1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2009-2010 Pengutronix
4 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
6 * loosely based on an earlier driver that has
7 * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
10 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include <linux/platform_device.h>
14 #include <linux/mfd/core.h>
18 #define MC13XXX_IRQSTAT0 0
19 #define MC13XXX_IRQMASK0 1
20 #define MC13XXX_IRQSTAT1 3
21 #define MC13XXX_IRQMASK1 4
23 #define MC13XXX_REVISION 7
24 #define MC13XXX_REVISION_REVMETAL (0x07 << 0)
25 #define MC13XXX_REVISION_REVFULL (0x03 << 3)
26 #define MC13XXX_REVISION_ICID (0x07 << 6)
27 #define MC13XXX_REVISION_FIN (0x03 << 9)
28 #define MC13XXX_REVISION_FAB (0x03 << 11)
29 #define MC13XXX_REVISION_ICIDCODE (0x3f << 13)
31 #define MC34708_REVISION_REVMETAL (0x07 << 0)
32 #define MC34708_REVISION_REVFULL (0x07 << 3)
33 #define MC34708_REVISION_FIN (0x07 << 6)
34 #define MC34708_REVISION_FAB (0x07 << 9)
36 #define MC13XXX_PWRCTRL 15
37 #define MC13XXX_PWRCTRL_WDIRESET (1 << 12)
39 #define MC13XXX_ADC1 44
40 #define MC13XXX_ADC1_ADEN (1 << 0)
41 #define MC13XXX_ADC1_RAND (1 << 1)
42 #define MC13XXX_ADC1_ADSEL (1 << 3)
43 #define MC13XXX_ADC1_ASC (1 << 20)
44 #define MC13XXX_ADC1_ADTRIGIGN (1 << 21)
46 #define MC13XXX_ADC2 45
48 void mc13xxx_lock(struct mc13xxx *mc13xxx)
50 if (!mutex_trylock(&mc13xxx->lock)) {
51 dev_dbg(mc13xxx->dev, "wait for %s from %ps\n",
52 __func__, __builtin_return_address(0));
54 mutex_lock(&mc13xxx->lock);
56 dev_dbg(mc13xxx->dev, "%s from %ps\n",
57 __func__, __builtin_return_address(0));
59 EXPORT_SYMBOL(mc13xxx_lock);
61 void mc13xxx_unlock(struct mc13xxx *mc13xxx)
63 dev_dbg(mc13xxx->dev, "%s from %ps\n",
64 __func__, __builtin_return_address(0));
65 mutex_unlock(&mc13xxx->lock);
67 EXPORT_SYMBOL(mc13xxx_unlock);
69 int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
73 ret = regmap_read(mc13xxx->regmap, offset, val);
74 dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
78 EXPORT_SYMBOL(mc13xxx_reg_read);
80 int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
82 dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
87 return regmap_write(mc13xxx->regmap, offset, val);
89 EXPORT_SYMBOL(mc13xxx_reg_write);
91 int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
95 dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
98 return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
100 EXPORT_SYMBOL(mc13xxx_reg_rmw);
102 int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
104 int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
106 disable_irq_nosync(virq);
110 EXPORT_SYMBOL(mc13xxx_irq_mask);
112 int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
114 int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
120 EXPORT_SYMBOL(mc13xxx_irq_unmask);
122 int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
123 int *enabled, int *pending)
126 unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
127 unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
128 u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
130 if (irq < 0 || irq >= ARRAY_SIZE(mc13xxx->irqs))
136 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
140 *enabled = mask & irqbit;
146 ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
150 *pending = stat & irqbit;
155 EXPORT_SYMBOL(mc13xxx_irq_status);
157 int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
158 irq_handler_t handler, const char *name, void *dev)
160 int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
162 return devm_request_threaded_irq(mc13xxx->dev, virq, NULL, handler,
163 IRQF_ONESHOT, name, dev);
165 EXPORT_SYMBOL(mc13xxx_irq_request);
167 int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
169 int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
171 devm_free_irq(mc13xxx->dev, virq, dev);
175 EXPORT_SYMBOL(mc13xxx_irq_free);
177 #define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
178 static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
180 dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
181 "fin: %d, fab: %d, icid: %d/%d\n",
182 mc13xxx->variant->name,
183 maskval(revision, MC13XXX_REVISION_REVFULL),
184 maskval(revision, MC13XXX_REVISION_REVMETAL),
185 maskval(revision, MC13XXX_REVISION_FIN),
186 maskval(revision, MC13XXX_REVISION_FAB),
187 maskval(revision, MC13XXX_REVISION_ICID),
188 maskval(revision, MC13XXX_REVISION_ICIDCODE));
191 static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
193 dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
194 mc13xxx->variant->name,
195 maskval(revision, MC34708_REVISION_REVFULL),
196 maskval(revision, MC34708_REVISION_REVMETAL),
197 maskval(revision, MC34708_REVISION_FIN),
198 maskval(revision, MC34708_REVISION_FAB));
201 /* These are only exported for mc13xxx-i2c and mc13xxx-spi */
202 struct mc13xxx_variant mc13xxx_variant_mc13783 = {
204 .print_revision = mc13xxx_print_revision,
206 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
208 struct mc13xxx_variant mc13xxx_variant_mc13892 = {
210 .print_revision = mc13xxx_print_revision,
212 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
214 struct mc13xxx_variant mc13xxx_variant_mc34708 = {
216 .print_revision = mc34708_print_revision,
218 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
220 static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
222 return mc13xxx->variant->name;
225 int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
227 return mc13xxx->flags;
229 EXPORT_SYMBOL(mc13xxx_get_flags);
231 #define MC13XXX_ADC1_CHAN0_SHIFT 5
232 #define MC13XXX_ADC1_CHAN1_SHIFT 8
233 #define MC13783_ADC1_ATO_SHIFT 11
234 #define MC13783_ADC1_ATOX (1 << 19)
236 struct mc13xxx_adcdone_data {
237 struct mc13xxx *mc13xxx;
238 struct completion done;
241 static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
243 struct mc13xxx_adcdone_data *adcdone_data = data;
245 complete_all(&adcdone_data->done);
250 #define MC13XXX_ADC_WORKING (1 << 0)
252 int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
253 unsigned int channel, u8 ato, bool atox,
254 unsigned int *sample)
256 u32 adc0, adc1, old_adc0;
258 struct mc13xxx_adcdone_data adcdone_data = {
261 init_completion(&adcdone_data.done);
263 dev_dbg(mc13xxx->dev, "%s\n", __func__);
265 mc13xxx_lock(mc13xxx);
267 if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
272 mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
274 ret = mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
278 adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2 |
279 MC13XXX_ADC0_CHRGRAWDIV;
280 adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;
283 * Channels mapped through ADIN7:
284 * 7 - General purpose ADIN7
286 * 17 - Die temperature
288 if (channel > 7 && channel < 16) {
289 adc1 |= MC13XXX_ADC1_ADSEL;
290 } else if (channel == 16) {
291 adc0 |= MC13XXX_ADC0_ADIN7SEL_UID;
293 } else if (channel == 17) {
294 adc0 |= MC13XXX_ADC0_ADIN7SEL_DIE;
299 case MC13XXX_ADC_MODE_TS:
300 adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
302 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
305 case MC13XXX_ADC_MODE_SINGLE_CHAN:
306 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
307 adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
308 adc1 |= MC13XXX_ADC1_RAND;
311 case MC13XXX_ADC_MODE_MULT_CHAN:
312 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
313 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
317 mc13xxx_unlock(mc13xxx);
321 adc1 |= ato << MC13783_ADC1_ATO_SHIFT;
323 adc1 |= MC13783_ADC1_ATOX;
325 dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__);
326 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
327 mc13xxx_handler_adcdone, __func__, &adcdone_data);
331 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
332 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
334 mc13xxx_unlock(mc13xxx);
336 ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
341 mc13xxx_lock(mc13xxx);
343 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);
346 for (i = 0; i < 4; ++i) {
347 ret = mc13xxx_reg_read(mc13xxx,
348 MC13XXX_ADC2, &sample[i]);
353 if (mode == MC13XXX_ADC_MODE_TS)
355 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
357 mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
359 mc13xxx_unlock(mc13xxx);
363 EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
365 static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
366 const char *format, void *pdata, size_t pdata_size)
369 const char *name = mc13xxx_get_chipname(mc13xxx);
371 struct mfd_cell cell = {
372 .platform_data = pdata,
373 .pdata_size = pdata_size,
376 /* there is no asnprintf in the kernel :-( */
377 if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
380 cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
384 return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0,
385 regmap_irq_get_domain(mc13xxx->irq_data));
388 static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
390 return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
394 static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
396 struct device_node *np = mc13xxx->dev->of_node;
401 if (of_property_read_bool(np, "fsl,mc13xxx-uses-adc"))
402 mc13xxx->flags |= MC13XXX_USE_ADC;
404 if (of_property_read_bool(np, "fsl,mc13xxx-uses-codec"))
405 mc13xxx->flags |= MC13XXX_USE_CODEC;
407 if (of_property_read_bool(np, "fsl,mc13xxx-uses-rtc"))
408 mc13xxx->flags |= MC13XXX_USE_RTC;
410 if (of_property_read_bool(np, "fsl,mc13xxx-uses-touch"))
411 mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
416 static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
422 int mc13xxx_common_init(struct device *dev)
424 struct mc13xxx_platform_data *pdata = dev_get_platdata(dev);
425 struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
431 ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
435 mc13xxx->variant->print_revision(mc13xxx, revision);
437 ret = mc13xxx_reg_rmw(mc13xxx, MC13XXX_PWRCTRL,
438 MC13XXX_PWRCTRL_WDIRESET, MC13XXX_PWRCTRL_WDIRESET);
442 for (i = 0; i < ARRAY_SIZE(mc13xxx->irqs); i++) {
443 mc13xxx->irqs[i].reg_offset = i / MC13XXX_IRQ_PER_REG;
444 mc13xxx->irqs[i].mask = BIT(i % MC13XXX_IRQ_PER_REG);
447 mc13xxx->irq_chip.name = dev_name(dev);
448 mc13xxx->irq_chip.status_base = MC13XXX_IRQSTAT0;
449 mc13xxx->irq_chip.mask_base = MC13XXX_IRQMASK0;
450 mc13xxx->irq_chip.ack_base = MC13XXX_IRQSTAT0;
451 mc13xxx->irq_chip.irq_reg_stride = MC13XXX_IRQSTAT1 - MC13XXX_IRQSTAT0;
452 mc13xxx->irq_chip.init_ack_masked = true;
453 mc13xxx->irq_chip.use_ack = true;
454 mc13xxx->irq_chip.num_regs = MC13XXX_IRQ_REG_CNT;
455 mc13xxx->irq_chip.irqs = mc13xxx->irqs;
456 mc13xxx->irq_chip.num_irqs = ARRAY_SIZE(mc13xxx->irqs);
458 ret = regmap_add_irq_chip(mc13xxx->regmap, mc13xxx->irq, IRQF_ONESHOT,
459 0, &mc13xxx->irq_chip, &mc13xxx->irq_data);
463 mutex_init(&mc13xxx->lock);
465 if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
466 mc13xxx->flags = pdata->flags;
469 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
470 &pdata->regulators, sizeof(pdata->regulators));
471 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
472 pdata->leds, sizeof(*pdata->leds));
473 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
474 pdata->buttons, sizeof(*pdata->buttons));
475 if (mc13xxx->flags & MC13XXX_USE_CODEC)
476 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
477 pdata->codec, sizeof(*pdata->codec));
478 if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
479 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
480 &pdata->touch, sizeof(pdata->touch));
482 mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
483 mc13xxx_add_subdevice(mc13xxx, "%s-led");
484 mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
485 if (mc13xxx->flags & MC13XXX_USE_CODEC)
486 mc13xxx_add_subdevice(mc13xxx, "%s-codec");
487 if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
488 mc13xxx_add_subdevice(mc13xxx, "%s-ts");
491 if (mc13xxx->flags & MC13XXX_USE_ADC)
492 mc13xxx_add_subdevice(mc13xxx, "%s-adc");
494 if (mc13xxx->flags & MC13XXX_USE_RTC)
495 mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
499 EXPORT_SYMBOL_GPL(mc13xxx_common_init);
501 int mc13xxx_common_exit(struct device *dev)
503 struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
505 mfd_remove_devices(dev);
506 regmap_del_irq_chip(mc13xxx->irq, mc13xxx->irq_data);
507 mutex_destroy(&mc13xxx->lock);
511 EXPORT_SYMBOL_GPL(mc13xxx_common_exit);
513 MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
514 MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
515 MODULE_LICENSE("GPL v2");