1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright (C) 2019 ROHM Semiconductors
4 //
5 // ROHM BD71828 PMIC driver
6
7 #include <linux/gpio_keys.h>
8 #include <linux/i2c.h>
9 #include <linux/input.h>
10 #include <linux/interrupt.h>
11 #include <linux/ioport.h>
12 #include <linux/irq.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/rohm-bd71828.h>
15 #include <linux/module.h>
16 #include <linux/of_device.h>
17 #include <linux/regmap.h>
18 #include <linux/types.h>
19
20 static struct gpio_keys_button button = {
21 .code = KEY_POWER,
22 .gpio = -1,
23 .type = EV_KEY,
24 };
25
26 static struct gpio_keys_platform_data bd71828_powerkey_data = {
27 .buttons = &button,
28 .nbuttons = 1,
29 .name = "bd71828-pwrkey",
30 };
31
32 static const struct resource rtc_irqs[] = {
33 DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC0, "bd71828-rtc-alm-0"),
34 DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC1, "bd71828-rtc-alm-1"),
35 DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC2, "bd71828-rtc-alm-2"),
36 };
37
38 static struct mfd_cell bd71828_mfd_cells[] = {
39 { .name = "bd71828-pmic", },
40 { .name = "bd71828-gpio", },
41 { .name = "bd71828-led", .of_compatible = "rohm,bd71828-leds" },
42 /*
43 * We use BD71837 driver to drive the clock block. Only differences to
44 * BD70528 clock gate are the register address and mask.
45 */
46 { .name = "bd71828-clk", },
47 { .name = "bd71827-power", },
48 {
49 .name = "bd71828-rtc",
50 .resources = rtc_irqs,
51 .num_resources = ARRAY_SIZE(rtc_irqs),
52 }, {
53 .name = "gpio-keys",
54 .platform_data = &bd71828_powerkey_data,
55 .pdata_size = sizeof(bd71828_powerkey_data),
56 },
57 };
58
59 static const struct regmap_range volatile_ranges[] = {
60 {
61 .range_min = BD71828_REG_PS_CTRL_1,
62 .range_max = BD71828_REG_PS_CTRL_1,
63 }, {
64 .range_min = BD71828_REG_PS_CTRL_3,
65 .range_max = BD71828_REG_PS_CTRL_3,
66 }, {
67 .range_min = BD71828_REG_RTC_SEC,
68 .range_max = BD71828_REG_RTC_YEAR,
69 }, {
70 /*
71 * For now make all charger registers volatile because many
72 * needs to be and because the charger block is not that
73 * performance critical.
74 */
75 .range_min = BD71828_REG_CHG_STATE,
76 .range_max = BD71828_REG_CHG_FULL,
77 }, {
78 .range_min = BD71828_REG_INT_MAIN,
79 .range_max = BD71828_REG_IO_STAT,
80 },
81 };
82
83 static const struct regmap_access_table volatile_regs = {
84 .yes_ranges = &volatile_ranges[0],
85 .n_yes_ranges = ARRAY_SIZE(volatile_ranges),
86 };
87
88 static struct regmap_config bd71828_regmap = {
89 .reg_bits = 8,
90 .val_bits = 8,
91 .volatile_table = &volatile_regs,
92 .max_register = BD71828_MAX_REGISTER,
93 .cache_type = REGCACHE_RBTREE,
94 };
95
96 /*
97 * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
98 * access corect sub-IRQ registers based on bits that are set in main IRQ
99 * register.
100 */
101
102 static unsigned int bit0_offsets[] = {11}; /* RTC IRQ */
103 static unsigned int bit1_offsets[] = {10}; /* TEMP IRQ */
104 static unsigned int bit2_offsets[] = {6, 7, 8, 9}; /* BAT MON IRQ */
105 static unsigned int bit3_offsets[] = {5}; /* BAT IRQ */
106 static unsigned int bit4_offsets[] = {4}; /* CHG IRQ */
107 static unsigned int bit5_offsets[] = {3}; /* VSYS IRQ */
108 static unsigned int bit6_offsets[] = {1, 2}; /* DCIN IRQ */
109 static unsigned int bit7_offsets[] = {0}; /* BUCK IRQ */
110
111 static struct regmap_irq_sub_irq_map bd71828_sub_irq_offsets[] = {
112 REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
113 REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
114 REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
115 REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
116 REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
117 REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
118 REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
119 REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
120 };
121
122 static struct regmap_irq bd71828_irqs[] = {
123 REGMAP_IRQ_REG(BD71828_INT_BUCK1_OCP, 0, BD71828_INT_BUCK1_OCP_MASK),
124 REGMAP_IRQ_REG(BD71828_INT_BUCK2_OCP, 0, BD71828_INT_BUCK2_OCP_MASK),
125 REGMAP_IRQ_REG(BD71828_INT_BUCK3_OCP, 0, BD71828_INT_BUCK3_OCP_MASK),
126 REGMAP_IRQ_REG(BD71828_INT_BUCK4_OCP, 0, BD71828_INT_BUCK4_OCP_MASK),
127 REGMAP_IRQ_REG(BD71828_INT_BUCK5_OCP, 0, BD71828_INT_BUCK5_OCP_MASK),
128 REGMAP_IRQ_REG(BD71828_INT_BUCK6_OCP, 0, BD71828_INT_BUCK6_OCP_MASK),
129 REGMAP_IRQ_REG(BD71828_INT_BUCK7_OCP, 0, BD71828_INT_BUCK7_OCP_MASK),
130 REGMAP_IRQ_REG(BD71828_INT_PGFAULT, 0, BD71828_INT_PGFAULT_MASK),
131 /* DCIN1 interrupts */
132 REGMAP_IRQ_REG(BD71828_INT_DCIN_DET, 1, BD71828_INT_DCIN_DET_MASK),
133 REGMAP_IRQ_REG(BD71828_INT_DCIN_RMV, 1, BD71828_INT_DCIN_RMV_MASK),
134 REGMAP_IRQ_REG(BD71828_INT_CLPS_OUT, 1, BD71828_INT_CLPS_OUT_MASK),
135 REGMAP_IRQ_REG(BD71828_INT_CLPS_IN, 1, BD71828_INT_CLPS_IN_MASK),
136 /* DCIN2 interrupts */
137 REGMAP_IRQ_REG(BD71828_INT_DCIN_MON_RES, 2,
138 BD71828_INT_DCIN_MON_RES_MASK),
139 REGMAP_IRQ_REG(BD71828_INT_DCIN_MON_DET, 2,
140 BD71828_INT_DCIN_MON_DET_MASK),
141 REGMAP_IRQ_REG(BD71828_INT_LONGPUSH, 2, BD71828_INT_LONGPUSH_MASK),
142 REGMAP_IRQ_REG(BD71828_INT_MIDPUSH, 2, BD71828_INT_MIDPUSH_MASK),
143 REGMAP_IRQ_REG(BD71828_INT_SHORTPUSH, 2, BD71828_INT_SHORTPUSH_MASK),
144 REGMAP_IRQ_REG(BD71828_INT_PUSH, 2, BD71828_INT_PUSH_MASK),
145 REGMAP_IRQ_REG(BD71828_INT_WDOG, 2, BD71828_INT_WDOG_MASK),
146 REGMAP_IRQ_REG(BD71828_INT_SWRESET, 2, BD71828_INT_SWRESET_MASK),
147 /* Vsys */
148 REGMAP_IRQ_REG(BD71828_INT_VSYS_UV_RES, 3,
149 BD71828_INT_VSYS_UV_RES_MASK),
150 REGMAP_IRQ_REG(BD71828_INT_VSYS_UV_DET, 3,
151 BD71828_INT_VSYS_UV_DET_MASK),
152 REGMAP_IRQ_REG(BD71828_INT_VSYS_LOW_RES, 3,
153 BD71828_INT_VSYS_LOW_RES_MASK),
154 REGMAP_IRQ_REG(BD71828_INT_VSYS_LOW_DET, 3,
155 BD71828_INT_VSYS_LOW_DET_MASK),
156 REGMAP_IRQ_REG(BD71828_INT_VSYS_HALL_IN, 3,
157 BD71828_INT_VSYS_HALL_IN_MASK),
158 REGMAP_IRQ_REG(BD71828_INT_VSYS_HALL_TOGGLE, 3,
159 BD71828_INT_VSYS_HALL_TOGGLE_MASK),
160 REGMAP_IRQ_REG(BD71828_INT_VSYS_MON_RES, 3,
161 BD71828_INT_VSYS_MON_RES_MASK),
162 REGMAP_IRQ_REG(BD71828_INT_VSYS_MON_DET, 3,
163 BD71828_INT_VSYS_MON_DET_MASK),
164 /* Charger */
165 REGMAP_IRQ_REG(BD71828_INT_CHG_DCIN_ILIM, 4,
166 BD71828_INT_CHG_DCIN_ILIM_MASK),
167 REGMAP_IRQ_REG(BD71828_INT_CHG_TOPOFF_TO_DONE, 4,
168 BD71828_INT_CHG_TOPOFF_TO_DONE_MASK),
169 REGMAP_IRQ_REG(BD71828_INT_CHG_WDG_TEMP, 4,
170 BD71828_INT_CHG_WDG_TEMP_MASK),
171 REGMAP_IRQ_REG(BD71828_INT_CHG_WDG_TIME, 4,
172 BD71828_INT_CHG_WDG_TIME_MASK),
173 REGMAP_IRQ_REG(BD71828_INT_CHG_RECHARGE_RES, 4,
174 BD71828_INT_CHG_RECHARGE_RES_MASK),
175 REGMAP_IRQ_REG(BD71828_INT_CHG_RECHARGE_DET, 4,
176 BD71828_INT_CHG_RECHARGE_DET_MASK),
177 REGMAP_IRQ_REG(BD71828_INT_CHG_RANGED_TEMP_TRANSITION, 4,
178 BD71828_INT_CHG_RANGED_TEMP_TRANSITION_MASK),
179 REGMAP_IRQ_REG(BD71828_INT_CHG_STATE_TRANSITION, 4,
180 BD71828_INT_CHG_STATE_TRANSITION_MASK),
181 /* Battery */
182 REGMAP_IRQ_REG(BD71828_INT_BAT_TEMP_NORMAL, 5,
183 BD71828_INT_BAT_TEMP_NORMAL_MASK),
184 REGMAP_IRQ_REG(BD71828_INT_BAT_TEMP_ERANGE, 5,
185 BD71828_INT_BAT_TEMP_ERANGE_MASK),
186 REGMAP_IRQ_REG(BD71828_INT_BAT_TEMP_WARN, 5,
187 BD71828_INT_BAT_TEMP_WARN_MASK),
188 REGMAP_IRQ_REG(BD71828_INT_BAT_REMOVED, 5,
189 BD71828_INT_BAT_REMOVED_MASK),
190 REGMAP_IRQ_REG(BD71828_INT_BAT_DETECTED, 5,
191 BD71828_INT_BAT_DETECTED_MASK),
192 REGMAP_IRQ_REG(BD71828_INT_THERM_REMOVED, 5,
193 BD71828_INT_THERM_REMOVED_MASK),
194 REGMAP_IRQ_REG(BD71828_INT_THERM_DETECTED, 5,
195 BD71828_INT_THERM_DETECTED_MASK),
196 /* Battery Mon 1 */
197 REGMAP_IRQ_REG(BD71828_INT_BAT_DEAD, 6, BD71828_INT_BAT_DEAD_MASK),
198 REGMAP_IRQ_REG(BD71828_INT_BAT_SHORTC_RES, 6,
199 BD71828_INT_BAT_SHORTC_RES_MASK),
200 REGMAP_IRQ_REG(BD71828_INT_BAT_SHORTC_DET, 6,
201 BD71828_INT_BAT_SHORTC_DET_MASK),
202 REGMAP_IRQ_REG(BD71828_INT_BAT_LOW_VOLT_RES, 6,
203 BD71828_INT_BAT_LOW_VOLT_RES_MASK),
204 REGMAP_IRQ_REG(BD71828_INT_BAT_LOW_VOLT_DET, 6,
205 BD71828_INT_BAT_LOW_VOLT_DET_MASK),
206 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_VOLT_RES, 6,
207 BD71828_INT_BAT_OVER_VOLT_RES_MASK),
208 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_VOLT_DET, 6,
209 BD71828_INT_BAT_OVER_VOLT_DET_MASK),
210 /* Battery Mon 2 */
211 REGMAP_IRQ_REG(BD71828_INT_BAT_MON_RES, 7,
212 BD71828_INT_BAT_MON_RES_MASK),
213 REGMAP_IRQ_REG(BD71828_INT_BAT_MON_DET, 7,
214 BD71828_INT_BAT_MON_DET_MASK),
215 /* Battery Mon 3 (Coulomb counter) */
216 REGMAP_IRQ_REG(BD71828_INT_BAT_CC_MON1, 8,
217 BD71828_INT_BAT_CC_MON1_MASK),
218 REGMAP_IRQ_REG(BD71828_INT_BAT_CC_MON2, 8,
219 BD71828_INT_BAT_CC_MON2_MASK),
220 REGMAP_IRQ_REG(BD71828_INT_BAT_CC_MON3, 8,
221 BD71828_INT_BAT_CC_MON3_MASK),
222 /* Battery Mon 4 */
223 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_1_RES, 9,
224 BD71828_INT_BAT_OVER_CURR_1_RES_MASK),
225 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_1_DET, 9,
226 BD71828_INT_BAT_OVER_CURR_1_DET_MASK),
227 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_2_RES, 9,
228 BD71828_INT_BAT_OVER_CURR_2_RES_MASK),
229 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_2_DET, 9,
230 BD71828_INT_BAT_OVER_CURR_2_DET_MASK),
231 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_3_RES, 9,
232 BD71828_INT_BAT_OVER_CURR_3_RES_MASK),
233 REGMAP_IRQ_REG(BD71828_INT_BAT_OVER_CURR_3_DET, 9,
234 BD71828_INT_BAT_OVER_CURR_3_DET_MASK),
235 /* Temperature */
236 REGMAP_IRQ_REG(BD71828_INT_TEMP_BAT_LOW_RES, 10,
237 BD71828_INT_TEMP_BAT_LOW_RES_MASK),
238 REGMAP_IRQ_REG(BD71828_INT_TEMP_BAT_LOW_DET, 10,
239 BD71828_INT_TEMP_BAT_LOW_DET_MASK),
240 REGMAP_IRQ_REG(BD71828_INT_TEMP_BAT_HI_RES, 10,
241 BD71828_INT_TEMP_BAT_HI_RES_MASK),
242 REGMAP_IRQ_REG(BD71828_INT_TEMP_BAT_HI_DET, 10,
243 BD71828_INT_TEMP_BAT_HI_DET_MASK),
244 REGMAP_IRQ_REG(BD71828_INT_TEMP_CHIP_OVER_125_RES, 10,
245 BD71828_INT_TEMP_CHIP_OVER_125_RES_MASK),
246 REGMAP_IRQ_REG(BD71828_INT_TEMP_CHIP_OVER_125_DET, 10,
247 BD71828_INT_TEMP_CHIP_OVER_125_DET_MASK),
248 REGMAP_IRQ_REG(BD71828_INT_TEMP_CHIP_OVER_VF_DET, 10,
249 BD71828_INT_TEMP_CHIP_OVER_VF_DET_MASK),
250 REGMAP_IRQ_REG(BD71828_INT_TEMP_CHIP_OVER_VF_RES, 10,
251 BD71828_INT_TEMP_CHIP_OVER_VF_RES_MASK),
252 /* RTC Alarm */
253 REGMAP_IRQ_REG(BD71828_INT_RTC0, 11, BD71828_INT_RTC0_MASK),
254 REGMAP_IRQ_REG(BD71828_INT_RTC1, 11, BD71828_INT_RTC1_MASK),
255 REGMAP_IRQ_REG(BD71828_INT_RTC2, 11, BD71828_INT_RTC2_MASK),
256 };
257
258 static struct regmap_irq_chip bd71828_irq_chip = {
259 .name = "bd71828_irq",
260 .main_status = BD71828_REG_INT_MAIN,
261 .irqs = &bd71828_irqs[0],
262 .num_irqs = ARRAY_SIZE(bd71828_irqs),
263 .status_base = BD71828_REG_INT_BUCK,
264 .mask_base = BD71828_REG_INT_MASK_BUCK,
265 .ack_base = BD71828_REG_INT_BUCK,
266 .mask_invert = true,
267 .init_ack_masked = true,
268 .num_regs = 12,
269 .num_main_regs = 1,
270 .sub_reg_offsets = &bd71828_sub_irq_offsets[0],
271 .num_main_status_bits = 8,
272 .irq_reg_stride = 1,
273 };
274
bd71828_i2c_probe(struct i2c_client * i2c)275 static int bd71828_i2c_probe(struct i2c_client *i2c)
276 {
277 struct rohm_regmap_dev *chip;
278 struct regmap_irq_chip_data *irq_data;
279 int ret;
280
281 if (!i2c->irq) {
282 dev_err(&i2c->dev, "No IRQ configured\n");
283 return -EINVAL;
284 }
285
286 chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
287 if (!chip)
288 return -ENOMEM;
289
290 dev_set_drvdata(&i2c->dev, chip);
291
292 chip->regmap = devm_regmap_init_i2c(i2c, &bd71828_regmap);
293 if (IS_ERR(chip->regmap)) {
294 dev_err(&i2c->dev, "Failed to initialize Regmap\n");
295 return PTR_ERR(chip->regmap);
296 }
297
298 ret = devm_regmap_add_irq_chip(&i2c->dev, chip->regmap,
299 i2c->irq, IRQF_ONESHOT, 0,
300 &bd71828_irq_chip, &irq_data);
301 if (ret) {
302 dev_err(&i2c->dev, "Failed to add IRQ chip\n");
303 return ret;
304 }
305
306 dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",
307 bd71828_irq_chip.num_irqs);
308
309 ret = regmap_irq_get_virq(irq_data, BD71828_INT_SHORTPUSH);
310 if (ret < 0) {
311 dev_err(&i2c->dev, "Failed to get the power-key IRQ\n");
312 return ret;
313 }
314
315 button.irq = ret;
316
317 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
318 bd71828_mfd_cells,
319 ARRAY_SIZE(bd71828_mfd_cells), NULL, 0,
320 regmap_irq_get_domain(irq_data));
321 if (ret)
322 dev_err(&i2c->dev, "Failed to create subdevices\n");
323
324 return ret;
325 }
326
327 static const struct of_device_id bd71828_of_match[] = {
328 { .compatible = "rohm,bd71828", },
329 { },
330 };
331 MODULE_DEVICE_TABLE(of, bd71828_of_match);
332
333 static struct i2c_driver bd71828_drv = {
334 .driver = {
335 .name = "rohm-bd71828",
336 .of_match_table = bd71828_of_match,
337 },
338 .probe_new = &bd71828_i2c_probe,
339 };
340 module_i2c_driver(bd71828_drv);
341
342 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
343 MODULE_DESCRIPTION("ROHM BD71828 Power Management IC driver");
344 MODULE_LICENSE("GPL");
345
