15a729246SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2874b2adbSTony Lindgren /*
3874b2adbSTony Lindgren * Battery driver for CPCAP PMIC
4874b2adbSTony Lindgren *
5874b2adbSTony Lindgren * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
6874b2adbSTony Lindgren *
728444849SPavel Machek * Some parts of the code based on earlier Motorola mapphone Linux kernel
8874b2adbSTony Lindgren * drivers:
9874b2adbSTony Lindgren *
10874b2adbSTony Lindgren * Copyright (C) 2009-2010 Motorola, Inc.
11874b2adbSTony Lindgren */
12874b2adbSTony Lindgren
13874b2adbSTony Lindgren #include <linux/delay.h>
14874b2adbSTony Lindgren #include <linux/err.h>
15874b2adbSTony Lindgren #include <linux/interrupt.h>
16874b2adbSTony Lindgren #include <linux/kernel.h>
17874b2adbSTony Lindgren #include <linux/module.h>
18*2ce8284cSRob Herring #include <linux/of.h>
19874b2adbSTony Lindgren #include <linux/platform_device.h>
20874b2adbSTony Lindgren #include <linux/power_supply.h>
21874b2adbSTony Lindgren #include <linux/reboot.h>
22874b2adbSTony Lindgren #include <linux/regmap.h>
23fd46821eSCarl Philipp Klemm #include <linux/nvmem-consumer.h>
2434fb2a95SCarl Philipp Klemm #include <linux/moduleparam.h>
25874b2adbSTony Lindgren
26874b2adbSTony Lindgren #include <linux/iio/consumer.h>
27874b2adbSTony Lindgren #include <linux/iio/types.h>
28874b2adbSTony Lindgren #include <linux/mfd/motorola-cpcap.h>
29874b2adbSTony Lindgren
30874b2adbSTony Lindgren /*
31874b2adbSTony Lindgren * Register bit defines for CPCAP_REG_BPEOL. Some of these seem to
32874b2adbSTony Lindgren * map to MC13783UG.pdf "Table 5-19. Register 13, Power Control 0"
33874b2adbSTony Lindgren * to enable BATTDETEN, LOBAT and EOL features. We currently use
34874b2adbSTony Lindgren * LOBAT interrupts instead of EOL.
35874b2adbSTony Lindgren */
36874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_EOL9 BIT(9) /* Set for EOL irq */
37874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_EOL8 BIT(8) /* Set for EOL irq */
38874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_UNKNOWN7 BIT(7)
39874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_UNKNOWN6 BIT(6)
40874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_UNKNOWN5 BIT(5)
41874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_EOL_MULTI BIT(4) /* Set for multiple EOL irqs */
42874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_UNKNOWN3 BIT(3)
43874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_UNKNOWN2 BIT(2)
44874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_BATTDETEN BIT(1) /* Enable battery detect */
45874b2adbSTony Lindgren #define CPCAP_REG_BPEOL_BIT_EOLSEL BIT(0) /* BPDET = 0, EOL = 1 */
46874b2adbSTony Lindgren
470cb90f07STony Lindgren /*
480cb90f07STony Lindgren * Register bit defines for CPCAP_REG_CCC1. These seem similar to the twl6030
490cb90f07STony Lindgren * coulomb counter registers rather than the mc13892 registers. Both twl6030
500cb90f07STony Lindgren * and mc13892 set bits 2 and 1 to reset and clear registers. But mc13892
510cb90f07STony Lindgren * sets bit 0 to start the coulomb counter while twl6030 sets bit 0 to stop
520cb90f07STony Lindgren * the coulomb counter like cpcap does. So for now, we use the twl6030 style
530cb90f07STony Lindgren * naming for the registers.
540cb90f07STony Lindgren */
550cb90f07STony Lindgren #define CPCAP_REG_CCC1_ACTIVE_MODE1 BIT(4) /* Update rate */
560cb90f07STony Lindgren #define CPCAP_REG_CCC1_ACTIVE_MODE0 BIT(3) /* Update rate */
570cb90f07STony Lindgren #define CPCAP_REG_CCC1_AUTOCLEAR BIT(2) /* Resets sample registers */
580cb90f07STony Lindgren #define CPCAP_REG_CCC1_CAL_EN BIT(1) /* Clears after write in 1s */
590cb90f07STony Lindgren #define CPCAP_REG_CCC1_PAUSE BIT(0) /* Stop counters, allow write */
600cb90f07STony Lindgren #define CPCAP_REG_CCC1_RESET_MASK (CPCAP_REG_CCC1_AUTOCLEAR | \
610cb90f07STony Lindgren CPCAP_REG_CCC1_CAL_EN)
620cb90f07STony Lindgren
630cb90f07STony Lindgren #define CPCAP_REG_CCCC2_RATE1 BIT(5)
640cb90f07STony Lindgren #define CPCAP_REG_CCCC2_RATE0 BIT(4)
650cb90f07STony Lindgren #define CPCAP_REG_CCCC2_ENABLE BIT(3)
660cb90f07STony Lindgren
67874b2adbSTony Lindgren #define CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS 250
68874b2adbSTony Lindgren
69fd46821eSCarl Philipp Klemm #define CPCAP_BATTERY_EB41_HW4X_ID 0x9E
70fd46821eSCarl Philipp Klemm #define CPCAP_BATTERY_BW8X_ID 0x98
71fd46821eSCarl Philipp Klemm
72874b2adbSTony Lindgren enum {
73874b2adbSTony Lindgren CPCAP_BATTERY_IIO_BATTDET,
74874b2adbSTony Lindgren CPCAP_BATTERY_IIO_VOLTAGE,
75874b2adbSTony Lindgren CPCAP_BATTERY_IIO_CHRG_CURRENT,
76874b2adbSTony Lindgren CPCAP_BATTERY_IIO_BATT_CURRENT,
77874b2adbSTony Lindgren CPCAP_BATTERY_IIO_NR,
78874b2adbSTony Lindgren };
79874b2adbSTony Lindgren
80874b2adbSTony Lindgren enum cpcap_battery_irq_action {
81874b2adbSTony Lindgren CPCAP_BATTERY_IRQ_ACTION_NONE,
820cb90f07STony Lindgren CPCAP_BATTERY_IRQ_ACTION_CC_CAL_DONE,
83874b2adbSTony Lindgren CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW,
84874b2adbSTony Lindgren CPCAP_BATTERY_IRQ_ACTION_POWEROFF,
85874b2adbSTony Lindgren };
86874b2adbSTony Lindgren
87874b2adbSTony Lindgren struct cpcap_interrupt_desc {
88874b2adbSTony Lindgren const char *name;
89874b2adbSTony Lindgren struct list_head node;
90874b2adbSTony Lindgren int irq;
91874b2adbSTony Lindgren enum cpcap_battery_irq_action action;
92874b2adbSTony Lindgren };
93874b2adbSTony Lindgren
94874b2adbSTony Lindgren struct cpcap_battery_config {
95874b2adbSTony Lindgren int cd_factor;
96874b2adbSTony Lindgren struct power_supply_info info;
978b0134ccSTony Lindgren struct power_supply_battery_info bat;
98874b2adbSTony Lindgren };
99874b2adbSTony Lindgren
100874b2adbSTony Lindgren struct cpcap_coulomb_counter_data {
101c68b901aSTony Lindgren s32 sample; /* 24 or 32 bits */
102874b2adbSTony Lindgren s32 accumulator;
10335439b7aSTony Lindgren s16 offset; /* 9 bits */
104b28ac419STony Lindgren s16 integrator; /* 13 or 16 bits */
105874b2adbSTony Lindgren };
106874b2adbSTony Lindgren
107874b2adbSTony Lindgren enum cpcap_battery_state {
108874b2adbSTony Lindgren CPCAP_BATTERY_STATE_PREVIOUS,
109874b2adbSTony Lindgren CPCAP_BATTERY_STATE_LATEST,
110faf6e900SArthur Demchenkov CPCAP_BATTERY_STATE_EMPTY,
111faf6e900SArthur Demchenkov CPCAP_BATTERY_STATE_FULL,
112874b2adbSTony Lindgren CPCAP_BATTERY_STATE_NR,
113874b2adbSTony Lindgren };
114874b2adbSTony Lindgren
115874b2adbSTony Lindgren struct cpcap_battery_state_data {
116874b2adbSTony Lindgren int voltage;
117874b2adbSTony Lindgren int current_ua;
118874b2adbSTony Lindgren int counter_uah;
119874b2adbSTony Lindgren int temperature;
120874b2adbSTony Lindgren ktime_t time;
121874b2adbSTony Lindgren struct cpcap_coulomb_counter_data cc;
122874b2adbSTony Lindgren };
123874b2adbSTony Lindgren
124874b2adbSTony Lindgren struct cpcap_battery_ddata {
125874b2adbSTony Lindgren struct device *dev;
126874b2adbSTony Lindgren struct regmap *reg;
127874b2adbSTony Lindgren struct list_head irq_list;
128874b2adbSTony Lindgren struct iio_channel *channels[CPCAP_BATTERY_IIO_NR];
129874b2adbSTony Lindgren struct power_supply *psy;
130874b2adbSTony Lindgren struct cpcap_battery_config config;
131874b2adbSTony Lindgren struct cpcap_battery_state_data state[CPCAP_BATTERY_STATE_NR];
132458f5c8cSTony Lindgren u32 cc_lsb; /* μAms per LSB */
133874b2adbSTony Lindgren atomic_t active;
1344fb0357cSArthur Demchenkov int charge_full;
135874b2adbSTony Lindgren int status;
136874b2adbSTony Lindgren u16 vendor;
137fd46821eSCarl Philipp Klemm bool check_nvmem;
138bb8b9a98STony Lindgren unsigned int is_full:1;
139874b2adbSTony Lindgren };
140874b2adbSTony Lindgren
141874b2adbSTony Lindgren #define CPCAP_NO_BATTERY -400
142874b2adbSTony Lindgren
14334fb2a95SCarl Philipp Klemm static bool ignore_temperature_probe;
14434fb2a95SCarl Philipp Klemm module_param(ignore_temperature_probe, bool, 0660);
14534fb2a95SCarl Philipp Klemm
146874b2adbSTony Lindgren static struct cpcap_battery_state_data *
cpcap_battery_get_state(struct cpcap_battery_ddata * ddata,enum cpcap_battery_state state)147874b2adbSTony Lindgren cpcap_battery_get_state(struct cpcap_battery_ddata *ddata,
148874b2adbSTony Lindgren enum cpcap_battery_state state)
149874b2adbSTony Lindgren {
150874b2adbSTony Lindgren if (state >= CPCAP_BATTERY_STATE_NR)
151874b2adbSTony Lindgren return NULL;
152874b2adbSTony Lindgren
153874b2adbSTony Lindgren return &ddata->state[state];
154874b2adbSTony Lindgren }
155874b2adbSTony Lindgren
156874b2adbSTony Lindgren static struct cpcap_battery_state_data *
cpcap_battery_latest(struct cpcap_battery_ddata * ddata)157874b2adbSTony Lindgren cpcap_battery_latest(struct cpcap_battery_ddata *ddata)
158874b2adbSTony Lindgren {
159874b2adbSTony Lindgren return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_LATEST);
160874b2adbSTony Lindgren }
161874b2adbSTony Lindgren
162874b2adbSTony Lindgren static struct cpcap_battery_state_data *
cpcap_battery_previous(struct cpcap_battery_ddata * ddata)163874b2adbSTony Lindgren cpcap_battery_previous(struct cpcap_battery_ddata *ddata)
164874b2adbSTony Lindgren {
165874b2adbSTony Lindgren return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_PREVIOUS);
166874b2adbSTony Lindgren }
167874b2adbSTony Lindgren
168faf6e900SArthur Demchenkov static struct cpcap_battery_state_data *
cpcap_battery_get_empty(struct cpcap_battery_ddata * ddata)169faf6e900SArthur Demchenkov cpcap_battery_get_empty(struct cpcap_battery_ddata *ddata)
170faf6e900SArthur Demchenkov {
171faf6e900SArthur Demchenkov return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_EMPTY);
172faf6e900SArthur Demchenkov }
173faf6e900SArthur Demchenkov
174faf6e900SArthur Demchenkov static struct cpcap_battery_state_data *
cpcap_battery_get_full(struct cpcap_battery_ddata * ddata)175faf6e900SArthur Demchenkov cpcap_battery_get_full(struct cpcap_battery_ddata *ddata)
176faf6e900SArthur Demchenkov {
177faf6e900SArthur Demchenkov return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_FULL);
178faf6e900SArthur Demchenkov }
179faf6e900SArthur Demchenkov
cpcap_charger_battery_temperature(struct cpcap_battery_ddata * ddata,int * value)180874b2adbSTony Lindgren static int cpcap_charger_battery_temperature(struct cpcap_battery_ddata *ddata,
181874b2adbSTony Lindgren int *value)
182874b2adbSTony Lindgren {
183874b2adbSTony Lindgren struct iio_channel *channel;
184874b2adbSTony Lindgren int error;
185874b2adbSTony Lindgren
186874b2adbSTony Lindgren channel = ddata->channels[CPCAP_BATTERY_IIO_BATTDET];
187874b2adbSTony Lindgren error = iio_read_channel_processed(channel, value);
188874b2adbSTony Lindgren if (error < 0) {
18934fb2a95SCarl Philipp Klemm if (!ignore_temperature_probe)
190874b2adbSTony Lindgren dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
191874b2adbSTony Lindgren *value = CPCAP_NO_BATTERY;
192874b2adbSTony Lindgren
193874b2adbSTony Lindgren return error;
194874b2adbSTony Lindgren }
195874b2adbSTony Lindgren
196874b2adbSTony Lindgren *value /= 100;
197874b2adbSTony Lindgren
198874b2adbSTony Lindgren return 0;
199874b2adbSTony Lindgren }
200874b2adbSTony Lindgren
cpcap_battery_get_voltage(struct cpcap_battery_ddata * ddata)201874b2adbSTony Lindgren static int cpcap_battery_get_voltage(struct cpcap_battery_ddata *ddata)
202874b2adbSTony Lindgren {
203874b2adbSTony Lindgren struct iio_channel *channel;
204874b2adbSTony Lindgren int error, value = 0;
205874b2adbSTony Lindgren
206874b2adbSTony Lindgren channel = ddata->channels[CPCAP_BATTERY_IIO_VOLTAGE];
207874b2adbSTony Lindgren error = iio_read_channel_processed(channel, &value);
208874b2adbSTony Lindgren if (error < 0) {
209874b2adbSTony Lindgren dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
210874b2adbSTony Lindgren
211874b2adbSTony Lindgren return 0;
212874b2adbSTony Lindgren }
213874b2adbSTony Lindgren
214874b2adbSTony Lindgren return value * 1000;
215874b2adbSTony Lindgren }
216874b2adbSTony Lindgren
cpcap_battery_get_current(struct cpcap_battery_ddata * ddata)217874b2adbSTony Lindgren static int cpcap_battery_get_current(struct cpcap_battery_ddata *ddata)
218874b2adbSTony Lindgren {
219874b2adbSTony Lindgren struct iio_channel *channel;
220874b2adbSTony Lindgren int error, value = 0;
221874b2adbSTony Lindgren
222874b2adbSTony Lindgren channel = ddata->channels[CPCAP_BATTERY_IIO_BATT_CURRENT];
223874b2adbSTony Lindgren error = iio_read_channel_processed(channel, &value);
224874b2adbSTony Lindgren if (error < 0) {
225874b2adbSTony Lindgren dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
226874b2adbSTony Lindgren
227874b2adbSTony Lindgren return 0;
228874b2adbSTony Lindgren }
229874b2adbSTony Lindgren
230874b2adbSTony Lindgren return value * 1000;
231874b2adbSTony Lindgren }
232874b2adbSTony Lindgren
233874b2adbSTony Lindgren /**
234874b2adbSTony Lindgren * cpcap_battery_cc_raw_div - calculate and divide coulomb counter μAms values
235874b2adbSTony Lindgren * @ddata: device driver data
236874b2adbSTony Lindgren * @sample: coulomb counter sample value
237874b2adbSTony Lindgren * @accumulator: coulomb counter integrator value
238874b2adbSTony Lindgren * @offset: coulomb counter offset value
239874b2adbSTony Lindgren * @divider: conversion divider
240874b2adbSTony Lindgren *
241874b2adbSTony Lindgren * Note that cc_lsb and cc_dur values are from Motorola Linux kernel
242874b2adbSTony Lindgren * function data_get_avg_curr_ua() and seem to be based on measured test
243874b2adbSTony Lindgren * results. It also has the following comment:
244874b2adbSTony Lindgren *
245874b2adbSTony Lindgren * Adjustment factors are applied here as a temp solution per the test
246874b2adbSTony Lindgren * results. Need to work out a formal solution for this adjustment.
247874b2adbSTony Lindgren *
248874b2adbSTony Lindgren * A coulomb counter for similar hardware seems to be documented in
249874b2adbSTony Lindgren * "TWL6030 Gas Gauging Basics (Rev. A)" swca095a.pdf in chapter
250874b2adbSTony Lindgren * "10 Calculating Accumulated Current". We however follow what the
251874b2adbSTony Lindgren * Motorola mapphone Linux kernel is doing as there may be either a
252874b2adbSTony Lindgren * TI or ST coulomb counter in the PMIC.
253874b2adbSTony Lindgren */
cpcap_battery_cc_raw_div(struct cpcap_battery_ddata * ddata,s32 sample,s32 accumulator,s16 offset,u32 divider)254874b2adbSTony Lindgren static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
255c68b901aSTony Lindgren s32 sample, s32 accumulator,
256874b2adbSTony Lindgren s16 offset, u32 divider)
257874b2adbSTony Lindgren {
258874b2adbSTony Lindgren s64 acc;
259874b2adbSTony Lindgren
260dbe7208cSTony Lindgren if (!divider)
261dbe7208cSTony Lindgren return 0;
262dbe7208cSTony Lindgren
263874b2adbSTony Lindgren acc = accumulator;
264c59b3badSTony Lindgren acc -= (s64)sample * offset;
265c59b3badSTony Lindgren acc *= ddata->cc_lsb;
266c59b3badSTony Lindgren acc *= -1;
267c59b3badSTony Lindgren acc = div_s64(acc, divider);
268874b2adbSTony Lindgren
269c59b3badSTony Lindgren return acc;
270874b2adbSTony Lindgren }
271874b2adbSTony Lindgren
272874b2adbSTony Lindgren /* 3600000μAms = 1μAh */
cpcap_battery_cc_to_uah(struct cpcap_battery_ddata * ddata,s32 sample,s32 accumulator,s16 offset)273874b2adbSTony Lindgren static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata,
274c68b901aSTony Lindgren s32 sample, s32 accumulator,
275874b2adbSTony Lindgren s16 offset)
276874b2adbSTony Lindgren {
277874b2adbSTony Lindgren return cpcap_battery_cc_raw_div(ddata, sample,
278874b2adbSTony Lindgren accumulator, offset,
279874b2adbSTony Lindgren 3600000);
280874b2adbSTony Lindgren }
281874b2adbSTony Lindgren
cpcap_battery_cc_to_ua(struct cpcap_battery_ddata * ddata,s32 sample,s32 accumulator,s16 offset)282874b2adbSTony Lindgren static int cpcap_battery_cc_to_ua(struct cpcap_battery_ddata *ddata,
283c68b901aSTony Lindgren s32 sample, s32 accumulator,
284874b2adbSTony Lindgren s16 offset)
285874b2adbSTony Lindgren {
286874b2adbSTony Lindgren return cpcap_battery_cc_raw_div(ddata, sample,
287874b2adbSTony Lindgren accumulator, offset,
288874b2adbSTony Lindgren sample *
289874b2adbSTony Lindgren CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS);
290874b2adbSTony Lindgren }
291874b2adbSTony Lindgren
292874b2adbSTony Lindgren /**
293874b2adbSTony Lindgren * cpcap_battery_read_accumulated - reads cpcap coulomb counter
294874b2adbSTony Lindgren * @ddata: device driver data
295362fd2ecSKrzysztof Kozlowski * @ccd: coulomb counter values
296874b2adbSTony Lindgren *
297874b2adbSTony Lindgren * Based on Motorola mapphone kernel function data_read_regs().
298874b2adbSTony Lindgren * Looking at the registers, the coulomb counter seems similar to
299874b2adbSTony Lindgren * the coulomb counter in TWL6030. See "TWL6030 Gas Gauging Basics
300874b2adbSTony Lindgren * (Rev. A) swca095a.pdf for "10 Calculating Accumulated Current".
301874b2adbSTony Lindgren *
302874b2adbSTony Lindgren * Note that swca095a.pdf instructs to stop the coulomb counter
303874b2adbSTony Lindgren * before reading to avoid values changing. Motorola mapphone
304874b2adbSTony Lindgren * Linux kernel does not do it, so let's assume they've verified
305874b2adbSTony Lindgren * the data produced is correct.
306874b2adbSTony Lindgren */
307874b2adbSTony Lindgren static int
cpcap_battery_read_accumulated(struct cpcap_battery_ddata * ddata,struct cpcap_coulomb_counter_data * ccd)308874b2adbSTony Lindgren cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata,
309874b2adbSTony Lindgren struct cpcap_coulomb_counter_data *ccd)
310874b2adbSTony Lindgren {
311b28ac419STony Lindgren u16 buf[7]; /* CPCAP_REG_CCS1 to CCI */
312874b2adbSTony Lindgren int error;
313874b2adbSTony Lindgren
314874b2adbSTony Lindgren ccd->sample = 0;
315874b2adbSTony Lindgren ccd->accumulator = 0;
316874b2adbSTony Lindgren ccd->offset = 0;
317b28ac419STony Lindgren ccd->integrator = 0;
318874b2adbSTony Lindgren
319874b2adbSTony Lindgren /* Read coulomb counter register range */
320874b2adbSTony Lindgren error = regmap_bulk_read(ddata->reg, CPCAP_REG_CCS1,
321874b2adbSTony Lindgren buf, ARRAY_SIZE(buf));
322874b2adbSTony Lindgren if (error)
323874b2adbSTony Lindgren return 0;
324874b2adbSTony Lindgren
325874b2adbSTony Lindgren /* Sample value CPCAP_REG_CCS1 & 2 */
326874b2adbSTony Lindgren ccd->sample = (buf[1] & 0x0fff) << 16;
327874b2adbSTony Lindgren ccd->sample |= buf[0];
328c68b901aSTony Lindgren if (ddata->vendor == CPCAP_VENDOR_TI)
329c68b901aSTony Lindgren ccd->sample = sign_extend32(24, ccd->sample);
330874b2adbSTony Lindgren
331874b2adbSTony Lindgren /* Accumulator value CPCAP_REG_CCA1 & 2 */
332874b2adbSTony Lindgren ccd->accumulator = ((s16)buf[3]) << 16;
333874b2adbSTony Lindgren ccd->accumulator |= buf[2];
334874b2adbSTony Lindgren
33535439b7aSTony Lindgren /*
33635439b7aSTony Lindgren * Coulomb counter calibration offset is CPCAP_REG_CCM,
33735439b7aSTony Lindgren * REG_CCO seems unused
33835439b7aSTony Lindgren */
33935439b7aSTony Lindgren ccd->offset = buf[4];
34035439b7aSTony Lindgren ccd->offset = sign_extend32(ccd->offset, 9);
341874b2adbSTony Lindgren
342b28ac419STony Lindgren /* Integrator register CPCAP_REG_CCI */
343b28ac419STony Lindgren if (ddata->vendor == CPCAP_VENDOR_TI)
344b28ac419STony Lindgren ccd->integrator = sign_extend32(buf[6], 13);
345b28ac419STony Lindgren else
346b28ac419STony Lindgren ccd->integrator = (s16)buf[6];
347b28ac419STony Lindgren
348874b2adbSTony Lindgren return cpcap_battery_cc_to_uah(ddata,
349874b2adbSTony Lindgren ccd->sample,
350874b2adbSTony Lindgren ccd->accumulator,
351874b2adbSTony Lindgren ccd->offset);
352874b2adbSTony Lindgren }
353874b2adbSTony Lindgren
354fd46821eSCarl Philipp Klemm
355fd46821eSCarl Philipp Klemm /*
356fd46821eSCarl Philipp Klemm * Based on the values from Motorola mapphone Linux kernel for the
357fd46821eSCarl Philipp Klemm * stock Droid 4 battery eb41. In the Motorola mapphone Linux
358fd46821eSCarl Philipp Klemm * kernel tree the value for pm_cd_factor is passed to the kernel
359fd46821eSCarl Philipp Klemm * via device tree. If it turns out to be something device specific
360fd46821eSCarl Philipp Klemm * we can consider that too later. These values are also fine for
361fd46821eSCarl Philipp Klemm * Bionic's hw4x.
362fd46821eSCarl Philipp Klemm *
363fd46821eSCarl Philipp Klemm * And looking at the battery full and shutdown values for the stock
364fd46821eSCarl Philipp Klemm * kernel on droid 4, full is 4351000 and software initiates shutdown
365fd46821eSCarl Philipp Klemm * at 3078000. The device will die around 2743000.
366fd46821eSCarl Philipp Klemm */
367fd46821eSCarl Philipp Klemm static const struct cpcap_battery_config cpcap_battery_eb41_data = {
368fd46821eSCarl Philipp Klemm .cd_factor = 0x3cc,
369fd46821eSCarl Philipp Klemm .info.technology = POWER_SUPPLY_TECHNOLOGY_LION,
370fd46821eSCarl Philipp Klemm .info.voltage_max_design = 4351000,
371fd46821eSCarl Philipp Klemm .info.voltage_min_design = 3100000,
372fd46821eSCarl Philipp Klemm .info.charge_full_design = 1740000,
373fd46821eSCarl Philipp Klemm .bat.constant_charge_voltage_max_uv = 4200000,
374fd46821eSCarl Philipp Klemm };
375fd46821eSCarl Philipp Klemm
376fd46821eSCarl Philipp Klemm /* Values for the extended Droid Bionic battery bw8x. */
377fd46821eSCarl Philipp Klemm static const struct cpcap_battery_config cpcap_battery_bw8x_data = {
378fd46821eSCarl Philipp Klemm .cd_factor = 0x3cc,
379fd46821eSCarl Philipp Klemm .info.technology = POWER_SUPPLY_TECHNOLOGY_LION,
380fd46821eSCarl Philipp Klemm .info.voltage_max_design = 4200000,
381fd46821eSCarl Philipp Klemm .info.voltage_min_design = 3200000,
382fd46821eSCarl Philipp Klemm .info.charge_full_design = 2760000,
383fd46821eSCarl Philipp Klemm .bat.constant_charge_voltage_max_uv = 4200000,
384fd46821eSCarl Philipp Klemm };
385fd46821eSCarl Philipp Klemm
386fd46821eSCarl Philipp Klemm /*
387fd46821eSCarl Philipp Klemm * Safe values for any lipo battery likely to fit into a mapphone
388fd46821eSCarl Philipp Klemm * battery bay.
389fd46821eSCarl Philipp Klemm */
390fd46821eSCarl Philipp Klemm static const struct cpcap_battery_config cpcap_battery_unkown_data = {
391fd46821eSCarl Philipp Klemm .cd_factor = 0x3cc,
392fd46821eSCarl Philipp Klemm .info.technology = POWER_SUPPLY_TECHNOLOGY_LION,
393fd46821eSCarl Philipp Klemm .info.voltage_max_design = 4200000,
394fd46821eSCarl Philipp Klemm .info.voltage_min_design = 3200000,
395fd46821eSCarl Philipp Klemm .info.charge_full_design = 3000000,
396fd46821eSCarl Philipp Klemm .bat.constant_charge_voltage_max_uv = 4200000,
397fd46821eSCarl Philipp Klemm };
398fd46821eSCarl Philipp Klemm
cpcap_battery_match_nvmem(struct device * dev,const void * data)399fd46821eSCarl Philipp Klemm static int cpcap_battery_match_nvmem(struct device *dev, const void *data)
400fd46821eSCarl Philipp Klemm {
401fd46821eSCarl Philipp Klemm if (strcmp(dev_name(dev), "89-500029ba0f73") == 0)
402fd46821eSCarl Philipp Klemm return 1;
403fd46821eSCarl Philipp Klemm else
404fd46821eSCarl Philipp Klemm return 0;
405fd46821eSCarl Philipp Klemm }
406fd46821eSCarl Philipp Klemm
cpcap_battery_detect_battery_type(struct cpcap_battery_ddata * ddata)407fd46821eSCarl Philipp Klemm static void cpcap_battery_detect_battery_type(struct cpcap_battery_ddata *ddata)
408fd46821eSCarl Philipp Klemm {
409fd46821eSCarl Philipp Klemm struct nvmem_device *nvmem;
410fd46821eSCarl Philipp Klemm u8 battery_id = 0;
411fd46821eSCarl Philipp Klemm
412fd46821eSCarl Philipp Klemm ddata->check_nvmem = false;
413fd46821eSCarl Philipp Klemm
414fd46821eSCarl Philipp Klemm nvmem = nvmem_device_find(NULL, &cpcap_battery_match_nvmem);
415fd46821eSCarl Philipp Klemm if (IS_ERR_OR_NULL(nvmem)) {
416fd46821eSCarl Philipp Klemm ddata->check_nvmem = true;
417fd46821eSCarl Philipp Klemm dev_info_once(ddata->dev, "Can not find battery nvmem device. Assuming generic lipo battery\n");
418fd46821eSCarl Philipp Klemm } else if (nvmem_device_read(nvmem, 2, 1, &battery_id) < 0) {
419fd46821eSCarl Philipp Klemm battery_id = 0;
420fd46821eSCarl Philipp Klemm ddata->check_nvmem = true;
421fd46821eSCarl Philipp Klemm dev_warn(ddata->dev, "Can not read battery nvmem device. Assuming generic lipo battery\n");
422fd46821eSCarl Philipp Klemm }
423fd46821eSCarl Philipp Klemm
424fd46821eSCarl Philipp Klemm switch (battery_id) {
425fd46821eSCarl Philipp Klemm case CPCAP_BATTERY_EB41_HW4X_ID:
426fd46821eSCarl Philipp Klemm ddata->config = cpcap_battery_eb41_data;
427fd46821eSCarl Philipp Klemm break;
428fd46821eSCarl Philipp Klemm case CPCAP_BATTERY_BW8X_ID:
429fd46821eSCarl Philipp Klemm ddata->config = cpcap_battery_bw8x_data;
430fd46821eSCarl Philipp Klemm break;
431fd46821eSCarl Philipp Klemm default:
432fd46821eSCarl Philipp Klemm ddata->config = cpcap_battery_unkown_data;
433fd46821eSCarl Philipp Klemm }
434fd46821eSCarl Philipp Klemm }
435fd46821eSCarl Philipp Klemm
436874b2adbSTony Lindgren /**
437874b2adbSTony Lindgren * cpcap_battery_cc_get_avg_current - read cpcap coulumb counter
438874b2adbSTony Lindgren * @ddata: cpcap battery driver device data
439874b2adbSTony Lindgren */
cpcap_battery_cc_get_avg_current(struct cpcap_battery_ddata * ddata)440874b2adbSTony Lindgren static int cpcap_battery_cc_get_avg_current(struct cpcap_battery_ddata *ddata)
441874b2adbSTony Lindgren {
442874b2adbSTony Lindgren int value, acc, error;
443ac437c1cSTony Lindgren s32 sample;
444874b2adbSTony Lindgren s16 offset;
445874b2adbSTony Lindgren
446874b2adbSTony Lindgren /* Coulomb counter integrator */
447874b2adbSTony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCI, &value);
448874b2adbSTony Lindgren if (error)
449874b2adbSTony Lindgren return error;
450874b2adbSTony Lindgren
451ac437c1cSTony Lindgren if (ddata->vendor == CPCAP_VENDOR_TI) {
452ac437c1cSTony Lindgren acc = sign_extend32(value, 13);
453ac437c1cSTony Lindgren sample = 1;
454ac437c1cSTony Lindgren } else {
455874b2adbSTony Lindgren acc = (s16)value;
456ac437c1cSTony Lindgren sample = 4;
457ac437c1cSTony Lindgren }
458874b2adbSTony Lindgren
459ac437c1cSTony Lindgren /* Coulomb counter calibration offset */
460874b2adbSTony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCM, &value);
461874b2adbSTony Lindgren if (error)
462874b2adbSTony Lindgren return error;
463874b2adbSTony Lindgren
464ac437c1cSTony Lindgren offset = sign_extend32(value, 9);
465874b2adbSTony Lindgren
466874b2adbSTony Lindgren return cpcap_battery_cc_to_ua(ddata, sample, acc, offset);
467874b2adbSTony Lindgren }
468874b2adbSTony Lindgren
cpcap_battery_get_charger_status(struct cpcap_battery_ddata * ddata,int * val)469bb8b9a98STony Lindgren static int cpcap_battery_get_charger_status(struct cpcap_battery_ddata *ddata,
470bb8b9a98STony Lindgren int *val)
471bb8b9a98STony Lindgren {
472bb8b9a98STony Lindgren union power_supply_propval prop;
473bb8b9a98STony Lindgren struct power_supply *charger;
474bb8b9a98STony Lindgren int error;
475bb8b9a98STony Lindgren
476bb8b9a98STony Lindgren charger = power_supply_get_by_name("usb");
477bb8b9a98STony Lindgren if (!charger)
478bb8b9a98STony Lindgren return -ENODEV;
479bb8b9a98STony Lindgren
480bb8b9a98STony Lindgren error = power_supply_get_property(charger, POWER_SUPPLY_PROP_STATUS,
481bb8b9a98STony Lindgren &prop);
482bb8b9a98STony Lindgren if (error)
483bb8b9a98STony Lindgren *val = POWER_SUPPLY_STATUS_UNKNOWN;
484bb8b9a98STony Lindgren else
485bb8b9a98STony Lindgren *val = prop.intval;
486bb8b9a98STony Lindgren
487bb8b9a98STony Lindgren power_supply_put(charger);
488bb8b9a98STony Lindgren
489bb8b9a98STony Lindgren return error;
490bb8b9a98STony Lindgren }
491bb8b9a98STony Lindgren
cpcap_battery_full(struct cpcap_battery_ddata * ddata)492874b2adbSTony Lindgren static bool cpcap_battery_full(struct cpcap_battery_ddata *ddata)
493874b2adbSTony Lindgren {
494874b2adbSTony Lindgren struct cpcap_battery_state_data *state = cpcap_battery_latest(ddata);
495bb8b9a98STony Lindgren unsigned int vfull;
496bb8b9a98STony Lindgren int error, val;
497874b2adbSTony Lindgren
498bb8b9a98STony Lindgren error = cpcap_battery_get_charger_status(ddata, &val);
499bb8b9a98STony Lindgren if (!error) {
500bb8b9a98STony Lindgren switch (val) {
501bb8b9a98STony Lindgren case POWER_SUPPLY_STATUS_DISCHARGING:
502bb8b9a98STony Lindgren dev_dbg(ddata->dev, "charger disconnected\n");
503bb8b9a98STony Lindgren ddata->is_full = 0;
504bb8b9a98STony Lindgren break;
505bb8b9a98STony Lindgren case POWER_SUPPLY_STATUS_FULL:
506bb8b9a98STony Lindgren dev_dbg(ddata->dev, "charger full status\n");
507bb8b9a98STony Lindgren ddata->is_full = 1;
508bb8b9a98STony Lindgren break;
509bb8b9a98STony Lindgren default:
510bb8b9a98STony Lindgren break;
511bb8b9a98STony Lindgren }
512bb8b9a98STony Lindgren }
513874b2adbSTony Lindgren
514bb8b9a98STony Lindgren /*
515bb8b9a98STony Lindgren * The full battery voltage here can be inaccurate, it's used just to
516bb8b9a98STony Lindgren * filter out any trickle charging events. We clear the is_full status
517bb8b9a98STony Lindgren * on charger disconnect above anyways.
518bb8b9a98STony Lindgren */
519bb8b9a98STony Lindgren vfull = ddata->config.bat.constant_charge_voltage_max_uv - 120000;
520bb8b9a98STony Lindgren
521bb8b9a98STony Lindgren if (ddata->is_full && state->voltage < vfull)
522bb8b9a98STony Lindgren ddata->is_full = 0;
523bb8b9a98STony Lindgren
524bb8b9a98STony Lindgren return ddata->is_full;
525874b2adbSTony Lindgren }
526874b2adbSTony Lindgren
cpcap_battery_low(struct cpcap_battery_ddata * ddata)527faf6e900SArthur Demchenkov static bool cpcap_battery_low(struct cpcap_battery_ddata *ddata)
528faf6e900SArthur Demchenkov {
529faf6e900SArthur Demchenkov struct cpcap_battery_state_data *state = cpcap_battery_latest(ddata);
530faf6e900SArthur Demchenkov static bool is_low;
531faf6e900SArthur Demchenkov
532faf6e900SArthur Demchenkov if (state->current_ua > 0 && (state->voltage <= 3350000 || is_low))
533faf6e900SArthur Demchenkov is_low = true;
534faf6e900SArthur Demchenkov else
535faf6e900SArthur Demchenkov is_low = false;
536faf6e900SArthur Demchenkov
537faf6e900SArthur Demchenkov return is_low;
538faf6e900SArthur Demchenkov }
539faf6e900SArthur Demchenkov
cpcap_battery_update_status(struct cpcap_battery_ddata * ddata)540874b2adbSTony Lindgren static int cpcap_battery_update_status(struct cpcap_battery_ddata *ddata)
541874b2adbSTony Lindgren {
542faf6e900SArthur Demchenkov struct cpcap_battery_state_data state, *latest, *previous,
543faf6e900SArthur Demchenkov *empty, *full;
544874b2adbSTony Lindgren ktime_t now;
545874b2adbSTony Lindgren int error;
546874b2adbSTony Lindgren
547874b2adbSTony Lindgren memset(&state, 0, sizeof(state));
548874b2adbSTony Lindgren now = ktime_get();
549874b2adbSTony Lindgren
550874b2adbSTony Lindgren latest = cpcap_battery_latest(ddata);
551874b2adbSTony Lindgren if (latest) {
552874b2adbSTony Lindgren s64 delta_ms = ktime_to_ms(ktime_sub(now, latest->time));
553874b2adbSTony Lindgren
554874b2adbSTony Lindgren if (delta_ms < CPCAP_BATTERY_CC_SAMPLE_PERIOD_MS)
555874b2adbSTony Lindgren return delta_ms;
556874b2adbSTony Lindgren }
557874b2adbSTony Lindgren
558874b2adbSTony Lindgren state.time = now;
559874b2adbSTony Lindgren state.voltage = cpcap_battery_get_voltage(ddata);
560874b2adbSTony Lindgren state.current_ua = cpcap_battery_get_current(ddata);
561874b2adbSTony Lindgren state.counter_uah = cpcap_battery_read_accumulated(ddata, &state.cc);
562874b2adbSTony Lindgren
563874b2adbSTony Lindgren error = cpcap_charger_battery_temperature(ddata,
564874b2adbSTony Lindgren &state.temperature);
565874b2adbSTony Lindgren if (error)
566874b2adbSTony Lindgren return error;
567874b2adbSTony Lindgren
568874b2adbSTony Lindgren previous = cpcap_battery_previous(ddata);
569874b2adbSTony Lindgren memcpy(previous, latest, sizeof(*previous));
570874b2adbSTony Lindgren memcpy(latest, &state, sizeof(*latest));
571874b2adbSTony Lindgren
572faf6e900SArthur Demchenkov if (cpcap_battery_full(ddata)) {
573faf6e900SArthur Demchenkov full = cpcap_battery_get_full(ddata);
574faf6e900SArthur Demchenkov memcpy(full, latest, sizeof(*full));
575faf6e900SArthur Demchenkov
576faf6e900SArthur Demchenkov empty = cpcap_battery_get_empty(ddata);
577faf6e900SArthur Demchenkov if (empty->voltage && empty->voltage != -1) {
578faf6e900SArthur Demchenkov empty->voltage = -1;
579faf6e900SArthur Demchenkov ddata->charge_full =
580faf6e900SArthur Demchenkov empty->counter_uah - full->counter_uah;
581faf6e900SArthur Demchenkov } else if (ddata->charge_full) {
582faf6e900SArthur Demchenkov empty->voltage = -1;
583faf6e900SArthur Demchenkov empty->counter_uah =
584faf6e900SArthur Demchenkov full->counter_uah + ddata->charge_full;
585faf6e900SArthur Demchenkov }
586faf6e900SArthur Demchenkov } else if (cpcap_battery_low(ddata)) {
587faf6e900SArthur Demchenkov empty = cpcap_battery_get_empty(ddata);
588faf6e900SArthur Demchenkov memcpy(empty, latest, sizeof(*empty));
589faf6e900SArthur Demchenkov
590faf6e900SArthur Demchenkov full = cpcap_battery_get_full(ddata);
591faf6e900SArthur Demchenkov if (full->voltage) {
592faf6e900SArthur Demchenkov full->voltage = 0;
593faf6e900SArthur Demchenkov ddata->charge_full =
594faf6e900SArthur Demchenkov empty->counter_uah - full->counter_uah;
595faf6e900SArthur Demchenkov }
596faf6e900SArthur Demchenkov }
597faf6e900SArthur Demchenkov
598874b2adbSTony Lindgren return 0;
599874b2adbSTony Lindgren }
600874b2adbSTony Lindgren
6012071236bSTony Lindgren /*
6022071236bSTony Lindgren * Update battery status when cpcap-charger calls power_supply_changed().
6032071236bSTony Lindgren * This allows us to detect battery full condition before the charger
6042071236bSTony Lindgren * disconnects.
6052071236bSTony Lindgren */
cpcap_battery_external_power_changed(struct power_supply * psy)6062071236bSTony Lindgren static void cpcap_battery_external_power_changed(struct power_supply *psy)
6072071236bSTony Lindgren {
6082071236bSTony Lindgren union power_supply_propval prop;
6092071236bSTony Lindgren
6102071236bSTony Lindgren power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS, &prop);
6112071236bSTony Lindgren }
6122071236bSTony Lindgren
613874b2adbSTony Lindgren static enum power_supply_property cpcap_battery_props[] = {
614874b2adbSTony Lindgren POWER_SUPPLY_PROP_STATUS,
615874b2adbSTony Lindgren POWER_SUPPLY_PROP_PRESENT,
616874b2adbSTony Lindgren POWER_SUPPLY_PROP_TECHNOLOGY,
617874b2adbSTony Lindgren POWER_SUPPLY_PROP_VOLTAGE_NOW,
618874b2adbSTony Lindgren POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
619874b2adbSTony Lindgren POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
6208b0134ccSTony Lindgren POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
621874b2adbSTony Lindgren POWER_SUPPLY_PROP_CURRENT_AVG,
622874b2adbSTony Lindgren POWER_SUPPLY_PROP_CURRENT_NOW,
6234fb0357cSArthur Demchenkov POWER_SUPPLY_PROP_CHARGE_FULL,
6240f596487SArthur Demchenkov POWER_SUPPLY_PROP_CHARGE_NOW,
625874b2adbSTony Lindgren POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
626874b2adbSTony Lindgren POWER_SUPPLY_PROP_CHARGE_COUNTER,
627874b2adbSTony Lindgren POWER_SUPPLY_PROP_POWER_NOW,
628874b2adbSTony Lindgren POWER_SUPPLY_PROP_POWER_AVG,
6291e64926cSArthur Demchenkov POWER_SUPPLY_PROP_CAPACITY,
630874b2adbSTony Lindgren POWER_SUPPLY_PROP_CAPACITY_LEVEL,
631874b2adbSTony Lindgren POWER_SUPPLY_PROP_SCOPE,
632874b2adbSTony Lindgren POWER_SUPPLY_PROP_TEMP,
633874b2adbSTony Lindgren };
634874b2adbSTony Lindgren
cpcap_battery_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)635874b2adbSTony Lindgren static int cpcap_battery_get_property(struct power_supply *psy,
636874b2adbSTony Lindgren enum power_supply_property psp,
637874b2adbSTony Lindgren union power_supply_propval *val)
638874b2adbSTony Lindgren {
639874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata = power_supply_get_drvdata(psy);
6401e64926cSArthur Demchenkov struct cpcap_battery_state_data *latest, *previous, *empty;
641874b2adbSTony Lindgren u32 sample;
642874b2adbSTony Lindgren s32 accumulator;
643874b2adbSTony Lindgren int cached;
644874b2adbSTony Lindgren s64 tmp;
645874b2adbSTony Lindgren
646874b2adbSTony Lindgren cached = cpcap_battery_update_status(ddata);
647874b2adbSTony Lindgren if (cached < 0)
648874b2adbSTony Lindgren return cached;
649874b2adbSTony Lindgren
650874b2adbSTony Lindgren latest = cpcap_battery_latest(ddata);
651874b2adbSTony Lindgren previous = cpcap_battery_previous(ddata);
652874b2adbSTony Lindgren
653fd46821eSCarl Philipp Klemm if (ddata->check_nvmem)
654fd46821eSCarl Philipp Klemm cpcap_battery_detect_battery_type(ddata);
655fd46821eSCarl Philipp Klemm
656874b2adbSTony Lindgren switch (psp) {
657874b2adbSTony Lindgren case POWER_SUPPLY_PROP_PRESENT:
65834fb2a95SCarl Philipp Klemm if (latest->temperature > CPCAP_NO_BATTERY || ignore_temperature_probe)
659874b2adbSTony Lindgren val->intval = 1;
660874b2adbSTony Lindgren else
661874b2adbSTony Lindgren val->intval = 0;
662874b2adbSTony Lindgren break;
663874b2adbSTony Lindgren case POWER_SUPPLY_PROP_STATUS:
664874b2adbSTony Lindgren if (cpcap_battery_full(ddata)) {
665874b2adbSTony Lindgren val->intval = POWER_SUPPLY_STATUS_FULL;
666874b2adbSTony Lindgren break;
667874b2adbSTony Lindgren }
668874b2adbSTony Lindgren if (cpcap_battery_cc_get_avg_current(ddata) < 0)
669874b2adbSTony Lindgren val->intval = POWER_SUPPLY_STATUS_CHARGING;
670874b2adbSTony Lindgren else
671874b2adbSTony Lindgren val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
672874b2adbSTony Lindgren break;
673874b2adbSTony Lindgren case POWER_SUPPLY_PROP_TECHNOLOGY:
674874b2adbSTony Lindgren val->intval = ddata->config.info.technology;
675874b2adbSTony Lindgren break;
676874b2adbSTony Lindgren case POWER_SUPPLY_PROP_VOLTAGE_NOW:
677874b2adbSTony Lindgren val->intval = cpcap_battery_get_voltage(ddata);
678874b2adbSTony Lindgren break;
679874b2adbSTony Lindgren case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
680874b2adbSTony Lindgren val->intval = ddata->config.info.voltage_max_design;
681874b2adbSTony Lindgren break;
682874b2adbSTony Lindgren case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
683874b2adbSTony Lindgren val->intval = ddata->config.info.voltage_min_design;
684874b2adbSTony Lindgren break;
6858b0134ccSTony Lindgren case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
6868b0134ccSTony Lindgren val->intval = ddata->config.bat.constant_charge_voltage_max_uv;
6878b0134ccSTony Lindgren break;
688874b2adbSTony Lindgren case POWER_SUPPLY_PROP_CURRENT_AVG:
6895fc27a54STony Lindgren sample = latest->cc.sample - previous->cc.sample;
6905fc27a54STony Lindgren if (!sample) {
691874b2adbSTony Lindgren val->intval = cpcap_battery_cc_get_avg_current(ddata);
692874b2adbSTony Lindgren break;
693874b2adbSTony Lindgren }
694874b2adbSTony Lindgren accumulator = latest->cc.accumulator - previous->cc.accumulator;
695874b2adbSTony Lindgren val->intval = cpcap_battery_cc_to_ua(ddata, sample,
696874b2adbSTony Lindgren accumulator,
697874b2adbSTony Lindgren latest->cc.offset);
698874b2adbSTony Lindgren break;
699874b2adbSTony Lindgren case POWER_SUPPLY_PROP_CURRENT_NOW:
700874b2adbSTony Lindgren val->intval = latest->current_ua;
701874b2adbSTony Lindgren break;
702874b2adbSTony Lindgren case POWER_SUPPLY_PROP_CHARGE_COUNTER:
703874b2adbSTony Lindgren val->intval = latest->counter_uah;
704874b2adbSTony Lindgren break;
705874b2adbSTony Lindgren case POWER_SUPPLY_PROP_POWER_NOW:
706874b2adbSTony Lindgren tmp = (latest->voltage / 10000) * latest->current_ua;
707874b2adbSTony Lindgren val->intval = div64_s64(tmp, 100);
708874b2adbSTony Lindgren break;
709874b2adbSTony Lindgren case POWER_SUPPLY_PROP_POWER_AVG:
7105fc27a54STony Lindgren sample = latest->cc.sample - previous->cc.sample;
7115fc27a54STony Lindgren if (!sample) {
712874b2adbSTony Lindgren tmp = cpcap_battery_cc_get_avg_current(ddata);
713874b2adbSTony Lindgren tmp *= (latest->voltage / 10000);
714874b2adbSTony Lindgren val->intval = div64_s64(tmp, 100);
715874b2adbSTony Lindgren break;
716874b2adbSTony Lindgren }
717874b2adbSTony Lindgren accumulator = latest->cc.accumulator - previous->cc.accumulator;
718874b2adbSTony Lindgren tmp = cpcap_battery_cc_to_ua(ddata, sample, accumulator,
719874b2adbSTony Lindgren latest->cc.offset);
720874b2adbSTony Lindgren tmp *= ((latest->voltage + previous->voltage) / 20000);
721874b2adbSTony Lindgren val->intval = div64_s64(tmp, 100);
722874b2adbSTony Lindgren break;
7231e64926cSArthur Demchenkov case POWER_SUPPLY_PROP_CAPACITY:
7241e64926cSArthur Demchenkov empty = cpcap_battery_get_empty(ddata);
7251e64926cSArthur Demchenkov if (!empty->voltage || !ddata->charge_full)
7261e64926cSArthur Demchenkov return -ENODATA;
7271e64926cSArthur Demchenkov /* (ddata->charge_full / 200) is needed for rounding */
7281e64926cSArthur Demchenkov val->intval = empty->counter_uah - latest->counter_uah +
7291e64926cSArthur Demchenkov ddata->charge_full / 200;
7301e64926cSArthur Demchenkov val->intval = clamp(val->intval, 0, ddata->charge_full);
7311e64926cSArthur Demchenkov val->intval = val->intval * 100 / ddata->charge_full;
7321e64926cSArthur Demchenkov break;
733874b2adbSTony Lindgren case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
734874b2adbSTony Lindgren if (cpcap_battery_full(ddata))
735874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
736874b2adbSTony Lindgren else if (latest->voltage >= 3750000)
737874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
738874b2adbSTony Lindgren else if (latest->voltage >= 3300000)
739874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
740874b2adbSTony Lindgren else if (latest->voltage > 3100000)
741874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
742874b2adbSTony Lindgren else if (latest->voltage <= 3100000)
743874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
744874b2adbSTony Lindgren else
745874b2adbSTony Lindgren val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
746874b2adbSTony Lindgren break;
7470f596487SArthur Demchenkov case POWER_SUPPLY_PROP_CHARGE_NOW:
7480f596487SArthur Demchenkov empty = cpcap_battery_get_empty(ddata);
7490f596487SArthur Demchenkov if (!empty->voltage)
7500f596487SArthur Demchenkov return -ENODATA;
7510f596487SArthur Demchenkov val->intval = empty->counter_uah - latest->counter_uah;
752aecd127bSCarl Philipp Klemm if (val->intval < 0) {
753aecd127bSCarl Philipp Klemm /* Assume invalid config if CHARGE_NOW is -20% */
754aecd127bSCarl Philipp Klemm if (ddata->charge_full && abs(val->intval) > ddata->charge_full/5) {
755aecd127bSCarl Philipp Klemm empty->voltage = 0;
756aecd127bSCarl Philipp Klemm ddata->charge_full = 0;
757aecd127bSCarl Philipp Klemm return -ENODATA;
758aecd127bSCarl Philipp Klemm }
7590f596487SArthur Demchenkov val->intval = 0;
760aecd127bSCarl Philipp Klemm } else if (ddata->charge_full && ddata->charge_full < val->intval) {
761aecd127bSCarl Philipp Klemm /* Assume invalid config if CHARGE_NOW exceeds CHARGE_FULL by 20% */
762aecd127bSCarl Philipp Klemm if (val->intval > (6*ddata->charge_full)/5) {
763aecd127bSCarl Philipp Klemm empty->voltage = 0;
764aecd127bSCarl Philipp Klemm ddata->charge_full = 0;
765aecd127bSCarl Philipp Klemm return -ENODATA;
766aecd127bSCarl Philipp Klemm }
7670f596487SArthur Demchenkov val->intval = ddata->charge_full;
768aecd127bSCarl Philipp Klemm }
7690f596487SArthur Demchenkov break;
7704fb0357cSArthur Demchenkov case POWER_SUPPLY_PROP_CHARGE_FULL:
7714fb0357cSArthur Demchenkov if (!ddata->charge_full)
7724fb0357cSArthur Demchenkov return -ENODATA;
7734fb0357cSArthur Demchenkov val->intval = ddata->charge_full;
7744fb0357cSArthur Demchenkov break;
775874b2adbSTony Lindgren case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
776874b2adbSTony Lindgren val->intval = ddata->config.info.charge_full_design;
777874b2adbSTony Lindgren break;
778874b2adbSTony Lindgren case POWER_SUPPLY_PROP_SCOPE:
779874b2adbSTony Lindgren val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
780874b2adbSTony Lindgren break;
781874b2adbSTony Lindgren case POWER_SUPPLY_PROP_TEMP:
78234fb2a95SCarl Philipp Klemm if (ignore_temperature_probe)
78334fb2a95SCarl Philipp Klemm return -ENODATA;
784874b2adbSTony Lindgren val->intval = latest->temperature;
785874b2adbSTony Lindgren break;
786874b2adbSTony Lindgren default:
787874b2adbSTony Lindgren return -EINVAL;
788874b2adbSTony Lindgren }
789874b2adbSTony Lindgren
790874b2adbSTony Lindgren return 0;
791874b2adbSTony Lindgren }
792874b2adbSTony Lindgren
cpcap_battery_update_charger(struct cpcap_battery_ddata * ddata,int const_charge_voltage)7938b0134ccSTony Lindgren static int cpcap_battery_update_charger(struct cpcap_battery_ddata *ddata,
7948b0134ccSTony Lindgren int const_charge_voltage)
7958b0134ccSTony Lindgren {
7968b0134ccSTony Lindgren union power_supply_propval prop;
7978b0134ccSTony Lindgren union power_supply_propval val;
7988b0134ccSTony Lindgren struct power_supply *charger;
7998b0134ccSTony Lindgren int error;
8008b0134ccSTony Lindgren
8018b0134ccSTony Lindgren charger = power_supply_get_by_name("usb");
8028b0134ccSTony Lindgren if (!charger)
8038b0134ccSTony Lindgren return -ENODEV;
8048b0134ccSTony Lindgren
8058b0134ccSTony Lindgren error = power_supply_get_property(charger,
8068b0134ccSTony Lindgren POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
8078b0134ccSTony Lindgren &prop);
8088b0134ccSTony Lindgren if (error)
80997456a24STony Lindgren goto out_put;
8108b0134ccSTony Lindgren
8118b0134ccSTony Lindgren /* Allow charger const voltage lower than battery const voltage */
8128b0134ccSTony Lindgren if (const_charge_voltage > prop.intval)
81397456a24STony Lindgren goto out_put;
8148b0134ccSTony Lindgren
8158b0134ccSTony Lindgren val.intval = const_charge_voltage;
8168b0134ccSTony Lindgren
81797456a24STony Lindgren error = power_supply_set_property(charger,
8188b0134ccSTony Lindgren POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
8198b0134ccSTony Lindgren &val);
82097456a24STony Lindgren out_put:
82197456a24STony Lindgren power_supply_put(charger);
82297456a24STony Lindgren
82397456a24STony Lindgren return error;
8248b0134ccSTony Lindgren }
8258b0134ccSTony Lindgren
cpcap_battery_set_property(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)8268b0134ccSTony Lindgren static int cpcap_battery_set_property(struct power_supply *psy,
8278b0134ccSTony Lindgren enum power_supply_property psp,
8288b0134ccSTony Lindgren const union power_supply_propval *val)
8298b0134ccSTony Lindgren {
8308b0134ccSTony Lindgren struct cpcap_battery_ddata *ddata = power_supply_get_drvdata(psy);
8318b0134ccSTony Lindgren
8328b0134ccSTony Lindgren switch (psp) {
8338b0134ccSTony Lindgren case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
8348b0134ccSTony Lindgren if (val->intval < ddata->config.info.voltage_min_design)
8358b0134ccSTony Lindgren return -EINVAL;
8368b0134ccSTony Lindgren if (val->intval > ddata->config.info.voltage_max_design)
8378b0134ccSTony Lindgren return -EINVAL;
8388b0134ccSTony Lindgren
8398b0134ccSTony Lindgren ddata->config.bat.constant_charge_voltage_max_uv = val->intval;
8408b0134ccSTony Lindgren
8418b0134ccSTony Lindgren return cpcap_battery_update_charger(ddata, val->intval);
8424fb0357cSArthur Demchenkov case POWER_SUPPLY_PROP_CHARGE_FULL:
8434fb0357cSArthur Demchenkov if (val->intval < 0)
8444fb0357cSArthur Demchenkov return -EINVAL;
845aecd127bSCarl Philipp Klemm if (val->intval > (6*ddata->config.info.charge_full_design)/5)
8464fb0357cSArthur Demchenkov return -EINVAL;
8474fb0357cSArthur Demchenkov
8484fb0357cSArthur Demchenkov ddata->charge_full = val->intval;
8494fb0357cSArthur Demchenkov
8504fb0357cSArthur Demchenkov return 0;
8518b0134ccSTony Lindgren default:
8528b0134ccSTony Lindgren return -EINVAL;
8538b0134ccSTony Lindgren }
8548b0134ccSTony Lindgren
8558b0134ccSTony Lindgren return 0;
8568b0134ccSTony Lindgren }
8578b0134ccSTony Lindgren
cpcap_battery_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)8588b0134ccSTony Lindgren static int cpcap_battery_property_is_writeable(struct power_supply *psy,
8598b0134ccSTony Lindgren enum power_supply_property psp)
8608b0134ccSTony Lindgren {
8618b0134ccSTony Lindgren switch (psp) {
8628b0134ccSTony Lindgren case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
8634fb0357cSArthur Demchenkov case POWER_SUPPLY_PROP_CHARGE_FULL:
8648b0134ccSTony Lindgren return 1;
8658b0134ccSTony Lindgren default:
8668b0134ccSTony Lindgren return 0;
8678b0134ccSTony Lindgren }
8688b0134ccSTony Lindgren }
8698b0134ccSTony Lindgren
cpcap_battery_irq_thread(int irq,void * data)870874b2adbSTony Lindgren static irqreturn_t cpcap_battery_irq_thread(int irq, void *data)
871874b2adbSTony Lindgren {
872874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata = data;
873874b2adbSTony Lindgren struct cpcap_battery_state_data *latest;
874874b2adbSTony Lindgren struct cpcap_interrupt_desc *d;
875874b2adbSTony Lindgren
876874b2adbSTony Lindgren if (!atomic_read(&ddata->active))
877874b2adbSTony Lindgren return IRQ_NONE;
878874b2adbSTony Lindgren
879874b2adbSTony Lindgren list_for_each_entry(d, &ddata->irq_list, node) {
880874b2adbSTony Lindgren if (irq == d->irq)
881874b2adbSTony Lindgren break;
882874b2adbSTony Lindgren }
883874b2adbSTony Lindgren
884d0a43c12SGuangqing Zhu if (list_entry_is_head(d, &ddata->irq_list, node))
885874b2adbSTony Lindgren return IRQ_NONE;
886874b2adbSTony Lindgren
887874b2adbSTony Lindgren latest = cpcap_battery_latest(ddata);
888874b2adbSTony Lindgren
889874b2adbSTony Lindgren switch (d->action) {
8900cb90f07STony Lindgren case CPCAP_BATTERY_IRQ_ACTION_CC_CAL_DONE:
8910cb90f07STony Lindgren dev_info(ddata->dev, "Coulomb counter calibration done\n");
8920cb90f07STony Lindgren break;
893874b2adbSTony Lindgren case CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW:
8941a9aadc8STony Lindgren if (latest->current_ua >= 0)
895639c1524STony Lindgren dev_warn(ddata->dev, "Battery low at %imV!\n",
896639c1524STony Lindgren latest->voltage / 1000);
897874b2adbSTony Lindgren break;
898874b2adbSTony Lindgren case CPCAP_BATTERY_IRQ_ACTION_POWEROFF:
899639c1524STony Lindgren if (latest->current_ua >= 0 && latest->voltage <= 3200000) {
900874b2adbSTony Lindgren dev_emerg(ddata->dev,
901639c1524STony Lindgren "Battery empty at %imV, powering off\n",
902639c1524STony Lindgren latest->voltage / 1000);
903874b2adbSTony Lindgren orderly_poweroff(true);
904874b2adbSTony Lindgren }
905874b2adbSTony Lindgren break;
906874b2adbSTony Lindgren default:
907874b2adbSTony Lindgren break;
908874b2adbSTony Lindgren }
909874b2adbSTony Lindgren
910874b2adbSTony Lindgren power_supply_changed(ddata->psy);
911874b2adbSTony Lindgren
912874b2adbSTony Lindgren return IRQ_HANDLED;
913874b2adbSTony Lindgren }
914874b2adbSTony Lindgren
cpcap_battery_init_irq(struct platform_device * pdev,struct cpcap_battery_ddata * ddata,const char * name)915874b2adbSTony Lindgren static int cpcap_battery_init_irq(struct platform_device *pdev,
916874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata,
917874b2adbSTony Lindgren const char *name)
918874b2adbSTony Lindgren {
919874b2adbSTony Lindgren struct cpcap_interrupt_desc *d;
920874b2adbSTony Lindgren int irq, error;
921874b2adbSTony Lindgren
922874b2adbSTony Lindgren irq = platform_get_irq_byname(pdev, name);
923aac79904SArvind Yadav if (irq < 0)
924aac79904SArvind Yadav return irq;
925874b2adbSTony Lindgren
926874b2adbSTony Lindgren error = devm_request_threaded_irq(ddata->dev, irq, NULL,
927874b2adbSTony Lindgren cpcap_battery_irq_thread,
928e62333e2STony Lindgren IRQF_SHARED | IRQF_ONESHOT,
929874b2adbSTony Lindgren name, ddata);
930874b2adbSTony Lindgren if (error) {
931874b2adbSTony Lindgren dev_err(ddata->dev, "could not get irq %s: %i\n",
932874b2adbSTony Lindgren name, error);
933874b2adbSTony Lindgren
934874b2adbSTony Lindgren return error;
935874b2adbSTony Lindgren }
936874b2adbSTony Lindgren
937874b2adbSTony Lindgren d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
938874b2adbSTony Lindgren if (!d)
939874b2adbSTony Lindgren return -ENOMEM;
940874b2adbSTony Lindgren
941874b2adbSTony Lindgren d->name = name;
942874b2adbSTony Lindgren d->irq = irq;
943874b2adbSTony Lindgren
9440cb90f07STony Lindgren if (!strncmp(name, "cccal", 5))
9450cb90f07STony Lindgren d->action = CPCAP_BATTERY_IRQ_ACTION_CC_CAL_DONE;
9460cb90f07STony Lindgren else if (!strncmp(name, "lowbph", 6))
947874b2adbSTony Lindgren d->action = CPCAP_BATTERY_IRQ_ACTION_BATTERY_LOW;
948874b2adbSTony Lindgren else if (!strncmp(name, "lowbpl", 6))
949874b2adbSTony Lindgren d->action = CPCAP_BATTERY_IRQ_ACTION_POWEROFF;
950874b2adbSTony Lindgren
951874b2adbSTony Lindgren list_add(&d->node, &ddata->irq_list);
952874b2adbSTony Lindgren
953874b2adbSTony Lindgren return 0;
954874b2adbSTony Lindgren }
955874b2adbSTony Lindgren
cpcap_battery_init_interrupts(struct platform_device * pdev,struct cpcap_battery_ddata * ddata)956874b2adbSTony Lindgren static int cpcap_battery_init_interrupts(struct platform_device *pdev,
957874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata)
958874b2adbSTony Lindgren {
959bd82ef08SColin Ian King static const char * const cpcap_battery_irqs[] = {
960874b2adbSTony Lindgren "eol", "lowbph", "lowbpl",
961874b2adbSTony Lindgren "chrgcurr1", "battdetb"
962874b2adbSTony Lindgren };
963874b2adbSTony Lindgren int i, error;
964874b2adbSTony Lindgren
965874b2adbSTony Lindgren for (i = 0; i < ARRAY_SIZE(cpcap_battery_irqs); i++) {
966874b2adbSTony Lindgren error = cpcap_battery_init_irq(pdev, ddata,
967874b2adbSTony Lindgren cpcap_battery_irqs[i]);
968874b2adbSTony Lindgren if (error)
969874b2adbSTony Lindgren return error;
970874b2adbSTony Lindgren }
971874b2adbSTony Lindgren
9720cb90f07STony Lindgren /* Enable calibration interrupt if already available in dts */
9730cb90f07STony Lindgren cpcap_battery_init_irq(pdev, ddata, "cccal");
9740cb90f07STony Lindgren
975874b2adbSTony Lindgren /* Enable low battery interrupts for 3.3V high and 3.1V low */
976874b2adbSTony Lindgren error = regmap_update_bits(ddata->reg, CPCAP_REG_BPEOL,
977874b2adbSTony Lindgren 0xffff,
978874b2adbSTony Lindgren CPCAP_REG_BPEOL_BIT_BATTDETEN);
979874b2adbSTony Lindgren if (error)
980874b2adbSTony Lindgren return error;
981874b2adbSTony Lindgren
982874b2adbSTony Lindgren return 0;
983874b2adbSTony Lindgren }
984874b2adbSTony Lindgren
cpcap_battery_init_iio(struct cpcap_battery_ddata * ddata)985874b2adbSTony Lindgren static int cpcap_battery_init_iio(struct cpcap_battery_ddata *ddata)
986874b2adbSTony Lindgren {
987874b2adbSTony Lindgren const char * const names[CPCAP_BATTERY_IIO_NR] = {
988874b2adbSTony Lindgren "battdetb", "battp", "chg_isense", "batti",
989874b2adbSTony Lindgren };
990874b2adbSTony Lindgren int error, i;
991874b2adbSTony Lindgren
992874b2adbSTony Lindgren for (i = 0; i < CPCAP_BATTERY_IIO_NR; i++) {
993874b2adbSTony Lindgren ddata->channels[i] = devm_iio_channel_get(ddata->dev,
994874b2adbSTony Lindgren names[i]);
995874b2adbSTony Lindgren if (IS_ERR(ddata->channels[i])) {
996874b2adbSTony Lindgren error = PTR_ERR(ddata->channels[i]);
997874b2adbSTony Lindgren goto out_err;
998874b2adbSTony Lindgren }
999874b2adbSTony Lindgren
1000874b2adbSTony Lindgren if (!ddata->channels[i]->indio_dev) {
1001874b2adbSTony Lindgren error = -ENXIO;
1002874b2adbSTony Lindgren goto out_err;
1003874b2adbSTony Lindgren }
1004874b2adbSTony Lindgren }
1005874b2adbSTony Lindgren
1006874b2adbSTony Lindgren return 0;
1007874b2adbSTony Lindgren
1008874b2adbSTony Lindgren out_err:
1009ec744270SKrzysztof Kozlowski return dev_err_probe(ddata->dev, error,
1010ec744270SKrzysztof Kozlowski "could not initialize VBUS or ID IIO\n");
1011874b2adbSTony Lindgren }
1012874b2adbSTony Lindgren
10130cb90f07STony Lindgren /* Calibrate coulomb counter */
cpcap_battery_calibrate(struct cpcap_battery_ddata * ddata)10140cb90f07STony Lindgren static int cpcap_battery_calibrate(struct cpcap_battery_ddata *ddata)
10150cb90f07STony Lindgren {
10160cb90f07STony Lindgren int error, ccc1, value;
10170cb90f07STony Lindgren unsigned long timeout;
10180cb90f07STony Lindgren
10190cb90f07STony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCC1, &ccc1);
10200cb90f07STony Lindgren if (error)
10210cb90f07STony Lindgren return error;
10220cb90f07STony Lindgren
10230cb90f07STony Lindgren timeout = jiffies + msecs_to_jiffies(6000);
10240cb90f07STony Lindgren
10250cb90f07STony Lindgren /* Start calibration */
10260cb90f07STony Lindgren error = regmap_update_bits(ddata->reg, CPCAP_REG_CCC1,
10270cb90f07STony Lindgren 0xffff,
10280cb90f07STony Lindgren CPCAP_REG_CCC1_CAL_EN);
10290cb90f07STony Lindgren if (error)
10300cb90f07STony Lindgren goto restore;
10310cb90f07STony Lindgren
10320cb90f07STony Lindgren while (time_before(jiffies, timeout)) {
10330cb90f07STony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCC1, &value);
10340cb90f07STony Lindgren if (error)
10350cb90f07STony Lindgren goto restore;
10360cb90f07STony Lindgren
10370cb90f07STony Lindgren if (!(value & CPCAP_REG_CCC1_CAL_EN))
10380cb90f07STony Lindgren break;
10390cb90f07STony Lindgren
10400cb90f07STony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCM, &value);
10410cb90f07STony Lindgren if (error)
10420cb90f07STony Lindgren goto restore;
10430cb90f07STony Lindgren
10440cb90f07STony Lindgren msleep(300);
10450cb90f07STony Lindgren }
10460cb90f07STony Lindgren
10470cb90f07STony Lindgren /* Read calibration offset from CCM */
10480cb90f07STony Lindgren error = regmap_read(ddata->reg, CPCAP_REG_CCM, &value);
10490cb90f07STony Lindgren if (error)
10500cb90f07STony Lindgren goto restore;
10510cb90f07STony Lindgren
10520cb90f07STony Lindgren dev_info(ddata->dev, "calibration done: 0x%04x\n", value);
10530cb90f07STony Lindgren
10540cb90f07STony Lindgren restore:
10550cb90f07STony Lindgren if (error)
10560cb90f07STony Lindgren dev_err(ddata->dev, "%s: error %i\n", __func__, error);
10570cb90f07STony Lindgren
10580cb90f07STony Lindgren error = regmap_update_bits(ddata->reg, CPCAP_REG_CCC1,
10590cb90f07STony Lindgren 0xffff, ccc1);
10600cb90f07STony Lindgren if (error)
10610cb90f07STony Lindgren dev_err(ddata->dev, "%s: restore error %i\n",
10620cb90f07STony Lindgren __func__, error);
10630cb90f07STony Lindgren
10640cb90f07STony Lindgren return error;
10650cb90f07STony Lindgren }
10660cb90f07STony Lindgren
1067874b2adbSTony Lindgren #ifdef CONFIG_OF
1068874b2adbSTony Lindgren static const struct of_device_id cpcap_battery_id_table[] = {
1069874b2adbSTony Lindgren {
1070874b2adbSTony Lindgren .compatible = "motorola,cpcap-battery",
1071874b2adbSTony Lindgren },
1072874b2adbSTony Lindgren {},
1073874b2adbSTony Lindgren };
1074874b2adbSTony Lindgren MODULE_DEVICE_TABLE(of, cpcap_battery_id_table);
1075874b2adbSTony Lindgren #endif
1076874b2adbSTony Lindgren
107751567ad1SSebastian Reichel static const struct power_supply_desc cpcap_charger_battery_desc = {
107851567ad1SSebastian Reichel .name = "battery",
107951567ad1SSebastian Reichel .type = POWER_SUPPLY_TYPE_BATTERY,
108051567ad1SSebastian Reichel .properties = cpcap_battery_props,
108151567ad1SSebastian Reichel .num_properties = ARRAY_SIZE(cpcap_battery_props),
108251567ad1SSebastian Reichel .get_property = cpcap_battery_get_property,
108351567ad1SSebastian Reichel .set_property = cpcap_battery_set_property,
108451567ad1SSebastian Reichel .property_is_writeable = cpcap_battery_property_is_writeable,
108551567ad1SSebastian Reichel .external_power_changed = cpcap_battery_external_power_changed,
108651567ad1SSebastian Reichel };
108751567ad1SSebastian Reichel
cpcap_battery_probe(struct platform_device * pdev)1088874b2adbSTony Lindgren static int cpcap_battery_probe(struct platform_device *pdev)
1089874b2adbSTony Lindgren {
1090874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata;
1091874b2adbSTony Lindgren struct power_supply_config psy_cfg = {};
1092874b2adbSTony Lindgren int error;
1093874b2adbSTony Lindgren
1094874b2adbSTony Lindgren ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
1095874b2adbSTony Lindgren if (!ddata)
1096874b2adbSTony Lindgren return -ENOMEM;
1097874b2adbSTony Lindgren
1098fd46821eSCarl Philipp Klemm cpcap_battery_detect_battery_type(ddata);
1099fd46821eSCarl Philipp Klemm
1100874b2adbSTony Lindgren INIT_LIST_HEAD(&ddata->irq_list);
1101874b2adbSTony Lindgren ddata->dev = &pdev->dev;
1102874b2adbSTony Lindgren
1103874b2adbSTony Lindgren ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
1104874b2adbSTony Lindgren if (!ddata->reg)
1105874b2adbSTony Lindgren return -ENODEV;
1106874b2adbSTony Lindgren
1107874b2adbSTony Lindgren error = cpcap_get_vendor(ddata->dev, ddata->reg, &ddata->vendor);
1108874b2adbSTony Lindgren if (error)
1109874b2adbSTony Lindgren return error;
1110874b2adbSTony Lindgren
1111458f5c8cSTony Lindgren switch (ddata->vendor) {
1112458f5c8cSTony Lindgren case CPCAP_VENDOR_ST:
1113458f5c8cSTony Lindgren ddata->cc_lsb = 95374; /* μAms per LSB */
1114458f5c8cSTony Lindgren break;
1115458f5c8cSTony Lindgren case CPCAP_VENDOR_TI:
1116458f5c8cSTony Lindgren ddata->cc_lsb = 91501; /* μAms per LSB */
1117458f5c8cSTony Lindgren break;
1118458f5c8cSTony Lindgren default:
1119458f5c8cSTony Lindgren return -EINVAL;
1120458f5c8cSTony Lindgren }
1121458f5c8cSTony Lindgren ddata->cc_lsb = (ddata->cc_lsb * ddata->config.cd_factor) / 1000;
1122458f5c8cSTony Lindgren
1123874b2adbSTony Lindgren platform_set_drvdata(pdev, ddata);
1124874b2adbSTony Lindgren
1125874b2adbSTony Lindgren error = cpcap_battery_init_interrupts(pdev, ddata);
1126874b2adbSTony Lindgren if (error)
1127874b2adbSTony Lindgren return error;
1128874b2adbSTony Lindgren
1129874b2adbSTony Lindgren error = cpcap_battery_init_iio(ddata);
1130874b2adbSTony Lindgren if (error)
1131874b2adbSTony Lindgren return error;
1132874b2adbSTony Lindgren
1133874b2adbSTony Lindgren psy_cfg.of_node = pdev->dev.of_node;
1134874b2adbSTony Lindgren psy_cfg.drv_data = ddata;
1135874b2adbSTony Lindgren
113651567ad1SSebastian Reichel ddata->psy = devm_power_supply_register(ddata->dev,
113751567ad1SSebastian Reichel &cpcap_charger_battery_desc,
1138874b2adbSTony Lindgren &psy_cfg);
1139874b2adbSTony Lindgren error = PTR_ERR_OR_ZERO(ddata->psy);
1140874b2adbSTony Lindgren if (error) {
1141874b2adbSTony Lindgren dev_err(ddata->dev, "failed to register power supply\n");
1142874b2adbSTony Lindgren return error;
1143874b2adbSTony Lindgren }
1144874b2adbSTony Lindgren
1145874b2adbSTony Lindgren atomic_set(&ddata->active, 1);
1146874b2adbSTony Lindgren
11470cb90f07STony Lindgren error = cpcap_battery_calibrate(ddata);
11480cb90f07STony Lindgren if (error)
11490cb90f07STony Lindgren return error;
11500cb90f07STony Lindgren
1151874b2adbSTony Lindgren return 0;
1152874b2adbSTony Lindgren }
1153874b2adbSTony Lindgren
cpcap_battery_remove(struct platform_device * pdev)1154874b2adbSTony Lindgren static int cpcap_battery_remove(struct platform_device *pdev)
1155874b2adbSTony Lindgren {
1156874b2adbSTony Lindgren struct cpcap_battery_ddata *ddata = platform_get_drvdata(pdev);
1157874b2adbSTony Lindgren int error;
1158874b2adbSTony Lindgren
1159874b2adbSTony Lindgren atomic_set(&ddata->active, 0);
1160874b2adbSTony Lindgren error = regmap_update_bits(ddata->reg, CPCAP_REG_BPEOL,
1161874b2adbSTony Lindgren 0xffff, 0);
1162874b2adbSTony Lindgren if (error)
1163874b2adbSTony Lindgren dev_err(&pdev->dev, "could not disable: %i\n", error);
1164874b2adbSTony Lindgren
1165874b2adbSTony Lindgren return 0;
1166874b2adbSTony Lindgren }
1167874b2adbSTony Lindgren
1168874b2adbSTony Lindgren static struct platform_driver cpcap_battery_driver = {
1169874b2adbSTony Lindgren .driver = {
1170874b2adbSTony Lindgren .name = "cpcap_battery",
1171874b2adbSTony Lindgren .of_match_table = of_match_ptr(cpcap_battery_id_table),
1172874b2adbSTony Lindgren },
1173874b2adbSTony Lindgren .probe = cpcap_battery_probe,
1174874b2adbSTony Lindgren .remove = cpcap_battery_remove,
1175874b2adbSTony Lindgren };
1176874b2adbSTony Lindgren module_platform_driver(cpcap_battery_driver);
1177874b2adbSTony Lindgren
1178874b2adbSTony Lindgren MODULE_LICENSE("GPL v2");
1179874b2adbSTony Lindgren MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
1180874b2adbSTony Lindgren MODULE_DESCRIPTION("CPCAP PMIC Battery Driver");
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