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[linux-2.6-block.git] / drivers / mfd / mc13xxx-core.c
CommitLineData
8e005935
UKK		 1/*
2 * Copyright 2009-2010 Pengutronix
3 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
4 *
5 * loosely based on an earlier driver that has
6 * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
7 *
8 * This program is free software; you can redistribute it and/or modify it under
9 * the terms of the GNU General Public License version 2 as published by the
10 * Free Software Foundation.
11 */
8e005935
UKK		 12
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/mutex.h>
17#include <linux/interrupt.h>
8e005935
UKK		 18#include <linux/mfd/core.h>
19#include <linux/mfd/mc13xxx.h>
876989d5
SG		 20#include <linux/of.h>
21#include <linux/of_device.h>
22#include <linux/of_gpio.h>
8e005935 23
a0c7c1d4 24#include "mc13xxx.h"
8e005935 25
8e005935
UKK		 26#define MC13XXX_IRQSTAT0 0
27#define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0)
28#define MC13XXX_IRQSTAT0_ADCBISDONEI (1 << 1)
29#define MC13XXX_IRQSTAT0_TSI (1 << 2)
30#define MC13783_IRQSTAT0_WHIGHI (1 << 3)
31#define MC13783_IRQSTAT0_WLOWI (1 << 4)
32#define MC13XXX_IRQSTAT0_CHGDETI (1 << 6)
33#define MC13783_IRQSTAT0_CHGOVI (1 << 7)
34#define MC13XXX_IRQSTAT0_CHGREVI (1 << 8)
35#define MC13XXX_IRQSTAT0_CHGSHORTI (1 << 9)
36#define MC13XXX_IRQSTAT0_CCCVI (1 << 10)
37#define MC13XXX_IRQSTAT0_CHGCURRI (1 << 11)
38#define MC13XXX_IRQSTAT0_BPONI (1 << 12)
39#define MC13XXX_IRQSTAT0_LOBATLI (1 << 13)
40#define MC13XXX_IRQSTAT0_LOBATHI (1 << 14)
41#define MC13783_IRQSTAT0_UDPI (1 << 15)
42#define MC13783_IRQSTAT0_USBI (1 << 16)
43#define MC13783_IRQSTAT0_IDI (1 << 19)
44#define MC13783_IRQSTAT0_SE1I (1 << 21)
45#define MC13783_IRQSTAT0_CKDETI (1 << 22)
46#define MC13783_IRQSTAT0_UDMI (1 << 23)
47
48#define MC13XXX_IRQMASK0 1
49#define MC13XXX_IRQMASK0_ADCDONEM MC13XXX_IRQSTAT0_ADCDONEI
50#define MC13XXX_IRQMASK0_ADCBISDONEM MC13XXX_IRQSTAT0_ADCBISDONEI
51#define MC13XXX_IRQMASK0_TSM MC13XXX_IRQSTAT0_TSI
52#define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI
53#define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI
54#define MC13XXX_IRQMASK0_CHGDETM MC13XXX_IRQSTAT0_CHGDETI
55#define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI
56#define MC13XXX_IRQMASK0_CHGREVM MC13XXX_IRQSTAT0_CHGREVI
57#define MC13XXX_IRQMASK0_CHGSHORTM MC13XXX_IRQSTAT0_CHGSHORTI
58#define MC13XXX_IRQMASK0_CCCVM MC13XXX_IRQSTAT0_CCCVI
59#define MC13XXX_IRQMASK0_CHGCURRM MC13XXX_IRQSTAT0_CHGCURRI
60#define MC13XXX_IRQMASK0_BPONM MC13XXX_IRQSTAT0_BPONI
61#define MC13XXX_IRQMASK0_LOBATLM MC13XXX_IRQSTAT0_LOBATLI
62#define MC13XXX_IRQMASK0_LOBATHM MC13XXX_IRQSTAT0_LOBATHI
63#define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI
64#define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI
65#define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI
66#define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I
67#define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI
68#define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI
69
70#define MC13XXX_IRQSTAT1 3
71#define MC13XXX_IRQSTAT1_1HZI (1 << 0)
72#define MC13XXX_IRQSTAT1_TODAI (1 << 1)
73#define MC13783_IRQSTAT1_ONOFD1I (1 << 3)
74#define MC13783_IRQSTAT1_ONOFD2I (1 << 4)
75#define MC13783_IRQSTAT1_ONOFD3I (1 << 5)
76#define MC13XXX_IRQSTAT1_SYSRSTI (1 << 6)
77#define MC13XXX_IRQSTAT1_RTCRSTI (1 << 7)
78#define MC13XXX_IRQSTAT1_PCI (1 << 8)
79#define MC13XXX_IRQSTAT1_WARMI (1 << 9)
80#define MC13XXX_IRQSTAT1_MEMHLDI (1 << 10)
81#define MC13783_IRQSTAT1_PWRRDYI (1 << 11)
82#define MC13XXX_IRQSTAT1_THWARNLI (1 << 12)
83#define MC13XXX_IRQSTAT1_THWARNHI (1 << 13)
84#define MC13XXX_IRQSTAT1_CLKI (1 << 14)
85#define MC13783_IRQSTAT1_SEMAFI (1 << 15)
86#define MC13783_IRQSTAT1_MC2BI (1 << 17)
87#define MC13783_IRQSTAT1_HSDETI (1 << 18)
88#define MC13783_IRQSTAT1_HSLI (1 << 19)
89#define MC13783_IRQSTAT1_ALSPTHI (1 << 20)
90#define MC13783_IRQSTAT1_AHSSHORTI (1 << 21)
91
92#define MC13XXX_IRQMASK1 4
93#define MC13XXX_IRQMASK1_1HZM MC13XXX_IRQSTAT1_1HZI
94#define MC13XXX_IRQMASK1_TODAM MC13XXX_IRQSTAT1_TODAI
95#define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I
96#define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I
97#define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I
98#define MC13XXX_IRQMASK1_SYSRSTM MC13XXX_IRQSTAT1_SYSRSTI
99#define MC13XXX_IRQMASK1_RTCRSTM MC13XXX_IRQSTAT1_RTCRSTI
100#define MC13XXX_IRQMASK1_PCM MC13XXX_IRQSTAT1_PCI
101#define MC13XXX_IRQMASK1_WARMM MC13XXX_IRQSTAT1_WARMI
102#define MC13XXX_IRQMASK1_MEMHLDM MC13XXX_IRQSTAT1_MEMHLDI
103#define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI
104#define MC13XXX_IRQMASK1_THWARNLM MC13XXX_IRQSTAT1_THWARNLI
105#define MC13XXX_IRQMASK1_THWARNHM MC13XXX_IRQSTAT1_THWARNHI
106#define MC13XXX_IRQMASK1_CLKM MC13XXX_IRQSTAT1_CLKI
107#define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI
108#define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI
109#define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI
110#define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI
111#define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI
112#define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI
113
114#define MC13XXX_REVISION 7
115#define MC13XXX_REVISION_REVMETAL (0x07 << 0)
116#define MC13XXX_REVISION_REVFULL (0x03 << 3)
117#define MC13XXX_REVISION_ICID (0x07 << 6)
118#define MC13XXX_REVISION_FIN (0x03 << 9)
119#define MC13XXX_REVISION_FAB (0x03 << 11)
120#define MC13XXX_REVISION_ICIDCODE (0x3f << 13)
121
0312e024
UKK		 122#define MC34708_REVISION_REVMETAL (0x07 << 0)
123#define MC34708_REVISION_REVFULL (0x07 << 3)
124#define MC34708_REVISION_FIN (0x07 << 6)
125#define MC34708_REVISION_FAB (0x07 << 9)
126
fec316d6
UKK		 127#define MC13XXX_ADC1 44
128#define MC13XXX_ADC1_ADEN (1 << 0)
129#define MC13XXX_ADC1_RAND (1 << 1)
130#define MC13XXX_ADC1_ADSEL (1 << 3)
131#define MC13XXX_ADC1_ASC (1 << 20)
132#define MC13XXX_ADC1_ADTRIGIGN (1 << 21)
8e005935 133
fec316d6 134#define MC13XXX_ADC2 45
8e005935 135
8e005935
UKK		 136void mc13xxx_lock(struct mc13xxx *mc13xxx)
137{
138 if (!mutex_trylock(&mc13xxx->lock)) {
5006fe54 139 dev_dbg(mc13xxx->dev, "wait for %s from %pf\n",
8e005935
UKK		 140 __func__, __builtin_return_address(0));
141
142 mutex_lock(&mc13xxx->lock);
143 }
5006fe54 144 dev_dbg(mc13xxx->dev, "%s from %pf\n",
8e005935
UKK		 145 __func__, __builtin_return_address(0));
146}
147EXPORT_SYMBOL(mc13xxx_lock);
148
149void mc13xxx_unlock(struct mc13xxx *mc13xxx)
150{
5006fe54 151 dev_dbg(mc13xxx->dev, "%s from %pf\n",
8e005935
UKK		 152 __func__, __builtin_return_address(0));
153 mutex_unlock(&mc13xxx->lock);
154}
155EXPORT_SYMBOL(mc13xxx_unlock);
156
8e005935
UKK		 157int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
158{
8e005935
UKK		 159 int ret;
160
91b5e741 161 ret = regmap_read(mc13xxx->regmap, offset, val);
5006fe54 162 dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
8e005935 163
5006fe54 164 return ret;
8e005935
UKK		 165}
166EXPORT_SYMBOL(mc13xxx_reg_read);
167
168int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
169{
5006fe54 170 dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
8e005935 171
328fe79c 172 if (val >= BIT(24))
8e005935
UKK		 173 return -EINVAL;
174
91b5e741 175 return regmap_write(mc13xxx->regmap, offset, val);
8e005935
UKK		 176}
177EXPORT_SYMBOL(mc13xxx_reg_write);
178
179int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
180 u32 mask, u32 val)
181{
8e005935 182 BUG_ON(val & ~mask);
91b5e741
MR		 183 dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
184 offset, val, mask);
8e005935 185
91b5e741 186 return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
8e005935
UKK		 187}
188EXPORT_SYMBOL(mc13xxx_reg_rmw);
189
190int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
191{
192 int ret;
193 unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
194 u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
195 u32 mask;
196
197 if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
198 return -EINVAL;
199
200 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
201 if (ret)
202 return ret;
203
204 if (mask & irqbit)
205 /* already masked */
206 return 0;
207
208 return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit);
209}
210EXPORT_SYMBOL(mc13xxx_irq_mask);
211
212int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
213{
214 int ret;
215 unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
216 u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
217 u32 mask;
218
219 if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
220 return -EINVAL;
221
222 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
223 if (ret)
224 return ret;
225
226 if (!(mask & irqbit))
227 /* already unmasked */
228 return 0;
229
230 return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit);
231}
232EXPORT_SYMBOL(mc13xxx_irq_unmask);
233
234int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
235 int *enabled, int *pending)
236{
237 int ret;
238 unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
239 unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
240 u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
241
242 if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
243 return -EINVAL;
244
245 if (enabled) {
246 u32 mask;
247
248 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
249 if (ret)
250 return ret;
251
252 *enabled = mask & irqbit;
253 }
254
255 if (pending) {
256 u32 stat;
257
258 ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
259 if (ret)
260 return ret;
261
262 *pending = stat & irqbit;
263 }
264
265 return 0;
266}
267EXPORT_SYMBOL(mc13xxx_irq_status);
268
269int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq)
270{
271 unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
272 unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
273
274 BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ);
275
276 return mc13xxx_reg_write(mc13xxx, offstat, val);
277}
278EXPORT_SYMBOL(mc13xxx_irq_ack);
279
280int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq,
281 irq_handler_t handler, const char *name, void *dev)
282{
283 BUG_ON(!mutex_is_locked(&mc13xxx->lock));
284 BUG_ON(!handler);
285
286 if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
287 return -EINVAL;
288
289 if (mc13xxx->irqhandler[irq])
290 return -EBUSY;
291
292 mc13xxx->irqhandler[irq] = handler;
293 mc13xxx->irqdata[irq] = dev;
294
295 return 0;
296}
297EXPORT_SYMBOL(mc13xxx_irq_request_nounmask);
298
299int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
300 irq_handler_t handler, const char *name, void *dev)
301{
302 int ret;
303
304 ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev);
305 if (ret)
306 return ret;
307
308 ret = mc13xxx_irq_unmask(mc13xxx, irq);
309 if (ret) {
310 mc13xxx->irqhandler[irq] = NULL;
311 mc13xxx->irqdata[irq] = NULL;
312 return ret;
313 }
314
315 return 0;
316}
317EXPORT_SYMBOL(mc13xxx_irq_request);
318
319int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
320{
321 int ret;
322 BUG_ON(!mutex_is_locked(&mc13xxx->lock));
323
324 if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] ||
325 mc13xxx->irqdata[irq] != dev)
326 return -EINVAL;
327
328 ret = mc13xxx_irq_mask(mc13xxx, irq);
329 if (ret)
330 return ret;
331
332 mc13xxx->irqhandler[irq] = NULL;
333 mc13xxx->irqdata[irq] = NULL;
334
335 return 0;
336}
337EXPORT_SYMBOL(mc13xxx_irq_free);
338
339static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq)
340{
341 return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]);
342}
343
344/*
345 * returns: number of handled irqs or negative error
346 * locking: holds mc13xxx->lock
347 */
348static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
349 unsigned int offstat, unsigned int offmask, int baseirq)
350{
351 u32 stat, mask;
352 int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
353 int num_handled = 0;
354
355 if (ret)
356 return ret;
357
358 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
359 if (ret)
360 return ret;
361
362 while (stat & ~mask) {
363 int irq = __ffs(stat & ~mask);
364
365 stat &= ~(1 << irq);
366
367 if (likely(mc13xxx->irqhandler[baseirq + irq])) {
368 irqreturn_t handled;
369
370 handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq);
371 if (handled == IRQ_HANDLED)
372 num_handled++;
373 } else {
5006fe54 374 dev_err(mc13xxx->dev,
8e005935
UKK		 375 "BUG: irq %u but no handler\n",
376 baseirq + irq);
377
378 mask |= 1 << irq;
379
380 ret = mc13xxx_reg_write(mc13xxx, offmask, mask);
381 }
382 }
383
384 return num_handled;
385}
386
387static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
388{
389 struct mc13xxx *mc13xxx = data;
390 irqreturn_t ret;
391 int handled = 0;
392
393 mc13xxx_lock(mc13xxx);
394
395 ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0,
396 MC13XXX_IRQMASK0, 0);
397 if (ret > 0)
398 handled = 1;
399
400 ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1,
401 MC13XXX_IRQMASK1, 24);
402 if (ret > 0)
403 handled = 1;
404
405 mc13xxx_unlock(mc13xxx);
406
407 return IRQ_RETVAL(handled);
408}
409
8e005935 410#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
cd0f34b0 411static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
8e005935 412{
cd0f34b0
UKK		 413 dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
414 "fin: %d, fab: %d, icid: %d/%d\n",
415 mc13xxx->variant->name,
416 maskval(revision, MC13XXX_REVISION_REVFULL),
417 maskval(revision, MC13XXX_REVISION_REVMETAL),
418 maskval(revision, MC13XXX_REVISION_FIN),
419 maskval(revision, MC13XXX_REVISION_FAB),
420 maskval(revision, MC13XXX_REVISION_ICID),
421 maskval(revision, MC13XXX_REVISION_ICIDCODE));
422}
8e005935 423
0312e024
UKK		 424static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
425{
426 dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
427 mc13xxx->variant->name,
428 maskval(revision, MC34708_REVISION_REVFULL),
429 maskval(revision, MC34708_REVISION_REVMETAL),
430 maskval(revision, MC34708_REVISION_FIN),
431 maskval(revision, MC34708_REVISION_FAB));
432}
433
cd0f34b0
UKK		 434/* These are only exported for mc13xxx-i2c and mc13xxx-spi */
435struct mc13xxx_variant mc13xxx_variant_mc13783 = {
436 .name = "mc13783",
437 .print_revision = mc13xxx_print_revision,
438};
439EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
8e005935 440
cd0f34b0
UKK		 441struct mc13xxx_variant mc13xxx_variant_mc13892 = {
442 .name = "mc13892",
443 .print_revision = mc13xxx_print_revision,
444};
445EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
8e005935 446
0312e024
UKK		 447struct mc13xxx_variant mc13xxx_variant_mc34708 = {
448 .name = "mc34708",
449 .print_revision = mc34708_print_revision,
450};
451EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
452
8e005935
UKK		 453static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
454{
cd0f34b0 455 return mc13xxx->variant->name;
8e005935
UKK		 456}
457
8e005935
UKK		 458int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
459{
876989d5 460 return mc13xxx->flags;
8e005935
UKK		 461}
462EXPORT_SYMBOL(mc13xxx_get_flags);
463
fec316d6
UKK		 464#define MC13XXX_ADC1_CHAN0_SHIFT 5
465#define MC13XXX_ADC1_CHAN1_SHIFT 8
1039d762
MT		 466#define MC13783_ADC1_ATO_SHIFT 11
467#define MC13783_ADC1_ATOX (1 << 19)
8e005935
UKK		 468
469struct mc13xxx_adcdone_data {
470 struct mc13xxx *mc13xxx;
471 struct completion done;
472};
473
fec316d6 474static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
8e005935
UKK		 475{
476 struct mc13xxx_adcdone_data *adcdone_data = data;
477
478 mc13xxx_irq_ack(adcdone_data->mc13xxx, irq);
479
480 complete_all(&adcdone_data->done);
481
482 return IRQ_HANDLED;
483}
484
fec316d6 485#define MC13XXX_ADC_WORKING (1 << 0)
8e005935 486
fec316d6 487int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
1039d762
MT		 488 unsigned int channel, u8 ato, bool atox,
489 unsigned int *sample)
8e005935 490{
8e005935
UKK		 491 u32 adc0, adc1, old_adc0;
492 int i, ret;
493 struct mc13xxx_adcdone_data adcdone_data = {
494 .mc13xxx = mc13xxx,
495 };
496 init_completion(&adcdone_data.done);
497
5006fe54 498 dev_dbg(mc13xxx->dev, "%s\n", __func__);
8e005935
UKK		 499
500 mc13xxx_lock(mc13xxx);
501
fec316d6 502 if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
8e005935
UKK		 503 ret = -EBUSY;
504 goto out;
505 }
506
fec316d6 507 mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
8e005935 508
fec316d6 509 mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
8e005935 510
fec316d6
UKK		 511 adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2;
512 adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;
8e005935
UKK		 513
514 if (channel > 7)
fec316d6 515 adc1 |= MC13XXX_ADC1_ADSEL;
8e005935
UKK		 516
517 switch (mode) {
fec316d6
UKK		 518 case MC13XXX_ADC_MODE_TS:
519 adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
520 MC13XXX_ADC0_TSMOD1;
521 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
8e005935
UKK		 522 break;
523
fec316d6 524 case MC13XXX_ADC_MODE_SINGLE_CHAN:
2161891a 525 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
fec316d6
UKK		 526 adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
527 adc1 |= MC13XXX_ADC1_RAND;
8e005935
UKK		 528 break;
529
fec316d6 530 case MC13XXX_ADC_MODE_MULT_CHAN:
2161891a 531 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
fec316d6 532 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
8e005935
UKK		 533 break;
534
535 default:
fec316d6 536 mc13xxx_unlock(mc13xxx);
8e005935
UKK		 537 return -EINVAL;
538 }
539
1039d762
MT		 540 adc1 |= ato << MC13783_ADC1_ATO_SHIFT;
541 if (atox)
542 adc1 |= MC13783_ADC1_ATOX;
5006fe54
MR		 543
544 dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__);
fec316d6
UKK		 545 mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
546 mc13xxx_handler_adcdone, __func__, &adcdone_data);
547 mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE);
8e005935 548
fec316d6
UKK		 549 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
550 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
8e005935
UKK		 551
552 mc13xxx_unlock(mc13xxx);
553
554 ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
555
556 if (!ret)
557 ret = -ETIMEDOUT;
558
559 mc13xxx_lock(mc13xxx);
560
fec316d6 561 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);
8e005935
UKK		 562
563 if (ret > 0)
564 for (i = 0; i < 4; ++i) {
565 ret = mc13xxx_reg_read(mc13xxx,
fec316d6 566 MC13XXX_ADC2, &sample[i]);
8e005935
UKK		 567 if (ret)
568 break;
569 }
570
fec316d6 571 if (mode == MC13XXX_ADC_MODE_TS)
8e005935 572 /* restore TSMOD */
fec316d6 573 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
8e005935 574
fec316d6 575 mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
8e005935
UKK		 576out:
577 mc13xxx_unlock(mc13xxx);
578
579 return ret;
580}
fec316d6 581EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
8e005935
UKK		 582
583static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
c8a03c96 584 const char *format, void *pdata, size_t pdata_size)
8e005935
UKK		 585{
586 char buf[30];
587 const char *name = mc13xxx_get_chipname(mc13xxx);
588
589 struct mfd_cell cell = {
c8a03c96
SO		 590 .platform_data = pdata,
591 .pdata_size = pdata_size,
8e005935
UKK		 592 };
593
594 /* there is no asnprintf in the kernel :-( */
595 if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
596 return -E2BIG;
597
598 cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
599 if (!cell.name)
600 return -ENOMEM;
601
55692af5 602 return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0, NULL);
8e005935
UKK		 603}
604
605static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
606{
c8a03c96 607 return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
8e005935
UKK		 608}
609
876989d5
SG		 610#ifdef CONFIG_OF
611static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
612{
91b5e741 613 struct device_node *np = mc13xxx->dev->of_node;
876989d5
SG		 614
615 if (!np)
616 return -ENODEV;
617
618 if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL))
619 mc13xxx->flags |= MC13XXX_USE_ADC;
620
621 if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL))
622 mc13xxx->flags |= MC13XXX_USE_CODEC;
623
624 if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL))
625 mc13xxx->flags |= MC13XXX_USE_RTC;
626
627 if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL))
628 mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
629
630 return 0;
631}
632#else
633static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
634{
635 return -ENODEV;
636}
637#endif
638
db9ef449 639int mc13xxx_common_init(struct device *dev)
8e005935 640{
db9ef449
AS		 641 struct mc13xxx_platform_data *pdata = dev_get_platdata(dev);
642 struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
8e005935 643 int ret;
cd0f34b0 644 u32 revision;
8e005935 645
db9ef449 646 mc13xxx->dev = dev;
8e005935 647
cd0f34b0 648 ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
5006fe54 649 if (ret)
db9ef449 650 return ret;
8e005935 651
cd0f34b0
UKK		 652 mc13xxx->variant->print_revision(mc13xxx, revision);
653
8e005935
UKK		 654 /* mask all irqs */
655 ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
656 if (ret)
db9ef449 657 return ret;
8e005935
UKK		 658
659 ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
660 if (ret)
db9ef449 661 return ret;
8e005935 662
48ca9a52
FE		 663 mutex_init(&mc13xxx->lock);
664
db9ef449 665 ret = request_threaded_irq(mc13xxx->irq, NULL, mc13xxx_irq_thread,
8e005935 666 IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
db9ef449 667 if (ret)
8e005935 668 return ret;
5006fe54 669
876989d5
SG		 670 if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
671 mc13xxx->flags = pdata->flags;
672
673 if (mc13xxx->flags & MC13XXX_USE_ADC)
8e005935
UKK		 674 mc13xxx_add_subdevice(mc13xxx, "%s-adc");
675
876989d5 676 if (mc13xxx->flags & MC13XXX_USE_RTC)
8e005935
UKK		 677 mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
678
876989d5
SG		 679 if (pdata) {
680 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
681 &pdata->regulators, sizeof(pdata->regulators));
c8a03c96
SO		 682 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
683 pdata->leds, sizeof(*pdata->leds));
30fc7ac3
PR		 684 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
685 pdata->buttons, sizeof(*pdata->buttons));
a2ff8459
AS		 686 if (mc13xxx->flags & MC13XXX_USE_CODEC)
687 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
688 pdata->codec, sizeof(*pdata->codec));
689 if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
690 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
691 &pdata->touch, sizeof(pdata->touch));
876989d5
SG		 692 } else {
693 mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
694 mc13xxx_add_subdevice(mc13xxx, "%s-led");
695 mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
a2ff8459
AS		 696 if (mc13xxx->flags & MC13XXX_USE_CODEC)
697 mc13xxx_add_subdevice(mc13xxx, "%s-codec");
698 if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
699 mc13xxx_add_subdevice(mc13xxx, "%s-ts");
876989d5 700 }
30fc7ac3 701
8e005935
UKK		 702 return 0;
703}
a0c7c1d4 704EXPORT_SYMBOL_GPL(mc13xxx_common_init);
8e005935 705
db9ef449 706int mc13xxx_common_exit(struct device *dev)
8e005935 707{
db9ef449
AS		 708 struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
709
5006fe54 710 free_irq(mc13xxx->irq, mc13xxx);
db9ef449
AS		 711 mfd_remove_devices(dev);
712 mutex_destroy(&mc13xxx->lock);
8e005935 713
db9ef449 714 return 0;
8e005935 715}
db9ef449 716EXPORT_SYMBOL_GPL(mc13xxx_common_exit);
8e005935
UKK		 717
718MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
719MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
720MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)