY_SIZE(max77663_readable_ranges),
201
+};
202
+
203
+static const struct regmap_range max77663_writable_ranges[] = {
204
+	regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
205
+};
206
+
207
+static const struct regmap_access_table max77663_writable_table = {
208
+	.yes_ranges = max77663_writable_ranges,
209
+	.n_yes_ranges = ARRAY_SIZE(max77663_writable_ranges),
210
+};
211
+
212
+static const struct regmap_config max77663_regmap_config = {
213
+	.name = "power-slave",
214
+	.reg_bits = 8,
215
+	.val_bits = 8,
216
+	.max_register = MAX77620_REG_CID5 + 1,
217
+	.cache_type = REGCACHE_RBTREE,
218
+	.rd_table = &max77663_readable_table,
219
+	.wr_table = &max77663_writable_table,
171220 	.volatile_table = &max77620_volatile_table,
172221 };
173222 
....@@ -240,6 +289,9 @@
240289 	case MAX77620:
241290 		fps_min_period = MAX77620_FPS_PERIOD_MIN_US;
242291 		break;
292
+	case MAX77663:
293
+		fps_min_period = MAX20024_FPS_PERIOD_MIN_US;
294
+		break;
243295 	default:
244296 		return -EINVAL;
245297 	}
....@@ -274,18 +326,21 @@
274326 	case MAX77620:
275327 		fps_max_period = MAX77620_FPS_PERIOD_MAX_US;
276328 		break;
329
+	case MAX77663:
330
+		fps_max_period = MAX20024_FPS_PERIOD_MAX_US;
331
+		break;
277332 	default:
278333 		return -EINVAL;
279334 	}
280335 
281336 	for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) {
282337 		sprintf(fps_name, "fps%d", fps_id);
283
-		if (!strcmp(fps_np->name, fps_name))
338
+		if (of_node_name_eq(fps_np, fps_name))
284339 			break;
285340 	}
286341 
287342 	if (fps_id == MAX77620_FPS_COUNT) {
288
-		dev_err(dev, "FPS node name %s is not valid\n", fps_np->name);
343
+		dev_err(dev, "FPS node name %pOFn is not valid\n", fps_np);
289344 		return -EINVAL;
290345 	}
291346 
....@@ -362,9 +417,13 @@
362417 
363418 	for_each_child_of_node(fps_np, fps_child) {
364419 		ret = max77620_config_fps(chip, fps_child);
365
-		if (ret < 0)
420
+		if (ret < 0) {
421
+			of_node_put(fps_child);
422
+			of_node_put(fps_np);
366423 			return ret;
424
+		}
367425 	}
426
+	of_node_put(fps_np);
368427 
369428 	config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0;
370429 	ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
....@@ -375,6 +434,9 @@
375434 	}
376435 
377436 skip_fps:
437
+	if (chip->chip_id == MAX77663)
438
+		return 0;
439
+
378440 	/* Enable wake on EN0 pin */
379441 	ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
380442 				 MAX77620_ONOFFCNFG2_WK_EN0,
....@@ -423,6 +485,15 @@
423485 	return ret;
424486 }
425487 
488
+static void max77620_pm_power_off(void)
489
+{
490
+	struct max77620_chip *chip = max77620_scratch;
491
+
492
+	regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
493
+			   MAX77620_ONOFFCNFG1_SFT_RST,
494
+			   MAX77620_ONOFFCNFG1_SFT_RST);
495
+}
496
+
426497 static int max77620_probe(struct i2c_client *client,
427498 			  const struct i2c_device_id *id)
428499 {
....@@ -430,6 +501,7 @@
430501 	struct max77620_chip *chip;
431502 	const struct mfd_cell *mfd_cells;
432503 	int n_mfd_cells;
504
+	bool pm_off;
433505 	int ret;
434506 
435507 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
....@@ -438,7 +510,6 @@
438510 
439511 	i2c_set_clientdata(client, chip);
440512 	chip->dev = &client->dev;
441
-	chip->irq_base = -1;
442513 	chip->chip_irq = client->irq;
443514 	chip->chip_id = (enum max77620_chip_id)id->driver_data;
444515 
....@@ -452,6 +523,11 @@
452523 		mfd_cells = max20024_children;
453524 		n_mfd_cells = ARRAY_SIZE(max20024_children);
454525 		rmap_config = &max20024_regmap_config;
526
+		break;
527
+	case MAX77663:
528
+		mfd_cells = max77663_children;
529
+		n_mfd_cells = ARRAY_SIZE(max77663_children);
530
+		rmap_config = &max77663_regmap_config;
455531 		break;
456532 	default:
457533 		dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id);
....@@ -471,8 +547,8 @@
471547 
472548 	max77620_top_irq_chip.irq_drv_data = chip;
473549 	ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq,
474
-				       IRQF_ONESHOT | IRQF_SHARED,
475
-				       chip->irq_base, &max77620_top_irq_chip,
550
+				       IRQF_ONESHOT | IRQF_SHARED, 0,
551
+				       &max77620_top_irq_chip,
476552 				       &chip->top_irq_data);
477553 	if (ret < 0) {
478554 		dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret);
....@@ -489,6 +565,12 @@
489565 	if (ret < 0) {
490566 		dev_err(chip->dev, "Failed to add MFD children: %d\n", ret);
491567 		return ret;
568
+	}
569
+
570
+	pm_off = of_device_is_system_power_controller(client->dev.of_node);
571
+	if (pm_off && !pm_power_off) {
572
+		max77620_scratch = chip;
573
+		pm_power_off = max77620_pm_power_off;
492574 	}
493575 
494576 	return 0;
....@@ -546,6 +628,9 @@
546628 		return ret;
547629 	}
548630 
631
+	if (chip->chip_id == MAX77663)
632
+		goto out;
633
+
549634 	/* Disable WK_EN0 */
550635 	ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
551636 				 MAX77620_ONOFFCNFG2_WK_EN0, 0);
....@@ -581,7 +666,7 @@
581666 	 * For MAX20024: No need to configure WKEN0 on resume as
582667 	 * it is configured on Init.
583668 	 */
584
-	if (chip->chip_id == MAX20024)
669
+	if (chip->chip_id == MAX20024 || chip->chip_id == MAX77663)
585670 		goto out;
586671 
587672 	/* Enable WK_EN0 */
....@@ -603,6 +688,7 @@
603688 static const struct i2c_device_id max77620_id[] = {
604689 	{"max77620", MAX77620},
605690 	{"max20024", MAX20024},
691
+	{"max77663", MAX77663},
606692 	{},
607693 };
608694