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1 | /* |
2 | * MFD core driver for Rockchip RK808 | |
3 | * | |
4 | * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd | |
5 | * | |
6 | * Author: Chris Zhong <zyw@rock-chips.com> | |
7 | * Author: Zhang Qing <zhangqing@rock-chips.com> | |
8 | * | |
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. | |
12 | * | |
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 | |
16 | * more details. | |
17 | */ | |
18 | ||
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 | ||
26 | struct rk808_reg_data { | |
27 | int addr; | |
28 | int mask; | |
29 | int value; | |
30 | }; | |
31 | ||
32 | static const struct regmap_config rk808_regmap_config = { | |
33 | .reg_bits = 8, | |
34 | .val_bits = 8, | |
35 | .max_register = RK808_IO_POL_REG, | |
36 | }; | |
37 | ||
38 | static struct resource rtc_resources[] = { | |
39 | { | |
40 | .start = RK808_IRQ_RTC_ALARM, | |
41 | .end = RK808_IRQ_RTC_ALARM, | |
42 | .flags = IORESOURCE_IRQ, | |
43 | } | |
44 | }; | |
45 | ||
46 | static const struct mfd_cell rk808s[] = { | |
47 | { .name = "rk808-clkout", }, | |
48 | { .name = "rk808-regulator", }, | |
49 | { | |
50 | .name = "rk808-rtc", | |
51 | .num_resources = ARRAY_SIZE(rtc_resources), | |
52 | .resources = &rtc_resources[0], | |
53 | }, | |
54 | }; | |
55 | ||
56 | static const struct rk808_reg_data pre_init_reg[] = { | |
57 | { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA }, | |
58 | { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA }, | |
59 | { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA }, | |
60 | { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA }, | |
61 | { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA }, | |
62 | { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT | | |
63 | VB_LO_SEL_3500MV }, | |
64 | }; | |
65 | ||
66 | static const struct regmap_irq rk808_irqs[] = { | |
67 | /* INT_STS */ | |
68 | [RK808_IRQ_VOUT_LO] = { | |
69 | .mask = RK808_IRQ_VOUT_LO_MSK, | |
70 | .reg_offset = 0, | |
71 | }, | |
72 | [RK808_IRQ_VB_LO] = { | |
73 | .mask = RK808_IRQ_VB_LO_MSK, | |
74 | .reg_offset = 0, | |
75 | }, | |
76 | [RK808_IRQ_PWRON] = { | |
77 | .mask = RK808_IRQ_PWRON_MSK, | |
78 | .reg_offset = 0, | |
79 | }, | |
80 | [RK808_IRQ_PWRON_LP] = { | |
81 | .mask = RK808_IRQ_PWRON_LP_MSK, | |
82 | .reg_offset = 0, | |
83 | }, | |
84 | [RK808_IRQ_HOTDIE] = { | |
85 | .mask = RK808_IRQ_HOTDIE_MSK, | |
86 | .reg_offset = 0, | |
87 | }, | |
88 | [RK808_IRQ_RTC_ALARM] = { | |
89 | .mask = RK808_IRQ_RTC_ALARM_MSK, | |
90 | .reg_offset = 0, | |
91 | }, | |
92 | [RK808_IRQ_RTC_PERIOD] = { | |
93 | .mask = RK808_IRQ_RTC_PERIOD_MSK, | |
94 | .reg_offset = 0, | |
95 | }, | |
96 | ||
97 | /* INT_STS2 */ | |
98 | [RK808_IRQ_PLUG_IN_INT] = { | |
99 | .mask = RK808_IRQ_PLUG_IN_INT_MSK, | |
100 | .reg_offset = 1, | |
101 | }, | |
102 | [RK808_IRQ_PLUG_OUT_INT] = { | |
103 | .mask = RK808_IRQ_PLUG_OUT_INT_MSK, | |
104 | .reg_offset = 1, | |
105 | }, | |
106 | }; | |
107 | ||
108 | static struct regmap_irq_chip rk808_irq_chip = { | |
109 | .name = "rk808", | |
110 | .irqs = rk808_irqs, | |
111 | .num_irqs = ARRAY_SIZE(rk808_irqs), | |
112 | .num_regs = 2, | |
113 | .irq_reg_stride = 2, | |
114 | .status_base = RK808_INT_STS_REG1, | |
115 | .mask_base = RK808_INT_STS_MSK_REG1, | |
116 | .ack_base = RK808_INT_STS_REG1, | |
117 | .init_ack_masked = true, | |
118 | }; | |
119 | ||
120 | static struct i2c_client *rk808_i2c_client; | |
121 | static void rk808_device_shutdown(void) | |
122 | { | |
123 | int ret; | |
124 | struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); | |
125 | ||
126 | if (!rk808) { | |
127 | dev_warn(&rk808_i2c_client->dev, | |
128 | "have no rk808, so do nothing here\n"); | |
129 | return; | |
130 | } | |
131 | ||
132 | ret = regmap_update_bits(rk808->regmap, | |
133 | RK808_DEVCTRL_REG, | |
134 | DEV_OFF_RST, DEV_OFF_RST); | |
135 | if (ret) | |
136 | dev_err(&rk808_i2c_client->dev, "power off error!\n"); | |
137 | } | |
138 | ||
139 | static int rk808_probe(struct i2c_client *client, | |
140 | const struct i2c_device_id *id) | |
141 | { | |
142 | struct device_node *np = client->dev.of_node; | |
143 | struct rk808 *rk808; | |
144 | int pm_off = 0; | |
145 | int ret; | |
146 | int i; | |
147 | ||
148 | if (!client->irq) { | |
149 | dev_err(&client->dev, "No interrupt support, no core IRQ\n"); | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
153 | rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL); | |
154 | if (!rk808) | |
155 | return -ENOMEM; | |
156 | ||
157 | rk808->regmap = devm_regmap_init_i2c(client, &rk808_regmap_config); | |
158 | if (IS_ERR(rk808->regmap)) { | |
159 | dev_err(&client->dev, "regmap initialization failed\n"); | |
160 | return PTR_ERR(rk808->regmap); | |
161 | } | |
162 | ||
163 | for (i = 0; i < ARRAY_SIZE(pre_init_reg); i++) { | |
164 | ret = regmap_update_bits(rk808->regmap, pre_init_reg[i].addr, | |
165 | pre_init_reg[i].mask, | |
166 | pre_init_reg[i].value); | |
167 | if (ret) { | |
168 | dev_err(&client->dev, | |
169 | "0x%x write err\n", pre_init_reg[i].addr); | |
170 | return ret; | |
171 | } | |
172 | } | |
173 | ||
174 | ret = regmap_add_irq_chip(rk808->regmap, client->irq, | |
175 | IRQF_ONESHOT, -1, | |
176 | &rk808_irq_chip, &rk808->irq_data); | |
177 | if (ret) { | |
178 | dev_err(&client->dev, "Failed to add irq_chip %d\n", ret); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | rk808->i2c = client; | |
183 | i2c_set_clientdata(client, rk808); | |
184 | ||
185 | ret = mfd_add_devices(&client->dev, -1, | |
186 | rk808s, ARRAY_SIZE(rk808s), | |
187 | NULL, 0, regmap_irq_get_domain(rk808->irq_data)); | |
188 | if (ret) { | |
189 | dev_err(&client->dev, "failed to add MFD devices %d\n", ret); | |
190 | goto err_irq; | |
191 | } | |
192 | ||
193 | pm_off = of_property_read_bool(np, | |
194 | "rockchip,system-power-controller"); | |
195 | if (pm_off && !pm_power_off) { | |
196 | rk808_i2c_client = client; | |
197 | pm_power_off = rk808_device_shutdown; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | ||
202 | err_irq: | |
203 | regmap_del_irq_chip(client->irq, rk808->irq_data); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | static int rk808_remove(struct i2c_client *client) | |
208 | { | |
209 | struct rk808 *rk808 = i2c_get_clientdata(client); | |
210 | ||
211 | regmap_del_irq_chip(client->irq, rk808->irq_data); | |
212 | mfd_remove_devices(&client->dev); | |
213 | pm_power_off = NULL; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static struct of_device_id rk808_of_match[] = { | |
219 | { .compatible = "rockchip,rk808" }, | |
220 | { }, | |
221 | }; | |
222 | MODULE_DEVICE_TABLE(of, rk808_of_match); | |
223 | ||
224 | static const struct i2c_device_id rk808_ids[] = { | |
225 | { "rk808" }, | |
226 | { }, | |
227 | }; | |
228 | MODULE_DEVICE_TABLE(i2c, rk808_ids); | |
229 | ||
230 | static struct i2c_driver rk808_i2c_driver = { | |
231 | .driver = { | |
232 | .name = "rk808", | |
233 | .of_match_table = rk808_of_match, | |
234 | }, | |
235 | .probe = rk808_probe, | |
236 | .remove = rk808_remove, | |
237 | .id_table = rk808_ids, | |
238 | }; | |
239 | ||
240 | module_i2c_driver(rk808_i2c_driver); | |
241 | ||
242 | MODULE_LICENSE("GPL"); | |
243 | MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); | |
244 | MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>"); | |
245 | MODULE_DESCRIPTION("RK808 PMIC driver"); |