1 /*
2 * Driver for the TI bq24190 battery charger.
3 *
4 * Author: Mark A. Greer <mgreer@animalcreek.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/module.h>
12 #include <linux/interrupt.h>
13 #include <linux/delay.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/power_supply.h>
18 #include <linux/gpio.h>
19 #include <linux/i2c.h>
20
21 #include <linux/power/bq24190_charger.h>
22
23
24 #define BQ24190_MANUFACTURER "Texas Instruments"
25
26 #define BQ24190_REG_ISC 0x00 /* Input Source Control */
27 #define BQ24190_REG_ISC_EN_HIZ_MASK BIT(7)
28 #define BQ24190_REG_ISC_EN_HIZ_SHIFT 7
29 #define BQ24190_REG_ISC_VINDPM_MASK (BIT(6) | BIT(5) | BIT(4) | \
30 BIT(3))
31 #define BQ24190_REG_ISC_VINDPM_SHIFT 3
32 #define BQ24190_REG_ISC_IINLIM_MASK (BIT(2) | BIT(1) | BIT(0))
33 #define BQ24190_REG_ISC_IINLIM_SHIFT 0
34
35 #define BQ24190_REG_POC 0x01 /* Power-On Configuration */
36 #define BQ24190_REG_POC_RESET_MASK BIT(7)
37 #define BQ24190_REG_POC_RESET_SHIFT 7
38 #define BQ24190_REG_POC_WDT_RESET_MASK BIT(6)
39 #define BQ24190_REG_POC_WDT_RESET_SHIFT 6
40 #define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4))
41 #define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4
42 #define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1))
43 #define BQ24190_REG_POC_SYS_MIN_SHIFT 1
44 #define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0)
45 #define BQ24190_REG_POC_BOOST_LIM_SHIFT 0
46
47 #define BQ24190_REG_CCC 0x02 /* Charge Current Control */
48 #define BQ24190_REG_CCC_ICHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
49 BIT(4) | BIT(3) | BIT(2))
50 #define BQ24190_REG_CCC_ICHG_SHIFT 2
51 #define BQ24190_REG_CCC_FORCE_20PCT_MASK BIT(0)
52 #define BQ24190_REG_CCC_FORCE_20PCT_SHIFT 0
53
54 #define BQ24190_REG_PCTCC 0x03 /* Pre-charge/Termination Current Cntl */
55 #define BQ24190_REG_PCTCC_IPRECHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
56 BIT(4))
57 #define BQ24190_REG_PCTCC_IPRECHG_SHIFT 4
58 #define BQ24190_REG_PCTCC_ITERM_MASK (BIT(3) | BIT(2) | BIT(1) | \
59 BIT(0))
60 #define BQ24190_REG_PCTCC_ITERM_SHIFT 0
61
62 #define BQ24190_REG_CVC 0x04 /* Charge Voltage Control */
63 #define BQ24190_REG_CVC_VREG_MASK (BIT(7) | BIT(6) | BIT(5) | \
64 BIT(4) | BIT(3) | BIT(2))
65 #define BQ24190_REG_CVC_VREG_SHIFT 2
66 #define BQ24190_REG_CVC_BATLOWV_MASK BIT(1)
67 #define BQ24190_REG_CVC_BATLOWV_SHIFT 1
68 #define BQ24190_REG_CVC_VRECHG_MASK BIT(0)
69 #define BQ24190_REG_CVC_VRECHG_SHIFT 0
70
71 #define BQ24190_REG_CTTC 0x05 /* Charge Term/Timer Control */
72 #define BQ24190_REG_CTTC_EN_TERM_MASK BIT(7)
73 #define BQ24190_REG_CTTC_EN_TERM_SHIFT 7
74 #define BQ24190_REG_CTTC_TERM_STAT_MASK BIT(6)
75 #define BQ24190_REG_CTTC_TERM_STAT_SHIFT 6
76 #define BQ24190_REG_CTTC_WATCHDOG_MASK (BIT(5) | BIT(4))
77 #define BQ24190_REG_CTTC_WATCHDOG_SHIFT 4
78 #define BQ24190_REG_CTTC_EN_TIMER_MASK BIT(3)
79 #define BQ24190_REG_CTTC_EN_TIMER_SHIFT 3
80 #define BQ24190_REG_CTTC_CHG_TIMER_MASK (BIT(2) | BIT(1))
81 #define BQ24190_REG_CTTC_CHG_TIMER_SHIFT 1
82 #define BQ24190_REG_CTTC_JEITA_ISET_MASK BIT(0)
83 #define BQ24190_REG_CTTC_JEITA_ISET_SHIFT 0
84
85 #define BQ24190_REG_ICTRC 0x06 /* IR Comp/Thermal Regulation Control */
86 #define BQ24190_REG_ICTRC_BAT_COMP_MASK (BIT(7) | BIT(6) | BIT(5))
87 #define BQ24190_REG_ICTRC_BAT_COMP_SHIFT 5
88 #define BQ24190_REG_ICTRC_VCLAMP_MASK (BIT(4) | BIT(3) | BIT(2))
89 #define BQ24190_REG_ICTRC_VCLAMP_SHIFT 2
90 #define BQ24190_REG_ICTRC_TREG_MASK (BIT(1) | BIT(0))
91 #define BQ24190_REG_ICTRC_TREG_SHIFT 0
92
93 #define BQ24190_REG_MOC 0x07 /* Misc. Operation Control */
94 #define BQ24190_REG_MOC_DPDM_EN_MASK BIT(7)
95 #define BQ24190_REG_MOC_DPDM_EN_SHIFT 7
96 #define BQ24190_REG_MOC_TMR2X_EN_MASK BIT(6)
97 #define BQ24190_REG_MOC_TMR2X_EN_SHIFT 6
98 #define BQ24190_REG_MOC_BATFET_DISABLE_MASK BIT(5)
99 #define BQ24190_REG_MOC_BATFET_DISABLE_SHIFT 5
100 #define BQ24190_REG_MOC_JEITA_VSET_MASK BIT(4)
101 #define BQ24190_REG_MOC_JEITA_VSET_SHIFT 4
102 #define BQ24190_REG_MOC_INT_MASK_MASK (BIT(1) | BIT(0))
103 #define BQ24190_REG_MOC_INT_MASK_SHIFT 0
104
105 #define BQ24190_REG_SS 0x08 /* System Status */
106 #define BQ24190_REG_SS_VBUS_STAT_MASK (BIT(7) | BIT(6))
107 #define BQ24190_REG_SS_VBUS_STAT_SHIFT 6
108 #define BQ24190_REG_SS_CHRG_STAT_MASK (BIT(5) | BIT(4))
109 #define BQ24190_REG_SS_CHRG_STAT_SHIFT 4
110 #define BQ24190_REG_SS_DPM_STAT_MASK BIT(3)
111 #define BQ24190_REG_SS_DPM_STAT_SHIFT 3
112 #define BQ24190_REG_SS_PG_STAT_MASK BIT(2)
113 #define BQ24190_REG_SS_PG_STAT_SHIFT 2
114 #define BQ24190_REG_SS_THERM_STAT_MASK BIT(1)
115 #define BQ24190_REG_SS_THERM_STAT_SHIFT 1
116 #define BQ24190_REG_SS_VSYS_STAT_MASK BIT(0)
117 #define BQ24190_REG_SS_VSYS_STAT_SHIFT 0
118
119 #define BQ24190_REG_F 0x09 /* Fault */
120 #define BQ24190_REG_F_WATCHDOG_FAULT_MASK BIT(7)
121 #define BQ24190_REG_F_WATCHDOG_FAULT_SHIFT 7
122 #define BQ24190_REG_F_BOOST_FAULT_MASK BIT(6)
123 #define BQ24190_REG_F_BOOST_FAULT_SHIFT 6
124 #define BQ24190_REG_F_CHRG_FAULT_MASK (BIT(5) | BIT(4))
125 #define BQ24190_REG_F_CHRG_FAULT_SHIFT 4
126 #define BQ24190_REG_F_BAT_FAULT_MASK BIT(3)
127 #define BQ24190_REG_F_BAT_FAULT_SHIFT 3
128 #define BQ24190_REG_F_NTC_FAULT_MASK (BIT(2) | BIT(1) | BIT(0))
129 #define BQ24190_REG_F_NTC_FAULT_SHIFT 0
130
131 #define BQ24190_REG_VPRS 0x0A /* Vendor/Part/Revision Status */
132 #define BQ24190_REG_VPRS_PN_MASK (BIT(5) | BIT(4) | BIT(3))
133 #define BQ24190_REG_VPRS_PN_SHIFT 3
134 #define BQ24190_REG_VPRS_PN_24190 0x4
135 #define BQ24190_REG_VPRS_PN_24192 0x5 /* Also 24193 */
136 #define BQ24190_REG_VPRS_PN_24192I 0x3
137 #define BQ24190_REG_VPRS_TS_PROFILE_MASK BIT(2)
138 #define BQ24190_REG_VPRS_TS_PROFILE_SHIFT 2
139 #define BQ24190_REG_VPRS_DEV_REG_MASK (BIT(1) | BIT(0))
140 #define BQ24190_REG_VPRS_DEV_REG_SHIFT 0
141
142 /*
143 * The FAULT register is latched by the bq24190 (except for NTC_FAULT)
144 * so the first read after a fault returns the latched value and subsequent
145 * reads return the current value. In order to return the fault status
146 * to the user, have the interrupt handler save the reg's value and retrieve
147 * it in the appropriate health/status routine. Each routine has its own
148 * flag indicating whether it should use the value stored by the last run
149 * of the interrupt handler or do an actual reg read. That way each routine
150 * can report back whatever fault may have occured.
151 */
152 struct bq24190_dev_info {
153 struct i2c_client *client;
154 struct device *dev;
155 struct power_supply charger;
156 struct power_supply battery;
157 char model_name[I2C_NAME_SIZE];
158 kernel_ulong_t model;
159 unsigned int gpio_int;
160 unsigned int irq;
161 struct mutex f_reg_lock;
162 bool first_time;
163 bool charger_health_valid;
164 bool battery_health_valid;
165 bool battery_status_valid;
166 u8 f_reg;
167 u8 ss_reg;
168 u8 watchdog;
169 };
170
171 /*
172 * The tables below provide a 2-way mapping for the value that goes in
173 * the register field and the real-world value that it represents.
174 * The index of the array is the value that goes in the register; the
175 * number at that index in the array is the real-world value that it
176 * represents.
177 */
178 /* REG02[7:2] (ICHG) in uAh */
179 static const int bq24190_ccc_ichg_values[] = {
180 512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000,
181 1024000, 1088000, 1152000, 1216000, 1280000, 1344000, 1408000, 1472000,
182 1536000, 1600000, 1664000, 1728000, 1792000, 1856000, 1920000, 1984000,
183 2048000, 2112000, 2176000, 2240000, 2304000, 2368000, 2432000, 2496000,
184 2560000, 2624000, 2688000, 2752000, 2816000, 2880000, 2944000, 3008000,
185 3072000, 3136000, 3200000, 3264000, 3328000, 3392000, 3456000, 3520000,
186 3584000, 3648000, 3712000, 3776000, 3840000, 3904000, 3968000, 4032000,
187 4096000, 4160000, 4224000, 4288000, 4352000, 4416000, 4480000, 4544000
188 };
189
190 /* REG04[7:2] (VREG) in uV */
191 static const int bq24190_cvc_vreg_values[] = {
192 3504000, 3520000, 3536000, 3552000, 3568000, 3584000, 3600000, 3616000,
193 3632000, 3648000, 3664000, 3680000, 3696000, 3712000, 3728000, 3744000,
194 3760000, 3776000, 3792000, 3808000, 3824000, 3840000, 3856000, 3872000,
195 3888000, 3904000, 3920000, 3936000, 3952000, 3968000, 3984000, 4000000,
196 4016000, 4032000, 4048000, 4064000, 4080000, 4096000, 4112000, 4128000,
197 4144000, 4160000, 4176000, 4192000, 4208000, 4224000, 4240000, 4256000,
198 4272000, 4288000, 4304000, 4320000, 4336000, 4352000, 4368000, 4384000,
199 4400000
200 };
201
202 /* REG06[1:0] (TREG) in tenths of degrees Celcius */
203 static const int bq24190_ictrc_treg_values[] = {
204 600, 800, 1000, 1200
205 };
206
207 /*
208 * Return the index in 'tbl' of greatest value that is less than or equal to
209 * 'val'. The index range returned is 0 to 'tbl_size' - 1. Assumes that
210 * the values in 'tbl' are sorted from smallest to largest and 'tbl_size'
211 * is less than 2^8.
212 */
bq24190_find_idx(const int tbl[],int tbl_size,int v)213 static u8 bq24190_find_idx(const int tbl[], int tbl_size, int v)
214 {
215 int i;
216
217 for (i = 1; i < tbl_size; i++)
218 if (v < tbl[i])
219 break;
220
221 return i - 1;
222 }
223
224 /* Basic driver I/O routines */
225
bq24190_read(struct bq24190_dev_info * bdi,u8 reg,u8 * data)226 static int bq24190_read(struct bq24190_dev_info *bdi, u8 reg, u8 *data)
227 {
228 int ret;
229
230 ret = i2c_smbus_read_byte_data(bdi->client, reg);
231 if (ret < 0)
232 return ret;
233
234 *data = ret;
235 return 0;
236 }
237
bq24190_write(struct bq24190_dev_info * bdi,u8 reg,u8 data)238 static int bq24190_write(struct bq24190_dev_info *bdi, u8 reg, u8 data)
239 {
240 return i2c_smbus_write_byte_data(bdi->client, reg, data);
241 }
242
bq24190_read_mask(struct bq24190_dev_info * bdi,u8 reg,u8 mask,u8 shift,u8 * data)243 static int bq24190_read_mask(struct bq24190_dev_info *bdi, u8 reg,
244 u8 mask, u8 shift, u8 *data)
245 {
246 u8 v;
247 int ret;
248
249 ret = bq24190_read(bdi, reg, &v);
250 if (ret < 0)
251 return ret;
252
253 v &= mask;
254 v >>= shift;
255 *data = v;
256
257 return 0;
258 }
259
bq24190_write_mask(struct bq24190_dev_info * bdi,u8 reg,u8 mask,u8 shift,u8 data)260 static int bq24190_write_mask(struct bq24190_dev_info *bdi, u8 reg,
261 u8 mask, u8 shift, u8 data)
262 {
263 u8 v;
264 int ret;
265
266 ret = bq24190_read(bdi, reg, &v);
267 if (ret < 0)
268 return ret;
269
270 v &= ~mask;
271 v |= ((data << shift) & mask);
272
273 return bq24190_write(bdi, reg, v);
274 }
275
bq24190_get_field_val(struct bq24190_dev_info * bdi,u8 reg,u8 mask,u8 shift,const int tbl[],int tbl_size,int * val)276 static int bq24190_get_field_val(struct bq24190_dev_info *bdi,
277 u8 reg, u8 mask, u8 shift,
278 const int tbl[], int tbl_size,
279 int *val)
280 {
281 u8 v;
282 int ret;
283
284 ret = bq24190_read_mask(bdi, reg, mask, shift, &v);
285 if (ret < 0)
286 return ret;
287
288 v = (v >= tbl_size) ? (tbl_size - 1) : v;
289 *val = tbl[v];
290
291 return 0;
292 }
293
bq24190_set_field_val(struct bq24190_dev_info * bdi,u8 reg,u8 mask,u8 shift,const int tbl[],int tbl_size,int val)294 static int bq24190_set_field_val(struct bq24190_dev_info *bdi,
295 u8 reg, u8 mask, u8 shift,
296 const int tbl[], int tbl_size,
297 int val)
298 {
299 u8 idx;
300
301 idx = bq24190_find_idx(tbl, tbl_size, val);
302
303 return bq24190_write_mask(bdi, reg, mask, shift, idx);
304 }
305
306 #ifdef CONFIG_SYSFS
307 /*
308 * There are a numerous options that are configurable on the bq24190
309 * that go well beyond what the power_supply properties provide access to.
310 * Provide sysfs access to them so they can be examined and possibly modified
311 * on the fly. They will be provided for the charger power_supply object only
312 * and will be prefixed by 'f_' to make them easier to recognize.
313 */
314
315 #define BQ24190_SYSFS_FIELD(_name, r, f, m, store) \
316 { \
317 .attr = __ATTR(f_##_name, m, bq24190_sysfs_show, store), \
318 .reg = BQ24190_REG_##r, \
319 .mask = BQ24190_REG_##r##_##f##_MASK, \
320 .shift = BQ24190_REG_##r##_##f##_SHIFT, \
321 }
322
323 #define BQ24190_SYSFS_FIELD_RW(_name, r, f) \
324 BQ24190_SYSFS_FIELD(_name, r, f, S_IWUSR | S_IRUGO, \
325 bq24190_sysfs_store)
326
327 #define BQ24190_SYSFS_FIELD_RO(_name, r, f) \
328 BQ24190_SYSFS_FIELD(_name, r, f, S_IRUGO, NULL)
329
330 static ssize_t bq24190_sysfs_show(struct device *dev,
331 struct device_attribute *attr, char *buf);
332 static ssize_t bq24190_sysfs_store(struct device *dev,
333 struct device_attribute *attr, const char *buf, size_t count);
334
335 struct bq24190_sysfs_field_info {
336 struct device_attribute attr;
337 u8 reg;
338 u8 mask;
339 u8 shift;
340 };
341
342 /* On i386 ptrace-abi.h defines SS that breaks the macro calls below. */
343 #undef SS
344
345 static struct bq24190_sysfs_field_info bq24190_sysfs_field_tbl[] = {
346 /* sysfs name reg field in reg */
347 BQ24190_SYSFS_FIELD_RW(en_hiz, ISC, EN_HIZ),
348 BQ24190_SYSFS_FIELD_RW(vindpm, ISC, VINDPM),
349 BQ24190_SYSFS_FIELD_RW(iinlim, ISC, IINLIM),
350 BQ24190_SYSFS_FIELD_RW(chg_config, POC, CHG_CONFIG),
351 BQ24190_SYSFS_FIELD_RW(sys_min, POC, SYS_MIN),
352 BQ24190_SYSFS_FIELD_RW(boost_lim, POC, BOOST_LIM),
353 BQ24190_SYSFS_FIELD_RW(ichg, CCC, ICHG),
354 BQ24190_SYSFS_FIELD_RW(force_20_pct, CCC, FORCE_20PCT),
355 BQ24190_SYSFS_FIELD_RW(iprechg, PCTCC, IPRECHG),
356 BQ24190_SYSFS_FIELD_RW(iterm, PCTCC, ITERM),
357 BQ24190_SYSFS_FIELD_RW(vreg, CVC, VREG),
358 BQ24190_SYSFS_FIELD_RW(batlowv, CVC, BATLOWV),
359 BQ24190_SYSFS_FIELD_RW(vrechg, CVC, VRECHG),
360 BQ24190_SYSFS_FIELD_RW(en_term, CTTC, EN_TERM),
361 BQ24190_SYSFS_FIELD_RW(term_stat, CTTC, TERM_STAT),
362 BQ24190_SYSFS_FIELD_RO(watchdog, CTTC, WATCHDOG),
363 BQ24190_SYSFS_FIELD_RW(en_timer, CTTC, EN_TIMER),
364 BQ24190_SYSFS_FIELD_RW(chg_timer, CTTC, CHG_TIMER),
365 BQ24190_SYSFS_FIELD_RW(jeta_iset, CTTC, JEITA_ISET),
366 BQ24190_SYSFS_FIELD_RW(bat_comp, ICTRC, BAT_COMP),
367 BQ24190_SYSFS_FIELD_RW(vclamp, ICTRC, VCLAMP),
368 BQ24190_SYSFS_FIELD_RW(treg, ICTRC, TREG),
369 BQ24190_SYSFS_FIELD_RW(dpdm_en, MOC, DPDM_EN),
370 BQ24190_SYSFS_FIELD_RW(tmr2x_en, MOC, TMR2X_EN),
371 BQ24190_SYSFS_FIELD_RW(batfet_disable, MOC, BATFET_DISABLE),
372 BQ24190_SYSFS_FIELD_RW(jeita_vset, MOC, JEITA_VSET),
373 BQ24190_SYSFS_FIELD_RO(int_mask, MOC, INT_MASK),
374 BQ24190_SYSFS_FIELD_RO(vbus_stat, SS, VBUS_STAT),
375 BQ24190_SYSFS_FIELD_RO(chrg_stat, SS, CHRG_STAT),
376 BQ24190_SYSFS_FIELD_RO(dpm_stat, SS, DPM_STAT),
377 BQ24190_SYSFS_FIELD_RO(pg_stat, SS, PG_STAT),
378 BQ24190_SYSFS_FIELD_RO(therm_stat, SS, THERM_STAT),
379 BQ24190_SYSFS_FIELD_RO(vsys_stat, SS, VSYS_STAT),
380 BQ24190_SYSFS_FIELD_RO(watchdog_fault, F, WATCHDOG_FAULT),
381 BQ24190_SYSFS_FIELD_RO(boost_fault, F, BOOST_FAULT),
382 BQ24190_SYSFS_FIELD_RO(chrg_fault, F, CHRG_FAULT),
383 BQ24190_SYSFS_FIELD_RO(bat_fault, F, BAT_FAULT),
384 BQ24190_SYSFS_FIELD_RO(ntc_fault, F, NTC_FAULT),
385 BQ24190_SYSFS_FIELD_RO(pn, VPRS, PN),
386 BQ24190_SYSFS_FIELD_RO(ts_profile, VPRS, TS_PROFILE),
387 BQ24190_SYSFS_FIELD_RO(dev_reg, VPRS, DEV_REG),
388 };
389
390 static struct attribute *
391 bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1];
392
393 static const struct attribute_group bq24190_sysfs_attr_group = {
394 .attrs = bq24190_sysfs_attrs,
395 };
396
bq24190_sysfs_init_attrs(void)397 static void bq24190_sysfs_init_attrs(void)
398 {
399 int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
400
401 for (i = 0; i < limit; i++)
402 bq24190_sysfs_attrs[i] = &bq24190_sysfs_field_tbl[i].attr.attr;
403
404 bq24190_sysfs_attrs[limit] = NULL; /* Has additional entry for this */
405 }
406
bq24190_sysfs_field_lookup(const char * name)407 static struct bq24190_sysfs_field_info *bq24190_sysfs_field_lookup(
408 const char *name)
409 {
410 int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
411
412 for (i = 0; i < limit; i++)
413 if (!strcmp(name, bq24190_sysfs_field_tbl[i].attr.attr.name))
414 break;
415
416 if (i >= limit)
417 return NULL;
418
419 return &bq24190_sysfs_field_tbl[i];
420 }
421
bq24190_sysfs_show(struct device * dev,struct device_attribute * attr,char * buf)422 static ssize_t bq24190_sysfs_show(struct device *dev,
423 struct device_attribute *attr, char *buf)
424 {
425 struct power_supply *psy = dev_get_drvdata(dev);
426 struct bq24190_dev_info *bdi =
427 container_of(psy, struct bq24190_dev_info, charger);
428 struct bq24190_sysfs_field_info *info;
429 int ret;
430 u8 v;
431
432 info = bq24190_sysfs_field_lookup(attr->attr.name);
433 if (!info)
434 return -EINVAL;
435
436 ret = bq24190_read_mask(bdi, info->reg, info->mask, info->shift, &v);
437 if (ret)
438 return ret;
439
440 return scnprintf(buf, PAGE_SIZE, "%hhx\n", v);
441 }
442
bq24190_sysfs_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)443 static ssize_t bq24190_sysfs_store(struct device *dev,
444 struct device_attribute *attr, const char *buf, size_t count)
445 {
446 struct power_supply *psy = dev_get_drvdata(dev);
447 struct bq24190_dev_info *bdi =
448 container_of(psy, struct bq24190_dev_info, charger);
449 struct bq24190_sysfs_field_info *info;
450 int ret;
451 u8 v;
452
453 info = bq24190_sysfs_field_lookup(attr->attr.name);
454 if (!info)
455 return -EINVAL;
456
457 ret = kstrtou8(buf, 0, &v);
458 if (ret < 0)
459 return ret;
460
461 ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
462 if (ret)
463 return ret;
464
465 return count;
466 }
467
bq24190_sysfs_create_group(struct bq24190_dev_info * bdi)468 static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
469 {
470 bq24190_sysfs_init_attrs();
471
472 return sysfs_create_group(&bdi->charger.dev->kobj,
473 &bq24190_sysfs_attr_group);
474 }
475
bq24190_sysfs_remove_group(struct bq24190_dev_info * bdi)476 static void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi)
477 {
478 sysfs_remove_group(&bdi->charger.dev->kobj, &bq24190_sysfs_attr_group);
479 }
480 #else
bq24190_sysfs_create_group(struct bq24190_dev_info * bdi)481 static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
482 {
483 return 0;
484 }
485
bq24190_sysfs_remove_group(struct bq24190_dev_info * bdi)486 static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {}
487 #endif
488
489 /*
490 * According to the "Host Mode and default Mode" section of the
491 * manual, a write to any register causes the bq24190 to switch
492 * from default mode to host mode. It will switch back to default
493 * mode after a WDT timeout unless the WDT is turned off as well.
494 * So, by simply turning off the WDT, we accomplish both with the
495 * same write.
496 */
bq24190_set_mode_host(struct bq24190_dev_info * bdi)497 static int bq24190_set_mode_host(struct bq24190_dev_info *bdi)
498 {
499 int ret;
500 u8 v;
501
502 ret = bq24190_read(bdi, BQ24190_REG_CTTC, &v);
503 if (ret < 0)
504 return ret;
505
506 bdi->watchdog = ((v & BQ24190_REG_CTTC_WATCHDOG_MASK) >>
507 BQ24190_REG_CTTC_WATCHDOG_SHIFT);
508 v &= ~BQ24190_REG_CTTC_WATCHDOG_MASK;
509
510 return bq24190_write(bdi, BQ24190_REG_CTTC, v);
511 }
512
bq24190_register_reset(struct bq24190_dev_info * bdi)513 static int bq24190_register_reset(struct bq24190_dev_info *bdi)
514 {
515 int ret, limit = 100;
516 u8 v;
517
518 /* Reset the registers */
519 ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
520 BQ24190_REG_POC_RESET_MASK,
521 BQ24190_REG_POC_RESET_SHIFT,
522 0x1);
523 if (ret < 0)
524 return ret;
525
526 /* Reset bit will be cleared by hardware so poll until it is */
527 do {
528 ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
529 BQ24190_REG_POC_RESET_MASK,
530 BQ24190_REG_POC_RESET_SHIFT,
531 &v);
532 if (ret < 0)
533 return ret;
534
535 if (!v)
536 break;
537
538 udelay(10);
539 } while (--limit);
540
541 if (!limit)
542 return -EIO;
543
544 return 0;
545 }
546
547 /* Charger power supply property routines */
548
bq24190_charger_get_charge_type(struct bq24190_dev_info * bdi,union power_supply_propval * val)549 static int bq24190_charger_get_charge_type(struct bq24190_dev_info *bdi,
550 union power_supply_propval *val)
551 {
552 u8 v;
553 int type, ret;
554
555 ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
556 BQ24190_REG_POC_CHG_CONFIG_MASK,
557 BQ24190_REG_POC_CHG_CONFIG_SHIFT,
558 &v);
559 if (ret < 0)
560 return ret;
561
562 /* If POC[CHG_CONFIG] (REG01[5:4]) == 0, charge is disabled */
563 if (!v) {
564 type = POWER_SUPPLY_CHARGE_TYPE_NONE;
565 } else {
566 ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
567 BQ24190_REG_CCC_FORCE_20PCT_MASK,
568 BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
569 &v);
570 if (ret < 0)
571 return ret;
572
573 type = (v) ? POWER_SUPPLY_CHARGE_TYPE_TRICKLE :
574 POWER_SUPPLY_CHARGE_TYPE_FAST;
575 }
576
577 val->intval = type;
578
579 return 0;
580 }
581
bq24190_charger_set_charge_type(struct bq24190_dev_info * bdi,const union power_supply_propval * val)582 static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi,
583 const union power_supply_propval *val)
584 {
585 u8 chg_config, force_20pct, en_term;
586 int ret;
587
588 /*
589 * According to the "Termination when REG02[0] = 1" section of
590 * the bq24190 manual, the trickle charge could be less than the
591 * termination current so it recommends turning off the termination
592 * function.
593 *
594 * Note: AFAICT from the datasheet, the user will have to manually
595 * turn off the charging when in 20% mode. If its not turned off,
596 * there could be battery damage. So, use this mode at your own risk.
597 */
598 switch (val->intval) {
599 case POWER_SUPPLY_CHARGE_TYPE_NONE:
600 chg_config = 0x0;
601 break;
602 case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
603 chg_config = 0x1;
604 force_20pct = 0x1;
605 en_term = 0x0;
606 break;
607 case POWER_SUPPLY_CHARGE_TYPE_FAST:
608 chg_config = 0x1;
609 force_20pct = 0x0;
610 en_term = 0x1;
611 break;
612 default:
613 return -EINVAL;
614 }
615
616 if (chg_config) { /* Enabling the charger */
617 ret = bq24190_write_mask(bdi, BQ24190_REG_CCC,
618 BQ24190_REG_CCC_FORCE_20PCT_MASK,
619 BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
620 force_20pct);
621 if (ret < 0)
622 return ret;
623
624 ret = bq24190_write_mask(bdi, BQ24190_REG_CTTC,
625 BQ24190_REG_CTTC_EN_TERM_MASK,
626 BQ24190_REG_CTTC_EN_TERM_SHIFT,
627 en_term);
628 if (ret < 0)
629 return ret;
630 }
631
632 return bq24190_write_mask(bdi, BQ24190_REG_POC,
633 BQ24190_REG_POC_CHG_CONFIG_MASK,
634 BQ24190_REG_POC_CHG_CONFIG_SHIFT, chg_config);
635 }
636
bq24190_charger_get_health(struct bq24190_dev_info * bdi,union power_supply_propval * val)637 static int bq24190_charger_get_health(struct bq24190_dev_info *bdi,
638 union power_supply_propval *val)
639 {
640 u8 v;
641 int health, ret;
642
643 mutex_lock(&bdi->f_reg_lock);
644
645 if (bdi->charger_health_valid) {
646 v = bdi->f_reg;
647 bdi->charger_health_valid = false;
648 mutex_unlock(&bdi->f_reg_lock);
649 } else {
650 mutex_unlock(&bdi->f_reg_lock);
651
652 ret = bq24190_read(bdi, BQ24190_REG_F, &v);
653 if (ret < 0)
654 return ret;
655 }
656
657 if (v & BQ24190_REG_F_BOOST_FAULT_MASK) {
658 /*
659 * This could be over-current or over-voltage but there's
660 * no way to tell which. Return 'OVERVOLTAGE' since there
661 * isn't an 'OVERCURRENT' value defined that we can return
662 * even if it was over-current.
663 */
664 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
665 } else {
666 v &= BQ24190_REG_F_CHRG_FAULT_MASK;
667 v >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
668
669 switch (v) {
670 case 0x0: /* Normal */
671 health = POWER_SUPPLY_HEALTH_GOOD;
672 break;
673 case 0x1: /* Input Fault (VBUS OVP or VBAT<VBUS<3.8V) */
674 /*
675 * This could be over-voltage or under-voltage
676 * and there's no way to tell which. Instead
677 * of looking foolish and returning 'OVERVOLTAGE'
678 * when its really under-voltage, just return
679 * 'UNSPEC_FAILURE'.
680 */
681 health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
682 break;
683 case 0x2: /* Thermal Shutdown */
684 health = POWER_SUPPLY_HEALTH_OVERHEAT;
685 break;
686 case 0x3: /* Charge Safety Timer Expiration */
687 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
688 break;
689 default:
690 health = POWER_SUPPLY_HEALTH_UNKNOWN;
691 }
692 }
693
694 val->intval = health;
695
696 return 0;
697 }
698
bq24190_charger_get_online(struct bq24190_dev_info * bdi,union power_supply_propval * val)699 static int bq24190_charger_get_online(struct bq24190_dev_info *bdi,
700 union power_supply_propval *val)
701 {
702 u8 v;
703 int ret;
704
705 ret = bq24190_read_mask(bdi, BQ24190_REG_SS,
706 BQ24190_REG_SS_PG_STAT_MASK,
707 BQ24190_REG_SS_PG_STAT_SHIFT, &v);
708 if (ret < 0)
709 return ret;
710
711 val->intval = v;
712 return 0;
713 }
714
bq24190_charger_get_current(struct bq24190_dev_info * bdi,union power_supply_propval * val)715 static int bq24190_charger_get_current(struct bq24190_dev_info *bdi,
716 union power_supply_propval *val)
717 {
718 u8 v;
719 int curr, ret;
720
721 ret = bq24190_get_field_val(bdi, BQ24190_REG_CCC,
722 BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
723 bq24190_ccc_ichg_values,
724 ARRAY_SIZE(bq24190_ccc_ichg_values), &curr);
725 if (ret < 0)
726 return ret;
727
728 ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
729 BQ24190_REG_CCC_FORCE_20PCT_MASK,
730 BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
731 if (ret < 0)
732 return ret;
733
734 /* If FORCE_20PCT is enabled, then current is 20% of ICHG value */
735 if (v)
736 curr /= 5;
737
738 val->intval = curr;
739 return 0;
740 }
741
bq24190_charger_get_current_max(struct bq24190_dev_info * bdi,union power_supply_propval * val)742 static int bq24190_charger_get_current_max(struct bq24190_dev_info *bdi,
743 union power_supply_propval *val)
744 {
745 int idx = ARRAY_SIZE(bq24190_ccc_ichg_values) - 1;
746
747 val->intval = bq24190_ccc_ichg_values[idx];
748 return 0;
749 }
750
bq24190_charger_set_current(struct bq24190_dev_info * bdi,const union power_supply_propval * val)751 static int bq24190_charger_set_current(struct bq24190_dev_info *bdi,
752 const union power_supply_propval *val)
753 {
754 u8 v;
755 int ret, curr = val->intval;
756
757 ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
758 BQ24190_REG_CCC_FORCE_20PCT_MASK,
759 BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
760 if (ret < 0)
761 return ret;
762
763 /* If FORCE_20PCT is enabled, have to multiply value passed in by 5 */
764 if (v)
765 curr *= 5;
766
767 return bq24190_set_field_val(bdi, BQ24190_REG_CCC,
768 BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
769 bq24190_ccc_ichg_values,
770 ARRAY_SIZE(bq24190_ccc_ichg_values), curr);
771 }
772
bq24190_charger_get_voltage(struct bq24190_dev_info * bdi,union power_supply_propval * val)773 static int bq24190_charger_get_voltage(struct bq24190_dev_info *bdi,
774 union power_supply_propval *val)
775 {
776 int voltage, ret;
777
778 ret = bq24190_get_field_val(bdi, BQ24190_REG_CVC,
779 BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
780 bq24190_cvc_vreg_values,
781 ARRAY_SIZE(bq24190_cvc_vreg_values), &voltage);
782 if (ret < 0)
783 return ret;
784
785 val->intval = voltage;
786 return 0;
787 }
788
bq24190_charger_get_voltage_max(struct bq24190_dev_info * bdi,union power_supply_propval * val)789 static int bq24190_charger_get_voltage_max(struct bq24190_dev_info *bdi,
790 union power_supply_propval *val)
791 {
792 int idx = ARRAY_SIZE(bq24190_cvc_vreg_values) - 1;
793
794 val->intval = bq24190_cvc_vreg_values[idx];
795 return 0;
796 }
797
bq24190_charger_set_voltage(struct bq24190_dev_info * bdi,const union power_supply_propval * val)798 static int bq24190_charger_set_voltage(struct bq24190_dev_info *bdi,
799 const union power_supply_propval *val)
800 {
801 return bq24190_set_field_val(bdi, BQ24190_REG_CVC,
802 BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
803 bq24190_cvc_vreg_values,
804 ARRAY_SIZE(bq24190_cvc_vreg_values), val->intval);
805 }
806
bq24190_charger_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)807 static int bq24190_charger_get_property(struct power_supply *psy,
808 enum power_supply_property psp, union power_supply_propval *val)
809 {
810 struct bq24190_dev_info *bdi =
811 container_of(psy, struct bq24190_dev_info, charger);
812 int ret;
813
814 dev_dbg(bdi->dev, "prop: %d\n", psp);
815
816 pm_runtime_get_sync(bdi->dev);
817
818 switch (psp) {
819 case POWER_SUPPLY_PROP_CHARGE_TYPE:
820 ret = bq24190_charger_get_charge_type(bdi, val);
821 break;
822 case POWER_SUPPLY_PROP_HEALTH:
823 ret = bq24190_charger_get_health(bdi, val);
824 break;
825 case POWER_SUPPLY_PROP_ONLINE:
826 ret = bq24190_charger_get_online(bdi, val);
827 break;
828 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
829 ret = bq24190_charger_get_current(bdi, val);
830 break;
831 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
832 ret = bq24190_charger_get_current_max(bdi, val);
833 break;
834 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
835 ret = bq24190_charger_get_voltage(bdi, val);
836 break;
837 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
838 ret = bq24190_charger_get_voltage_max(bdi, val);
839 break;
840 case POWER_SUPPLY_PROP_SCOPE:
841 val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
842 ret = 0;
843 break;
844 case POWER_SUPPLY_PROP_MODEL_NAME:
845 val->strval = bdi->model_name;
846 ret = 0;
847 break;
848 case POWER_SUPPLY_PROP_MANUFACTURER:
849 val->strval = BQ24190_MANUFACTURER;
850 ret = 0;
851 break;
852 default:
853 ret = -ENODATA;
854 }
855
856 pm_runtime_put_sync(bdi->dev);
857 return ret;
858 }
859
bq24190_charger_set_property(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)860 static int bq24190_charger_set_property(struct power_supply *psy,
861 enum power_supply_property psp,
862 const union power_supply_propval *val)
863 {
864 struct bq24190_dev_info *bdi =
865 container_of(psy, struct bq24190_dev_info, charger);
866 int ret;
867
868 dev_dbg(bdi->dev, "prop: %d\n", psp);
869
870 pm_runtime_get_sync(bdi->dev);
871
872 switch (psp) {
873 case POWER_SUPPLY_PROP_CHARGE_TYPE:
874 ret = bq24190_charger_set_charge_type(bdi, val);
875 break;
876 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
877 ret = bq24190_charger_set_current(bdi, val);
878 break;
879 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
880 ret = bq24190_charger_set_voltage(bdi, val);
881 break;
882 default:
883 ret = -EINVAL;
884 }
885
886 pm_runtime_put_sync(bdi->dev);
887 return ret;
888 }
889
bq24190_charger_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)890 static int bq24190_charger_property_is_writeable(struct power_supply *psy,
891 enum power_supply_property psp)
892 {
893 int ret;
894
895 switch (psp) {
896 case POWER_SUPPLY_PROP_CHARGE_TYPE:
897 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
898 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
899 ret = 1;
900 break;
901 default:
902 ret = 0;
903 }
904
905 return ret;
906 }
907
908 static enum power_supply_property bq24190_charger_properties[] = {
909 POWER_SUPPLY_PROP_TYPE,
910 POWER_SUPPLY_PROP_HEALTH,
911 POWER_SUPPLY_PROP_ONLINE,
912 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
913 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
914 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
915 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
916 POWER_SUPPLY_PROP_SCOPE,
917 POWER_SUPPLY_PROP_MODEL_NAME,
918 POWER_SUPPLY_PROP_MANUFACTURER,
919 };
920
921 static char *bq24190_charger_supplied_to[] = {
922 "main-battery",
923 };
924
bq24190_charger_init(struct power_supply * charger)925 static void bq24190_charger_init(struct power_supply *charger)
926 {
927 charger->name = "bq24190-charger";
928 charger->type = POWER_SUPPLY_TYPE_USB;
929 charger->properties = bq24190_charger_properties;
930 charger->num_properties = ARRAY_SIZE(bq24190_charger_properties);
931 charger->supplied_to = bq24190_charger_supplied_to;
932 charger->num_supplicants = ARRAY_SIZE(bq24190_charger_supplied_to);
933 charger->get_property = bq24190_charger_get_property;
934 charger->set_property = bq24190_charger_set_property;
935 charger->property_is_writeable = bq24190_charger_property_is_writeable;
936 }
937
938 /* Battery power supply property routines */
939
bq24190_battery_get_status(struct bq24190_dev_info * bdi,union power_supply_propval * val)940 static int bq24190_battery_get_status(struct bq24190_dev_info *bdi,
941 union power_supply_propval *val)
942 {
943 u8 ss_reg, chrg_fault;
944 int status, ret;
945
946 mutex_lock(&bdi->f_reg_lock);
947
948 if (bdi->battery_status_valid) {
949 chrg_fault = bdi->f_reg;
950 bdi->battery_status_valid = false;
951 mutex_unlock(&bdi->f_reg_lock);
952 } else {
953 mutex_unlock(&bdi->f_reg_lock);
954
955 ret = bq24190_read(bdi, BQ24190_REG_F, &chrg_fault);
956 if (ret < 0)
957 return ret;
958 }
959
960 chrg_fault &= BQ24190_REG_F_CHRG_FAULT_MASK;
961 chrg_fault >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
962
963 ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
964 if (ret < 0)
965 return ret;
966
967 /*
968 * The battery must be discharging when any of these are true:
969 * - there is no good power source;
970 * - there is a charge fault.
971 * Could also be discharging when in "supplement mode" but
972 * there is no way to tell when its in that mode.
973 */
974 if (!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK) || chrg_fault) {
975 status = POWER_SUPPLY_STATUS_DISCHARGING;
976 } else {
977 ss_reg &= BQ24190_REG_SS_CHRG_STAT_MASK;
978 ss_reg >>= BQ24190_REG_SS_CHRG_STAT_SHIFT;
979
980 switch (ss_reg) {
981 case 0x0: /* Not Charging */
982 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
983 break;
984 case 0x1: /* Pre-charge */
985 case 0x2: /* Fast Charging */
986 status = POWER_SUPPLY_STATUS_CHARGING;
987 break;
988 case 0x3: /* Charge Termination Done */
989 status = POWER_SUPPLY_STATUS_FULL;
990 break;
991 default:
992 ret = -EIO;
993 }
994 }
995
996 if (!ret)
997 val->intval = status;
998
999 return ret;
1000 }
1001
bq24190_battery_get_health(struct bq24190_dev_info * bdi,union power_supply_propval * val)1002 static int bq24190_battery_get_health(struct bq24190_dev_info *bdi,
1003 union power_supply_propval *val)
1004 {
1005 u8 v;
1006 int health, ret;
1007
1008 mutex_lock(&bdi->f_reg_lock);
1009
1010 if (bdi->battery_health_valid) {
1011 v = bdi->f_reg;
1012 bdi->battery_health_valid = false;
1013 mutex_unlock(&bdi->f_reg_lock);
1014 } else {
1015 mutex_unlock(&bdi->f_reg_lock);
1016
1017 ret = bq24190_read(bdi, BQ24190_REG_F, &v);
1018 if (ret < 0)
1019 return ret;
1020 }
1021
1022 if (v & BQ24190_REG_F_BAT_FAULT_MASK) {
1023 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
1024 } else {
1025 v &= BQ24190_REG_F_NTC_FAULT_MASK;
1026 v >>= BQ24190_REG_F_NTC_FAULT_SHIFT;
1027
1028 switch (v) {
1029 case 0x0: /* Normal */
1030 health = POWER_SUPPLY_HEALTH_GOOD;
1031 break;
1032 case 0x1: /* TS1 Cold */
1033 case 0x3: /* TS2 Cold */
1034 case 0x5: /* Both Cold */
1035 health = POWER_SUPPLY_HEALTH_COLD;
1036 break;
1037 case 0x2: /* TS1 Hot */
1038 case 0x4: /* TS2 Hot */
1039 case 0x6: /* Both Hot */
1040 health = POWER_SUPPLY_HEALTH_OVERHEAT;
1041 break;
1042 default:
1043 health = POWER_SUPPLY_HEALTH_UNKNOWN;
1044 }
1045 }
1046
1047 val->intval = health;
1048 return 0;
1049 }
1050
bq24190_battery_get_online(struct bq24190_dev_info * bdi,union power_supply_propval * val)1051 static int bq24190_battery_get_online(struct bq24190_dev_info *bdi,
1052 union power_supply_propval *val)
1053 {
1054 u8 batfet_disable;
1055 int ret;
1056
1057 ret = bq24190_read_mask(bdi, BQ24190_REG_MOC,
1058 BQ24190_REG_MOC_BATFET_DISABLE_MASK,
1059 BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, &batfet_disable);
1060 if (ret < 0)
1061 return ret;
1062
1063 val->intval = !batfet_disable;
1064 return 0;
1065 }
1066
bq24190_battery_set_online(struct bq24190_dev_info * bdi,const union power_supply_propval * val)1067 static int bq24190_battery_set_online(struct bq24190_dev_info *bdi,
1068 const union power_supply_propval *val)
1069 {
1070 return bq24190_write_mask(bdi, BQ24190_REG_MOC,
1071 BQ24190_REG_MOC_BATFET_DISABLE_MASK,
1072 BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, !val->intval);
1073 }
1074
bq24190_battery_get_temp_alert_max(struct bq24190_dev_info * bdi,union power_supply_propval * val)1075 static int bq24190_battery_get_temp_alert_max(struct bq24190_dev_info *bdi,
1076 union power_supply_propval *val)
1077 {
1078 int temp, ret;
1079
1080 ret = bq24190_get_field_val(bdi, BQ24190_REG_ICTRC,
1081 BQ24190_REG_ICTRC_TREG_MASK,
1082 BQ24190_REG_ICTRC_TREG_SHIFT,
1083 bq24190_ictrc_treg_values,
1084 ARRAY_SIZE(bq24190_ictrc_treg_values), &temp);
1085 if (ret < 0)
1086 return ret;
1087
1088 val->intval = temp;
1089 return 0;
1090 }
1091
bq24190_battery_set_temp_alert_max(struct bq24190_dev_info * bdi,const union power_supply_propval * val)1092 static int bq24190_battery_set_temp_alert_max(struct bq24190_dev_info *bdi,
1093 const union power_supply_propval *val)
1094 {
1095 return bq24190_set_field_val(bdi, BQ24190_REG_ICTRC,
1096 BQ24190_REG_ICTRC_TREG_MASK,
1097 BQ24190_REG_ICTRC_TREG_SHIFT,
1098 bq24190_ictrc_treg_values,
1099 ARRAY_SIZE(bq24190_ictrc_treg_values), val->intval);
1100 }
1101
bq24190_battery_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)1102 static int bq24190_battery_get_property(struct power_supply *psy,
1103 enum power_supply_property psp, union power_supply_propval *val)
1104 {
1105 struct bq24190_dev_info *bdi =
1106 container_of(psy, struct bq24190_dev_info, battery);
1107 int ret;
1108
1109 dev_dbg(bdi->dev, "prop: %d\n", psp);
1110
1111 pm_runtime_get_sync(bdi->dev);
1112
1113 switch (psp) {
1114 case POWER_SUPPLY_PROP_STATUS:
1115 ret = bq24190_battery_get_status(bdi, val);
1116 break;
1117 case POWER_SUPPLY_PROP_HEALTH:
1118 ret = bq24190_battery_get_health(bdi, val);
1119 break;
1120 case POWER_SUPPLY_PROP_ONLINE:
1121 ret = bq24190_battery_get_online(bdi, val);
1122 break;
1123 case POWER_SUPPLY_PROP_TECHNOLOGY:
1124 /* Could be Li-on or Li-polymer but no way to tell which */
1125 val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
1126 ret = 0;
1127 break;
1128 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
1129 ret = bq24190_battery_get_temp_alert_max(bdi, val);
1130 break;
1131 case POWER_SUPPLY_PROP_SCOPE:
1132 val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
1133 ret = 0;
1134 break;
1135 default:
1136 ret = -ENODATA;
1137 }
1138
1139 pm_runtime_put_sync(bdi->dev);
1140 return ret;
1141 }
1142
bq24190_battery_set_property(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)1143 static int bq24190_battery_set_property(struct power_supply *psy,
1144 enum power_supply_property psp,
1145 const union power_supply_propval *val)
1146 {
1147 struct bq24190_dev_info *bdi =
1148 container_of(psy, struct bq24190_dev_info, battery);
1149 int ret;
1150
1151 dev_dbg(bdi->dev, "prop: %d\n", psp);
1152
1153 pm_runtime_put_sync(bdi->dev);
1154
1155 switch (psp) {
1156 case POWER_SUPPLY_PROP_ONLINE:
1157 ret = bq24190_battery_set_online(bdi, val);
1158 break;
1159 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
1160 ret = bq24190_battery_set_temp_alert_max(bdi, val);
1161 break;
1162 default:
1163 ret = -EINVAL;
1164 }
1165
1166 pm_runtime_put_sync(bdi->dev);
1167 return ret;
1168 }
1169
bq24190_battery_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)1170 static int bq24190_battery_property_is_writeable(struct power_supply *psy,
1171 enum power_supply_property psp)
1172 {
1173 int ret;
1174
1175 switch (psp) {
1176 case POWER_SUPPLY_PROP_ONLINE:
1177 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
1178 ret = 1;
1179 break;
1180 default:
1181 ret = 0;
1182 }
1183
1184 return ret;
1185 }
1186
1187 static enum power_supply_property bq24190_battery_properties[] = {
1188 POWER_SUPPLY_PROP_STATUS,
1189 POWER_SUPPLY_PROP_HEALTH,
1190 POWER_SUPPLY_PROP_ONLINE,
1191 POWER_SUPPLY_PROP_TECHNOLOGY,
1192 POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
1193 POWER_SUPPLY_PROP_SCOPE,
1194 };
1195
bq24190_battery_init(struct power_supply * battery)1196 static void bq24190_battery_init(struct power_supply *battery)
1197 {
1198 battery->name = "bq24190-battery";
1199 battery->type = POWER_SUPPLY_TYPE_BATTERY;
1200 battery->properties = bq24190_battery_properties;
1201 battery->num_properties = ARRAY_SIZE(bq24190_battery_properties);
1202 battery->get_property = bq24190_battery_get_property;
1203 battery->set_property = bq24190_battery_set_property;
1204 battery->property_is_writeable = bq24190_battery_property_is_writeable;
1205 }
1206
bq24190_irq_handler_thread(int irq,void * data)1207 static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
1208 {
1209 struct bq24190_dev_info *bdi = data;
1210 bool alert_userspace = false;
1211 u8 ss_reg = 0, f_reg = 0;
1212 int ret;
1213
1214 pm_runtime_get_sync(bdi->dev);
1215
1216 ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
1217 if (ret < 0) {
1218 dev_err(bdi->dev, "Can't read SS reg: %d\n", ret);
1219 goto out;
1220 }
1221
1222 if (ss_reg != bdi->ss_reg) {
1223 /*
1224 * The device is in host mode so when PG_STAT goes from 1->0
1225 * (i.e., power removed) HIZ needs to be disabled.
1226 */
1227 if ((bdi->ss_reg & BQ24190_REG_SS_PG_STAT_MASK) &&
1228 !(ss_reg & BQ24190_REG_SS_PG_STAT_MASK)) {
1229 ret = bq24190_write_mask(bdi, BQ24190_REG_ISC,
1230 BQ24190_REG_ISC_EN_HIZ_MASK,
1231 BQ24190_REG_ISC_EN_HIZ_SHIFT,
1232 0);
1233 if (ret < 0)
1234 dev_err(bdi->dev, "Can't access ISC reg: %d\n",
1235 ret);
1236 }
1237
1238 bdi->ss_reg = ss_reg;
1239 alert_userspace = true;
1240 }
1241
1242 mutex_lock(&bdi->f_reg_lock);
1243
1244 ret = bq24190_read(bdi, BQ24190_REG_F, &f_reg);
1245 if (ret < 0) {
1246 mutex_unlock(&bdi->f_reg_lock);
1247 dev_err(bdi->dev, "Can't read F reg: %d\n", ret);
1248 goto out;
1249 }
1250
1251 if (f_reg != bdi->f_reg) {
1252 bdi->f_reg = f_reg;
1253 bdi->charger_health_valid = true;
1254 bdi->battery_health_valid = true;
1255 bdi->battery_status_valid = true;
1256
1257 alert_userspace = true;
1258 }
1259
1260 mutex_unlock(&bdi->f_reg_lock);
1261
1262 /*
1263 * Sometimes bq24190 gives a steady trickle of interrupts even
1264 * though the watchdog timer is turned off and neither the STATUS
1265 * nor FAULT registers have changed. Weed out these sprurious
1266 * interrupts so userspace isn't alerted for no reason.
1267 * In addition, the chip always generates an interrupt after
1268 * register reset so we should ignore that one (the very first
1269 * interrupt received).
1270 */
1271 if (alert_userspace && !bdi->first_time) {
1272 power_supply_changed(&bdi->charger);
1273 power_supply_changed(&bdi->battery);
1274 bdi->first_time = false;
1275 }
1276
1277 out:
1278 pm_runtime_put_sync(bdi->dev);
1279
1280 dev_dbg(bdi->dev, "ss_reg: 0x%02x, f_reg: 0x%02x\n", ss_reg, f_reg);
1281
1282 return IRQ_HANDLED;
1283 }
1284
bq24190_hw_init(struct bq24190_dev_info * bdi)1285 static int bq24190_hw_init(struct bq24190_dev_info *bdi)
1286 {
1287 u8 v;
1288 int ret;
1289
1290 pm_runtime_get_sync(bdi->dev);
1291
1292 /* First check that the device really is what its supposed to be */
1293 ret = bq24190_read_mask(bdi, BQ24190_REG_VPRS,
1294 BQ24190_REG_VPRS_PN_MASK,
1295 BQ24190_REG_VPRS_PN_SHIFT,
1296 &v);
1297 if (ret < 0)
1298 goto out;
1299
1300 if (v != bdi->model) {
1301 ret = -ENODEV;
1302 goto out;
1303 }
1304
1305 ret = bq24190_register_reset(bdi);
1306 if (ret < 0)
1307 goto out;
1308
1309 ret = bq24190_set_mode_host(bdi);
1310 out:
1311 pm_runtime_put_sync(bdi->dev);
1312 return ret;
1313 }
1314
1315 #ifdef CONFIG_OF
bq24190_setup_dt(struct bq24190_dev_info * bdi)1316 static int bq24190_setup_dt(struct bq24190_dev_info *bdi)
1317 {
1318 bdi->irq = irq_of_parse_and_map(bdi->dev->of_node, 0);
1319 if (bdi->irq <= 0)
1320 return -1;
1321
1322 return 0;
1323 }
1324 #else
bq24190_setup_dt(struct bq24190_dev_info * bdi)1325 static int bq24190_setup_dt(struct bq24190_dev_info *bdi)
1326 {
1327 return -1;
1328 }
1329 #endif
1330
bq24190_setup_pdata(struct bq24190_dev_info * bdi,struct bq24190_platform_data * pdata)1331 static int bq24190_setup_pdata(struct bq24190_dev_info *bdi,
1332 struct bq24190_platform_data *pdata)
1333 {
1334 int ret;
1335
1336 if (!gpio_is_valid(pdata->gpio_int))
1337 return -1;
1338
1339 ret = gpio_request(pdata->gpio_int, dev_name(bdi->dev));
1340 if (ret < 0)
1341 return -1;
1342
1343 ret = gpio_direction_input(pdata->gpio_int);
1344 if (ret < 0)
1345 goto out;
1346
1347 bdi->irq = gpio_to_irq(pdata->gpio_int);
1348 if (!bdi->irq)
1349 goto out;
1350
1351 bdi->gpio_int = pdata->gpio_int;
1352 return 0;
1353
1354 out:
1355 gpio_free(pdata->gpio_int);
1356 return -1;
1357 }
1358
bq24190_probe(struct i2c_client * client,const struct i2c_device_id * id)1359 static int bq24190_probe(struct i2c_client *client,
1360 const struct i2c_device_id *id)
1361 {
1362 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1363 struct device *dev = &client->dev;
1364 struct bq24190_platform_data *pdata = client->dev.platform_data;
1365 struct bq24190_dev_info *bdi;
1366 int ret;
1367
1368 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1369 dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
1370 return -ENODEV;
1371 }
1372
1373 bdi = devm_kzalloc(dev, sizeof(*bdi), GFP_KERNEL);
1374 if (!bdi) {
1375 dev_err(dev, "Can't alloc bdi struct\n");
1376 return -ENOMEM;
1377 }
1378
1379 bdi->client = client;
1380 bdi->dev = dev;
1381 bdi->model = id->driver_data;
1382 strncpy(bdi->model_name, id->name, I2C_NAME_SIZE);
1383 mutex_init(&bdi->f_reg_lock);
1384 bdi->first_time = true;
1385 bdi->charger_health_valid = false;
1386 bdi->battery_health_valid = false;
1387 bdi->battery_status_valid = false;
1388
1389 i2c_set_clientdata(client, bdi);
1390
1391 if (dev->of_node)
1392 ret = bq24190_setup_dt(bdi);
1393 else
1394 ret = bq24190_setup_pdata(bdi, pdata);
1395
1396 if (ret) {
1397 dev_err(dev, "Can't get irq info\n");
1398 return -EINVAL;
1399 }
1400
1401 ret = devm_request_threaded_irq(dev, bdi->irq, NULL,
1402 bq24190_irq_handler_thread,
1403 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1404 "bq24190-charger", bdi);
1405 if (ret < 0) {
1406 dev_err(dev, "Can't set up irq handler\n");
1407 goto out1;
1408 }
1409
1410 pm_runtime_enable(dev);
1411 pm_runtime_resume(dev);
1412
1413 ret = bq24190_hw_init(bdi);
1414 if (ret < 0) {
1415 dev_err(dev, "Hardware init failed\n");
1416 goto out2;
1417 }
1418
1419 bq24190_charger_init(&bdi->charger);
1420
1421 ret = power_supply_register(dev, &bdi->charger);
1422 if (ret) {
1423 dev_err(dev, "Can't register charger\n");
1424 goto out2;
1425 }
1426
1427 bq24190_battery_init(&bdi->battery);
1428
1429 ret = power_supply_register(dev, &bdi->battery);
1430 if (ret) {
1431 dev_err(dev, "Can't register battery\n");
1432 goto out3;
1433 }
1434
1435 ret = bq24190_sysfs_create_group(bdi);
1436 if (ret) {
1437 dev_err(dev, "Can't create sysfs entries\n");
1438 goto out4;
1439 }
1440
1441 return 0;
1442
1443 out4:
1444 power_supply_unregister(&bdi->battery);
1445 out3:
1446 power_supply_unregister(&bdi->charger);
1447 out2:
1448 pm_runtime_disable(dev);
1449 out1:
1450 if (bdi->gpio_int)
1451 gpio_free(bdi->gpio_int);
1452
1453 return ret;
1454 }
1455
bq24190_remove(struct i2c_client * client)1456 static int bq24190_remove(struct i2c_client *client)
1457 {
1458 struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
1459
1460 pm_runtime_get_sync(bdi->dev);
1461 bq24190_register_reset(bdi);
1462 pm_runtime_put_sync(bdi->dev);
1463
1464 bq24190_sysfs_remove_group(bdi);
1465 power_supply_unregister(&bdi->battery);
1466 power_supply_unregister(&bdi->charger);
1467 pm_runtime_disable(bdi->dev);
1468
1469 if (bdi->gpio_int)
1470 gpio_free(bdi->gpio_int);
1471
1472 return 0;
1473 }
1474
1475 #ifdef CONFIG_PM_SLEEP
bq24190_pm_suspend(struct device * dev)1476 static int bq24190_pm_suspend(struct device *dev)
1477 {
1478 struct i2c_client *client = to_i2c_client(dev);
1479 struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
1480
1481 pm_runtime_get_sync(bdi->dev);
1482 bq24190_register_reset(bdi);
1483 pm_runtime_put_sync(bdi->dev);
1484
1485 return 0;
1486 }
1487
bq24190_pm_resume(struct device * dev)1488 static int bq24190_pm_resume(struct device *dev)
1489 {
1490 struct i2c_client *client = to_i2c_client(dev);
1491 struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
1492
1493 bdi->charger_health_valid = false;
1494 bdi->battery_health_valid = false;
1495 bdi->battery_status_valid = false;
1496
1497 pm_runtime_get_sync(bdi->dev);
1498 bq24190_register_reset(bdi);
1499 bq24190_set_mode_host(bdi);
1500 pm_runtime_put_sync(bdi->dev);
1501
1502 /* Things may have changed while suspended so alert upper layer */
1503 power_supply_changed(&bdi->charger);
1504 power_supply_changed(&bdi->battery);
1505
1506 return 0;
1507 }
1508 #endif
1509
1510 static SIMPLE_DEV_PM_OPS(bq24190_pm_ops, bq24190_pm_suspend, bq24190_pm_resume);
1511
1512 /*
1513 * Only support the bq24190 right now. The bq24192, bq24192i, and bq24193
1514 * are similar but not identical so the driver needs to be extended to
1515 * support them.
1516 */
1517 static const struct i2c_device_id bq24190_i2c_ids[] = {
1518 { "bq24190", BQ24190_REG_VPRS_PN_24190 },
1519 { },
1520 };
1521
1522 #ifdef CONFIG_OF
1523 static const struct of_device_id bq24190_of_match[] = {
1524 { .compatible = "ti,bq24190", },
1525 { },
1526 };
1527 MODULE_DEVICE_TABLE(of, bq24190_of_match);
1528 #else
1529 static const struct of_device_id bq24190_of_match[] = {
1530 { },
1531 };
1532 #endif
1533
1534 static struct i2c_driver bq24190_driver = {
1535 .probe = bq24190_probe,
1536 .remove = bq24190_remove,
1537 .id_table = bq24190_i2c_ids,
1538 .driver = {
1539 .name = "bq24190-charger",
1540 .owner = THIS_MODULE,
1541 .pm = &bq24190_pm_ops,
1542 .of_match_table = of_match_ptr(bq24190_of_match),
1543 },
1544 };
1545 module_i2c_driver(bq24190_driver);
1546
1547 MODULE_LICENSE("GPL");
1548 MODULE_AUTHOR("Mark A. Greer <mgreer@animalcreek.com>");
1549 MODULE_ALIAS("i2c:bq24190-charger");
1550 MODULE_DESCRIPTION("TI BQ24190 Charger Driver");
1551