| /* |
| * Driver for the TI bq24190 battery charger. |
| * |
| * Author: Mark A. Greer <mgreer@animalcreek.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/power_supply.h> |
| #include <linux/gpio.h> |
| #include <linux/i2c.h> |
| |
| #include <linux/power/bq24190_charger.h> |
| |
| |
| #define BQ24190_MANUFACTURER "Texas Instruments" |
| |
| #define BQ24190_REG_ISC 0x00 /* Input Source Control */ |
| #define BQ24190_REG_ISC_EN_HIZ_MASK BIT(7) |
| #define BQ24190_REG_ISC_EN_HIZ_SHIFT 7 |
| #define BQ24190_REG_ISC_VINDPM_MASK (BIT(6) | BIT(5) | BIT(4) | \ |
| BIT(3)) |
| #define BQ24190_REG_ISC_VINDPM_SHIFT 3 |
| #define BQ24190_REG_ISC_IINLIM_MASK (BIT(2) | BIT(1) | BIT(0)) |
| #define BQ24190_REG_ISC_IINLIM_SHIFT 0 |
| |
| #define BQ24190_REG_POC 0x01 /* Power-On Configuration */ |
| #define BQ24190_REG_POC_RESET_MASK BIT(7) |
| #define BQ24190_REG_POC_RESET_SHIFT 7 |
| #define BQ24190_REG_POC_WDT_RESET_MASK BIT(6) |
| #define BQ24190_REG_POC_WDT_RESET_SHIFT 6 |
| #define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4)) |
| #define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4 |
| #define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1)) |
| #define BQ24190_REG_POC_SYS_MIN_SHIFT 1 |
| #define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0) |
| #define BQ24190_REG_POC_BOOST_LIM_SHIFT 0 |
| |
| #define BQ24190_REG_CCC 0x02 /* Charge Current Control */ |
| #define BQ24190_REG_CCC_ICHG_MASK (BIT(7) | BIT(6) | BIT(5) | \ |
| BIT(4) | BIT(3) | BIT(2)) |
| #define BQ24190_REG_CCC_ICHG_SHIFT 2 |
| #define BQ24190_REG_CCC_FORCE_20PCT_MASK BIT(0) |
| #define BQ24190_REG_CCC_FORCE_20PCT_SHIFT 0 |
| |
| #define BQ24190_REG_PCTCC 0x03 /* Pre-charge/Termination Current Cntl */ |
| #define BQ24190_REG_PCTCC_IPRECHG_MASK (BIT(7) | BIT(6) | BIT(5) | \ |
| BIT(4)) |
| #define BQ24190_REG_PCTCC_IPRECHG_SHIFT 4 |
| #define BQ24190_REG_PCTCC_ITERM_MASK (BIT(3) | BIT(2) | BIT(1) | \ |
| BIT(0)) |
| #define BQ24190_REG_PCTCC_ITERM_SHIFT 0 |
| |
| #define BQ24190_REG_CVC 0x04 /* Charge Voltage Control */ |
| #define BQ24190_REG_CVC_VREG_MASK (BIT(7) | BIT(6) | BIT(5) | \ |
| BIT(4) | BIT(3) | BIT(2)) |
| #define BQ24190_REG_CVC_VREG_SHIFT 2 |
| #define BQ24190_REG_CVC_BATLOWV_MASK BIT(1) |
| #define BQ24190_REG_CVC_BATLOWV_SHIFT 1 |
| #define BQ24190_REG_CVC_VRECHG_MASK BIT(0) |
| #define BQ24190_REG_CVC_VRECHG_SHIFT 0 |
| |
| #define BQ24190_REG_CTTC 0x05 /* Charge Term/Timer Control */ |
| #define BQ24190_REG_CTTC_EN_TERM_MASK BIT(7) |
| #define BQ24190_REG_CTTC_EN_TERM_SHIFT 7 |
| #define BQ24190_REG_CTTC_TERM_STAT_MASK BIT(6) |
| #define BQ24190_REG_CTTC_TERM_STAT_SHIFT 6 |
| #define BQ24190_REG_CTTC_WATCHDOG_MASK (BIT(5) | BIT(4)) |
| #define BQ24190_REG_CTTC_WATCHDOG_SHIFT 4 |
| #define BQ24190_REG_CTTC_EN_TIMER_MASK BIT(3) |
| #define BQ24190_REG_CTTC_EN_TIMER_SHIFT 3 |
| #define BQ24190_REG_CTTC_CHG_TIMER_MASK (BIT(2) | BIT(1)) |
| #define BQ24190_REG_CTTC_CHG_TIMER_SHIFT 1 |
| #define BQ24190_REG_CTTC_JEITA_ISET_MASK BIT(0) |
| #define BQ24190_REG_CTTC_JEITA_ISET_SHIFT 0 |
| |
| #define BQ24190_REG_ICTRC 0x06 /* IR Comp/Thermal Regulation Control */ |
| #define BQ24190_REG_ICTRC_BAT_COMP_MASK (BIT(7) | BIT(6) | BIT(5)) |
| #define BQ24190_REG_ICTRC_BAT_COMP_SHIFT 5 |
| #define BQ24190_REG_ICTRC_VCLAMP_MASK (BIT(4) | BIT(3) | BIT(2)) |
| #define BQ24190_REG_ICTRC_VCLAMP_SHIFT 2 |
| #define BQ24190_REG_ICTRC_TREG_MASK (BIT(1) | BIT(0)) |
| #define BQ24190_REG_ICTRC_TREG_SHIFT 0 |
| |
| #define BQ24190_REG_MOC 0x07 /* Misc. Operation Control */ |
| #define BQ24190_REG_MOC_DPDM_EN_MASK BIT(7) |
| #define BQ24190_REG_MOC_DPDM_EN_SHIFT 7 |
| #define BQ24190_REG_MOC_TMR2X_EN_MASK BIT(6) |
| #define BQ24190_REG_MOC_TMR2X_EN_SHIFT 6 |
| #define BQ24190_REG_MOC_BATFET_DISABLE_MASK BIT(5) |
| #define BQ24190_REG_MOC_BATFET_DISABLE_SHIFT 5 |
| #define BQ24190_REG_MOC_JEITA_VSET_MASK BIT(4) |
| #define BQ24190_REG_MOC_JEITA_VSET_SHIFT 4 |
| #define BQ24190_REG_MOC_INT_MASK_MASK (BIT(1) | BIT(0)) |
| #define BQ24190_REG_MOC_INT_MASK_SHIFT 0 |
| |
| #define BQ24190_REG_SS 0x08 /* System Status */ |
| #define BQ24190_REG_SS_VBUS_STAT_MASK (BIT(7) | BIT(6)) |
| #define BQ24190_REG_SS_VBUS_STAT_SHIFT 6 |
| #define BQ24190_REG_SS_CHRG_STAT_MASK (BIT(5) | BIT(4)) |
| #define BQ24190_REG_SS_CHRG_STAT_SHIFT 4 |
| #define BQ24190_REG_SS_DPM_STAT_MASK BIT(3) |
| #define BQ24190_REG_SS_DPM_STAT_SHIFT 3 |
| #define BQ24190_REG_SS_PG_STAT_MASK BIT(2) |
| #define BQ24190_REG_SS_PG_STAT_SHIFT 2 |
| #define BQ24190_REG_SS_THERM_STAT_MASK BIT(1) |
| #define BQ24190_REG_SS_THERM_STAT_SHIFT 1 |
| #define BQ24190_REG_SS_VSYS_STAT_MASK BIT(0) |
| #define BQ24190_REG_SS_VSYS_STAT_SHIFT 0 |
| |
| #define BQ24190_REG_F 0x09 /* Fault */ |
| #define BQ24190_REG_F_WATCHDOG_FAULT_MASK BIT(7) |
| #define BQ24190_REG_F_WATCHDOG_FAULT_SHIFT 7 |
| #define BQ24190_REG_F_BOOST_FAULT_MASK BIT(6) |
| #define BQ24190_REG_F_BOOST_FAULT_SHIFT 6 |
| #define BQ24190_REG_F_CHRG_FAULT_MASK (BIT(5) | BIT(4)) |
| #define BQ24190_REG_F_CHRG_FAULT_SHIFT 4 |
| #define BQ24190_REG_F_BAT_FAULT_MASK BIT(3) |
| #define BQ24190_REG_F_BAT_FAULT_SHIFT 3 |
| #define BQ24190_REG_F_NTC_FAULT_MASK (BIT(2) | BIT(1) | BIT(0)) |
| #define BQ24190_REG_F_NTC_FAULT_SHIFT 0 |
| |
| #define BQ24190_REG_VPRS 0x0A /* Vendor/Part/Revision Status */ |
| #define BQ24190_REG_VPRS_PN_MASK (BIT(5) | BIT(4) | BIT(3)) |
| #define BQ24190_REG_VPRS_PN_SHIFT 3 |
| #define BQ24190_REG_VPRS_PN_24190 0x4 |
| #define BQ24190_REG_VPRS_PN_24192 0x5 /* Also 24193 */ |
| #define BQ24190_REG_VPRS_PN_24192I 0x3 |
| #define BQ24190_REG_VPRS_TS_PROFILE_MASK BIT(2) |
| #define BQ24190_REG_VPRS_TS_PROFILE_SHIFT 2 |
| #define BQ24190_REG_VPRS_DEV_REG_MASK (BIT(1) | BIT(0)) |
| #define BQ24190_REG_VPRS_DEV_REG_SHIFT 0 |
| |
| /* |
| * The FAULT register is latched by the bq24190 (except for NTC_FAULT) |
| * so the first read after a fault returns the latched value and subsequent |
| * reads return the current value. In order to return the fault status |
| * to the user, have the interrupt handler save the reg's value and retrieve |
| * it in the appropriate health/status routine. Each routine has its own |
| * flag indicating whether it should use the value stored by the last run |
| * of the interrupt handler or do an actual reg read. That way each routine |
| * can report back whatever fault may have occured. |
| */ |
| struct bq24190_dev_info { |
| struct i2c_client *client; |
| struct device *dev; |
| struct power_supply charger; |
| struct power_supply battery; |
| char model_name[I2C_NAME_SIZE]; |
| kernel_ulong_t model; |
| unsigned int gpio_int; |
| unsigned int irq; |
| struct mutex f_reg_lock; |
| bool first_time; |
| bool charger_health_valid; |
| bool battery_health_valid; |
| bool battery_status_valid; |
| u8 f_reg; |
| u8 ss_reg; |
| u8 watchdog; |
| }; |
| |
| /* |
| * The tables below provide a 2-way mapping for the value that goes in |
| * the register field and the real-world value that it represents. |
| * The index of the array is the value that goes in the register; the |
| * number at that index in the array is the real-world value that it |
| * represents. |
| */ |
| /* REG02[7:2] (ICHG) in uAh */ |
| static const int bq24190_ccc_ichg_values[] = { |
| 512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000, |
| 1024000, 1088000, 1152000, 1216000, 1280000, 1344000, 1408000, 1472000, |
| 1536000, 1600000, 1664000, 1728000, 1792000, 1856000, 1920000, 1984000, |
| 2048000, 2112000, 2176000, 2240000, 2304000, 2368000, 2432000, 2496000, |
| 2560000, 2624000, 2688000, 2752000, 2816000, 2880000, 2944000, 3008000, |
| 3072000, 3136000, 3200000, 3264000, 3328000, 3392000, 3456000, 3520000, |
| 3584000, 3648000, 3712000, 3776000, 3840000, 3904000, 3968000, 4032000, |
| 4096000, 4160000, 4224000, 4288000, 4352000, 4416000, 4480000, 4544000 |
| }; |
| |
| /* REG04[7:2] (VREG) in uV */ |
| static const int bq24190_cvc_vreg_values[] = { |
| 3504000, 3520000, 3536000, 3552000, 3568000, 3584000, 3600000, 3616000, |
| 3632000, 3648000, 3664000, 3680000, 3696000, 3712000, 3728000, 3744000, |
| 3760000, 3776000, 3792000, 3808000, 3824000, 3840000, 3856000, 3872000, |
| 3888000, 3904000, 3920000, 3936000, 3952000, 3968000, 3984000, 4000000, |
| 4016000, 4032000, 4048000, 4064000, 4080000, 4096000, 4112000, 4128000, |
| 4144000, 4160000, 4176000, 4192000, 4208000, 4224000, 4240000, 4256000, |
| 4272000, 4288000, 4304000, 4320000, 4336000, 4352000, 4368000, 4384000, |
| 4400000 |
| }; |
| |
| /* REG06[1:0] (TREG) in tenths of degrees Celcius */ |
| static const int bq24190_ictrc_treg_values[] = { |
| 600, 800, 1000, 1200 |
| }; |
| |
| /* |
| * Return the index in 'tbl' of greatest value that is less than or equal to |
| * 'val'. The index range returned is 0 to 'tbl_size' - 1. Assumes that |
| * the values in 'tbl' are sorted from smallest to largest and 'tbl_size' |
| * is less than 2^8. |
| */ |
| static u8 bq24190_find_idx(const int tbl[], int tbl_size, int v) |
| { |
| int i; |
| |
| for (i = 1; i < tbl_size; i++) |
| if (v < tbl[i]) |
| break; |
| |
| return i - 1; |
| } |
| |
| /* Basic driver I/O routines */ |
| |
| static int bq24190_read(struct bq24190_dev_info *bdi, u8 reg, u8 *data) |
| { |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(bdi->client, reg); |
| if (ret < 0) |
| return ret; |
| |
| *data = ret; |
| return 0; |
| } |
| |
| static int bq24190_write(struct bq24190_dev_info *bdi, u8 reg, u8 data) |
| { |
| return i2c_smbus_write_byte_data(bdi->client, reg, data); |
| } |
| |
| static int bq24190_read_mask(struct bq24190_dev_info *bdi, u8 reg, |
| u8 mask, u8 shift, u8 *data) |
| { |
| u8 v; |
| int ret; |
| |
| ret = bq24190_read(bdi, reg, &v); |
| if (ret < 0) |
| return ret; |
| |
| v &= mask; |
| v >>= shift; |
| *data = v; |
| |
| return 0; |
| } |
| |
| static int bq24190_write_mask(struct bq24190_dev_info *bdi, u8 reg, |
| u8 mask, u8 shift, u8 data) |
| { |
| u8 v; |
| int ret; |
| |
| ret = bq24190_read(bdi, reg, &v); |
| if (ret < 0) |
| return ret; |
| |
| v &= ~mask; |
| v |= ((data << shift) & mask); |
| |
| return bq24190_write(bdi, reg, v); |
| } |
| |
| static int bq24190_get_field_val(struct bq24190_dev_info *bdi, |
| u8 reg, u8 mask, u8 shift, |
| const int tbl[], int tbl_size, |
| int *val) |
| { |
| u8 v; |
| int ret; |
| |
| ret = bq24190_read_mask(bdi, reg, mask, shift, &v); |
| if (ret < 0) |
| return ret; |
| |
| v = (v >= tbl_size) ? (tbl_size - 1) : v; |
| *val = tbl[v]; |
| |
| return 0; |
| } |
| |
| static int bq24190_set_field_val(struct bq24190_dev_info *bdi, |
| u8 reg, u8 mask, u8 shift, |
| const int tbl[], int tbl_size, |
| int val) |
| { |
| u8 idx; |
| |
| idx = bq24190_find_idx(tbl, tbl_size, val); |
| |
| return bq24190_write_mask(bdi, reg, mask, shift, idx); |
| } |
| |
| #ifdef CONFIG_SYSFS |
| /* |
| * There are a numerous options that are configurable on the bq24190 |
| * that go well beyond what the power_supply properties provide access to. |
| * Provide sysfs access to them so they can be examined and possibly modified |
| * on the fly. They will be provided for the charger power_supply object only |
| * and will be prefixed by 'f_' to make them easier to recognize. |
| */ |
| |
| #define BQ24190_SYSFS_FIELD(_name, r, f, m, store) \ |
| { \ |
| .attr = __ATTR(f_##_name, m, bq24190_sysfs_show, store), \ |
| .reg = BQ24190_REG_##r, \ |
| .mask = BQ24190_REG_##r##_##f##_MASK, \ |
| .shift = BQ24190_REG_##r##_##f##_SHIFT, \ |
| } |
| |
| #define BQ24190_SYSFS_FIELD_RW(_name, r, f) \ |
| BQ24190_SYSFS_FIELD(_name, r, f, S_IWUSR | S_IRUGO, \ |
| bq24190_sysfs_store) |
| |
| #define BQ24190_SYSFS_FIELD_RO(_name, r, f) \ |
| BQ24190_SYSFS_FIELD(_name, r, f, S_IRUGO, NULL) |
| |
| static ssize_t bq24190_sysfs_show(struct device *dev, |
| struct device_attribute *attr, char *buf); |
| static ssize_t bq24190_sysfs_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count); |
| |
| struct bq24190_sysfs_field_info { |
| struct device_attribute attr; |
| u8 reg; |
| u8 mask; |
| u8 shift; |
| }; |
| |
| /* On i386 ptrace-abi.h defines SS that breaks the macro calls below. */ |
| #undef SS |
| |
| static struct bq24190_sysfs_field_info bq24190_sysfs_field_tbl[] = { |
| /* sysfs name reg field in reg */ |
| BQ24190_SYSFS_FIELD_RW(en_hiz, ISC, EN_HIZ), |
| BQ24190_SYSFS_FIELD_RW(vindpm, ISC, VINDPM), |
| BQ24190_SYSFS_FIELD_RW(iinlim, ISC, IINLIM), |
| BQ24190_SYSFS_FIELD_RW(chg_config, POC, CHG_CONFIG), |
| BQ24190_SYSFS_FIELD_RW(sys_min, POC, SYS_MIN), |
| BQ24190_SYSFS_FIELD_RW(boost_lim, POC, BOOST_LIM), |
| BQ24190_SYSFS_FIELD_RW(ichg, CCC, ICHG), |
| BQ24190_SYSFS_FIELD_RW(force_20_pct, CCC, FORCE_20PCT), |
| BQ24190_SYSFS_FIELD_RW(iprechg, PCTCC, IPRECHG), |
| BQ24190_SYSFS_FIELD_RW(iterm, PCTCC, ITERM), |
| BQ24190_SYSFS_FIELD_RW(vreg, CVC, VREG), |
| BQ24190_SYSFS_FIELD_RW(batlowv, CVC, BATLOWV), |
| BQ24190_SYSFS_FIELD_RW(vrechg, CVC, VRECHG), |
| BQ24190_SYSFS_FIELD_RW(en_term, CTTC, EN_TERM), |
| BQ24190_SYSFS_FIELD_RW(term_stat, CTTC, TERM_STAT), |
| BQ24190_SYSFS_FIELD_RO(watchdog, CTTC, WATCHDOG), |
| BQ24190_SYSFS_FIELD_RW(en_timer, CTTC, EN_TIMER), |
| BQ24190_SYSFS_FIELD_RW(chg_timer, CTTC, CHG_TIMER), |
| BQ24190_SYSFS_FIELD_RW(jeta_iset, CTTC, JEITA_ISET), |
| BQ24190_SYSFS_FIELD_RW(bat_comp, ICTRC, BAT_COMP), |
| BQ24190_SYSFS_FIELD_RW(vclamp, ICTRC, VCLAMP), |
| BQ24190_SYSFS_FIELD_RW(treg, ICTRC, TREG), |
| BQ24190_SYSFS_FIELD_RW(dpdm_en, MOC, DPDM_EN), |
| BQ24190_SYSFS_FIELD_RW(tmr2x_en, MOC, TMR2X_EN), |
| BQ24190_SYSFS_FIELD_RW(batfet_disable, MOC, BATFET_DISABLE), |
| BQ24190_SYSFS_FIELD_RW(jeita_vset, MOC, JEITA_VSET), |
| BQ24190_SYSFS_FIELD_RO(int_mask, MOC, INT_MASK), |
| BQ24190_SYSFS_FIELD_RO(vbus_stat, SS, VBUS_STAT), |
| BQ24190_SYSFS_FIELD_RO(chrg_stat, SS, CHRG_STAT), |
| BQ24190_SYSFS_FIELD_RO(dpm_stat, SS, DPM_STAT), |
| BQ24190_SYSFS_FIELD_RO(pg_stat, SS, PG_STAT), |
| BQ24190_SYSFS_FIELD_RO(therm_stat, SS, THERM_STAT), |
| BQ24190_SYSFS_FIELD_RO(vsys_stat, SS, VSYS_STAT), |
| BQ24190_SYSFS_FIELD_RO(watchdog_fault, F, WATCHDOG_FAULT), |
| BQ24190_SYSFS_FIELD_RO(boost_fault, F, BOOST_FAULT), |
| BQ24190_SYSFS_FIELD_RO(chrg_fault, F, CHRG_FAULT), |
| BQ24190_SYSFS_FIELD_RO(bat_fault, F, BAT_FAULT), |
| BQ24190_SYSFS_FIELD_RO(ntc_fault, F, NTC_FAULT), |
| BQ24190_SYSFS_FIELD_RO(pn, VPRS, PN), |
| BQ24190_SYSFS_FIELD_RO(ts_profile, VPRS, TS_PROFILE), |
| BQ24190_SYSFS_FIELD_RO(dev_reg, VPRS, DEV_REG), |
| }; |
| |
| static struct attribute * |
| bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1]; |
| |
| static const struct attribute_group bq24190_sysfs_attr_group = { |
| .attrs = bq24190_sysfs_attrs, |
| }; |
| |
| static void bq24190_sysfs_init_attrs(void) |
| { |
| int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl); |
| |
| for (i = 0; i < limit; i++) |
| bq24190_sysfs_attrs[i] = &bq24190_sysfs_field_tbl[i].attr.attr; |
| |
| bq24190_sysfs_attrs[limit] = NULL; /* Has additional entry for this */ |
| } |
| |
| static struct bq24190_sysfs_field_info *bq24190_sysfs_field_lookup( |
| const char *name) |
| { |
| int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl); |
| |
| for (i = 0; i < limit; i++) |
| if (!strcmp(name, bq24190_sysfs_field_tbl[i].attr.attr.name)) |
| break; |
| |
| if (i >= limit) |
| return NULL; |
| |
| return &bq24190_sysfs_field_tbl[i]; |
| } |
| |
| static ssize_t bq24190_sysfs_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct power_supply *psy = dev_get_drvdata(dev); |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, charger); |
| struct bq24190_sysfs_field_info *info; |
| int ret; |
| u8 v; |
| |
| info = bq24190_sysfs_field_lookup(attr->attr.name); |
| if (!info) |
| return -EINVAL; |
| |
| ret = bq24190_read_mask(bdi, info->reg, info->mask, info->shift, &v); |
| if (ret) |
| return ret; |
| |
| return scnprintf(buf, PAGE_SIZE, "%hhx\n", v); |
| } |
| |
| static ssize_t bq24190_sysfs_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct power_supply *psy = dev_get_drvdata(dev); |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, charger); |
| struct bq24190_sysfs_field_info *info; |
| int ret; |
| u8 v; |
| |
| info = bq24190_sysfs_field_lookup(attr->attr.name); |
| if (!info) |
| return -EINVAL; |
| |
| ret = kstrtou8(buf, 0, &v); |
| if (ret < 0) |
| return ret; |
| |
| ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v); |
| if (ret) |
| return ret; |
| |
| return count; |
| } |
| |
| static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi) |
| { |
| bq24190_sysfs_init_attrs(); |
| |
| return sysfs_create_group(&bdi->charger.dev->kobj, |
| &bq24190_sysfs_attr_group); |
| } |
| |
| static void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) |
| { |
| sysfs_remove_group(&bdi->charger.dev->kobj, &bq24190_sysfs_attr_group); |
| } |
| #else |
| static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi) |
| { |
| return 0; |
| } |
| |
| static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {} |
| #endif |
| |
| /* |
| * According to the "Host Mode and default Mode" section of the |
| * manual, a write to any register causes the bq24190 to switch |
| * from default mode to host mode. It will switch back to default |
| * mode after a WDT timeout unless the WDT is turned off as well. |
| * So, by simply turning off the WDT, we accomplish both with the |
| * same write. |
| */ |
| static int bq24190_set_mode_host(struct bq24190_dev_info *bdi) |
| { |
| int ret; |
| u8 v; |
| |
| ret = bq24190_read(bdi, BQ24190_REG_CTTC, &v); |
| if (ret < 0) |
| return ret; |
| |
| bdi->watchdog = ((v & BQ24190_REG_CTTC_WATCHDOG_MASK) >> |
| BQ24190_REG_CTTC_WATCHDOG_SHIFT); |
| v &= ~BQ24190_REG_CTTC_WATCHDOG_MASK; |
| |
| return bq24190_write(bdi, BQ24190_REG_CTTC, v); |
| } |
| |
| static int bq24190_register_reset(struct bq24190_dev_info *bdi) |
| { |
| int ret, limit = 100; |
| u8 v; |
| |
| /* Reset the registers */ |
| ret = bq24190_write_mask(bdi, BQ24190_REG_POC, |
| BQ24190_REG_POC_RESET_MASK, |
| BQ24190_REG_POC_RESET_SHIFT, |
| 0x1); |
| if (ret < 0) |
| return ret; |
| |
| /* Reset bit will be cleared by hardware so poll until it is */ |
| do { |
| ret = bq24190_read_mask(bdi, BQ24190_REG_POC, |
| BQ24190_REG_POC_RESET_MASK, |
| BQ24190_REG_POC_RESET_SHIFT, |
| &v); |
| if (ret < 0) |
| return ret; |
| |
| if (!v) |
| break; |
| |
| udelay(10); |
| } while (--limit); |
| |
| if (!limit) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| /* Charger power supply property routines */ |
| |
| static int bq24190_charger_get_charge_type(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 v; |
| int type, ret; |
| |
| ret = bq24190_read_mask(bdi, BQ24190_REG_POC, |
| BQ24190_REG_POC_CHG_CONFIG_MASK, |
| BQ24190_REG_POC_CHG_CONFIG_SHIFT, |
| &v); |
| if (ret < 0) |
| return ret; |
| |
| /* If POC[CHG_CONFIG] (REG01[5:4]) == 0, charge is disabled */ |
| if (!v) { |
| type = POWER_SUPPLY_CHARGE_TYPE_NONE; |
| } else { |
| ret = bq24190_read_mask(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_FORCE_20PCT_MASK, |
| BQ24190_REG_CCC_FORCE_20PCT_SHIFT, |
| &v); |
| if (ret < 0) |
| return ret; |
| |
| type = (v) ? POWER_SUPPLY_CHARGE_TYPE_TRICKLE : |
| POWER_SUPPLY_CHARGE_TYPE_FAST; |
| } |
| |
| val->intval = type; |
| |
| return 0; |
| } |
| |
| static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi, |
| const union power_supply_propval *val) |
| { |
| u8 chg_config, force_20pct, en_term; |
| int ret; |
| |
| /* |
| * According to the "Termination when REG02[0] = 1" section of |
| * the bq24190 manual, the trickle charge could be less than the |
| * termination current so it recommends turning off the termination |
| * function. |
| * |
| * Note: AFAICT from the datasheet, the user will have to manually |
| * turn off the charging when in 20% mode. If its not turned off, |
| * there could be battery damage. So, use this mode at your own risk. |
| */ |
| switch (val->intval) { |
| case POWER_SUPPLY_CHARGE_TYPE_NONE: |
| chg_config = 0x0; |
| break; |
| case POWER_SUPPLY_CHARGE_TYPE_TRICKLE: |
| chg_config = 0x1; |
| force_20pct = 0x1; |
| en_term = 0x0; |
| break; |
| case POWER_SUPPLY_CHARGE_TYPE_FAST: |
| chg_config = 0x1; |
| force_20pct = 0x0; |
| en_term = 0x1; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (chg_config) { /* Enabling the charger */ |
| ret = bq24190_write_mask(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_FORCE_20PCT_MASK, |
| BQ24190_REG_CCC_FORCE_20PCT_SHIFT, |
| force_20pct); |
| if (ret < 0) |
| return ret; |
| |
| ret = bq24190_write_mask(bdi, BQ24190_REG_CTTC, |
| BQ24190_REG_CTTC_EN_TERM_MASK, |
| BQ24190_REG_CTTC_EN_TERM_SHIFT, |
| en_term); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return bq24190_write_mask(bdi, BQ24190_REG_POC, |
| BQ24190_REG_POC_CHG_CONFIG_MASK, |
| BQ24190_REG_POC_CHG_CONFIG_SHIFT, chg_config); |
| } |
| |
| static int bq24190_charger_get_health(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 v; |
| int health, ret; |
| |
| mutex_lock(&bdi->f_reg_lock); |
| |
| if (bdi->charger_health_valid) { |
| v = bdi->f_reg; |
| bdi->charger_health_valid = false; |
| mutex_unlock(&bdi->f_reg_lock); |
| } else { |
| mutex_unlock(&bdi->f_reg_lock); |
| |
| ret = bq24190_read(bdi, BQ24190_REG_F, &v); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (v & BQ24190_REG_F_BOOST_FAULT_MASK) { |
| /* |
| * This could be over-current or over-voltage but there's |
| * no way to tell which. Return 'OVERVOLTAGE' since there |
| * isn't an 'OVERCURRENT' value defined that we can return |
| * even if it was over-current. |
| */ |
| health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| } else { |
| v &= BQ24190_REG_F_CHRG_FAULT_MASK; |
| v >>= BQ24190_REG_F_CHRG_FAULT_SHIFT; |
| |
| switch (v) { |
| case 0x0: /* Normal */ |
| health = POWER_SUPPLY_HEALTH_GOOD; |
| break; |
| case 0x1: /* Input Fault (VBUS OVP or VBAT<VBUS<3.8V) */ |
| /* |
| * This could be over-voltage or under-voltage |
| * and there's no way to tell which. Instead |
| * of looking foolish and returning 'OVERVOLTAGE' |
| * when its really under-voltage, just return |
| * 'UNSPEC_FAILURE'. |
| */ |
| health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
| break; |
| case 0x2: /* Thermal Shutdown */ |
| health = POWER_SUPPLY_HEALTH_OVERHEAT; |
| break; |
| case 0x3: /* Charge Safety Timer Expiration */ |
| health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; |
| break; |
| default: |
| health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| } |
| } |
| |
| val->intval = health; |
| |
| return 0; |
| } |
| |
| static int bq24190_charger_get_online(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 v; |
| int ret; |
| |
| ret = bq24190_read_mask(bdi, BQ24190_REG_SS, |
| BQ24190_REG_SS_PG_STAT_MASK, |
| BQ24190_REG_SS_PG_STAT_SHIFT, &v); |
| if (ret < 0) |
| return ret; |
| |
| val->intval = v; |
| return 0; |
| } |
| |
| static int bq24190_charger_get_current(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 v; |
| int curr, ret; |
| |
| ret = bq24190_get_field_val(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT, |
| bq24190_ccc_ichg_values, |
| ARRAY_SIZE(bq24190_ccc_ichg_values), &curr); |
| if (ret < 0) |
| return ret; |
| |
| ret = bq24190_read_mask(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_FORCE_20PCT_MASK, |
| BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v); |
| if (ret < 0) |
| return ret; |
| |
| /* If FORCE_20PCT is enabled, then current is 20% of ICHG value */ |
| if (v) |
| curr /= 5; |
| |
| val->intval = curr; |
| return 0; |
| } |
| |
| static int bq24190_charger_get_current_max(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| int idx = ARRAY_SIZE(bq24190_ccc_ichg_values) - 1; |
| |
| val->intval = bq24190_ccc_ichg_values[idx]; |
| return 0; |
| } |
| |
| static int bq24190_charger_set_current(struct bq24190_dev_info *bdi, |
| const union power_supply_propval *val) |
| { |
| u8 v; |
| int ret, curr = val->intval; |
| |
| ret = bq24190_read_mask(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_FORCE_20PCT_MASK, |
| BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v); |
| if (ret < 0) |
| return ret; |
| |
| /* If FORCE_20PCT is enabled, have to multiply value passed in by 5 */ |
| if (v) |
| curr *= 5; |
| |
| return bq24190_set_field_val(bdi, BQ24190_REG_CCC, |
| BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT, |
| bq24190_ccc_ichg_values, |
| ARRAY_SIZE(bq24190_ccc_ichg_values), curr); |
| } |
| |
| static int bq24190_charger_get_voltage(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| int voltage, ret; |
| |
| ret = bq24190_get_field_val(bdi, BQ24190_REG_CVC, |
| BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT, |
| bq24190_cvc_vreg_values, |
| ARRAY_SIZE(bq24190_cvc_vreg_values), &voltage); |
| if (ret < 0) |
| return ret; |
| |
| val->intval = voltage; |
| return 0; |
| } |
| |
| static int bq24190_charger_get_voltage_max(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| int idx = ARRAY_SIZE(bq24190_cvc_vreg_values) - 1; |
| |
| val->intval = bq24190_cvc_vreg_values[idx]; |
| return 0; |
| } |
| |
| static int bq24190_charger_set_voltage(struct bq24190_dev_info *bdi, |
| const union power_supply_propval *val) |
| { |
| return bq24190_set_field_val(bdi, BQ24190_REG_CVC, |
| BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT, |
| bq24190_cvc_vreg_values, |
| ARRAY_SIZE(bq24190_cvc_vreg_values), val->intval); |
| } |
| |
| static int bq24190_charger_get_property(struct power_supply *psy, |
| enum power_supply_property psp, union power_supply_propval *val) |
| { |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, charger); |
| int ret; |
| |
| dev_dbg(bdi->dev, "prop: %d\n", psp); |
| |
| pm_runtime_get_sync(bdi->dev); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CHARGE_TYPE: |
| ret = bq24190_charger_get_charge_type(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_HEALTH: |
| ret = bq24190_charger_get_health(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_ONLINE: |
| ret = bq24190_charger_get_online(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
| ret = bq24190_charger_get_current(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
| ret = bq24190_charger_get_current_max(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
| ret = bq24190_charger_get_voltage(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
| ret = bq24190_charger_get_voltage_max(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_SCOPE: |
| val->intval = POWER_SUPPLY_SCOPE_SYSTEM; |
| ret = 0; |
| break; |
| case POWER_SUPPLY_PROP_MODEL_NAME: |
| val->strval = bdi->model_name; |
| ret = 0; |
| break; |
| case POWER_SUPPLY_PROP_MANUFACTURER: |
| val->strval = BQ24190_MANUFACTURER; |
| ret = 0; |
| break; |
| default: |
| ret = -ENODATA; |
| } |
| |
| pm_runtime_put_sync(bdi->dev); |
| return ret; |
| } |
| |
| static int bq24190_charger_set_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, charger); |
| int ret; |
| |
| dev_dbg(bdi->dev, "prop: %d\n", psp); |
| |
| pm_runtime_get_sync(bdi->dev); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CHARGE_TYPE: |
| ret = bq24190_charger_set_charge_type(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
| ret = bq24190_charger_set_current(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
| ret = bq24190_charger_set_voltage(bdi, val); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| pm_runtime_put_sync(bdi->dev); |
| return ret; |
| } |
| |
| static int bq24190_charger_property_is_writeable(struct power_supply *psy, |
| enum power_supply_property psp) |
| { |
| int ret; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_CHARGE_TYPE: |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
| ret = 1; |
| break; |
| default: |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static enum power_supply_property bq24190_charger_properties[] = { |
| POWER_SUPPLY_PROP_TYPE, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
| POWER_SUPPLY_PROP_SCOPE, |
| POWER_SUPPLY_PROP_MODEL_NAME, |
| POWER_SUPPLY_PROP_MANUFACTURER, |
| }; |
| |
| static char *bq24190_charger_supplied_to[] = { |
| "main-battery", |
| }; |
| |
| static void bq24190_charger_init(struct power_supply *charger) |
| { |
| charger->name = "bq24190-charger"; |
| charger->type = POWER_SUPPLY_TYPE_USB; |
| charger->properties = bq24190_charger_properties; |
| charger->num_properties = ARRAY_SIZE(bq24190_charger_properties); |
| charger->supplied_to = bq24190_charger_supplied_to; |
| charger->num_supplicants = ARRAY_SIZE(bq24190_charger_supplied_to); |
| charger->get_property = bq24190_charger_get_property; |
| charger->set_property = bq24190_charger_set_property; |
| charger->property_is_writeable = bq24190_charger_property_is_writeable; |
| } |
| |
| /* Battery power supply property routines */ |
| |
| static int bq24190_battery_get_status(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 ss_reg, chrg_fault; |
| int status, ret; |
| |
| mutex_lock(&bdi->f_reg_lock); |
| |
| if (bdi->battery_status_valid) { |
| chrg_fault = bdi->f_reg; |
| bdi->battery_status_valid = false; |
| mutex_unlock(&bdi->f_reg_lock); |
| } else { |
| mutex_unlock(&bdi->f_reg_lock); |
| |
| ret = bq24190_read(bdi, BQ24190_REG_F, &chrg_fault); |
| if (ret < 0) |
| return ret; |
| } |
| |
| chrg_fault &= BQ24190_REG_F_CHRG_FAULT_MASK; |
| chrg_fault >>= BQ24190_REG_F_CHRG_FAULT_SHIFT; |
| |
| ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * The battery must be discharging when any of these are true: |
| * - there is no good power source; |
| * - there is a charge fault. |
| * Could also be discharging when in "supplement mode" but |
| * there is no way to tell when its in that mode. |
| */ |
| if (!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK) || chrg_fault) { |
| status = POWER_SUPPLY_STATUS_DISCHARGING; |
| } else { |
| ss_reg &= BQ24190_REG_SS_CHRG_STAT_MASK; |
| ss_reg >>= BQ24190_REG_SS_CHRG_STAT_SHIFT; |
| |
| switch (ss_reg) { |
| case 0x0: /* Not Charging */ |
| status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| break; |
| case 0x1: /* Pre-charge */ |
| case 0x2: /* Fast Charging */ |
| status = POWER_SUPPLY_STATUS_CHARGING; |
| break; |
| case 0x3: /* Charge Termination Done */ |
| status = POWER_SUPPLY_STATUS_FULL; |
| break; |
| default: |
| ret = -EIO; |
| } |
| } |
| |
| if (!ret) |
| val->intval = status; |
| |
| return ret; |
| } |
| |
| static int bq24190_battery_get_health(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 v; |
| int health, ret; |
| |
| mutex_lock(&bdi->f_reg_lock); |
| |
| if (bdi->battery_health_valid) { |
| v = bdi->f_reg; |
| bdi->battery_health_valid = false; |
| mutex_unlock(&bdi->f_reg_lock); |
| } else { |
| mutex_unlock(&bdi->f_reg_lock); |
| |
| ret = bq24190_read(bdi, BQ24190_REG_F, &v); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (v & BQ24190_REG_F_BAT_FAULT_MASK) { |
| health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| } else { |
| v &= BQ24190_REG_F_NTC_FAULT_MASK; |
| v >>= BQ24190_REG_F_NTC_FAULT_SHIFT; |
| |
| switch (v) { |
| case 0x0: /* Normal */ |
| health = POWER_SUPPLY_HEALTH_GOOD; |
| break; |
| case 0x1: /* TS1 Cold */ |
| case 0x3: /* TS2 Cold */ |
| case 0x5: /* Both Cold */ |
| health = POWER_SUPPLY_HEALTH_COLD; |
| break; |
| case 0x2: /* TS1 Hot */ |
| case 0x4: /* TS2 Hot */ |
| case 0x6: /* Both Hot */ |
| health = POWER_SUPPLY_HEALTH_OVERHEAT; |
| break; |
| default: |
| health = POWER_SUPPLY_HEALTH_UNKNOWN; |
| } |
| } |
| |
| val->intval = health; |
| return 0; |
| } |
| |
| static int bq24190_battery_get_online(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| u8 batfet_disable; |
| int ret; |
| |
| ret = bq24190_read_mask(bdi, BQ24190_REG_MOC, |
| BQ24190_REG_MOC_BATFET_DISABLE_MASK, |
| BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, &batfet_disable); |
| if (ret < 0) |
| return ret; |
| |
| val->intval = !batfet_disable; |
| return 0; |
| } |
| |
| static int bq24190_battery_set_online(struct bq24190_dev_info *bdi, |
| const union power_supply_propval *val) |
| { |
| return bq24190_write_mask(bdi, BQ24190_REG_MOC, |
| BQ24190_REG_MOC_BATFET_DISABLE_MASK, |
| BQ24190_REG_MOC_BATFET_DISABLE_SHIFT, !val->intval); |
| } |
| |
| static int bq24190_battery_get_temp_alert_max(struct bq24190_dev_info *bdi, |
| union power_supply_propval *val) |
| { |
| int temp, ret; |
| |
| ret = bq24190_get_field_val(bdi, BQ24190_REG_ICTRC, |
| BQ24190_REG_ICTRC_TREG_MASK, |
| BQ24190_REG_ICTRC_TREG_SHIFT, |
| bq24190_ictrc_treg_values, |
| ARRAY_SIZE(bq24190_ictrc_treg_values), &temp); |
| if (ret < 0) |
| return ret; |
| |
| val->intval = temp; |
| return 0; |
| } |
| |
| static int bq24190_battery_set_temp_alert_max(struct bq24190_dev_info *bdi, |
| const union power_supply_propval *val) |
| { |
| return bq24190_set_field_val(bdi, BQ24190_REG_ICTRC, |
| BQ24190_REG_ICTRC_TREG_MASK, |
| BQ24190_REG_ICTRC_TREG_SHIFT, |
| bq24190_ictrc_treg_values, |
| ARRAY_SIZE(bq24190_ictrc_treg_values), val->intval); |
| } |
| |
| static int bq24190_battery_get_property(struct power_supply *psy, |
| enum power_supply_property psp, union power_supply_propval *val) |
| { |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, battery); |
| int ret; |
| |
| dev_dbg(bdi->dev, "prop: %d\n", psp); |
| |
| pm_runtime_get_sync(bdi->dev); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| ret = bq24190_battery_get_status(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_HEALTH: |
| ret = bq24190_battery_get_health(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_ONLINE: |
| ret = bq24190_battery_get_online(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| /* Could be Li-on or Li-polymer but no way to tell which */ |
| val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
| ret = 0; |
| break; |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| ret = bq24190_battery_get_temp_alert_max(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_SCOPE: |
| val->intval = POWER_SUPPLY_SCOPE_SYSTEM; |
| ret = 0; |
| break; |
| default: |
| ret = -ENODATA; |
| } |
| |
| pm_runtime_put_sync(bdi->dev); |
| return ret; |
| } |
| |
| static int bq24190_battery_set_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| struct bq24190_dev_info *bdi = |
| container_of(psy, struct bq24190_dev_info, battery); |
| int ret; |
| |
| dev_dbg(bdi->dev, "prop: %d\n", psp); |
| |
| pm_runtime_put_sync(bdi->dev); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| ret = bq24190_battery_set_online(bdi, val); |
| break; |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| ret = bq24190_battery_set_temp_alert_max(bdi, val); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| pm_runtime_put_sync(bdi->dev); |
| return ret; |
| } |
| |
| static int bq24190_battery_property_is_writeable(struct power_supply *psy, |
| enum power_supply_property psp) |
| { |
| int ret; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: |
| ret = 1; |
| break; |
| default: |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static enum power_supply_property bq24190_battery_properties[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_TEMP_ALERT_MAX, |
| POWER_SUPPLY_PROP_SCOPE, |
| }; |
| |
| static void bq24190_battery_init(struct power_supply *battery) |
| { |
| battery->name = "bq24190-battery"; |
| battery->type = POWER_SUPPLY_TYPE_BATTERY; |
| battery->properties = bq24190_battery_properties; |
| battery->num_properties = ARRAY_SIZE(bq24190_battery_properties); |
| battery->get_property = bq24190_battery_get_property; |
| battery->set_property = bq24190_battery_set_property; |
| battery->property_is_writeable = bq24190_battery_property_is_writeable; |
| } |
| |
| static irqreturn_t bq24190_irq_handler_thread(int irq, void *data) |
| { |
| struct bq24190_dev_info *bdi = data; |
| bool alert_userspace = false; |
| u8 ss_reg = 0, f_reg = 0; |
| int ret; |
| |
| pm_runtime_get_sync(bdi->dev); |
| |
| ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg); |
| if (ret < 0) { |
| dev_err(bdi->dev, "Can't read SS reg: %d\n", ret); |
| goto out; |
| } |
| |
| if (ss_reg != bdi->ss_reg) { |
| /* |
| * The device is in host mode so when PG_STAT goes from 1->0 |
| * (i.e., power removed) HIZ needs to be disabled. |
| */ |
| if ((bdi->ss_reg & BQ24190_REG_SS_PG_STAT_MASK) && |
| !(ss_reg & BQ24190_REG_SS_PG_STAT_MASK)) { |
| ret = bq24190_write_mask(bdi, BQ24190_REG_ISC, |
| BQ24190_REG_ISC_EN_HIZ_MASK, |
| BQ24190_REG_ISC_EN_HIZ_SHIFT, |
| 0); |
| if (ret < 0) |
| dev_err(bdi->dev, "Can't access ISC reg: %d\n", |
| ret); |
| } |
| |
| bdi->ss_reg = ss_reg; |
| alert_userspace = true; |
| } |
| |
| mutex_lock(&bdi->f_reg_lock); |
| |
| ret = bq24190_read(bdi, BQ24190_REG_F, &f_reg); |
| if (ret < 0) { |
| mutex_unlock(&bdi->f_reg_lock); |
| dev_err(bdi->dev, "Can't read F reg: %d\n", ret); |
| goto out; |
| } |
| |
| if (f_reg != bdi->f_reg) { |
| bdi->f_reg = f_reg; |
| bdi->charger_health_valid = true; |
| bdi->battery_health_valid = true; |
| bdi->battery_status_valid = true; |
| |
| alert_userspace = true; |
| } |
| |
| mutex_unlock(&bdi->f_reg_lock); |
| |
| /* |
| * Sometimes bq24190 gives a steady trickle of interrupts even |
| * though the watchdog timer is turned off and neither the STATUS |
| * nor FAULT registers have changed. Weed out these sprurious |
| * interrupts so userspace isn't alerted for no reason. |
| * In addition, the chip always generates an interrupt after |
| * register reset so we should ignore that one (the very first |
| * interrupt received). |
| */ |
| if (alert_userspace && !bdi->first_time) { |
| power_supply_changed(&bdi->charger); |
| power_supply_changed(&bdi->battery); |
| bdi->first_time = false; |
| } |
| |
| out: |
| pm_runtime_put_sync(bdi->dev); |
| |
| dev_dbg(bdi->dev, "ss_reg: 0x%02x, f_reg: 0x%02x\n", ss_reg, f_reg); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int bq24190_hw_init(struct bq24190_dev_info *bdi) |
| { |
| u8 v; |
| int ret; |
| |
| pm_runtime_get_sync(bdi->dev); |
| |
| /* First check that the device really is what its supposed to be */ |
| ret = bq24190_read_mask(bdi, BQ24190_REG_VPRS, |
| BQ24190_REG_VPRS_PN_MASK, |
| BQ24190_REG_VPRS_PN_SHIFT, |
| &v); |
| if (ret < 0) |
| goto out; |
| |
| if (v != bdi->model) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| ret = bq24190_register_reset(bdi); |
| if (ret < 0) |
| goto out; |
| |
| ret = bq24190_set_mode_host(bdi); |
| out: |
| pm_runtime_put_sync(bdi->dev); |
| return ret; |
| } |
| |
| #ifdef CONFIG_OF |
| static int bq24190_setup_dt(struct bq24190_dev_info *bdi) |
| { |
| bdi->irq = irq_of_parse_and_map(bdi->dev->of_node, 0); |
| if (bdi->irq <= 0) |
| return -1; |
| |
| return 0; |
| } |
| #else |
| static int bq24190_setup_dt(struct bq24190_dev_info *bdi) |
| { |
| return -1; |
| } |
| #endif |
| |
| static int bq24190_setup_pdata(struct bq24190_dev_info *bdi, |
| struct bq24190_platform_data *pdata) |
| { |
| int ret; |
| |
| if (!gpio_is_valid(pdata->gpio_int)) |
| return -1; |
| |
| ret = gpio_request(pdata->gpio_int, dev_name(bdi->dev)); |
| if (ret < 0) |
| return -1; |
| |
| ret = gpio_direction_input(pdata->gpio_int); |
| if (ret < 0) |
| goto out; |
| |
| bdi->irq = gpio_to_irq(pdata->gpio_int); |
| if (!bdi->irq) |
| goto out; |
| |
| bdi->gpio_int = pdata->gpio_int; |
| return 0; |
| |
| out: |
| gpio_free(pdata->gpio_int); |
| return -1; |
| } |
| |
| static int bq24190_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
| struct device *dev = &client->dev; |
| struct bq24190_platform_data *pdata = client->dev.platform_data; |
| struct bq24190_dev_info *bdi; |
| int ret; |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
| dev_err(dev, "No support for SMBUS_BYTE_DATA\n"); |
| return -ENODEV; |
| } |
| |
| bdi = devm_kzalloc(dev, sizeof(*bdi), GFP_KERNEL); |
| if (!bdi) { |
| dev_err(dev, "Can't alloc bdi struct\n"); |
| return -ENOMEM; |
| } |
| |
| bdi->client = client; |
| bdi->dev = dev; |
| bdi->model = id->driver_data; |
| strncpy(bdi->model_name, id->name, I2C_NAME_SIZE); |
| mutex_init(&bdi->f_reg_lock); |
| bdi->first_time = true; |
| bdi->charger_health_valid = false; |
| bdi->battery_health_valid = false; |
| bdi->battery_status_valid = false; |
| |
| i2c_set_clientdata(client, bdi); |
| |
| if (dev->of_node) |
| ret = bq24190_setup_dt(bdi); |
| else |
| ret = bq24190_setup_pdata(bdi, pdata); |
| |
| if (ret) { |
| dev_err(dev, "Can't get irq info\n"); |
| return -EINVAL; |
| } |
| |
| ret = devm_request_threaded_irq(dev, bdi->irq, NULL, |
| bq24190_irq_handler_thread, |
| IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| "bq24190-charger", bdi); |
| if (ret < 0) { |
| dev_err(dev, "Can't set up irq handler\n"); |
| goto out1; |
| } |
| |
| pm_runtime_enable(dev); |
| pm_runtime_resume(dev); |
| |
| ret = bq24190_hw_init(bdi); |
| if (ret < 0) { |
| dev_err(dev, "Hardware init failed\n"); |
| goto out2; |
| } |
| |
| bq24190_charger_init(&bdi->charger); |
| |
| ret = power_supply_register(dev, &bdi->charger, NULL); |
| if (ret) { |
| dev_err(dev, "Can't register charger\n"); |
| goto out2; |
| } |
| |
| bq24190_battery_init(&bdi->battery); |
| |
| ret = power_supply_register(dev, &bdi->battery, NULL); |
| if (ret) { |
| dev_err(dev, "Can't register battery\n"); |
| goto out3; |
| } |
| |
| ret = bq24190_sysfs_create_group(bdi); |
| if (ret) { |
| dev_err(dev, "Can't create sysfs entries\n"); |
| goto out4; |
| } |
| |
| return 0; |
| |
| out4: |
| power_supply_unregister(&bdi->battery); |
| out3: |
| power_supply_unregister(&bdi->charger); |
| out2: |
| pm_runtime_disable(dev); |
| out1: |
| if (bdi->gpio_int) |
| gpio_free(bdi->gpio_int); |
| |
| return ret; |
| } |
| |
| static int bq24190_remove(struct i2c_client *client) |
| { |
| struct bq24190_dev_info *bdi = i2c_get_clientdata(client); |
| |
| pm_runtime_get_sync(bdi->dev); |
| bq24190_register_reset(bdi); |
| pm_runtime_put_sync(bdi->dev); |
| |
| bq24190_sysfs_remove_group(bdi); |
| power_supply_unregister(&bdi->battery); |
| power_supply_unregister(&bdi->charger); |
| pm_runtime_disable(bdi->dev); |
| |
| if (bdi->gpio_int) |
| gpio_free(bdi->gpio_int); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int bq24190_pm_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct bq24190_dev_info *bdi = i2c_get_clientdata(client); |
| |
| pm_runtime_get_sync(bdi->dev); |
| bq24190_register_reset(bdi); |
| pm_runtime_put_sync(bdi->dev); |
| |
| return 0; |
| } |
| |
| static int bq24190_pm_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct bq24190_dev_info *bdi = i2c_get_clientdata(client); |
| |
| bdi->charger_health_valid = false; |
| bdi->battery_health_valid = false; |
| bdi->battery_status_valid = false; |
| |
| pm_runtime_get_sync(bdi->dev); |
| bq24190_register_reset(bdi); |
| pm_runtime_put_sync(bdi->dev); |
| |
| /* Things may have changed while suspended so alert upper layer */ |
| power_supply_changed(&bdi->charger); |
| power_supply_changed(&bdi->battery); |
| |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(bq24190_pm_ops, bq24190_pm_suspend, bq24190_pm_resume); |
| |
| /* |
| * Only support the bq24190 right now. The bq24192, bq24192i, and bq24193 |
| * are similar but not identical so the driver needs to be extended to |
| * support them. |
| */ |
| static const struct i2c_device_id bq24190_i2c_ids[] = { |
| { "bq24190", BQ24190_REG_VPRS_PN_24190 }, |
| { }, |
| }; |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id bq24190_of_match[] = { |
| { .compatible = "ti,bq24190", }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, bq24190_of_match); |
| #else |
| static const struct of_device_id bq24190_of_match[] = { |
| { }, |
| }; |
| #endif |
| |
| static struct i2c_driver bq24190_driver = { |
| .probe = bq24190_probe, |
| .remove = bq24190_remove, |
| .id_table = bq24190_i2c_ids, |
| .driver = { |
| .name = "bq24190-charger", |
| .owner = THIS_MODULE, |
| .pm = &bq24190_pm_ops, |
| .of_match_table = of_match_ptr(bq24190_of_match), |
| }, |
| }; |
| module_i2c_driver(bq24190_driver); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Mark A. Greer <mgreer@animalcreek.com>"); |
| MODULE_ALIAS("i2c:bq24190-charger"); |
| MODULE_DESCRIPTION("TI BQ24190 Charger Driver"); |