Commit | Line | Data |
---|---|---|
2165c8a4 | 1 | /* |
f7bae49a | 2 | * Driver for LP8727 Micro/Mini USB IC with integrated charger |
2165c8a4 | 3 | * |
e39b828f | 4 | * Copyright (C) 2011 Texas Instruments |
2165c8a4 WK |
5 | * Copyright (C) 2011 National Semiconductor |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/power_supply.h> | |
1aebb097 | 18 | #include <linux/platform_data/lp8727.h> |
17b4565b | 19 | #include <linux/of.h> |
2165c8a4 | 20 | |
638555d2 | 21 | #define LP8788_NUM_INTREGS 2 |
60fd57e0 | 22 | #define DEFAULT_DEBOUNCE_MSEC 270 |
2165c8a4 WK |
23 | |
24 | /* Registers */ | |
6029719f KM |
25 | #define LP8727_CTRL1 0x1 |
26 | #define LP8727_CTRL2 0x2 | |
27 | #define LP8727_SWCTRL 0x3 | |
28 | #define LP8727_INT1 0x4 | |
29 | #define LP8727_INT2 0x5 | |
30 | #define LP8727_STATUS1 0x6 | |
31 | #define LP8727_STATUS2 0x7 | |
32 | #define LP8727_CHGCTRL2 0x9 | |
2165c8a4 WK |
33 | |
34 | /* CTRL1 register */ | |
6029719f KM |
35 | #define LP8727_CP_EN BIT(0) |
36 | #define LP8727_ADC_EN BIT(1) | |
37 | #define LP8727_ID200_EN BIT(4) | |
2165c8a4 WK |
38 | |
39 | /* CTRL2 register */ | |
6029719f KM |
40 | #define LP8727_CHGDET_EN BIT(1) |
41 | #define LP8727_INT_EN BIT(6) | |
2165c8a4 WK |
42 | |
43 | /* SWCTRL register */ | |
6029719f KM |
44 | #define LP8727_SW_DM1_DM (0x0 << 0) |
45 | #define LP8727_SW_DM1_HiZ (0x7 << 0) | |
46 | #define LP8727_SW_DP2_DP (0x0 << 3) | |
47 | #define LP8727_SW_DP2_HiZ (0x7 << 3) | |
2165c8a4 WK |
48 | |
49 | /* INT1 register */ | |
6029719f KM |
50 | #define LP8727_IDNO (0xF << 0) |
51 | #define LP8727_VBUS BIT(4) | |
2165c8a4 WK |
52 | |
53 | /* STATUS1 register */ | |
6029719f KM |
54 | #define LP8727_CHGSTAT (3 << 4) |
55 | #define LP8727_CHPORT BIT(6) | |
56 | #define LP8727_DCPORT BIT(7) | |
57 | #define LP8727_STAT_EOC 0x30 | |
2165c8a4 WK |
58 | |
59 | /* STATUS2 register */ | |
6029719f KM |
60 | #define LP8727_TEMP_STAT (3 << 5) |
61 | #define LP8727_TEMP_SHIFT 5 | |
2165c8a4 | 62 | |
18763a36 KM |
63 | /* CHGCTRL2 register */ |
64 | #define LP8727_ICHG_SHIFT 4 | |
65 | ||
2165c8a4 | 66 | enum lp8727_dev_id { |
6029719f KM |
67 | LP8727_ID_NONE, |
68 | LP8727_ID_TA, | |
69 | LP8727_ID_DEDICATED_CHG, | |
70 | LP8727_ID_USB_CHG, | |
71 | LP8727_ID_USB_DS, | |
72 | LP8727_ID_MAX, | |
2165c8a4 WK |
73 | }; |
74 | ||
b1ad0796 KM |
75 | enum lp8727_die_temp { |
76 | LP8788_TEMP_75C, | |
77 | LP8788_TEMP_95C, | |
78 | LP8788_TEMP_115C, | |
79 | LP8788_TEMP_135C, | |
80 | }; | |
81 | ||
2165c8a4 WK |
82 | struct lp8727_psy { |
83 | struct power_supply ac; | |
84 | struct power_supply usb; | |
85 | struct power_supply batt; | |
86 | }; | |
87 | ||
88 | struct lp8727_chg { | |
89 | struct device *dev; | |
90 | struct i2c_client *client; | |
91 | struct mutex xfer_lock; | |
2165c8a4 | 92 | struct lp8727_psy *psy; |
1ae9df7d KM |
93 | struct lp8727_platform_data *pdata; |
94 | ||
95 | /* Charger Data */ | |
2165c8a4 | 96 | enum lp8727_dev_id devid; |
1ae9df7d KM |
97 | struct lp8727_chg_param *chg_param; |
98 | ||
99 | /* Interrupt Handling */ | |
d71fda01 | 100 | int irq; |
1ae9df7d KM |
101 | struct delayed_work work; |
102 | unsigned long debounce_jiffies; | |
2165c8a4 WK |
103 | }; |
104 | ||
27aefa3b | 105 | static int lp8727_read_bytes(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len) |
2165c8a4 WK |
106 | { |
107 | s32 ret; | |
108 | ||
109 | mutex_lock(&pchg->xfer_lock); | |
110 | ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data); | |
111 | mutex_unlock(&pchg->xfer_lock); | |
112 | ||
113 | return (ret != len) ? -EIO : 0; | |
114 | } | |
115 | ||
27aefa3b | 116 | static inline int lp8727_read_byte(struct lp8727_chg *pchg, u8 reg, u8 *data) |
2165c8a4 | 117 | { |
27aefa3b KM |
118 | return lp8727_read_bytes(pchg, reg, data, 1); |
119 | } | |
120 | ||
121 | static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data) | |
122 | { | |
123 | int ret; | |
2165c8a4 WK |
124 | |
125 | mutex_lock(&pchg->xfer_lock); | |
27aefa3b | 126 | ret = i2c_smbus_write_byte_data(pchg->client, reg, data); |
2165c8a4 WK |
127 | mutex_unlock(&pchg->xfer_lock); |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
65272bac | 132 | static bool lp8727_is_charger_attached(const char *name, int id) |
2165c8a4 | 133 | { |
65272bac KM |
134 | if (!strcmp(name, "ac")) |
135 | return id == LP8727_ID_TA || id == LP8727_ID_DEDICATED_CHG; | |
136 | else if (!strcmp(name, "usb")) | |
137 | return id == LP8727_ID_USB_CHG; | |
138 | ||
139 | return id >= LP8727_ID_TA && id <= LP8727_ID_USB_CHG; | |
2165c8a4 WK |
140 | } |
141 | ||
7da6334e | 142 | static int lp8727_init_device(struct lp8727_chg *pchg) |
2165c8a4 WK |
143 | { |
144 | u8 val; | |
7da6334e | 145 | int ret; |
638555d2 KM |
146 | u8 intstat[LP8788_NUM_INTREGS]; |
147 | ||
148 | /* clear interrupts */ | |
6029719f | 149 | ret = lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS); |
638555d2 KM |
150 | if (ret) |
151 | return ret; | |
152 | ||
6029719f KM |
153 | val = LP8727_ID200_EN | LP8727_ADC_EN | LP8727_CP_EN; |
154 | ret = lp8727_write_byte(pchg, LP8727_CTRL1, val); | |
7da6334e KM |
155 | if (ret) |
156 | return ret; | |
2165c8a4 | 157 | |
6029719f | 158 | val = LP8727_INT_EN | LP8727_CHGDET_EN; |
70be1305 | 159 | return lp8727_write_byte(pchg, LP8727_CTRL2, val); |
2165c8a4 WK |
160 | } |
161 | ||
162 | static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg) | |
163 | { | |
164 | u8 val; | |
b9633ef1 | 165 | |
6029719f KM |
166 | lp8727_read_byte(pchg, LP8727_STATUS1, &val); |
167 | return val & LP8727_DCPORT; | |
2165c8a4 WK |
168 | } |
169 | ||
170 | static int lp8727_is_usb_charger(struct lp8727_chg *pchg) | |
171 | { | |
172 | u8 val; | |
b9633ef1 | 173 | |
6029719f KM |
174 | lp8727_read_byte(pchg, LP8727_STATUS1, &val); |
175 | return val & LP8727_CHPORT; | |
2165c8a4 WK |
176 | } |
177 | ||
91a69633 | 178 | static inline void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw) |
2165c8a4 | 179 | { |
6029719f | 180 | lp8727_write_byte(pchg, LP8727_SWCTRL, sw); |
2165c8a4 WK |
181 | } |
182 | ||
183 | static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin) | |
184 | { | |
318cb389 | 185 | struct lp8727_platform_data *pdata = pchg->pdata; |
6029719f KM |
186 | u8 devid = LP8727_ID_NONE; |
187 | u8 swctrl = LP8727_SW_DM1_HiZ | LP8727_SW_DP2_HiZ; | |
2165c8a4 WK |
188 | |
189 | switch (id) { | |
190 | case 0x5: | |
6029719f | 191 | devid = LP8727_ID_TA; |
56d99ed9 | 192 | pchg->chg_param = pdata ? pdata->ac : NULL; |
2165c8a4 WK |
193 | break; |
194 | case 0xB: | |
195 | if (lp8727_is_dedicated_charger(pchg)) { | |
56d99ed9 | 196 | pchg->chg_param = pdata ? pdata->ac : NULL; |
6029719f | 197 | devid = LP8727_ID_DEDICATED_CHG; |
2165c8a4 | 198 | } else if (lp8727_is_usb_charger(pchg)) { |
56d99ed9 | 199 | pchg->chg_param = pdata ? pdata->usb : NULL; |
6029719f KM |
200 | devid = LP8727_ID_USB_CHG; |
201 | swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP; | |
2165c8a4 | 202 | } else if (vbusin) { |
6029719f KM |
203 | devid = LP8727_ID_USB_DS; |
204 | swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP; | |
2165c8a4 WK |
205 | } |
206 | break; | |
207 | default: | |
6029719f | 208 | devid = LP8727_ID_NONE; |
56d99ed9 | 209 | pchg->chg_param = NULL; |
2165c8a4 WK |
210 | break; |
211 | } | |
212 | ||
213 | pchg->devid = devid; | |
214 | lp8727_ctrl_switch(pchg, swctrl); | |
215 | } | |
216 | ||
217 | static void lp8727_enable_chgdet(struct lp8727_chg *pchg) | |
218 | { | |
219 | u8 val; | |
220 | ||
6029719f KM |
221 | lp8727_read_byte(pchg, LP8727_CTRL2, &val); |
222 | val |= LP8727_CHGDET_EN; | |
223 | lp8727_write_byte(pchg, LP8727_CTRL2, val); | |
2165c8a4 WK |
224 | } |
225 | ||
226 | static void lp8727_delayed_func(struct work_struct *_work) | |
227 | { | |
5e00b976 KM |
228 | struct lp8727_chg *pchg = container_of(_work, struct lp8727_chg, |
229 | work.work); | |
230 | u8 intstat[LP8788_NUM_INTREGS]; | |
231 | u8 idno; | |
232 | u8 vbus; | |
2165c8a4 | 233 | |
18763a36 | 234 | if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) { |
2165c8a4 WK |
235 | dev_err(pchg->dev, "can not read INT registers\n"); |
236 | return; | |
237 | } | |
238 | ||
6029719f KM |
239 | idno = intstat[0] & LP8727_IDNO; |
240 | vbus = intstat[0] & LP8727_VBUS; | |
2165c8a4 WK |
241 | |
242 | lp8727_id_detection(pchg, idno, vbus); | |
243 | lp8727_enable_chgdet(pchg); | |
244 | ||
245 | power_supply_changed(&pchg->psy->ac); | |
246 | power_supply_changed(&pchg->psy->usb); | |
247 | power_supply_changed(&pchg->psy->batt); | |
248 | } | |
249 | ||
250 | static irqreturn_t lp8727_isr_func(int irq, void *ptr) | |
251 | { | |
252 | struct lp8727_chg *pchg = ptr; | |
2165c8a4 | 253 | |
2a092582 | 254 | schedule_delayed_work(&pchg->work, pchg->debounce_jiffies); |
2165c8a4 WK |
255 | return IRQ_HANDLED; |
256 | } | |
257 | ||
d71fda01 | 258 | static int lp8727_setup_irq(struct lp8727_chg *pchg) |
2165c8a4 | 259 | { |
d71fda01 KM |
260 | int ret; |
261 | int irq = pchg->client->irq; | |
60fd57e0 KM |
262 | unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec : |
263 | DEFAULT_DEBOUNCE_MSEC; | |
264 | ||
2165c8a4 WK |
265 | INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func); |
266 | ||
d71fda01 KM |
267 | if (irq <= 0) { |
268 | dev_warn(pchg->dev, "invalid irq number: %d\n", irq); | |
269 | return 0; | |
270 | } | |
60fd57e0 | 271 | |
d71fda01 | 272 | ret = request_threaded_irq(irq, NULL, lp8727_isr_func, |
7c577c0d | 273 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
d71fda01 KM |
274 | "lp8727_irq", pchg); |
275 | ||
276 | if (ret) | |
277 | return ret; | |
278 | ||
279 | pchg->irq = irq; | |
280 | pchg->debounce_jiffies = msecs_to_jiffies(delay_msec); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static void lp8727_release_irq(struct lp8727_chg *pchg) | |
286 | { | |
287 | cancel_delayed_work_sync(&pchg->work); | |
288 | ||
289 | if (pchg->irq) | |
290 | free_irq(pchg->irq, pchg); | |
2165c8a4 WK |
291 | } |
292 | ||
293 | static enum power_supply_property lp8727_charger_prop[] = { | |
294 | POWER_SUPPLY_PROP_ONLINE, | |
295 | }; | |
296 | ||
297 | static enum power_supply_property lp8727_battery_prop[] = { | |
298 | POWER_SUPPLY_PROP_STATUS, | |
299 | POWER_SUPPLY_PROP_HEALTH, | |
300 | POWER_SUPPLY_PROP_PRESENT, | |
301 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
302 | POWER_SUPPLY_PROP_CAPACITY, | |
303 | POWER_SUPPLY_PROP_TEMP, | |
304 | }; | |
305 | ||
306 | static char *battery_supplied_to[] = { | |
307 | "main_batt", | |
308 | }; | |
309 | ||
310 | static int lp8727_charger_get_property(struct power_supply *psy, | |
311 | enum power_supply_property psp, | |
312 | union power_supply_propval *val) | |
313 | { | |
314 | struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent); | |
315 | ||
b59c93c0 KM |
316 | if (psp != POWER_SUPPLY_PROP_ONLINE) |
317 | return -EINVAL; | |
318 | ||
319 | val->intval = lp8727_is_charger_attached(psy->name, pchg->devid); | |
2165c8a4 WK |
320 | |
321 | return 0; | |
322 | } | |
323 | ||
b1ad0796 KM |
324 | static bool lp8727_is_high_temperature(enum lp8727_die_temp temp) |
325 | { | |
326 | switch (temp) { | |
327 | case LP8788_TEMP_95C: | |
328 | case LP8788_TEMP_115C: | |
329 | case LP8788_TEMP_135C: | |
330 | return true; | |
331 | default: | |
332 | return false; | |
333 | } | |
334 | } | |
335 | ||
2165c8a4 WK |
336 | static int lp8727_battery_get_property(struct power_supply *psy, |
337 | enum power_supply_property psp, | |
338 | union power_supply_propval *val) | |
339 | { | |
340 | struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent); | |
318cb389 | 341 | struct lp8727_platform_data *pdata = pchg->pdata; |
b1ad0796 | 342 | enum lp8727_die_temp temp; |
2165c8a4 WK |
343 | u8 read; |
344 | ||
345 | switch (psp) { | |
346 | case POWER_SUPPLY_PROP_STATUS: | |
e06374b0 KM |
347 | if (!lp8727_is_charger_attached(psy->name, pchg->devid)) { |
348 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
349 | return 0; | |
350 | } | |
351 | ||
352 | lp8727_read_byte(pchg, LP8727_STATUS1, &read); | |
faaae9bb | 353 | |
e06374b0 | 354 | val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ? |
faaae9bb KM |
355 | POWER_SUPPLY_STATUS_FULL : |
356 | POWER_SUPPLY_STATUS_CHARGING; | |
2165c8a4 WK |
357 | break; |
358 | case POWER_SUPPLY_PROP_HEALTH: | |
6029719f KM |
359 | lp8727_read_byte(pchg, LP8727_STATUS2, &read); |
360 | temp = (read & LP8727_TEMP_STAT) >> LP8727_TEMP_SHIFT; | |
b1ad0796 KM |
361 | |
362 | val->intval = lp8727_is_high_temperature(temp) ? | |
363 | POWER_SUPPLY_HEALTH_OVERHEAT : | |
364 | POWER_SUPPLY_HEALTH_GOOD; | |
2165c8a4 WK |
365 | break; |
366 | case POWER_SUPPLY_PROP_PRESENT: | |
318cb389 KM |
367 | if (!pdata) |
368 | return -EINVAL; | |
369 | ||
370 | if (pdata->get_batt_present) | |
f96b3074 | 371 | val->intval = pdata->get_batt_present(); |
2165c8a4 WK |
372 | break; |
373 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
318cb389 KM |
374 | if (!pdata) |
375 | return -EINVAL; | |
376 | ||
377 | if (pdata->get_batt_level) | |
f96b3074 | 378 | val->intval = pdata->get_batt_level(); |
2165c8a4 WK |
379 | break; |
380 | case POWER_SUPPLY_PROP_CAPACITY: | |
318cb389 KM |
381 | if (!pdata) |
382 | return -EINVAL; | |
383 | ||
384 | if (pdata->get_batt_capacity) | |
f96b3074 | 385 | val->intval = pdata->get_batt_capacity(); |
2165c8a4 WK |
386 | break; |
387 | case POWER_SUPPLY_PROP_TEMP: | |
318cb389 KM |
388 | if (!pdata) |
389 | return -EINVAL; | |
390 | ||
391 | if (pdata->get_batt_temp) | |
f96b3074 | 392 | val->intval = pdata->get_batt_temp(); |
2165c8a4 WK |
393 | break; |
394 | default: | |
395 | break; | |
396 | } | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | static void lp8727_charger_changed(struct power_supply *psy) | |
402 | { | |
403 | struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent); | |
20414e2e KM |
404 | u8 eoc_level; |
405 | u8 ichg; | |
2165c8a4 | 406 | u8 val; |
20414e2e KM |
407 | |
408 | /* skip if no charger exists */ | |
409 | if (!lp8727_is_charger_attached(psy->name, pchg->devid)) | |
410 | return; | |
411 | ||
412 | /* update charging parameters */ | |
56d99ed9 KM |
413 | if (pchg->chg_param) { |
414 | eoc_level = pchg->chg_param->eoc_level; | |
415 | ichg = pchg->chg_param->ichg; | |
20414e2e KM |
416 | val = (ichg << LP8727_ICHG_SHIFT) | eoc_level; |
417 | lp8727_write_byte(pchg, LP8727_CHGCTRL2, val); | |
2165c8a4 WK |
418 | } |
419 | } | |
420 | ||
421 | static int lp8727_register_psy(struct lp8727_chg *pchg) | |
422 | { | |
423 | struct lp8727_psy *psy; | |
424 | ||
74727c57 | 425 | psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL); |
2165c8a4 | 426 | if (!psy) |
6297b5e5 | 427 | return -ENOMEM; |
2165c8a4 WK |
428 | |
429 | pchg->psy = psy; | |
430 | ||
431 | psy->ac.name = "ac"; | |
432 | psy->ac.type = POWER_SUPPLY_TYPE_MAINS; | |
433 | psy->ac.properties = lp8727_charger_prop; | |
434 | psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop); | |
435 | psy->ac.get_property = lp8727_charger_get_property; | |
436 | psy->ac.supplied_to = battery_supplied_to; | |
437 | psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to); | |
438 | ||
439 | if (power_supply_register(pchg->dev, &psy->ac)) | |
6297b5e5 | 440 | goto err_psy_ac; |
2165c8a4 WK |
441 | |
442 | psy->usb.name = "usb"; | |
443 | psy->usb.type = POWER_SUPPLY_TYPE_USB; | |
444 | psy->usb.properties = lp8727_charger_prop; | |
445 | psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop); | |
446 | psy->usb.get_property = lp8727_charger_get_property; | |
447 | psy->usb.supplied_to = battery_supplied_to; | |
448 | psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to); | |
449 | ||
450 | if (power_supply_register(pchg->dev, &psy->usb)) | |
6297b5e5 | 451 | goto err_psy_usb; |
2165c8a4 WK |
452 | |
453 | psy->batt.name = "main_batt"; | |
454 | psy->batt.type = POWER_SUPPLY_TYPE_BATTERY; | |
455 | psy->batt.properties = lp8727_battery_prop; | |
456 | psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop); | |
457 | psy->batt.get_property = lp8727_battery_get_property; | |
458 | psy->batt.external_power_changed = lp8727_charger_changed; | |
459 | ||
460 | if (power_supply_register(pchg->dev, &psy->batt)) | |
6297b5e5 | 461 | goto err_psy_batt; |
2165c8a4 WK |
462 | |
463 | return 0; | |
464 | ||
6297b5e5 DN |
465 | err_psy_batt: |
466 | power_supply_unregister(&psy->usb); | |
467 | err_psy_usb: | |
468 | power_supply_unregister(&psy->ac); | |
469 | err_psy_ac: | |
2165c8a4 WK |
470 | return -EPERM; |
471 | } | |
472 | ||
473 | static void lp8727_unregister_psy(struct lp8727_chg *pchg) | |
474 | { | |
475 | struct lp8727_psy *psy = pchg->psy; | |
476 | ||
ce09affc KM |
477 | if (!psy) |
478 | return; | |
479 | ||
480 | power_supply_unregister(&psy->ac); | |
481 | power_supply_unregister(&psy->usb); | |
482 | power_supply_unregister(&psy->batt); | |
2165c8a4 WK |
483 | } |
484 | ||
17b4565b KM |
485 | #ifdef CONFIG_OF |
486 | static struct lp8727_chg_param | |
487 | *lp8727_parse_charge_pdata(struct device *dev, struct device_node *np) | |
488 | { | |
489 | struct lp8727_chg_param *param; | |
490 | ||
491 | param = devm_kzalloc(dev, sizeof(*param), GFP_KERNEL); | |
492 | if (!param) | |
493 | goto out; | |
494 | ||
495 | of_property_read_u8(np, "eoc-level", (u8 *)¶m->eoc_level); | |
496 | of_property_read_u8(np, "charging-current", (u8 *)¶m->ichg); | |
497 | out: | |
498 | return param; | |
499 | } | |
500 | ||
501 | static int lp8727_parse_dt(struct device *dev) | |
502 | { | |
503 | struct device_node *np = dev->of_node; | |
504 | struct device_node *child; | |
505 | struct lp8727_platform_data *pdata; | |
506 | const char *type; | |
507 | ||
508 | /* If charging parameter is not defined, just skip parsing the dt */ | |
509 | if (of_get_child_count(np) == 0) | |
510 | goto out; | |
511 | ||
512 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
513 | if (!pdata) | |
514 | return -ENOMEM; | |
515 | ||
516 | of_property_read_u32(np, "debounce-ms", &pdata->debounce_msec); | |
517 | ||
518 | for_each_child_of_node(np, child) { | |
519 | of_property_read_string(child, "charger-type", &type); | |
520 | ||
521 | if (!strcmp(type, "ac")) | |
522 | pdata->ac = lp8727_parse_charge_pdata(dev, child); | |
523 | ||
524 | if (!strcmp(type, "usb")) | |
525 | pdata->usb = lp8727_parse_charge_pdata(dev, child); | |
526 | } | |
527 | ||
528 | dev->platform_data = pdata; | |
529 | out: | |
530 | return 0; | |
531 | } | |
532 | #else | |
533 | static int lp8727_parse_dt(struct device *dev) | |
534 | { | |
535 | return 0; | |
536 | } | |
537 | #endif | |
538 | ||
2165c8a4 WK |
539 | static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id) |
540 | { | |
541 | struct lp8727_chg *pchg; | |
542 | int ret; | |
543 | ||
998a8e7a KM |
544 | if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) |
545 | return -EIO; | |
546 | ||
17b4565b KM |
547 | if (cl->dev.of_node) { |
548 | ret = lp8727_parse_dt(&cl->dev); | |
549 | if (ret) | |
550 | return ret; | |
551 | } | |
552 | ||
74727c57 | 553 | pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL); |
2165c8a4 WK |
554 | if (!pchg) |
555 | return -ENOMEM; | |
556 | ||
557 | pchg->client = cl; | |
558 | pchg->dev = &cl->dev; | |
559 | pchg->pdata = cl->dev.platform_data; | |
560 | i2c_set_clientdata(cl, pchg); | |
561 | ||
562 | mutex_init(&pchg->xfer_lock); | |
563 | ||
7da6334e KM |
564 | ret = lp8727_init_device(pchg); |
565 | if (ret) { | |
566 | dev_err(pchg->dev, "i2c communication err: %d", ret); | |
fb9adc51 | 567 | return ret; |
7da6334e KM |
568 | } |
569 | ||
fb9adc51 | 570 | ret = lp8727_register_psy(pchg); |
7da6334e | 571 | if (ret) { |
fb9adc51 KM |
572 | dev_err(pchg->dev, "power supplies register err: %d", ret); |
573 | return ret; | |
7da6334e | 574 | } |
2165c8a4 | 575 | |
d71fda01 | 576 | ret = lp8727_setup_irq(pchg); |
7da6334e | 577 | if (ret) { |
fb9adc51 KM |
578 | dev_err(pchg->dev, "irq handler err: %d", ret); |
579 | lp8727_unregister_psy(pchg); | |
580 | return ret; | |
7da6334e | 581 | } |
2165c8a4 WK |
582 | |
583 | return 0; | |
584 | } | |
585 | ||
415ec69f | 586 | static int lp8727_remove(struct i2c_client *cl) |
2165c8a4 WK |
587 | { |
588 | struct lp8727_chg *pchg = i2c_get_clientdata(cl); | |
589 | ||
d71fda01 | 590 | lp8727_release_irq(pchg); |
fb9adc51 | 591 | lp8727_unregister_psy(pchg); |
2165c8a4 WK |
592 | return 0; |
593 | } | |
594 | ||
17b4565b KM |
595 | static const struct of_device_id lp8727_dt_ids[] = { |
596 | { .compatible = "ti,lp8727", }, | |
597 | { } | |
598 | }; | |
599 | MODULE_DEVICE_TABLE(of, lp8727_dt_ids); | |
600 | ||
2165c8a4 WK |
601 | static const struct i2c_device_id lp8727_ids[] = { |
602 | {"lp8727", 0}, | |
455a0e2c | 603 | { } |
2165c8a4 | 604 | }; |
e2c5f7db | 605 | MODULE_DEVICE_TABLE(i2c, lp8727_ids); |
2165c8a4 WK |
606 | |
607 | static struct i2c_driver lp8727_driver = { | |
608 | .driver = { | |
609 | .name = "lp8727", | |
17b4565b | 610 | .of_match_table = of_match_ptr(lp8727_dt_ids), |
2165c8a4 WK |
611 | }, |
612 | .probe = lp8727_probe, | |
28ea73f4 | 613 | .remove = lp8727_remove, |
2165c8a4 WK |
614 | .id_table = lp8727_ids, |
615 | }; | |
5ff92e7a | 616 | module_i2c_driver(lp8727_driver); |
2165c8a4 | 617 | |
e39b828f | 618 | MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver"); |
18259cac | 619 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>, Daniel Jeong <daniel.jeong@ti.com>"); |
2165c8a4 | 620 | MODULE_LICENSE("GPL"); |