summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/qcom-pm8008.c
blob: 60204cc9a2dc60cc1fe1b64030f5d803100e7874 (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2021, The Linux Foundation. All rights reserved.
 */

#include <linux/bitops.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/pinctrl/consumer.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#define I2C_INTR_STATUS_BASE		0x0550
#define INT_RT_STS_OFFSET		0x10
#define INT_SET_TYPE_OFFSET		0x11
#define INT_POL_HIGH_OFFSET		0x12
#define INT_POL_LOW_OFFSET		0x13
#define INT_LATCHED_CLR_OFFSET		0x14
#define INT_EN_SET_OFFSET		0x15
#define INT_EN_CLR_OFFSET		0x16
#define INT_LATCHED_STS_OFFSET		0x18

enum {
	PM8008_MISC,
	PM8008_TEMP_ALARM,
	PM8008_GPIO1,
	PM8008_GPIO2,
	PM8008_NUM_PERIPHS,
};

#define PM8008_PERIPH_0_BASE	0x900
#define PM8008_PERIPH_1_BASE	0x2400
#define PM8008_PERIPH_2_BASE	0xc000
#define PM8008_PERIPH_3_BASE	0xc100

#define PM8008_TEMP_ALARM_ADDR	PM8008_PERIPH_1_BASE
#define PM8008_GPIO1_ADDR	PM8008_PERIPH_2_BASE
#define PM8008_GPIO2_ADDR	PM8008_PERIPH_3_BASE

/* PM8008 IRQ numbers */
#define PM8008_IRQ_MISC_UVLO	0
#define PM8008_IRQ_MISC_OVLO	1
#define PM8008_IRQ_MISC_OTST2	2
#define PM8008_IRQ_MISC_OTST3	3
#define PM8008_IRQ_MISC_LDO_OCP	4
#define PM8008_IRQ_TEMP_ALARM	5
#define PM8008_IRQ_GPIO1	6
#define PM8008_IRQ_GPIO2	7

enum {
	SET_TYPE_INDEX,
	POLARITY_HI_INDEX,
	POLARITY_LO_INDEX,
};

static const unsigned int pm8008_config_regs[] = {
	INT_SET_TYPE_OFFSET,
	INT_POL_HIGH_OFFSET,
	INT_POL_LOW_OFFSET,
};

#define _IRQ(_irq, _off, _mask, _types)			\
	[_irq] = {					\
		.reg_offset = (_off),			\
		.mask = (_mask),			\
		.type = {				\
			.type_reg_offset = (_off),	\
			.types_supported = (_types),	\
		},					\
	}

static const struct regmap_irq pm8008_irqs[] = {
	_IRQ(PM8008_IRQ_MISC_UVLO,    PM8008_MISC,	BIT(0), IRQ_TYPE_EDGE_RISING),
	_IRQ(PM8008_IRQ_MISC_OVLO,    PM8008_MISC,	BIT(1), IRQ_TYPE_EDGE_RISING),
	_IRQ(PM8008_IRQ_MISC_OTST2,   PM8008_MISC,	BIT(2), IRQ_TYPE_EDGE_RISING),
	_IRQ(PM8008_IRQ_MISC_OTST3,   PM8008_MISC,	BIT(3), IRQ_TYPE_EDGE_RISING),
	_IRQ(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC,	BIT(4), IRQ_TYPE_EDGE_RISING),
	_IRQ(PM8008_IRQ_TEMP_ALARM,   PM8008_TEMP_ALARM,BIT(0), IRQ_TYPE_SENSE_MASK),
	_IRQ(PM8008_IRQ_GPIO1,	      PM8008_GPIO1,	BIT(0), IRQ_TYPE_SENSE_MASK),
	_IRQ(PM8008_IRQ_GPIO2,	      PM8008_GPIO2,	BIT(0), IRQ_TYPE_SENSE_MASK),
};

static const unsigned int pm8008_periph_base[] = {
	PM8008_PERIPH_0_BASE,
	PM8008_PERIPH_1_BASE,
	PM8008_PERIPH_2_BASE,
	PM8008_PERIPH_3_BASE,
};

static unsigned int pm8008_get_irq_reg(struct regmap_irq_chip_data *data,
				       unsigned int base, int index)
{
	/* Simple linear addressing for the main status register */
	if (base == I2C_INTR_STATUS_BASE)
		return base + index;

	return pm8008_periph_base[index] + base;
}

static int pm8008_set_type_config(unsigned int **buf, unsigned int type,
				  const struct regmap_irq *irq_data, int idx,
				  void *irq_drv_data)
{
	switch (type) {
	case IRQ_TYPE_EDGE_FALLING:
	case IRQ_TYPE_LEVEL_LOW:
		buf[POLARITY_HI_INDEX][idx] &= ~irq_data->mask;
		buf[POLARITY_LO_INDEX][idx] |= irq_data->mask;
		break;

	case IRQ_TYPE_EDGE_RISING:
	case IRQ_TYPE_LEVEL_HIGH:
		buf[POLARITY_HI_INDEX][idx] |= irq_data->mask;
		buf[POLARITY_LO_INDEX][idx] &= ~irq_data->mask;
		break;

	case IRQ_TYPE_EDGE_BOTH:
		buf[POLARITY_HI_INDEX][idx] |= irq_data->mask;
		buf[POLARITY_LO_INDEX][idx] |= irq_data->mask;
		break;

	default:
		return -EINVAL;
	}

	if (type & IRQ_TYPE_EDGE_BOTH)
		buf[SET_TYPE_INDEX][idx] |= irq_data->mask;
	else
		buf[SET_TYPE_INDEX][idx] &= ~irq_data->mask;

	return 0;
}

static const struct regmap_irq_chip pm8008_irq_chip = {
	.name			= "pm8008",
	.main_status		= I2C_INTR_STATUS_BASE,
	.num_main_regs		= 1,
	.irqs			= pm8008_irqs,
	.num_irqs		= ARRAY_SIZE(pm8008_irqs),
	.num_regs		= PM8008_NUM_PERIPHS,
	.status_base		= INT_LATCHED_STS_OFFSET,
	.mask_base		= INT_EN_CLR_OFFSET,
	.unmask_base		= INT_EN_SET_OFFSET,
	.mask_unmask_non_inverted = true,
	.ack_base		= INT_LATCHED_CLR_OFFSET,
	.config_base		= pm8008_config_regs,
	.num_config_bases	= ARRAY_SIZE(pm8008_config_regs),
	.num_config_regs	= PM8008_NUM_PERIPHS,
	.set_type_config	= pm8008_set_type_config,
	.get_irq_reg		= pm8008_get_irq_reg,
};

static const struct regmap_config qcom_mfd_regmap_cfg = {
	.name		= "primary",
	.reg_bits	= 16,
	.val_bits	= 8,
	.max_register	= 0xffff,
};

static const struct regmap_config pm8008_regmap_cfg_2 = {
	.name		= "secondary",
	.reg_bits	= 16,
	.val_bits	= 8,
	.max_register	= 0xffff,
};

static const struct resource pm8008_temp_res[] = {
	DEFINE_RES_MEM(PM8008_TEMP_ALARM_ADDR, 0x100),
	DEFINE_RES_IRQ(PM8008_IRQ_TEMP_ALARM),
};

static const struct mfd_cell pm8008_cells[] = {
	MFD_CELL_NAME("pm8008-regulator"),
	MFD_CELL_RES("qpnp-temp-alarm", pm8008_temp_res),
	MFD_CELL_NAME("pm8008-gpio"),
};

static void devm_irq_domain_fwnode_release(void *data)
{
	struct fwnode_handle *fwnode = data;

	irq_domain_free_fwnode(fwnode);
}

static int pm8008_probe(struct i2c_client *client)
{
	struct regmap_irq_chip_data *irq_data;
	struct device *dev = &client->dev;
	struct regmap *regmap, *regmap2;
	struct fwnode_handle *fwnode;
	struct i2c_client *dummy;
	struct gpio_desc *reset;
	char *name;
	int ret;

	dummy = devm_i2c_new_dummy_device(dev, client->adapter, client->addr + 1);
	if (IS_ERR(dummy)) {
		ret = PTR_ERR(dummy);
		dev_err(dev, "failed to claim second address: %d\n", ret);
		return ret;
	}

	regmap2 = devm_regmap_init_i2c(dummy, &qcom_mfd_regmap_cfg);
	if (IS_ERR(regmap2))
		return PTR_ERR(regmap2);

	ret = regmap_attach_dev(dev, regmap2, &pm8008_regmap_cfg_2);
	if (ret)
		return ret;

	/* Default regmap must be attached last. */
	regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(reset))
		return PTR_ERR(reset);

	/*
	 * The PMIC does not appear to require a post-reset delay, but wait
	 * for a millisecond for now anyway.
	 */
	usleep_range(1000, 2000);

	name = devm_kasprintf(dev, GFP_KERNEL, "%pOF-internal", dev->of_node);
	if (!name)
		return -ENOMEM;

	name = strreplace(name, '/', ':');

	fwnode = irq_domain_alloc_named_fwnode(name);
	if (!fwnode)
		return -ENOMEM;

	ret = devm_add_action_or_reset(dev, devm_irq_domain_fwnode_release, fwnode);
	if (ret)
		return ret;

	ret = devm_regmap_add_irq_chip_fwnode(dev, fwnode, regmap, client->irq,
				IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data);
	if (ret) {
		dev_err(dev, "failed to add IRQ chip: %d\n", ret);
		return ret;
	}

	/* Needed by GPIO driver. */
	dev_set_drvdata(dev, regmap_irq_get_domain(irq_data));

	return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, pm8008_cells,
				ARRAY_SIZE(pm8008_cells), NULL, 0,
				regmap_irq_get_domain(irq_data));
}

static const struct of_device_id pm8008_match[] = {
	{ .compatible = "qcom,pm8008", },
	{ },
};
MODULE_DEVICE_TABLE(of, pm8008_match);

static struct i2c_driver pm8008_mfd_driver = {
	.driver = {
		.name = "pm8008",
		.of_match_table = pm8008_match,
	},
	.probe = pm8008_probe,
};
module_i2c_driver(pm8008_mfd_driver);

MODULE_DESCRIPTION("QCOM PM8008 Power Management IC driver");
MODULE_LICENSE("GPL v2");