4 * Copyright 2011-2012 Texas Instruments Inc.
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
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.
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 #include <linux/of_platform.h>
42 static struct resource palmas_rtc_resources[] = {
44 .start = PALMAS_RTC_ALARM_IRQ,
45 .end = PALMAS_RTC_ALARM_IRQ,
46 .flags = IORESOURCE_IRQ,
50 static const struct mfd_cell palmas_children[] = {
52 .name = "palmas-pmic",
56 .name = "palmas-gpio",
60 .name = "palmas-leds",
70 .resources = &palmas_rtc_resources[0],
71 .num_resources = ARRAY_SIZE(palmas_rtc_resources),
74 .name = "palmas-pwrbutton",
75 .id = PALMAS_PWRBUTTON_ID,
78 .name = "palmas-gpadc",
79 .id = PALMAS_GPADC_ID,
82 .name = "palmas-resource",
83 .id = PALMAS_RESOURCE_ID,
99 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
103 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
104 PALMAS_PRIMARY_SECONDARY_PAD3),
109 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
110 PALMAS_GPADC_SMPS_VSEL_MONITORING),
115 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
116 PALMAS_GPADC_TRIM16),
120 static const struct regmap_irq palmas_irqs[] = {
122 [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
123 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
125 [PALMAS_PWRON_IRQ] = {
126 .mask = PALMAS_INT1_STATUS_PWRON,
128 [PALMAS_LONG_PRESS_KEY_IRQ] = {
129 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
131 [PALMAS_RPWRON_IRQ] = {
132 .mask = PALMAS_INT1_STATUS_RPWRON,
134 [PALMAS_PWRDOWN_IRQ] = {
135 .mask = PALMAS_INT1_STATUS_PWRDOWN,
137 [PALMAS_HOTDIE_IRQ] = {
138 .mask = PALMAS_INT1_STATUS_HOTDIE,
140 [PALMAS_VSYS_MON_IRQ] = {
141 .mask = PALMAS_INT1_STATUS_VSYS_MON,
143 [PALMAS_VBAT_MON_IRQ] = {
144 .mask = PALMAS_INT1_STATUS_VBAT_MON,
147 [PALMAS_RTC_ALARM_IRQ] = {
148 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
151 [PALMAS_RTC_TIMER_IRQ] = {
152 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
156 .mask = PALMAS_INT2_STATUS_WDT,
159 [PALMAS_BATREMOVAL_IRQ] = {
160 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
163 [PALMAS_RESET_IN_IRQ] = {
164 .mask = PALMAS_INT2_STATUS_RESET_IN,
167 [PALMAS_FBI_BB_IRQ] = {
168 .mask = PALMAS_INT2_STATUS_FBI_BB,
171 [PALMAS_SHORT_IRQ] = {
172 .mask = PALMAS_INT2_STATUS_SHORT,
175 [PALMAS_VAC_ACOK_IRQ] = {
176 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
180 [PALMAS_GPADC_AUTO_0_IRQ] = {
181 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
184 [PALMAS_GPADC_AUTO_1_IRQ] = {
185 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
188 [PALMAS_GPADC_EOC_SW_IRQ] = {
189 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
192 [PALMAS_GPADC_EOC_RT_IRQ] = {
193 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
196 [PALMAS_ID_OTG_IRQ] = {
197 .mask = PALMAS_INT3_STATUS_ID_OTG,
201 .mask = PALMAS_INT3_STATUS_ID,
204 [PALMAS_VBUS_OTG_IRQ] = {
205 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
208 [PALMAS_VBUS_IRQ] = {
209 .mask = PALMAS_INT3_STATUS_VBUS,
213 [PALMAS_GPIO_0_IRQ] = {
214 .mask = PALMAS_INT4_STATUS_GPIO_0,
217 [PALMAS_GPIO_1_IRQ] = {
218 .mask = PALMAS_INT4_STATUS_GPIO_1,
221 [PALMAS_GPIO_2_IRQ] = {
222 .mask = PALMAS_INT4_STATUS_GPIO_2,
225 [PALMAS_GPIO_3_IRQ] = {
226 .mask = PALMAS_INT4_STATUS_GPIO_3,
229 [PALMAS_GPIO_4_IRQ] = {
230 .mask = PALMAS_INT4_STATUS_GPIO_4,
233 [PALMAS_GPIO_5_IRQ] = {
234 .mask = PALMAS_INT4_STATUS_GPIO_5,
237 [PALMAS_GPIO_6_IRQ] = {
238 .mask = PALMAS_INT4_STATUS_GPIO_6,
241 [PALMAS_GPIO_7_IRQ] = {
242 .mask = PALMAS_INT4_STATUS_GPIO_7,
247 static struct regmap_irq_chip palmas_irq_chip = {
250 .num_irqs = ARRAY_SIZE(palmas_irqs),
254 .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
256 .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
260 static void palmas_dt_to_pdata(struct device_node *node,
261 struct palmas_platform_data *pdata)
266 ret = of_property_read_u32(node, "ti,mux_pad1", &prop);
268 pdata->mux_from_pdata = 1;
272 ret = of_property_read_u32(node, "ti,mux_pad2", &prop);
274 pdata->mux_from_pdata = 1;
278 /* The default for this register is all masked */
279 ret = of_property_read_u32(node, "ti,power_ctrl", &prop);
281 pdata->power_ctrl = prop;
283 pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
284 PALMAS_POWER_CTRL_ENABLE1_MASK |
285 PALMAS_POWER_CTRL_ENABLE2_MASK;
288 static int palmas_i2c_probe(struct i2c_client *i2c,
289 const struct i2c_device_id *id)
291 struct palmas *palmas;
292 struct palmas_platform_data *pdata;
293 struct device_node *node = i2c->dev.of_node;
295 unsigned int reg, addr;
297 struct mfd_cell *children;
299 pdata = dev_get_platdata(&i2c->dev);
301 if (node && !pdata) {
302 pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
307 palmas_dt_to_pdata(node, pdata);
313 palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
317 i2c_set_clientdata(i2c, palmas);
318 palmas->dev = &i2c->dev;
319 palmas->id = id->driver_data;
320 palmas->irq = i2c->irq;
322 for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
324 palmas->i2c_clients[i] = i2c;
326 palmas->i2c_clients[i] =
327 i2c_new_dummy(i2c->adapter,
329 if (!palmas->i2c_clients[i]) {
331 "can't attach client %d\n", i);
336 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
337 &palmas_regmap_config[i]);
338 if (IS_ERR(palmas->regmap[i])) {
339 ret = PTR_ERR(palmas->regmap[i]);
341 "Failed to allocate regmap %d, err: %d\n",
347 /* Change IRQ into clear on read mode for efficiency */
348 slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
349 addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
350 reg = PALMAS_INT_CTRL_INT_CLEAR;
352 regmap_write(palmas->regmap[slave], addr, reg);
354 ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
355 IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
360 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
361 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
362 PALMAS_PRIMARY_SECONDARY_PAD1);
364 if (pdata->mux_from_pdata) {
366 ret = regmap_write(palmas->regmap[slave], addr, reg);
370 ret = regmap_read(palmas->regmap[slave], addr, ®);
375 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
376 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
377 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
378 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
379 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
380 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
381 palmas->led_muxed |= PALMAS_LED1_MUXED;
382 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
383 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
384 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
385 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
386 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
387 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
388 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
389 palmas->led_muxed |= PALMAS_LED2_MUXED;
390 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
391 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
392 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
393 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
394 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
396 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
397 PALMAS_PRIMARY_SECONDARY_PAD2);
399 if (pdata->mux_from_pdata) {
401 ret = regmap_write(palmas->regmap[slave], addr, reg);
405 ret = regmap_read(palmas->regmap[slave], addr, ®);
410 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
411 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
412 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
413 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
414 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
415 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
416 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
417 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
419 dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
420 palmas->gpio_muxed, palmas->pwm_muxed,
423 reg = pdata->power_ctrl;
425 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
426 addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
428 ret = regmap_write(palmas->regmap[slave], addr, reg);
433 * If we are probing with DT do this the DT way and return here
434 * otherwise continue and add devices using mfd helpers.
437 ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
444 children = kmemdup(palmas_children, sizeof(palmas_children),
451 children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
452 children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
454 children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
455 children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
457 children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
458 children[PALMAS_RESOURCE_ID].pdata_size =
459 sizeof(*pdata->resource_pdata);
461 children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
462 children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
464 children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
465 children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
467 ret = mfd_add_devices(palmas->dev, -1,
468 children, ARRAY_SIZE(palmas_children),
470 regmap_irq_get_domain(palmas->irq_data));
479 mfd_remove_devices(palmas->dev);
481 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
486 static int palmas_i2c_remove(struct i2c_client *i2c)
488 struct palmas *palmas = i2c_get_clientdata(i2c);
490 mfd_remove_devices(palmas->dev);
491 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
496 static const struct i2c_device_id palmas_i2c_id[] = {
503 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
505 static struct of_device_id of_palmas_match_tbl[] = {
506 { .compatible = "ti,palmas", },
510 static struct i2c_driver palmas_i2c_driver = {
513 .of_match_table = of_palmas_match_tbl,
514 .owner = THIS_MODULE,
516 .probe = palmas_i2c_probe,
517 .remove = palmas_i2c_remove,
518 .id_table = palmas_i2c_id,
521 static int __init palmas_i2c_init(void)
523 return i2c_add_driver(&palmas_i2c_driver);
525 /* init early so consumer devices can complete system boot */
526 subsys_initcall(palmas_i2c_init);
528 static void __exit palmas_i2c_exit(void)
530 i2c_del_driver(&palmas_i2c_driver);
532 module_exit(palmas_i2c_exit);
534 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
535 MODULE_DESCRIPTION("Palmas chip family multi-function driver");
536 MODULE_LICENSE("GPL");