xref: /openbmc/linux/drivers/mfd/da9052-core.c (revision ca9642a6)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Device access for Dialog DA9052 PMICs.
4  *
5  * Copyright(c) 2011 Dialog Semiconductor Ltd.
6  *
7  * Author: David Dajun Chen <dchen@diasemi.com>
8  */
9 
10 #include <linux/device.h>
11 #include <linux/delay.h>
12 #include <linux/input.h>
13 #include <linux/interrupt.h>
14 #include <linux/mfd/core.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
17 #include <linux/property.h>
18 
19 #include <linux/mfd/da9052/da9052.h>
20 #include <linux/mfd/da9052/pdata.h>
21 #include <linux/mfd/da9052/reg.h>
22 
da9052_reg_readable(struct device * dev,unsigned int reg)23 static bool da9052_reg_readable(struct device *dev, unsigned int reg)
24 {
25 	switch (reg) {
26 	case DA9052_PAGE0_CON_REG:
27 	case DA9052_STATUS_A_REG:
28 	case DA9052_STATUS_B_REG:
29 	case DA9052_STATUS_C_REG:
30 	case DA9052_STATUS_D_REG:
31 	case DA9052_EVENT_A_REG:
32 	case DA9052_EVENT_B_REG:
33 	case DA9052_EVENT_C_REG:
34 	case DA9052_EVENT_D_REG:
35 	case DA9052_FAULTLOG_REG:
36 	case DA9052_IRQ_MASK_A_REG:
37 	case DA9052_IRQ_MASK_B_REG:
38 	case DA9052_IRQ_MASK_C_REG:
39 	case DA9052_IRQ_MASK_D_REG:
40 	case DA9052_CONTROL_A_REG:
41 	case DA9052_CONTROL_B_REG:
42 	case DA9052_CONTROL_C_REG:
43 	case DA9052_CONTROL_D_REG:
44 	case DA9052_PDDIS_REG:
45 	case DA9052_INTERFACE_REG:
46 	case DA9052_RESET_REG:
47 	case DA9052_GPIO_0_1_REG:
48 	case DA9052_GPIO_2_3_REG:
49 	case DA9052_GPIO_4_5_REG:
50 	case DA9052_GPIO_6_7_REG:
51 	case DA9052_GPIO_8_9_REG:
52 	case DA9052_GPIO_10_11_REG:
53 	case DA9052_GPIO_12_13_REG:
54 	case DA9052_GPIO_14_15_REG:
55 	case DA9052_ID_0_1_REG:
56 	case DA9052_ID_2_3_REG:
57 	case DA9052_ID_4_5_REG:
58 	case DA9052_ID_6_7_REG:
59 	case DA9052_ID_8_9_REG:
60 	case DA9052_ID_10_11_REG:
61 	case DA9052_ID_12_13_REG:
62 	case DA9052_ID_14_15_REG:
63 	case DA9052_ID_16_17_REG:
64 	case DA9052_ID_18_19_REG:
65 	case DA9052_ID_20_21_REG:
66 	case DA9052_SEQ_STATUS_REG:
67 	case DA9052_SEQ_A_REG:
68 	case DA9052_SEQ_B_REG:
69 	case DA9052_SEQ_TIMER_REG:
70 	case DA9052_BUCKA_REG:
71 	case DA9052_BUCKB_REG:
72 	case DA9052_BUCKCORE_REG:
73 	case DA9052_BUCKPRO_REG:
74 	case DA9052_BUCKMEM_REG:
75 	case DA9052_BUCKPERI_REG:
76 	case DA9052_LDO1_REG:
77 	case DA9052_LDO2_REG:
78 	case DA9052_LDO3_REG:
79 	case DA9052_LDO4_REG:
80 	case DA9052_LDO5_REG:
81 	case DA9052_LDO6_REG:
82 	case DA9052_LDO7_REG:
83 	case DA9052_LDO8_REG:
84 	case DA9052_LDO9_REG:
85 	case DA9052_LDO10_REG:
86 	case DA9052_SUPPLY_REG:
87 	case DA9052_PULLDOWN_REG:
88 	case DA9052_CHGBUCK_REG:
89 	case DA9052_WAITCONT_REG:
90 	case DA9052_ISET_REG:
91 	case DA9052_BATCHG_REG:
92 	case DA9052_CHG_CONT_REG:
93 	case DA9052_INPUT_CONT_REG:
94 	case DA9052_CHG_TIME_REG:
95 	case DA9052_BBAT_CONT_REG:
96 	case DA9052_BOOST_REG:
97 	case DA9052_LED_CONT_REG:
98 	case DA9052_LEDMIN123_REG:
99 	case DA9052_LED1_CONF_REG:
100 	case DA9052_LED2_CONF_REG:
101 	case DA9052_LED3_CONF_REG:
102 	case DA9052_LED1CONT_REG:
103 	case DA9052_LED2CONT_REG:
104 	case DA9052_LED3CONT_REG:
105 	case DA9052_LED_CONT_4_REG:
106 	case DA9052_LED_CONT_5_REG:
107 	case DA9052_ADC_MAN_REG:
108 	case DA9052_ADC_CONT_REG:
109 	case DA9052_ADC_RES_L_REG:
110 	case DA9052_ADC_RES_H_REG:
111 	case DA9052_VDD_RES_REG:
112 	case DA9052_VDD_MON_REG:
113 	case DA9052_ICHG_AV_REG:
114 	case DA9052_ICHG_THD_REG:
115 	case DA9052_ICHG_END_REG:
116 	case DA9052_TBAT_RES_REG:
117 	case DA9052_TBAT_HIGHP_REG:
118 	case DA9052_TBAT_HIGHN_REG:
119 	case DA9052_TBAT_LOW_REG:
120 	case DA9052_T_OFFSET_REG:
121 	case DA9052_ADCIN4_RES_REG:
122 	case DA9052_AUTO4_HIGH_REG:
123 	case DA9052_AUTO4_LOW_REG:
124 	case DA9052_ADCIN5_RES_REG:
125 	case DA9052_AUTO5_HIGH_REG:
126 	case DA9052_AUTO5_LOW_REG:
127 	case DA9052_ADCIN6_RES_REG:
128 	case DA9052_AUTO6_HIGH_REG:
129 	case DA9052_AUTO6_LOW_REG:
130 	case DA9052_TJUNC_RES_REG:
131 	case DA9052_TSI_CONT_A_REG:
132 	case DA9052_TSI_CONT_B_REG:
133 	case DA9052_TSI_X_MSB_REG:
134 	case DA9052_TSI_Y_MSB_REG:
135 	case DA9052_TSI_LSB_REG:
136 	case DA9052_TSI_Z_MSB_REG:
137 	case DA9052_COUNT_S_REG:
138 	case DA9052_COUNT_MI_REG:
139 	case DA9052_COUNT_H_REG:
140 	case DA9052_COUNT_D_REG:
141 	case DA9052_COUNT_MO_REG:
142 	case DA9052_COUNT_Y_REG:
143 	case DA9052_ALARM_MI_REG:
144 	case DA9052_ALARM_H_REG:
145 	case DA9052_ALARM_D_REG:
146 	case DA9052_ALARM_MO_REG:
147 	case DA9052_ALARM_Y_REG:
148 	case DA9052_SECOND_A_REG:
149 	case DA9052_SECOND_B_REG:
150 	case DA9052_SECOND_C_REG:
151 	case DA9052_SECOND_D_REG:
152 	case DA9052_PAGE1_CON_REG:
153 		return true;
154 	default:
155 		return false;
156 	}
157 }
158 
da9052_reg_writeable(struct device * dev,unsigned int reg)159 static bool da9052_reg_writeable(struct device *dev, unsigned int reg)
160 {
161 	switch (reg) {
162 	case DA9052_PAGE0_CON_REG:
163 	case DA9052_EVENT_A_REG:
164 	case DA9052_EVENT_B_REG:
165 	case DA9052_EVENT_C_REG:
166 	case DA9052_EVENT_D_REG:
167 	case DA9052_FAULTLOG_REG:
168 	case DA9052_IRQ_MASK_A_REG:
169 	case DA9052_IRQ_MASK_B_REG:
170 	case DA9052_IRQ_MASK_C_REG:
171 	case DA9052_IRQ_MASK_D_REG:
172 	case DA9052_CONTROL_A_REG:
173 	case DA9052_CONTROL_B_REG:
174 	case DA9052_CONTROL_C_REG:
175 	case DA9052_CONTROL_D_REG:
176 	case DA9052_PDDIS_REG:
177 	case DA9052_RESET_REG:
178 	case DA9052_GPIO_0_1_REG:
179 	case DA9052_GPIO_2_3_REG:
180 	case DA9052_GPIO_4_5_REG:
181 	case DA9052_GPIO_6_7_REG:
182 	case DA9052_GPIO_8_9_REG:
183 	case DA9052_GPIO_10_11_REG:
184 	case DA9052_GPIO_12_13_REG:
185 	case DA9052_GPIO_14_15_REG:
186 	case DA9052_ID_0_1_REG:
187 	case DA9052_ID_2_3_REG:
188 	case DA9052_ID_4_5_REG:
189 	case DA9052_ID_6_7_REG:
190 	case DA9052_ID_8_9_REG:
191 	case DA9052_ID_10_11_REG:
192 	case DA9052_ID_12_13_REG:
193 	case DA9052_ID_14_15_REG:
194 	case DA9052_ID_16_17_REG:
195 	case DA9052_ID_18_19_REG:
196 	case DA9052_ID_20_21_REG:
197 	case DA9052_SEQ_STATUS_REG:
198 	case DA9052_SEQ_A_REG:
199 	case DA9052_SEQ_B_REG:
200 	case DA9052_SEQ_TIMER_REG:
201 	case DA9052_BUCKA_REG:
202 	case DA9052_BUCKB_REG:
203 	case DA9052_BUCKCORE_REG:
204 	case DA9052_BUCKPRO_REG:
205 	case DA9052_BUCKMEM_REG:
206 	case DA9052_BUCKPERI_REG:
207 	case DA9052_LDO1_REG:
208 	case DA9052_LDO2_REG:
209 	case DA9052_LDO3_REG:
210 	case DA9052_LDO4_REG:
211 	case DA9052_LDO5_REG:
212 	case DA9052_LDO6_REG:
213 	case DA9052_LDO7_REG:
214 	case DA9052_LDO8_REG:
215 	case DA9052_LDO9_REG:
216 	case DA9052_LDO10_REG:
217 	case DA9052_SUPPLY_REG:
218 	case DA9052_PULLDOWN_REG:
219 	case DA9052_CHGBUCK_REG:
220 	case DA9052_WAITCONT_REG:
221 	case DA9052_ISET_REG:
222 	case DA9052_BATCHG_REG:
223 	case DA9052_CHG_CONT_REG:
224 	case DA9052_INPUT_CONT_REG:
225 	case DA9052_BBAT_CONT_REG:
226 	case DA9052_BOOST_REG:
227 	case DA9052_LED_CONT_REG:
228 	case DA9052_LEDMIN123_REG:
229 	case DA9052_LED1_CONF_REG:
230 	case DA9052_LED2_CONF_REG:
231 	case DA9052_LED3_CONF_REG:
232 	case DA9052_LED1CONT_REG:
233 	case DA9052_LED2CONT_REG:
234 	case DA9052_LED3CONT_REG:
235 	case DA9052_LED_CONT_4_REG:
236 	case DA9052_LED_CONT_5_REG:
237 	case DA9052_ADC_MAN_REG:
238 	case DA9052_ADC_CONT_REG:
239 	case DA9052_ADC_RES_L_REG:
240 	case DA9052_ADC_RES_H_REG:
241 	case DA9052_VDD_RES_REG:
242 	case DA9052_VDD_MON_REG:
243 	case DA9052_ICHG_THD_REG:
244 	case DA9052_ICHG_END_REG:
245 	case DA9052_TBAT_HIGHP_REG:
246 	case DA9052_TBAT_HIGHN_REG:
247 	case DA9052_TBAT_LOW_REG:
248 	case DA9052_T_OFFSET_REG:
249 	case DA9052_AUTO4_HIGH_REG:
250 	case DA9052_AUTO4_LOW_REG:
251 	case DA9052_AUTO5_HIGH_REG:
252 	case DA9052_AUTO5_LOW_REG:
253 	case DA9052_AUTO6_HIGH_REG:
254 	case DA9052_AUTO6_LOW_REG:
255 	case DA9052_TSI_CONT_A_REG:
256 	case DA9052_TSI_CONT_B_REG:
257 	case DA9052_COUNT_S_REG:
258 	case DA9052_COUNT_MI_REG:
259 	case DA9052_COUNT_H_REG:
260 	case DA9052_COUNT_D_REG:
261 	case DA9052_COUNT_MO_REG:
262 	case DA9052_COUNT_Y_REG:
263 	case DA9052_ALARM_MI_REG:
264 	case DA9052_ALARM_H_REG:
265 	case DA9052_ALARM_D_REG:
266 	case DA9052_ALARM_MO_REG:
267 	case DA9052_ALARM_Y_REG:
268 	case DA9052_PAGE1_CON_REG:
269 		return true;
270 	default:
271 		return false;
272 	}
273 }
274 
da9052_reg_volatile(struct device * dev,unsigned int reg)275 static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
276 {
277 	switch (reg) {
278 	case DA9052_STATUS_A_REG:
279 	case DA9052_STATUS_B_REG:
280 	case DA9052_STATUS_C_REG:
281 	case DA9052_STATUS_D_REG:
282 	case DA9052_EVENT_A_REG:
283 	case DA9052_EVENT_B_REG:
284 	case DA9052_EVENT_C_REG:
285 	case DA9052_EVENT_D_REG:
286 	case DA9052_CONTROL_B_REG:
287 	case DA9052_CONTROL_D_REG:
288 	case DA9052_SUPPLY_REG:
289 	case DA9052_FAULTLOG_REG:
290 	case DA9052_CHG_TIME_REG:
291 	case DA9052_ADC_RES_L_REG:
292 	case DA9052_ADC_RES_H_REG:
293 	case DA9052_VDD_RES_REG:
294 	case DA9052_ICHG_AV_REG:
295 	case DA9052_TBAT_RES_REG:
296 	case DA9052_ADCIN4_RES_REG:
297 	case DA9052_ADCIN5_RES_REG:
298 	case DA9052_ADCIN6_RES_REG:
299 	case DA9052_TJUNC_RES_REG:
300 	case DA9052_TSI_X_MSB_REG:
301 	case DA9052_TSI_Y_MSB_REG:
302 	case DA9052_TSI_LSB_REG:
303 	case DA9052_TSI_Z_MSB_REG:
304 	case DA9052_COUNT_S_REG:
305 	case DA9052_COUNT_MI_REG:
306 	case DA9052_COUNT_H_REG:
307 	case DA9052_COUNT_D_REG:
308 	case DA9052_COUNT_MO_REG:
309 	case DA9052_COUNT_Y_REG:
310 	case DA9052_ALARM_MI_REG:
311 		return true;
312 	default:
313 		return false;
314 	}
315 }
316 
317 /*
318  * TBAT look-up table is computed from the R90 reg (8 bit register)
319  * reading as below. The battery temperature is in milliCentigrade
320  * TBAT = (1/(t1+1/298) - 273) * 1000 mC
321  * where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
322  * Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
323  * Example:
324  * R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
325  * TBAT = 20015 mili degrees Centrigrade
326  *
327 */
328 static const int32_t tbat_lookup[255] = {
329 	183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
330 	78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
331 	570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
332 	45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
333 	36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
334 	30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
335 	26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
336 	22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
337 	18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
338 	15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
339 	13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
340 	11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
341 	9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
342 	7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
343 	5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
344 	3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
345 	2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
346 	1171, 1009, 849, 690, 532, 376, 221, 67,
347 	-84, -236, -386, -535, -683, -830, -975, -1119,
348 	-1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
349 	-2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
350 	-3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
351 	-4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
352 	-5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
353 	-6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
354 	-7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
355 	-7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
356 	-8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
357 	-9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
358 	-10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
359 	-11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
360 	-11823, -11903, -11982
361 };
362 
363 static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
364 	[DA9052_ADC_VDDOUT]	= DA9052_ADC_MAN_MUXSEL_VDDOUT,
365 	[DA9052_ADC_ICH]	= DA9052_ADC_MAN_MUXSEL_ICH,
366 	[DA9052_ADC_TBAT]	= DA9052_ADC_MAN_MUXSEL_TBAT,
367 	[DA9052_ADC_VBAT]	= DA9052_ADC_MAN_MUXSEL_VBAT,
368 	[DA9052_ADC_IN4]	= DA9052_ADC_MAN_MUXSEL_AD4,
369 	[DA9052_ADC_IN5]	= DA9052_ADC_MAN_MUXSEL_AD5,
370 	[DA9052_ADC_IN6]	= DA9052_ADC_MAN_MUXSEL_AD6,
371 	[DA9052_ADC_VBBAT]	= DA9052_ADC_MAN_MUXSEL_VBBAT
372 };
373 
da9052_adc_manual_read(struct da9052 * da9052,unsigned char channel)374 int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
375 {
376 	int ret;
377 	unsigned short calc_data;
378 	unsigned short data;
379 	unsigned char mux_sel;
380 
381 	if (channel > DA9052_ADC_VBBAT)
382 		return -EINVAL;
383 
384 	mutex_lock(&da9052->auxadc_lock);
385 
386 	reinit_completion(&da9052->done);
387 
388 	/* Channel gets activated on enabling the Conversion bit */
389 	mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
390 
391 	ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
392 	if (ret < 0)
393 		goto err;
394 
395 	/* Wait for an interrupt */
396 	if (!wait_for_completion_timeout(&da9052->done,
397 					 msecs_to_jiffies(500))) {
398 		dev_err(da9052->dev,
399 			"timeout waiting for ADC conversion interrupt\n");
400 		ret = -ETIMEDOUT;
401 		goto err;
402 	}
403 
404 	ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
405 	if (ret < 0)
406 		goto err;
407 
408 	calc_data = (unsigned short)ret;
409 	data = calc_data << 2;
410 
411 	ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
412 	if (ret < 0)
413 		goto err;
414 
415 	calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
416 	data |= calc_data;
417 
418 	ret = data;
419 
420 err:
421 	mutex_unlock(&da9052->auxadc_lock);
422 	return ret;
423 }
424 EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
425 
da9052_adc_read_temp(struct da9052 * da9052)426 int da9052_adc_read_temp(struct da9052 *da9052)
427 {
428 	int tbat;
429 
430 	tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
431 	if (tbat <= 0)
432 		return tbat;
433 
434 	/* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
435 	return tbat_lookup[tbat - 1];
436 }
437 EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
438 
439 static const struct mfd_cell da9052_subdev_info[] = {
440 	{
441 		.name = "da9052-regulator",
442 		.id = 0,
443 	},
444 	{
445 		.name = "da9052-regulator",
446 		.id = 1,
447 	},
448 	{
449 		.name = "da9052-regulator",
450 		.id = 2,
451 	},
452 	{
453 		.name = "da9052-regulator",
454 		.id = 3,
455 	},
456 	{
457 		.name = "da9052-regulator",
458 		.id = 4,
459 	},
460 	{
461 		.name = "da9052-regulator",
462 		.id = 5,
463 	},
464 	{
465 		.name = "da9052-regulator",
466 		.id = 6,
467 	},
468 	{
469 		.name = "da9052-regulator",
470 		.id = 7,
471 	},
472 	{
473 		.name = "da9052-regulator",
474 		.id = 8,
475 	},
476 	{
477 		.name = "da9052-regulator",
478 		.id = 9,
479 	},
480 	{
481 		.name = "da9052-regulator",
482 		.id = 10,
483 	},
484 	{
485 		.name = "da9052-regulator",
486 		.id = 11,
487 	},
488 	{
489 		.name = "da9052-regulator",
490 		.id = 12,
491 	},
492 	{
493 		.name = "da9052-regulator",
494 		.id = 13,
495 	},
496 	{
497 		.name = "da9052-onkey",
498 	},
499 	{
500 		.name = "da9052-rtc",
501 	},
502 	{
503 		.name = "da9052-gpio",
504 	},
505 	{
506 		.name = "da9052-hwmon",
507 	},
508 	{
509 		.name = "da9052-leds",
510 	},
511 	{
512 		.name = "da9052-wled1",
513 	},
514 	{
515 		.name = "da9052-wled2",
516 	},
517 	{
518 		.name = "da9052-wled3",
519 	},
520 	{
521 		.name = "da9052-bat",
522 	},
523 	{
524 		.name = "da9052-watchdog",
525 	},
526 };
527 
528 static const struct mfd_cell da9052_tsi_subdev_info[] = {
529 	{ .name = "da9052-tsi" },
530 };
531 
532 const struct regmap_config da9052_regmap_config = {
533 	.reg_bits = 8,
534 	.val_bits = 8,
535 
536 	.cache_type = REGCACHE_RBTREE,
537 
538 	.max_register = DA9052_PAGE1_CON_REG,
539 	.readable_reg = da9052_reg_readable,
540 	.writeable_reg = da9052_reg_writeable,
541 	.volatile_reg = da9052_reg_volatile,
542 };
543 EXPORT_SYMBOL_GPL(da9052_regmap_config);
544 
da9052_clear_fault_log(struct da9052 * da9052)545 static int da9052_clear_fault_log(struct da9052 *da9052)
546 {
547 	int ret = 0;
548 	int fault_log = 0;
549 
550 	fault_log = da9052_reg_read(da9052, DA9052_FAULTLOG_REG);
551 	if (fault_log < 0) {
552 		dev_err(da9052->dev,
553 			"Cannot read FAULT_LOG %d\n", fault_log);
554 		return fault_log;
555 	}
556 
557 	if (fault_log) {
558 		if (fault_log & DA9052_FAULTLOG_TWDERROR)
559 			dev_dbg(da9052->dev,
560 				"Fault log entry detected: TWD_ERROR\n");
561 		if (fault_log & DA9052_FAULTLOG_VDDFAULT)
562 			dev_dbg(da9052->dev,
563 				"Fault log entry detected: VDD_FAULT\n");
564 		if (fault_log & DA9052_FAULTLOG_VDDSTART)
565 			dev_dbg(da9052->dev,
566 				"Fault log entry detected: VDD_START\n");
567 		if (fault_log & DA9052_FAULTLOG_TEMPOVER)
568 			dev_dbg(da9052->dev,
569 				"Fault log entry detected: TEMP_OVER\n");
570 		if (fault_log & DA9052_FAULTLOG_KEYSHUT)
571 			dev_dbg(da9052->dev,
572 				"Fault log entry detected: KEY_SHUT\n");
573 		if (fault_log & DA9052_FAULTLOG_NSDSET)
574 			dev_dbg(da9052->dev,
575 				"Fault log entry detected: nSD_SHUT\n");
576 		if (fault_log & DA9052_FAULTLOG_WAITSET)
577 			dev_dbg(da9052->dev,
578 				"Fault log entry detected: WAIT_SHUT\n");
579 
580 		ret = da9052_reg_write(da9052,
581 					DA9052_FAULTLOG_REG,
582 					0xFF);
583 		if (ret < 0)
584 			dev_err(da9052->dev,
585 				"Cannot reset FAULT_LOG values %d\n", ret);
586 	}
587 
588 	return ret;
589 }
590 
da9052_device_init(struct da9052 * da9052,u8 chip_id)591 int da9052_device_init(struct da9052 *da9052, u8 chip_id)
592 {
593 	struct da9052_pdata *pdata = dev_get_platdata(da9052->dev);
594 	int ret;
595 
596 	mutex_init(&da9052->auxadc_lock);
597 	init_completion(&da9052->done);
598 
599 	ret = da9052_clear_fault_log(da9052);
600 	if (ret < 0)
601 		dev_warn(da9052->dev, "Cannot clear FAULT_LOG\n");
602 
603 	if (pdata && pdata->init != NULL)
604 		pdata->init(da9052);
605 
606 	da9052->chip_id = chip_id;
607 
608 	ret = da9052_irq_init(da9052);
609 	if (ret != 0) {
610 		dev_err(da9052->dev, "da9052_irq_init failed: %d\n", ret);
611 		return ret;
612 	}
613 
614 	ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
615 			      da9052_subdev_info,
616 			      ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
617 	if (ret) {
618 		dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret);
619 		goto err;
620 	}
621 
622 	/*
623 	 * Check if touchscreen pins are used are analogue input instead
624 	 * of having a touchscreen connected to them. The analogue input
625 	 * functionality will be provided by hwmon driver (if enabled).
626 	 */
627 	if (!device_property_read_bool(da9052->dev, "dlg,tsi-as-adc")) {
628 		ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
629 				      da9052_tsi_subdev_info,
630 				      ARRAY_SIZE(da9052_tsi_subdev_info),
631 				      NULL, 0, NULL);
632 		if (ret) {
633 			dev_err(da9052->dev, "failed to add TSI subdev: %d\n",
634 				ret);
635 			goto err;
636 		}
637 	}
638 
639 	return 0;
640 
641 err:
642 	mfd_remove_devices(da9052->dev);
643 	da9052_irq_exit(da9052);
644 
645 	return ret;
646 }
647 
da9052_device_exit(struct da9052 * da9052)648 void da9052_device_exit(struct da9052 *da9052)
649 {
650 	mfd_remove_devices(da9052->dev);
651 	da9052_irq_exit(da9052);
652 }
653 
654 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
655 MODULE_DESCRIPTION("DA9052 MFD Core");
656