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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*/
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/spmi.h>
#include <linux/types.h>
#include <linux/regmap.h>
#include <soc/qcom/qcom-spmi-pmic.h>
#define PMIC_REV2 0x101
#define PMIC_REV3 0x102
#define PMIC_REV4 0x103
#define PMIC_TYPE 0x104
#define PMIC_SUBTYPE 0x105
#define PMIC_FAB_ID 0x1f2
#define PMIC_TYPE_VALUE 0x51
#define PMIC_REV4_V2 0x02
struct qcom_spmi_dev {
int num_usids;
struct qcom_spmi_pmic pmic;
};
static DEFINE_MUTEX(pmic_spmi_revid_lock);
#define N_USIDS(n) ((void *)n)
static const struct of_device_id pmic_spmi_id_table[] = {
{ .compatible = "qcom,pm660", .data = N_USIDS(2) },
{ .compatible = "qcom,pm660l", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8004", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8005", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8019", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8028", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8110", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8150", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8150b", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8150c", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8150l", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8226", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8841", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8901", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8909", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8916", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8937", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8941", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8950", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8994", .data = N_USIDS(2) },
{ .compatible = "qcom,pm8998", .data = N_USIDS(2) },
{ .compatible = "qcom,pma8084", .data = N_USIDS(2) },
{ .compatible = "qcom,pmd9635", .data = N_USIDS(2) },
{ .compatible = "qcom,pmi8950", .data = N_USIDS(2) },
{ .compatible = "qcom,pmi8962", .data = N_USIDS(2) },
{ .compatible = "qcom,pmi8994", .data = N_USIDS(2) },
{ .compatible = "qcom,pmi8998", .data = N_USIDS(2) },
{ .compatible = "qcom,pmk8002", .data = N_USIDS(2) },
{ .compatible = "qcom,pmp8074", .data = N_USIDS(2) },
{ .compatible = "qcom,smb2351", .data = N_USIDS(2) },
{ .compatible = "qcom,spmi-pmic", .data = N_USIDS(1) },
{ }
};
/*
* A PMIC can be represented by multiple SPMI devices, but
* only the base PMIC device will contain a reference to
* the revision information.
*
* This function takes a pointer to a pmic device and
* returns a pointer to the base PMIC device.
*
* This only supports PMICs with 1 or 2 USIDs.
*/
static struct spmi_device *qcom_pmic_get_base_usid(struct spmi_device *sdev, struct qcom_spmi_dev *ctx)
{
struct device_node *spmi_bus;
int function_parent_usid, ret;
u32 pmic_addr;
/*
* Quick return if the function device is already in the base
* USID. This will always be hit for PMICs with only 1 USID.
*/
if (sdev->usid % ctx->num_usids == 0) {
get_device(&sdev->dev);
return sdev;
}
function_parent_usid = sdev->usid;
/*
* Walk through the list of PMICs until we find the sibling USID.
* The goal is to find the first USID which is less than the
* number of USIDs in the PMIC array, e.g. for a PMIC with 2 USIDs
* where the function device is under USID 3, we want to find the
* device for USID 2.
*/
spmi_bus = of_get_parent(sdev->dev.of_node);
sdev = ERR_PTR(-ENODATA);
for_each_child_of_node_scoped(spmi_bus, child) {
ret = of_property_read_u32_index(child, "reg", 0, &pmic_addr);
if (ret) {
sdev = ERR_PTR(ret);
break;
}
if (pmic_addr == function_parent_usid - (ctx->num_usids - 1)) {
sdev = spmi_find_device_by_of_node(child);
if (!sdev) {
/*
* If the base USID for this PMIC hasn't been
* registered yet then we need to defer.
*/
sdev = ERR_PTR(-EPROBE_DEFER);
}
break;
}
}
of_node_put(spmi_bus);
return sdev;
}
static int pmic_spmi_get_base_revid(struct spmi_device *sdev, struct qcom_spmi_dev *ctx)
{
struct qcom_spmi_dev *base_ctx;
struct spmi_device *base;
int ret = 0;
base = qcom_pmic_get_base_usid(sdev, ctx);
if (IS_ERR(base))
return PTR_ERR(base);
/*
* Copy revid info from base device if it has probed and is still
* bound to its driver.
*/
mutex_lock(&pmic_spmi_revid_lock);
base_ctx = spmi_device_get_drvdata(base);
if (!base_ctx) {
ret = -EPROBE_DEFER;
goto out_unlock;
}
memcpy(&ctx->pmic, &base_ctx->pmic, sizeof(ctx->pmic));
out_unlock:
mutex_unlock(&pmic_spmi_revid_lock);
put_device(&base->dev);
return ret;
}
static int pmic_spmi_load_revid(struct regmap *map, struct device *dev,
struct qcom_spmi_pmic *pmic)
{
int ret;
ret = regmap_read(map, PMIC_TYPE, &pmic->type);
if (ret < 0)
return ret;
if (pmic->type != PMIC_TYPE_VALUE)
return ret;
ret = regmap_read(map, PMIC_SUBTYPE, &pmic->subtype);
if (ret < 0)
return ret;
pmic->name = of_match_device(pmic_spmi_id_table, dev)->compatible;
ret = regmap_read(map, PMIC_REV2, &pmic->rev2);
if (ret < 0)
return ret;
ret = regmap_read(map, PMIC_REV3, &pmic->minor);
if (ret < 0)
return ret;
ret = regmap_read(map, PMIC_REV4, &pmic->major);
if (ret < 0)
return ret;
if (pmic->subtype == PMI8998_SUBTYPE || pmic->subtype == PM660_SUBTYPE) {
ret = regmap_read(map, PMIC_FAB_ID, &pmic->fab_id);
if (ret < 0)
return ret;
}
/*
* In early versions of PM8941 and PM8226, the major revision number
* started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
* Increment the major revision number here if the chip is an early
* version of PM8941 or PM8226.
*/
if ((pmic->subtype == PM8941_SUBTYPE || pmic->subtype == PM8226_SUBTYPE) &&
pmic->major < PMIC_REV4_V2)
pmic->major++;
if (pmic->subtype == PM8110_SUBTYPE)
pmic->minor = pmic->rev2;
dev_dbg(dev, "%x: %s v%d.%d\n",
pmic->subtype, pmic->name, pmic->major, pmic->minor);
return 0;
}
/**
* qcom_pmic_get() - Get a pointer to the base PMIC device
*
* This function takes a struct device for a driver which is a child of a PMIC.
* And locates the PMIC revision information for it.
*
* @dev: the pmic function device
* @return: the struct qcom_spmi_pmic* pointer associated with the function device
*/
const struct qcom_spmi_pmic *qcom_pmic_get(struct device *dev)
{
struct spmi_device *sdev;
struct qcom_spmi_dev *spmi;
/*
* Make sure the device is actually a child of a PMIC
*/
if (!of_match_device(pmic_spmi_id_table, dev->parent))
return ERR_PTR(-EINVAL);
sdev = to_spmi_device(dev->parent);
spmi = dev_get_drvdata(&sdev->dev);
return &spmi->pmic;
}
EXPORT_SYMBOL_GPL(qcom_pmic_get);
static const struct regmap_config spmi_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.max_register = 0xffff,
.fast_io = true,
};
static int pmic_spmi_probe(struct spmi_device *sdev)
{
struct regmap *regmap;
struct qcom_spmi_dev *ctx;
int ret;
regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
ctx = devm_kzalloc(&sdev->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->num_usids = (uintptr_t)device_get_match_data(&sdev->dev);
/* Only the first slave id for a PMIC contains this information */
if (sdev->usid % ctx->num_usids == 0) {
ret = pmic_spmi_load_revid(regmap, &sdev->dev, &ctx->pmic);
if (ret < 0)
return ret;
} else {
ret = pmic_spmi_get_base_revid(sdev, ctx);
if (ret)
return ret;
}
mutex_lock(&pmic_spmi_revid_lock);
spmi_device_set_drvdata(sdev, ctx);
mutex_unlock(&pmic_spmi_revid_lock);
return devm_of_platform_populate(&sdev->dev);
}
static void pmic_spmi_remove(struct spmi_device *sdev)
{
mutex_lock(&pmic_spmi_revid_lock);
spmi_device_set_drvdata(sdev, NULL);
mutex_unlock(&pmic_spmi_revid_lock);
}
MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
static struct spmi_driver pmic_spmi_driver = {
.probe = pmic_spmi_probe,
.remove = pmic_spmi_remove,
.driver = {
.name = "pmic-spmi",
.of_match_table = pmic_spmi_id_table,
},
};
module_spmi_driver(pmic_spmi_driver);
MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
MODULE_ALIAS("spmi:spmi-pmic");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
|
