2 * MFD core driver for Rockchip RK808
4 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
6 * Author: Chris Zhong <zyw@rock-chips.com>
7 * Author: Zhang Qing <zhangqing@rock-chips.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms and conditions of the GNU General Public License,
11 * version 2, as published by the Free Software Foundation.
13 * This program is distributed in the hope it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 #include <linux/i2c.h>
20 #include <linux/interrupt.h>
21 #include <linux/mfd/rk808.h>
22 #include <linux/mfd/core.h>
23 #include <linux/module.h>
24 #include <linux/regmap.h>
25 #include <linux/of_device.h>
27 struct rk808_reg_data {
33 struct rk8xx_power_data {
35 const struct rk808_reg_data *rk8xx_pre_init_reg;
37 const struct regmap_config *rk8xx_regmap_config;
38 const struct mfd_cell *rk8xx_cell;
40 struct regmap_irq_chip *rk8xx_irq_chip;
41 int (*pm_shutdown)(struct regmap *regmap);
44 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
48 * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
49 * we don't use that feature. It's better to cache.
50 * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
51 * bits are cleared in case when we shutoff anyway, but better safe.
55 case RK808_SECONDS_REG ... RK808_WEEKS_REG:
56 case RK808_RTC_STATUS_REG:
57 case RK808_VB_MON_REG:
58 case RK808_THERMAL_REG:
59 case RK808_DCDC_UV_STS_REG:
60 case RK808_LDO_UV_STS_REG:
61 case RK808_DCDC_PG_REG:
62 case RK808_LDO_PG_REG:
63 case RK808_DEVCTRL_REG:
64 case RK808_INT_STS_REG1:
65 case RK808_INT_STS_REG2:
72 static int rk808_shutdown(struct regmap *regmap)
76 ret = regmap_update_bits(regmap,
78 DEV_OFF_RST, DEV_OFF_RST);
82 static int rk818_shutdown(struct regmap *regmap)
86 ret = regmap_update_bits(regmap,
92 static bool rk818_is_volatile_reg(struct device *dev, unsigned int reg)
96 * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
97 * we don't use that feature. It's better to cache.
98 * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
99 * bits are cleared in case when we shutoff anyway, but better safe.
103 case RK808_SECONDS_REG ... RK808_WEEKS_REG:
104 case RK808_RTC_STATUS_REG:
105 case RK808_VB_MON_REG:
106 case RK808_THERMAL_REG:
107 case RK808_DCDC_EN_REG:
108 case RK808_DCDC_UV_STS_REG:
109 case RK808_LDO_UV_STS_REG:
110 case RK808_DCDC_PG_REG:
111 case RK808_LDO_PG_REG:
112 case RK808_DEVCTRL_REG:
113 case RK808_INT_STS_REG1:
114 case RK808_INT_STS_REG2:
115 case RK808_INT_STS_MSK_REG1:
116 case RK808_INT_STS_MSK_REG2:
117 case RK818_SUP_STS_REG ... RK818_SAVE_DATA19:
124 static const struct regmap_config rk808_regmap_config = {
127 .max_register = RK808_IO_POL_REG,
128 .cache_type = REGCACHE_RBTREE,
129 .volatile_reg = rk808_is_volatile_reg,
132 static struct resource rtc_resources[] = {
134 .start = RK808_IRQ_RTC_ALARM,
135 .end = RK808_IRQ_RTC_ALARM,
136 .flags = IORESOURCE_IRQ,
140 static const struct mfd_cell rk808s[] = {
141 { .name = "rk808-clkout", },
142 { .name = "rk808-regulator", },
145 .num_resources = ARRAY_SIZE(rtc_resources),
146 .resources = &rtc_resources[0],
150 static const struct rk808_reg_data pre_init_reg[] = {
151 { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
152 { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
153 { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
154 { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA },
155 { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA },
156 { RK808_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
157 { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
161 static const struct regmap_irq rk808_irqs[] = {
163 [RK808_IRQ_VOUT_LO] = {
164 .mask = RK808_IRQ_VOUT_LO_MSK,
167 [RK808_IRQ_VB_LO] = {
168 .mask = RK808_IRQ_VB_LO_MSK,
171 [RK808_IRQ_PWRON] = {
172 .mask = RK808_IRQ_PWRON_MSK,
175 [RK808_IRQ_PWRON_LP] = {
176 .mask = RK808_IRQ_PWRON_LP_MSK,
179 [RK808_IRQ_HOTDIE] = {
180 .mask = RK808_IRQ_HOTDIE_MSK,
183 [RK808_IRQ_RTC_ALARM] = {
184 .mask = RK808_IRQ_RTC_ALARM_MSK,
187 [RK808_IRQ_RTC_PERIOD] = {
188 .mask = RK808_IRQ_RTC_PERIOD_MSK,
193 [RK808_IRQ_PLUG_IN_INT] = {
194 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
197 [RK808_IRQ_PLUG_OUT_INT] = {
198 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
203 static struct regmap_irq_chip rk808_irq_chip = {
206 .num_irqs = ARRAY_SIZE(rk808_irqs),
209 .status_base = RK808_INT_STS_REG1,
210 .mask_base = RK808_INT_STS_MSK_REG1,
211 .ack_base = RK808_INT_STS_REG1,
212 .init_ack_masked = true,
215 static const struct regmap_config rk818_regmap_config = {
218 .max_register = RK818_SAVE_DATA19,
219 .cache_type = REGCACHE_RBTREE,
220 .volatile_reg = rk818_is_volatile_reg,
223 static const struct mfd_cell rk818s[] = {
224 { .name = "rk808-clkout", },
225 { .name = "rk818-regulator", },
226 { .name = "rk818-battery", .of_compatible = "rk818-battery", },
227 { .name = "rk818-charger", },
230 .num_resources = ARRAY_SIZE(rtc_resources),
231 .resources = &rtc_resources[0],
235 static const struct rk808_reg_data rk818_pre_init_reg[] = {
236 { RK818_H5V_EN_REG, REF_RDY_CTRL_ENABLE | H5V_EN_MASK,
237 REF_RDY_CTRL_ENABLE | H5V_EN_ENABLE },
238 { RK818_DCDC_EN_REG, BOOST_EN_MASK | SWITCH_EN_MASK,
239 BOOST_EN_ENABLE | SWITCH_EN_ENABLE },
240 { RK818_SLEEP_SET_OFF_REG1, OTG_SLP_SET_MASK, OTG_SLP_SET_OFF },
241 { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA },
244 static const struct regmap_irq rk818_irqs[] = {
246 [RK818_IRQ_VOUT_LO] = {
247 .mask = VOUT_LO_MASK,
250 [RK818_IRQ_VB_LO] = {
254 [RK818_IRQ_PWRON] = {
258 [RK818_IRQ_PWRON_LP] = {
259 .mask = PWRON_LP_MASK,
262 [RK818_IRQ_HOTDIE] = {
266 [RK818_IRQ_RTC_ALARM] = {
267 .mask = RTC_ALARM_MASK,
270 [RK818_IRQ_RTC_PERIOD] = {
271 .mask = RTC_PERIOD_MASK,
274 [RK818_IRQ_USB_OV] = {
279 [RK818_IRQ_PLUG_IN] = {
280 .mask = PLUG_IN_MASK,
283 [RK818_IRQ_PLUG_OUT] = {
284 .mask = PLUG_OUT_MASK,
287 [RK818_IRQ_CHG_OK] = {
291 [RK818_IRQ_CHG_TE] = {
295 [RK818_IRQ_CHG_TS1] = {
303 [RK818_IRQ_CHG_CVTLIM] = {
304 .mask = CHG_CVTLIM_MASK,
307 [RK818_IRQ_DISCHG_ILIM] = {
308 .mask = DISCHG_ILIM_MASK,
313 static struct regmap_irq_chip rk818_irq_chip = {
316 .num_irqs = ARRAY_SIZE(rk818_irqs),
319 .status_base = RK808_INT_STS_REG1,
320 .mask_base = RK808_INT_STS_MSK_REG1,
321 .ack_base = RK808_INT_STS_REG1,
322 .init_ack_masked = true,
325 static struct rk8xx_power_data rk808_power_data = {
327 .rk8xx_pre_init_reg = pre_init_reg,
328 .reg_num = ARRAY_SIZE(pre_init_reg),
329 .rk8xx_regmap_config = &rk808_regmap_config,
330 .rk8xx_cell = rk808s,
331 .cell_num = ARRAY_SIZE(rk808s),
332 .rk8xx_irq_chip = &rk808_irq_chip,
333 .pm_shutdown = rk808_shutdown,
336 static struct rk8xx_power_data rk818_power_data = {
338 .rk8xx_pre_init_reg = rk818_pre_init_reg,
339 .reg_num = ARRAY_SIZE(rk818_pre_init_reg),
340 .rk8xx_regmap_config = &rk818_regmap_config,
341 .rk8xx_cell = rk818s,
342 .cell_num = ARRAY_SIZE(rk818s),
343 .rk8xx_irq_chip = &rk818_irq_chip,
344 .pm_shutdown = rk818_shutdown,
347 static int (*pm_shutdown)(struct regmap *regmap);
348 static struct i2c_client *rk808_i2c_client;
350 static void rk808_device_shutdown(void)
353 struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
356 dev_warn(&rk808_i2c_client->dev,
357 "have no rk808, so do nothing here\n");
361 ret = pm_shutdown(rk808->regmap);
363 dev_err(&rk808_i2c_client->dev, "power off error!\n");
366 static const struct of_device_id rk808_of_match[] = {
368 .compatible = "rockchip,rk808",
369 .data = &rk808_power_data,
372 .compatible = "rockchip,rk818",
373 .data = &rk818_power_data,
377 MODULE_DEVICE_TABLE(of, rk808_of_match);
379 static int rk808_probe(struct i2c_client *client,
380 const struct i2c_device_id *id)
382 const struct of_device_id *of_id =
383 of_match_device(rk808_of_match, &client->dev);
384 const struct rk8xx_power_data *pdata = of_id->data;
385 struct device_node *np = client->dev.of_node;
390 int on_source, off_source;
393 dev_err(&client->dev, "Failed to find matching dt id\n");
398 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
402 rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
406 rk808->regmap = devm_regmap_init_i2c(client,
407 pdata->rk8xx_regmap_config);
408 if (IS_ERR(rk808->regmap)) {
409 dev_err(&client->dev, "regmap initialization failed\n");
410 return PTR_ERR(rk808->regmap);
413 pm_shutdown = pdata->pm_shutdown;
415 dev_err(&client->dev, "shutdown initialization failed\n");
419 if (strcmp(pdata->name, "rk818") == 0) {
420 ret = regmap_read(rk808->regmap, RK818_ON_SOURCE_REG, &on_source);
422 dev_err(&client->dev, "read reg:0x%x failed\n", RK818_ON_SOURCE_REG);
423 ret = regmap_read(rk808->regmap, RK818_OFF_SOURCE_REG, &off_source);
425 dev_err(&client->dev, "read reg:0x%x failed\n", RK818_OFF_SOURCE_REG);
426 dev_info(&client->dev, "ON_SOURCE:0x%02x OFF_SOURCE:0x%02x\n",
427 on_source, off_source);
430 for (i = 0; i < pdata->reg_num; i++) {
431 ret = regmap_update_bits(rk808->regmap,
432 pdata->rk8xx_pre_init_reg[i].addr,
433 pdata->rk8xx_pre_init_reg[i].mask,
434 pdata->rk8xx_pre_init_reg[i].value);
436 dev_err(&client->dev,
438 pdata->rk8xx_pre_init_reg[i].addr);
443 ret = regmap_add_irq_chip(rk808->regmap, client->irq,
445 pdata->rk8xx_irq_chip, &rk808->irq_data);
447 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
452 i2c_set_clientdata(client, rk808);
454 ret = mfd_add_devices(&client->dev, -1,
455 pdata->rk8xx_cell, pdata->cell_num,
456 NULL, 0, regmap_irq_get_domain(rk808->irq_data));
458 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
462 pm_off = of_property_read_bool(np,
463 "rockchip,system-power-controller");
465 rk808_i2c_client = client;
466 pm_power_off = rk808_device_shutdown;
472 regmap_del_irq_chip(client->irq, rk808->irq_data);
476 static int rk808_remove(struct i2c_client *client)
478 struct rk808 *rk808 = i2c_get_clientdata(client);
480 regmap_del_irq_chip(client->irq, rk808->irq_data);
481 mfd_remove_devices(&client->dev);
487 static const struct i2c_device_id rk808_ids[] = {
492 MODULE_DEVICE_TABLE(i2c, rk808_ids);
494 static struct i2c_driver rk808_i2c_driver = {
497 .of_match_table = rk808_of_match,
499 .probe = rk808_probe,
500 .remove = rk808_remove,
501 .id_table = rk808_ids,
504 module_i2c_driver(rk808_i2c_driver);
506 MODULE_LICENSE("GPL");
507 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
508 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
509 MODULE_DESCRIPTION("RK808 PMIC driver");