blob: cb52783390c1420ec2970f1d777ce5bd89501a1d [file] [log] [blame]
Graeme Gregory2945fbc2012-05-15 15:48:56 +09001/*
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>
Graeme Gregory9c14ac32012-08-28 13:47:38 +020026#include <linux/of_platform.h>
Graeme Gregory2945fbc2012-05-15 15:48:56 +090027
Graeme Gregory2945fbc2012-05-15 15:48:56 +090028enum palmas_ids {
29 PALMAS_PMIC_ID,
30 PALMAS_GPIO_ID,
31 PALMAS_LEDS_ID,
32 PALMAS_WDT_ID,
33 PALMAS_RTC_ID,
34 PALMAS_PWRBUTTON_ID,
35 PALMAS_GPADC_ID,
36 PALMAS_RESOURCE_ID,
37 PALMAS_CLK_ID,
38 PALMAS_PWM_ID,
39 PALMAS_USB_ID,
40};
41
42static const struct mfd_cell palmas_children[] = {
43 {
44 .name = "palmas-pmic",
45 .id = PALMAS_PMIC_ID,
46 },
47 {
48 .name = "palmas-gpio",
49 .id = PALMAS_GPIO_ID,
50 },
51 {
52 .name = "palmas-leds",
53 .id = PALMAS_LEDS_ID,
54 },
55 {
56 .name = "palmas-wdt",
57 .id = PALMAS_WDT_ID,
58 },
59 {
60 .name = "palmas-rtc",
Graeme Gregory2945fbc2012-05-15 15:48:56 +090061 .id = PALMAS_RTC_ID,
62 },
63 {
64 .name = "palmas-pwrbutton",
Graeme Gregory2945fbc2012-05-15 15:48:56 +090065 .id = PALMAS_PWRBUTTON_ID,
66 },
67 {
68 .name = "palmas-gpadc",
Graeme Gregory2945fbc2012-05-15 15:48:56 +090069 .id = PALMAS_GPADC_ID,
70 },
71 {
72 .name = "palmas-resource",
73 .id = PALMAS_RESOURCE_ID,
74 },
75 {
76 .name = "palmas-clk",
77 .id = PALMAS_CLK_ID,
78 },
79 {
80 .name = "palmas-pwm",
81 .id = PALMAS_PWM_ID,
82 },
83 {
84 .name = "palmas-usb",
Graeme Gregory2945fbc2012-05-15 15:48:56 +090085 .id = PALMAS_USB_ID,
86 }
87};
88
89static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
90 {
91 .reg_bits = 8,
92 .val_bits = 8,
93 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
94 PALMAS_PRIMARY_SECONDARY_PAD3),
95 },
96 {
97 .reg_bits = 8,
98 .val_bits = 8,
99 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
100 PALMAS_GPADC_SMPS_VSEL_MONITORING),
101 },
102 {
103 .reg_bits = 8,
104 .val_bits = 8,
105 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
106 PALMAS_GPADC_TRIM16),
107 },
108};
109
110static const struct regmap_irq palmas_irqs[] = {
111 /* INT1 IRQs */
112 [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
113 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
114 },
115 [PALMAS_PWRON_IRQ] = {
116 .mask = PALMAS_INT1_STATUS_PWRON,
117 },
118 [PALMAS_LONG_PRESS_KEY_IRQ] = {
119 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
120 },
121 [PALMAS_RPWRON_IRQ] = {
122 .mask = PALMAS_INT1_STATUS_RPWRON,
123 },
124 [PALMAS_PWRDOWN_IRQ] = {
125 .mask = PALMAS_INT1_STATUS_PWRDOWN,
126 },
127 [PALMAS_HOTDIE_IRQ] = {
128 .mask = PALMAS_INT1_STATUS_HOTDIE,
129 },
130 [PALMAS_VSYS_MON_IRQ] = {
131 .mask = PALMAS_INT1_STATUS_VSYS_MON,
132 },
133 [PALMAS_VBAT_MON_IRQ] = {
134 .mask = PALMAS_INT1_STATUS_VBAT_MON,
135 },
136 /* INT2 IRQs*/
137 [PALMAS_RTC_ALARM_IRQ] = {
138 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
139 .reg_offset = 1,
140 },
141 [PALMAS_RTC_TIMER_IRQ] = {
142 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
143 .reg_offset = 1,
144 },
145 [PALMAS_WDT_IRQ] = {
146 .mask = PALMAS_INT2_STATUS_WDT,
147 .reg_offset = 1,
148 },
149 [PALMAS_BATREMOVAL_IRQ] = {
150 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
151 .reg_offset = 1,
152 },
153 [PALMAS_RESET_IN_IRQ] = {
154 .mask = PALMAS_INT2_STATUS_RESET_IN,
155 .reg_offset = 1,
156 },
157 [PALMAS_FBI_BB_IRQ] = {
158 .mask = PALMAS_INT2_STATUS_FBI_BB,
159 .reg_offset = 1,
160 },
161 [PALMAS_SHORT_IRQ] = {
162 .mask = PALMAS_INT2_STATUS_SHORT,
163 .reg_offset = 1,
164 },
165 [PALMAS_VAC_ACOK_IRQ] = {
166 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
167 .reg_offset = 1,
168 },
169 /* INT3 IRQs */
170 [PALMAS_GPADC_AUTO_0_IRQ] = {
171 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
172 .reg_offset = 2,
173 },
174 [PALMAS_GPADC_AUTO_1_IRQ] = {
175 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
176 .reg_offset = 2,
177 },
178 [PALMAS_GPADC_EOC_SW_IRQ] = {
179 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
180 .reg_offset = 2,
181 },
182 [PALMAS_GPADC_EOC_RT_IRQ] = {
183 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
184 .reg_offset = 2,
185 },
186 [PALMAS_ID_OTG_IRQ] = {
187 .mask = PALMAS_INT3_STATUS_ID_OTG,
188 .reg_offset = 2,
189 },
190 [PALMAS_ID_IRQ] = {
191 .mask = PALMAS_INT3_STATUS_ID,
192 .reg_offset = 2,
193 },
194 [PALMAS_VBUS_OTG_IRQ] = {
195 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
196 .reg_offset = 2,
197 },
198 [PALMAS_VBUS_IRQ] = {
199 .mask = PALMAS_INT3_STATUS_VBUS,
200 .reg_offset = 2,
201 },
202 /* INT4 IRQs */
203 [PALMAS_GPIO_0_IRQ] = {
204 .mask = PALMAS_INT4_STATUS_GPIO_0,
205 .reg_offset = 3,
206 },
207 [PALMAS_GPIO_1_IRQ] = {
208 .mask = PALMAS_INT4_STATUS_GPIO_1,
209 .reg_offset = 3,
210 },
211 [PALMAS_GPIO_2_IRQ] = {
212 .mask = PALMAS_INT4_STATUS_GPIO_2,
213 .reg_offset = 3,
214 },
215 [PALMAS_GPIO_3_IRQ] = {
216 .mask = PALMAS_INT4_STATUS_GPIO_3,
217 .reg_offset = 3,
218 },
219 [PALMAS_GPIO_4_IRQ] = {
220 .mask = PALMAS_INT4_STATUS_GPIO_4,
221 .reg_offset = 3,
222 },
223 [PALMAS_GPIO_5_IRQ] = {
224 .mask = PALMAS_INT4_STATUS_GPIO_5,
225 .reg_offset = 3,
226 },
227 [PALMAS_GPIO_6_IRQ] = {
228 .mask = PALMAS_INT4_STATUS_GPIO_6,
229 .reg_offset = 3,
230 },
231 [PALMAS_GPIO_7_IRQ] = {
232 .mask = PALMAS_INT4_STATUS_GPIO_7,
233 .reg_offset = 3,
234 },
235};
236
237static struct regmap_irq_chip palmas_irq_chip = {
238 .name = "palmas",
239 .irqs = palmas_irqs,
240 .num_irqs = ARRAY_SIZE(palmas_irqs),
241
242 .num_regs = 4,
243 .irq_reg_stride = 5,
244 .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
245 PALMAS_INT1_STATUS),
246 .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
247 PALMAS_INT1_MASK),
248};
249
Bill Pembertonf791be42012-11-19 13:23:04 -0500250static void palmas_dt_to_pdata(struct device_node *node,
Graeme Gregory9c14ac32012-08-28 13:47:38 +0200251 struct palmas_platform_data *pdata)
252{
253 int ret;
254 u32 prop;
255
256 ret = of_property_read_u32(node, "ti,mux_pad1", &prop);
257 if (!ret) {
258 pdata->mux_from_pdata = 1;
259 pdata->pad1 = prop;
260 }
261
262 ret = of_property_read_u32(node, "ti,mux_pad2", &prop);
263 if (!ret) {
264 pdata->mux_from_pdata = 1;
265 pdata->pad2 = prop;
266 }
267
268 /* The default for this register is all masked */
269 ret = of_property_read_u32(node, "ti,power_ctrl", &prop);
270 if (!ret)
271 pdata->power_ctrl = prop;
272 else
273 pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
274 PALMAS_POWER_CTRL_ENABLE1_MASK |
275 PALMAS_POWER_CTRL_ENABLE2_MASK;
276}
277
Bill Pembertonf791be42012-11-19 13:23:04 -0500278static int palmas_i2c_probe(struct i2c_client *i2c,
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900279 const struct i2c_device_id *id)
280{
281 struct palmas *palmas;
282 struct palmas_platform_data *pdata;
Graeme Gregory9c14ac32012-08-28 13:47:38 +0200283 struct device_node *node = i2c->dev.of_node;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900284 int ret = 0, i;
285 unsigned int reg, addr;
286 int slave;
287 struct mfd_cell *children;
288
289 pdata = dev_get_platdata(&i2c->dev);
Graeme Gregory9c14ac32012-08-28 13:47:38 +0200290
291 if (node && !pdata) {
292 pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
293
294 if (!pdata)
295 return -ENOMEM;
296
297 palmas_dt_to_pdata(node, pdata);
298 }
299
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900300 if (!pdata)
301 return -EINVAL;
302
303 palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
304 if (palmas == NULL)
305 return -ENOMEM;
306
307 i2c_set_clientdata(i2c, palmas);
308 palmas->dev = &i2c->dev;
309 palmas->id = id->driver_data;
310 palmas->irq = i2c->irq;
311
312 for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
313 if (i == 0)
314 palmas->i2c_clients[i] = i2c;
315 else {
316 palmas->i2c_clients[i] =
317 i2c_new_dummy(i2c->adapter,
318 i2c->addr + i);
319 if (!palmas->i2c_clients[i]) {
320 dev_err(palmas->dev,
321 "can't attach client %d\n", i);
322 ret = -ENOMEM;
323 goto err;
324 }
325 }
326 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
327 &palmas_regmap_config[i]);
328 if (IS_ERR(palmas->regmap[i])) {
329 ret = PTR_ERR(palmas->regmap[i]);
330 dev_err(palmas->dev,
331 "Failed to allocate regmap %d, err: %d\n",
332 i, ret);
333 goto err;
334 }
335 }
336
Graeme Gregoryb330f852012-06-22 13:36:19 +0100337 /* Change IRQ into clear on read mode for efficiency */
338 slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
339 addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
340 reg = PALMAS_INT_CTRL_INT_CLEAR;
341
342 regmap_write(palmas->regmap[slave], addr, reg);
343
344 ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
Graeme Gregory8664fad2012-08-28 13:47:36 +0200345 IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900346 &palmas->irq_data);
347 if (ret < 0)
348 goto err;
349
350 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
351 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
352 PALMAS_PRIMARY_SECONDARY_PAD1);
353
354 if (pdata->mux_from_pdata) {
355 reg = pdata->pad1;
356 ret = regmap_write(palmas->regmap[slave], addr, reg);
357 if (ret)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200358 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900359 } else {
360 ret = regmap_read(palmas->regmap[slave], addr, &reg);
361 if (ret)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200362 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900363 }
364
365 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
366 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
367 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
368 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
369 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
370 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
371 palmas->led_muxed |= PALMAS_LED1_MUXED;
372 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
373 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
374 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
375 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
376 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
377 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
378 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
379 palmas->led_muxed |= PALMAS_LED2_MUXED;
380 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
381 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
382 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
383 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
384 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
385
386 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
387 PALMAS_PRIMARY_SECONDARY_PAD2);
388
389 if (pdata->mux_from_pdata) {
390 reg = pdata->pad2;
391 ret = regmap_write(palmas->regmap[slave], addr, reg);
392 if (ret)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200393 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900394 } else {
395 ret = regmap_read(palmas->regmap[slave], addr, &reg);
396 if (ret)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200397 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900398 }
399
400 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
401 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
402 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
403 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
404 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
405 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
406 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
407 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
408
409 dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
410 palmas->gpio_muxed, palmas->pwm_muxed,
411 palmas->led_muxed);
412
413 reg = pdata->power_ctrl;
414
415 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
416 addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
417
418 ret = regmap_write(palmas->regmap[slave], addr, reg);
419 if (ret)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200420 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900421
Graeme Gregory9c14ac32012-08-28 13:47:38 +0200422 /*
423 * If we are probing with DT do this the DT way and return here
424 * otherwise continue and add devices using mfd helpers.
425 */
426 if (node) {
427 ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
428 if (ret < 0)
429 goto err_irq;
430 else
431 return ret;
432 }
433
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900434 children = kmemdup(palmas_children, sizeof(palmas_children),
435 GFP_KERNEL);
436 if (!children) {
437 ret = -ENOMEM;
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200438 goto err_irq;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900439 }
440
Graeme Gregoryadc20e02012-06-22 13:36:18 +0100441 children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
442 children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
443
Graeme Gregory190ef1a2012-08-28 13:47:37 +0200444 children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
445 children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
446
447 children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
448 children[PALMAS_RESOURCE_ID].pdata_size =
449 sizeof(*pdata->resource_pdata);
450
451 children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
452 children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
453
454 children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
455 children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
456
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900457 ret = mfd_add_devices(palmas->dev, -1,
458 children, ARRAY_SIZE(palmas_children),
Mark Brown55692af2012-09-11 15:16:36 +0800459 NULL, regmap_irq_chip_get_base(palmas->irq_data),
460 NULL);
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900461 kfree(children);
462
463 if (ret < 0)
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200464 goto err_devices;
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900465
466 return ret;
467
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200468err_devices:
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900469 mfd_remove_devices(palmas->dev);
Graeme Gregory3f78dec2012-08-28 13:47:35 +0200470err_irq:
471 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
472err:
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900473 return ret;
474}
475
476static int palmas_i2c_remove(struct i2c_client *i2c)
477{
478 struct palmas *palmas = i2c_get_clientdata(i2c);
479
480 mfd_remove_devices(palmas->dev);
481 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
482
483 return 0;
484}
485
486static const struct i2c_device_id palmas_i2c_id[] = {
487 { "palmas", },
488 { "twl6035", },
489 { "twl6037", },
490 { "tps65913", },
Axel Lin00ba81c2012-05-21 23:33:22 +0800491 { /* end */ }
Graeme Gregory2945fbc2012-05-15 15:48:56 +0900492};
493MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
494
495static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
496 { .compatible = "ti,palmas", },
497 { /* end */ }
498};
499
500static struct i2c_driver palmas_i2c_driver = {
501 .driver = {
502 .name = "palmas",
503 .of_match_table = of_palmas_match_tbl,
504 .owner = THIS_MODULE,
505 },
506 .probe = palmas_i2c_probe,
507 .remove = palmas_i2c_remove,
508 .id_table = palmas_i2c_id,
509};
510
511static int __init palmas_i2c_init(void)
512{
513 return i2c_add_driver(&palmas_i2c_driver);
514}
515/* init early so consumer devices can complete system boot */
516subsys_initcall(palmas_i2c_init);
517
518static void __exit palmas_i2c_exit(void)
519{
520 i2c_del_driver(&palmas_i2c_driver);
521}
522module_exit(palmas_i2c_exit);
523
524MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
525MODULE_DESCRIPTION("Palmas chip family multi-function driver");
526MODULE_LICENSE("GPL");