xref: /openbmc/linux/drivers/power/supply/bq25980_charger.c (revision 2612e3bbc0386368a850140a6c9b990cd496a5ec)
1  // SPDX-License-Identifier: GPL-2.0
2  // BQ25980 Battery Charger Driver
3  // Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
4  
5  #include <linux/err.h>
6  #include <linux/i2c.h>
7  #include <linux/init.h>
8  #include <linux/interrupt.h>
9  #include <linux/kernel.h>
10  #include <linux/module.h>
11  #include <linux/gpio/consumer.h>
12  #include <linux/power_supply.h>
13  #include <linux/regmap.h>
14  #include <linux/types.h>
15  #include <linux/delay.h>
16  #include <linux/device.h>
17  #include <linux/moduleparam.h>
18  #include <linux/slab.h>
19  
20  #include "bq25980_charger.h"
21  
22  struct bq25980_state {
23  	bool dischg;
24  	bool ovp;
25  	bool ocp;
26  	bool wdt;
27  	bool tflt;
28  	bool online;
29  	bool ce;
30  	bool hiz;
31  	bool bypass;
32  
33  	u32 vbat_adc;
34  	u32 vsys_adc;
35  	u32 ibat_adc;
36  };
37  
38  enum bq25980_id {
39  	BQ25980,
40  	BQ25975,
41  	BQ25960,
42  };
43  
44  struct bq25980_chip_info {
45  
46  	int model_id;
47  
48  	const struct regmap_config *regmap_config;
49  
50  	int busocp_def;
51  	int busocp_sc_max;
52  	int busocp_byp_max;
53  	int busocp_sc_min;
54  	int busocp_byp_min;
55  
56  	int busovp_sc_def;
57  	int busovp_byp_def;
58  	int busovp_sc_step;
59  
60  	int busovp_sc_offset;
61  	int busovp_byp_step;
62  	int busovp_byp_offset;
63  	int busovp_sc_min;
64  	int busovp_sc_max;
65  	int busovp_byp_min;
66  	int busovp_byp_max;
67  
68  	int batovp_def;
69  	int batovp_max;
70  	int batovp_min;
71  	int batovp_step;
72  	int batovp_offset;
73  
74  	int batocp_def;
75  	int batocp_max;
76  };
77  
78  struct bq25980_init_data {
79  	u32 ichg;
80  	u32 bypass_ilim;
81  	u32 sc_ilim;
82  	u32 vreg;
83  	u32 iterm;
84  	u32 iprechg;
85  	u32 bypass_vlim;
86  	u32 sc_vlim;
87  	u32 ichg_max;
88  	u32 vreg_max;
89  };
90  
91  struct bq25980_device {
92  	struct i2c_client *client;
93  	struct device *dev;
94  	struct power_supply *charger;
95  	struct power_supply *battery;
96  	struct mutex lock;
97  	struct regmap *regmap;
98  
99  	char model_name[I2C_NAME_SIZE];
100  
101  	struct bq25980_init_data init_data;
102  	const struct bq25980_chip_info *chip_info;
103  	struct bq25980_state state;
104  	int watchdog_timer;
105  };
106  
107  static struct reg_default bq25980_reg_defs[] = {
108  	{BQ25980_BATOVP, 0x5A},
109  	{BQ25980_BATOVP_ALM, 0x46},
110  	{BQ25980_BATOCP, 0x51},
111  	{BQ25980_BATOCP_ALM, 0x50},
112  	{BQ25980_BATUCP_ALM, 0x28},
113  	{BQ25980_CHRGR_CTRL_1, 0x0},
114  	{BQ25980_BUSOVP, 0x26},
115  	{BQ25980_BUSOVP_ALM, 0x22},
116  	{BQ25980_BUSOCP, 0xD},
117  	{BQ25980_BUSOCP_ALM, 0xC},
118  	{BQ25980_TEMP_CONTROL, 0x30},
119  	{BQ25980_TDIE_ALM, 0xC8},
120  	{BQ25980_TSBUS_FLT, 0x15},
121  	{BQ25980_TSBAT_FLG, 0x15},
122  	{BQ25980_VAC_CONTROL, 0x0},
123  	{BQ25980_CHRGR_CTRL_2, 0x0},
124  	{BQ25980_CHRGR_CTRL_3, 0x20},
125  	{BQ25980_CHRGR_CTRL_4, 0x1D},
126  	{BQ25980_CHRGR_CTRL_5, 0x18},
127  	{BQ25980_STAT1, 0x0},
128  	{BQ25980_STAT2, 0x0},
129  	{BQ25980_STAT3, 0x0},
130  	{BQ25980_STAT4, 0x0},
131  	{BQ25980_STAT5, 0x0},
132  	{BQ25980_FLAG1, 0x0},
133  	{BQ25980_FLAG2, 0x0},
134  	{BQ25980_FLAG3, 0x0},
135  	{BQ25980_FLAG4, 0x0},
136  	{BQ25980_FLAG5, 0x0},
137  	{BQ25980_MASK1, 0x0},
138  	{BQ25980_MASK2, 0x0},
139  	{BQ25980_MASK3, 0x0},
140  	{BQ25980_MASK4, 0x0},
141  	{BQ25980_MASK5, 0x0},
142  	{BQ25980_DEVICE_INFO, 0x8},
143  	{BQ25980_ADC_CONTROL1, 0x0},
144  	{BQ25980_ADC_CONTROL2, 0x0},
145  	{BQ25980_IBUS_ADC_LSB, 0x0},
146  	{BQ25980_IBUS_ADC_MSB, 0x0},
147  	{BQ25980_VBUS_ADC_LSB, 0x0},
148  	{BQ25980_VBUS_ADC_MSB, 0x0},
149  	{BQ25980_VAC1_ADC_LSB, 0x0},
150  	{BQ25980_VAC2_ADC_LSB, 0x0},
151  	{BQ25980_VOUT_ADC_LSB, 0x0},
152  	{BQ25980_VBAT_ADC_LSB, 0x0},
153  	{BQ25980_IBAT_ADC_MSB, 0x0},
154  	{BQ25980_IBAT_ADC_LSB, 0x0},
155  	{BQ25980_TSBUS_ADC_LSB, 0x0},
156  	{BQ25980_TSBAT_ADC_LSB, 0x0},
157  	{BQ25980_TDIE_ADC_LSB, 0x0},
158  	{BQ25980_DEGLITCH_TIME, 0x0},
159  	{BQ25980_CHRGR_CTRL_6, 0x0},
160  };
161  
162  static struct reg_default bq25975_reg_defs[] = {
163  	{BQ25980_BATOVP, 0x5A},
164  	{BQ25980_BATOVP_ALM, 0x46},
165  	{BQ25980_BATOCP, 0x51},
166  	{BQ25980_BATOCP_ALM, 0x50},
167  	{BQ25980_BATUCP_ALM, 0x28},
168  	{BQ25980_CHRGR_CTRL_1, 0x0},
169  	{BQ25980_BUSOVP, 0x26},
170  	{BQ25980_BUSOVP_ALM, 0x22},
171  	{BQ25980_BUSOCP, 0xD},
172  	{BQ25980_BUSOCP_ALM, 0xC},
173  	{BQ25980_TEMP_CONTROL, 0x30},
174  	{BQ25980_TDIE_ALM, 0xC8},
175  	{BQ25980_TSBUS_FLT, 0x15},
176  	{BQ25980_TSBAT_FLG, 0x15},
177  	{BQ25980_VAC_CONTROL, 0x0},
178  	{BQ25980_CHRGR_CTRL_2, 0x0},
179  	{BQ25980_CHRGR_CTRL_3, 0x20},
180  	{BQ25980_CHRGR_CTRL_4, 0x1D},
181  	{BQ25980_CHRGR_CTRL_5, 0x18},
182  	{BQ25980_STAT1, 0x0},
183  	{BQ25980_STAT2, 0x0},
184  	{BQ25980_STAT3, 0x0},
185  	{BQ25980_STAT4, 0x0},
186  	{BQ25980_STAT5, 0x0},
187  	{BQ25980_FLAG1, 0x0},
188  	{BQ25980_FLAG2, 0x0},
189  	{BQ25980_FLAG3, 0x0},
190  	{BQ25980_FLAG4, 0x0},
191  	{BQ25980_FLAG5, 0x0},
192  	{BQ25980_MASK1, 0x0},
193  	{BQ25980_MASK2, 0x0},
194  	{BQ25980_MASK3, 0x0},
195  	{BQ25980_MASK4, 0x0},
196  	{BQ25980_MASK5, 0x0},
197  	{BQ25980_DEVICE_INFO, 0x8},
198  	{BQ25980_ADC_CONTROL1, 0x0},
199  	{BQ25980_ADC_CONTROL2, 0x0},
200  	{BQ25980_IBUS_ADC_LSB, 0x0},
201  	{BQ25980_IBUS_ADC_MSB, 0x0},
202  	{BQ25980_VBUS_ADC_LSB, 0x0},
203  	{BQ25980_VBUS_ADC_MSB, 0x0},
204  	{BQ25980_VAC1_ADC_LSB, 0x0},
205  	{BQ25980_VAC2_ADC_LSB, 0x0},
206  	{BQ25980_VOUT_ADC_LSB, 0x0},
207  	{BQ25980_VBAT_ADC_LSB, 0x0},
208  	{BQ25980_IBAT_ADC_MSB, 0x0},
209  	{BQ25980_IBAT_ADC_LSB, 0x0},
210  	{BQ25980_TSBUS_ADC_LSB, 0x0},
211  	{BQ25980_TSBAT_ADC_LSB, 0x0},
212  	{BQ25980_TDIE_ADC_LSB, 0x0},
213  	{BQ25980_DEGLITCH_TIME, 0x0},
214  	{BQ25980_CHRGR_CTRL_6, 0x0},
215  };
216  
217  static struct reg_default bq25960_reg_defs[] = {
218  	{BQ25980_BATOVP, 0x5A},
219  	{BQ25980_BATOVP_ALM, 0x46},
220  	{BQ25980_BATOCP, 0x51},
221  	{BQ25980_BATOCP_ALM, 0x50},
222  	{BQ25980_BATUCP_ALM, 0x28},
223  	{BQ25980_CHRGR_CTRL_1, 0x0},
224  	{BQ25980_BUSOVP, 0x26},
225  	{BQ25980_BUSOVP_ALM, 0x22},
226  	{BQ25980_BUSOCP, 0xD},
227  	{BQ25980_BUSOCP_ALM, 0xC},
228  	{BQ25980_TEMP_CONTROL, 0x30},
229  	{BQ25980_TDIE_ALM, 0xC8},
230  	{BQ25980_TSBUS_FLT, 0x15},
231  	{BQ25980_TSBAT_FLG, 0x15},
232  	{BQ25980_VAC_CONTROL, 0x0},
233  	{BQ25980_CHRGR_CTRL_2, 0x0},
234  	{BQ25980_CHRGR_CTRL_3, 0x20},
235  	{BQ25980_CHRGR_CTRL_4, 0x1D},
236  	{BQ25980_CHRGR_CTRL_5, 0x18},
237  	{BQ25980_STAT1, 0x0},
238  	{BQ25980_STAT2, 0x0},
239  	{BQ25980_STAT3, 0x0},
240  	{BQ25980_STAT4, 0x0},
241  	{BQ25980_STAT5, 0x0},
242  	{BQ25980_FLAG1, 0x0},
243  	{BQ25980_FLAG2, 0x0},
244  	{BQ25980_FLAG3, 0x0},
245  	{BQ25980_FLAG4, 0x0},
246  	{BQ25980_FLAG5, 0x0},
247  	{BQ25980_MASK1, 0x0},
248  	{BQ25980_MASK2, 0x0},
249  	{BQ25980_MASK3, 0x0},
250  	{BQ25980_MASK4, 0x0},
251  	{BQ25980_MASK5, 0x0},
252  	{BQ25980_DEVICE_INFO, 0x8},
253  	{BQ25980_ADC_CONTROL1, 0x0},
254  	{BQ25980_ADC_CONTROL2, 0x0},
255  	{BQ25980_IBUS_ADC_LSB, 0x0},
256  	{BQ25980_IBUS_ADC_MSB, 0x0},
257  	{BQ25980_VBUS_ADC_LSB, 0x0},
258  	{BQ25980_VBUS_ADC_MSB, 0x0},
259  	{BQ25980_VAC1_ADC_LSB, 0x0},
260  	{BQ25980_VAC2_ADC_LSB, 0x0},
261  	{BQ25980_VOUT_ADC_LSB, 0x0},
262  	{BQ25980_VBAT_ADC_LSB, 0x0},
263  	{BQ25980_IBAT_ADC_MSB, 0x0},
264  	{BQ25980_IBAT_ADC_LSB, 0x0},
265  	{BQ25980_TSBUS_ADC_LSB, 0x0},
266  	{BQ25980_TSBAT_ADC_LSB, 0x0},
267  	{BQ25980_TDIE_ADC_LSB, 0x0},
268  	{BQ25980_DEGLITCH_TIME, 0x0},
269  	{BQ25980_CHRGR_CTRL_6, 0x0},
270  };
271  
272  static int bq25980_watchdog_time[BQ25980_NUM_WD_VAL] = {5000, 10000, 50000,
273  							300000};
274  
bq25980_get_input_curr_lim(struct bq25980_device * bq)275  static int bq25980_get_input_curr_lim(struct bq25980_device *bq)
276  {
277  	unsigned int busocp_reg_code;
278  	int ret;
279  
280  	ret = regmap_read(bq->regmap, BQ25980_BUSOCP, &busocp_reg_code);
281  	if (ret)
282  		return ret;
283  
284  	return (busocp_reg_code * BQ25980_BUSOCP_STEP_uA) + BQ25980_BUSOCP_OFFSET_uA;
285  }
286  
bq25980_set_hiz(struct bq25980_device * bq,int setting)287  static int bq25980_set_hiz(struct bq25980_device *bq, int setting)
288  {
289  	return regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
290  			BQ25980_EN_HIZ, setting);
291  }
292  
bq25980_set_input_curr_lim(struct bq25980_device * bq,int busocp)293  static int bq25980_set_input_curr_lim(struct bq25980_device *bq, int busocp)
294  {
295  	unsigned int busocp_reg_code;
296  	int ret;
297  
298  	if (!busocp)
299  		return bq25980_set_hiz(bq, BQ25980_ENABLE_HIZ);
300  
301  	bq25980_set_hiz(bq, BQ25980_DISABLE_HIZ);
302  
303  	if (busocp < BQ25980_BUSOCP_MIN_uA)
304  		busocp = BQ25980_BUSOCP_MIN_uA;
305  
306  	if (bq->state.bypass)
307  		busocp = min(busocp, bq->chip_info->busocp_sc_max);
308  	else
309  		busocp = min(busocp, bq->chip_info->busocp_byp_max);
310  
311  	busocp_reg_code = (busocp - BQ25980_BUSOCP_OFFSET_uA)
312  						/ BQ25980_BUSOCP_STEP_uA;
313  
314  	ret = regmap_write(bq->regmap, BQ25980_BUSOCP, busocp_reg_code);
315  	if (ret)
316  		return ret;
317  
318  	return regmap_write(bq->regmap, BQ25980_BUSOCP_ALM, busocp_reg_code);
319  }
320  
bq25980_get_input_volt_lim(struct bq25980_device * bq)321  static int bq25980_get_input_volt_lim(struct bq25980_device *bq)
322  {
323  	unsigned int busovp_reg_code;
324  	unsigned int busovp_offset;
325  	unsigned int busovp_step;
326  	int ret;
327  
328  	if (bq->state.bypass) {
329  		busovp_step = bq->chip_info->busovp_byp_step;
330  		busovp_offset = bq->chip_info->busovp_byp_offset;
331  	} else {
332  		busovp_step = bq->chip_info->busovp_sc_step;
333  		busovp_offset = bq->chip_info->busovp_sc_offset;
334  	}
335  
336  	ret = regmap_read(bq->regmap, BQ25980_BUSOVP, &busovp_reg_code);
337  	if (ret)
338  		return ret;
339  
340  	return (busovp_reg_code * busovp_step) + busovp_offset;
341  }
342  
bq25980_set_input_volt_lim(struct bq25980_device * bq,int busovp)343  static int bq25980_set_input_volt_lim(struct bq25980_device *bq, int busovp)
344  {
345  	unsigned int busovp_reg_code;
346  	unsigned int busovp_step;
347  	unsigned int busovp_offset;
348  	int ret;
349  
350  	if (bq->state.bypass) {
351  		busovp_step = bq->chip_info->busovp_byp_step;
352  		busovp_offset = bq->chip_info->busovp_byp_offset;
353  		if (busovp > bq->chip_info->busovp_byp_max)
354  			busovp = bq->chip_info->busovp_byp_max;
355  		else if (busovp < bq->chip_info->busovp_byp_min)
356  			busovp = bq->chip_info->busovp_byp_min;
357  	} else {
358  		busovp_step = bq->chip_info->busovp_sc_step;
359  		busovp_offset = bq->chip_info->busovp_sc_offset;
360  		if (busovp > bq->chip_info->busovp_sc_max)
361  			busovp = bq->chip_info->busovp_sc_max;
362  		else if (busovp < bq->chip_info->busovp_sc_min)
363  			busovp = bq->chip_info->busovp_sc_min;
364  	}
365  
366  	busovp_reg_code = (busovp - busovp_offset) / busovp_step;
367  
368  	ret = regmap_write(bq->regmap, BQ25980_BUSOVP, busovp_reg_code);
369  	if (ret)
370  		return ret;
371  
372  	return regmap_write(bq->regmap, BQ25980_BUSOVP_ALM, busovp_reg_code);
373  }
374  
bq25980_get_const_charge_curr(struct bq25980_device * bq)375  static int bq25980_get_const_charge_curr(struct bq25980_device *bq)
376  {
377  	unsigned int batocp_reg_code;
378  	int ret;
379  
380  	ret = regmap_read(bq->regmap, BQ25980_BATOCP, &batocp_reg_code);
381  	if (ret)
382  		return ret;
383  
384  	return (batocp_reg_code & BQ25980_BATOCP_MASK) *
385  						BQ25980_BATOCP_STEP_uA;
386  }
387  
bq25980_set_const_charge_curr(struct bq25980_device * bq,int batocp)388  static int bq25980_set_const_charge_curr(struct bq25980_device *bq, int batocp)
389  {
390  	unsigned int batocp_reg_code;
391  	int ret;
392  
393  	batocp = max(batocp, BQ25980_BATOCP_MIN_uA);
394  	batocp = min(batocp, bq->chip_info->batocp_max);
395  
396  	batocp_reg_code = batocp / BQ25980_BATOCP_STEP_uA;
397  
398  	ret = regmap_update_bits(bq->regmap, BQ25980_BATOCP,
399  				BQ25980_BATOCP_MASK, batocp_reg_code);
400  	if (ret)
401  		return ret;
402  
403  	return regmap_update_bits(bq->regmap, BQ25980_BATOCP_ALM,
404  				BQ25980_BATOCP_MASK, batocp_reg_code);
405  }
406  
bq25980_get_const_charge_volt(struct bq25980_device * bq)407  static int bq25980_get_const_charge_volt(struct bq25980_device *bq)
408  {
409  	unsigned int batovp_reg_code;
410  	int ret;
411  
412  	ret = regmap_read(bq->regmap, BQ25980_BATOVP, &batovp_reg_code);
413  	if (ret)
414  		return ret;
415  
416  	return ((batovp_reg_code * bq->chip_info->batovp_step) +
417  			bq->chip_info->batovp_offset);
418  }
419  
bq25980_set_const_charge_volt(struct bq25980_device * bq,int batovp)420  static int bq25980_set_const_charge_volt(struct bq25980_device *bq, int batovp)
421  {
422  	unsigned int batovp_reg_code;
423  	int ret;
424  
425  	if (batovp < bq->chip_info->batovp_min)
426  		batovp = bq->chip_info->batovp_min;
427  
428  	if (batovp > bq->chip_info->batovp_max)
429  		batovp = bq->chip_info->batovp_max;
430  
431  	batovp_reg_code = (batovp - bq->chip_info->batovp_offset) /
432  						bq->chip_info->batovp_step;
433  
434  	ret = regmap_write(bq->regmap, BQ25980_BATOVP, batovp_reg_code);
435  	if (ret)
436  		return ret;
437  
438  	return regmap_write(bq->regmap, BQ25980_BATOVP_ALM, batovp_reg_code);
439  }
440  
bq25980_set_bypass(struct bq25980_device * bq,bool en_bypass)441  static int bq25980_set_bypass(struct bq25980_device *bq, bool en_bypass)
442  {
443  	int ret;
444  
445  	if (en_bypass)
446  		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
447  					BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
448  	else
449  		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
450  					BQ25980_EN_BYPASS, en_bypass);
451  	if (ret)
452  		return ret;
453  
454  	bq->state.bypass = en_bypass;
455  
456  	return bq->state.bypass;
457  }
458  
bq25980_set_chg_en(struct bq25980_device * bq,bool en_chg)459  static int bq25980_set_chg_en(struct bq25980_device *bq, bool en_chg)
460  {
461  	int ret;
462  
463  	if (en_chg)
464  		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
465  					BQ25980_CHG_EN, BQ25980_CHG_EN);
466  	else
467  		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
468  					BQ25980_CHG_EN, en_chg);
469  	if (ret)
470  		return ret;
471  
472  	bq->state.ce = en_chg;
473  
474  	return 0;
475  }
476  
bq25980_get_adc_ibus(struct bq25980_device * bq)477  static int bq25980_get_adc_ibus(struct bq25980_device *bq)
478  {
479  	int ibus_adc_lsb, ibus_adc_msb;
480  	u16 ibus_adc;
481  	int ret;
482  
483  	ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_MSB, &ibus_adc_msb);
484  	if (ret)
485  		return ret;
486  
487  	ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_LSB, &ibus_adc_lsb);
488  	if (ret)
489  		return ret;
490  
491  	ibus_adc = (ibus_adc_msb << 8) | ibus_adc_lsb;
492  
493  	if (ibus_adc_msb & BQ25980_ADC_POLARITY_BIT)
494  		return ((ibus_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
495  
496  	return ibus_adc * BQ25980_ADC_CURR_STEP_uA;
497  }
498  
bq25980_get_adc_vbus(struct bq25980_device * bq)499  static int bq25980_get_adc_vbus(struct bq25980_device *bq)
500  {
501  	int vbus_adc_lsb, vbus_adc_msb;
502  	u16 vbus_adc;
503  	int ret;
504  
505  	ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_MSB, &vbus_adc_msb);
506  	if (ret)
507  		return ret;
508  
509  	ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_LSB, &vbus_adc_lsb);
510  	if (ret)
511  		return ret;
512  
513  	vbus_adc = (vbus_adc_msb << 8) | vbus_adc_lsb;
514  
515  	return vbus_adc * BQ25980_ADC_VOLT_STEP_uV;
516  }
517  
bq25980_get_ibat_adc(struct bq25980_device * bq)518  static int bq25980_get_ibat_adc(struct bq25980_device *bq)
519  {
520  	int ret;
521  	int ibat_adc_lsb, ibat_adc_msb;
522  	int ibat_adc;
523  
524  	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
525  	if (ret)
526  		return ret;
527  
528  	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_LSB, &ibat_adc_lsb);
529  	if (ret)
530  		return ret;
531  
532  	ibat_adc = (ibat_adc_msb << 8) | ibat_adc_lsb;
533  
534  	if (ibat_adc_msb & BQ25980_ADC_POLARITY_BIT)
535  		return ((ibat_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
536  
537  	return ibat_adc * BQ25980_ADC_CURR_STEP_uA;
538  }
539  
bq25980_get_adc_vbat(struct bq25980_device * bq)540  static int bq25980_get_adc_vbat(struct bq25980_device *bq)
541  {
542  	int vsys_adc_lsb, vsys_adc_msb;
543  	u16 vsys_adc;
544  	int ret;
545  
546  	ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_MSB, &vsys_adc_msb);
547  	if (ret)
548  		return ret;
549  
550  	ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_LSB, &vsys_adc_lsb);
551  	if (ret)
552  		return ret;
553  
554  	vsys_adc = (vsys_adc_msb << 8) | vsys_adc_lsb;
555  
556  	return vsys_adc * BQ25980_ADC_VOLT_STEP_uV;
557  }
558  
bq25980_get_state(struct bq25980_device * bq,struct bq25980_state * state)559  static int bq25980_get_state(struct bq25980_device *bq,
560  				struct bq25980_state *state)
561  {
562  	unsigned int chg_ctrl_2;
563  	unsigned int stat1;
564  	unsigned int stat2;
565  	unsigned int stat3;
566  	unsigned int stat4;
567  	unsigned int ibat_adc_msb;
568  	int ret;
569  
570  	ret = regmap_read(bq->regmap, BQ25980_STAT1, &stat1);
571  	if (ret)
572  		return ret;
573  
574  	ret = regmap_read(bq->regmap, BQ25980_STAT2, &stat2);
575  	if (ret)
576  		return ret;
577  
578  	ret = regmap_read(bq->regmap, BQ25980_STAT3, &stat3);
579  	if (ret)
580  		return ret;
581  
582  	ret = regmap_read(bq->regmap, BQ25980_STAT4, &stat4);
583  	if (ret)
584  		return ret;
585  
586  	ret = regmap_read(bq->regmap, BQ25980_CHRGR_CTRL_2, &chg_ctrl_2);
587  	if (ret)
588  		return ret;
589  
590  	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
591  	if (ret)
592  		return ret;
593  
594  	state->dischg = ibat_adc_msb & BQ25980_ADC_POLARITY_BIT;
595  	state->ovp = (stat1 & BQ25980_STAT1_OVP_MASK) |
596  		(stat3 & BQ25980_STAT3_OVP_MASK);
597  	state->ocp = (stat1 & BQ25980_STAT1_OCP_MASK) |
598  		(stat2 & BQ25980_STAT2_OCP_MASK);
599  	state->tflt = stat4 & BQ25980_STAT4_TFLT_MASK;
600  	state->wdt = stat4 & BQ25980_WD_STAT;
601  	state->online = stat3 & BQ25980_PRESENT_MASK;
602  	state->ce = chg_ctrl_2 & BQ25980_CHG_EN;
603  	state->hiz = chg_ctrl_2 & BQ25980_EN_HIZ;
604  	state->bypass = chg_ctrl_2 & BQ25980_EN_BYPASS;
605  
606  	return 0;
607  }
608  
bq25980_get_battery_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)609  static int bq25980_get_battery_property(struct power_supply *psy,
610  				enum power_supply_property psp,
611  				union power_supply_propval *val)
612  {
613  	struct bq25980_device *bq = power_supply_get_drvdata(psy);
614  	int ret = 0;
615  
616  	switch (psp) {
617  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
618  		val->intval = bq->init_data.ichg_max;
619  		break;
620  
621  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
622  		val->intval = bq->init_data.vreg_max;
623  		break;
624  
625  	case POWER_SUPPLY_PROP_CURRENT_NOW:
626  		ret = bq25980_get_ibat_adc(bq);
627  		val->intval = ret;
628  		break;
629  
630  	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
631  		ret = bq25980_get_adc_vbat(bq);
632  		if (ret < 0)
633  			return ret;
634  
635  		val->intval = ret;
636  		break;
637  
638  	default:
639  		return -EINVAL;
640  	}
641  
642  	return ret;
643  }
644  
bq25980_set_charger_property(struct power_supply * psy,enum power_supply_property prop,const union power_supply_propval * val)645  static int bq25980_set_charger_property(struct power_supply *psy,
646  		enum power_supply_property prop,
647  		const union power_supply_propval *val)
648  {
649  	struct bq25980_device *bq = power_supply_get_drvdata(psy);
650  	int ret = -EINVAL;
651  
652  	switch (prop) {
653  	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
654  		ret = bq25980_set_input_curr_lim(bq, val->intval);
655  		if (ret)
656  			return ret;
657  		break;
658  
659  	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
660  		ret = bq25980_set_input_volt_lim(bq, val->intval);
661  		if (ret)
662  			return ret;
663  		break;
664  
665  	case POWER_SUPPLY_PROP_CHARGE_TYPE:
666  		ret = bq25980_set_bypass(bq, val->intval);
667  		if (ret)
668  			return ret;
669  		break;
670  
671  	case POWER_SUPPLY_PROP_STATUS:
672  		ret = bq25980_set_chg_en(bq, val->intval);
673  		if (ret)
674  			return ret;
675  		break;
676  
677  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
678  		ret = bq25980_set_const_charge_curr(bq, val->intval);
679  		if (ret)
680  			return ret;
681  		break;
682  
683  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
684  		ret = bq25980_set_const_charge_volt(bq, val->intval);
685  		if (ret)
686  			return ret;
687  		break;
688  
689  	default:
690  		return -EINVAL;
691  	}
692  
693  	return ret;
694  }
695  
bq25980_get_charger_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)696  static int bq25980_get_charger_property(struct power_supply *psy,
697  				enum power_supply_property psp,
698  				union power_supply_propval *val)
699  {
700  	struct bq25980_device *bq = power_supply_get_drvdata(psy);
701  	struct bq25980_state state;
702  	int ret = 0;
703  
704  	mutex_lock(&bq->lock);
705  	ret = bq25980_get_state(bq, &state);
706  	mutex_unlock(&bq->lock);
707  	if (ret)
708  		return ret;
709  
710  	switch (psp) {
711  	case POWER_SUPPLY_PROP_MANUFACTURER:
712  		val->strval = BQ25980_MANUFACTURER;
713  		break;
714  	case POWER_SUPPLY_PROP_MODEL_NAME:
715  		val->strval = bq->model_name;
716  		break;
717  	case POWER_SUPPLY_PROP_ONLINE:
718  		val->intval = state.online;
719  		break;
720  
721  	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
722  		ret = bq25980_get_input_volt_lim(bq);
723  		if (ret < 0)
724  			return ret;
725  		val->intval = ret;
726  		break;
727  
728  	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
729  		ret = bq25980_get_input_curr_lim(bq);
730  		if (ret < 0)
731  			return ret;
732  
733  		val->intval = ret;
734  		break;
735  
736  	case POWER_SUPPLY_PROP_HEALTH:
737  		val->intval = POWER_SUPPLY_HEALTH_GOOD;
738  
739  		if (state.tflt)
740  			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
741  		else if (state.ovp)
742  			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
743  		else if (state.ocp)
744  			val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
745  		else if (state.wdt)
746  			val->intval =
747  				POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
748  		break;
749  
750  	case POWER_SUPPLY_PROP_STATUS:
751  		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
752  
753  		if ((state.ce) && (!state.hiz))
754  			val->intval = POWER_SUPPLY_STATUS_CHARGING;
755  		else if (state.dischg)
756  			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
757  		else if (!state.ce)
758  			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
759  		break;
760  
761  	case POWER_SUPPLY_PROP_CHARGE_TYPE:
762  		val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
763  
764  		if (!state.ce)
765  			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
766  		else if (state.bypass)
767  			val->intval = POWER_SUPPLY_CHARGE_TYPE_BYPASS;
768  		else if (!state.bypass)
769  			val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
770  		break;
771  
772  	case POWER_SUPPLY_PROP_CURRENT_NOW:
773  		ret = bq25980_get_adc_ibus(bq);
774  		if (ret < 0)
775  			return ret;
776  
777  		val->intval = ret;
778  		break;
779  
780  	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
781  		ret = bq25980_get_adc_vbus(bq);
782  		if (ret < 0)
783  			return ret;
784  
785  		val->intval = ret;
786  		break;
787  
788  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
789  		ret = bq25980_get_const_charge_curr(bq);
790  		if (ret < 0)
791  			return ret;
792  
793  		val->intval = ret;
794  		break;
795  
796  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
797  		ret = bq25980_get_const_charge_volt(bq);
798  		if (ret < 0)
799  			return ret;
800  
801  		val->intval = ret;
802  		break;
803  
804  	default:
805  		return -EINVAL;
806  	}
807  
808  	return ret;
809  }
810  
bq25980_state_changed(struct bq25980_device * bq,struct bq25980_state * new_state)811  static bool bq25980_state_changed(struct bq25980_device *bq,
812  				  struct bq25980_state *new_state)
813  {
814  	struct bq25980_state old_state;
815  
816  	mutex_lock(&bq->lock);
817  	old_state = bq->state;
818  	mutex_unlock(&bq->lock);
819  
820  	return (old_state.dischg != new_state->dischg ||
821  		old_state.ovp != new_state->ovp ||
822  		old_state.ocp != new_state->ocp ||
823  		old_state.online != new_state->online ||
824  		old_state.wdt != new_state->wdt ||
825  		old_state.tflt != new_state->tflt ||
826  		old_state.ce != new_state->ce ||
827  		old_state.hiz != new_state->hiz ||
828  		old_state.bypass != new_state->bypass);
829  }
830  
bq25980_irq_handler_thread(int irq,void * private)831  static irqreturn_t bq25980_irq_handler_thread(int irq, void *private)
832  {
833  	struct bq25980_device *bq = private;
834  	struct bq25980_state state;
835  	int ret;
836  
837  	ret = bq25980_get_state(bq, &state);
838  	if (ret < 0)
839  		goto irq_out;
840  
841  	if (!bq25980_state_changed(bq, &state))
842  		goto irq_out;
843  
844  	mutex_lock(&bq->lock);
845  	bq->state = state;
846  	mutex_unlock(&bq->lock);
847  
848  	power_supply_changed(bq->charger);
849  
850  irq_out:
851  	return IRQ_HANDLED;
852  }
853  
854  static enum power_supply_property bq25980_power_supply_props[] = {
855  	POWER_SUPPLY_PROP_MANUFACTURER,
856  	POWER_SUPPLY_PROP_MODEL_NAME,
857  	POWER_SUPPLY_PROP_STATUS,
858  	POWER_SUPPLY_PROP_ONLINE,
859  	POWER_SUPPLY_PROP_HEALTH,
860  	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
861  	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
862  	POWER_SUPPLY_PROP_CHARGE_TYPE,
863  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
864  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
865  	POWER_SUPPLY_PROP_CURRENT_NOW,
866  	POWER_SUPPLY_PROP_VOLTAGE_NOW,
867  };
868  
869  static enum power_supply_property bq25980_battery_props[] = {
870  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
871  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
872  	POWER_SUPPLY_PROP_CURRENT_NOW,
873  	POWER_SUPPLY_PROP_VOLTAGE_NOW,
874  };
875  
876  static char *bq25980_charger_supplied_to[] = {
877  	"main-battery",
878  };
879  
bq25980_property_is_writeable(struct power_supply * psy,enum power_supply_property prop)880  static int bq25980_property_is_writeable(struct power_supply *psy,
881  					 enum power_supply_property prop)
882  {
883  	switch (prop) {
884  	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
885  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
886  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
887  	case POWER_SUPPLY_PROP_CHARGE_TYPE:
888  	case POWER_SUPPLY_PROP_STATUS:
889  	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
890  		return true;
891  	default:
892  		return false;
893  	}
894  }
895  
896  static const struct power_supply_desc bq25980_power_supply_desc = {
897  	.name = "bq25980-charger",
898  	.type = POWER_SUPPLY_TYPE_MAINS,
899  	.properties = bq25980_power_supply_props,
900  	.num_properties = ARRAY_SIZE(bq25980_power_supply_props),
901  	.get_property = bq25980_get_charger_property,
902  	.set_property = bq25980_set_charger_property,
903  	.property_is_writeable = bq25980_property_is_writeable,
904  };
905  
906  static struct power_supply_desc bq25980_battery_desc = {
907  	.name			= "bq25980-battery",
908  	.type			= POWER_SUPPLY_TYPE_BATTERY,
909  	.get_property		= bq25980_get_battery_property,
910  	.properties		= bq25980_battery_props,
911  	.num_properties		= ARRAY_SIZE(bq25980_battery_props),
912  	.property_is_writeable	= bq25980_property_is_writeable,
913  };
914  
915  
bq25980_is_volatile_reg(struct device * dev,unsigned int reg)916  static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg)
917  {
918  	switch (reg) {
919  	case BQ25980_CHRGR_CTRL_2:
920  	case BQ25980_STAT1...BQ25980_FLAG5:
921  	case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB:
922  		return true;
923  	default:
924  		return false;
925  	}
926  }
927  
928  static const struct regmap_config bq25980_regmap_config = {
929  	.reg_bits = 8,
930  	.val_bits = 8,
931  
932  	.max_register = BQ25980_CHRGR_CTRL_6,
933  	.reg_defaults	= bq25980_reg_defs,
934  	.num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs),
935  	.cache_type = REGCACHE_RBTREE,
936  	.volatile_reg = bq25980_is_volatile_reg,
937  };
938  
939  static const struct regmap_config bq25975_regmap_config = {
940  	.reg_bits = 8,
941  	.val_bits = 8,
942  
943  	.max_register = BQ25980_CHRGR_CTRL_6,
944  	.reg_defaults	= bq25975_reg_defs,
945  	.num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs),
946  	.cache_type = REGCACHE_RBTREE,
947  	.volatile_reg = bq25980_is_volatile_reg,
948  };
949  
950  static const struct regmap_config bq25960_regmap_config = {
951  	.reg_bits = 8,
952  	.val_bits = 8,
953  
954  	.max_register = BQ25980_CHRGR_CTRL_6,
955  	.reg_defaults	= bq25960_reg_defs,
956  	.num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs),
957  	.cache_type = REGCACHE_RBTREE,
958  	.volatile_reg = bq25980_is_volatile_reg,
959  };
960  
961  static const struct bq25980_chip_info bq25980_chip_info_tbl[] = {
962  	[BQ25980] = {
963  		.model_id = BQ25980,
964  		.regmap_config = &bq25980_regmap_config,
965  
966  		.busocp_def = BQ25980_BUSOCP_DFLT_uA,
967  		.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
968  		.busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA,
969  		.busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA,
970  		.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
971  
972  		.busovp_sc_def = BQ25980_BUSOVP_DFLT_uV,
973  		.busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV,
974  		.busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV,
975  		.busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV,
976  		.busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV,
977  		.busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV,
978  		.busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV,
979  		.busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV,
980  		.busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV,
981  		.busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV,
982  
983  		.batovp_def = BQ25980_BATOVP_DFLT_uV,
984  		.batovp_max = BQ25980_BATOVP_MAX_uV,
985  		.batovp_min = BQ25980_BATOVP_MIN_uV,
986  		.batovp_step = BQ25980_BATOVP_STEP_uV,
987  		.batovp_offset = BQ25980_BATOVP_OFFSET_uV,
988  
989  		.batocp_def = BQ25980_BATOCP_DFLT_uA,
990  		.batocp_max = BQ25980_BATOCP_MAX_uA,
991  	},
992  
993  	[BQ25975] = {
994  		.model_id = BQ25975,
995  		.regmap_config = &bq25975_regmap_config,
996  
997  		.busocp_def = BQ25975_BUSOCP_DFLT_uA,
998  		.busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA,
999  		.busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA,
1000  		.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
1001  		.busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA,
1002  
1003  		.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1004  		.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1005  		.busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV,
1006  		.busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV,
1007  		.busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV,
1008  		.busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV,
1009  		.busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV,
1010  		.busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV,
1011  		.busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV,
1012  		.busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV,
1013  
1014  		.batovp_def = BQ25975_BATOVP_DFLT_uV,
1015  		.batovp_max = BQ25975_BATOVP_MAX_uV,
1016  		.batovp_min = BQ25975_BATOVP_MIN_uV,
1017  		.batovp_step = BQ25975_BATOVP_STEP_uV,
1018  		.batovp_offset = BQ25975_BATOVP_OFFSET_uV,
1019  
1020  		.batocp_def = BQ25980_BATOCP_DFLT_uA,
1021  		.batocp_max = BQ25980_BATOCP_MAX_uA,
1022  	},
1023  
1024  	[BQ25960] = {
1025  		.model_id = BQ25960,
1026  		.regmap_config = &bq25960_regmap_config,
1027  
1028  		.busocp_def = BQ25960_BUSOCP_DFLT_uA,
1029  		.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
1030  		.busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA,
1031  		.busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA,
1032  		.busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA,
1033  
1034  		.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1035  		.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1036  		.busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV,
1037  		.busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV,
1038  		.busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV,
1039  		.busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV,
1040  		.busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV,
1041  		.busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV,
1042  		.busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV,
1043  		.busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV,
1044  
1045  		.batovp_def = BQ25960_BATOVP_DFLT_uV,
1046  		.batovp_max = BQ25960_BATOVP_MAX_uV,
1047  		.batovp_min = BQ25960_BATOVP_MIN_uV,
1048  		.batovp_step = BQ25960_BATOVP_STEP_uV,
1049  		.batovp_offset = BQ25960_BATOVP_OFFSET_uV,
1050  
1051  		.batocp_def = BQ25960_BATOCP_DFLT_uA,
1052  		.batocp_max = BQ25960_BATOCP_MAX_uA,
1053  	},
1054  };
1055  
bq25980_power_supply_init(struct bq25980_device * bq,struct device * dev)1056  static int bq25980_power_supply_init(struct bq25980_device *bq,
1057  							struct device *dev)
1058  {
1059  	struct power_supply_config psy_cfg = { .drv_data = bq,
1060  						.of_node = dev->of_node, };
1061  
1062  	psy_cfg.supplied_to = bq25980_charger_supplied_to;
1063  	psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to);
1064  
1065  	bq->charger = devm_power_supply_register(bq->dev,
1066  						 &bq25980_power_supply_desc,
1067  						 &psy_cfg);
1068  	if (IS_ERR(bq->charger))
1069  		return -EINVAL;
1070  
1071  	bq->battery = devm_power_supply_register(bq->dev,
1072  						      &bq25980_battery_desc,
1073  						      &psy_cfg);
1074  	if (IS_ERR(bq->battery))
1075  		return -EINVAL;
1076  
1077  	return 0;
1078  }
1079  
bq25980_hw_init(struct bq25980_device * bq)1080  static int bq25980_hw_init(struct bq25980_device *bq)
1081  {
1082  	struct power_supply_battery_info *bat_info;
1083  	int wd_reg_val = BQ25980_WATCHDOG_DIS;
1084  	int wd_max_val = BQ25980_NUM_WD_VAL - 1;
1085  	int ret = 0;
1086  	int curr_val;
1087  	int volt_val;
1088  	int i;
1089  
1090  	if (bq->watchdog_timer) {
1091  		if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val])
1092  			wd_reg_val = wd_max_val;
1093  		else {
1094  			for (i = 0; i < wd_max_val; i++) {
1095  				if (bq->watchdog_timer > bq25980_watchdog_time[i] &&
1096  				    bq->watchdog_timer < bq25980_watchdog_time[i + 1]) {
1097  					wd_reg_val = i;
1098  					break;
1099  				}
1100  			}
1101  		}
1102  	}
1103  
1104  	ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3,
1105  				 BQ25980_WATCHDOG_MASK, wd_reg_val);
1106  	if (ret)
1107  		return ret;
1108  
1109  	ret = power_supply_get_battery_info(bq->charger, &bat_info);
1110  	if (ret) {
1111  		dev_warn(bq->dev, "battery info missing\n");
1112  		return -EINVAL;
1113  	}
1114  
1115  	bq->init_data.ichg_max = bat_info->constant_charge_current_max_ua;
1116  	bq->init_data.vreg_max = bat_info->constant_charge_voltage_max_uv;
1117  
1118  	if (bq->state.bypass) {
1119  		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
1120  					BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
1121  		if (ret)
1122  			return ret;
1123  
1124  		curr_val = bq->init_data.bypass_ilim;
1125  		volt_val = bq->init_data.bypass_vlim;
1126  	} else {
1127  		curr_val = bq->init_data.sc_ilim;
1128  		volt_val = bq->init_data.sc_vlim;
1129  	}
1130  
1131  	ret = bq25980_set_input_curr_lim(bq, curr_val);
1132  	if (ret)
1133  		return ret;
1134  
1135  	ret = bq25980_set_input_volt_lim(bq, volt_val);
1136  	if (ret)
1137  		return ret;
1138  
1139  	return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1,
1140  				 BQ25980_ADC_EN, BQ25980_ADC_EN);
1141  }
1142  
bq25980_parse_dt(struct bq25980_device * bq)1143  static int bq25980_parse_dt(struct bq25980_device *bq)
1144  {
1145  	int ret;
1146  
1147  	ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
1148  				       &bq->watchdog_timer);
1149  	if (ret)
1150  		bq->watchdog_timer = BQ25980_WATCHDOG_MIN;
1151  
1152  	if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX ||
1153  	    bq->watchdog_timer < BQ25980_WATCHDOG_MIN)
1154  		return -EINVAL;
1155  
1156  	ret = device_property_read_u32(bq->dev,
1157  				       "ti,sc-ovp-limit-microvolt",
1158  				       &bq->init_data.sc_vlim);
1159  	if (ret)
1160  		bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def;
1161  
1162  	if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max ||
1163  	    bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) {
1164  		dev_err(bq->dev, "SC ovp limit is out of range\n");
1165  		return -EINVAL;
1166  	}
1167  
1168  	ret = device_property_read_u32(bq->dev,
1169  				       "ti,sc-ocp-limit-microamp",
1170  				       &bq->init_data.sc_ilim);
1171  	if (ret)
1172  		bq->init_data.sc_ilim = bq->chip_info->busocp_def;
1173  
1174  	if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max ||
1175  	    bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) {
1176  		dev_err(bq->dev, "SC ocp limit is out of range\n");
1177  		return -EINVAL;
1178  	}
1179  
1180  	ret = device_property_read_u32(bq->dev,
1181  				       "ti,bypass-ovp-limit-microvolt",
1182  				       &bq->init_data.bypass_vlim);
1183  	if (ret)
1184  		bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def;
1185  
1186  	if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max ||
1187  	    bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) {
1188  		dev_err(bq->dev, "Bypass ovp limit is out of range\n");
1189  		return -EINVAL;
1190  	}
1191  
1192  	ret = device_property_read_u32(bq->dev,
1193  				       "ti,bypass-ocp-limit-microamp",
1194  				       &bq->init_data.bypass_ilim);
1195  	if (ret)
1196  		bq->init_data.bypass_ilim = bq->chip_info->busocp_def;
1197  
1198  	if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max ||
1199  	    bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) {
1200  		dev_err(bq->dev, "Bypass ocp limit is out of range\n");
1201  		return -EINVAL;
1202  	}
1203  
1204  
1205  	bq->state.bypass = device_property_read_bool(bq->dev,
1206  						      "ti,bypass-enable");
1207  	return 0;
1208  }
1209  
bq25980_probe(struct i2c_client * client)1210  static int bq25980_probe(struct i2c_client *client)
1211  {
1212  	const struct i2c_device_id *id = i2c_client_get_device_id(client);
1213  	struct device *dev = &client->dev;
1214  	struct bq25980_device *bq;
1215  	int ret;
1216  
1217  	bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
1218  	if (!bq)
1219  		return -ENOMEM;
1220  
1221  	bq->client = client;
1222  	bq->dev = dev;
1223  
1224  	mutex_init(&bq->lock);
1225  
1226  	strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
1227  	bq->chip_info = &bq25980_chip_info_tbl[id->driver_data];
1228  
1229  	bq->regmap = devm_regmap_init_i2c(client,
1230  					  bq->chip_info->regmap_config);
1231  	if (IS_ERR(bq->regmap)) {
1232  		dev_err(dev, "Failed to allocate register map\n");
1233  		return PTR_ERR(bq->regmap);
1234  	}
1235  
1236  	i2c_set_clientdata(client, bq);
1237  
1238  	ret = bq25980_parse_dt(bq);
1239  	if (ret) {
1240  		dev_err(dev, "Failed to read device tree properties%d\n", ret);
1241  		return ret;
1242  	}
1243  
1244  	if (client->irq) {
1245  		ret = devm_request_threaded_irq(dev, client->irq, NULL,
1246  						bq25980_irq_handler_thread,
1247  						IRQF_TRIGGER_FALLING |
1248  						IRQF_ONESHOT,
1249  						dev_name(&client->dev), bq);
1250  		if (ret)
1251  			return ret;
1252  	}
1253  
1254  	ret = bq25980_power_supply_init(bq, dev);
1255  	if (ret) {
1256  		dev_err(dev, "Failed to register power supply\n");
1257  		return ret;
1258  	}
1259  
1260  	ret = bq25980_hw_init(bq);
1261  	if (ret) {
1262  		dev_err(dev, "Cannot initialize the chip.\n");
1263  		return ret;
1264  	}
1265  
1266  	return 0;
1267  }
1268  
1269  static const struct i2c_device_id bq25980_i2c_ids[] = {
1270  	{ "bq25980", BQ25980 },
1271  	{ "bq25975", BQ25975 },
1272  	{ "bq25960", BQ25960 },
1273  	{},
1274  };
1275  MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids);
1276  
1277  static const struct of_device_id bq25980_of_match[] = {
1278  	{ .compatible = "ti,bq25980", .data = (void *)BQ25980 },
1279  	{ .compatible = "ti,bq25975", .data = (void *)BQ25975 },
1280  	{ .compatible = "ti,bq25960", .data = (void *)BQ25960 },
1281  	{ },
1282  };
1283  MODULE_DEVICE_TABLE(of, bq25980_of_match);
1284  
1285  static struct i2c_driver bq25980_driver = {
1286  	.driver = {
1287  		.name = "bq25980-charger",
1288  		.of_match_table = bq25980_of_match,
1289  	},
1290  	.probe = bq25980_probe,
1291  	.id_table = bq25980_i2c_ids,
1292  };
1293  module_i2c_driver(bq25980_driver);
1294  
1295  MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
1296  MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1297  MODULE_DESCRIPTION("bq25980 charger driver");
1298  MODULE_LICENSE("GPL v2");
1299