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;
43 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
47 * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
48 * we don't use that feature. It's better to cache.
49 * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
50 * bits are cleared in case when we shutoff anyway, but better safe.
54 case RK808_SECONDS_REG ... RK808_WEEKS_REG:
55 case RK808_RTC_STATUS_REG:
56 case RK808_VB_MON_REG:
57 case RK808_THERMAL_REG:
58 case RK808_DCDC_UV_STS_REG:
59 case RK808_LDO_UV_STS_REG:
60 case RK808_DCDC_PG_REG:
61 case RK808_LDO_PG_REG:
62 case RK808_DEVCTRL_REG:
63 case RK808_INT_STS_REG1:
64 case RK808_INT_STS_REG2:
71 static const struct regmap_config rk808_regmap_config = {
74 .max_register = RK808_IO_POL_REG,
75 .cache_type = REGCACHE_RBTREE,
76 .volatile_reg = rk808_is_volatile_reg,
79 static struct resource rtc_resources[] = {
81 .start = RK808_IRQ_RTC_ALARM,
82 .end = RK808_IRQ_RTC_ALARM,
83 .flags = IORESOURCE_IRQ,
87 static const struct mfd_cell rk808s[] = {
88 { .name = "rk808-clkout", },
89 { .name = "rk808-regulator", },
92 .num_resources = ARRAY_SIZE(rtc_resources),
93 .resources = &rtc_resources[0],
97 static const struct rk808_reg_data pre_init_reg[] = {
98 { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
99 { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
100 { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
101 { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA },
102 { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA },
103 { RK808_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
104 { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
108 static const struct regmap_irq rk808_irqs[] = {
110 [RK808_IRQ_VOUT_LO] = {
111 .mask = RK808_IRQ_VOUT_LO_MSK,
114 [RK808_IRQ_VB_LO] = {
115 .mask = RK808_IRQ_VB_LO_MSK,
118 [RK808_IRQ_PWRON] = {
119 .mask = RK808_IRQ_PWRON_MSK,
122 [RK808_IRQ_PWRON_LP] = {
123 .mask = RK808_IRQ_PWRON_LP_MSK,
126 [RK808_IRQ_HOTDIE] = {
127 .mask = RK808_IRQ_HOTDIE_MSK,
130 [RK808_IRQ_RTC_ALARM] = {
131 .mask = RK808_IRQ_RTC_ALARM_MSK,
134 [RK808_IRQ_RTC_PERIOD] = {
135 .mask = RK808_IRQ_RTC_PERIOD_MSK,
140 [RK808_IRQ_PLUG_IN_INT] = {
141 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
144 [RK808_IRQ_PLUG_OUT_INT] = {
145 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
150 static struct regmap_irq_chip rk808_irq_chip = {
153 .num_irqs = ARRAY_SIZE(rk808_irqs),
156 .status_base = RK808_INT_STS_REG1,
157 .mask_base = RK808_INT_STS_MSK_REG1,
158 .ack_base = RK808_INT_STS_REG1,
159 .init_ack_masked = true,
162 static const struct regmap_config rk818_regmap_config = {
165 .max_register = RK818_SAVE_DATA19,
166 .cache_type = REGCACHE_RBTREE,
167 .volatile_reg = rk808_is_volatile_reg,
170 static const struct mfd_cell rk818s[] = {
171 { .name = "rk808-clkout", },
172 { .name = "rk818-regulator", },
175 .num_resources = ARRAY_SIZE(rtc_resources),
176 .resources = &rtc_resources[0],
180 static const struct rk808_reg_data rk818_pre_init_reg[] = {
181 { RK818_H5V_EN_REG, REF_RDY_CTRL_ENABLE | H5V_EN_MASK,
182 REF_RDY_CTRL_ENABLE | H5V_EN_ENABLE },
183 { RK818_DCDC_EN_REG, BOOST_EN_MASK | SWITCH_EN_MASK,
184 BOOST_EN_ENABLE | SWITCH_EN_ENABLE },
185 { RK818_SLEEP_SET_OFF_REG1, OTG_SLP_SET_MASK, OTG_SLP_SET_OFF },
186 { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA },
189 static const struct regmap_irq rk818_irqs[] = {
191 [RK818_IRQ_VOUT_LO] = {
192 .mask = VOUT_LO_MASK,
195 [RK818_IRQ_VB_LO] = {
199 [RK818_IRQ_PWRON] = {
203 [RK818_IRQ_PWRON_LP] = {
204 .mask = PWRON_LP_MASK,
207 [RK818_IRQ_HOTDIE] = {
211 [RK818_IRQ_RTC_ALARM] = {
212 .mask = RTC_ALARM_MASK,
215 [RK818_IRQ_RTC_PERIOD] = {
216 .mask = RTC_PERIOD_MASK,
219 [RK818_IRQ_USB_OV] = {
224 [RK818_IRQ_PLUG_IN] = {
225 .mask = PLUG_IN_MASK,
228 [RK818_IRQ_PLUG_OUT] = {
229 .mask = PLUG_OUT_MASK,
232 [RK818_IRQ_CHG_OK] = {
236 [RK818_IRQ_CHG_TE] = {
240 [RK818_IRQ_CHG_TS1] = {
248 [RK818_IRQ_DISCHG_ILIM] = {
249 .mask = DISCHG_ILIM_MASK,
254 static struct regmap_irq_chip rk818_irq_chip = {
257 .num_irqs = ARRAY_SIZE(rk818_irqs),
260 .status_base = RK808_INT_STS_REG1,
261 .mask_base = RK808_INT_STS_MSK_REG1,
262 .ack_base = RK808_INT_STS_REG1,
263 .init_ack_masked = true,
266 static struct rk8xx_power_data rk808_power_data = {
268 .rk8xx_pre_init_reg = pre_init_reg,
269 .reg_num = ARRAY_SIZE(pre_init_reg),
270 .rk8xx_regmap_config = &rk808_regmap_config,
271 .rk8xx_cell = rk808s,
272 .cell_num = ARRAY_SIZE(rk808s),
273 .rk8xx_irq_chip = &rk808_irq_chip,
276 static struct rk8xx_power_data rk818_power_data = {
278 .rk8xx_pre_init_reg = rk818_pre_init_reg,
279 .reg_num = ARRAY_SIZE(rk818_pre_init_reg),
280 .rk8xx_regmap_config = &rk818_regmap_config,
281 .rk8xx_cell = rk818s,
282 .cell_num = ARRAY_SIZE(rk818s),
283 .rk8xx_irq_chip = &rk818_irq_chip,
286 static struct i2c_client *rk808_i2c_client;
287 static void rk808_device_shutdown(void)
290 struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
293 dev_warn(&rk808_i2c_client->dev,
294 "have no rk808, so do nothing here\n");
298 ret = regmap_update_bits(rk808->regmap,
300 DEV_OFF_RST, DEV_OFF_RST);
302 dev_err(&rk808_i2c_client->dev, "power off error!\n");
305 static const struct of_device_id rk808_of_match[] = {
307 .compatible = "rockchip,rk808",
308 .data = &rk808_power_data,
311 .compatible = "rockchip,rk818",
312 .data = &rk818_power_data,
316 MODULE_DEVICE_TABLE(of, rk808_of_match);
318 static int rk808_probe(struct i2c_client *client,
319 const struct i2c_device_id *id)
321 const struct of_device_id *of_id =
322 of_match_device(rk808_of_match, &client->dev);
323 const struct rk8xx_power_data *pdata = of_id->data;
324 struct device_node *np = client->dev.of_node;
331 dev_err(&client->dev, "Failed to find matching dt id\n");
336 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
340 rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
344 rk808->regmap = devm_regmap_init_i2c(client,
345 pdata->rk8xx_regmap_config);
346 if (IS_ERR(rk808->regmap)) {
347 dev_err(&client->dev, "regmap initialization failed\n");
348 return PTR_ERR(rk808->regmap);
351 for (i = 0; i < pdata->reg_num; i++) {
352 ret = regmap_update_bits(rk808->regmap,
353 pdata->rk8xx_pre_init_reg[i].addr,
354 pdata->rk8xx_pre_init_reg[i].mask,
355 pdata->rk8xx_pre_init_reg[i].value);
357 dev_err(&client->dev,
359 pdata->rk8xx_pre_init_reg[i].addr);
364 ret = regmap_add_irq_chip(rk808->regmap, client->irq,
366 pdata->rk8xx_irq_chip, &rk808->irq_data);
368 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
373 i2c_set_clientdata(client, rk808);
375 ret = mfd_add_devices(&client->dev, -1,
376 pdata->rk8xx_cell, pdata->cell_num,
377 NULL, 0, regmap_irq_get_domain(rk808->irq_data));
379 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
383 pm_off = of_property_read_bool(np,
384 "rockchip,system-power-controller");
385 if (pm_off && !pm_power_off) {
386 rk808_i2c_client = client;
387 pm_power_off = rk808_device_shutdown;
393 regmap_del_irq_chip(client->irq, rk808->irq_data);
397 static int rk808_remove(struct i2c_client *client)
399 struct rk808 *rk808 = i2c_get_clientdata(client);
401 regmap_del_irq_chip(client->irq, rk808->irq_data);
402 mfd_remove_devices(&client->dev);
408 static const struct i2c_device_id rk808_ids[] = {
413 MODULE_DEVICE_TABLE(i2c, rk808_ids);
415 static struct i2c_driver rk808_i2c_driver = {
418 .of_match_table = rk808_of_match,
420 .probe = rk808_probe,
421 .remove = rk808_remove,
422 .id_table = rk808_ids,
425 module_i2c_driver(rk808_i2c_driver);
427 MODULE_LICENSE("GPL");
428 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
429 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
430 MODULE_DESCRIPTION("RK808 PMIC driver");