summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/rohm-bd70528.c
blob: 5c44d3b77b3e1c62afa1cd27fa3741409fbd50c3 (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
// SPDX-License-Identifier: GPL-2.0-or-later
//
// Copyright (C) 2019 ROHM Semiconductors
//
// ROHM BD70528 PMIC driver

#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rohm-bd70528.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/types.h>

#define BD70528_NUM_OF_GPIOS 4

static const struct resource rtc_irqs[] = {
	DEFINE_RES_IRQ_NAMED(BD70528_INT_RTC_ALARM, "bd70528-rtc-alm"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_ELPS_TIM, "bd70528-elapsed-timer"),
};

static const struct resource charger_irqs[] = {
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_RES, "bd70528-bat-ov-res"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_DET, "bd70528-bat-ov-det"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DBAT_DET, "bd70528-bat-dead"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_RES, "bd70528-bat-warmed"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_DET, "bd70528-bat-cold"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_RES, "bd70528-bat-cooled"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_DET, "bd70528-bat-hot"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_CHG_TSD, "bd70528-chg-tshd"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_RMV, "bd70528-bat-removed"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_DET, "bd70528-bat-detected"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_RES, "bd70528-dcin2-ov-res"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_DET, "bd70528-dcin2-ov-det"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_RMV, "bd70528-dcin2-removed"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_DET, "bd70528-dcin2-detected"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN1_RMV, "bd70528-dcin1-removed"),
	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN1_DET, "bd70528-dcin1-detected"),
};

static struct mfd_cell bd70528_mfd_cells[] = {
	{ .name = "bd70528-pmic", },
	{ .name = "bd70528-gpio", },
	/*
	 * We use BD71837 driver to drive the clock block. Only differences to
	 * BD70528 clock gate are the register address and mask.
	 */
	{ .name = "bd70528-clk", },
	{ .name = "bd70528-wdt", },
	{
		.name = "bd70528-power",
		.resources = charger_irqs,
		.num_resources = ARRAY_SIZE(charger_irqs),
	}, {
		.name = "bd70528-rtc",
		.resources = rtc_irqs,
		.num_resources = ARRAY_SIZE(rtc_irqs),
	},
};

static const struct regmap_range volatile_ranges[] = {
	{
		.range_min = BD70528_REG_INT_MAIN,
		.range_max = BD70528_REG_INT_OP_FAIL,
	}, {
		.range_min = BD70528_REG_RTC_COUNT_H,
		.range_max = BD70528_REG_RTC_ALM_REPEAT,
	}, {
		/*
		 * WDT control reg is special. Magic values must be written to
		 * it in order to change the control. Should not be cached.
		 */
		.range_min = BD70528_REG_WDT_CTRL,
		.range_max = BD70528_REG_WDT_CTRL,
	}, {
		/*
		 * BD70528 also contains a few other registers which require
		 * magic sequences to be written in order to update the value.
		 * At least SHIPMODE, HWRESET, WARMRESET,and STANDBY
		 */
		.range_min = BD70528_REG_SHIPMODE,
		.range_max = BD70528_REG_STANDBY,
	},
};

static const struct regmap_access_table volatile_regs = {
	.yes_ranges = &volatile_ranges[0],
	.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
};

static struct regmap_config bd70528_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_table = &volatile_regs,
	.max_register = BD70528_MAX_REGISTER,
	.cache_type = REGCACHE_RBTREE,
};

/*
 * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
 * access corect sub-IRQ registers based on bits that are set in main IRQ
 * register.
 */

static unsigned int bit0_offsets[] = {0};	/* Shutdown */
static unsigned int bit1_offsets[] = {1};	/* Power failure */
static unsigned int bit2_offsets[] = {2};	/* VR FAULT */
static unsigned int bit3_offsets[] = {3};	/* PMU interrupts */
static unsigned int bit4_offsets[] = {4, 5};	/* Charger 1 and Charger 2 */
static unsigned int bit5_offsets[] = {6};	/* RTC */
static unsigned int bit6_offsets[] = {7};	/* GPIO */
static unsigned int bit7_offsets[] = {8};	/* Invalid operation */

static struct regmap_irq_sub_irq_map bd70528_sub_irq_offsets[] = {
	REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
	REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
};

static struct regmap_irq bd70528_irqs[] = {
	REGMAP_IRQ_REG(BD70528_INT_LONGPUSH, 0, BD70528_INT_LONGPUSH_MASK),
	REGMAP_IRQ_REG(BD70528_INT_WDT, 0, BD70528_INT_WDT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_HWRESET, 0, BD70528_INT_HWRESET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_RSTB_FAULT, 0, BD70528_INT_RSTB_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_VBAT_UVLO, 0, BD70528_INT_VBAT_UVLO_MASK),
	REGMAP_IRQ_REG(BD70528_INT_TSD, 0, BD70528_INT_TSD_MASK),
	REGMAP_IRQ_REG(BD70528_INT_RSTIN, 0, BD70528_INT_RSTIN_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FAULT, 1,
		       BD70528_INT_BUCK1_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FAULT, 1,
		       BD70528_INT_BUCK2_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK3_FAULT, 1,
		       BD70528_INT_BUCK3_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LDO1_FAULT, 1, BD70528_INT_LDO1_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LDO2_FAULT, 1, BD70528_INT_LDO2_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LDO3_FAULT, 1, BD70528_INT_LDO3_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED1_FAULT, 1, BD70528_INT_LED1_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED2_FAULT, 1, BD70528_INT_LED2_FAULT_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK1_OCP, 2, BD70528_INT_BUCK1_OCP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK2_OCP, 2, BD70528_INT_BUCK2_OCP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK3_OCP, 2, BD70528_INT_BUCK3_OCP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED1_OCP, 2, BD70528_INT_LED1_OCP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED2_OCP, 2, BD70528_INT_LED2_OCP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FULLON, 2,
		       BD70528_INT_BUCK1_FULLON_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FULLON, 2,
		       BD70528_INT_BUCK2_FULLON_MASK),
	REGMAP_IRQ_REG(BD70528_INT_SHORTPUSH, 3, BD70528_INT_SHORTPUSH_MASK),
	REGMAP_IRQ_REG(BD70528_INT_AUTO_WAKEUP, 3,
		       BD70528_INT_AUTO_WAKEUP_MASK),
	REGMAP_IRQ_REG(BD70528_INT_STATE_CHANGE, 3,
		       BD70528_INT_STATE_CHANGE_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_RES, 4, BD70528_INT_BAT_OV_RES_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_DET, 4, BD70528_INT_BAT_OV_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DBAT_DET, 4, BD70528_INT_DBAT_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_RES, 4,
		       BD70528_INT_BATTSD_COLD_RES_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_DET, 4,
		       BD70528_INT_BATTSD_COLD_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_RES, 4,
		       BD70528_INT_BATTSD_HOT_RES_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_DET, 4,
		       BD70528_INT_BATTSD_HOT_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_CHG_TSD, 4, BD70528_INT_CHG_TSD_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BAT_RMV, 5, BD70528_INT_BAT_RMV_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BAT_DET, 5, BD70528_INT_BAT_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_RES, 5,
		       BD70528_INT_DCIN2_OV_RES_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_DET, 5,
		       BD70528_INT_DCIN2_OV_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN2_RMV, 5, BD70528_INT_DCIN2_RMV_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN2_DET, 5, BD70528_INT_DCIN2_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN1_RMV, 5, BD70528_INT_DCIN1_RMV_MASK),
	REGMAP_IRQ_REG(BD70528_INT_DCIN1_DET, 5, BD70528_INT_DCIN1_DET_MASK),
	REGMAP_IRQ_REG(BD70528_INT_RTC_ALARM, 6, BD70528_INT_RTC_ALARM_MASK),
	REGMAP_IRQ_REG(BD70528_INT_ELPS_TIM, 6, BD70528_INT_ELPS_TIM_MASK),
	REGMAP_IRQ_REG(BD70528_INT_GPIO0, 7, BD70528_INT_GPIO0_MASK),
	REGMAP_IRQ_REG(BD70528_INT_GPIO1, 7, BD70528_INT_GPIO1_MASK),
	REGMAP_IRQ_REG(BD70528_INT_GPIO2, 7, BD70528_INT_GPIO2_MASK),
	REGMAP_IRQ_REG(BD70528_INT_GPIO3, 7, BD70528_INT_GPIO3_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK1_DVS_OPFAIL, 8,
		       BD70528_INT_BUCK1_DVS_OPFAIL_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK2_DVS_OPFAIL, 8,
		       BD70528_INT_BUCK2_DVS_OPFAIL_MASK),
	REGMAP_IRQ_REG(BD70528_INT_BUCK3_DVS_OPFAIL, 8,
		       BD70528_INT_BUCK3_DVS_OPFAIL_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED1_VOLT_OPFAIL, 8,
		       BD70528_INT_LED1_VOLT_OPFAIL_MASK),
	REGMAP_IRQ_REG(BD70528_INT_LED2_VOLT_OPFAIL, 8,
		       BD70528_INT_LED2_VOLT_OPFAIL_MASK),
};

static struct regmap_irq_chip bd70528_irq_chip = {
	.name = "bd70528_irq",
	.main_status = BD70528_REG_INT_MAIN,
	.irqs = &bd70528_irqs[0],
	.num_irqs = ARRAY_SIZE(bd70528_irqs),
	.status_base = BD70528_REG_INT_SHDN,
	.mask_base = BD70528_REG_INT_SHDN_MASK,
	.ack_base = BD70528_REG_INT_SHDN,
	.type_base = BD70528_REG_GPIO1_IN,
	.init_ack_masked = true,
	.num_regs = 9,
	.num_main_regs = 1,
	.num_type_reg = 4,
	.sub_reg_offsets = &bd70528_sub_irq_offsets[0],
	.num_main_status_bits = 8,
	.irq_reg_stride = 1,
};

static int bd70528_i2c_probe(struct i2c_client *i2c,
			     const struct i2c_device_id *id)
{
	struct bd70528_data *bd70528;
	struct regmap_irq_chip_data *irq_data;
	int ret, i;

	if (!i2c->irq) {
		dev_err(&i2c->dev, "No IRQ configured\n");
		return -EINVAL;
	}

	bd70528 = devm_kzalloc(&i2c->dev, sizeof(*bd70528), GFP_KERNEL);
	if (!bd70528)
		return -ENOMEM;

	mutex_init(&bd70528->rtc_timer_lock);

	dev_set_drvdata(&i2c->dev, &bd70528->chip);

	bd70528->chip.regmap = devm_regmap_init_i2c(i2c, &bd70528_regmap);
	if (IS_ERR(bd70528->chip.regmap)) {
		dev_err(&i2c->dev, "Failed to initialize Regmap\n");
		return PTR_ERR(bd70528->chip.regmap);
	}

	/*
	 * Disallow type setting for all IRQs by default as most of them do not
	 * support setting type.
	 */
	for (i = 0; i < ARRAY_SIZE(bd70528_irqs); i++)
		bd70528_irqs[i].type.types_supported = 0;

	/* Set IRQ typesetting information for GPIO pins 0 - 3 */
	for (i = 0; i < BD70528_NUM_OF_GPIOS; i++) {
		struct regmap_irq_type *type;

		type = &bd70528_irqs[BD70528_INT_GPIO0 + i].type;
		type->type_reg_offset = 2 * i;
		type->type_rising_val = 0x20;
		type->type_falling_val = 0x10;
		type->type_level_high_val = 0x40;
		type->type_level_low_val = 0x50;
		type->types_supported = (IRQ_TYPE_EDGE_BOTH |
				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
	}

	ret = devm_regmap_add_irq_chip(&i2c->dev, bd70528->chip.regmap,
				       i2c->irq, IRQF_ONESHOT, 0,
				       &bd70528_irq_chip, &irq_data);
	if (ret) {
		dev_err(&i2c->dev, "Failed to add IRQ chip\n");
		return ret;
	}
	dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",
		bd70528_irq_chip.num_irqs);

	/*
	 * BD70528 IRQ controller is not touching the main mask register.
	 * So enable the GPIO block interrupts at main level. We can just leave
	 * them enabled as the IRQ controller should disable IRQs from
	 * sub-registers when IRQ is disabled or freed.
	 */
	ret = regmap_update_bits(bd70528->chip.regmap,
				 BD70528_REG_INT_MAIN_MASK,
				 BD70528_INT_GPIO_MASK, 0);

	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
				   bd70528_mfd_cells,
				   ARRAY_SIZE(bd70528_mfd_cells), NULL, 0,
				   regmap_irq_get_domain(irq_data));
	if (ret)
		dev_err(&i2c->dev, "Failed to create subdevices\n");

	return ret;
}

static const struct of_device_id bd70528_of_match[] = {
	{ .compatible = "rohm,bd70528", },
	{ },
};
MODULE_DEVICE_TABLE(of, bd70528_of_match);

static struct i2c_driver bd70528_drv = {
	.driver = {
		.name = "rohm-bd70528",
		.of_match_table = bd70528_of_match,
	},
	.probe = &bd70528_i2c_probe,
};

module_i2c_driver(bd70528_drv);

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD70528 Power Management IC driver");
MODULE_LICENSE("GPL");