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15#include <linux/kernel.h>
16#include <linux/device.h>
17#include <linux/sysfs.h>
18#include <linux/module.h>
19#include <linux/types.h>
20#include <linux/interrupt.h>
21#include <linux/workqueue.h>
22#include <linux/platform_device.h>
23#include <linux/i2c.h>
24#include <linux/pm.h>
25#include <linux/slab.h>
26#include <linux/regmap.h>
27#include <linux/err.h>
28
29#include <linux/mfd/pcf50633/core.h>
30
31
32int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
33 int nr_regs, u8 *data)
34{
35 int ret;
36
37 ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
38 if (ret != 0)
39 return ret;
40
41 return nr_regs;
42}
43EXPORT_SYMBOL_GPL(pcf50633_read_block);
44
45
46int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
47 int nr_regs, u8 *data)
48{
49 return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
50}
51EXPORT_SYMBOL_GPL(pcf50633_write_block);
52
53u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
54{
55 unsigned int val;
56 int ret;
57
58 ret = regmap_read(pcf->regmap, reg, &val);
59 if (ret < 0)
60 return -1;
61
62 return val;
63}
64EXPORT_SYMBOL_GPL(pcf50633_reg_read);
65
66int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
67{
68 return regmap_write(pcf->regmap, reg, val);
69}
70EXPORT_SYMBOL_GPL(pcf50633_reg_write);
71
72int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
73{
74 return regmap_update_bits(pcf->regmap, reg, mask, val);
75}
76EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
77
78int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
79{
80 return regmap_update_bits(pcf->regmap, reg, val, 0);
81}
82EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
83
84
85static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
86 char *buf)
87{
88 struct pcf50633 *pcf = dev_get_drvdata(dev);
89 u8 dump[16];
90 int n, n1, idx = 0;
91 char *buf1 = buf;
92 static u8 address_no_read[] = {
93 PCF50633_REG_INT1,
94 PCF50633_REG_INT2,
95 PCF50633_REG_INT3,
96 PCF50633_REG_INT4,
97 PCF50633_REG_INT5,
98 0
99 };
100
101 for (n = 0; n < 256; n += sizeof(dump)) {
102 for (n1 = 0; n1 < sizeof(dump); n1++)
103 if (n == address_no_read[idx]) {
104 idx++;
105 dump[n1] = 0x00;
106 } else
107 dump[n1] = pcf50633_reg_read(pcf, n + n1);
108
109 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
110 buf1 += strlen(buf1);
111 *buf1++ = '\n';
112 *buf1 = '\0';
113 }
114
115 return buf1 - buf;
116}
117static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
118
119static ssize_t show_resume_reason(struct device *dev,
120 struct device_attribute *attr, char *buf)
121{
122 struct pcf50633 *pcf = dev_get_drvdata(dev);
123 int n;
124
125 n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
126 pcf->resume_reason[0],
127 pcf->resume_reason[1],
128 pcf->resume_reason[2],
129 pcf->resume_reason[3],
130 pcf->resume_reason[4]);
131
132 return n;
133}
134static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
135
136static struct attribute *pcf_sysfs_entries[] = {
137 &dev_attr_dump_regs.attr,
138 &dev_attr_resume_reason.attr,
139 NULL,
140};
141
142static struct attribute_group pcf_attr_group = {
143 .name = NULL,
144 .attrs = pcf_sysfs_entries,
145};
146
147static void
148pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
149 struct platform_device **pdev)
150{
151 int ret;
152
153 *pdev = platform_device_alloc(name, -1);
154 if (!*pdev) {
155 dev_err(pcf->dev, "Falied to allocate %s\n", name);
156 return;
157 }
158
159 (*pdev)->dev.parent = pcf->dev;
160
161 ret = platform_device_add(*pdev);
162 if (ret) {
163 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
164 platform_device_put(*pdev);
165 *pdev = NULL;
166 }
167}
168
169#ifdef CONFIG_PM_SLEEP
170static int pcf50633_suspend(struct device *dev)
171{
172 struct i2c_client *client = to_i2c_client(dev);
173 struct pcf50633 *pcf = i2c_get_clientdata(client);
174
175 return pcf50633_irq_suspend(pcf);
176}
177
178static int pcf50633_resume(struct device *dev)
179{
180 struct i2c_client *client = to_i2c_client(dev);
181 struct pcf50633 *pcf = i2c_get_clientdata(client);
182
183 return pcf50633_irq_resume(pcf);
184}
185#endif
186
187static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
188
189static struct regmap_config pcf50633_regmap_config = {
190 .reg_bits = 8,
191 .val_bits = 8,
192};
193
194static int pcf50633_probe(struct i2c_client *client,
195 const struct i2c_device_id *ids)
196{
197 struct pcf50633 *pcf;
198 struct pcf50633_platform_data *pdata = client->dev.platform_data;
199 int i, ret;
200 int version, variant;
201
202 if (!client->irq) {
203 dev_err(&client->dev, "Missing IRQ\n");
204 return -ENOENT;
205 }
206
207 pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
208 if (!pcf)
209 return -ENOMEM;
210
211 i2c_set_clientdata(client, pcf);
212 pcf->dev = &client->dev;
213 pcf->pdata = pdata;
214
215 mutex_init(&pcf->lock);
216
217 pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
218 if (IS_ERR(pcf->regmap)) {
219 ret = PTR_ERR(pcf->regmap);
220 dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
221 return ret;
222 }
223
224 version = pcf50633_reg_read(pcf, 0);
225 variant = pcf50633_reg_read(pcf, 1);
226 if (version < 0 || variant < 0) {
227 dev_err(pcf->dev, "Unable to probe pcf50633\n");
228 ret = -ENODEV;
229 return ret;
230 }
231
232 dev_info(pcf->dev, "Probed device version %d variant %d\n",
233 version, variant);
234
235 pcf50633_irq_init(pcf, client->irq);
236
237
238 pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
239 pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
240 pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
241 pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
242 pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);
243
244
245 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
246 struct platform_device *pdev;
247
248 pdev = platform_device_alloc("pcf50633-regltr", i);
249 if (!pdev) {
250 dev_err(pcf->dev, "Cannot create regulator %d\n", i);
251 continue;
252 }
253
254 pdev->dev.parent = pcf->dev;
255 if (platform_device_add_data(pdev, &pdata->reg_init_data[i],
256 sizeof(pdata->reg_init_data[i])) < 0) {
257 platform_device_put(pdev);
258 dev_err(pcf->dev, "Out of memory for regulator parameters %d\n",
259 i);
260 continue;
261 }
262 pcf->regulator_pdev[i] = pdev;
263
264 platform_device_add(pdev);
265 }
266
267 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
268 if (ret)
269 dev_err(pcf->dev, "error creating sysfs entries\n");
270
271 if (pdata->probe_done)
272 pdata->probe_done(pcf);
273
274 return 0;
275}
276
277static int pcf50633_remove(struct i2c_client *client)
278{
279 struct pcf50633 *pcf = i2c_get_clientdata(client);
280 int i;
281
282 sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
283 pcf50633_irq_free(pcf);
284
285 platform_device_unregister(pcf->input_pdev);
286 platform_device_unregister(pcf->rtc_pdev);
287 platform_device_unregister(pcf->mbc_pdev);
288 platform_device_unregister(pcf->adc_pdev);
289 platform_device_unregister(pcf->bl_pdev);
290
291 for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
292 platform_device_unregister(pcf->regulator_pdev[i]);
293
294 return 0;
295}
296
297static const struct i2c_device_id pcf50633_id_table[] = {
298 {"pcf50633", 0x73},
299 {}
300};
301MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
302
303static struct i2c_driver pcf50633_driver = {
304 .driver = {
305 .name = "pcf50633",
306 .pm = &pcf50633_pm,
307 },
308 .id_table = pcf50633_id_table,
309 .probe = pcf50633_probe,
310 .remove = pcf50633_remove,
311};
312
313static int __init pcf50633_init(void)
314{
315 return i2c_add_driver(&pcf50633_driver);
316}
317
318static void __exit pcf50633_exit(void)
319{
320 i2c_del_driver(&pcf50633_driver);
321}
322
323MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
324MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
325MODULE_LICENSE("GPL");
326
327subsys_initcall(pcf50633_init);
328module_exit(pcf50633_exit);
329
