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 const struct regmap_config rk808_regmap_config = {
95 .max_register = RK808_IO_POL_REG,
96 .cache_type = REGCACHE_RBTREE,
97 .volatile_reg = rk808_is_volatile_reg,
100 static struct resource rtc_resources[] = {
102 .start = RK808_IRQ_RTC_ALARM,
103 .end = RK808_IRQ_RTC_ALARM,
104 .flags = IORESOURCE_IRQ,
108 static const struct mfd_cell rk808s[] = {
109 { .name = "rk808-clkout", },
110 { .name = "rk808-regulator", },
113 .num_resources = ARRAY_SIZE(rtc_resources),
114 .resources = &rtc_resources[0],
118 static const struct rk808_reg_data pre_init_reg[] = {
119 { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
120 { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
121 { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
122 { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA },
123 { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA },
124 { RK808_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
125 { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
129 static const struct regmap_irq rk808_irqs[] = {
131 [RK808_IRQ_VOUT_LO] = {
132 .mask = RK808_IRQ_VOUT_LO_MSK,
135 [RK808_IRQ_VB_LO] = {
136 .mask = RK808_IRQ_VB_LO_MSK,
139 [RK808_IRQ_PWRON] = {
140 .mask = RK808_IRQ_PWRON_MSK,
143 [RK808_IRQ_PWRON_LP] = {
144 .mask = RK808_IRQ_PWRON_LP_MSK,
147 [RK808_IRQ_HOTDIE] = {
148 .mask = RK808_IRQ_HOTDIE_MSK,
151 [RK808_IRQ_RTC_ALARM] = {
152 .mask = RK808_IRQ_RTC_ALARM_MSK,
155 [RK808_IRQ_RTC_PERIOD] = {
156 .mask = RK808_IRQ_RTC_PERIOD_MSK,
161 [RK808_IRQ_PLUG_IN_INT] = {
162 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
165 [RK808_IRQ_PLUG_OUT_INT] = {
166 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
171 static struct regmap_irq_chip rk808_irq_chip = {
174 .num_irqs = ARRAY_SIZE(rk808_irqs),
177 .status_base = RK808_INT_STS_REG1,
178 .mask_base = RK808_INT_STS_MSK_REG1,
179 .ack_base = RK808_INT_STS_REG1,
180 .init_ack_masked = true,
183 static const struct regmap_config rk818_regmap_config = {
186 .max_register = RK818_SAVE_DATA19,
187 .cache_type = REGCACHE_RBTREE,
188 .volatile_reg = rk808_is_volatile_reg,
191 static const struct mfd_cell rk818s[] = {
192 { .name = "rk808-clkout", },
193 { .name = "rk818-regulator", },
196 .num_resources = ARRAY_SIZE(rtc_resources),
197 .resources = &rtc_resources[0],
201 static const struct rk808_reg_data rk818_pre_init_reg[] = {
202 { RK818_H5V_EN_REG, REF_RDY_CTRL_ENABLE | H5V_EN_MASK,
203 REF_RDY_CTRL_ENABLE | H5V_EN_ENABLE },
204 { RK818_DCDC_EN_REG, BOOST_EN_MASK | SWITCH_EN_MASK,
205 BOOST_EN_ENABLE | SWITCH_EN_ENABLE },
206 { RK818_SLEEP_SET_OFF_REG1, OTG_SLP_SET_MASK, OTG_SLP_SET_OFF },
207 { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA },
210 static const struct regmap_irq rk818_irqs[] = {
212 [RK818_IRQ_VOUT_LO] = {
213 .mask = VOUT_LO_MASK,
216 [RK818_IRQ_VB_LO] = {
220 [RK818_IRQ_PWRON] = {
224 [RK818_IRQ_PWRON_LP] = {
225 .mask = PWRON_LP_MASK,
228 [RK818_IRQ_HOTDIE] = {
232 [RK818_IRQ_RTC_ALARM] = {
233 .mask = RTC_ALARM_MASK,
236 [RK818_IRQ_RTC_PERIOD] = {
237 .mask = RTC_PERIOD_MASK,
240 [RK818_IRQ_USB_OV] = {
245 [RK818_IRQ_PLUG_IN] = {
246 .mask = PLUG_IN_MASK,
249 [RK818_IRQ_PLUG_OUT] = {
250 .mask = PLUG_OUT_MASK,
253 [RK818_IRQ_CHG_OK] = {
257 [RK818_IRQ_CHG_TE] = {
261 [RK818_IRQ_CHG_TS1] = {
269 [RK818_IRQ_DISCHG_ILIM] = {
270 .mask = DISCHG_ILIM_MASK,
275 static struct regmap_irq_chip rk818_irq_chip = {
278 .num_irqs = ARRAY_SIZE(rk818_irqs),
281 .status_base = RK808_INT_STS_REG1,
282 .mask_base = RK808_INT_STS_MSK_REG1,
283 .ack_base = RK808_INT_STS_REG1,
284 .init_ack_masked = true,
287 static struct rk8xx_power_data rk808_power_data = {
289 .rk8xx_pre_init_reg = pre_init_reg,
290 .reg_num = ARRAY_SIZE(pre_init_reg),
291 .rk8xx_regmap_config = &rk808_regmap_config,
292 .rk8xx_cell = rk808s,
293 .cell_num = ARRAY_SIZE(rk808s),
294 .rk8xx_irq_chip = &rk808_irq_chip,
295 .pm_shutdown = rk808_shutdown,
298 static struct rk8xx_power_data rk818_power_data = {
300 .rk8xx_pre_init_reg = rk818_pre_init_reg,
301 .reg_num = ARRAY_SIZE(rk818_pre_init_reg),
302 .rk8xx_regmap_config = &rk818_regmap_config,
303 .rk8xx_cell = rk818s,
304 .cell_num = ARRAY_SIZE(rk818s),
305 .rk8xx_irq_chip = &rk818_irq_chip,
306 .pm_shutdown = rk818_shutdown,
309 static int (*pm_shutdown)(struct regmap *regmap);
310 static struct i2c_client *rk808_i2c_client;
312 static void rk808_device_shutdown(void)
315 struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
318 dev_warn(&rk808_i2c_client->dev,
319 "have no rk808, so do nothing here\n");
323 ret = pm_shutdown(rk808->regmap);
325 dev_err(&rk808_i2c_client->dev, "power off error!\n");
328 static const struct of_device_id rk808_of_match[] = {
330 .compatible = "rockchip,rk808",
331 .data = &rk808_power_data,
334 .compatible = "rockchip,rk818",
335 .data = &rk818_power_data,
339 MODULE_DEVICE_TABLE(of, rk808_of_match);
341 static int rk808_probe(struct i2c_client *client,
342 const struct i2c_device_id *id)
344 const struct of_device_id *of_id =
345 of_match_device(rk808_of_match, &client->dev);
346 const struct rk8xx_power_data *pdata = of_id->data;
347 struct device_node *np = client->dev.of_node;
354 dev_err(&client->dev, "Failed to find matching dt id\n");
359 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
363 rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
367 rk808->regmap = devm_regmap_init_i2c(client,
368 pdata->rk8xx_regmap_config);
369 if (IS_ERR(rk808->regmap)) {
370 dev_err(&client->dev, "regmap initialization failed\n");
371 return PTR_ERR(rk808->regmap);
374 pm_shutdown = pdata->pm_shutdown;
376 dev_err(&client->dev, "shutdown initialization failed\n");
380 for (i = 0; i < pdata->reg_num; i++) {
381 ret = regmap_update_bits(rk808->regmap,
382 pdata->rk8xx_pre_init_reg[i].addr,
383 pdata->rk8xx_pre_init_reg[i].mask,
384 pdata->rk8xx_pre_init_reg[i].value);
386 dev_err(&client->dev,
388 pdata->rk8xx_pre_init_reg[i].addr);
393 ret = regmap_add_irq_chip(rk808->regmap, client->irq,
395 pdata->rk8xx_irq_chip, &rk808->irq_data);
397 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
402 i2c_set_clientdata(client, rk808);
404 ret = mfd_add_devices(&client->dev, -1,
405 pdata->rk8xx_cell, pdata->cell_num,
406 NULL, 0, regmap_irq_get_domain(rk808->irq_data));
408 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
412 pm_off = of_property_read_bool(np,
413 "rockchip,system-power-controller");
415 rk808_i2c_client = client;
416 pm_power_off = rk808_device_shutdown;
422 regmap_del_irq_chip(client->irq, rk808->irq_data);
426 static int rk808_remove(struct i2c_client *client)
428 struct rk808 *rk808 = i2c_get_clientdata(client);
430 regmap_del_irq_chip(client->irq, rk808->irq_data);
431 mfd_remove_devices(&client->dev);
437 static const struct i2c_device_id rk808_ids[] = {
442 MODULE_DEVICE_TABLE(i2c, rk808_ids);
444 static struct i2c_driver rk808_i2c_driver = {
447 .of_match_table = rk808_of_match,
449 .probe = rk808_probe,
450 .remove = rk808_remove,
451 .id_table = rk808_ids,
454 module_i2c_driver(rk808_i2c_driver);
456 MODULE_LICENSE("GPL");
457 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
458 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
459 MODULE_DESCRIPTION("RK808 PMIC driver");