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power_supply: Add support for TI BQ25890 charger chip
More details about the chip can be found here: http://www.ti.com/product/bq25890 Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
parent
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commit
4aeae9cb0d
3 changed files with 1007 additions and 0 deletions
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@ -401,6 +401,13 @@ config CHARGER_BQ24735
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help
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Say Y to enable support for the TI BQ24735 battery charger.
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config CHARGER_BQ25890
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tristate "TI BQ25890 battery charger driver"
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depends on I2C && GPIOLIB
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select REGMAP_I2C
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help
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Say Y to enable support for the TI BQ25890 battery charger.
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config CHARGER_SMB347
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tristate "Summit Microelectronics SMB347 Battery Charger"
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depends on I2C
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@ -60,6 +60,7 @@ obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
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obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
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obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o
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obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o
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obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o
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obj-$(CONFIG_POWER_AVS) += avs/
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obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o
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obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o
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999
drivers/power/bq25890_charger.c
Normal file
999
drivers/power/bq25890_charger.c
Normal file
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@ -0,0 +1,999 @@
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/*
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* TI BQ25890 charger driver
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*
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* Copyright (C) 2015 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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#include <linux/gpio/consumer.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/usb/phy.h>
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#include <linux/acpi.h>
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#include <linux/of.h>
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#define BQ25890_MANUFACTURER "Texas Instruments"
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#define BQ25890_IRQ_PIN "bq25890_irq"
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#define BQ25890_ID 3
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enum bq25890_fields {
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F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
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F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
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F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
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F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
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F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, /* Reg03 */
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F_PUMPX_EN, F_ICHG, /* Reg04 */
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F_IPRECHG, F_ITERM, /* Reg05 */
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F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
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F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
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F_JEITA_ISET, /* Reg07 */
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F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
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F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
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F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
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F_BOOSTV, F_BOOSTI, /* Reg0A */
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F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT, /* Reg0B */
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F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
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F_NTC_FAULT, /* Reg0C */
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F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
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F_THERM_STAT, F_BATV, /* Reg0E */
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F_SYSV, /* Reg0F */
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F_TSPCT, /* Reg10 */
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F_VBUS_GD, F_VBUSV, /* Reg11 */
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F_ICHGR, /* Reg12 */
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F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
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F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
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F_MAX_FIELDS
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};
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/* initial field values, converted to register values */
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struct bq25890_init_data {
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u8 ichg; /* charge current */
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u8 vreg; /* regulation voltage */
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u8 iterm; /* termination current */
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u8 iprechg; /* precharge current */
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u8 sysvmin; /* minimum system voltage limit */
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u8 boostv; /* boost regulation voltage */
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u8 boosti; /* boost current limit */
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u8 boostf; /* boost frequency */
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u8 ilim_en; /* enable ILIM pin */
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u8 treg; /* thermal regulation threshold */
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};
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struct bq25890_state {
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u8 online;
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u8 chrg_status;
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u8 chrg_fault;
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u8 vsys_status;
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u8 boost_fault;
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u8 bat_fault;
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};
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struct bq25890_device {
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struct i2c_client *client;
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struct device *dev;
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struct power_supply *charger;
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struct usb_phy *usb_phy;
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struct notifier_block usb_nb;
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struct work_struct usb_work;
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unsigned long usb_event;
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struct regmap *rmap;
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struct regmap_field *rmap_fields[F_MAX_FIELDS];
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u8 chip_id;
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struct bq25890_init_data init_data;
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struct bq25890_state state;
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struct mutex lock; /* protect state data */
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};
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static const struct regmap_range bq25890_readonly_reg_ranges[] = {
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regmap_reg_range(0x0b, 0x0c),
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regmap_reg_range(0x0e, 0x13),
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};
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static const struct regmap_access_table bq25890_writeable_regs = {
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.no_ranges = bq25890_readonly_reg_ranges,
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.n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
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};
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static const struct regmap_range bq25890_volatile_reg_ranges[] = {
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regmap_reg_range(0x00, 0x00),
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regmap_reg_range(0x09, 0x09),
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regmap_reg_range(0x0b, 0x0c),
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regmap_reg_range(0x0e, 0x14),
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};
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static const struct regmap_access_table bq25890_volatile_regs = {
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.yes_ranges = bq25890_volatile_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
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};
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static const struct regmap_config bq25890_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0x14,
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.cache_type = REGCACHE_RBTREE,
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.wr_table = &bq25890_writeable_regs,
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.volatile_table = &bq25890_volatile_regs,
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};
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static const struct reg_field bq25890_reg_fields[] = {
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/* REG00 */
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[F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
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[F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
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[F_IILIM] = REG_FIELD(0x00, 0, 5),
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/* REG01 */
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[F_BHOT] = REG_FIELD(0x01, 6, 7),
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[F_BCOLD] = REG_FIELD(0x01, 5, 5),
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[F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
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/* REG02 */
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[F_CONV_START] = REG_FIELD(0x02, 7, 7),
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[F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
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[F_BOOSTF] = REG_FIELD(0x02, 5, 5),
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[F_ICO_EN] = REG_FIELD(0x02, 4, 4),
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[F_HVDCP_EN] = REG_FIELD(0x02, 3, 3),
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[F_MAXC_EN] = REG_FIELD(0x02, 2, 2),
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[F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
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[F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
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/* REG03 */
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[F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
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[F_WD_RST] = REG_FIELD(0x03, 6, 6),
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[F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
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[F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
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[F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
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/* REG04 */
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[F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
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[F_ICHG] = REG_FIELD(0x04, 0, 6),
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/* REG05 */
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[F_IPRECHG] = REG_FIELD(0x05, 4, 7),
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[F_ITERM] = REG_FIELD(0x05, 0, 3),
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/* REG06 */
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[F_VREG] = REG_FIELD(0x06, 2, 7),
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[F_BATLOWV] = REG_FIELD(0x06, 1, 1),
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[F_VRECHG] = REG_FIELD(0x06, 0, 0),
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/* REG07 */
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[F_TERM_EN] = REG_FIELD(0x07, 7, 7),
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[F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
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[F_WD] = REG_FIELD(0x07, 4, 5),
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[F_TMR_EN] = REG_FIELD(0x07, 3, 3),
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[F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
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[F_JEITA_ISET] = REG_FIELD(0x07, 0, 0),
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/* REG08 */
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[F_BATCMP] = REG_FIELD(0x08, 6, 7),
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[F_VCLAMP] = REG_FIELD(0x08, 2, 4),
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[F_TREG] = REG_FIELD(0x08, 0, 1),
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/* REG09 */
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[F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
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[F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
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[F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
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[F_JEITA_VSET] = REG_FIELD(0x09, 4, 4),
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[F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
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[F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
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[F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
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[F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
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/* REG0A */
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[F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
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[F_BOOSTI] = REG_FIELD(0x0A, 0, 2),
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/* REG0B */
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[F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
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[F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
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[F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
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[F_SDP_STAT] = REG_FIELD(0x0B, 1, 1),
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[F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
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/* REG0C */
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[F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
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[F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
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[F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
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[F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
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[F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
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/* REG0D */
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[F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
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[F_VINDPM] = REG_FIELD(0x0D, 0, 6),
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/* REG0E */
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[F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
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[F_BATV] = REG_FIELD(0x0E, 0, 6),
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/* REG0F */
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[F_SYSV] = REG_FIELD(0x0F, 0, 6),
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/* REG10 */
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[F_TSPCT] = REG_FIELD(0x10, 0, 6),
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/* REG11 */
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[F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
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[F_VBUSV] = REG_FIELD(0x11, 0, 6),
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/* REG12 */
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[F_ICHGR] = REG_FIELD(0x12, 0, 6),
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/* REG13 */
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[F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
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[F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
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[F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
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/* REG14 */
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[F_REG_RST] = REG_FIELD(0x14, 7, 7),
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[F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
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[F_PN] = REG_FIELD(0x14, 3, 5),
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[F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
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[F_DEV_REV] = REG_FIELD(0x14, 0, 1)
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};
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/*
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* Most of the val -> idx conversions can be computed, given the minimum,
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* maximum and the step between values. For the rest of conversions, we use
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* lookup tables.
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*/
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enum bq25890_table_ids {
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/* range tables */
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TBL_ICHG,
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TBL_ITERM,
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TBL_IPRECHG,
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TBL_VREG,
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TBL_BATCMP,
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TBL_VCLAMP,
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TBL_BOOSTV,
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TBL_SYSVMIN,
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/* lookup tables */
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TBL_TREG,
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TBL_BOOSTI,
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};
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/* Thermal Regulation Threshold lookup table, in degrees Celsius */
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static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
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#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
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/* Boost mode current limit lookup table, in uA */
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static const u32 bq25890_boosti_tbl[] = {
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500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
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};
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#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
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struct bq25890_range {
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u32 min;
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u32 max;
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u32 step;
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};
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struct bq25890_lookup {
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const u32 *tbl;
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u32 size;
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};
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static const union {
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struct bq25890_range rt;
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struct bq25890_lookup lt;
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} bq25890_tables[] = {
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/* range tables */
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[TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
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[TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
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[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
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[TBL_BATCMP] = { .rt = {0, 140, 20} }, /* mOhm */
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[TBL_VCLAMP] = { .rt = {0, 224000, 32000} }, /* uV */
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[TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
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[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
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/* lookup tables */
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[TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
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[TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
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};
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static int bq25890_field_read(struct bq25890_device *bq,
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enum bq25890_fields field_id)
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{
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int ret;
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int val;
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ret = regmap_field_read(bq->rmap_fields[field_id], &val);
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if (ret < 0)
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return ret;
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return val;
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}
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static int bq25890_field_write(struct bq25890_device *bq,
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enum bq25890_fields field_id, u8 val)
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{
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return regmap_field_write(bq->rmap_fields[field_id], val);
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}
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static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
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{
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u8 idx;
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if (id >= TBL_TREG) {
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const u32 *tbl = bq25890_tables[id].lt.tbl;
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u32 tbl_size = bq25890_tables[id].lt.size;
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for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
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;
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} else {
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const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
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u8 rtbl_size;
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rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
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for (idx = 1;
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idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
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idx++)
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;
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}
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return idx - 1;
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}
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static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
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{
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const struct bq25890_range *rtbl;
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/* lookup table? */
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if (id >= TBL_TREG)
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return bq25890_tables[id].lt.tbl[idx];
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/* range table */
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rtbl = &bq25890_tables[id].rt;
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return (rtbl->min + idx * rtbl->step);
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}
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enum bq25890_status {
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STATUS_NOT_CHARGING,
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STATUS_PRE_CHARGING,
|
||||
STATUS_FAST_CHARGING,
|
||||
STATUS_TERMINATION_DONE,
|
||||
};
|
||||
|
||||
enum bq25890_chrg_fault {
|
||||
CHRG_FAULT_NORMAL,
|
||||
CHRG_FAULT_INPUT,
|
||||
CHRG_FAULT_THERMAL_SHUTDOWN,
|
||||
CHRG_FAULT_TIMER_EXPIRED,
|
||||
};
|
||||
|
||||
static int bq25890_power_supply_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
int ret;
|
||||
struct bq25890_device *bq = power_supply_get_drvdata(psy);
|
||||
struct bq25890_state state;
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
state = bq->state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
if (!state.online)
|
||||
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
||||
else if (state.chrg_status == STATUS_NOT_CHARGING)
|
||||
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
else if (state.chrg_status == STATUS_PRE_CHARGING ||
|
||||
state.chrg_status == STATUS_FAST_CHARGING)
|
||||
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
||||
else if (state.chrg_status == STATUS_TERMINATION_DONE)
|
||||
val->intval = POWER_SUPPLY_STATUS_FULL;
|
||||
else
|
||||
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
||||
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_MANUFACTURER:
|
||||
val->strval = BQ25890_MANUFACTURER;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
val->intval = state.online;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_HEALTH:
|
||||
if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
|
||||
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
||||
else if (state.bat_fault)
|
||||
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
||||
else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
|
||||
val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
|
||||
else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
|
||||
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
|
||||
else
|
||||
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* converted_val = ADC_val * 50mA (table 10.3.19) */
|
||||
val->intval = ret * 50000;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
||||
val->intval = bq25890_tables[TBL_ICHG].rt.max;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
if (!state.online) {
|
||||
val->intval = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
ret = bq25890_field_read(bq, F_BATV); /* read measured value */
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
|
||||
val->intval = 2304000 + ret * 20000;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
||||
val->intval = bq25890_tables[TBL_VREG].rt.max;
|
||||
break;
|
||||
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
|
||||
break;
|
||||
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bq25890_get_chip_state(struct bq25890_device *bq,
|
||||
struct bq25890_state *state)
|
||||
{
|
||||
int i, ret;
|
||||
|
||||
struct {
|
||||
enum bq25890_fields id;
|
||||
u8 *data;
|
||||
} state_fields[] = {
|
||||
{F_CHG_STAT, &state->chrg_status},
|
||||
{F_PG_STAT, &state->online},
|
||||
{F_VSYS_STAT, &state->vsys_status},
|
||||
{F_BOOST_FAULT, &state->boost_fault},
|
||||
{F_BAT_FAULT, &state->bat_fault},
|
||||
{F_CHG_FAULT, &state->chrg_fault}
|
||||
};
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
|
||||
ret = bq25890_field_read(bq, state_fields[i].id);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*state_fields[i].data = ret;
|
||||
}
|
||||
|
||||
dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n",
|
||||
state->chrg_status, state->online, state->vsys_status,
|
||||
state->chrg_fault, state->boost_fault, state->bat_fault);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool bq25890_state_changed(struct bq25890_device *bq,
|
||||
struct bq25890_state *new_state)
|
||||
{
|
||||
struct bq25890_state old_state;
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
old_state = bq->state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
return (old_state.chrg_status != new_state->chrg_status ||
|
||||
old_state.chrg_fault != new_state->chrg_fault ||
|
||||
old_state.online != new_state->online ||
|
||||
old_state.bat_fault != new_state->bat_fault ||
|
||||
old_state.boost_fault != new_state->boost_fault ||
|
||||
old_state.vsys_status != new_state->vsys_status);
|
||||
}
|
||||
|
||||
static void bq25890_handle_state_change(struct bq25890_device *bq,
|
||||
struct bq25890_state *new_state)
|
||||
{
|
||||
int ret;
|
||||
struct bq25890_state old_state;
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
old_state = bq->state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
if (!new_state->online) { /* power removed */
|
||||
/* disable ADC */
|
||||
ret = bq25890_field_write(bq, F_CONV_START, 0);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
} else if (!old_state.online) { /* power inserted */
|
||||
/* enable ADC, to have control of charge current/voltage */
|
||||
ret = bq25890_field_write(bq, F_CONV_START, 1);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
error:
|
||||
dev_err(bq->dev, "Error communicating with the chip.\n");
|
||||
}
|
||||
|
||||
static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
|
||||
{
|
||||
struct bq25890_device *bq = private;
|
||||
int ret;
|
||||
struct bq25890_state state;
|
||||
|
||||
ret = bq25890_get_chip_state(bq, &state);
|
||||
if (ret < 0)
|
||||
goto handled;
|
||||
|
||||
if (!bq25890_state_changed(bq, &state))
|
||||
goto handled;
|
||||
|
||||
bq25890_handle_state_change(bq, &state);
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
bq->state = state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
power_supply_changed(bq->charger);
|
||||
|
||||
handled:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int bq25890_chip_reset(struct bq25890_device *bq)
|
||||
{
|
||||
int ret;
|
||||
int rst_check_counter = 10;
|
||||
|
||||
ret = bq25890_field_write(bq, F_REG_RST, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
do {
|
||||
ret = bq25890_field_read(bq, F_REG_RST);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
usleep_range(5, 10);
|
||||
} while (ret == 1 && --rst_check_counter);
|
||||
|
||||
if (!rst_check_counter)
|
||||
return -ETIMEDOUT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bq25890_hw_init(struct bq25890_device *bq)
|
||||
{
|
||||
int ret;
|
||||
int i;
|
||||
struct bq25890_state state;
|
||||
|
||||
const struct {
|
||||
enum bq25890_fields id;
|
||||
u32 value;
|
||||
} init_data[] = {
|
||||
{F_ICHG, bq->init_data.ichg},
|
||||
{F_VREG, bq->init_data.vreg},
|
||||
{F_ITERM, bq->init_data.iterm},
|
||||
{F_IPRECHG, bq->init_data.iprechg},
|
||||
{F_SYSVMIN, bq->init_data.sysvmin},
|
||||
{F_BOOSTV, bq->init_data.boostv},
|
||||
{F_BOOSTI, bq->init_data.boosti},
|
||||
{F_BOOSTF, bq->init_data.boostf},
|
||||
{F_EN_ILIM, bq->init_data.ilim_en},
|
||||
{F_TREG, bq->init_data.treg}
|
||||
};
|
||||
|
||||
ret = bq25890_chip_reset(bq);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* disable watchdog */
|
||||
ret = bq25890_field_write(bq, F_WD, 0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* initialize currents/voltages and other parameters */
|
||||
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
|
||||
ret = bq25890_field_write(bq, init_data[i].id,
|
||||
init_data[i].value);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Configure ADC for continuous conversions. This does not enable it. */
|
||||
ret = bq25890_field_write(bq, F_CONV_RATE, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = bq25890_get_chip_state(bq, &state);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
bq->state = state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum power_supply_property bq25890_power_supply_props[] = {
|
||||
POWER_SUPPLY_PROP_MANUFACTURER,
|
||||
POWER_SUPPLY_PROP_STATUS,
|
||||
POWER_SUPPLY_PROP_ONLINE,
|
||||
POWER_SUPPLY_PROP_HEALTH,
|
||||
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_CHARGE_TERM_CURRENT,
|
||||
};
|
||||
|
||||
static char *bq25890_charger_supplied_to[] = {
|
||||
"main-battery",
|
||||
};
|
||||
|
||||
static const struct power_supply_desc bq25890_power_supply_desc = {
|
||||
.name = "bq25890-charger",
|
||||
.type = POWER_SUPPLY_TYPE_USB,
|
||||
.properties = bq25890_power_supply_props,
|
||||
.num_properties = ARRAY_SIZE(bq25890_power_supply_props),
|
||||
.get_property = bq25890_power_supply_get_property,
|
||||
};
|
||||
|
||||
static int bq25890_power_supply_init(struct bq25890_device *bq)
|
||||
{
|
||||
struct power_supply_config psy_cfg = { .drv_data = bq, };
|
||||
|
||||
psy_cfg.supplied_to = bq25890_charger_supplied_to;
|
||||
psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
|
||||
|
||||
bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
|
||||
&psy_cfg);
|
||||
|
||||
return PTR_ERR_OR_ZERO(bq->charger);
|
||||
}
|
||||
|
||||
static void bq25890_usb_work(struct work_struct *data)
|
||||
{
|
||||
int ret;
|
||||
struct bq25890_device *bq =
|
||||
container_of(data, struct bq25890_device, usb_work);
|
||||
|
||||
switch (bq->usb_event) {
|
||||
case USB_EVENT_ID:
|
||||
/* Enable boost mode */
|
||||
ret = bq25890_field_write(bq, F_OTG_CFG, 1);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
break;
|
||||
|
||||
case USB_EVENT_NONE:
|
||||
/* Disable boost mode */
|
||||
ret = bq25890_field_write(bq, F_OTG_CFG, 0);
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
|
||||
power_supply_changed(bq->charger);
|
||||
break;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
error:
|
||||
dev_err(bq->dev, "Error switching to boost/charger mode.\n");
|
||||
}
|
||||
|
||||
static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
|
||||
void *priv)
|
||||
{
|
||||
struct bq25890_device *bq =
|
||||
container_of(nb, struct bq25890_device, usb_nb);
|
||||
|
||||
bq->usb_event = val;
|
||||
queue_work(system_power_efficient_wq, &bq->usb_work);
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static int bq25890_irq_probe(struct bq25890_device *bq)
|
||||
{
|
||||
int ret;
|
||||
struct gpio_desc *irq;
|
||||
|
||||
irq = devm_gpiod_get_index(bq->dev, BQ25890_IRQ_PIN, 0);
|
||||
if (IS_ERR(irq)) {
|
||||
dev_err(bq->dev, "Could not probe irq pin.\n");
|
||||
return PTR_ERR(irq);
|
||||
}
|
||||
|
||||
ret = gpiod_direction_input(irq);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return gpiod_to_irq(irq);
|
||||
}
|
||||
|
||||
static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
|
||||
{
|
||||
int ret;
|
||||
u32 property;
|
||||
int i;
|
||||
struct bq25890_init_data *init = &bq->init_data;
|
||||
struct {
|
||||
char *name;
|
||||
bool optional;
|
||||
enum bq25890_table_ids tbl_id;
|
||||
u8 *conv_data; /* holds converted value from given property */
|
||||
} props[] = {
|
||||
/* required properties */
|
||||
{"ti,charge-current", false, TBL_ICHG, &init->ichg},
|
||||
{"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
|
||||
{"ti,termination-current", false, TBL_ITERM, &init->iterm},
|
||||
{"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
|
||||
{"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
|
||||
{"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
|
||||
{"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
|
||||
|
||||
/* optional properties */
|
||||
{"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
|
||||
};
|
||||
|
||||
/* initialize data for optional properties */
|
||||
init->treg = 3; /* 120 degrees Celsius */
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(props); i++) {
|
||||
ret = device_property_read_u32(bq->dev, props[i].name,
|
||||
&property);
|
||||
if (ret < 0) {
|
||||
if (props[i].optional)
|
||||
continue;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
*props[i].conv_data = bq25890_find_idx(property,
|
||||
props[i].tbl_id);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bq25890_fw_probe(struct bq25890_device *bq)
|
||||
{
|
||||
int ret;
|
||||
struct bq25890_init_data *init = &bq->init_data;
|
||||
|
||||
ret = bq25890_fw_read_u32_props(bq);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
|
||||
init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bq25890_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 bq25890_device *bq;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
||||
dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
|
||||
if (!bq)
|
||||
return -ENOMEM;
|
||||
|
||||
bq->client = client;
|
||||
bq->dev = dev;
|
||||
|
||||
mutex_init(&bq->lock);
|
||||
|
||||
bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
|
||||
if (IS_ERR(bq->rmap)) {
|
||||
dev_err(dev, "failed to allocate register map\n");
|
||||
return PTR_ERR(bq->rmap);
|
||||
}
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
|
||||
const struct reg_field *reg_fields = bq25890_reg_fields;
|
||||
|
||||
bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
|
||||
reg_fields[i]);
|
||||
if (IS_ERR(bq->rmap_fields[i])) {
|
||||
dev_err(dev, "cannot allocate regmap field\n");
|
||||
return PTR_ERR(bq->rmap_fields[i]);
|
||||
}
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, bq);
|
||||
|
||||
bq->chip_id = bq25890_field_read(bq, F_PN);
|
||||
if (bq->chip_id < 0) {
|
||||
dev_err(dev, "Cannot read chip ID.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (bq->chip_id != BQ25890_ID) {
|
||||
dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (!dev->platform_data) {
|
||||
ret = bq25890_fw_probe(bq);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Cannot read device properties.\n");
|
||||
return ret;
|
||||
}
|
||||
} else {
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ret = bq25890_hw_init(bq);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Cannot initialize the chip.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (client->irq <= 0)
|
||||
client->irq = bq25890_irq_probe(bq);
|
||||
|
||||
if (client->irq < 0) {
|
||||
dev_err(dev, "No irq resource found.\n");
|
||||
return client->irq;
|
||||
}
|
||||
|
||||
/* OTG reporting */
|
||||
bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
|
||||
if (!IS_ERR_OR_NULL(bq->usb_phy)) {
|
||||
INIT_WORK(&bq->usb_work, bq25890_usb_work);
|
||||
bq->usb_nb.notifier_call = bq25890_usb_notifier;
|
||||
usb_register_notifier(bq->usb_phy, &bq->usb_nb);
|
||||
}
|
||||
|
||||
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
||||
bq25890_irq_handler_thread,
|
||||
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
||||
BQ25890_IRQ_PIN, bq);
|
||||
if (ret)
|
||||
goto irq_fail;
|
||||
|
||||
ret = bq25890_power_supply_init(bq);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Failed to register power supply\n");
|
||||
goto irq_fail;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
irq_fail:
|
||||
if (!IS_ERR_OR_NULL(bq->usb_phy))
|
||||
usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int bq25890_remove(struct i2c_client *client)
|
||||
{
|
||||
struct bq25890_device *bq = i2c_get_clientdata(client);
|
||||
|
||||
power_supply_unregister(bq->charger);
|
||||
|
||||
if (!IS_ERR_OR_NULL(bq->usb_phy))
|
||||
usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
|
||||
|
||||
/* reset all registers to default values */
|
||||
bq25890_chip_reset(bq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int bq25890_suspend(struct device *dev)
|
||||
{
|
||||
struct bq25890_device *bq = dev_get_drvdata(dev);
|
||||
|
||||
/*
|
||||
* If charger is removed, while in suspend, make sure ADC is diabled
|
||||
* since it consumes slightly more power.
|
||||
*/
|
||||
return bq25890_field_write(bq, F_CONV_START, 0);
|
||||
}
|
||||
|
||||
static int bq25890_resume(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
struct bq25890_state state;
|
||||
struct bq25890_device *bq = dev_get_drvdata(dev);
|
||||
|
||||
ret = bq25890_get_chip_state(bq, &state);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&bq->lock);
|
||||
bq->state = state;
|
||||
mutex_unlock(&bq->lock);
|
||||
|
||||
/* Re-enable ADC only if charger is plugged in. */
|
||||
if (state.online) {
|
||||
ret = bq25890_field_write(bq, F_CONV_START, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* signal userspace, maybe state changed while suspended */
|
||||
power_supply_changed(bq->charger);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static const struct dev_pm_ops bq25890_pm = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
|
||||
};
|
||||
|
||||
static const struct i2c_device_id bq25890_i2c_ids[] = {
|
||||
{ "bq25890", 0 },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
|
||||
|
||||
static const struct of_device_id bq25890_of_match[] = {
|
||||
{ .compatible = "ti,bq25890", },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, bq25890_of_match);
|
||||
|
||||
static const struct acpi_device_id bq25890_acpi_match[] = {
|
||||
{"BQ258900", 0},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
|
||||
|
||||
static struct i2c_driver bq25890_driver = {
|
||||
.driver = {
|
||||
.name = "bq25890-charger",
|
||||
.of_match_table = of_match_ptr(bq25890_of_match),
|
||||
.acpi_match_table = ACPI_PTR(bq25890_acpi_match),
|
||||
.pm = &bq25890_pm,
|
||||
},
|
||||
.probe = bq25890_probe,
|
||||
.remove = bq25890_remove,
|
||||
.id_table = bq25890_i2c_ids,
|
||||
};
|
||||
module_i2c_driver(bq25890_driver);
|
||||
|
||||
MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
|
||||
MODULE_DESCRIPTION("bq25890 charger driver");
|
||||
MODULE_LICENSE("GPL");
|
Loading…
Reference in a new issue