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72cd7995 DB |
1 | /* |
2 | * tps65010 - driver for tps6501x power management chips | |
3 | * | |
4 | * Copyright (C) 2004 Texas Instruments | |
5 | * Copyright (C) 2004-2005 David Brownell | |
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 as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
72cd7995 DB |
21 | |
22 | #include <linux/config.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/device.h> | |
29 | #include <linux/i2c.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/workqueue.h> | |
32 | #include <linux/suspend.h> | |
33 | #include <linux/debugfs.h> | |
34 | #include <linux/seq_file.h> | |
35 | ||
36 | #include <asm/irq.h> | |
37 | #include <asm/mach-types.h> | |
38 | ||
39 | #include <asm/arch/gpio.h> | |
40 | #include <asm/arch/mux.h> | |
41 | #include <asm/arch/tps65010.h> | |
42 | ||
43 | /*-------------------------------------------------------------------------*/ | |
44 | ||
45 | #define DRIVER_VERSION "2 May 2005" | |
46 | #define DRIVER_NAME (tps65010_driver.name) | |
47 | ||
48 | MODULE_DESCRIPTION("TPS6501x Power Management Driver"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
65fc50e5 | 51 | static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END }; |
72cd7995 DB |
52 | static unsigned short normal_i2c_range[] = { I2C_CLIENT_END }; |
53 | ||
54 | I2C_CLIENT_INSMOD; | |
55 | ||
56 | static struct i2c_driver tps65010_driver; | |
57 | ||
58 | /*-------------------------------------------------------------------------*/ | |
59 | ||
60 | /* This driver handles a family of multipurpose chips, which incorporate | |
61 | * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, | |
62 | * and other features often needed in portable devices like cell phones | |
63 | * or digital cameras. | |
64 | * | |
65 | * The tps65011 and tps65013 have different voltage settings compared | |
66 | * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. | |
67 | * All except tps65010 have "wait" mode, possibly defaulted so that | |
68 | * battery-insert != device-on. | |
69 | * | |
70 | * We could distinguish between some models by checking VDCDC1.UVLO or | |
71 | * other registers, unless they've been changed already after powerup | |
72 | * as part of board setup by a bootloader. | |
73 | */ | |
74 | enum tps_model { | |
75 | TPS_UNKNOWN = 0, | |
76 | TPS65010, | |
77 | TPS65011, | |
78 | TPS65012, | |
79 | TPS65013, | |
80 | }; | |
81 | ||
82 | struct tps65010 { | |
83 | struct i2c_client client; | |
84 | struct semaphore lock; | |
85 | int irq; | |
86 | struct work_struct work; | |
87 | struct dentry *file; | |
88 | unsigned charging:1; | |
89 | unsigned por:1; | |
90 | unsigned model:8; | |
91 | u16 vbus; | |
92 | unsigned long flags; | |
93 | #define FLAG_VBUS_CHANGED 0 | |
94 | #define FLAG_IRQ_ENABLE 1 | |
95 | ||
96 | /* copies of last register state */ | |
97 | u8 chgstatus, regstatus, chgconf; | |
98 | u8 nmask1, nmask2; | |
99 | ||
65fc50e5 | 100 | /* not currently tracking GPIO state */ |
72cd7995 DB |
101 | }; |
102 | ||
103 | #define POWER_POLL_DELAY msecs_to_jiffies(800) | |
104 | ||
105 | /*-------------------------------------------------------------------------*/ | |
106 | ||
107 | #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) | |
108 | ||
109 | static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) | |
110 | { | |
111 | snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", | |
112 | chgstatus, | |
113 | (chgstatus & TPS_CHG_USB) ? " USB" : "", | |
114 | (chgstatus & TPS_CHG_AC) ? " AC" : "", | |
115 | (chgstatus & TPS_CHG_THERM) ? " therm" : "", | |
116 | (chgstatus & TPS_CHG_TERM) ? " done" : | |
117 | ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
118 | ? " (charging)" : ""), | |
119 | (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", | |
120 | (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", | |
121 | (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", | |
122 | (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); | |
123 | } | |
124 | ||
125 | static void dbg_regstat(char *buf, size_t len, u8 regstatus) | |
126 | { | |
127 | snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", | |
128 | regstatus, | |
129 | (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", | |
130 | (regstatus & TPS_REG_COVER) ? " uncover" : "", | |
131 | (regstatus & TPS_REG_UVLO) ? " UVLO" : "", | |
132 | (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", | |
65fc50e5 | 133 | (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", |
72cd7995 DB |
134 | (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", |
135 | (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", | |
136 | (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); | |
137 | } | |
138 | ||
139 | static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) | |
140 | { | |
65fc50e5 | 141 | const char *hibit; |
72cd7995 DB |
142 | |
143 | if (por) | |
144 | hibit = (chgconfig & TPS_CHARGE_POR) | |
145 | ? "POR=69ms" : "POR=1sec"; | |
146 | else | |
147 | hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; | |
148 | ||
149 | snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", | |
150 | chgconfig, hibit, | |
151 | (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", | |
152 | (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", | |
153 | ({int p; switch ((chgconfig >> 3) & 3) { | |
154 | case 3: p = 100; break; | |
155 | case 2: p = 75; break; | |
156 | case 1: p = 50; break; | |
157 | default: p = 25; break; | |
158 | }; p; }), | |
159 | (chgconfig & TPS_VBUS_CHARGING) | |
160 | ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) | |
161 | : 0, | |
162 | (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); | |
163 | } | |
164 | ||
165 | #endif | |
166 | ||
167 | #ifdef DEBUG | |
168 | ||
169 | static void show_chgstatus(const char *label, u8 chgstatus) | |
170 | { | |
171 | char buf [100]; | |
172 | ||
173 | dbg_chgstat(buf, sizeof buf, chgstatus); | |
174 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
175 | } | |
176 | ||
177 | static void show_regstatus(const char *label, u8 regstatus) | |
178 | { | |
179 | char buf [100]; | |
180 | ||
181 | dbg_regstat(buf, sizeof buf, regstatus); | |
182 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
183 | } | |
184 | ||
185 | static void show_chgconfig(int por, const char *label, u8 chgconfig) | |
186 | { | |
187 | char buf [100]; | |
188 | ||
189 | dbg_chgconf(por, buf, sizeof buf, chgconfig); | |
190 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
191 | } | |
192 | ||
193 | #else | |
194 | ||
195 | static inline void show_chgstatus(const char *label, u8 chgstatus) { } | |
196 | static inline void show_regstatus(const char *label, u8 chgstatus) { } | |
197 | static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } | |
198 | ||
199 | #endif | |
200 | ||
201 | #ifdef CONFIG_DEBUG_FS | |
202 | ||
203 | static int dbg_show(struct seq_file *s, void *_) | |
204 | { | |
205 | struct tps65010 *tps = s->private; | |
206 | u8 value, v2; | |
207 | unsigned i; | |
208 | char buf[100]; | |
209 | const char *chip; | |
210 | ||
211 | switch (tps->model) { | |
212 | case TPS65010: chip = "tps65010"; break; | |
213 | case TPS65011: chip = "tps65011"; break; | |
214 | case TPS65012: chip = "tps65012"; break; | |
215 | case TPS65013: chip = "tps65013"; break; | |
216 | default: chip = NULL; break; | |
217 | } | |
218 | seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", | |
219 | DRIVER_NAME, DRIVER_VERSION, chip); | |
220 | ||
221 | down(&tps->lock); | |
222 | ||
223 | /* FIXME how can we tell whether a battery is present? | |
224 | * likely involves a charge gauging chip (like BQ26501). | |
225 | */ | |
226 | ||
227 | seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); | |
228 | ||
229 | ||
230 | /* registers for monitoring battery charging and status; note | |
231 | * that reading chgstat and regstat may ack IRQs... | |
232 | */ | |
233 | value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
234 | dbg_chgconf(tps->por, buf, sizeof buf, value); | |
235 | seq_printf(s, "chgconfig %s", buf); | |
236 | ||
237 | value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS); | |
238 | dbg_chgstat(buf, sizeof buf, value); | |
239 | seq_printf(s, "chgstat %s", buf); | |
240 | value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1); | |
241 | dbg_chgstat(buf, sizeof buf, value); | |
242 | seq_printf(s, "mask1 %s", buf); | |
243 | /* ignore ackint1 */ | |
244 | ||
245 | value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS); | |
246 | dbg_regstat(buf, sizeof buf, value); | |
247 | seq_printf(s, "regstat %s", buf); | |
248 | value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2); | |
249 | dbg_regstat(buf, sizeof buf, value); | |
250 | seq_printf(s, "mask2 %s\n", buf); | |
251 | /* ignore ackint2 */ | |
252 | ||
253 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
254 | ||
255 | ||
256 | /* VMAIN voltage, enable lowpower, etc */ | |
257 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1); | |
258 | seq_printf(s, "vdcdc1 %02x\n", value); | |
259 | ||
260 | /* VCORE voltage, vibrator on/off */ | |
261 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2); | |
262 | seq_printf(s, "vdcdc2 %02x\n", value); | |
263 | ||
264 | /* both LD0s, and their lowpower behavior */ | |
265 | value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1); | |
266 | seq_printf(s, "vregs1 %02x\n\n", value); | |
267 | ||
268 | ||
269 | /* LEDs and GPIOs */ | |
270 | value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON); | |
271 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER); | |
272 | seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", | |
273 | (value & 0x80) | |
274 | ? ((v2 & 0x80) ? "on" : "off") | |
275 | : ((v2 & 0x80) ? "blink" : "(nPG)"), | |
276 | value, v2, | |
277 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
278 | ||
279 | value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON); | |
280 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER); | |
281 | seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", | |
282 | (value & 0x80) | |
283 | ? ((v2 & 0x80) ? "on" : "off") | |
284 | : ((v2 & 0x80) ? "blink" : "off"), | |
285 | value, v2, | |
286 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
287 | ||
288 | value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO); | |
289 | v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3); | |
290 | seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); | |
291 | ||
292 | for (i = 0; i < 4; i++) { | |
65fc50e5 | 293 | if (value & (1 << (4 + i))) |
72cd7995 DB |
294 | seq_printf(s, " gpio%d-out %s\n", i + 1, |
295 | (value & (1 << i)) ? "low" : "hi "); | |
296 | else | |
297 | seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, | |
298 | (value & (1 << i)) ? "hi " : "low", | |
299 | (v2 & (1 << i)) ? "no-irq" : "irq", | |
300 | (v2 & (1 << (4 + i))) ? "rising" : "falling"); | |
301 | } | |
302 | ||
303 | up(&tps->lock); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | static int dbg_tps_open(struct inode *inode, struct file *file) | |
308 | { | |
309 | return single_open(file, dbg_show, inode->u.generic_ip); | |
310 | } | |
311 | ||
312 | static struct file_operations debug_fops = { | |
313 | .open = dbg_tps_open, | |
314 | .read = seq_read, | |
315 | .llseek = seq_lseek, | |
316 | .release = single_release, | |
317 | }; | |
318 | ||
319 | #define DEBUG_FOPS &debug_fops | |
320 | ||
321 | #else | |
322 | #define DEBUG_FOPS NULL | |
323 | #endif | |
324 | ||
325 | /*-------------------------------------------------------------------------*/ | |
326 | ||
327 | /* handle IRQS in a task context, so we can use I2C calls */ | |
328 | static void tps65010_interrupt(struct tps65010 *tps) | |
329 | { | |
330 | u8 tmp = 0, mask, poll; | |
331 | ||
332 | /* IRQs won't trigger irqs for certain events, but we can get | |
333 | * others by polling (normally, with external power applied). | |
334 | */ | |
335 | poll = 0; | |
336 | ||
337 | /* regstatus irqs */ | |
338 | if (tps->nmask2) { | |
339 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS); | |
340 | mask = tmp ^ tps->regstatus; | |
341 | tps->regstatus = tmp; | |
342 | mask &= tps->nmask2; | |
343 | } else | |
344 | mask = 0; | |
345 | if (mask) { | |
346 | tps->regstatus = tmp; | |
347 | /* may need to shut something down ... */ | |
348 | ||
349 | /* "off" usually means deep sleep */ | |
350 | if (tmp & TPS_REG_ONOFF) { | |
351 | pr_info("%s: power off button\n", DRIVER_NAME); | |
352 | #if 0 | |
353 | /* REVISIT: this might need its own workqueue | |
354 | * plus tweaks including deadlock avoidance ... | |
355 | */ | |
356 | software_suspend(); | |
357 | #endif | |
358 | poll = 1; | |
359 | } | |
360 | } | |
361 | ||
362 | /* chgstatus irqs */ | |
363 | if (tps->nmask1) { | |
364 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS); | |
365 | mask = tmp ^ tps->chgstatus; | |
366 | tps->chgstatus = tmp; | |
367 | mask &= tps->nmask1; | |
368 | } else | |
369 | mask = 0; | |
370 | if (mask) { | |
371 | unsigned charging = 0; | |
372 | ||
373 | show_chgstatus("chg/irq", tmp); | |
374 | if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) | |
375 | show_chgconfig(tps->por, "conf", tps->chgconf); | |
376 | ||
377 | /* Unless it was turned off or disabled, we charge any | |
378 | * battery whenever there's power available for it | |
379 | * and the charger hasn't been disabled. | |
380 | */ | |
381 | if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) | |
382 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
383 | && (tps->chgconf & TPS_CHARGE_ENABLE) | |
384 | ) { | |
385 | if (tps->chgstatus & TPS_CHG_USB) { | |
386 | /* VBUS options are readonly until reconnect */ | |
387 | if (mask & TPS_CHG_USB) | |
388 | set_bit(FLAG_VBUS_CHANGED, &tps->flags); | |
389 | charging = 1; | |
390 | } else if (tps->chgstatus & TPS_CHG_AC) | |
391 | charging = 1; | |
392 | } | |
393 | if (charging != tps->charging) { | |
394 | tps->charging = charging; | |
395 | pr_info("%s: battery %scharging\n", | |
396 | DRIVER_NAME, charging ? "" : | |
397 | ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
398 | ? "NOT " : "dis")); | |
399 | } | |
400 | } | |
401 | ||
402 | /* always poll to detect (a) power removal, without tps65013 | |
403 | * NO_CHG IRQ; or (b) restart of charging after stop. | |
404 | */ | |
405 | if ((tps->model != TPS65013 || !tps->charging) | |
406 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) | |
407 | poll = 1; | |
408 | if (poll) | |
409 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
410 | ||
411 | /* also potentially gpio-in rise or fall */ | |
412 | } | |
413 | ||
414 | /* handle IRQs and polling using keventd for now */ | |
415 | static void tps65010_work(void *_tps) | |
416 | { | |
417 | struct tps65010 *tps = _tps; | |
418 | ||
419 | down(&tps->lock); | |
420 | ||
421 | tps65010_interrupt(tps); | |
422 | ||
423 | if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { | |
424 | int status; | |
425 | u8 chgconfig, tmp; | |
426 | ||
427 | chgconfig = i2c_smbus_read_byte_data(&tps->client, | |
428 | TPS_CHGCONFIG); | |
429 | chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); | |
430 | if (tps->vbus == 500) | |
431 | chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; | |
432 | else if (tps->vbus >= 100) | |
433 | chgconfig |= TPS_VBUS_CHARGING; | |
434 | ||
435 | status = i2c_smbus_write_byte_data(&tps->client, | |
436 | TPS_CHGCONFIG, chgconfig); | |
437 | ||
438 | /* vbus update fails unless VBUS is connected! */ | |
439 | tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
440 | tps->chgconf = tmp; | |
441 | show_chgconfig(tps->por, "update vbus", tmp); | |
442 | } | |
443 | ||
444 | if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) | |
445 | enable_irq(tps->irq); | |
446 | ||
447 | up(&tps->lock); | |
448 | } | |
449 | ||
450 | static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs) | |
451 | { | |
452 | struct tps65010 *tps = _tps; | |
453 | ||
454 | disable_irq_nosync(irq); | |
455 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); | |
456 | (void) schedule_work(&tps->work); | |
457 | return IRQ_HANDLED; | |
458 | } | |
459 | ||
460 | /*-------------------------------------------------------------------------*/ | |
461 | ||
462 | static struct tps65010 *the_tps; | |
463 | ||
464 | static int __exit tps65010_detach_client(struct i2c_client *client) | |
465 | { | |
466 | struct tps65010 *tps; | |
467 | ||
468 | tps = container_of(client, struct tps65010, client); | |
469 | #ifdef CONFIG_ARM | |
470 | if (machine_is_omap_h2()) | |
471 | omap_free_gpio(58); | |
472 | if (machine_is_omap_osk()) | |
473 | omap_free_gpio(OMAP_MPUIO(1)); | |
474 | #endif | |
475 | free_irq(tps->irq, tps); | |
476 | debugfs_remove(tps->file); | |
477 | if (i2c_detach_client(client) == 0) | |
478 | kfree(tps); | |
65fc50e5 | 479 | the_tps = NULL; |
72cd7995 DB |
480 | return 0; |
481 | } | |
482 | ||
483 | static int tps65010_noscan(struct i2c_adapter *bus) | |
484 | { | |
485 | /* pure paranoia, in case someone adds another i2c bus | |
486 | * after our init section's gone... | |
487 | */ | |
488 | return -ENODEV; | |
489 | } | |
490 | ||
491 | /* no error returns, they'd just make bus scanning stop */ | |
492 | static int __init | |
493 | tps65010_probe(struct i2c_adapter *bus, int address, int kind) | |
494 | { | |
495 | struct tps65010 *tps; | |
496 | int status; | |
9ded96f2 | 497 | unsigned long irqflags; |
72cd7995 DB |
498 | |
499 | if (the_tps) { | |
500 | dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME); | |
501 | return 0; | |
502 | } | |
503 | ||
5263ebb5 | 504 | tps = kzalloc(sizeof *tps, GFP_KERNEL); |
72cd7995 DB |
505 | if (!tps) |
506 | return 0; | |
507 | ||
72cd7995 DB |
508 | init_MUTEX(&tps->lock); |
509 | INIT_WORK(&tps->work, tps65010_work, tps); | |
510 | tps->irq = -1; | |
511 | tps->client.addr = address; | |
72cd7995 DB |
512 | tps->client.adapter = bus; |
513 | tps->client.driver = &tps65010_driver; | |
514 | strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE); | |
515 | ||
516 | status = i2c_attach_client(&tps->client); | |
517 | if (status < 0) { | |
518 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
519 | DRIVER_NAME, address, status); | |
65fc50e5 | 520 | goto fail1; |
72cd7995 DB |
521 | } |
522 | ||
523 | #ifdef CONFIG_ARM | |
9ded96f2 | 524 | irqflags = SA_SAMPLE_RANDOM | SA_TRIGGER_LOW; |
72cd7995 DB |
525 | if (machine_is_omap_h2()) { |
526 | tps->model = TPS65010; | |
527 | omap_cfg_reg(W4_GPIO58); | |
528 | tps->irq = OMAP_GPIO_IRQ(58); | |
529 | omap_request_gpio(58); | |
530 | omap_set_gpio_direction(58, 1); | |
9ded96f2 | 531 | irqflags |= SA_TRIGGER_FALLING; |
72cd7995 DB |
532 | } |
533 | if (machine_is_omap_osk()) { | |
534 | tps->model = TPS65010; | |
535 | // omap_cfg_reg(U19_1610_MPUIO1); | |
536 | tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1)); | |
537 | omap_request_gpio(OMAP_MPUIO(1)); | |
538 | omap_set_gpio_direction(OMAP_MPUIO(1), 1); | |
9ded96f2 | 539 | irqflags |= SA_TRIGGER_FALLING; |
72cd7995 DB |
540 | } |
541 | if (machine_is_omap_h3()) { | |
542 | tps->model = TPS65013; | |
543 | ||
544 | // FIXME set up this board's IRQ ... | |
545 | } | |
546 | #else | |
9ded96f2 | 547 | irqflags = SA_SAMPLE_RANDOM; |
72cd7995 DB |
548 | #endif |
549 | ||
550 | if (tps->irq > 0) { | |
72cd7995 | 551 | status = request_irq(tps->irq, tps65010_irq, |
9ded96f2 | 552 | irqflags, DRIVER_NAME, tps); |
72cd7995 DB |
553 | if (status < 0) { |
554 | dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n", | |
555 | tps->irq, status); | |
556 | i2c_detach_client(&tps->client); | |
557 | goto fail1; | |
558 | } | |
559 | #ifdef CONFIG_ARM | |
560 | /* annoying race here, ideally we'd have an option | |
561 | * to claim the irq now and enable it later. | |
562 | */ | |
563 | disable_irq(tps->irq); | |
564 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); | |
565 | #endif | |
566 | } else | |
567 | printk(KERN_WARNING "%s: IRQ not configured!\n", | |
568 | DRIVER_NAME); | |
569 | ||
570 | ||
571 | switch (tps->model) { | |
572 | case TPS65010: | |
573 | case TPS65012: | |
574 | tps->por = 1; | |
575 | break; | |
576 | case TPS_UNKNOWN: | |
577 | printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME); | |
578 | break; | |
579 | /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ | |
580 | } | |
581 | tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); | |
582 | show_chgconfig(tps->por, "conf/init", tps->chgconf); | |
583 | ||
584 | show_chgstatus("chg/init", | |
585 | i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS)); | |
586 | show_regstatus("reg/init", | |
587 | i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS)); | |
588 | ||
589 | pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, | |
590 | i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1), | |
591 | i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2), | |
592 | i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1)); | |
593 | pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, | |
594 | i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO), | |
595 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); | |
596 | ||
597 | tps65010_driver.attach_adapter = tps65010_noscan; | |
598 | the_tps = tps; | |
599 | ||
600 | #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) | |
601 | /* USB hosts can't draw VBUS. OTG devices could, later | |
602 | * when OTG infrastructure enables it. USB peripherals | |
603 | * could be relying on VBUS while booting, though. | |
604 | */ | |
605 | tps->vbus = 100; | |
606 | #endif | |
607 | ||
608 | /* unmask the "interesting" irqs, then poll once to | |
609 | * kickstart monitoring, initialize shadowed status | |
610 | * registers, and maybe disable VBUS draw. | |
611 | */ | |
612 | tps->nmask1 = ~0; | |
613 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1); | |
614 | ||
615 | tps->nmask2 = TPS_REG_ONOFF; | |
616 | if (tps->model == TPS65013) | |
617 | tps->nmask2 |= TPS_REG_NO_CHG; | |
618 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2); | |
619 | ||
620 | (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f | |
621 | | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); | |
622 | ||
623 | tps65010_work(tps); | |
624 | ||
625 | tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, | |
626 | tps, DEBUG_FOPS); | |
627 | return 0; | |
65fc50e5 | 628 | fail1: |
629 | kfree(tps); | |
630 | return 0; | |
72cd7995 DB |
631 | } |
632 | ||
633 | static int __init tps65010_scan_bus(struct i2c_adapter *bus) | |
634 | { | |
635 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA)) | |
636 | return -EINVAL; | |
637 | return i2c_probe(bus, &addr_data, tps65010_probe); | |
638 | } | |
639 | ||
640 | static struct i2c_driver tps65010_driver = { | |
a9718b0c | 641 | .driver = { |
a9718b0c LR |
642 | .name = "tps65010", |
643 | }, | |
72cd7995 DB |
644 | .attach_adapter = tps65010_scan_bus, |
645 | .detach_client = __exit_p(tps65010_detach_client), | |
646 | }; | |
647 | ||
648 | /*-------------------------------------------------------------------------*/ | |
649 | ||
650 | /* Draw from VBUS: | |
651 | * 0 mA -- DON'T DRAW (might supply power instead) | |
652 | * 100 mA -- usb unit load (slowest charge rate) | |
653 | * 500 mA -- usb high power (fast battery charge) | |
654 | */ | |
655 | int tps65010_set_vbus_draw(unsigned mA) | |
656 | { | |
657 | unsigned long flags; | |
658 | ||
659 | if (!the_tps) | |
660 | return -ENODEV; | |
661 | ||
662 | /* assumes non-SMP */ | |
663 | local_irq_save(flags); | |
664 | if (mA >= 500) | |
665 | mA = 500; | |
666 | else if (mA >= 100) | |
667 | mA = 100; | |
668 | else | |
669 | mA = 0; | |
670 | the_tps->vbus = mA; | |
671 | if ((the_tps->chgstatus & TPS_CHG_USB) | |
672 | && test_and_set_bit( | |
673 | FLAG_VBUS_CHANGED, &the_tps->flags)) { | |
674 | /* gadget drivers call this in_irq() */ | |
675 | (void) schedule_work(&the_tps->work); | |
676 | } | |
677 | local_irq_restore(flags); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | EXPORT_SYMBOL(tps65010_set_vbus_draw); | |
682 | ||
683 | /*-------------------------------------------------------------------------*/ | |
684 | /* tps65010_set_gpio_out_value parameter: | |
685 | * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 | |
686 | * value: LOW or HIGH | |
687 | */ | |
688 | int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) | |
689 | { | |
690 | int status; | |
691 | unsigned defgpio; | |
692 | ||
693 | if (!the_tps) | |
694 | return -ENODEV; | |
695 | if ((gpio < GPIO1) || (gpio > GPIO4)) | |
696 | return -EINVAL; | |
697 | ||
698 | down(&the_tps->lock); | |
699 | ||
700 | defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO); | |
701 | ||
702 | /* Configure GPIO for output */ | |
703 | defgpio |= 1 << (gpio + 3); | |
704 | ||
705 | /* Writing 1 forces a logic 0 on that GPIO and vice versa */ | |
706 | switch (value) { | |
707 | case LOW: | |
708 | defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ | |
709 | break; | |
710 | /* case HIGH: */ | |
711 | default: | |
712 | defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ | |
713 | break; | |
714 | } | |
715 | ||
716 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
717 | TPS_DEFGPIO, defgpio); | |
718 | ||
719 | pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, | |
720 | gpio, value ? "high" : "low", | |
721 | i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO)); | |
722 | ||
723 | up(&the_tps->lock); | |
724 | return status; | |
725 | } | |
726 | EXPORT_SYMBOL(tps65010_set_gpio_out_value); | |
727 | ||
728 | /*-------------------------------------------------------------------------*/ | |
729 | /* tps65010_set_led parameter: | |
730 | * led: LED1 or LED2 | |
731 | * mode: ON, OFF or BLINK | |
732 | */ | |
733 | int tps65010_set_led(unsigned led, unsigned mode) | |
734 | { | |
735 | int status; | |
736 | unsigned led_on, led_per, offs; | |
737 | ||
738 | if (!the_tps) | |
739 | return -ENODEV; | |
740 | ||
65fc50e5 | 741 | if (led == LED1) |
72cd7995 DB |
742 | offs = 0; |
743 | else { | |
744 | offs = 2; | |
745 | led = LED2; | |
746 | } | |
747 | ||
748 | down(&the_tps->lock); | |
749 | ||
65fc50e5 | 750 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
751 | i2c_smbus_read_byte_data(&the_tps->client, | |
752 | TPS_LED1_ON + offs)); | |
72cd7995 | 753 | |
65fc50e5 | 754 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
755 | i2c_smbus_read_byte_data(&the_tps->client, | |
756 | TPS_LED1_PER + offs)); | |
72cd7995 DB |
757 | |
758 | switch (mode) { | |
759 | case OFF: | |
760 | led_on = 1 << 7; | |
761 | led_per = 0 << 7; | |
762 | break; | |
763 | case ON: | |
764 | led_on = 1 << 7; | |
765 | led_per = 1 << 7; | |
766 | break; | |
767 | case BLINK: | |
768 | led_on = 0x30 | (0 << 7); | |
769 | led_per = 0x08 | (1 << 7); | |
770 | break; | |
771 | default: | |
65fc50e5 | 772 | printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", |
72cd7995 DB |
773 | DRIVER_NAME); |
774 | up(&the_tps->lock); | |
775 | return -EINVAL; | |
776 | } | |
777 | ||
778 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
779 | TPS_LED1_ON + offs, led_on); | |
780 | ||
781 | if (status != 0) { | |
782 | printk(KERN_ERR "%s: Failed to write led%i_on register\n", | |
783 | DRIVER_NAME, led); | |
784 | up(&the_tps->lock); | |
785 | return status; | |
786 | } | |
787 | ||
65fc50e5 | 788 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
72cd7995 DB |
789 | i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs)); |
790 | ||
791 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
792 | TPS_LED1_PER + offs, led_per); | |
793 | ||
794 | if (status != 0) { | |
795 | printk(KERN_ERR "%s: Failed to write led%i_per register\n", | |
796 | DRIVER_NAME, led); | |
797 | up(&the_tps->lock); | |
798 | return status; | |
799 | } | |
800 | ||
65fc50e5 | 801 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
802 | i2c_smbus_read_byte_data(&the_tps->client, | |
803 | TPS_LED1_PER + offs)); | |
72cd7995 DB |
804 | |
805 | up(&the_tps->lock); | |
806 | ||
807 | return status; | |
808 | } | |
809 | EXPORT_SYMBOL(tps65010_set_led); | |
810 | ||
811 | /*-------------------------------------------------------------------------*/ | |
812 | /* tps65010_set_vib parameter: | |
813 | * value: ON or OFF | |
814 | */ | |
815 | int tps65010_set_vib(unsigned value) | |
816 | { | |
817 | int status; | |
818 | unsigned vdcdc2; | |
819 | ||
820 | if (!the_tps) | |
821 | return -ENODEV; | |
822 | ||
823 | down(&the_tps->lock); | |
824 | ||
825 | vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2); | |
826 | vdcdc2 &= ~(1 << 1); | |
827 | if (value) | |
828 | vdcdc2 |= (1 << 1); | |
829 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
830 | TPS_VDCDC2, vdcdc2); | |
831 | ||
832 | pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); | |
833 | ||
834 | up(&the_tps->lock); | |
835 | return status; | |
836 | } | |
837 | EXPORT_SYMBOL(tps65010_set_vib); | |
838 | ||
839 | /*-------------------------------------------------------------------------*/ | |
840 | /* tps65010_set_low_pwr parameter: | |
841 | * mode: ON or OFF | |
842 | */ | |
843 | int tps65010_set_low_pwr(unsigned mode) | |
844 | { | |
845 | int status; | |
846 | unsigned vdcdc1; | |
847 | ||
848 | if (!the_tps) | |
849 | return -ENODEV; | |
850 | ||
851 | down(&the_tps->lock); | |
852 | ||
853 | pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, | |
854 | mode ? "enable" : "disable", | |
855 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
856 | ||
857 | vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1); | |
858 | ||
859 | switch (mode) { | |
860 | case OFF: | |
861 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
862 | break; | |
863 | /* case ON: */ | |
864 | default: | |
865 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
866 | break; | |
867 | } | |
868 | ||
869 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
870 | TPS_VDCDC1, vdcdc1); | |
871 | ||
872 | if (status != 0) | |
873 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
65fc50e5 | 874 | DRIVER_NAME); |
72cd7995 DB |
875 | else |
876 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
877 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
878 | ||
879 | up(&the_tps->lock); | |
880 | ||
881 | return status; | |
882 | } | |
883 | EXPORT_SYMBOL(tps65010_set_low_pwr); | |
884 | ||
885 | /*-------------------------------------------------------------------------*/ | |
886 | /* tps65010_config_vregs1 parameter: | |
887 | * value to be written to VREGS1 register | |
888 | * Note: The complete register is written, set all bits you need | |
889 | */ | |
890 | int tps65010_config_vregs1(unsigned value) | |
891 | { | |
892 | int status; | |
893 | ||
894 | if (!the_tps) | |
895 | return -ENODEV; | |
896 | ||
897 | down(&the_tps->lock); | |
898 | ||
899 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
65fc50e5 | 900 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); |
72cd7995 DB |
901 | |
902 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
903 | TPS_VREGS1, value); | |
904 | ||
905 | if (status != 0) | |
906 | printk(KERN_ERR "%s: Failed to write vregs1 register\n", | |
65fc50e5 | 907 | DRIVER_NAME); |
72cd7995 DB |
908 | else |
909 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
910 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); | |
911 | ||
912 | up(&the_tps->lock); | |
913 | ||
914 | return status; | |
915 | } | |
916 | EXPORT_SYMBOL(tps65010_config_vregs1); | |
917 | ||
918 | /*-------------------------------------------------------------------------*/ | |
919 | /* tps65013_set_low_pwr parameter: | |
920 | * mode: ON or OFF | |
921 | */ | |
922 | ||
923 | /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not | |
924 | required if power supply is through a battery */ | |
925 | ||
926 | int tps65013_set_low_pwr(unsigned mode) | |
927 | { | |
928 | int status; | |
929 | unsigned vdcdc1, chgconfig; | |
930 | ||
931 | if (!the_tps || the_tps->por) | |
932 | return -ENODEV; | |
933 | ||
934 | down(&the_tps->lock); | |
935 | ||
936 | pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", | |
937 | DRIVER_NAME, | |
938 | mode ? "enable" : "disable", | |
939 | i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG), | |
940 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
941 | ||
942 | chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG); | |
943 | vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1); | |
944 | ||
945 | switch (mode) { | |
946 | case OFF: | |
947 | chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ | |
948 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
949 | break; | |
950 | /* case ON: */ | |
951 | default: | |
952 | chgconfig |= TPS65013_AUA; /* enable AUA bit */ | |
953 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
954 | break; | |
955 | } | |
956 | ||
957 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
958 | TPS_CHGCONFIG, chgconfig); | |
959 | if (status != 0) { | |
960 | printk(KERN_ERR "%s: Failed to write chconfig register\n", | |
961 | DRIVER_NAME); | |
962 | up(&the_tps->lock); | |
963 | return status; | |
964 | } | |
965 | ||
966 | chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG); | |
967 | the_tps->chgconf = chgconfig; | |
968 | show_chgconfig(0, "chgconf", chgconfig); | |
969 | ||
970 | status = i2c_smbus_write_byte_data(&the_tps->client, | |
971 | TPS_VDCDC1, vdcdc1); | |
972 | ||
973 | if (status != 0) | |
974 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
975 | DRIVER_NAME); | |
976 | else | |
977 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
978 | i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); | |
979 | ||
980 | up(&the_tps->lock); | |
981 | ||
982 | return status; | |
983 | } | |
984 | EXPORT_SYMBOL(tps65013_set_low_pwr); | |
985 | ||
986 | /*-------------------------------------------------------------------------*/ | |
987 | ||
988 | static int __init tps_init(void) | |
989 | { | |
990 | u32 tries = 3; | |
991 | int status = -ENODEV; | |
992 | ||
993 | printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); | |
994 | ||
995 | /* some boards have startup glitches */ | |
996 | while (tries--) { | |
997 | status = i2c_add_driver(&tps65010_driver); | |
998 | if (the_tps) | |
999 | break; | |
1000 | i2c_del_driver(&tps65010_driver); | |
1001 | if (!tries) { | |
1002 | printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); | |
1003 | return -ENODEV; | |
1004 | } | |
1005 | pr_debug("%s: re-probe ...\n", DRIVER_NAME); | |
1006 | msleep(10); | |
1007 | } | |
1008 | ||
65fc50e5 | 1009 | #ifdef CONFIG_ARM |
72cd7995 DB |
1010 | if (machine_is_omap_osk()) { |
1011 | ||
1012 | // FIXME: More should be placed in the initialization code | |
1013 | // of the submodules (DSP, ethernet, power management, | |
1014 | // board-osk.c). Careful: I2C is initialized "late". | |
1015 | ||
1016 | /* Let LED1 (D9) blink */ | |
1017 | tps65010_set_led(LED1, BLINK); | |
1018 | ||
1019 | /* Disable LED 2 (D2) */ | |
1020 | tps65010_set_led(LED2, OFF); | |
1021 | ||
1022 | /* Set GPIO 1 HIGH to disable VBUS power supply; | |
1023 | * OHCI driver powers it up/down as needed. | |
1024 | */ | |
1025 | tps65010_set_gpio_out_value(GPIO1, HIGH); | |
1026 | ||
1027 | /* Set GPIO 2 low to turn on LED D3 */ | |
1028 | tps65010_set_gpio_out_value(GPIO2, HIGH); | |
1029 | ||
1030 | /* Set GPIO 3 low to take ethernet out of reset */ | |
1031 | tps65010_set_gpio_out_value(GPIO3, LOW); | |
1032 | ||
1033 | /* gpio4 for VDD_DSP */ | |
1034 | ||
1035 | /* Enable LOW_PWR */ | |
1036 | tps65010_set_low_pwr(ON); | |
1037 | ||
1038 | /* Switch VLDO2 to 3.0V for AIC23 */ | |
1039 | tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE); | |
1040 | ||
1041 | } else if (machine_is_omap_h2()) { | |
1042 | /* gpio3 for SD, gpio4 for VDD_DSP */ | |
1043 | ||
1044 | /* Enable LOW_PWR */ | |
1045 | tps65010_set_low_pwr(ON); | |
1046 | } else if (machine_is_omap_h3()) { | |
1047 | /* gpio4 for SD, gpio3 for VDD_DSP */ | |
1048 | #ifdef CONFIG_PM | |
1049 | /* Enable LOW_PWR */ | |
1050 | tps65013_set_low_pwr(ON); | |
1051 | #endif | |
1052 | } | |
1053 | #endif | |
1054 | ||
1055 | return status; | |
1056 | } | |
1057 | /* NOTE: this MUST be initialized before the other parts of the system | |
1058 | * that rely on it ... but after the i2c bus on which this relies. | |
1059 | * That is, much earlier than on PC-type systems, which don't often use | |
1060 | * I2C as a core system bus. | |
1061 | */ | |
1062 | subsys_initcall(tps_init); | |
1063 | ||
1064 | static void __exit tps_exit(void) | |
1065 | { | |
1066 | i2c_del_driver(&tps65010_driver); | |
1067 | } | |
1068 | module_exit(tps_exit); | |
1069 |