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11#include <linux/interrupt.h>
12#include <linux/irq.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/err.h>
16#include <linux/slab.h>
17#include <linux/i2c.h>
18#include <linux/mfd/core.h>
19#include <linux/mfd/rc5t583.h>
20#include <linux/regmap.h>
21
22#define RICOH_ONOFFSEL_REG 0x10
23#define RICOH_SWCTL_REG 0x5E
24
25struct deepsleep_control_data {
26 u8 reg_add;
27 u8 ds_pos_bit;
28};
29
30#define DEEPSLEEP_INIT(_id, _reg, _pos) \
31 { \
32 .reg_add = RC5T583_##_reg, \
33 .ds_pos_bit = _pos, \
34 }
35
36static struct deepsleep_control_data deepsleep_data[] = {
37 DEEPSLEEP_INIT(DC0, SLPSEQ1, 0),
38 DEEPSLEEP_INIT(DC1, SLPSEQ1, 4),
39 DEEPSLEEP_INIT(DC2, SLPSEQ2, 0),
40 DEEPSLEEP_INIT(DC3, SLPSEQ2, 4),
41 DEEPSLEEP_INIT(LDO0, SLPSEQ3, 0),
42 DEEPSLEEP_INIT(LDO1, SLPSEQ3, 4),
43 DEEPSLEEP_INIT(LDO2, SLPSEQ4, 0),
44 DEEPSLEEP_INIT(LDO3, SLPSEQ4, 4),
45 DEEPSLEEP_INIT(LDO4, SLPSEQ5, 0),
46 DEEPSLEEP_INIT(LDO5, SLPSEQ5, 4),
47 DEEPSLEEP_INIT(LDO6, SLPSEQ6, 0),
48 DEEPSLEEP_INIT(LDO7, SLPSEQ6, 4),
49 DEEPSLEEP_INIT(LDO8, SLPSEQ7, 0),
50 DEEPSLEEP_INIT(LDO9, SLPSEQ7, 4),
51 DEEPSLEEP_INIT(PSO0, SLPSEQ8, 0),
52 DEEPSLEEP_INIT(PSO1, SLPSEQ8, 4),
53 DEEPSLEEP_INIT(PSO2, SLPSEQ9, 0),
54 DEEPSLEEP_INIT(PSO3, SLPSEQ9, 4),
55 DEEPSLEEP_INIT(PSO4, SLPSEQ10, 0),
56 DEEPSLEEP_INIT(PSO5, SLPSEQ10, 4),
57 DEEPSLEEP_INIT(PSO6, SLPSEQ11, 0),
58 DEEPSLEEP_INIT(PSO7, SLPSEQ11, 4),
59};
60
61#define EXT_PWR_REQ \
62 (RC5T583_EXT_PWRREQ1_CONTROL | RC5T583_EXT_PWRREQ2_CONTROL)
63
64static const struct mfd_cell rc5t583_subdevs[] = {
65 {.name = "rc5t583-gpio",},
66 {.name = "rc5t583-regulator",},
67 {.name = "rc5t583-rtc", },
68 {.name = "rc5t583-key", }
69};
70
71static int __rc5t583_set_ext_pwrreq1_control(struct device *dev,
72 int id, int ext_pwr, int slots)
73{
74 int ret;
75 uint8_t sleepseq_val = 0;
76 unsigned int en_bit;
77 unsigned int slot_bit;
78
79 if (id == RC5T583_DS_DC0) {
80 dev_err(dev, "PWRREQ1 is invalid control for rail %d\n", id);
81 return -EINVAL;
82 }
83
84 en_bit = deepsleep_data[id].ds_pos_bit;
85 slot_bit = en_bit + 1;
86 ret = rc5t583_read(dev, deepsleep_data[id].reg_add, &sleepseq_val);
87 if (ret < 0) {
88 dev_err(dev, "Error in reading reg 0x%x\n",
89 deepsleep_data[id].reg_add);
90 return ret;
91 }
92
93 sleepseq_val &= ~(0xF << en_bit);
94 sleepseq_val |= BIT(en_bit);
95 sleepseq_val |= ((slots & 0x7) << slot_bit);
96 ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(1));
97 if (ret < 0) {
98 dev_err(dev, "Error in updating the 0x%02x register\n",
99 RICOH_ONOFFSEL_REG);
100 return ret;
101 }
102
103 ret = rc5t583_write(dev, deepsleep_data[id].reg_add, sleepseq_val);
104 if (ret < 0) {
105 dev_err(dev, "Error in writing reg 0x%x\n",
106 deepsleep_data[id].reg_add);
107 return ret;
108 }
109
110 if (id == RC5T583_DS_LDO4) {
111 ret = rc5t583_write(dev, RICOH_SWCTL_REG, 0x1);
112 if (ret < 0)
113 dev_err(dev, "Error in writing reg 0x%x\n",
114 RICOH_SWCTL_REG);
115 }
116 return ret;
117}
118
119static int __rc5t583_set_ext_pwrreq2_control(struct device *dev,
120 int id, int ext_pwr)
121{
122 int ret;
123
124 if (id != RC5T583_DS_DC0) {
125 dev_err(dev, "PWRREQ2 is invalid control for rail %d\n", id);
126 return -EINVAL;
127 }
128
129 ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(2));
130 if (ret < 0)
131 dev_err(dev, "Error in updating the ONOFFSEL 0x10 register\n");
132 return ret;
133}
134
135int rc5t583_ext_power_req_config(struct device *dev, int ds_id,
136 int ext_pwr_req, int deepsleep_slot_nr)
137{
138 if ((ext_pwr_req & EXT_PWR_REQ) == EXT_PWR_REQ)
139 return -EINVAL;
140
141 if (ext_pwr_req & RC5T583_EXT_PWRREQ1_CONTROL)
142 return __rc5t583_set_ext_pwrreq1_control(dev, ds_id,
143 ext_pwr_req, deepsleep_slot_nr);
144
145 if (ext_pwr_req & RC5T583_EXT_PWRREQ2_CONTROL)
146 return __rc5t583_set_ext_pwrreq2_control(dev,
147 ds_id, ext_pwr_req);
148 return 0;
149}
150EXPORT_SYMBOL(rc5t583_ext_power_req_config);
151
152static int rc5t583_clear_ext_power_req(struct rc5t583 *rc5t583,
153 struct rc5t583_platform_data *pdata)
154{
155 int ret;
156 int i;
157 uint8_t on_off_val = 0;
158
159
160 if (pdata->enable_shutdown)
161 on_off_val = 0x1;
162
163 ret = rc5t583_write(rc5t583->dev, RICOH_ONOFFSEL_REG, on_off_val);
164 if (ret < 0)
165 dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n",
166 RICOH_ONOFFSEL_REG, ret);
167
168 ret = rc5t583_write(rc5t583->dev, RICOH_SWCTL_REG, 0x0);
169 if (ret < 0)
170 dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n",
171 RICOH_SWCTL_REG, ret);
172
173
174 for (i = RC5T583_SLPSEQ1; i <= RC5T583_SLPSEQ11; ++i) {
175 ret = rc5t583_write(rc5t583->dev, i, 0x0);
176 if (ret < 0)
177 dev_warn(rc5t583->dev,
178 "Error in writing reg 0x%02x error: %d\n",
179 i, ret);
180 }
181 return 0;
182}
183
184static bool volatile_reg(struct device *dev, unsigned int reg)
185{
186
187 switch (reg) {
188 case RC5T583_INT_EN_SYS1:
189 case RC5T583_INT_EN_SYS2:
190 case RC5T583_INT_EN_DCDC:
191 case RC5T583_INT_EN_RTC:
192 case RC5T583_INT_EN_ADC1:
193 case RC5T583_INT_EN_ADC2:
194 case RC5T583_INT_EN_ADC3:
195 case RC5T583_GPIO_GPEDGE1:
196 case RC5T583_GPIO_GPEDGE2:
197 case RC5T583_GPIO_EN_INT:
198 return false;
199
200 case RC5T583_GPIO_MON_IOIN:
201
202 return true;
203
204 default:
205
206 if ((reg >= RC5T583_GPIO_IOSEL) &&
207 (reg <= RC5T583_GPIO_GPOFUNC))
208 return false;
209
210
211 if ((reg >= RC5T583_SLPSEQ1) && (reg <= RC5T583_SLPSEQ11))
212 return false;
213
214
215 if ((reg >= RC5T583_REG_DC0CTL) && (reg <= RC5T583_REG_SR3CTL))
216 return false;
217 if ((reg >= RC5T583_REG_LDOEN1) &&
218 (reg <= RC5T583_REG_LDO9DAC_DS))
219 return false;
220
221 break;
222 }
223
224 return true;
225}
226
227static const struct regmap_config rc5t583_regmap_config = {
228 .reg_bits = 8,
229 .val_bits = 8,
230 .volatile_reg = volatile_reg,
231 .max_register = RC5T583_MAX_REG,
232 .num_reg_defaults_raw = RC5T583_NUM_REGS,
233 .cache_type = REGCACHE_RBTREE,
234};
235
236static int rc5t583_i2c_probe(struct i2c_client *i2c,
237 const struct i2c_device_id *id)
238{
239 struct rc5t583 *rc5t583;
240 struct rc5t583_platform_data *pdata = dev_get_platdata(&i2c->dev);
241 int ret;
242
243 if (!pdata) {
244 dev_err(&i2c->dev, "Err: Platform data not found\n");
245 return -EINVAL;
246 }
247
248 rc5t583 = devm_kzalloc(&i2c->dev, sizeof(*rc5t583), GFP_KERNEL);
249 if (!rc5t583)
250 return -ENOMEM;
251
252 rc5t583->dev = &i2c->dev;
253 i2c_set_clientdata(i2c, rc5t583);
254
255 rc5t583->regmap = devm_regmap_init_i2c(i2c, &rc5t583_regmap_config);
256 if (IS_ERR(rc5t583->regmap)) {
257 ret = PTR_ERR(rc5t583->regmap);
258 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
259 return ret;
260 }
261
262 ret = rc5t583_clear_ext_power_req(rc5t583, pdata);
263 if (ret < 0)
264 return ret;
265
266 if (i2c->irq) {
267 ret = rc5t583_irq_init(rc5t583, i2c->irq, pdata->irq_base);
268
269 if (ret)
270 dev_warn(&i2c->dev, "IRQ init failed: %d\n", ret);
271 }
272
273 ret = devm_mfd_add_devices(rc5t583->dev, -1, rc5t583_subdevs,
274 ARRAY_SIZE(rc5t583_subdevs), NULL, 0, NULL);
275 if (ret) {
276 dev_err(&i2c->dev, "add mfd devices failed: %d\n", ret);
277 return ret;
278 }
279
280 return 0;
281}
282
283static const struct i2c_device_id rc5t583_i2c_id[] = {
284 {.name = "rc5t583", .driver_data = 0},
285 {}
286};
287
288static struct i2c_driver rc5t583_i2c_driver = {
289 .driver = {
290 .name = "rc5t583",
291 },
292 .probe = rc5t583_i2c_probe,
293 .id_table = rc5t583_i2c_id,
294};
295
296static int __init rc5t583_i2c_init(void)
297{
298 return i2c_add_driver(&rc5t583_i2c_driver);
299}
300subsys_initcall(rc5t583_i2c_init);
301
