Commit | Line | Data |
---|---|---|
5a5bf490 TB |
1 | /* |
2 | * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver | |
3 | * | |
4 | * Copyright (C) 2014 Intel Corporation | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/workqueue.h> | |
27 | #include <linux/mfd/axp20x.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/power_supply.h> | |
30 | #include <linux/iio/consumer.h> | |
31 | #include <linux/debugfs.h> | |
32 | #include <linux/seq_file.h> | |
33 | ||
34 | #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) | |
35 | #define CHRG_STAT_BAT_VALID (1 << 4) | |
36 | #define CHRG_STAT_BAT_PRESENT (1 << 5) | |
37 | #define CHRG_STAT_CHARGING (1 << 6) | |
38 | #define CHRG_STAT_PMIC_OTP (1 << 7) | |
39 | ||
40 | #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ | |
41 | #define CHRG_CCCV_CC_BIT_POS 0 | |
42 | #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ | |
43 | #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ | |
44 | #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ | |
45 | #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ | |
46 | #define CHRG_CCCV_CV_BIT_POS 5 | |
47 | #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ | |
48 | #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ | |
49 | #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ | |
50 | #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ | |
51 | #define CHRG_CCCV_CHG_EN (1 << 7) | |
52 | ||
53 | #define CV_4100 4100 /* 4100mV */ | |
54 | #define CV_4150 4150 /* 4150mV */ | |
55 | #define CV_4200 4200 /* 4200mV */ | |
56 | #define CV_4350 4350 /* 4350mV */ | |
57 | ||
58 | #define TEMP_IRQ_CFG_QWBTU (1 << 0) | |
59 | #define TEMP_IRQ_CFG_WBTU (1 << 1) | |
60 | #define TEMP_IRQ_CFG_QWBTO (1 << 2) | |
61 | #define TEMP_IRQ_CFG_WBTO (1 << 3) | |
62 | #define TEMP_IRQ_CFG_MASK 0xf | |
63 | ||
64 | #define FG_IRQ_CFG_LOWBATT_WL2 (1 << 0) | |
65 | #define FG_IRQ_CFG_LOWBATT_WL1 (1 << 1) | |
66 | #define FG_IRQ_CFG_LOWBATT_MASK 0x3 | |
67 | #define LOWBAT_IRQ_STAT_LOWBATT_WL2 (1 << 0) | |
68 | #define LOWBAT_IRQ_STAT_LOWBATT_WL1 (1 << 1) | |
69 | ||
70 | #define FG_CNTL_OCV_ADJ_STAT (1 << 2) | |
71 | #define FG_CNTL_OCV_ADJ_EN (1 << 3) | |
72 | #define FG_CNTL_CAP_ADJ_STAT (1 << 4) | |
73 | #define FG_CNTL_CAP_ADJ_EN (1 << 5) | |
74 | #define FG_CNTL_CC_EN (1 << 6) | |
75 | #define FG_CNTL_GAUGE_EN (1 << 7) | |
76 | ||
77 | #define FG_REP_CAP_VALID (1 << 7) | |
78 | #define FG_REP_CAP_VAL_MASK 0x7F | |
79 | ||
80 | #define FG_DES_CAP1_VALID (1 << 7) | |
81 | #define FG_DES_CAP1_VAL_MASK 0x7F | |
82 | #define FG_DES_CAP0_VAL_MASK 0xFF | |
83 | #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ | |
84 | ||
85 | #define FG_CC_MTR1_VALID (1 << 7) | |
86 | #define FG_CC_MTR1_VAL_MASK 0x7F | |
87 | #define FG_CC_MTR0_VAL_MASK 0xFF | |
88 | #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */ | |
89 | ||
90 | #define FG_OCV_CAP_VALID (1 << 7) | |
91 | #define FG_OCV_CAP_VAL_MASK 0x7F | |
92 | #define FG_CC_CAP_VALID (1 << 7) | |
93 | #define FG_CC_CAP_VAL_MASK 0x7F | |
94 | ||
95 | #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */ | |
96 | #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */ | |
97 | #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */ | |
98 | #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */ | |
99 | #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */ | |
100 | #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */ | |
101 | ||
102 | #define STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */ | |
103 | #define NR_RETRY_CNT 3 | |
104 | #define DEV_NAME "axp288_fuel_gauge" | |
105 | ||
106 | /* 1.1mV per LSB expressed in uV */ | |
107 | #define VOLTAGE_FROM_ADC(a) ((a * 11) / 10) | |
108 | /* properties converted to tenths of degrees, uV, uA, uW */ | |
109 | #define PROP_TEMP(a) ((a) * 10) | |
110 | #define UNPROP_TEMP(a) ((a) / 10) | |
111 | #define PROP_VOLT(a) ((a) * 1000) | |
112 | #define PROP_CURR(a) ((a) * 1000) | |
113 | ||
114 | #define AXP288_FG_INTR_NUM 6 | |
115 | enum { | |
116 | QWBTU_IRQ = 0, | |
117 | WBTU_IRQ, | |
118 | QWBTO_IRQ, | |
119 | WBTO_IRQ, | |
120 | WL2_IRQ, | |
121 | WL1_IRQ, | |
122 | }; | |
123 | ||
124 | struct axp288_fg_info { | |
125 | struct platform_device *pdev; | |
126 | struct axp20x_fg_pdata *pdata; | |
127 | struct regmap *regmap; | |
128 | struct regmap_irq_chip_data *regmap_irqc; | |
129 | int irq[AXP288_FG_INTR_NUM]; | |
297d716f | 130 | struct power_supply *bat; |
5a5bf490 TB |
131 | struct mutex lock; |
132 | int status; | |
133 | struct delayed_work status_monitor; | |
134 | struct dentry *debug_file; | |
135 | }; | |
136 | ||
137 | static enum power_supply_property fuel_gauge_props[] = { | |
138 | POWER_SUPPLY_PROP_STATUS, | |
139 | POWER_SUPPLY_PROP_PRESENT, | |
140 | POWER_SUPPLY_PROP_HEALTH, | |
141 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
142 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
143 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
144 | POWER_SUPPLY_PROP_VOLTAGE_OCV, | |
145 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
146 | POWER_SUPPLY_PROP_CAPACITY, | |
147 | POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, | |
148 | POWER_SUPPLY_PROP_TEMP, | |
149 | POWER_SUPPLY_PROP_TEMP_MAX, | |
150 | POWER_SUPPLY_PROP_TEMP_MIN, | |
151 | POWER_SUPPLY_PROP_TEMP_ALERT_MIN, | |
152 | POWER_SUPPLY_PROP_TEMP_ALERT_MAX, | |
153 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
154 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
155 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
156 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
157 | POWER_SUPPLY_PROP_MODEL_NAME, | |
158 | }; | |
159 | ||
160 | static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) | |
161 | { | |
162 | int ret, i; | |
163 | unsigned int val; | |
164 | ||
165 | for (i = 0; i < NR_RETRY_CNT; i++) { | |
166 | ret = regmap_read(info->regmap, reg, &val); | |
167 | if (ret == -EBUSY) | |
168 | continue; | |
169 | else | |
170 | break; | |
171 | } | |
172 | ||
173 | if (ret < 0) | |
174 | dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret); | |
175 | ||
176 | return val; | |
177 | } | |
178 | ||
179 | static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val) | |
180 | { | |
181 | int ret; | |
182 | ||
183 | ret = regmap_write(info->regmap, reg, (unsigned int)val); | |
184 | ||
185 | if (ret < 0) | |
186 | dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret); | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
191 | static int pmic_read_adc_val(const char *name, int *raw_val, | |
192 | struct axp288_fg_info *info) | |
193 | { | |
194 | int ret, val = 0; | |
195 | struct iio_channel *indio_chan; | |
196 | ||
197 | indio_chan = iio_channel_get(NULL, name); | |
198 | if (IS_ERR_OR_NULL(indio_chan)) { | |
199 | ret = PTR_ERR(indio_chan); | |
200 | goto exit; | |
201 | } | |
202 | ret = iio_read_channel_raw(indio_chan, &val); | |
203 | if (ret < 0) { | |
204 | dev_err(&info->pdev->dev, | |
205 | "IIO channel read error: %x, %x\n", ret, val); | |
206 | goto err_exit; | |
207 | } | |
208 | ||
209 | dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val); | |
210 | *raw_val = val; | |
211 | ||
212 | err_exit: | |
213 | iio_channel_release(indio_chan); | |
214 | exit: | |
215 | return ret; | |
216 | } | |
217 | ||
218 | #ifdef CONFIG_DEBUG_FS | |
219 | static int fuel_gauge_debug_show(struct seq_file *s, void *data) | |
220 | { | |
221 | struct axp288_fg_info *info = s->private; | |
222 | int raw_val, ret; | |
223 | ||
224 | seq_printf(s, " PWR_STATUS[%02x] : %02x\n", | |
225 | AXP20X_PWR_INPUT_STATUS, | |
226 | fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS)); | |
227 | seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n", | |
228 | AXP20X_PWR_OP_MODE, | |
229 | fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE)); | |
230 | seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n", | |
231 | AXP20X_CHRG_CTRL1, | |
232 | fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1)); | |
233 | seq_printf(s, " VLTF[%02x] : %02x\n", | |
234 | AXP20X_V_LTF_DISCHRG, | |
235 | fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG)); | |
236 | seq_printf(s, " VHTF[%02x] : %02x\n", | |
237 | AXP20X_V_HTF_DISCHRG, | |
238 | fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG)); | |
239 | seq_printf(s, " CC_CTRL[%02x] : %02x\n", | |
240 | AXP20X_CC_CTRL, | |
241 | fuel_gauge_reg_readb(info, AXP20X_CC_CTRL)); | |
242 | seq_printf(s, "BATTERY CAP[%02x] : %02x\n", | |
243 | AXP20X_FG_RES, | |
244 | fuel_gauge_reg_readb(info, AXP20X_FG_RES)); | |
245 | seq_printf(s, " FG_RDC1[%02x] : %02x\n", | |
246 | AXP288_FG_RDC1_REG, | |
247 | fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG)); | |
248 | seq_printf(s, " FG_RDC0[%02x] : %02x\n", | |
249 | AXP288_FG_RDC0_REG, | |
250 | fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG)); | |
251 | seq_printf(s, " FG_OCVH[%02x] : %02x\n", | |
252 | AXP288_FG_OCVH_REG, | |
253 | fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG)); | |
254 | seq_printf(s, " FG_OCVL[%02x] : %02x\n", | |
255 | AXP288_FG_OCVL_REG, | |
256 | fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG)); | |
257 | seq_printf(s, "FG_DES_CAP1[%02x] : %02x\n", | |
258 | AXP288_FG_DES_CAP1_REG, | |
259 | fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG)); | |
260 | seq_printf(s, "FG_DES_CAP0[%02x] : %02x\n", | |
261 | AXP288_FG_DES_CAP0_REG, | |
262 | fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG)); | |
263 | seq_printf(s, " FG_CC_MTR1[%02x] : %02x\n", | |
264 | AXP288_FG_CC_MTR1_REG, | |
265 | fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG)); | |
266 | seq_printf(s, " FG_CC_MTR0[%02x] : %02x\n", | |
267 | AXP288_FG_CC_MTR0_REG, | |
268 | fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG)); | |
269 | seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n", | |
270 | AXP288_FG_OCV_CAP_REG, | |
271 | fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG)); | |
272 | seq_printf(s, " FG_CC_CAP[%02x] : %02x\n", | |
273 | AXP288_FG_CC_CAP_REG, | |
274 | fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG)); | |
275 | seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n", | |
276 | AXP288_FG_LOW_CAP_REG, | |
277 | fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG)); | |
278 | seq_printf(s, "TUNING_CTL0[%02x] : %02x\n", | |
279 | AXP288_FG_TUNE0, | |
280 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE0)); | |
281 | seq_printf(s, "TUNING_CTL1[%02x] : %02x\n", | |
282 | AXP288_FG_TUNE1, | |
283 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE1)); | |
284 | seq_printf(s, "TUNING_CTL2[%02x] : %02x\n", | |
285 | AXP288_FG_TUNE2, | |
286 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE2)); | |
287 | seq_printf(s, "TUNING_CTL3[%02x] : %02x\n", | |
288 | AXP288_FG_TUNE3, | |
289 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE3)); | |
290 | seq_printf(s, "TUNING_CTL4[%02x] : %02x\n", | |
291 | AXP288_FG_TUNE4, | |
292 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE4)); | |
293 | seq_printf(s, "TUNING_CTL5[%02x] : %02x\n", | |
294 | AXP288_FG_TUNE5, | |
295 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE5)); | |
296 | ||
297 | ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); | |
298 | if (ret >= 0) | |
299 | seq_printf(s, "axp288-batttemp : %d\n", raw_val); | |
300 | ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info); | |
301 | if (ret >= 0) | |
302 | seq_printf(s, "axp288-pmictemp : %d\n", raw_val); | |
303 | ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info); | |
304 | if (ret >= 0) | |
305 | seq_printf(s, "axp288-systtemp : %d\n", raw_val); | |
306 | ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info); | |
307 | if (ret >= 0) | |
308 | seq_printf(s, "axp288-chrgcurr : %d\n", raw_val); | |
309 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info); | |
310 | if (ret >= 0) | |
311 | seq_printf(s, "axp288-dchrgcur : %d\n", raw_val); | |
312 | ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); | |
313 | if (ret >= 0) | |
314 | seq_printf(s, "axp288-battvolt : %d\n", raw_val); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | static int debug_open(struct inode *inode, struct file *file) | |
320 | { | |
321 | return single_open(file, fuel_gauge_debug_show, inode->i_private); | |
322 | } | |
323 | ||
324 | static const struct file_operations fg_debug_fops = { | |
325 | .open = debug_open, | |
326 | .read = seq_read, | |
327 | .llseek = seq_lseek, | |
328 | .release = single_release, | |
329 | }; | |
330 | ||
331 | static void fuel_gauge_create_debugfs(struct axp288_fg_info *info) | |
332 | { | |
333 | info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL, | |
334 | info, &fg_debug_fops); | |
335 | } | |
336 | ||
337 | static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) | |
338 | { | |
339 | debugfs_remove(info->debug_file); | |
340 | } | |
341 | #else | |
342 | static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info) | |
343 | { | |
344 | } | |
345 | static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) | |
346 | { | |
347 | } | |
348 | #endif | |
349 | ||
350 | static void fuel_gauge_get_status(struct axp288_fg_info *info) | |
351 | { | |
352 | int pwr_stat, ret; | |
353 | int charge, discharge; | |
354 | ||
355 | pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); | |
356 | if (pwr_stat < 0) { | |
357 | dev_err(&info->pdev->dev, | |
358 | "PWR STAT read failed:%d\n", pwr_stat); | |
359 | return; | |
360 | } | |
361 | ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); | |
362 | if (ret < 0) { | |
363 | dev_err(&info->pdev->dev, | |
364 | "ADC charge current read failed:%d\n", ret); | |
365 | return; | |
366 | } | |
367 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); | |
368 | if (ret < 0) { | |
369 | dev_err(&info->pdev->dev, | |
370 | "ADC discharge current read failed:%d\n", ret); | |
371 | return; | |
372 | } | |
373 | ||
374 | if (charge > 0) | |
375 | info->status = POWER_SUPPLY_STATUS_CHARGING; | |
376 | else if (discharge > 0) | |
377 | info->status = POWER_SUPPLY_STATUS_DISCHARGING; | |
378 | else { | |
379 | if (pwr_stat & CHRG_STAT_BAT_PRESENT) | |
380 | info->status = POWER_SUPPLY_STATUS_FULL; | |
381 | else | |
382 | info->status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
383 | } | |
384 | } | |
385 | ||
386 | static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt) | |
387 | { | |
388 | int ret = 0, raw_val; | |
389 | ||
390 | ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); | |
391 | if (ret < 0) | |
392 | goto vbatt_read_fail; | |
393 | ||
394 | *vbatt = VOLTAGE_FROM_ADC(raw_val); | |
395 | vbatt_read_fail: | |
396 | return ret; | |
397 | } | |
398 | ||
399 | static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur) | |
400 | { | |
401 | int ret, value = 0; | |
402 | int charge, discharge; | |
403 | ||
404 | ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); | |
405 | if (ret < 0) | |
406 | goto current_read_fail; | |
407 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); | |
408 | if (ret < 0) | |
409 | goto current_read_fail; | |
410 | ||
411 | if (charge > 0) | |
412 | value = charge; | |
413 | else if (discharge > 0) | |
414 | value = -1 * discharge; | |
415 | ||
416 | *cur = value; | |
417 | current_read_fail: | |
418 | return ret; | |
419 | } | |
420 | ||
421 | static int temp_to_adc(struct axp288_fg_info *info, int tval) | |
422 | { | |
423 | int rntc = 0, i, ret, adc_val; | |
424 | int rmin, rmax, tmin, tmax; | |
425 | int tcsz = info->pdata->tcsz; | |
426 | ||
427 | /* get the Rntc resitance value for this temp */ | |
428 | if (tval > info->pdata->thermistor_curve[0][1]) { | |
429 | rntc = info->pdata->thermistor_curve[0][0]; | |
430 | } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) { | |
431 | rntc = info->pdata->thermistor_curve[tcsz-1][0]; | |
432 | } else { | |
433 | for (i = 1; i < tcsz; i++) { | |
434 | if (tval > info->pdata->thermistor_curve[i][1]) { | |
435 | rmin = info->pdata->thermistor_curve[i-1][0]; | |
436 | rmax = info->pdata->thermistor_curve[i][0]; | |
437 | tmin = info->pdata->thermistor_curve[i-1][1]; | |
438 | tmax = info->pdata->thermistor_curve[i][1]; | |
439 | rntc = rmin + ((rmax - rmin) * | |
440 | (tval - tmin) / (tmax - tmin)); | |
441 | break; | |
442 | } | |
443 | } | |
444 | } | |
445 | ||
446 | /* we need the current to calculate the proper adc voltage */ | |
447 | ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); | |
448 | if (ret < 0) { | |
449 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
450 | ret = 0x30; | |
451 | } | |
452 | ||
453 | /* | |
454 | * temperature is proportional to NTS thermistor resistance | |
455 | * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA | |
456 | * [12-bit ADC VAL] = R_NTC(Ω) * current / 800 | |
457 | */ | |
458 | adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800; | |
459 | ||
460 | return adc_val; | |
461 | } | |
462 | ||
463 | static int adc_to_temp(struct axp288_fg_info *info, int adc_val) | |
464 | { | |
465 | int ret, r, i, tval = 0; | |
466 | int rmin, rmax, tmin, tmax; | |
467 | int tcsz = info->pdata->tcsz; | |
468 | ||
469 | ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); | |
470 | if (ret < 0) { | |
471 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
472 | ret = 0x30; | |
473 | } | |
474 | ||
475 | /* | |
476 | * temperature is proportional to NTS thermistor resistance | |
477 | * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA | |
478 | * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current | |
479 | */ | |
480 | r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3))); | |
481 | ||
482 | if (r < info->pdata->thermistor_curve[0][0]) { | |
483 | tval = info->pdata->thermistor_curve[0][1]; | |
484 | } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) { | |
485 | tval = info->pdata->thermistor_curve[tcsz-1][1]; | |
486 | } else { | |
487 | for (i = 1; i < tcsz; i++) { | |
488 | if (r < info->pdata->thermistor_curve[i][0]) { | |
489 | rmin = info->pdata->thermistor_curve[i-1][0]; | |
490 | rmax = info->pdata->thermistor_curve[i][0]; | |
491 | tmin = info->pdata->thermistor_curve[i-1][1]; | |
492 | tmax = info->pdata->thermistor_curve[i][1]; | |
493 | tval = tmin + ((tmax - tmin) * | |
494 | (r - rmin) / (rmax - rmin)); | |
495 | break; | |
496 | } | |
497 | } | |
498 | } | |
499 | ||
500 | return tval; | |
501 | } | |
502 | ||
503 | static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp) | |
504 | { | |
505 | int ret, raw_val = 0; | |
506 | ||
507 | ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); | |
508 | if (ret < 0) | |
509 | goto temp_read_fail; | |
510 | ||
511 | *btemp = adc_to_temp(info, raw_val); | |
512 | ||
513 | temp_read_fail: | |
514 | return ret; | |
515 | } | |
516 | ||
517 | static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv) | |
518 | { | |
519 | int ret, value; | |
520 | ||
521 | /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */ | |
522 | ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG); | |
523 | if (ret < 0) | |
524 | goto vocv_read_fail; | |
525 | value = ret << 4; | |
526 | ||
527 | ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG); | |
528 | if (ret < 0) | |
529 | goto vocv_read_fail; | |
530 | value |= (ret & 0xf); | |
531 | ||
532 | *vocv = VOLTAGE_FROM_ADC(value); | |
533 | vocv_read_fail: | |
534 | return ret; | |
535 | } | |
536 | ||
537 | static int fuel_gauge_battery_health(struct axp288_fg_info *info) | |
538 | { | |
539 | int temp, vocv; | |
540 | int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN; | |
541 | ||
542 | ret = fuel_gauge_get_btemp(info, &temp); | |
543 | if (ret < 0) | |
544 | goto health_read_fail; | |
545 | ||
546 | ret = fuel_gauge_get_vocv(info, &vocv); | |
547 | if (ret < 0) | |
548 | goto health_read_fail; | |
549 | ||
550 | if (vocv > info->pdata->max_volt) | |
551 | health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
552 | else if (temp > info->pdata->max_temp) | |
553 | health = POWER_SUPPLY_HEALTH_OVERHEAT; | |
554 | else if (temp < info->pdata->min_temp) | |
555 | health = POWER_SUPPLY_HEALTH_COLD; | |
556 | else if (vocv < info->pdata->min_volt) | |
557 | health = POWER_SUPPLY_HEALTH_DEAD; | |
558 | else | |
559 | health = POWER_SUPPLY_HEALTH_GOOD; | |
560 | ||
561 | health_read_fail: | |
562 | return health; | |
563 | } | |
564 | ||
565 | static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info) | |
566 | { | |
567 | int ret, adc_val; | |
568 | ||
569 | /* program temperature threshold as 1/16 ADC value */ | |
570 | adc_val = temp_to_adc(info, info->pdata->max_temp); | |
571 | ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4); | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
576 | static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info) | |
577 | { | |
578 | int ret, adc_val; | |
579 | ||
580 | /* program temperature threshold as 1/16 ADC value */ | |
581 | adc_val = temp_to_adc(info, info->pdata->min_temp); | |
582 | ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4); | |
583 | ||
584 | return ret; | |
585 | } | |
586 | ||
587 | static int fuel_gauge_get_property(struct power_supply *ps, | |
588 | enum power_supply_property prop, | |
589 | union power_supply_propval *val) | |
590 | { | |
297d716f | 591 | struct axp288_fg_info *info = power_supply_get_drvdata(ps); |
5a5bf490 TB |
592 | int ret = 0, value; |
593 | ||
594 | mutex_lock(&info->lock); | |
595 | switch (prop) { | |
596 | case POWER_SUPPLY_PROP_STATUS: | |
597 | fuel_gauge_get_status(info); | |
598 | val->intval = info->status; | |
599 | break; | |
600 | case POWER_SUPPLY_PROP_HEALTH: | |
601 | val->intval = fuel_gauge_battery_health(info); | |
602 | break; | |
603 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
604 | ret = fuel_gauge_get_vbatt(info, &value); | |
605 | if (ret < 0) | |
606 | goto fuel_gauge_read_err; | |
607 | val->intval = PROP_VOLT(value); | |
608 | break; | |
609 | case POWER_SUPPLY_PROP_VOLTAGE_OCV: | |
610 | ret = fuel_gauge_get_vocv(info, &value); | |
611 | if (ret < 0) | |
612 | goto fuel_gauge_read_err; | |
613 | val->intval = PROP_VOLT(value); | |
614 | break; | |
615 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
616 | ret = fuel_gauge_get_current(info, &value); | |
617 | if (ret < 0) | |
618 | goto fuel_gauge_read_err; | |
619 | val->intval = PROP_CURR(value); | |
620 | break; | |
621 | case POWER_SUPPLY_PROP_PRESENT: | |
622 | ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); | |
623 | if (ret < 0) | |
624 | goto fuel_gauge_read_err; | |
625 | ||
626 | if (ret & CHRG_STAT_BAT_PRESENT) | |
627 | val->intval = 1; | |
628 | else | |
629 | val->intval = 0; | |
630 | break; | |
631 | case POWER_SUPPLY_PROP_CAPACITY: | |
632 | ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); | |
633 | if (ret < 0) | |
634 | goto fuel_gauge_read_err; | |
635 | ||
636 | if (!(ret & FG_REP_CAP_VALID)) | |
637 | dev_err(&info->pdev->dev, | |
638 | "capacity measurement not valid\n"); | |
639 | val->intval = (ret & FG_REP_CAP_VAL_MASK); | |
640 | break; | |
641 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
642 | ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); | |
643 | if (ret < 0) | |
644 | goto fuel_gauge_read_err; | |
645 | val->intval = (ret & 0x0f); | |
646 | break; | |
647 | case POWER_SUPPLY_PROP_TEMP: | |
648 | ret = fuel_gauge_get_btemp(info, &value); | |
649 | if (ret < 0) | |
650 | goto fuel_gauge_read_err; | |
651 | val->intval = PROP_TEMP(value); | |
652 | break; | |
653 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
654 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
655 | val->intval = PROP_TEMP(info->pdata->max_temp); | |
656 | break; | |
657 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
658 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
659 | val->intval = PROP_TEMP(info->pdata->min_temp); | |
660 | break; | |
661 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
662 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
663 | break; | |
664 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
665 | ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG); | |
666 | if (ret < 0) | |
667 | goto fuel_gauge_read_err; | |
668 | ||
669 | value = (ret & FG_CC_MTR1_VAL_MASK) << 8; | |
670 | ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG); | |
671 | if (ret < 0) | |
672 | goto fuel_gauge_read_err; | |
673 | value |= (ret & FG_CC_MTR0_VAL_MASK); | |
674 | val->intval = value * FG_DES_CAP_RES_LSB; | |
675 | break; | |
676 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
677 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); | |
678 | if (ret < 0) | |
679 | goto fuel_gauge_read_err; | |
680 | ||
681 | value = (ret & FG_DES_CAP1_VAL_MASK) << 8; | |
682 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG); | |
683 | if (ret < 0) | |
684 | goto fuel_gauge_read_err; | |
685 | value |= (ret & FG_DES_CAP0_VAL_MASK); | |
686 | val->intval = value * FG_DES_CAP_RES_LSB; | |
687 | break; | |
688 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
689 | val->intval = PROP_CURR(info->pdata->design_cap); | |
690 | break; | |
691 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
692 | val->intval = PROP_VOLT(info->pdata->max_volt); | |
693 | break; | |
694 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
695 | val->intval = PROP_VOLT(info->pdata->min_volt); | |
696 | break; | |
697 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
698 | val->strval = info->pdata->battid; | |
699 | break; | |
700 | default: | |
701 | mutex_unlock(&info->lock); | |
702 | return -EINVAL; | |
703 | } | |
704 | ||
705 | mutex_unlock(&info->lock); | |
706 | return 0; | |
707 | ||
708 | fuel_gauge_read_err: | |
709 | mutex_unlock(&info->lock); | |
710 | return ret; | |
711 | } | |
712 | ||
713 | static int fuel_gauge_set_property(struct power_supply *ps, | |
714 | enum power_supply_property prop, | |
715 | const union power_supply_propval *val) | |
716 | { | |
297d716f | 717 | struct axp288_fg_info *info = power_supply_get_drvdata(ps); |
5a5bf490 TB |
718 | int ret = 0; |
719 | ||
720 | mutex_lock(&info->lock); | |
721 | switch (prop) { | |
722 | case POWER_SUPPLY_PROP_STATUS: | |
723 | info->status = val->intval; | |
724 | break; | |
725 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
726 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
727 | if ((val->intval < PD_DEF_MIN_TEMP) || | |
728 | (val->intval > PD_DEF_MAX_TEMP)) { | |
729 | ret = -EINVAL; | |
730 | break; | |
731 | } | |
732 | info->pdata->min_temp = UNPROP_TEMP(val->intval); | |
733 | ret = fuel_gauge_set_low_btemp_alert(info); | |
734 | if (ret < 0) | |
735 | dev_err(&info->pdev->dev, | |
736 | "temp alert min set fail:%d\n", ret); | |
737 | break; | |
738 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
739 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
740 | if ((val->intval < PD_DEF_MIN_TEMP) || | |
741 | (val->intval > PD_DEF_MAX_TEMP)) { | |
742 | ret = -EINVAL; | |
743 | break; | |
744 | } | |
745 | info->pdata->max_temp = UNPROP_TEMP(val->intval); | |
746 | ret = fuel_gauge_set_high_btemp_alert(info); | |
747 | if (ret < 0) | |
748 | dev_err(&info->pdev->dev, | |
749 | "temp alert max set fail:%d\n", ret); | |
750 | break; | |
751 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
752 | if ((val->intval < 0) || (val->intval > 15)) { | |
753 | ret = -EINVAL; | |
754 | break; | |
755 | } | |
756 | ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); | |
757 | if (ret < 0) | |
758 | break; | |
759 | ret &= 0xf0; | |
760 | ret |= (val->intval & 0xf); | |
761 | ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret); | |
762 | break; | |
763 | default: | |
764 | ret = -EINVAL; | |
765 | break; | |
766 | } | |
767 | ||
768 | mutex_unlock(&info->lock); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static int fuel_gauge_property_is_writeable(struct power_supply *psy, | |
773 | enum power_supply_property psp) | |
774 | { | |
775 | int ret; | |
776 | ||
777 | switch (psp) { | |
778 | case POWER_SUPPLY_PROP_STATUS: | |
779 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
780 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
781 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
782 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
783 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
784 | ret = 1; | |
785 | break; | |
786 | default: | |
787 | ret = 0; | |
788 | } | |
789 | ||
790 | return ret; | |
791 | } | |
792 | ||
793 | static void fuel_gauge_status_monitor(struct work_struct *work) | |
794 | { | |
795 | struct axp288_fg_info *info = container_of(work, | |
796 | struct axp288_fg_info, status_monitor.work); | |
797 | ||
798 | fuel_gauge_get_status(info); | |
297d716f | 799 | power_supply_changed(info->bat); |
5a5bf490 TB |
800 | schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); |
801 | } | |
802 | ||
803 | static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev) | |
804 | { | |
805 | struct axp288_fg_info *info = dev; | |
806 | int i; | |
807 | ||
808 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { | |
809 | if (info->irq[i] == irq) | |
810 | break; | |
811 | } | |
812 | ||
813 | if (i >= AXP288_FG_INTR_NUM) { | |
814 | dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); | |
815 | return IRQ_NONE; | |
816 | } | |
817 | ||
818 | switch (i) { | |
819 | case QWBTU_IRQ: | |
820 | dev_info(&info->pdev->dev, | |
821 | "Quit Battery under temperature in work mode IRQ (QWBTU)\n"); | |
822 | break; | |
823 | case WBTU_IRQ: | |
824 | dev_info(&info->pdev->dev, | |
825 | "Battery under temperature in work mode IRQ (WBTU)\n"); | |
826 | break; | |
827 | case QWBTO_IRQ: | |
828 | dev_info(&info->pdev->dev, | |
829 | "Quit Battery over temperature in work mode IRQ (QWBTO)\n"); | |
830 | break; | |
831 | case WBTO_IRQ: | |
832 | dev_info(&info->pdev->dev, | |
833 | "Battery over temperature in work mode IRQ (WBTO)\n"); | |
834 | break; | |
835 | case WL2_IRQ: | |
836 | dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n"); | |
837 | break; | |
838 | case WL1_IRQ: | |
839 | dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n"); | |
840 | break; | |
841 | default: | |
842 | dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); | |
843 | } | |
844 | ||
297d716f | 845 | power_supply_changed(info->bat); |
5a5bf490 TB |
846 | return IRQ_HANDLED; |
847 | } | |
848 | ||
849 | static void fuel_gauge_external_power_changed(struct power_supply *psy) | |
850 | { | |
297d716f | 851 | struct axp288_fg_info *info = power_supply_get_drvdata(psy); |
5a5bf490 | 852 | |
297d716f | 853 | power_supply_changed(info->bat); |
5a5bf490 TB |
854 | } |
855 | ||
297d716f KK |
856 | static const struct power_supply_desc fuel_gauge_desc = { |
857 | .name = DEV_NAME, | |
858 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
859 | .properties = fuel_gauge_props, | |
860 | .num_properties = ARRAY_SIZE(fuel_gauge_props), | |
861 | .get_property = fuel_gauge_get_property, | |
862 | .set_property = fuel_gauge_set_property, | |
863 | .property_is_writeable = fuel_gauge_property_is_writeable, | |
864 | .external_power_changed = fuel_gauge_external_power_changed, | |
865 | }; | |
866 | ||
5a5bf490 TB |
867 | static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info) |
868 | { | |
869 | int ret; | |
870 | u8 reg_val; | |
871 | ||
872 | ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); | |
873 | if (ret < 0) { | |
874 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
875 | return ret; | |
876 | } | |
877 | ret = (ret & FG_REP_CAP_VAL_MASK); | |
878 | ||
879 | if (ret > FG_LOW_CAP_WARN_THR) | |
880 | reg_val = FG_LOW_CAP_WARN_THR; | |
881 | else if (ret > FG_LOW_CAP_CRIT_THR) | |
882 | reg_val = FG_LOW_CAP_CRIT_THR; | |
883 | else | |
884 | reg_val = FG_LOW_CAP_SHDN_THR; | |
885 | ||
886 | reg_val |= FG_LOW_CAP_THR1_VAL; | |
887 | ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val); | |
888 | if (ret < 0) | |
889 | dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret); | |
890 | ||
891 | return ret; | |
892 | } | |
893 | ||
894 | static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info) | |
895 | { | |
896 | int ret; | |
897 | u8 val; | |
898 | ||
899 | ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); | |
900 | if (ret < 0) | |
901 | goto fg_prog_ocv_fail; | |
902 | else | |
903 | val = (ret & ~CHRG_CCCV_CV_MASK); | |
904 | ||
905 | switch (info->pdata->max_volt) { | |
906 | case CV_4100: | |
907 | val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS); | |
908 | break; | |
909 | case CV_4150: | |
910 | val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS); | |
911 | break; | |
912 | case CV_4200: | |
913 | val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); | |
914 | break; | |
915 | case CV_4350: | |
916 | val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS); | |
917 | break; | |
918 | default: | |
919 | val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); | |
920 | break; | |
921 | } | |
922 | ||
923 | ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val); | |
924 | fg_prog_ocv_fail: | |
925 | return ret; | |
926 | } | |
927 | ||
928 | static int fuel_gauge_program_design_cap(struct axp288_fg_info *info) | |
929 | { | |
930 | int ret; | |
931 | ||
932 | ret = fuel_gauge_reg_writeb(info, | |
933 | AXP288_FG_DES_CAP1_REG, info->pdata->cap1); | |
934 | if (ret < 0) | |
935 | goto fg_prog_descap_fail; | |
936 | ||
937 | ret = fuel_gauge_reg_writeb(info, | |
938 | AXP288_FG_DES_CAP0_REG, info->pdata->cap0); | |
939 | ||
940 | fg_prog_descap_fail: | |
941 | return ret; | |
942 | } | |
943 | ||
944 | static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info) | |
945 | { | |
946 | int ret = 0, i; | |
947 | ||
948 | for (i = 0; i < OCV_CURVE_SIZE; i++) { | |
949 | ret = fuel_gauge_reg_writeb(info, | |
950 | AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]); | |
951 | if (ret < 0) | |
952 | goto fg_prog_ocv_fail; | |
953 | } | |
954 | ||
955 | fg_prog_ocv_fail: | |
956 | return ret; | |
957 | } | |
958 | ||
959 | static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info) | |
960 | { | |
961 | int ret; | |
962 | ||
963 | ret = fuel_gauge_reg_writeb(info, | |
964 | AXP288_FG_RDC1_REG, info->pdata->rdc1); | |
965 | if (ret < 0) | |
966 | goto fg_prog_ocv_fail; | |
967 | ||
968 | ret = fuel_gauge_reg_writeb(info, | |
969 | AXP288_FG_RDC0_REG, info->pdata->rdc0); | |
970 | ||
971 | fg_prog_ocv_fail: | |
972 | return ret; | |
973 | } | |
974 | ||
975 | static void fuel_gauge_init_config_regs(struct axp288_fg_info *info) | |
976 | { | |
977 | int ret; | |
978 | ||
979 | /* | |
980 | * check if the config data is already | |
981 | * programmed and if so just return. | |
982 | */ | |
983 | ||
984 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); | |
985 | if (ret < 0) { | |
986 | dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n"); | |
987 | } else if (!(ret & FG_DES_CAP1_VALID)) { | |
988 | dev_info(&info->pdev->dev, "FG data needs to be initialized\n"); | |
989 | } else { | |
990 | dev_info(&info->pdev->dev, "FG data is already initialized\n"); | |
991 | return; | |
992 | } | |
993 | ||
994 | ret = fuel_gauge_program_vbatt_full(info); | |
995 | if (ret < 0) | |
996 | dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret); | |
997 | ||
998 | ret = fuel_gauge_program_design_cap(info); | |
999 | if (ret < 0) | |
1000 | dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret); | |
1001 | ||
1002 | ret = fuel_gauge_program_rdc_vals(info); | |
1003 | if (ret < 0) | |
1004 | dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret); | |
1005 | ||
1006 | ret = fuel_gauge_program_ocv_curve(info); | |
1007 | if (ret < 0) | |
1008 | dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret); | |
1009 | ||
1010 | ret = fuel_gauge_set_lowbatt_thresholds(info); | |
1011 | if (ret < 0) | |
1012 | dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret); | |
1013 | ||
1014 | ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef); | |
1015 | if (ret < 0) | |
1016 | dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret); | |
1017 | } | |
1018 | ||
1019 | static void fuel_gauge_init_irq(struct axp288_fg_info *info) | |
1020 | { | |
1021 | int ret, i, pirq; | |
1022 | ||
1023 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { | |
1024 | pirq = platform_get_irq(info->pdev, i); | |
1025 | info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); | |
1026 | if (info->irq[i] < 0) { | |
1027 | dev_warn(&info->pdev->dev, | |
1028 | "regmap_irq get virq failed for IRQ %d: %d\n", | |
1029 | pirq, info->irq[i]); | |
1030 | info->irq[i] = -1; | |
1031 | goto intr_failed; | |
1032 | } | |
1033 | ret = request_threaded_irq(info->irq[i], | |
1034 | NULL, fuel_gauge_thread_handler, | |
1035 | IRQF_ONESHOT, DEV_NAME, info); | |
1036 | if (ret) { | |
1037 | dev_warn(&info->pdev->dev, | |
1038 | "request irq failed for IRQ %d: %d\n", | |
1039 | pirq, info->irq[i]); | |
1040 | info->irq[i] = -1; | |
1041 | goto intr_failed; | |
1042 | } else { | |
1043 | dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n", | |
1044 | pirq, info->irq[i]); | |
1045 | } | |
1046 | } | |
1047 | return; | |
1048 | ||
1049 | intr_failed: | |
1050 | for (; i > 0; i--) { | |
1051 | free_irq(info->irq[i - 1], info); | |
1052 | info->irq[i - 1] = -1; | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info) | |
1057 | { | |
1058 | int ret; | |
1059 | unsigned int val; | |
1060 | ||
1061 | ret = fuel_gauge_set_high_btemp_alert(info); | |
1062 | if (ret < 0) | |
1063 | dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret); | |
1064 | ||
1065 | ret = fuel_gauge_set_low_btemp_alert(info); | |
1066 | if (ret < 0) | |
1067 | dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret); | |
1068 | ||
1069 | /* enable interrupts */ | |
1070 | val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN); | |
1071 | val |= TEMP_IRQ_CFG_MASK; | |
1072 | fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val); | |
1073 | ||
1074 | val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN); | |
1075 | val |= FG_IRQ_CFG_LOWBATT_MASK; | |
1076 | val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val); | |
1077 | } | |
1078 | ||
1079 | static int axp288_fuel_gauge_probe(struct platform_device *pdev) | |
1080 | { | |
297d716f | 1081 | int ret = 0; |
5a5bf490 TB |
1082 | struct axp288_fg_info *info; |
1083 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
297d716f | 1084 | struct power_supply_config psy_cfg = {}; |
5a5bf490 TB |
1085 | |
1086 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
1087 | if (!info) | |
1088 | return -ENOMEM; | |
1089 | ||
1090 | info->pdev = pdev; | |
1091 | info->regmap = axp20x->regmap; | |
1092 | info->regmap_irqc = axp20x->regmap_irqc; | |
1093 | info->status = POWER_SUPPLY_STATUS_UNKNOWN; | |
1094 | info->pdata = pdev->dev.platform_data; | |
1095 | if (!info->pdata) | |
1096 | return -ENODEV; | |
1097 | ||
1098 | platform_set_drvdata(pdev, info); | |
1099 | ||
1100 | mutex_init(&info->lock); | |
1101 | INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor); | |
1102 | ||
297d716f KK |
1103 | psy_cfg.drv_data = info; |
1104 | info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg); | |
1105 | if (IS_ERR(info->bat)) { | |
1106 | ret = PTR_ERR(info->bat); | |
5a5bf490 TB |
1107 | dev_err(&pdev->dev, "failed to register battery: %d\n", ret); |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | fuel_gauge_create_debugfs(info); | |
1112 | fuel_gauge_init_config_regs(info); | |
1113 | fuel_gauge_init_irq(info); | |
1114 | fuel_gauge_init_hw_regs(info); | |
1115 | schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); | |
1116 | ||
1117 | return ret; | |
1118 | } | |
1119 | ||
f1f27a4a | 1120 | static const struct platform_device_id axp288_fg_id_table[] = { |
5a5bf490 TB |
1121 | { .name = DEV_NAME }, |
1122 | {}, | |
1123 | }; | |
1124 | ||
1125 | static int axp288_fuel_gauge_remove(struct platform_device *pdev) | |
1126 | { | |
1127 | struct axp288_fg_info *info = platform_get_drvdata(pdev); | |
1128 | int i; | |
1129 | ||
1130 | cancel_delayed_work_sync(&info->status_monitor); | |
297d716f | 1131 | power_supply_unregister(info->bat); |
5a5bf490 TB |
1132 | fuel_gauge_remove_debugfs(info); |
1133 | ||
1134 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) | |
1135 | if (info->irq[i] >= 0) | |
1136 | free_irq(info->irq[i], info); | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static struct platform_driver axp288_fuel_gauge_driver = { | |
1142 | .probe = axp288_fuel_gauge_probe, | |
1143 | .remove = axp288_fuel_gauge_remove, | |
1144 | .id_table = axp288_fg_id_table, | |
1145 | .driver = { | |
1146 | .name = DEV_NAME, | |
1147 | }, | |
1148 | }; | |
1149 | ||
1150 | module_platform_driver(axp288_fuel_gauge_driver); | |
1151 | ||
409e718e | 1152 | MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); |
5a5bf490 TB |
1153 | MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>"); |
1154 | MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver"); | |
1155 | MODULE_LICENSE("GPL"); |