1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * MFD core driver for Rockchip RK808/RK818
4 *
5 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
6 *
7 * Author: Chris Zhong <zyw@rock-chips.com>
8 * Author: Zhang Qing <zhangqing@rock-chips.com>
9 *
10 * Copyright (C) 2016 PHYTEC Messtechnik GmbH
11 *
12 * Author: Wadim Egorov <w.egorov@phytec.de>
13 */
14
15 #include <linux/i2c.h>
16 #include <linux/interrupt.h>
17 #include <linux/mfd/rk808.h>
18 #include <linux/mfd/core.h>
19 #include <linux/module.h>
20 #include <linux/of_device.h>
21 #include <linux/regmap.h>
22 #include <linux/reboot.h>
23
24 struct rk808_reg_data {
25 int addr;
26 int mask;
27 int value;
28 };
29
rk808_is_volatile_reg(struct device * dev,unsigned int reg)30 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
31 {
32 /*
33 * Notes:
34 * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
35 * we don't use that feature. It's better to cache.
36 * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
37 * bits are cleared in case when we shutoff anyway, but better safe.
38 */
39
40 switch (reg) {
41 case RK808_SECONDS_REG ... RK808_WEEKS_REG:
42 case RK808_RTC_STATUS_REG:
43 case RK808_VB_MON_REG:
44 case RK808_THERMAL_REG:
45 case RK808_DCDC_UV_STS_REG:
46 case RK808_LDO_UV_STS_REG:
47 case RK808_DCDC_PG_REG:
48 case RK808_LDO_PG_REG:
49 case RK808_DEVCTRL_REG:
50 case RK808_INT_STS_REG1:
51 case RK808_INT_STS_REG2:
52 return true;
53 }
54
55 return false;
56 }
57
rk817_is_volatile_reg(struct device * dev,unsigned int reg)58 static bool rk817_is_volatile_reg(struct device *dev, unsigned int reg)
59 {
60 /*
61 * Notes:
62 * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
63 * we don't use that feature. It's better to cache.
64 */
65
66 switch (reg) {
67 case RK817_SECONDS_REG ... RK817_WEEKS_REG:
68 case RK817_RTC_STATUS_REG:
69 case RK817_CODEC_DTOP_LPT_SRST:
70 case RK817_INT_STS_REG0:
71 case RK817_INT_STS_REG1:
72 case RK817_INT_STS_REG2:
73 case RK817_SYS_STS:
74 return true;
75 }
76
77 return true;
78 }
79
80 static const struct regmap_config rk818_regmap_config = {
81 .reg_bits = 8,
82 .val_bits = 8,
83 .max_register = RK818_USB_CTRL_REG,
84 .cache_type = REGCACHE_RBTREE,
85 .volatile_reg = rk808_is_volatile_reg,
86 };
87
88 static const struct regmap_config rk805_regmap_config = {
89 .reg_bits = 8,
90 .val_bits = 8,
91 .max_register = RK805_OFF_SOURCE_REG,
92 .cache_type = REGCACHE_RBTREE,
93 .volatile_reg = rk808_is_volatile_reg,
94 };
95
96 static const struct regmap_config rk808_regmap_config = {
97 .reg_bits = 8,
98 .val_bits = 8,
99 .max_register = RK808_IO_POL_REG,
100 .cache_type = REGCACHE_RBTREE,
101 .volatile_reg = rk808_is_volatile_reg,
102 };
103
104 static const struct regmap_config rk817_regmap_config = {
105 .reg_bits = 8,
106 .val_bits = 8,
107 .max_register = RK817_GPIO_INT_CFG,
108 .cache_type = REGCACHE_NONE,
109 .volatile_reg = rk817_is_volatile_reg,
110 };
111
112 static const struct resource rtc_resources[] = {
113 DEFINE_RES_IRQ(RK808_IRQ_RTC_ALARM),
114 };
115
116 static const struct resource rk817_rtc_resources[] = {
117 DEFINE_RES_IRQ(RK817_IRQ_RTC_ALARM),
118 };
119
120 static const struct resource rk805_key_resources[] = {
121 DEFINE_RES_IRQ(RK805_IRQ_PWRON_RISE),
122 DEFINE_RES_IRQ(RK805_IRQ_PWRON_FALL),
123 };
124
125 static const struct resource rk817_pwrkey_resources[] = {
126 DEFINE_RES_IRQ(RK817_IRQ_PWRON_RISE),
127 DEFINE_RES_IRQ(RK817_IRQ_PWRON_FALL),
128 };
129
130 static const struct mfd_cell rk805s[] = {
131 { .name = "rk808-clkout", },
132 { .name = "rk808-regulator", },
133 { .name = "rk805-pinctrl", },
134 {
135 .name = "rk808-rtc",
136 .num_resources = ARRAY_SIZE(rtc_resources),
137 .resources = &rtc_resources[0],
138 },
139 { .name = "rk805-pwrkey",
140 .num_resources = ARRAY_SIZE(rk805_key_resources),
141 .resources = &rk805_key_resources[0],
142 },
143 };
144
145 static const struct mfd_cell rk808s[] = {
146 { .name = "rk808-clkout", },
147 { .name = "rk808-regulator", },
148 {
149 .name = "rk808-rtc",
150 .num_resources = ARRAY_SIZE(rtc_resources),
151 .resources = rtc_resources,
152 },
153 };
154
155 static const struct mfd_cell rk817s[] = {
156 { .name = "rk808-clkout",},
157 { .name = "rk808-regulator",},
158 {
159 .name = "rk805-pwrkey",
160 .num_resources = ARRAY_SIZE(rk817_pwrkey_resources),
161 .resources = &rk817_pwrkey_resources[0],
162 },
163 {
164 .name = "rk808-rtc",
165 .num_resources = ARRAY_SIZE(rk817_rtc_resources),
166 .resources = &rk817_rtc_resources[0],
167 },
168 { .name = "rk817-codec",},
169 };
170
171 static const struct mfd_cell rk818s[] = {
172 { .name = "rk808-clkout", },
173 { .name = "rk808-regulator", },
174 {
175 .name = "rk808-rtc",
176 .num_resources = ARRAY_SIZE(rtc_resources),
177 .resources = rtc_resources,
178 },
179 };
180
181 static const struct rk808_reg_data rk805_pre_init_reg[] = {
182 {RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
183 RK805_BUCK1_2_ILMAX_4000MA},
184 {RK805_BUCK2_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
185 RK805_BUCK1_2_ILMAX_4000MA},
186 {RK805_BUCK3_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
187 RK805_BUCK3_ILMAX_3000MA},
188 {RK805_BUCK4_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
189 RK805_BUCK4_ILMAX_3500MA},
190 {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA},
191 {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
192 };
193
194 static const struct rk808_reg_data rk808_pre_init_reg[] = {
195 { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_150MA },
196 { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_200MA },
197 { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
198 { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK, BUCK_ILMIN_200MA },
199 { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_200MA },
200 { RK808_DCDC_UV_ACT_REG, BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
201 { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
202 VB_LO_SEL_3500MV },
203 };
204
205 static const struct rk808_reg_data rk817_pre_init_reg[] = {
206 {RK817_RTC_CTRL_REG, RTC_STOP, RTC_STOP},
207 /* Codec specific registers */
208 { RK817_CODEC_DTOP_VUCTL, MASK_ALL, 0x03 },
209 { RK817_CODEC_DTOP_VUCTIME, MASK_ALL, 0x00 },
210 { RK817_CODEC_DTOP_LPT_SRST, MASK_ALL, 0x00 },
211 { RK817_CODEC_DTOP_DIGEN_CLKE, MASK_ALL, 0x00 },
212 /* from vendor driver, CODEC_AREF_RTCFG0 not defined in data sheet */
213 { RK817_CODEC_AREF_RTCFG0, MASK_ALL, 0x00 },
214 { RK817_CODEC_AREF_RTCFG1, MASK_ALL, 0x06 },
215 { RK817_CODEC_AADC_CFG0, MASK_ALL, 0xc8 },
216 /* from vendor driver, CODEC_AADC_CFG1 not defined in data sheet */
217 { RK817_CODEC_AADC_CFG1, MASK_ALL, 0x00 },
218 { RK817_CODEC_DADC_VOLL, MASK_ALL, 0x00 },
219 { RK817_CODEC_DADC_VOLR, MASK_ALL, 0x00 },
220 { RK817_CODEC_DADC_SR_ACL0, MASK_ALL, 0x00 },
221 { RK817_CODEC_DADC_ALC1, MASK_ALL, 0x00 },
222 { RK817_CODEC_DADC_ALC2, MASK_ALL, 0x00 },
223 { RK817_CODEC_DADC_NG, MASK_ALL, 0x00 },
224 { RK817_CODEC_DADC_HPF, MASK_ALL, 0x00 },
225 { RK817_CODEC_DADC_RVOLL, MASK_ALL, 0xff },
226 { RK817_CODEC_DADC_RVOLR, MASK_ALL, 0xff },
227 { RK817_CODEC_AMIC_CFG0, MASK_ALL, 0x70 },
228 { RK817_CODEC_AMIC_CFG1, MASK_ALL, 0x00 },
229 { RK817_CODEC_DMIC_PGA_GAIN, MASK_ALL, 0x66 },
230 { RK817_CODEC_DMIC_LMT1, MASK_ALL, 0x00 },
231 { RK817_CODEC_DMIC_LMT2, MASK_ALL, 0x00 },
232 { RK817_CODEC_DMIC_NG1, MASK_ALL, 0x00 },
233 { RK817_CODEC_DMIC_NG2, MASK_ALL, 0x00 },
234 /* from vendor driver, CODEC_ADAC_CFG0 not defined in data sheet */
235 { RK817_CODEC_ADAC_CFG0, MASK_ALL, 0x00 },
236 { RK817_CODEC_ADAC_CFG1, MASK_ALL, 0x07 },
237 { RK817_CODEC_DDAC_POPD_DACST, MASK_ALL, 0x82 },
238 { RK817_CODEC_DDAC_VOLL, MASK_ALL, 0x00 },
239 { RK817_CODEC_DDAC_VOLR, MASK_ALL, 0x00 },
240 { RK817_CODEC_DDAC_SR_LMT0, MASK_ALL, 0x00 },
241 { RK817_CODEC_DDAC_LMT1, MASK_ALL, 0x00 },
242 { RK817_CODEC_DDAC_LMT2, MASK_ALL, 0x00 },
243 { RK817_CODEC_DDAC_MUTE_MIXCTL, MASK_ALL, 0xa0 },
244 { RK817_CODEC_DDAC_RVOLL, MASK_ALL, 0xff },
245 { RK817_CODEC_DADC_RVOLR, MASK_ALL, 0xff },
246 { RK817_CODEC_AMIC_CFG0, MASK_ALL, 0x70 },
247 { RK817_CODEC_AMIC_CFG1, MASK_ALL, 0x00 },
248 { RK817_CODEC_DMIC_PGA_GAIN, MASK_ALL, 0x66 },
249 { RK817_CODEC_DMIC_LMT1, MASK_ALL, 0x00 },
250 { RK817_CODEC_DMIC_LMT2, MASK_ALL, 0x00 },
251 { RK817_CODEC_DMIC_NG1, MASK_ALL, 0x00 },
252 { RK817_CODEC_DMIC_NG2, MASK_ALL, 0x00 },
253 /* from vendor driver, CODEC_ADAC_CFG0 not defined in data sheet */
254 { RK817_CODEC_ADAC_CFG0, MASK_ALL, 0x00 },
255 { RK817_CODEC_ADAC_CFG1, MASK_ALL, 0x07 },
256 { RK817_CODEC_DDAC_POPD_DACST, MASK_ALL, 0x82 },
257 { RK817_CODEC_DDAC_VOLL, MASK_ALL, 0x00 },
258 { RK817_CODEC_DDAC_VOLR, MASK_ALL, 0x00 },
259 { RK817_CODEC_DDAC_SR_LMT0, MASK_ALL, 0x00 },
260 { RK817_CODEC_DDAC_LMT1, MASK_ALL, 0x00 },
261 { RK817_CODEC_DDAC_LMT2, MASK_ALL, 0x00 },
262 { RK817_CODEC_DDAC_MUTE_MIXCTL, MASK_ALL, 0xa0 },
263 { RK817_CODEC_DDAC_RVOLL, MASK_ALL, 0xff },
264 { RK817_CODEC_DDAC_RVOLR, MASK_ALL, 0xff },
265 { RK817_CODEC_AHP_ANTI0, MASK_ALL, 0x00 },
266 { RK817_CODEC_AHP_ANTI1, MASK_ALL, 0x00 },
267 { RK817_CODEC_AHP_CFG0, MASK_ALL, 0xe0 },
268 { RK817_CODEC_AHP_CFG1, MASK_ALL, 0x1f },
269 { RK817_CODEC_AHP_CP, MASK_ALL, 0x09 },
270 { RK817_CODEC_ACLASSD_CFG1, MASK_ALL, 0x69 },
271 { RK817_CODEC_ACLASSD_CFG2, MASK_ALL, 0x44 },
272 { RK817_CODEC_APLL_CFG0, MASK_ALL, 0x04 },
273 { RK817_CODEC_APLL_CFG1, MASK_ALL, 0x00 },
274 { RK817_CODEC_APLL_CFG2, MASK_ALL, 0x30 },
275 { RK817_CODEC_APLL_CFG3, MASK_ALL, 0x19 },
276 { RK817_CODEC_APLL_CFG4, MASK_ALL, 0x65 },
277 { RK817_CODEC_APLL_CFG5, MASK_ALL, 0x01 },
278 { RK817_CODEC_DI2S_CKM, MASK_ALL, 0x01 },
279 { RK817_CODEC_DI2S_RSD, MASK_ALL, 0x00 },
280 { RK817_CODEC_DI2S_RXCR1, MASK_ALL, 0x00 },
281 { RK817_CODEC_DI2S_RXCR2, MASK_ALL, 0x17 },
282 { RK817_CODEC_DI2S_RXCMD_TSD, MASK_ALL, 0x00 },
283 { RK817_CODEC_DI2S_TXCR1, MASK_ALL, 0x00 },
284 { RK817_CODEC_DI2S_TXCR2, MASK_ALL, 0x17 },
285 { RK817_CODEC_DI2S_TXCR3_TXCMD, MASK_ALL, 0x00 },
286 {RK817_GPIO_INT_CFG, RK817_INT_POL_MSK, RK817_INT_POL_L},
287 {RK817_SYS_CFG(1), RK817_HOTDIE_TEMP_MSK | RK817_TSD_TEMP_MSK,
288 RK817_HOTDIE_105 | RK817_TSD_140},
289 };
290
291 static const struct rk808_reg_data rk818_pre_init_reg[] = {
292 /* improve efficiency */
293 { RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK, BUCK_ILMIN_250MA },
294 { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_250MA },
295 { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
296 { RK818_USB_CTRL_REG, RK818_USB_ILIM_SEL_MASK,
297 RK818_USB_ILMIN_2000MA },
298 /* close charger when usb lower then 3.4V */
299 { RK818_USB_CTRL_REG, RK818_USB_CHG_SD_VSEL_MASK,
300 (0x7 << 4) },
301 /* no action when vref */
302 { RK818_H5V_EN_REG, BIT(1), RK818_REF_RDY_CTRL },
303 /* enable HDMI 5V */
304 { RK818_H5V_EN_REG, BIT(0), RK818_H5V_EN },
305 { RK808_VB_MON_REG, MASK_ALL, VB_LO_ACT |
306 VB_LO_SEL_3500MV },
307 };
308
309 static const struct regmap_irq rk805_irqs[] = {
310 [RK805_IRQ_PWRON_RISE] = {
311 .mask = RK805_IRQ_PWRON_RISE_MSK,
312 .reg_offset = 0,
313 },
314 [RK805_IRQ_VB_LOW] = {
315 .mask = RK805_IRQ_VB_LOW_MSK,
316 .reg_offset = 0,
317 },
318 [RK805_IRQ_PWRON] = {
319 .mask = RK805_IRQ_PWRON_MSK,
320 .reg_offset = 0,
321 },
322 [RK805_IRQ_PWRON_LP] = {
323 .mask = RK805_IRQ_PWRON_LP_MSK,
324 .reg_offset = 0,
325 },
326 [RK805_IRQ_HOTDIE] = {
327 .mask = RK805_IRQ_HOTDIE_MSK,
328 .reg_offset = 0,
329 },
330 [RK805_IRQ_RTC_ALARM] = {
331 .mask = RK805_IRQ_RTC_ALARM_MSK,
332 .reg_offset = 0,
333 },
334 [RK805_IRQ_RTC_PERIOD] = {
335 .mask = RK805_IRQ_RTC_PERIOD_MSK,
336 .reg_offset = 0,
337 },
338 [RK805_IRQ_PWRON_FALL] = {
339 .mask = RK805_IRQ_PWRON_FALL_MSK,
340 .reg_offset = 0,
341 },
342 };
343
344 static const struct regmap_irq rk808_irqs[] = {
345 /* INT_STS */
346 [RK808_IRQ_VOUT_LO] = {
347 .mask = RK808_IRQ_VOUT_LO_MSK,
348 .reg_offset = 0,
349 },
350 [RK808_IRQ_VB_LO] = {
351 .mask = RK808_IRQ_VB_LO_MSK,
352 .reg_offset = 0,
353 },
354 [RK808_IRQ_PWRON] = {
355 .mask = RK808_IRQ_PWRON_MSK,
356 .reg_offset = 0,
357 },
358 [RK808_IRQ_PWRON_LP] = {
359 .mask = RK808_IRQ_PWRON_LP_MSK,
360 .reg_offset = 0,
361 },
362 [RK808_IRQ_HOTDIE] = {
363 .mask = RK808_IRQ_HOTDIE_MSK,
364 .reg_offset = 0,
365 },
366 [RK808_IRQ_RTC_ALARM] = {
367 .mask = RK808_IRQ_RTC_ALARM_MSK,
368 .reg_offset = 0,
369 },
370 [RK808_IRQ_RTC_PERIOD] = {
371 .mask = RK808_IRQ_RTC_PERIOD_MSK,
372 .reg_offset = 0,
373 },
374
375 /* INT_STS2 */
376 [RK808_IRQ_PLUG_IN_INT] = {
377 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
378 .reg_offset = 1,
379 },
380 [RK808_IRQ_PLUG_OUT_INT] = {
381 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
382 .reg_offset = 1,
383 },
384 };
385
386 static const struct regmap_irq rk818_irqs[] = {
387 /* INT_STS */
388 [RK818_IRQ_VOUT_LO] = {
389 .mask = RK818_IRQ_VOUT_LO_MSK,
390 .reg_offset = 0,
391 },
392 [RK818_IRQ_VB_LO] = {
393 .mask = RK818_IRQ_VB_LO_MSK,
394 .reg_offset = 0,
395 },
396 [RK818_IRQ_PWRON] = {
397 .mask = RK818_IRQ_PWRON_MSK,
398 .reg_offset = 0,
399 },
400 [RK818_IRQ_PWRON_LP] = {
401 .mask = RK818_IRQ_PWRON_LP_MSK,
402 .reg_offset = 0,
403 },
404 [RK818_IRQ_HOTDIE] = {
405 .mask = RK818_IRQ_HOTDIE_MSK,
406 .reg_offset = 0,
407 },
408 [RK818_IRQ_RTC_ALARM] = {
409 .mask = RK818_IRQ_RTC_ALARM_MSK,
410 .reg_offset = 0,
411 },
412 [RK818_IRQ_RTC_PERIOD] = {
413 .mask = RK818_IRQ_RTC_PERIOD_MSK,
414 .reg_offset = 0,
415 },
416 [RK818_IRQ_USB_OV] = {
417 .mask = RK818_IRQ_USB_OV_MSK,
418 .reg_offset = 0,
419 },
420
421 /* INT_STS2 */
422 [RK818_IRQ_PLUG_IN] = {
423 .mask = RK818_IRQ_PLUG_IN_MSK,
424 .reg_offset = 1,
425 },
426 [RK818_IRQ_PLUG_OUT] = {
427 .mask = RK818_IRQ_PLUG_OUT_MSK,
428 .reg_offset = 1,
429 },
430 [RK818_IRQ_CHG_OK] = {
431 .mask = RK818_IRQ_CHG_OK_MSK,
432 .reg_offset = 1,
433 },
434 [RK818_IRQ_CHG_TE] = {
435 .mask = RK818_IRQ_CHG_TE_MSK,
436 .reg_offset = 1,
437 },
438 [RK818_IRQ_CHG_TS1] = {
439 .mask = RK818_IRQ_CHG_TS1_MSK,
440 .reg_offset = 1,
441 },
442 [RK818_IRQ_TS2] = {
443 .mask = RK818_IRQ_TS2_MSK,
444 .reg_offset = 1,
445 },
446 [RK818_IRQ_CHG_CVTLIM] = {
447 .mask = RK818_IRQ_CHG_CVTLIM_MSK,
448 .reg_offset = 1,
449 },
450 [RK818_IRQ_DISCHG_ILIM] = {
451 .mask = RK818_IRQ_DISCHG_ILIM_MSK,
452 .reg_offset = 1,
453 },
454 };
455
456 static const struct regmap_irq rk817_irqs[RK817_IRQ_END] = {
457 REGMAP_IRQ_REG_LINE(0, 8),
458 REGMAP_IRQ_REG_LINE(1, 8),
459 REGMAP_IRQ_REG_LINE(2, 8),
460 REGMAP_IRQ_REG_LINE(3, 8),
461 REGMAP_IRQ_REG_LINE(4, 8),
462 REGMAP_IRQ_REG_LINE(5, 8),
463 REGMAP_IRQ_REG_LINE(6, 8),
464 REGMAP_IRQ_REG_LINE(7, 8),
465 REGMAP_IRQ_REG_LINE(8, 8),
466 REGMAP_IRQ_REG_LINE(9, 8),
467 REGMAP_IRQ_REG_LINE(10, 8),
468 REGMAP_IRQ_REG_LINE(11, 8),
469 REGMAP_IRQ_REG_LINE(12, 8),
470 REGMAP_IRQ_REG_LINE(13, 8),
471 REGMAP_IRQ_REG_LINE(14, 8),
472 REGMAP_IRQ_REG_LINE(15, 8),
473 REGMAP_IRQ_REG_LINE(16, 8),
474 REGMAP_IRQ_REG_LINE(17, 8),
475 REGMAP_IRQ_REG_LINE(18, 8),
476 REGMAP_IRQ_REG_LINE(19, 8),
477 REGMAP_IRQ_REG_LINE(20, 8),
478 REGMAP_IRQ_REG_LINE(21, 8),
479 REGMAP_IRQ_REG_LINE(22, 8),
480 REGMAP_IRQ_REG_LINE(23, 8)
481 };
482
483 static struct regmap_irq_chip rk805_irq_chip = {
484 .name = "rk805",
485 .irqs = rk805_irqs,
486 .num_irqs = ARRAY_SIZE(rk805_irqs),
487 .num_regs = 1,
488 .status_base = RK805_INT_STS_REG,
489 .mask_base = RK805_INT_STS_MSK_REG,
490 .ack_base = RK805_INT_STS_REG,
491 .init_ack_masked = true,
492 };
493
494 static const struct regmap_irq_chip rk808_irq_chip = {
495 .name = "rk808",
496 .irqs = rk808_irqs,
497 .num_irqs = ARRAY_SIZE(rk808_irqs),
498 .num_regs = 2,
499 .irq_reg_stride = 2,
500 .status_base = RK808_INT_STS_REG1,
501 .mask_base = RK808_INT_STS_MSK_REG1,
502 .ack_base = RK808_INT_STS_REG1,
503 .init_ack_masked = true,
504 };
505
506 static struct regmap_irq_chip rk817_irq_chip = {
507 .name = "rk817",
508 .irqs = rk817_irqs,
509 .num_irqs = ARRAY_SIZE(rk817_irqs),
510 .num_regs = 3,
511 .irq_reg_stride = 2,
512 .status_base = RK817_INT_STS_REG0,
513 .mask_base = RK817_INT_STS_MSK_REG0,
514 .ack_base = RK817_INT_STS_REG0,
515 .init_ack_masked = true,
516 };
517
518 static const struct regmap_irq_chip rk818_irq_chip = {
519 .name = "rk818",
520 .irqs = rk818_irqs,
521 .num_irqs = ARRAY_SIZE(rk818_irqs),
522 .num_regs = 2,
523 .irq_reg_stride = 2,
524 .status_base = RK818_INT_STS_REG1,
525 .mask_base = RK818_INT_STS_MSK_REG1,
526 .ack_base = RK818_INT_STS_REG1,
527 .init_ack_masked = true,
528 };
529
530 static struct i2c_client *rk808_i2c_client;
531
rk808_pm_power_off(void)532 static void rk808_pm_power_off(void)
533 {
534 int ret;
535 unsigned int reg, bit;
536 struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
537
538 switch (rk808->variant) {
539 case RK805_ID:
540 reg = RK805_DEV_CTRL_REG;
541 bit = DEV_OFF;
542 break;
543 case RK808_ID:
544 reg = RK808_DEVCTRL_REG,
545 bit = DEV_OFF_RST;
546 break;
547 case RK809_ID:
548 case RK817_ID:
549 reg = RK817_SYS_CFG(3);
550 bit = DEV_OFF;
551 break;
552 case RK818_ID:
553 reg = RK818_DEVCTRL_REG;
554 bit = DEV_OFF;
555 break;
556 default:
557 return;
558 }
559 ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
560 if (ret)
561 dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
562 }
563
rk808_restart_notify(struct notifier_block * this,unsigned long mode,void * cmd)564 static int rk808_restart_notify(struct notifier_block *this, unsigned long mode, void *cmd)
565 {
566 struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
567 unsigned int reg, bit;
568 int ret;
569
570 switch (rk808->variant) {
571 case RK809_ID:
572 case RK817_ID:
573 reg = RK817_SYS_CFG(3);
574 bit = DEV_RST;
575 break;
576
577 default:
578 return NOTIFY_DONE;
579 }
580 ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
581 if (ret)
582 dev_err(&rk808_i2c_client->dev, "Failed to restart device!\n");
583
584 return NOTIFY_DONE;
585 }
586
587 static struct notifier_block rk808_restart_handler = {
588 .notifier_call = rk808_restart_notify,
589 .priority = 192,
590 };
591
rk8xx_shutdown(struct i2c_client * client)592 static void rk8xx_shutdown(struct i2c_client *client)
593 {
594 struct rk808 *rk808 = i2c_get_clientdata(client);
595 int ret;
596
597 switch (rk808->variant) {
598 case RK805_ID:
599 ret = regmap_update_bits(rk808->regmap,
600 RK805_GPIO_IO_POL_REG,
601 SLP_SD_MSK,
602 SHUTDOWN_FUN);
603 break;
604 case RK809_ID:
605 case RK817_ID:
606 ret = regmap_update_bits(rk808->regmap,
607 RK817_SYS_CFG(3),
608 RK817_SLPPIN_FUNC_MSK,
609 SLPPIN_DN_FUN);
610 break;
611 default:
612 return;
613 }
614 if (ret)
615 dev_warn(&client->dev,
616 "Cannot switch to power down function\n");
617 }
618
619 static const struct of_device_id rk808_of_match[] = {
620 { .compatible = "rockchip,rk805" },
621 { .compatible = "rockchip,rk808" },
622 { .compatible = "rockchip,rk809" },
623 { .compatible = "rockchip,rk817" },
624 { .compatible = "rockchip,rk818" },
625 { },
626 };
627 MODULE_DEVICE_TABLE(of, rk808_of_match);
628
rk808_probe(struct i2c_client * client,const struct i2c_device_id * id)629 static int rk808_probe(struct i2c_client *client,
630 const struct i2c_device_id *id)
631 {
632 struct device_node *np = client->dev.of_node;
633 struct rk808 *rk808;
634 const struct rk808_reg_data *pre_init_reg;
635 const struct mfd_cell *cells;
636 int nr_pre_init_regs;
637 int nr_cells;
638 int msb, lsb;
639 unsigned char pmic_id_msb, pmic_id_lsb;
640 int ret;
641 int i;
642
643 rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
644 if (!rk808)
645 return -ENOMEM;
646
647 if (of_device_is_compatible(np, "rockchip,rk817") ||
648 of_device_is_compatible(np, "rockchip,rk809")) {
649 pmic_id_msb = RK817_ID_MSB;
650 pmic_id_lsb = RK817_ID_LSB;
651 } else {
652 pmic_id_msb = RK808_ID_MSB;
653 pmic_id_lsb = RK808_ID_LSB;
654 }
655
656 /* Read chip variant */
657 msb = i2c_smbus_read_byte_data(client, pmic_id_msb);
658 if (msb < 0) {
659 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
660 RK808_ID_MSB);
661 return msb;
662 }
663
664 lsb = i2c_smbus_read_byte_data(client, pmic_id_lsb);
665 if (lsb < 0) {
666 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
667 RK808_ID_LSB);
668 return lsb;
669 }
670
671 rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
672 dev_info(&client->dev, "chip id: 0x%x\n", (unsigned int)rk808->variant);
673
674 switch (rk808->variant) {
675 case RK805_ID:
676 rk808->regmap_cfg = &rk805_regmap_config;
677 rk808->regmap_irq_chip = &rk805_irq_chip;
678 pre_init_reg = rk805_pre_init_reg;
679 nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg);
680 cells = rk805s;
681 nr_cells = ARRAY_SIZE(rk805s);
682 break;
683 case RK808_ID:
684 rk808->regmap_cfg = &rk808_regmap_config;
685 rk808->regmap_irq_chip = &rk808_irq_chip;
686 pre_init_reg = rk808_pre_init_reg;
687 nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg);
688 cells = rk808s;
689 nr_cells = ARRAY_SIZE(rk808s);
690 break;
691 case RK818_ID:
692 rk808->regmap_cfg = &rk818_regmap_config;
693 rk808->regmap_irq_chip = &rk818_irq_chip;
694 pre_init_reg = rk818_pre_init_reg;
695 nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg);
696 cells = rk818s;
697 nr_cells = ARRAY_SIZE(rk818s);
698 break;
699 case RK809_ID:
700 case RK817_ID:
701 rk808->regmap_cfg = &rk817_regmap_config;
702 rk808->regmap_irq_chip = &rk817_irq_chip;
703 pre_init_reg = rk817_pre_init_reg;
704 nr_pre_init_regs = ARRAY_SIZE(rk817_pre_init_reg);
705 cells = rk817s;
706 nr_cells = ARRAY_SIZE(rk817s);
707 break;
708 default:
709 dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
710 rk808->variant);
711 return -EINVAL;
712 }
713
714 rk808->i2c = client;
715 i2c_set_clientdata(client, rk808);
716
717 rk808->regmap = devm_regmap_init_i2c(client, rk808->regmap_cfg);
718 if (IS_ERR(rk808->regmap)) {
719 dev_err(&client->dev, "regmap initialization failed\n");
720 return PTR_ERR(rk808->regmap);
721 }
722
723 if (!client->irq) {
724 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
725 return -EINVAL;
726 }
727
728 ret = regmap_add_irq_chip(rk808->regmap, client->irq,
729 IRQF_ONESHOT, -1,
730 rk808->regmap_irq_chip, &rk808->irq_data);
731 if (ret) {
732 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
733 return ret;
734 }
735
736 for (i = 0; i < nr_pre_init_regs; i++) {
737 ret = regmap_update_bits(rk808->regmap,
738 pre_init_reg[i].addr,
739 pre_init_reg[i].mask,
740 pre_init_reg[i].value);
741 if (ret) {
742 dev_err(&client->dev,
743 "0x%x write err\n",
744 pre_init_reg[i].addr);
745 return ret;
746 }
747 }
748
749 ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
750 cells, nr_cells, NULL, 0,
751 regmap_irq_get_domain(rk808->irq_data));
752 if (ret) {
753 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
754 goto err_irq;
755 }
756
757 if (of_property_read_bool(np, "rockchip,system-power-controller")) {
758 rk808_i2c_client = client;
759 pm_power_off = rk808_pm_power_off;
760
761 switch (rk808->variant) {
762 case RK809_ID:
763 case RK817_ID:
764 ret = register_restart_handler(&rk808_restart_handler);
765 if (ret)
766 dev_warn(&client->dev, "failed to register rst handler, %d\n", ret);
767 break;
768 default:
769 dev_dbg(&client->dev, "pmic controlled board reset not supported\n");
770 break;
771 }
772 }
773
774 return 0;
775
776 err_irq:
777 regmap_del_irq_chip(client->irq, rk808->irq_data);
778 return ret;
779 }
780
rk808_remove(struct i2c_client * client)781 static int rk808_remove(struct i2c_client *client)
782 {
783 struct rk808 *rk808 = i2c_get_clientdata(client);
784
785 regmap_del_irq_chip(client->irq, rk808->irq_data);
786
787 /**
788 * pm_power_off may points to a function from another module.
789 * Check if the pointer is set by us and only then overwrite it.
790 */
791 if (pm_power_off == rk808_pm_power_off)
792 pm_power_off = NULL;
793
794 unregister_restart_handler(&rk808_restart_handler);
795
796 return 0;
797 }
798
rk8xx_suspend(struct device * dev)799 static int __maybe_unused rk8xx_suspend(struct device *dev)
800 {
801 struct rk808 *rk808 = i2c_get_clientdata(to_i2c_client(dev));
802 int ret = 0;
803
804 switch (rk808->variant) {
805 case RK805_ID:
806 ret = regmap_update_bits(rk808->regmap,
807 RK805_GPIO_IO_POL_REG,
808 SLP_SD_MSK,
809 SLEEP_FUN);
810 break;
811 case RK809_ID:
812 case RK817_ID:
813 ret = regmap_update_bits(rk808->regmap,
814 RK817_SYS_CFG(3),
815 RK817_SLPPIN_FUNC_MSK,
816 SLPPIN_SLP_FUN);
817 break;
818 default:
819 break;
820 }
821
822 return ret;
823 }
824
rk8xx_resume(struct device * dev)825 static int __maybe_unused rk8xx_resume(struct device *dev)
826 {
827 struct rk808 *rk808 = i2c_get_clientdata(to_i2c_client(dev));
828 int ret = 0;
829
830 switch (rk808->variant) {
831 case RK809_ID:
832 case RK817_ID:
833 ret = regmap_update_bits(rk808->regmap,
834 RK817_SYS_CFG(3),
835 RK817_SLPPIN_FUNC_MSK,
836 SLPPIN_NULL_FUN);
837 break;
838 default:
839 break;
840 }
841
842 return ret;
843 }
844 static SIMPLE_DEV_PM_OPS(rk8xx_pm_ops, rk8xx_suspend, rk8xx_resume);
845
846 static struct i2c_driver rk808_i2c_driver = {
847 .driver = {
848 .name = "rk808",
849 .of_match_table = rk808_of_match,
850 .pm = &rk8xx_pm_ops,
851 },
852 .probe = rk808_probe,
853 .remove = rk808_remove,
854 .shutdown = rk8xx_shutdown,
855 };
856
857 module_i2c_driver(rk808_i2c_driver);
858
859 MODULE_LICENSE("GPL");
860 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
861 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
862 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
863 MODULE_DESCRIPTION("RK808/RK818 PMIC driver");
864