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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021, The Linux Foundation. All rights reserved.
*/
#include <linux/bitops.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/pinctrl/consumer.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <dt-bindings/mfd/qcom-pm8008.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
#define PM8008_STATUS_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_STS_OFFSET)
#define PM8008_MASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_SET_OFFSET)
#define PM8008_UNMASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_CLR_OFFSET)
#define PM8008_TYPE_BASE (PM8008_PERIPH_0_BASE | INT_SET_TYPE_OFFSET)
#define PM8008_ACK_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_CLR_OFFSET)
#define PM8008_POLARITY_HI_BASE (PM8008_PERIPH_0_BASE | INT_POL_HIGH_OFFSET)
#define PM8008_POLARITY_LO_BASE (PM8008_PERIPH_0_BASE | INT_POL_LOW_OFFSET)
#define PM8008_PERIPH_OFFSET(paddr) (paddr - PM8008_PERIPH_0_BASE)
struct pm8008_data {
struct device *dev;
struct regmap *regmap;
int irq;
struct regmap_irq_chip_data *irq_data;
};
static unsigned int p0_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_0_BASE)};
static unsigned int p1_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_1_BASE)};
static unsigned int p2_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_2_BASE)};
static unsigned int p3_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_3_BASE)};
static struct regmap_irq_sub_irq_map pm8008_sub_reg_offsets[] = {
REGMAP_IRQ_MAIN_REG_OFFSET(p0_offs),
REGMAP_IRQ_MAIN_REG_OFFSET(p1_offs),
REGMAP_IRQ_MAIN_REG_OFFSET(p2_offs),
REGMAP_IRQ_MAIN_REG_OFFSET(p3_offs),
};
static unsigned int pm8008_virt_regs[] = {
PM8008_POLARITY_HI_BASE,
PM8008_POLARITY_LO_BASE,
};
enum {
POLARITY_HI_INDEX,
POLARITY_LO_INDEX,
PM8008_NUM_VIRT_REGS,
};
static struct regmap_irq pm8008_irqs[] = {
REGMAP_IRQ_REG(PM8008_IRQ_MISC_UVLO, PM8008_MISC, BIT(0)),
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OVLO, PM8008_MISC, BIT(1)),
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST2, PM8008_MISC, BIT(2)),
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST3, PM8008_MISC, BIT(3)),
REGMAP_IRQ_REG(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC, BIT(4)),
REGMAP_IRQ_REG(PM8008_IRQ_TEMP_ALARM, PM8008_TEMP_ALARM, BIT(0)),
REGMAP_IRQ_REG(PM8008_IRQ_GPIO1, PM8008_GPIO1, BIT(0)),
REGMAP_IRQ_REG(PM8008_IRQ_GPIO2, PM8008_GPIO2, BIT(0)),
};
static int pm8008_set_type_virt(unsigned int **virt_buf,
unsigned int type, unsigned long hwirq,
int reg)
{
switch (type) {
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_LEVEL_LOW:
virt_buf[POLARITY_HI_INDEX][reg] &= ~pm8008_irqs[hwirq].mask;
virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask;
break;
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_LEVEL_HIGH:
virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask;
virt_buf[POLARITY_LO_INDEX][reg] &= ~pm8008_irqs[hwirq].mask;
break;
case IRQ_TYPE_EDGE_BOTH:
virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask;
virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask;
break;
default:
return -EINVAL;
}
return 0;
}
static struct regmap_irq_chip pm8008_irq_chip = {
.name = "pm8008_irq",
.main_status = I2C_INTR_STATUS_BASE,
.num_main_regs = 1,
.num_virt_regs = PM8008_NUM_VIRT_REGS,
.irqs = pm8008_irqs,
.num_irqs = ARRAY_SIZE(pm8008_irqs),
.num_regs = PM8008_NUM_PERIPHS,
.not_fixed_stride = true,
.sub_reg_offsets = pm8008_sub_reg_offsets,
.set_type_virt = pm8008_set_type_virt,
.status_base = PM8008_STATUS_BASE,
.mask_base = PM8008_MASK_BASE,
.unmask_base = PM8008_UNMASK_BASE,
.type_base = PM8008_TYPE_BASE,
.ack_base = PM8008_ACK_BASE,
.virt_reg_base = pm8008_virt_regs,
.num_type_reg = PM8008_NUM_PERIPHS,
};
static struct regmap_config qcom_mfd_regmap_cfg = {
.reg_bits = 16,
.val_bits = 8,
.max_register = 0xFFFF,
};
static int pm8008_init(struct pm8008_data *chip)
{
int rc;
/*
* Set TEMP_ALARM peripheral's TYPE so that the regmap-irq framework
* reads this as the default value instead of zero, the HW default.
* This is required to enable the writing of TYPE registers in
* regmap_irq_sync_unlock().
*/
rc = regmap_write(chip->regmap,
(PM8008_TEMP_ALARM_ADDR | INT_SET_TYPE_OFFSET),
BIT(0));
if (rc)
return rc;
/* Do the same for GPIO1 and GPIO2 peripherals */
rc = regmap_write(chip->regmap,
(PM8008_GPIO1_ADDR | INT_SET_TYPE_OFFSET), BIT(0));
if (rc)
return rc;
rc = regmap_write(chip->regmap,
(PM8008_GPIO2_ADDR | INT_SET_TYPE_OFFSET), BIT(0));
return rc;
}
static int pm8008_probe_irq_peripherals(struct pm8008_data *chip,
int client_irq)
{
int rc, i;
struct regmap_irq_type *type;
struct regmap_irq_chip_data *irq_data;
rc = pm8008_init(chip);
if (rc) {
dev_err(chip->dev, "Init failed: %d\n", rc);
return rc;
}
for (i = 0; i < ARRAY_SIZE(pm8008_irqs); i++) {
type = &pm8008_irqs[i].type;
type->type_reg_offset = pm8008_irqs[i].reg_offset;
type->type_rising_val = pm8008_irqs[i].mask;
type->type_falling_val = pm8008_irqs[i].mask;
type->type_level_high_val = 0;
type->type_level_low_val = 0;
if (type->type_reg_offset == PM8008_MISC)
type->types_supported = IRQ_TYPE_EDGE_RISING;
else
type->types_supported = (IRQ_TYPE_EDGE_BOTH |
IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
}
rc = devm_regmap_add_irq_chip(chip->dev, chip->regmap, client_irq,
IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data);
if (rc) {
dev_err(chip->dev, "Failed to add IRQ chip: %d\n", rc);
return rc;
}
return 0;
}
static int pm8008_probe(struct i2c_client *client)
{
int rc;
struct pm8008_data *chip;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = &client->dev;
chip->regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
if (!chip->regmap)
return -ENODEV;
i2c_set_clientdata(client, chip);
if (of_property_read_bool(chip->dev->of_node, "interrupt-controller")) {
rc = pm8008_probe_irq_peripherals(chip, client->irq);
if (rc)
dev_err(chip->dev, "Failed to probe irq periphs: %d\n", rc);
}
return devm_of_platform_populate(chip->dev);
}
static const struct of_device_id pm8008_match[] = {
{ .compatible = "qcom,pm8008", },
{ },
};
static struct i2c_driver pm8008_mfd_driver = {
.driver = {
.name = "pm8008",
.of_match_table = pm8008_match,
},
.probe_new = pm8008_probe,
};
module_i2c_driver(pm8008_mfd_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("i2c:qcom-pm8008");
|
