2 * Core driver for ams AS3722 PMICs
4 * Copyright (C) 2013 AMS AG
5 * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
7 * Author: Florian Lobmaier <florian.lobmaier@ams.com>
8 * Author: Laxman Dewangan <ldewangan@nvidia.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/err.h>
26 #include <linux/i2c.h>
27 #include <linux/interrupt.h>
28 #include <linux/irq.h>
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/as3722.h>
34 #include <linux/regmap.h>
35 #include <linux/slab.h>
37 #define AS3722_DEVICE_ID 0x0C
39 static const struct resource as3722_rtc_resource[] = {
41 .name = "as3722-rtc-alarm",
42 .start = AS3722_IRQ_RTC_ALARM,
43 .end = AS3722_IRQ_RTC_ALARM,
44 .flags = IORESOURCE_IRQ,
48 static const struct resource as3722_adc_resource[] = {
51 .start = AS3722_IRQ_ADC,
52 .end = AS3722_IRQ_ADC,
53 .flags = IORESOURCE_IRQ,
57 static struct mfd_cell as3722_devs[] = {
59 .name = "as3722-pinctrl",
62 .name = "as3722-regulator",
66 .num_resources = ARRAY_SIZE(as3722_rtc_resource),
67 .resources = as3722_rtc_resource,
71 .num_resources = ARRAY_SIZE(as3722_adc_resource),
72 .resources = as3722_adc_resource,
75 .name = "as3722-power-off",
79 static const struct regmap_irq as3722_irqs[] = {
82 .mask = AS3722_INTERRUPT_MASK1_LID,
85 .mask = AS3722_INTERRUPT_MASK1_ACOK,
87 [AS3722_IRQ_ENABLE1] = {
88 .mask = AS3722_INTERRUPT_MASK1_ENABLE1,
90 [AS3722_IRQ_OCCUR_ALARM_SD0] = {
91 .mask = AS3722_INTERRUPT_MASK1_OCURR_ALARM_SD0,
93 [AS3722_IRQ_ONKEY_LONG_PRESS] = {
94 .mask = AS3722_INTERRUPT_MASK1_ONKEY_LONG,
96 [AS3722_IRQ_ONKEY] = {
97 .mask = AS3722_INTERRUPT_MASK1_ONKEY,
99 [AS3722_IRQ_OVTMP] = {
100 .mask = AS3722_INTERRUPT_MASK1_OVTMP,
102 [AS3722_IRQ_LOWBAT] = {
103 .mask = AS3722_INTERRUPT_MASK1_LOWBAT,
107 [AS3722_IRQ_SD0_LV] = {
108 .mask = AS3722_INTERRUPT_MASK2_SD0_LV,
111 [AS3722_IRQ_SD1_LV] = {
112 .mask = AS3722_INTERRUPT_MASK2_SD1_LV,
115 [AS3722_IRQ_SD2_LV] = {
116 .mask = AS3722_INTERRUPT_MASK2_SD2345_LV,
119 [AS3722_IRQ_PWM1_OV_PROT] = {
120 .mask = AS3722_INTERRUPT_MASK2_PWM1_OV_PROT,
123 [AS3722_IRQ_PWM2_OV_PROT] = {
124 .mask = AS3722_INTERRUPT_MASK2_PWM2_OV_PROT,
127 [AS3722_IRQ_ENABLE2] = {
128 .mask = AS3722_INTERRUPT_MASK2_ENABLE2,
131 [AS3722_IRQ_SD6_LV] = {
132 .mask = AS3722_INTERRUPT_MASK2_SD6_LV,
135 [AS3722_IRQ_RTC_REP] = {
136 .mask = AS3722_INTERRUPT_MASK2_RTC_REP,
141 [AS3722_IRQ_RTC_ALARM] = {
142 .mask = AS3722_INTERRUPT_MASK3_RTC_ALARM,
145 [AS3722_IRQ_GPIO1] = {
146 .mask = AS3722_INTERRUPT_MASK3_GPIO1,
149 [AS3722_IRQ_GPIO2] = {
150 .mask = AS3722_INTERRUPT_MASK3_GPIO2,
153 [AS3722_IRQ_GPIO3] = {
154 .mask = AS3722_INTERRUPT_MASK3_GPIO3,
157 [AS3722_IRQ_GPIO4] = {
158 .mask = AS3722_INTERRUPT_MASK3_GPIO4,
161 [AS3722_IRQ_GPIO5] = {
162 .mask = AS3722_INTERRUPT_MASK3_GPIO5,
165 [AS3722_IRQ_WATCHDOG] = {
166 .mask = AS3722_INTERRUPT_MASK3_WATCHDOG,
169 [AS3722_IRQ_ENABLE3] = {
170 .mask = AS3722_INTERRUPT_MASK3_ENABLE3,
175 [AS3722_IRQ_TEMP_SD0_SHUTDOWN] = {
176 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_SHUTDOWN,
179 [AS3722_IRQ_TEMP_SD1_SHUTDOWN] = {
180 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_SHUTDOWN,
183 [AS3722_IRQ_TEMP_SD2_SHUTDOWN] = {
184 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_SHUTDOWN,
187 [AS3722_IRQ_TEMP_SD0_ALARM] = {
188 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_ALARM,
191 [AS3722_IRQ_TEMP_SD1_ALARM] = {
192 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_ALARM,
195 [AS3722_IRQ_TEMP_SD6_ALARM] = {
196 .mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_ALARM,
199 [AS3722_IRQ_OCCUR_ALARM_SD6] = {
200 .mask = AS3722_INTERRUPT_MASK4_OCCUR_ALARM_SD6,
204 .mask = AS3722_INTERRUPT_MASK4_ADC,
209 static const struct regmap_irq_chip as3722_irq_chip = {
212 .num_irqs = ARRAY_SIZE(as3722_irqs),
214 .status_base = AS3722_INTERRUPT_STATUS1_REG,
215 .mask_base = AS3722_INTERRUPT_MASK1_REG,
218 static int as3722_check_device_id(struct as3722 *as3722)
223 /* Check that this is actually a AS3722 */
224 ret = as3722_read(as3722, AS3722_ASIC_ID1_REG, &val);
226 dev_err(as3722->dev, "ASIC_ID1 read failed: %d\n", ret);
230 if (val != AS3722_DEVICE_ID) {
231 dev_err(as3722->dev, "Device is not AS3722, ID is 0x%x\n", val);
235 ret = as3722_read(as3722, AS3722_ASIC_ID2_REG, &val);
237 dev_err(as3722->dev, "ASIC_ID2 read failed: %d\n", ret);
241 dev_info(as3722->dev, "AS3722 with revision 0x%x found\n", val);
245 static int as3722_configure_pullups(struct as3722 *as3722)
250 if (as3722->en_intern_int_pullup)
251 val |= AS3722_INT_PULL_UP;
252 if (as3722->en_intern_i2c_pullup)
253 val |= AS3722_I2C_PULL_UP;
255 ret = as3722_update_bits(as3722, AS3722_IOVOLTAGE_REG,
256 AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, val);
258 dev_err(as3722->dev, "IOVOLTAGE_REG update failed: %d\n", ret);
262 static const struct regmap_range as3722_readable_ranges[] = {
263 regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
264 regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
265 regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_REG_SEQU_MOD3_REG),
266 regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
267 regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
268 regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
269 AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
270 regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
271 regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
272 regmap_reg_range(AS3722_RTC_ACCESS_REG, AS3722_RTC_ACCESS_REG),
273 regmap_reg_range(AS3722_RTC_STATUS_REG, AS3722_TEMP_STATUS_REG),
274 regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC_CONFIGURATION_REG),
275 regmap_reg_range(AS3722_ASIC_ID1_REG, AS3722_ASIC_ID2_REG),
276 regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
279 static const struct regmap_access_table as3722_readable_table = {
280 .yes_ranges = as3722_readable_ranges,
281 .n_yes_ranges = ARRAY_SIZE(as3722_readable_ranges),
284 static const struct regmap_range as3722_writable_ranges[] = {
285 regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
286 regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
287 regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_GPIO_SIGNAL_OUT_REG),
288 regmap_reg_range(AS3722_REG_SEQU_MOD1_REG, AS3722_REG_SEQU_MOD3_REG),
289 regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
290 regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
291 regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
292 AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
293 regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
294 regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
295 regmap_reg_range(AS3722_INTERRUPT_MASK1_REG, AS3722_TEMP_STATUS_REG),
296 regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC1_CONTROL_REG),
297 regmap_reg_range(AS3722_ADC1_THRESHOLD_HI_MSB_REG,
298 AS3722_ADC_CONFIGURATION_REG),
299 regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
302 static const struct regmap_access_table as3722_writable_table = {
303 .yes_ranges = as3722_writable_ranges,
304 .n_yes_ranges = ARRAY_SIZE(as3722_writable_ranges),
307 static const struct regmap_range as3722_cacheable_ranges[] = {
308 regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_LDO11_VOLTAGE_REG),
309 regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_LDOCONTROL1_REG),
312 static const struct regmap_access_table as3722_volatile_table = {
313 .no_ranges = as3722_cacheable_ranges,
314 .n_no_ranges = ARRAY_SIZE(as3722_cacheable_ranges),
317 static const struct regmap_config as3722_regmap_config = {
320 .max_register = AS3722_MAX_REGISTER,
321 .cache_type = REGCACHE_RBTREE,
322 .rd_table = &as3722_readable_table,
323 .wr_table = &as3722_writable_table,
324 .volatile_table = &as3722_volatile_table,
327 static int as3722_i2c_of_probe(struct i2c_client *i2c,
328 struct as3722 *as3722)
330 struct device_node *np = i2c->dev.of_node;
331 struct irq_data *irq_data;
334 dev_err(&i2c->dev, "Device Tree not found\n");
338 irq_data = irq_get_irq_data(i2c->irq);
340 dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
344 as3722->en_intern_int_pullup = of_property_read_bool(np,
345 "ams,enable-internal-int-pullup");
346 as3722->en_intern_i2c_pullup = of_property_read_bool(np,
347 "ams,enable-internal-i2c-pullup");
348 as3722->irq_flags = irqd_get_trigger_type(irq_data);
349 dev_dbg(&i2c->dev, "IRQ flags are 0x%08lx\n", as3722->irq_flags);
353 static int as3722_i2c_probe(struct i2c_client *i2c,
354 const struct i2c_device_id *id)
356 struct as3722 *as3722;
357 unsigned long irq_flags;
360 as3722 = devm_kzalloc(&i2c->dev, sizeof(struct as3722), GFP_KERNEL);
364 as3722->dev = &i2c->dev;
365 as3722->chip_irq = i2c->irq;
366 i2c_set_clientdata(i2c, as3722);
368 ret = as3722_i2c_of_probe(i2c, as3722);
372 as3722->regmap = devm_regmap_init_i2c(i2c, &as3722_regmap_config);
373 if (IS_ERR(as3722->regmap)) {
374 ret = PTR_ERR(as3722->regmap);
375 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
379 ret = as3722_check_device_id(as3722);
383 irq_flags = as3722->irq_flags | IRQF_ONESHOT;
384 ret = regmap_add_irq_chip(as3722->regmap, as3722->chip_irq,
385 irq_flags, -1, &as3722_irq_chip,
388 dev_err(as3722->dev, "Failed to add regmap irq: %d\n", ret);
392 ret = as3722_configure_pullups(as3722);
396 ret = mfd_add_devices(&i2c->dev, -1, as3722_devs,
397 ARRAY_SIZE(as3722_devs), NULL, 0,
398 regmap_irq_get_domain(as3722->irq_data));
400 dev_err(as3722->dev, "Failed to add MFD devices: %d\n", ret);
404 dev_dbg(as3722->dev, "AS3722 core driver initialized successfully\n");
408 regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
412 static int as3722_i2c_remove(struct i2c_client *i2c)
414 struct as3722 *as3722 = i2c_get_clientdata(i2c);
416 mfd_remove_devices(as3722->dev);
417 regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
421 static const struct of_device_id as3722_of_match[] = {
422 { .compatible = "ams,as3722", },
425 MODULE_DEVICE_TABLE(of, as3722_of_match);
427 static const struct i2c_device_id as3722_i2c_id[] = {
431 MODULE_DEVICE_TABLE(i2c, as3722_i2c_id);
433 static struct i2c_driver as3722_i2c_driver = {
436 .owner = THIS_MODULE,
437 .of_match_table = as3722_of_match,
439 .probe = as3722_i2c_probe,
440 .remove = as3722_i2c_remove,
441 .id_table = as3722_i2c_id,
444 module_i2c_driver(as3722_i2c_driver);
446 MODULE_DESCRIPTION("I2C support for AS3722 PMICs");
447 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
448 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
449 MODULE_LICENSE("GPL");