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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 | 21 | |
72cd7995 DB |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/interrupt.h> | |
72cd7995 DB |
27 | #include <linux/i2c.h> |
28 | #include <linux/delay.h> | |
29 | #include <linux/workqueue.h> | |
72cd7995 DB |
30 | #include <linux/debugfs.h> |
31 | #include <linux/seq_file.h> | |
5c085d36 | 32 | #include <linux/mutex.h> |
79966fd9 | 33 | #include <linux/platform_device.h> |
72cd7995 | 34 | |
6d16bfb5 | 35 | #include <linux/i2c/tps65010.h> |
72cd7995 | 36 | |
79966fd9 DB |
37 | #include <asm/gpio.h> |
38 | ||
39 | ||
72cd7995 DB |
40 | /*-------------------------------------------------------------------------*/ |
41 | ||
42 | #define DRIVER_VERSION "2 May 2005" | |
4801bc25 | 43 | #define DRIVER_NAME (tps65010_driver.driver.name) |
72cd7995 DB |
44 | |
45 | MODULE_DESCRIPTION("TPS6501x Power Management Driver"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
72cd7995 DB |
48 | static struct i2c_driver tps65010_driver; |
49 | ||
50 | /*-------------------------------------------------------------------------*/ | |
51 | ||
52 | /* This driver handles a family of multipurpose chips, which incorporate | |
53 | * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, | |
54 | * and other features often needed in portable devices like cell phones | |
55 | * or digital cameras. | |
56 | * | |
57 | * The tps65011 and tps65013 have different voltage settings compared | |
58 | * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. | |
59 | * All except tps65010 have "wait" mode, possibly defaulted so that | |
60 | * battery-insert != device-on. | |
61 | * | |
62 | * We could distinguish between some models by checking VDCDC1.UVLO or | |
63 | * other registers, unless they've been changed already after powerup | |
64 | * as part of board setup by a bootloader. | |
65 | */ | |
66 | enum tps_model { | |
67 | TPS_UNKNOWN = 0, | |
68 | TPS65010, | |
69 | TPS65011, | |
70 | TPS65012, | |
71 | TPS65013, | |
72 | }; | |
73 | ||
74 | struct tps65010 { | |
b5067f8f | 75 | struct i2c_client *client; |
5c085d36 | 76 | struct mutex lock; |
8c1bc04e | 77 | struct delayed_work work; |
72cd7995 DB |
78 | struct dentry *file; |
79 | unsigned charging:1; | |
80 | unsigned por:1; | |
81 | unsigned model:8; | |
82 | u16 vbus; | |
83 | unsigned long flags; | |
84 | #define FLAG_VBUS_CHANGED 0 | |
85 | #define FLAG_IRQ_ENABLE 1 | |
86 | ||
87 | /* copies of last register state */ | |
88 | u8 chgstatus, regstatus, chgconf; | |
89 | u8 nmask1, nmask2; | |
90 | ||
79966fd9 DB |
91 | u8 outmask; |
92 | struct gpio_chip chip; | |
93 | struct platform_device *leds; | |
72cd7995 DB |
94 | }; |
95 | ||
4801bc25 | 96 | #define POWER_POLL_DELAY msecs_to_jiffies(5000) |
72cd7995 DB |
97 | |
98 | /*-------------------------------------------------------------------------*/ | |
99 | ||
100 | #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) | |
101 | ||
102 | static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) | |
103 | { | |
104 | snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", | |
105 | chgstatus, | |
106 | (chgstatus & TPS_CHG_USB) ? " USB" : "", | |
107 | (chgstatus & TPS_CHG_AC) ? " AC" : "", | |
108 | (chgstatus & TPS_CHG_THERM) ? " therm" : "", | |
109 | (chgstatus & TPS_CHG_TERM) ? " done" : | |
110 | ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
111 | ? " (charging)" : ""), | |
112 | (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", | |
113 | (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", | |
114 | (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", | |
115 | (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); | |
116 | } | |
117 | ||
118 | static void dbg_regstat(char *buf, size_t len, u8 regstatus) | |
119 | { | |
120 | snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", | |
121 | regstatus, | |
122 | (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", | |
123 | (regstatus & TPS_REG_COVER) ? " uncover" : "", | |
124 | (regstatus & TPS_REG_UVLO) ? " UVLO" : "", | |
125 | (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", | |
65fc50e5 | 126 | (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", |
72cd7995 DB |
127 | (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", |
128 | (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", | |
129 | (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); | |
130 | } | |
131 | ||
132 | static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) | |
133 | { | |
65fc50e5 | 134 | const char *hibit; |
72cd7995 DB |
135 | |
136 | if (por) | |
137 | hibit = (chgconfig & TPS_CHARGE_POR) | |
138 | ? "POR=69ms" : "POR=1sec"; | |
139 | else | |
140 | hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; | |
141 | ||
142 | snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", | |
143 | chgconfig, hibit, | |
144 | (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", | |
145 | (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", | |
146 | ({int p; switch ((chgconfig >> 3) & 3) { | |
147 | case 3: p = 100; break; | |
148 | case 2: p = 75; break; | |
149 | case 1: p = 50; break; | |
150 | default: p = 25; break; | |
151 | }; p; }), | |
152 | (chgconfig & TPS_VBUS_CHARGING) | |
153 | ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) | |
154 | : 0, | |
155 | (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); | |
156 | } | |
157 | ||
158 | #endif | |
159 | ||
160 | #ifdef DEBUG | |
161 | ||
162 | static void show_chgstatus(const char *label, u8 chgstatus) | |
163 | { | |
164 | char buf [100]; | |
165 | ||
166 | dbg_chgstat(buf, sizeof buf, chgstatus); | |
167 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
168 | } | |
169 | ||
170 | static void show_regstatus(const char *label, u8 regstatus) | |
171 | { | |
172 | char buf [100]; | |
173 | ||
174 | dbg_regstat(buf, sizeof buf, regstatus); | |
175 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
176 | } | |
177 | ||
178 | static void show_chgconfig(int por, const char *label, u8 chgconfig) | |
179 | { | |
180 | char buf [100]; | |
181 | ||
182 | dbg_chgconf(por, buf, sizeof buf, chgconfig); | |
183 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); | |
184 | } | |
185 | ||
186 | #else | |
187 | ||
188 | static inline void show_chgstatus(const char *label, u8 chgstatus) { } | |
189 | static inline void show_regstatus(const char *label, u8 chgstatus) { } | |
190 | static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } | |
191 | ||
192 | #endif | |
193 | ||
194 | #ifdef CONFIG_DEBUG_FS | |
195 | ||
196 | static int dbg_show(struct seq_file *s, void *_) | |
197 | { | |
198 | struct tps65010 *tps = s->private; | |
199 | u8 value, v2; | |
200 | unsigned i; | |
201 | char buf[100]; | |
202 | const char *chip; | |
203 | ||
204 | switch (tps->model) { | |
205 | case TPS65010: chip = "tps65010"; break; | |
206 | case TPS65011: chip = "tps65011"; break; | |
207 | case TPS65012: chip = "tps65012"; break; | |
208 | case TPS65013: chip = "tps65013"; break; | |
209 | default: chip = NULL; break; | |
210 | } | |
211 | seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", | |
212 | DRIVER_NAME, DRIVER_VERSION, chip); | |
213 | ||
5c085d36 | 214 | mutex_lock(&tps->lock); |
72cd7995 DB |
215 | |
216 | /* FIXME how can we tell whether a battery is present? | |
217 | * likely involves a charge gauging chip (like BQ26501). | |
218 | */ | |
219 | ||
220 | seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); | |
221 | ||
222 | ||
223 | /* registers for monitoring battery charging and status; note | |
224 | * that reading chgstat and regstat may ack IRQs... | |
225 | */ | |
b5067f8f | 226 | value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
72cd7995 DB |
227 | dbg_chgconf(tps->por, buf, sizeof buf, value); |
228 | seq_printf(s, "chgconfig %s", buf); | |
229 | ||
b5067f8f | 230 | value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
72cd7995 DB |
231 | dbg_chgstat(buf, sizeof buf, value); |
232 | seq_printf(s, "chgstat %s", buf); | |
b5067f8f | 233 | value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1); |
72cd7995 DB |
234 | dbg_chgstat(buf, sizeof buf, value); |
235 | seq_printf(s, "mask1 %s", buf); | |
236 | /* ignore ackint1 */ | |
237 | ||
b5067f8f | 238 | value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
72cd7995 DB |
239 | dbg_regstat(buf, sizeof buf, value); |
240 | seq_printf(s, "regstat %s", buf); | |
b5067f8f | 241 | value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2); |
72cd7995 DB |
242 | dbg_regstat(buf, sizeof buf, value); |
243 | seq_printf(s, "mask2 %s\n", buf); | |
244 | /* ignore ackint2 */ | |
245 | ||
246 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
247 | ||
248 | ||
249 | /* VMAIN voltage, enable lowpower, etc */ | |
b5067f8f | 250 | value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1); |
72cd7995 DB |
251 | seq_printf(s, "vdcdc1 %02x\n", value); |
252 | ||
253 | /* VCORE voltage, vibrator on/off */ | |
b5067f8f | 254 | value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2); |
72cd7995 DB |
255 | seq_printf(s, "vdcdc2 %02x\n", value); |
256 | ||
257 | /* both LD0s, and their lowpower behavior */ | |
b5067f8f | 258 | value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1); |
72cd7995 DB |
259 | seq_printf(s, "vregs1 %02x\n\n", value); |
260 | ||
261 | ||
262 | /* LEDs and GPIOs */ | |
b5067f8f DB |
263 | value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON); |
264 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER); | |
72cd7995 DB |
265 | seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", |
266 | (value & 0x80) | |
267 | ? ((v2 & 0x80) ? "on" : "off") | |
268 | : ((v2 & 0x80) ? "blink" : "(nPG)"), | |
269 | value, v2, | |
270 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
271 | ||
b5067f8f DB |
272 | value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON); |
273 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER); | |
72cd7995 DB |
274 | seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", |
275 | (value & 0x80) | |
276 | ? ((v2 & 0x80) ? "on" : "off") | |
277 | : ((v2 & 0x80) ? "blink" : "off"), | |
278 | value, v2, | |
279 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); | |
280 | ||
b5067f8f DB |
281 | value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); |
282 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3); | |
72cd7995 DB |
283 | seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); |
284 | ||
285 | for (i = 0; i < 4; i++) { | |
65fc50e5 | 286 | if (value & (1 << (4 + i))) |
72cd7995 DB |
287 | seq_printf(s, " gpio%d-out %s\n", i + 1, |
288 | (value & (1 << i)) ? "low" : "hi "); | |
289 | else | |
290 | seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, | |
291 | (value & (1 << i)) ? "hi " : "low", | |
292 | (v2 & (1 << i)) ? "no-irq" : "irq", | |
293 | (v2 & (1 << (4 + i))) ? "rising" : "falling"); | |
294 | } | |
295 | ||
5c085d36 | 296 | mutex_unlock(&tps->lock); |
72cd7995 DB |
297 | return 0; |
298 | } | |
299 | ||
300 | static int dbg_tps_open(struct inode *inode, struct file *file) | |
301 | { | |
8e18e294 | 302 | return single_open(file, dbg_show, inode->i_private); |
72cd7995 DB |
303 | } |
304 | ||
2b8693c0 | 305 | static const struct file_operations debug_fops = { |
72cd7995 DB |
306 | .open = dbg_tps_open, |
307 | .read = seq_read, | |
308 | .llseek = seq_lseek, | |
309 | .release = single_release, | |
310 | }; | |
311 | ||
312 | #define DEBUG_FOPS &debug_fops | |
313 | ||
314 | #else | |
315 | #define DEBUG_FOPS NULL | |
316 | #endif | |
317 | ||
318 | /*-------------------------------------------------------------------------*/ | |
319 | ||
320 | /* handle IRQS in a task context, so we can use I2C calls */ | |
321 | static void tps65010_interrupt(struct tps65010 *tps) | |
322 | { | |
323 | u8 tmp = 0, mask, poll; | |
324 | ||
8c1bc04e | 325 | /* IRQs won't trigger for certain events, but we can get |
72cd7995 DB |
326 | * others by polling (normally, with external power applied). |
327 | */ | |
328 | poll = 0; | |
329 | ||
330 | /* regstatus irqs */ | |
331 | if (tps->nmask2) { | |
b5067f8f | 332 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
72cd7995 DB |
333 | mask = tmp ^ tps->regstatus; |
334 | tps->regstatus = tmp; | |
335 | mask &= tps->nmask2; | |
336 | } else | |
337 | mask = 0; | |
338 | if (mask) { | |
339 | tps->regstatus = tmp; | |
340 | /* may need to shut something down ... */ | |
341 | ||
342 | /* "off" usually means deep sleep */ | |
343 | if (tmp & TPS_REG_ONOFF) { | |
344 | pr_info("%s: power off button\n", DRIVER_NAME); | |
345 | #if 0 | |
346 | /* REVISIT: this might need its own workqueue | |
347 | * plus tweaks including deadlock avoidance ... | |
ab3bfca7 | 348 | * also needs to get error handling and probably |
b0cb1a19 | 349 | * an #ifdef CONFIG_HIBERNATION |
72cd7995 | 350 | */ |
a3d25c27 | 351 | hibernate(); |
72cd7995 DB |
352 | #endif |
353 | poll = 1; | |
354 | } | |
355 | } | |
356 | ||
357 | /* chgstatus irqs */ | |
358 | if (tps->nmask1) { | |
b5067f8f | 359 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
72cd7995 DB |
360 | mask = tmp ^ tps->chgstatus; |
361 | tps->chgstatus = tmp; | |
362 | mask &= tps->nmask1; | |
363 | } else | |
364 | mask = 0; | |
365 | if (mask) { | |
366 | unsigned charging = 0; | |
367 | ||
368 | show_chgstatus("chg/irq", tmp); | |
369 | if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) | |
370 | show_chgconfig(tps->por, "conf", tps->chgconf); | |
371 | ||
372 | /* Unless it was turned off or disabled, we charge any | |
373 | * battery whenever there's power available for it | |
374 | * and the charger hasn't been disabled. | |
375 | */ | |
376 | if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) | |
377 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
378 | && (tps->chgconf & TPS_CHARGE_ENABLE) | |
379 | ) { | |
380 | if (tps->chgstatus & TPS_CHG_USB) { | |
381 | /* VBUS options are readonly until reconnect */ | |
382 | if (mask & TPS_CHG_USB) | |
383 | set_bit(FLAG_VBUS_CHANGED, &tps->flags); | |
384 | charging = 1; | |
385 | } else if (tps->chgstatus & TPS_CHG_AC) | |
386 | charging = 1; | |
387 | } | |
388 | if (charging != tps->charging) { | |
389 | tps->charging = charging; | |
390 | pr_info("%s: battery %scharging\n", | |
391 | DRIVER_NAME, charging ? "" : | |
392 | ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) | |
393 | ? "NOT " : "dis")); | |
394 | } | |
395 | } | |
396 | ||
397 | /* always poll to detect (a) power removal, without tps65013 | |
398 | * NO_CHG IRQ; or (b) restart of charging after stop. | |
399 | */ | |
400 | if ((tps->model != TPS65013 || !tps->charging) | |
401 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) | |
402 | poll = 1; | |
403 | if (poll) | |
404 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); | |
405 | ||
406 | /* also potentially gpio-in rise or fall */ | |
407 | } | |
408 | ||
409 | /* handle IRQs and polling using keventd for now */ | |
8c1bc04e | 410 | static void tps65010_work(struct work_struct *work) |
72cd7995 | 411 | { |
8c1bc04e | 412 | struct tps65010 *tps; |
72cd7995 | 413 | |
8c1bc04e | 414 | tps = container_of(work, struct tps65010, work.work); |
5c085d36 | 415 | mutex_lock(&tps->lock); |
72cd7995 DB |
416 | |
417 | tps65010_interrupt(tps); | |
418 | ||
419 | if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { | |
420 | int status; | |
421 | u8 chgconfig, tmp; | |
422 | ||
b5067f8f | 423 | chgconfig = i2c_smbus_read_byte_data(tps->client, |
72cd7995 DB |
424 | TPS_CHGCONFIG); |
425 | chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); | |
426 | if (tps->vbus == 500) | |
427 | chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; | |
428 | else if (tps->vbus >= 100) | |
429 | chgconfig |= TPS_VBUS_CHARGING; | |
430 | ||
b5067f8f | 431 | status = i2c_smbus_write_byte_data(tps->client, |
72cd7995 DB |
432 | TPS_CHGCONFIG, chgconfig); |
433 | ||
434 | /* vbus update fails unless VBUS is connected! */ | |
b5067f8f | 435 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
72cd7995 DB |
436 | tps->chgconf = tmp; |
437 | show_chgconfig(tps->por, "update vbus", tmp); | |
438 | } | |
439 | ||
440 | if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) | |
8056c6cb | 441 | enable_irq(tps->client->irq); |
72cd7995 | 442 | |
5c085d36 | 443 | mutex_unlock(&tps->lock); |
72cd7995 DB |
444 | } |
445 | ||
7d12e780 | 446 | static irqreturn_t tps65010_irq(int irq, void *_tps) |
72cd7995 DB |
447 | { |
448 | struct tps65010 *tps = _tps; | |
449 | ||
450 | disable_irq_nosync(irq); | |
451 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); | |
8c1bc04e | 452 | (void) schedule_work(&tps->work.work); |
72cd7995 DB |
453 | return IRQ_HANDLED; |
454 | } | |
455 | ||
79966fd9 DB |
456 | /*-------------------------------------------------------------------------*/ |
457 | ||
458 | /* offsets 0..3 == GPIO1..GPIO4 | |
459 | * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) | |
460 | */ | |
461 | static void | |
462 | tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
463 | { | |
464 | if (offset < 4) | |
465 | tps65010_set_gpio_out_value(offset + 1, value); | |
466 | else | |
467 | tps65010_set_led(offset - 3, value ? ON : OFF); | |
468 | } | |
469 | ||
470 | static int | |
471 | tps65010_output(struct gpio_chip *chip, unsigned offset, int value) | |
472 | { | |
473 | /* GPIOs may be input-only */ | |
474 | if (offset < 4) { | |
475 | struct tps65010 *tps; | |
476 | ||
477 | tps = container_of(chip, struct tps65010, chip); | |
478 | if (!(tps->outmask & (1 << offset))) | |
479 | return -EINVAL; | |
480 | tps65010_set_gpio_out_value(offset + 1, value); | |
481 | } else | |
482 | tps65010_set_led(offset - 3, value ? ON : OFF); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) | |
488 | { | |
489 | int value; | |
490 | struct tps65010 *tps; | |
491 | ||
492 | tps = container_of(chip, struct tps65010, chip); | |
493 | ||
494 | if (offset < 4) { | |
495 | value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); | |
496 | if (value < 0) | |
497 | return 0; | |
498 | if (value & (1 << (offset + 4))) /* output */ | |
499 | return !(value & (1 << offset)); | |
500 | else /* input */ | |
501 | return (value & (1 << offset)); | |
502 | } | |
503 | ||
504 | /* REVISIT we *could* report LED1/nPG and LED2 state ... */ | |
505 | return 0; | |
506 | } | |
507 | ||
508 | ||
72cd7995 DB |
509 | /*-------------------------------------------------------------------------*/ |
510 | ||
511 | static struct tps65010 *the_tps; | |
512 | ||
8056c6cb | 513 | static int __exit tps65010_remove(struct i2c_client *client) |
72cd7995 | 514 | { |
8056c6cb | 515 | struct tps65010 *tps = i2c_get_clientdata(client); |
79966fd9 | 516 | struct tps65010_board *board = client->dev.platform_data; |
72cd7995 | 517 | |
79966fd9 DB |
518 | if (board && board->teardown) { |
519 | int status = board->teardown(client, board->context); | |
520 | if (status < 0) | |
521 | dev_dbg(&client->dev, "board %s %s err %d\n", | |
522 | "teardown", client->name, status); | |
523 | } | |
8056c6cb DB |
524 | if (client->irq > 0) |
525 | free_irq(client->irq, tps); | |
8c1bc04e DB |
526 | cancel_delayed_work(&tps->work); |
527 | flush_scheduled_work(); | |
72cd7995 | 528 | debugfs_remove(tps->file); |
8056c6cb | 529 | kfree(tps); |
65fc50e5 | 530 | the_tps = NULL; |
72cd7995 DB |
531 | return 0; |
532 | } | |
533 | ||
8056c6cb | 534 | static int tps65010_probe(struct i2c_client *client) |
72cd7995 DB |
535 | { |
536 | struct tps65010 *tps; | |
537 | int status; | |
79966fd9 | 538 | struct tps65010_board *board = client->dev.platform_data; |
72cd7995 DB |
539 | |
540 | if (the_tps) { | |
8056c6cb DB |
541 | dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); |
542 | return -ENODEV; | |
72cd7995 DB |
543 | } |
544 | ||
8056c6cb DB |
545 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
546 | return -EINVAL; | |
547 | ||
5263ebb5 | 548 | tps = kzalloc(sizeof *tps, GFP_KERNEL); |
72cd7995 | 549 | if (!tps) |
8056c6cb | 550 | return -ENOMEM; |
72cd7995 | 551 | |
5c085d36 | 552 | mutex_init(&tps->lock); |
8c1bc04e | 553 | INIT_DELAYED_WORK(&tps->work, tps65010_work); |
8056c6cb | 554 | tps->client = client; |
72cd7995 | 555 | |
8056c6cb | 556 | if (strcmp(client->name, "tps65010") == 0) |
72cd7995 | 557 | tps->model = TPS65010; |
8056c6cb DB |
558 | else if (strcmp(client->name, "tps65011") == 0) |
559 | tps->model = TPS65011; | |
560 | else if (strcmp(client->name, "tps65012") == 0) | |
561 | tps->model = TPS65012; | |
562 | else if (strcmp(client->name, "tps65013") == 0) | |
72cd7995 | 563 | tps->model = TPS65013; |
8056c6cb DB |
564 | else { |
565 | dev_warn(&client->dev, "unknown chip '%s'\n", client->name); | |
566 | status = -ENODEV; | |
567 | goto fail1; | |
72cd7995 | 568 | } |
72cd7995 | 569 | |
8056c6cb DB |
570 | /* the IRQ is active low, but many gpio lines can't support that |
571 | * so this driver uses falling-edge triggers instead. | |
572 | */ | |
573 | if (client->irq > 0) { | |
574 | status = request_irq(client->irq, tps65010_irq, | |
575 | IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING, | |
576 | DRIVER_NAME, tps); | |
72cd7995 | 577 | if (status < 0) { |
b5067f8f | 578 | dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", |
8056c6cb | 579 | client->irq, status); |
72cd7995 DB |
580 | goto fail1; |
581 | } | |
72cd7995 DB |
582 | /* annoying race here, ideally we'd have an option |
583 | * to claim the irq now and enable it later. | |
8056c6cb | 584 | * FIXME genirq IRQF_NOAUTOEN now solves that ... |
72cd7995 | 585 | */ |
8056c6cb | 586 | disable_irq(client->irq); |
72cd7995 | 587 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); |
72cd7995 | 588 | } else |
8056c6cb | 589 | dev_warn(&client->dev, "IRQ not configured!\n"); |
72cd7995 DB |
590 | |
591 | ||
592 | switch (tps->model) { | |
593 | case TPS65010: | |
594 | case TPS65012: | |
595 | tps->por = 1; | |
596 | break; | |
597 | case TPS_UNKNOWN: | |
598 | printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME); | |
599 | break; | |
600 | /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ | |
601 | } | |
b5067f8f | 602 | tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); |
72cd7995 DB |
603 | show_chgconfig(tps->por, "conf/init", tps->chgconf); |
604 | ||
605 | show_chgstatus("chg/init", | |
b5067f8f | 606 | i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); |
72cd7995 | 607 | show_regstatus("reg/init", |
b5067f8f | 608 | i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); |
72cd7995 DB |
609 | |
610 | pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, | |
b5067f8f DB |
611 | i2c_smbus_read_byte_data(client, TPS_VDCDC1), |
612 | i2c_smbus_read_byte_data(client, TPS_VDCDC2), | |
613 | i2c_smbus_read_byte_data(client, TPS_VREGS1)); | |
72cd7995 | 614 | pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, |
b5067f8f DB |
615 | i2c_smbus_read_byte_data(client, TPS_DEFGPIO), |
616 | i2c_smbus_read_byte_data(client, TPS_MASK3)); | |
72cd7995 | 617 | |
72cd7995 DB |
618 | the_tps = tps; |
619 | ||
620 | #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) | |
621 | /* USB hosts can't draw VBUS. OTG devices could, later | |
622 | * when OTG infrastructure enables it. USB peripherals | |
623 | * could be relying on VBUS while booting, though. | |
624 | */ | |
625 | tps->vbus = 100; | |
626 | #endif | |
627 | ||
628 | /* unmask the "interesting" irqs, then poll once to | |
629 | * kickstart monitoring, initialize shadowed status | |
630 | * registers, and maybe disable VBUS draw. | |
631 | */ | |
632 | tps->nmask1 = ~0; | |
b5067f8f | 633 | (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); |
72cd7995 DB |
634 | |
635 | tps->nmask2 = TPS_REG_ONOFF; | |
636 | if (tps->model == TPS65013) | |
637 | tps->nmask2 |= TPS_REG_NO_CHG; | |
b5067f8f | 638 | (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); |
72cd7995 | 639 | |
b5067f8f DB |
640 | (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f |
641 | | i2c_smbus_read_byte_data(client, TPS_MASK3)); | |
72cd7995 | 642 | |
8c1bc04e | 643 | tps65010_work(&tps->work.work); |
72cd7995 DB |
644 | |
645 | tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, | |
646 | tps, DEBUG_FOPS); | |
79966fd9 DB |
647 | |
648 | /* optionally register GPIOs */ | |
649 | if (board && board->base > 0) { | |
650 | tps->outmask = board->outmask; | |
651 | ||
652 | tps->chip.label = client->name; | |
653 | ||
654 | tps->chip.set = tps65010_gpio_set; | |
655 | tps->chip.direction_output = tps65010_output; | |
656 | ||
657 | /* NOTE: only partial support for inputs; nyet IRQs */ | |
658 | tps->chip.get = tps65010_gpio_get; | |
659 | ||
660 | tps->chip.base = board->base; | |
661 | tps->chip.ngpio = 6; | |
662 | tps->chip.can_sleep = 1; | |
663 | ||
664 | status = gpiochip_add(&tps->chip); | |
665 | if (status < 0) | |
666 | dev_err(&client->dev, "can't add gpiochip, err %d\n", | |
667 | status); | |
668 | else if (board->setup) { | |
669 | status = board->setup(client, board->context); | |
670 | if (status < 0) { | |
671 | dev_dbg(&client->dev, | |
672 | "board %s %s err %d\n", | |
673 | "setup", client->name, status); | |
674 | status = 0; | |
675 | } | |
676 | } | |
677 | } | |
678 | ||
72cd7995 | 679 | return 0; |
65fc50e5 DB |
680 | fail1: |
681 | kfree(tps); | |
8056c6cb | 682 | return status; |
72cd7995 DB |
683 | } |
684 | ||
685 | static struct i2c_driver tps65010_driver = { | |
a9718b0c | 686 | .driver = { |
a9718b0c LR |
687 | .name = "tps65010", |
688 | }, | |
8056c6cb DB |
689 | .probe = tps65010_probe, |
690 | .remove = __exit_p(tps65010_remove), | |
72cd7995 DB |
691 | }; |
692 | ||
693 | /*-------------------------------------------------------------------------*/ | |
694 | ||
695 | /* Draw from VBUS: | |
696 | * 0 mA -- DON'T DRAW (might supply power instead) | |
697 | * 100 mA -- usb unit load (slowest charge rate) | |
698 | * 500 mA -- usb high power (fast battery charge) | |
699 | */ | |
700 | int tps65010_set_vbus_draw(unsigned mA) | |
701 | { | |
702 | unsigned long flags; | |
703 | ||
704 | if (!the_tps) | |
705 | return -ENODEV; | |
706 | ||
707 | /* assumes non-SMP */ | |
708 | local_irq_save(flags); | |
709 | if (mA >= 500) | |
710 | mA = 500; | |
711 | else if (mA >= 100) | |
712 | mA = 100; | |
713 | else | |
714 | mA = 0; | |
715 | the_tps->vbus = mA; | |
716 | if ((the_tps->chgstatus & TPS_CHG_USB) | |
717 | && test_and_set_bit( | |
718 | FLAG_VBUS_CHANGED, &the_tps->flags)) { | |
719 | /* gadget drivers call this in_irq() */ | |
8c1bc04e | 720 | (void) schedule_work(&the_tps->work.work); |
72cd7995 DB |
721 | } |
722 | local_irq_restore(flags); | |
723 | ||
724 | return 0; | |
725 | } | |
726 | EXPORT_SYMBOL(tps65010_set_vbus_draw); | |
727 | ||
728 | /*-------------------------------------------------------------------------*/ | |
729 | /* tps65010_set_gpio_out_value parameter: | |
730 | * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 | |
731 | * value: LOW or HIGH | |
732 | */ | |
733 | int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) | |
734 | { | |
735 | int status; | |
736 | unsigned defgpio; | |
737 | ||
738 | if (!the_tps) | |
739 | return -ENODEV; | |
740 | if ((gpio < GPIO1) || (gpio > GPIO4)) | |
741 | return -EINVAL; | |
742 | ||
5c085d36 | 743 | mutex_lock(&the_tps->lock); |
72cd7995 | 744 | |
b5067f8f | 745 | defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); |
72cd7995 DB |
746 | |
747 | /* Configure GPIO for output */ | |
748 | defgpio |= 1 << (gpio + 3); | |
749 | ||
750 | /* Writing 1 forces a logic 0 on that GPIO and vice versa */ | |
751 | switch (value) { | |
752 | case LOW: | |
753 | defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ | |
754 | break; | |
755 | /* case HIGH: */ | |
756 | default: | |
757 | defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ | |
758 | break; | |
759 | } | |
760 | ||
b5067f8f | 761 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
762 | TPS_DEFGPIO, defgpio); |
763 | ||
764 | pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, | |
765 | gpio, value ? "high" : "low", | |
b5067f8f | 766 | i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); |
72cd7995 | 767 | |
5c085d36 | 768 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
769 | return status; |
770 | } | |
771 | EXPORT_SYMBOL(tps65010_set_gpio_out_value); | |
772 | ||
773 | /*-------------------------------------------------------------------------*/ | |
774 | /* tps65010_set_led parameter: | |
775 | * led: LED1 or LED2 | |
776 | * mode: ON, OFF or BLINK | |
777 | */ | |
778 | int tps65010_set_led(unsigned led, unsigned mode) | |
779 | { | |
780 | int status; | |
781 | unsigned led_on, led_per, offs; | |
782 | ||
783 | if (!the_tps) | |
784 | return -ENODEV; | |
785 | ||
65fc50e5 | 786 | if (led == LED1) |
72cd7995 DB |
787 | offs = 0; |
788 | else { | |
789 | offs = 2; | |
790 | led = LED2; | |
791 | } | |
792 | ||
5c085d36 | 793 | mutex_lock(&the_tps->lock); |
72cd7995 | 794 | |
65fc50e5 | 795 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
b5067f8f | 796 | i2c_smbus_read_byte_data(the_tps->client, |
65fc50e5 | 797 | TPS_LED1_ON + offs)); |
72cd7995 | 798 | |
65fc50e5 | 799 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
b5067f8f | 800 | i2c_smbus_read_byte_data(the_tps->client, |
65fc50e5 | 801 | TPS_LED1_PER + offs)); |
72cd7995 DB |
802 | |
803 | switch (mode) { | |
804 | case OFF: | |
805 | led_on = 1 << 7; | |
806 | led_per = 0 << 7; | |
807 | break; | |
808 | case ON: | |
809 | led_on = 1 << 7; | |
810 | led_per = 1 << 7; | |
811 | break; | |
812 | case BLINK: | |
813 | led_on = 0x30 | (0 << 7); | |
814 | led_per = 0x08 | (1 << 7); | |
815 | break; | |
816 | default: | |
65fc50e5 | 817 | printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", |
72cd7995 | 818 | DRIVER_NAME); |
5c085d36 | 819 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
820 | return -EINVAL; |
821 | } | |
822 | ||
b5067f8f | 823 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
824 | TPS_LED1_ON + offs, led_on); |
825 | ||
826 | if (status != 0) { | |
827 | printk(KERN_ERR "%s: Failed to write led%i_on register\n", | |
828 | DRIVER_NAME, led); | |
5c085d36 | 829 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
830 | return status; |
831 | } | |
832 | ||
65fc50e5 | 833 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
b5067f8f | 834 | i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); |
72cd7995 | 835 | |
b5067f8f | 836 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
837 | TPS_LED1_PER + offs, led_per); |
838 | ||
839 | if (status != 0) { | |
840 | printk(KERN_ERR "%s: Failed to write led%i_per register\n", | |
841 | DRIVER_NAME, led); | |
5c085d36 | 842 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
843 | return status; |
844 | } | |
845 | ||
65fc50e5 | 846 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
b5067f8f | 847 | i2c_smbus_read_byte_data(the_tps->client, |
65fc50e5 | 848 | TPS_LED1_PER + offs)); |
72cd7995 | 849 | |
5c085d36 | 850 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
851 | |
852 | return status; | |
853 | } | |
854 | EXPORT_SYMBOL(tps65010_set_led); | |
855 | ||
856 | /*-------------------------------------------------------------------------*/ | |
857 | /* tps65010_set_vib parameter: | |
858 | * value: ON or OFF | |
859 | */ | |
860 | int tps65010_set_vib(unsigned value) | |
861 | { | |
862 | int status; | |
863 | unsigned vdcdc2; | |
864 | ||
865 | if (!the_tps) | |
866 | return -ENODEV; | |
867 | ||
5c085d36 | 868 | mutex_lock(&the_tps->lock); |
72cd7995 | 869 | |
b5067f8f | 870 | vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); |
72cd7995 DB |
871 | vdcdc2 &= ~(1 << 1); |
872 | if (value) | |
873 | vdcdc2 |= (1 << 1); | |
b5067f8f | 874 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
875 | TPS_VDCDC2, vdcdc2); |
876 | ||
877 | pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); | |
878 | ||
5c085d36 | 879 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
880 | return status; |
881 | } | |
882 | EXPORT_SYMBOL(tps65010_set_vib); | |
883 | ||
884 | /*-------------------------------------------------------------------------*/ | |
885 | /* tps65010_set_low_pwr parameter: | |
886 | * mode: ON or OFF | |
887 | */ | |
888 | int tps65010_set_low_pwr(unsigned mode) | |
889 | { | |
890 | int status; | |
891 | unsigned vdcdc1; | |
892 | ||
893 | if (!the_tps) | |
894 | return -ENODEV; | |
895 | ||
5c085d36 | 896 | mutex_lock(&the_tps->lock); |
72cd7995 DB |
897 | |
898 | pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, | |
899 | mode ? "enable" : "disable", | |
b5067f8f | 900 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
72cd7995 | 901 | |
b5067f8f | 902 | vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); |
72cd7995 DB |
903 | |
904 | switch (mode) { | |
905 | case OFF: | |
906 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
907 | break; | |
908 | /* case ON: */ | |
909 | default: | |
910 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
911 | break; | |
912 | } | |
913 | ||
b5067f8f | 914 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
915 | TPS_VDCDC1, vdcdc1); |
916 | ||
917 | if (status != 0) | |
918 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
65fc50e5 | 919 | DRIVER_NAME); |
72cd7995 DB |
920 | else |
921 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
b5067f8f | 922 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
72cd7995 | 923 | |
5c085d36 | 924 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
925 | |
926 | return status; | |
927 | } | |
928 | EXPORT_SYMBOL(tps65010_set_low_pwr); | |
929 | ||
930 | /*-------------------------------------------------------------------------*/ | |
931 | /* tps65010_config_vregs1 parameter: | |
932 | * value to be written to VREGS1 register | |
933 | * Note: The complete register is written, set all bits you need | |
934 | */ | |
935 | int tps65010_config_vregs1(unsigned value) | |
936 | { | |
937 | int status; | |
938 | ||
939 | if (!the_tps) | |
940 | return -ENODEV; | |
941 | ||
5c085d36 | 942 | mutex_lock(&the_tps->lock); |
72cd7995 DB |
943 | |
944 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
b5067f8f | 945 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
72cd7995 | 946 | |
b5067f8f | 947 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
948 | TPS_VREGS1, value); |
949 | ||
950 | if (status != 0) | |
951 | printk(KERN_ERR "%s: Failed to write vregs1 register\n", | |
65fc50e5 | 952 | DRIVER_NAME); |
72cd7995 DB |
953 | else |
954 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, | |
b5067f8f | 955 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
72cd7995 | 956 | |
5c085d36 | 957 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
958 | |
959 | return status; | |
960 | } | |
961 | EXPORT_SYMBOL(tps65010_config_vregs1); | |
962 | ||
963 | /*-------------------------------------------------------------------------*/ | |
964 | /* tps65013_set_low_pwr parameter: | |
965 | * mode: ON or OFF | |
966 | */ | |
967 | ||
968 | /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not | |
969 | required if power supply is through a battery */ | |
970 | ||
971 | int tps65013_set_low_pwr(unsigned mode) | |
972 | { | |
973 | int status; | |
974 | unsigned vdcdc1, chgconfig; | |
975 | ||
976 | if (!the_tps || the_tps->por) | |
977 | return -ENODEV; | |
978 | ||
5c085d36 | 979 | mutex_lock(&the_tps->lock); |
72cd7995 DB |
980 | |
981 | pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", | |
982 | DRIVER_NAME, | |
983 | mode ? "enable" : "disable", | |
b5067f8f DB |
984 | i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), |
985 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); | |
72cd7995 | 986 | |
b5067f8f DB |
987 | chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
988 | vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); | |
72cd7995 DB |
989 | |
990 | switch (mode) { | |
991 | case OFF: | |
992 | chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ | |
993 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ | |
994 | break; | |
995 | /* case ON: */ | |
996 | default: | |
997 | chgconfig |= TPS65013_AUA; /* enable AUA bit */ | |
998 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ | |
999 | break; | |
1000 | } | |
1001 | ||
b5067f8f | 1002 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
1003 | TPS_CHGCONFIG, chgconfig); |
1004 | if (status != 0) { | |
1005 | printk(KERN_ERR "%s: Failed to write chconfig register\n", | |
1006 | DRIVER_NAME); | |
5c085d36 | 1007 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
1008 | return status; |
1009 | } | |
1010 | ||
b5067f8f | 1011 | chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
72cd7995 DB |
1012 | the_tps->chgconf = chgconfig; |
1013 | show_chgconfig(0, "chgconf", chgconfig); | |
1014 | ||
b5067f8f | 1015 | status = i2c_smbus_write_byte_data(the_tps->client, |
72cd7995 DB |
1016 | TPS_VDCDC1, vdcdc1); |
1017 | ||
1018 | if (status != 0) | |
1019 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", | |
1020 | DRIVER_NAME); | |
1021 | else | |
1022 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, | |
b5067f8f | 1023 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
72cd7995 | 1024 | |
5c085d36 | 1025 | mutex_unlock(&the_tps->lock); |
72cd7995 DB |
1026 | |
1027 | return status; | |
1028 | } | |
1029 | EXPORT_SYMBOL(tps65013_set_low_pwr); | |
1030 | ||
1031 | /*-------------------------------------------------------------------------*/ | |
1032 | ||
1033 | static int __init tps_init(void) | |
1034 | { | |
1035 | u32 tries = 3; | |
1036 | int status = -ENODEV; | |
1037 | ||
1038 | printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); | |
1039 | ||
1040 | /* some boards have startup glitches */ | |
1041 | while (tries--) { | |
1042 | status = i2c_add_driver(&tps65010_driver); | |
1043 | if (the_tps) | |
1044 | break; | |
1045 | i2c_del_driver(&tps65010_driver); | |
1046 | if (!tries) { | |
1047 | printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); | |
1048 | return -ENODEV; | |
1049 | } | |
1050 | pr_debug("%s: re-probe ...\n", DRIVER_NAME); | |
1051 | msleep(10); | |
1052 | } | |
1053 | ||
72cd7995 DB |
1054 | return status; |
1055 | } | |
1056 | /* NOTE: this MUST be initialized before the other parts of the system | |
1057 | * that rely on it ... but after the i2c bus on which this relies. | |
1058 | * That is, much earlier than on PC-type systems, which don't often use | |
1059 | * I2C as a core system bus. | |
1060 | */ | |
1061 | subsys_initcall(tps_init); | |
1062 | ||
1063 | static void __exit tps_exit(void) | |
1064 | { | |
1065 | i2c_del_driver(&tps65010_driver); | |
1066 | } | |
1067 | module_exit(tps_exit); | |
1068 |