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
|
// SPDX-License-Identifier: GPL-2.0
/*
* MFD core driver for Intel Cherrytrail Whiskey Cove PMIC
*
* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
*
* Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
* Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/regmap.h>
/* PMIC device registers */
#define REG_OFFSET_MASK GENMASK(7, 0)
#define REG_ADDR_MASK GENMASK(15, 8)
#define REG_ADDR_SHIFT 8
#define CHT_WC_IRQLVL1 0x6e02
#define CHT_WC_IRQLVL1_MASK 0x6e0e
/* Whiskey Cove PMIC share same ACPI ID between different platforms */
#define CHT_WC_HRV 3
/* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */
enum {
CHT_WC_PWRSRC_IRQ = 0,
CHT_WC_THRM_IRQ,
CHT_WC_BCU_IRQ,
CHT_WC_ADC_IRQ,
CHT_WC_EXT_CHGR_IRQ,
CHT_WC_GPIO_IRQ,
/* There is no irq 6 */
CHT_WC_CRIT_IRQ = 7,
};
static struct resource cht_wc_pwrsrc_resources[] = {
DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),
};
static struct resource cht_wc_ext_charger_resources[] = {
DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),
};
static struct mfd_cell cht_wc_dev[] = {
{
.name = "cht_wcove_pwrsrc",
.num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),
.resources = cht_wc_pwrsrc_resources,
}, {
.name = "cht_wcove_ext_chgr",
.num_resources = ARRAY_SIZE(cht_wc_ext_charger_resources),
.resources = cht_wc_ext_charger_resources,
},
{ .name = "cht_wcove_region", },
};
/*
* The CHT Whiskey Cove covers multiple I2C addresses, with a 1 Byte
* register address space per I2C address, so we use 16 bit register
* addresses where the high 8 bits contain the I2C client address.
*/
static int cht_wc_byte_reg_read(void *context, unsigned int reg,
unsigned int *val)
{
struct i2c_client *client = context;
int ret, orig_addr = client->addr;
if (!(reg & REG_ADDR_MASK)) {
dev_err(&client->dev, "Error I2C address not specified\n");
return -EINVAL;
}
client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
ret = i2c_smbus_read_byte_data(client, reg & REG_OFFSET_MASK);
client->addr = orig_addr;
if (ret < 0)
return ret;
*val = ret;
return 0;
}
static int cht_wc_byte_reg_write(void *context, unsigned int reg,
unsigned int val)
{
struct i2c_client *client = context;
int ret, orig_addr = client->addr;
if (!(reg & REG_ADDR_MASK)) {
dev_err(&client->dev, "Error I2C address not specified\n");
return -EINVAL;
}
client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
ret = i2c_smbus_write_byte_data(client, reg & REG_OFFSET_MASK, val);
client->addr = orig_addr;
return ret;
}
static const struct regmap_config cht_wc_regmap_cfg = {
.reg_bits = 16,
.val_bits = 8,
.reg_write = cht_wc_byte_reg_write,
.reg_read = cht_wc_byte_reg_read,
};
static const struct regmap_irq cht_wc_regmap_irqs[] = {
REGMAP_IRQ_REG(CHT_WC_PWRSRC_IRQ, 0, BIT(CHT_WC_PWRSRC_IRQ)),
REGMAP_IRQ_REG(CHT_WC_THRM_IRQ, 0, BIT(CHT_WC_THRM_IRQ)),
REGMAP_IRQ_REG(CHT_WC_BCU_IRQ, 0, BIT(CHT_WC_BCU_IRQ)),
REGMAP_IRQ_REG(CHT_WC_ADC_IRQ, 0, BIT(CHT_WC_ADC_IRQ)),
REGMAP_IRQ_REG(CHT_WC_EXT_CHGR_IRQ, 0, BIT(CHT_WC_EXT_CHGR_IRQ)),
REGMAP_IRQ_REG(CHT_WC_GPIO_IRQ, 0, BIT(CHT_WC_GPIO_IRQ)),
REGMAP_IRQ_REG(CHT_WC_CRIT_IRQ, 0, BIT(CHT_WC_CRIT_IRQ)),
};
static const struct regmap_irq_chip cht_wc_regmap_irq_chip = {
.name = "cht_wc_irq_chip",
.status_base = CHT_WC_IRQLVL1,
.mask_base = CHT_WC_IRQLVL1_MASK,
.irqs = cht_wc_regmap_irqs,
.num_irqs = ARRAY_SIZE(cht_wc_regmap_irqs),
.num_regs = 1,
};
static int cht_wc_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct intel_soc_pmic *pmic;
acpi_status status;
unsigned long long hrv;
int ret;
status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
if (ACPI_FAILURE(status)) {
dev_err(dev, "Failed to get PMIC hardware revision\n");
return -ENODEV;
}
if (hrv != CHT_WC_HRV) {
dev_err(dev, "Invalid PMIC hardware revision: %llu\n", hrv);
return -ENODEV;
}
if (client->irq < 0) {
dev_err(dev, "Invalid IRQ\n");
return -EINVAL;
}
pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
pmic->irq = client->irq;
pmic->dev = dev;
i2c_set_clientdata(client, pmic);
pmic->regmap = devm_regmap_init(dev, NULL, client, &cht_wc_regmap_cfg);
if (IS_ERR(pmic->regmap))
return PTR_ERR(pmic->regmap);
ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
IRQF_ONESHOT | IRQF_SHARED, 0,
&cht_wc_regmap_irq_chip,
&pmic->irq_chip_data);
if (ret)
return ret;
return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
cht_wc_dev, ARRAY_SIZE(cht_wc_dev), NULL, 0,
regmap_irq_get_domain(pmic->irq_chip_data));
}
static void cht_wc_shutdown(struct i2c_client *client)
{
struct intel_soc_pmic *pmic = i2c_get_clientdata(client);
disable_irq(pmic->irq);
}
static int __maybe_unused cht_wc_suspend(struct device *dev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
disable_irq(pmic->irq);
return 0;
}
static int __maybe_unused cht_wc_resume(struct device *dev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
enable_irq(pmic->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(cht_wc_pm_ops, cht_wc_suspend, cht_wc_resume);
static const struct i2c_device_id cht_wc_i2c_id[] = {
{ }
};
static const struct acpi_device_id cht_wc_acpi_ids[] = {
{ "INT34D3", },
{ }
};
static struct i2c_driver cht_wc_driver = {
.driver = {
.name = "CHT Whiskey Cove PMIC",
.pm = &cht_wc_pm_ops,
.acpi_match_table = cht_wc_acpi_ids,
},
.probe_new = cht_wc_probe,
.shutdown = cht_wc_shutdown,
.id_table = cht_wc_i2c_id,
};
builtin_i2c_driver(cht_wc_driver);
|
