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1/*
2 * TI Palmas MFD Driver
3 *
4 * Copyright 2011-2012 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/slab.h>
19#include <linux/i2c.h>
20#include <linux/interrupt.h>
21#include <linux/irq.h>
22#include <linux/regmap.h>
23#include <linux/err.h>
24#include <linux/mfd/core.h>
25#include <linux/mfd/palmas.h>
26
27static const struct resource gpadc_resource[] = {
28 {
29 .name = "EOC_SW",
30 .start = PALMAS_GPADC_EOC_SW_IRQ,
31 .end = PALMAS_GPADC_EOC_SW_IRQ,
32 .flags = IORESOURCE_IRQ,
33 }
34};
35
36static const struct resource usb_resource[] = {
37 {
38 .name = "ID",
39 .start = PALMAS_ID_OTG_IRQ,
40 .end = PALMAS_ID_OTG_IRQ,
41 .flags = IORESOURCE_IRQ,
42 },
43 {
44 .name = "ID_WAKEUP",
45 .start = PALMAS_ID_IRQ,
46 .end = PALMAS_ID_IRQ,
47 .flags = IORESOURCE_IRQ,
48 },
49 {
50 .name = "VBUS",
51 .start = PALMAS_VBUS_OTG_IRQ,
52 .end = PALMAS_VBUS_OTG_IRQ,
53 .flags = IORESOURCE_IRQ,
54 },
55 {
56 .name = "VBUS_WAKEUP",
57 .start = PALMAS_VBUS_IRQ,
58 .end = PALMAS_VBUS_IRQ,
59 .flags = IORESOURCE_IRQ,
60 },
61};
62
63static const struct resource rtc_resource[] = {
64 {
65 .name = "RTC_ALARM",
66 .start = PALMAS_RTC_ALARM_IRQ,
67 .end = PALMAS_RTC_ALARM_IRQ,
68 .flags = IORESOURCE_IRQ,
69 },
70};
71
72static const struct resource pwron_resource[] = {
73 {
74 .name = "PWRON_BUTTON",
75 .start = PALMAS_PWRON_IRQ,
76 .end = PALMAS_PWRON_IRQ,
77 .flags = IORESOURCE_IRQ,
78 },
79};
80
81enum palmas_ids {
82 PALMAS_PMIC_ID,
83 PALMAS_GPIO_ID,
84 PALMAS_LEDS_ID,
85 PALMAS_WDT_ID,
86 PALMAS_RTC_ID,
87 PALMAS_PWRBUTTON_ID,
88 PALMAS_GPADC_ID,
89 PALMAS_RESOURCE_ID,
90 PALMAS_CLK_ID,
91 PALMAS_PWM_ID,
92 PALMAS_USB_ID,
93};
94
95static const struct mfd_cell palmas_children[] = {
96 {
97 .name = "palmas-pmic",
98 .id = PALMAS_PMIC_ID,
99 },
100 {
101 .name = "palmas-gpio",
102 .id = PALMAS_GPIO_ID,
103 },
104 {
105 .name = "palmas-leds",
106 .id = PALMAS_LEDS_ID,
107 },
108 {
109 .name = "palmas-wdt",
110 .id = PALMAS_WDT_ID,
111 },
112 {
113 .name = "palmas-rtc",
114 .num_resources = ARRAY_SIZE(rtc_resource),
115 .resources = rtc_resource,
116 .id = PALMAS_RTC_ID,
117 },
118 {
119 .name = "palmas-pwrbutton",
120 .num_resources = ARRAY_SIZE(pwron_resource),
121 .resources = pwron_resource,
122 .id = PALMAS_PWRBUTTON_ID,
123 },
124 {
125 .name = "palmas-gpadc",
126 .num_resources = ARRAY_SIZE(gpadc_resource),
127 .resources = gpadc_resource,
128 .id = PALMAS_GPADC_ID,
129 },
130 {
131 .name = "palmas-resource",
132 .id = PALMAS_RESOURCE_ID,
133 },
134 {
135 .name = "palmas-clk",
136 .id = PALMAS_CLK_ID,
137 },
138 {
139 .name = "palmas-pwm",
140 .id = PALMAS_PWM_ID,
141 },
142 {
143 .name = "palmas-usb",
144 .num_resources = ARRAY_SIZE(usb_resource),
145 .resources = usb_resource,
146 .id = PALMAS_USB_ID,
147 }
148};
149
150static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
151 {
152 .reg_bits = 8,
153 .val_bits = 8,
154 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
155 PALMAS_PRIMARY_SECONDARY_PAD3),
156 },
157 {
158 .reg_bits = 8,
159 .val_bits = 8,
160 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
161 PALMAS_GPADC_SMPS_VSEL_MONITORING),
162 },
163 {
164 .reg_bits = 8,
165 .val_bits = 8,
166 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
167 PALMAS_GPADC_TRIM16),
168 },
169};
170
171static const struct regmap_irq palmas_irqs[] = {
172 /* INT1 IRQs */
173 [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
174 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
175 },
176 [PALMAS_PWRON_IRQ] = {
177 .mask = PALMAS_INT1_STATUS_PWRON,
178 },
179 [PALMAS_LONG_PRESS_KEY_IRQ] = {
180 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
181 },
182 [PALMAS_RPWRON_IRQ] = {
183 .mask = PALMAS_INT1_STATUS_RPWRON,
184 },
185 [PALMAS_PWRDOWN_IRQ] = {
186 .mask = PALMAS_INT1_STATUS_PWRDOWN,
187 },
188 [PALMAS_HOTDIE_IRQ] = {
189 .mask = PALMAS_INT1_STATUS_HOTDIE,
190 },
191 [PALMAS_VSYS_MON_IRQ] = {
192 .mask = PALMAS_INT1_STATUS_VSYS_MON,
193 },
194 [PALMAS_VBAT_MON_IRQ] = {
195 .mask = PALMAS_INT1_STATUS_VBAT_MON,
196 },
197 /* INT2 IRQs*/
198 [PALMAS_RTC_ALARM_IRQ] = {
199 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
200 .reg_offset = 1,
201 },
202 [PALMAS_RTC_TIMER_IRQ] = {
203 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
204 .reg_offset = 1,
205 },
206 [PALMAS_WDT_IRQ] = {
207 .mask = PALMAS_INT2_STATUS_WDT,
208 .reg_offset = 1,
209 },
210 [PALMAS_BATREMOVAL_IRQ] = {
211 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
212 .reg_offset = 1,
213 },
214 [PALMAS_RESET_IN_IRQ] = {
215 .mask = PALMAS_INT2_STATUS_RESET_IN,
216 .reg_offset = 1,
217 },
218 [PALMAS_FBI_BB_IRQ] = {
219 .mask = PALMAS_INT2_STATUS_FBI_BB,
220 .reg_offset = 1,
221 },
222 [PALMAS_SHORT_IRQ] = {
223 .mask = PALMAS_INT2_STATUS_SHORT,
224 .reg_offset = 1,
225 },
226 [PALMAS_VAC_ACOK_IRQ] = {
227 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
228 .reg_offset = 1,
229 },
230 /* INT3 IRQs */
231 [PALMAS_GPADC_AUTO_0_IRQ] = {
232 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
233 .reg_offset = 2,
234 },
235 [PALMAS_GPADC_AUTO_1_IRQ] = {
236 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
237 .reg_offset = 2,
238 },
239 [PALMAS_GPADC_EOC_SW_IRQ] = {
240 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
241 .reg_offset = 2,
242 },
243 [PALMAS_GPADC_EOC_RT_IRQ] = {
244 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
245 .reg_offset = 2,
246 },
247 [PALMAS_ID_OTG_IRQ] = {
248 .mask = PALMAS_INT3_STATUS_ID_OTG,
249 .reg_offset = 2,
250 },
251 [PALMAS_ID_IRQ] = {
252 .mask = PALMAS_INT3_STATUS_ID,
253 .reg_offset = 2,
254 },
255 [PALMAS_VBUS_OTG_IRQ] = {
256 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
257 .reg_offset = 2,
258 },
259 [PALMAS_VBUS_IRQ] = {
260 .mask = PALMAS_INT3_STATUS_VBUS,
261 .reg_offset = 2,
262 },
263 /* INT4 IRQs */
264 [PALMAS_GPIO_0_IRQ] = {
265 .mask = PALMAS_INT4_STATUS_GPIO_0,
266 .reg_offset = 3,
267 },
268 [PALMAS_GPIO_1_IRQ] = {
269 .mask = PALMAS_INT4_STATUS_GPIO_1,
270 .reg_offset = 3,
271 },
272 [PALMAS_GPIO_2_IRQ] = {
273 .mask = PALMAS_INT4_STATUS_GPIO_2,
274 .reg_offset = 3,
275 },
276 [PALMAS_GPIO_3_IRQ] = {
277 .mask = PALMAS_INT4_STATUS_GPIO_3,
278 .reg_offset = 3,
279 },
280 [PALMAS_GPIO_4_IRQ] = {
281 .mask = PALMAS_INT4_STATUS_GPIO_4,
282 .reg_offset = 3,
283 },
284 [PALMAS_GPIO_5_IRQ] = {
285 .mask = PALMAS_INT4_STATUS_GPIO_5,
286 .reg_offset = 3,
287 },
288 [PALMAS_GPIO_6_IRQ] = {
289 .mask = PALMAS_INT4_STATUS_GPIO_6,
290 .reg_offset = 3,
291 },
292 [PALMAS_GPIO_7_IRQ] = {
293 .mask = PALMAS_INT4_STATUS_GPIO_7,
294 .reg_offset = 3,
295 },
296};
297
298static struct regmap_irq_chip palmas_irq_chip = {
299 .name = "palmas",
300 .irqs = palmas_irqs,
301 .num_irqs = ARRAY_SIZE(palmas_irqs),
302
303 .num_regs = 4,
304 .irq_reg_stride = 5,
305 .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
306 PALMAS_INT1_STATUS),
307 .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
308 PALMAS_INT1_MASK),
309};
310
311static int __devinit palmas_i2c_probe(struct i2c_client *i2c,
312 const struct i2c_device_id *id)
313{
314 struct palmas *palmas;
315 struct palmas_platform_data *pdata;
316 int ret = 0, i;
317 unsigned int reg, addr;
318 int slave;
319 struct mfd_cell *children;
320
321 pdata = dev_get_platdata(&i2c->dev);
322 if (!pdata)
323 return -EINVAL;
324
325 palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
326 if (palmas == NULL)
327 return -ENOMEM;
328
329 i2c_set_clientdata(i2c, palmas);
330 palmas->dev = &i2c->dev;
331 palmas->id = id->driver_data;
332 palmas->irq = i2c->irq;
333
334 for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
335 if (i == 0)
336 palmas->i2c_clients[i] = i2c;
337 else {
338 palmas->i2c_clients[i] =
339 i2c_new_dummy(i2c->adapter,
340 i2c->addr + i);
341 if (!palmas->i2c_clients[i]) {
342 dev_err(palmas->dev,
343 "can't attach client %d\n", i);
344 ret = -ENOMEM;
345 goto err;
346 }
347 }
348 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
349 &palmas_regmap_config[i]);
350 if (IS_ERR(palmas->regmap[i])) {
351 ret = PTR_ERR(palmas->regmap[i]);
352 dev_err(palmas->dev,
353 "Failed to allocate regmap %d, err: %d\n",
354 i, ret);
355 goto err;
356 }
357 }
358
359 /* Change IRQ into clear on read mode for efficiency */
360 slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
361 addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
362 reg = PALMAS_INT_CTRL_INT_CLEAR;
363
364 regmap_write(palmas->regmap[slave], addr, reg);
365
366 ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
367 IRQF_ONESHOT | IRQF_TRIGGER_LOW, -1, &palmas_irq_chip,
368 &palmas->irq_data);
369 if (ret < 0)
370 goto err;
371
372 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
373 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
374 PALMAS_PRIMARY_SECONDARY_PAD1);
375
376 if (pdata->mux_from_pdata) {
377 reg = pdata->pad1;
378 ret = regmap_write(palmas->regmap[slave], addr, reg);
379 if (ret)
380 goto err;
381 } else {
382 ret = regmap_read(palmas->regmap[slave], addr, ®);
383 if (ret)
384 goto err;
385 }
386
387 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
388 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
389 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
390 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
391 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
392 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
393 palmas->led_muxed |= PALMAS_LED1_MUXED;
394 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
395 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
396 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
397 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
398 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
399 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
400 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
401 palmas->led_muxed |= PALMAS_LED2_MUXED;
402 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
403 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
404 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
405 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
406 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
407
408 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
409 PALMAS_PRIMARY_SECONDARY_PAD2);
410
411 if (pdata->mux_from_pdata) {
412 reg = pdata->pad2;
413 ret = regmap_write(palmas->regmap[slave], addr, reg);
414 if (ret)
415 goto err;
416 } else {
417 ret = regmap_read(palmas->regmap[slave], addr, ®);
418 if (ret)
419 goto err;
420 }
421
422 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
423 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
424 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
425 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
426 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
427 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
428 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
429 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
430
431 dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
432 palmas->gpio_muxed, palmas->pwm_muxed,
433 palmas->led_muxed);
434
435 reg = pdata->power_ctrl;
436
437 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
438 addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
439
440 ret = regmap_write(palmas->regmap[slave], addr, reg);
441 if (ret)
442 goto err;
443
444 children = kmemdup(palmas_children, sizeof(palmas_children),
445 GFP_KERNEL);
446 if (!children) {
447 ret = -ENOMEM;
448 goto err;
449 }
450
451 children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
452 children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
453
454 ret = mfd_add_devices(palmas->dev, -1,
455 children, ARRAY_SIZE(palmas_children),
456 NULL, regmap_irq_chip_get_base(palmas->irq_data));
457 kfree(children);
458
459 if (ret < 0)
460 goto err;
461
462 return ret;
463
464err:
465 mfd_remove_devices(palmas->dev);
466 kfree(palmas);
467 return ret;
468}
469
470static int palmas_i2c_remove(struct i2c_client *i2c)
471{
472 struct palmas *palmas = i2c_get_clientdata(i2c);
473
474 mfd_remove_devices(palmas->dev);
475 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
476
477 return 0;
478}
479
480static const struct i2c_device_id palmas_i2c_id[] = {
481 { "palmas", },
482 { "twl6035", },
483 { "twl6037", },
484 { "tps65913", },
485 { /* end */ }
486};
487MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
488
489static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
490 { .compatible = "ti,palmas", },
491 { /* end */ }
492};
493
494static struct i2c_driver palmas_i2c_driver = {
495 .driver = {
496 .name = "palmas",
497 .of_match_table = of_palmas_match_tbl,
498 .owner = THIS_MODULE,
499 },
500 .probe = palmas_i2c_probe,
501 .remove = palmas_i2c_remove,
502 .id_table = palmas_i2c_id,
503};
504
505static int __init palmas_i2c_init(void)
506{
507 return i2c_add_driver(&palmas_i2c_driver);
508}
509/* init early so consumer devices can complete system boot */
510subsys_initcall(palmas_i2c_init);
511
512static void __exit palmas_i2c_exit(void)
513{
514 i2c_del_driver(&palmas_i2c_driver);
515}
516module_exit(palmas_i2c_exit);
517
518MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
519MODULE_DESCRIPTION("Palmas chip family multi-function driver");
520MODULE_LICENSE("GPL");