// SPDX-License-Identifier: GPL-2.0
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/*
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* Chrager driver for Sc89890
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*
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* Copyright (c) 2022 Rockchip Electronics Co., Ltd.
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*
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* Author: Xu Shengfei <xsf@rock-chips.com>
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*/
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/types.h>
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/* Module parameters. */
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static int debug;
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module_param_named(debug, debug, int, 0644);
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MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
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#define DBG(args...) \
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do { \
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if (debug) { \
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pr_info(args); \
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} \
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} while (0)
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#define SC89890_MANUFACTURER "SOUTHCHIP"
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#define SC89890_IRQ "sc89890_irq"
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#define SC89890_ID 4
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#define SC89890_DEBUG_BUF_LEN 30
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enum sc89890_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,
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F_MIN_VBAT_SEL, /* 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_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */
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F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD,
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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 sc89890_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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u8 rbatcomp; /* IBAT sense resistor value */
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u8 vclamp; /* IBAT compensation voltage limit */
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};
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struct sc89890_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 sc89890_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 regulator_dev *otg_vbus_reg;
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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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struct sc89890_init_data init_data;
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struct sc89890_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 sc89890_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 sc89890_writeable_regs = {
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.no_ranges = sc89890_readonly_reg_ranges,
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.n_no_ranges = ARRAY_SIZE(sc89890_readonly_reg_ranges),
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};
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static const struct regmap_range sc89890_volatile_reg_ranges[] = {
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regmap_reg_range(0x00, 0x00),
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regmap_reg_range(0x02, 0x02),
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regmap_reg_range(0x09, 0x09),
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regmap_reg_range(0x0b, 0x0b),
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regmap_reg_range(0x0c, 0x0c),
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regmap_reg_range(0x0d, 0x14),
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};
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static const struct regmap_access_table sc89890_volatile_regs = {
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.yes_ranges = sc89890_volatile_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(sc89890_volatile_reg_ranges),
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};
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static const struct regmap_config sc89890_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 = &sc89890_writeable_regs,
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.volatile_table = &sc89890_volatile_regs,
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};
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static const struct reg_field sc89890_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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[F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0),
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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, 5, 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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[F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3),
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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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enum sc89890_status {
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STATUS_NOT_CHARGING,
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STATUS_PRE_CHARGING,
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STATUS_FAST_CHARGING,
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STATUS_TERMINATION_DONE,
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};
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enum sc89890_chrg_fault {
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CHRG_FAULT_NORMAL,
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CHRG_FAULT_INPUT,
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CHRG_FAULT_THERMAL_SHUTDOWN,
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CHRG_FAULT_TIMER_EXPIRED,
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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 sc89890_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_IILIM,
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TBL_VREG,
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TBL_BOOSTV,
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TBL_SYSVMIN,
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TBL_VBATCOMP,
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TBL_RBATCOMP,
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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 sc89890_treg_tbl[] = { 60, 80, 100, 120 };
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#define SC89890_TREG_TBL_SIZE ARRAY_SIZE(sc89890_treg_tbl)
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/* Boost mode current limit lookup table, in uA */
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static const u32 sc89890_boosti_tbl[] = {
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500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
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};
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#define SC89890_BOOSTI_TBL_SIZE ARRAY_SIZE(sc89890_boosti_tbl)
|
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struct sc89890_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 sc89890_lookup {
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const u32 *tbl;
|
u32 size;
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};
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static const union {
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struct sc89890_range rt;
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struct sc89890_lookup lt;
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} sc89890_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_IILIM] = { .rt = {100000, 3250000, 50000} }, /* uA */
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[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* 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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[TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */
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[TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */
|
|
/* lookup tables */
|
[TBL_TREG] = { .lt = {sc89890_treg_tbl, SC89890_TREG_TBL_SIZE} },
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[TBL_BOOSTI] = { .lt = {sc89890_boosti_tbl, SC89890_BOOSTI_TBL_SIZE} }
|
};
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|
static int sc89890_field_read(struct sc89890_device *sc89890,
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enum sc89890_fields field_id)
|
{
|
int ret;
|
int val;
|
|
ret = regmap_field_read(sc89890->rmap_fields[field_id], &val);
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if (ret < 0)
|
return ret;
|
|
return val;
|
}
|
|
static int sc89890_field_write(struct sc89890_device *sc89890,
|
enum sc89890_fields field_id, u8 val)
|
{
|
return regmap_field_write(sc89890->rmap_fields[field_id], val);
|
}
|
|
static u8 sc89890_find_idx(u32 value, enum sc89890_table_ids id)
|
{
|
u8 idx;
|
|
if (id >= TBL_TREG) {
|
const u32 *tbl = sc89890_tables[id].lt.tbl;
|
u32 tbl_size = sc89890_tables[id].lt.size;
|
|
for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
|
;
|
} else {
|
const struct sc89890_range *rtbl = &sc89890_tables[id].rt;
|
u8 rtbl_size;
|
|
rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
|
|
for (idx = 1;
|
idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
|
idx++)
|
;
|
}
|
|
return idx - 1;
|
}
|
|
static u32 sc89890_find_val(u8 idx, enum sc89890_table_ids id)
|
{
|
const struct sc89890_range *rtbl;
|
|
/* lookup table? */
|
if (id >= TBL_TREG)
|
return sc89890_tables[id].lt.tbl[idx];
|
|
/* range table */
|
rtbl = &sc89890_tables[id].rt;
|
|
return (rtbl->min + idx * rtbl->step);
|
}
|
|
static bool sc89890_is_adc_property(enum power_supply_property psp)
|
{
|
switch (psp) {
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
return true;
|
|
default:
|
return false;
|
}
|
}
|
|
static int sc89890_get_chip_state(struct sc89890_device *sc89890,
|
struct sc89890_state *state)
|
{
|
int i, ret;
|
|
struct {
|
enum sc89890_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 = sc89890_field_read(sc89890, state_fields[i].id);
|
if (ret < 0)
|
return ret;
|
|
*state_fields[i].data = ret;
|
}
|
|
DBG("SC89890: 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 irqreturn_t __sc89890_handle_irq(struct sc89890_device *sc89890)
|
{
|
struct sc89890_state new_state;
|
int ret;
|
|
ret = sc89890_get_chip_state(sc89890, &new_state);
|
if (ret < 0)
|
return IRQ_NONE;
|
|
if (!memcmp(&sc89890->state, &new_state, sizeof(new_state)))
|
return IRQ_NONE;
|
|
if (!new_state.online && sc89890->state.online) { /* power removed */
|
/* disable ADC */
|
ret = sc89890_field_write(sc89890, F_CONV_START, 0);
|
if (ret < 0)
|
goto error;
|
} else if (new_state.online && !sc89890->state.online) { /* power inserted */
|
|
/* enable ADC, to have control of charge current/voltage */
|
ret = sc89890_field_write(sc89890, F_CONV_START, 1);
|
if (ret < 0)
|
goto error;
|
}
|
|
sc89890->state = new_state;
|
power_supply_changed(sc89890->charger);
|
|
return IRQ_HANDLED;
|
error:
|
dev_err(sc89890->dev, "Error communicating with the chip: %pe\n",
|
ERR_PTR(ret));
|
return IRQ_HANDLED;
|
}
|
|
static int sc89890_power_supply_get_property(struct power_supply *psy,
|
enum power_supply_property psp,
|
union power_supply_propval *val)
|
{
|
struct sc89890_device *sc89890 = power_supply_get_drvdata(psy);
|
struct sc89890_state state;
|
bool do_adc_conv;
|
int ret;
|
|
mutex_lock(&sc89890->lock);
|
/* update state in case we lost an interrupt */
|
__sc89890_handle_irq(sc89890);
|
state = sc89890->state;
|
do_adc_conv = !state.online && sc89890_is_adc_property(psp);
|
if (do_adc_conv)
|
sc89890_field_write(sc89890, F_CONV_START, 1);
|
mutex_unlock(&sc89890->lock);
|
|
if (do_adc_conv)
|
regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START],
|
ret, !ret, 25000, 1000000);
|
|
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_CHARGE_TYPE:
|
if (!state.online || state.chrg_status == STATUS_NOT_CHARGING ||
|
state.chrg_status == STATUS_TERMINATION_DONE)
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
else if (state.chrg_status == STATUS_PRE_CHARGING)
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
|
else if (state.chrg_status == STATUS_FAST_CHARGING)
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
|
else /* unreachable */
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
|
break;
|
|
case POWER_SUPPLY_PROP_MANUFACTURER:
|
val->strval = SC89890_MANUFACTURER;
|
break;
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
val->strval = "SC89890";
|
break;
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
val->intval = !!state.chrg_status;
|
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_MAX:
|
val->intval = sc89890_find_val(sc89890->init_data.ichg, TBL_ICHG);
|
break;
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
if (!state.online) {
|
val->intval = 0;
|
break;
|
}
|
|
ret = sc89890_field_read(sc89890, 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 = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG);
|
break;
|
|
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
val->intval = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM);
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
val->intval = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM);
|
break;
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
ret = sc89890_field_read(sc89890, F_IILIM);
|
if (ret < 0)
|
return ret;
|
|
val->intval = sc89890_find_val(ret, TBL_IILIM);
|
break;
|
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
val->intval = 13500000; /* uV */
|
break;
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
ret = sc89890_field_read(sc89890, F_SYSV); /* 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_CURRENT_NOW:
|
ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */
|
if (ret < 0)
|
return ret;
|
|
/* converted_val = ADC_val * 50mA (table 10.3.19) */
|
val->intval = ret * -50000;
|
break;
|
|
default:
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
static int sc89890_power_supply_set_property(struct power_supply *psy,
|
enum power_supply_property psp,
|
const union power_supply_propval *val)
|
{
|
struct sc89890_device *sc89890 = power_supply_get_drvdata(psy);
|
int index, ret;
|
|
switch (psp) {
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
index = sc89890_find_idx(val->intval, TBL_ICHG);
|
ret = sc89890_field_write(sc89890, F_ICHG, index);
|
if (ret < 0)
|
dev_err(sc89890->dev, "set input voltage limit failed\n");
|
break;
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
index = sc89890_find_idx(val->intval, TBL_IILIM);
|
ret = sc89890_field_write(sc89890, F_IILIM, index);
|
if (ret < 0)
|
dev_err(sc89890->dev, "set input current limit failed\n");
|
break;
|
|
default:
|
ret = -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static irqreturn_t sc89890_irq_handler_thread(int irq, void *private)
|
{
|
struct sc89890_device *sc89890 = private;
|
irqreturn_t ret;
|
|
mutex_lock(&sc89890->lock);
|
ret = __sc89890_handle_irq(sc89890);
|
mutex_unlock(&sc89890->lock);
|
|
return ret;
|
}
|
|
static int sc89890_chip_reset(struct sc89890_device *sc89890)
|
{
|
int ret;
|
int rst_check_counter = 10;
|
|
ret = sc89890_field_write(sc89890, F_REG_RST, 1);
|
if (ret < 0)
|
return ret;
|
|
do {
|
ret = sc89890_field_read(sc89890, 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 sc89890_hw_init(struct sc89890_device *sc89890)
|
{
|
int ret;
|
int i;
|
|
const struct {
|
enum sc89890_fields id;
|
u32 value;
|
} init_data[] = {
|
{F_ICHG, sc89890->init_data.ichg},
|
{F_VREG, sc89890->init_data.vreg},
|
{F_ITERM, sc89890->init_data.iterm},
|
{F_IPRECHG, sc89890->init_data.iprechg},
|
{F_SYSVMIN, sc89890->init_data.sysvmin},
|
{F_BOOSTV, sc89890->init_data.boostv},
|
{F_BOOSTI, sc89890->init_data.boosti},
|
{F_BOOSTF, sc89890->init_data.boostf},
|
{F_EN_ILIM, sc89890->init_data.ilim_en},
|
{F_TREG, sc89890->init_data.treg},
|
{F_BATCMP, sc89890->init_data.rbatcomp},
|
{F_VCLAMP, sc89890->init_data.vclamp},
|
};
|
|
ret = sc89890_chip_reset(sc89890);
|
if (ret < 0) {
|
dev_dbg(sc89890->dev, "Reset failed %d\n", ret);
|
return ret;
|
}
|
|
/* disable watchdog */
|
ret = sc89890_field_write(sc89890, F_WD, 0);
|
if (ret < 0) {
|
dev_dbg(sc89890->dev, "Disabling watchdog failed %d\n", ret);
|
return ret;
|
}
|
|
/* initialize currents/voltages and other parameters */
|
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
|
ret = sc89890_field_write(sc89890, init_data[i].id,
|
init_data[i].value);
|
if (ret < 0) {
|
dev_dbg(sc89890->dev, "Writing init data failed %d\n", ret);
|
return ret;
|
}
|
}
|
|
/* Configure ADC for continuous conversions when charging */
|
ret = sc89890_field_write(sc89890, F_CONV_RATE, !!sc89890->state.online);
|
if (ret < 0) {
|
dev_err(sc89890->dev, "Config ADC failed %d\n", ret);
|
return ret;
|
}
|
|
ret = sc89890_field_write(sc89890, F_AUTO_DPDM_EN, 0);
|
if (ret < 0) {
|
dev_err(sc89890->dev, "Config F_AUTO_DPDM_EN failed %d\n", ret);
|
return ret;
|
}
|
|
ret = sc89890_field_write(sc89890, F_HVDCP_EN, 0);
|
if (ret < 0) {
|
dev_err(sc89890->dev, "Config F_HVDCP_EN failed %d\n", ret);
|
return ret;
|
}
|
|
ret = sc89890_get_chip_state(sc89890, &sc89890->state);
|
if (ret < 0) {
|
dev_err(sc89890->dev, "Get state failed %d\n", ret);
|
return ret;
|
}
|
|
return 0;
|
}
|
|
static const enum power_supply_property sc89890_power_supply_props[] = {
|
POWER_SUPPLY_PROP_MANUFACTURER,
|
POWER_SUPPLY_PROP_MODEL_NAME,
|
POWER_SUPPLY_PROP_STATUS,
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
POWER_SUPPLY_PROP_ONLINE,
|
POWER_SUPPLY_PROP_HEALTH,
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
|
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
|
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
|
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
};
|
|
static char *sc89890_charger_supplied_to[] = {
|
"usb",
|
};
|
|
static const struct power_supply_desc sc89890_power_supply_desc = {
|
.name = "sc89890-charger",
|
.type = POWER_SUPPLY_TYPE_USB,
|
.properties = sc89890_power_supply_props,
|
.num_properties = ARRAY_SIZE(sc89890_power_supply_props),
|
.set_property = sc89890_power_supply_set_property,
|
.get_property = sc89890_power_supply_get_property,
|
};
|
|
static int sc89890_power_supply_init(struct sc89890_device *sc89890)
|
{
|
struct power_supply_config psy_cfg = { .drv_data = sc89890, };
|
|
psy_cfg.of_node = sc89890->dev->of_node;
|
psy_cfg.supplied_to = sc89890_charger_supplied_to;
|
psy_cfg.num_supplicants = ARRAY_SIZE(sc89890_charger_supplied_to);
|
|
sc89890->charger = devm_power_supply_register(sc89890->dev,
|
&sc89890_power_supply_desc,
|
&psy_cfg);
|
|
if (PTR_ERR_OR_ZERO(sc89890->charger)) {
|
dev_err(sc89890->dev, "failed to register power supply\n");
|
return PTR_ERR(sc89890->charger);
|
}
|
|
return 0;
|
}
|
|
static int sc89890_get_chip_version(struct sc89890_device *sc89890)
|
{
|
int id;
|
|
id = sc89890_field_read(sc89890, F_PN);
|
if (id < 0) {
|
dev_err(sc89890->dev, "Cannot read chip ID.\n");
|
return id;
|
} else if (id != SC89890_ID) {
|
dev_err(sc89890->dev, "Unknown chip ID %d\n", id);
|
return -ENODEV;
|
}
|
|
DBG("charge IC: SC89890\n");
|
|
return 0;
|
}
|
|
static void sc89890_set_otg_vbus(struct sc89890_device *sc, bool enable)
|
{
|
sc89890_field_write(sc, F_OTG_CFG, enable);
|
}
|
|
static int sc89890_otg_vbus_enable(struct regulator_dev *dev)
|
{
|
struct sc89890_device *sc = rdev_get_drvdata(dev);
|
|
sc89890_set_otg_vbus(sc, true);
|
|
return 0;
|
}
|
|
static int sc89890_otg_vbus_disable(struct regulator_dev *dev)
|
{
|
struct sc89890_device *sc = rdev_get_drvdata(dev);
|
|
sc89890_set_otg_vbus(sc, false);
|
|
return 0;
|
}
|
|
static int sc89890_otg_vbus_is_enabled(struct regulator_dev *dev)
|
{
|
struct sc89890_device *sc = rdev_get_drvdata(dev);
|
u8 val;
|
|
val = sc89890_field_read(sc, F_OTG_CFG);
|
|
return val;
|
}
|
|
static const struct regulator_ops sc89890_otg_vbus_ops = {
|
.enable = sc89890_otg_vbus_enable,
|
.disable = sc89890_otg_vbus_disable,
|
.is_enabled = sc89890_otg_vbus_is_enabled,
|
};
|
|
static const struct regulator_desc sc89890_otg_vbus_desc = {
|
.name = "otg-vbus",
|
.of_match = "otg-vbus",
|
.regulators_node = of_match_ptr("regulators"),
|
.owner = THIS_MODULE,
|
.ops = &sc89890_otg_vbus_ops,
|
.type = REGULATOR_VOLTAGE,
|
.fixed_uV = 5000000,
|
.n_voltages = 1,
|
};
|
|
static int sc89890_register_otg_vbus_regulator(struct sc89890_device *sc)
|
{
|
struct regulator_config config = { };
|
struct device_node *np;
|
|
np = of_get_child_by_name(sc->dev->of_node, "regulators");
|
if (!np) {
|
dev_warn(sc->dev, "cannot find regulators node\n");
|
return -ENXIO;
|
}
|
|
config.dev = sc->dev;
|
config.driver_data = sc;
|
|
sc->otg_vbus_reg = devm_regulator_register(sc->dev,
|
&sc89890_otg_vbus_desc,
|
&config);
|
if (IS_ERR(sc->otg_vbus_reg))
|
return PTR_ERR(sc->otg_vbus_reg);
|
|
return 0;
|
}
|
|
static ssize_t registers_show(struct device *dev,
|
struct device_attribute *attr,
|
char *buf)
|
{
|
struct sc89890_device *sc89890 = dev_get_drvdata(dev);
|
u8 tmpbuf[SC89890_DEBUG_BUF_LEN];
|
int idx = 0;
|
u8 addr;
|
int val;
|
int len;
|
int ret;
|
|
sc89890_field_write(sc89890, F_CONV_START, 1);
|
|
regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START],
|
ret, !ret, 25000, 1000000);
|
|
for (addr = 0x0; addr <= 0x14; addr++) {
|
ret = regmap_read(sc89890->rmap, addr, &val);
|
if (ret == 0) {
|
len = snprintf(tmpbuf, SC89890_DEBUG_BUF_LEN,
|
"Reg[%.2X] = 0x%.2x\n", addr, val);
|
memcpy(&buf[idx], tmpbuf, len);
|
idx += len;
|
}
|
}
|
|
val = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG);
|
pr_info("CHARGE_VOLTAGE_MAX: %d\n", val / 1000);
|
|
val = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM);
|
pr_info("PRECHARGE_CURRENT: %d\n", val / 1000);
|
|
val = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM);
|
pr_info("CHARGE_TERM_CURRENT: %d\n", val / 1000);
|
|
ret = sc89890_field_read(sc89890, F_BATV); /* read measured value */
|
if (ret)
|
dev_err(dev, "read F_BAT error!\n");
|
else {
|
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
|
val = 2304000 + ret * 20000;
|
pr_info("charge voltage: %d\n", val / 1000);
|
}
|
|
ret = sc89890_field_read(sc89890, F_IILIM);
|
if (ret)
|
dev_err(dev, "read F_IILIM error!\n");
|
else {
|
val = sc89890_find_val(ret, TBL_IILIM);
|
pr_info("INPUT_CURRENT_LIMIT: %d\n", val / 1000);
|
}
|
ret = sc89890_field_read(sc89890, F_SYSV); /* read measured value */
|
if (ret)
|
dev_err(dev, "read F_SYSV error!\n");
|
else {
|
/* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
|
val = 2304000 + ret * 20000;
|
pr_info("VOLTAGE_NOW: %d\n", val / 1000);
|
}
|
ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */
|
if (ret)
|
dev_err(dev, "read F_ICHRG error!\n");
|
else {
|
/* converted_val = ADC_val * 50mA (table 10.3.19) */
|
val = ret * -50000;
|
pr_info("CURRENT_NOW: %d\n", val / 1000);
|
}
|
return idx;
|
}
|
|
static ssize_t registers_store(struct device *dev,
|
struct device_attribute *attr,
|
const char *buf, size_t count)
|
{
|
struct sc89890_device *sc89890 = dev_get_drvdata(dev);
|
int ret;
|
unsigned int reg;
|
int val;
|
|
ret = sscanf(buf, "%x %x", ®, &val);
|
if (ret == 2 && reg <= 0x14)
|
regmap_write(sc89890->rmap, (unsigned char)reg, val);
|
|
return count;
|
}
|
|
static DEVICE_ATTR_RW(registers);
|
|
static void sc89890_create_device_node(struct device *dev)
|
{
|
device_create_file(dev, &dev_attr_registers);
|
}
|
|
static int sc89890_fw_read_u32_props(struct sc89890_device *sc89890)
|
{
|
struct sc89890_init_data *init = &sc89890->init_data;
|
u32 property;
|
int ret;
|
int i;
|
struct {
|
char *name;
|
bool optional;
|
enum sc89890_table_ids tbl_id;
|
u8 *conv_data; /* holds converted value from given property */
|
} props[] = {
|
/* required properties */
|
{"sc,charge-current", false, TBL_ICHG, &init->ichg},
|
{"sc,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
|
{"sc,termination-current", false, TBL_ITERM, &init->iterm},
|
{"sc,precharge-current", false, TBL_ITERM, &init->iprechg},
|
{"sc,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
|
{"sc,boost-voltage", false, TBL_BOOSTV, &init->boostv},
|
{"sc,boost-max-current", false, TBL_BOOSTI, &init->boosti},
|
|
/* optional properties */
|
{"sc,thermal-regulation-threshold", true, TBL_TREG, &init->treg},
|
{"sc,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp},
|
{"sc,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp},
|
};
|
|
/* initialize data for optional properties */
|
init->treg = 3; /* 120 degrees Celsius */
|
init->rbatcomp = 0;
|
init->vclamp = 0; /* IBAT compensation disabled */
|
|
for (i = 0; i < ARRAY_SIZE(props); i++) {
|
ret = device_property_read_u32(sc89890->dev,
|
props[i].name,
|
&property);
|
if (ret < 0) {
|
if (props[i].optional)
|
continue;
|
|
dev_err(sc89890->dev, "Unable to read property %d %s\n", ret,
|
props[i].name);
|
|
return ret;
|
}
|
|
*props[i].conv_data = sc89890_find_idx(property,
|
props[i].tbl_id);
|
}
|
|
return 0;
|
}
|
|
static int sc89890_fw_probe(struct sc89890_device *sc89890)
|
{
|
int ret;
|
struct sc89890_init_data *init = &sc89890->init_data;
|
|
ret = sc89890_fw_read_u32_props(sc89890);
|
if (ret < 0)
|
return ret;
|
|
init->ilim_en = device_property_read_bool(sc89890->dev, "sc,use-ilim-pin");
|
init->boostf = device_property_read_bool(sc89890->dev, "sc,boost-low-freq");
|
|
return 0;
|
}
|
|
static int sc89890_probe(struct i2c_client *client,
|
const struct i2c_device_id *id)
|
{
|
struct device *dev = &client->dev;
|
struct sc89890_device *sc89890;
|
int ret;
|
int i;
|
|
sc89890 = devm_kzalloc(dev, sizeof(*sc89890), GFP_KERNEL);
|
if (!sc89890)
|
return -ENOMEM;
|
|
sc89890->client = client;
|
sc89890->dev = dev;
|
|
mutex_init(&sc89890->lock);
|
sc89890->rmap = devm_regmap_init_i2c(client, &sc89890_regmap_config);
|
if (IS_ERR(sc89890->rmap)) {
|
dev_err(dev, "failed to allocate register map\n");
|
return PTR_ERR(sc89890->rmap);
|
}
|
|
for (i = 0; i < ARRAY_SIZE(sc89890_reg_fields); i++) {
|
const struct reg_field *reg_fields = sc89890_reg_fields;
|
|
sc89890->rmap_fields[i] = devm_regmap_field_alloc(dev,
|
sc89890->rmap,
|
reg_fields[i]);
|
if (IS_ERR(sc89890->rmap_fields[i])) {
|
dev_err(dev, "cannot allocate regmap field\n");
|
return PTR_ERR(sc89890->rmap_fields[i]);
|
}
|
}
|
|
i2c_set_clientdata(client, sc89890);
|
|
ret = sc89890_get_chip_version(sc89890);
|
if (ret) {
|
dev_err(dev, "Cannot read chip ID or unknown chip.\n");
|
return ret;
|
}
|
|
ret = sc89890_power_supply_init(sc89890);
|
if (ret < 0) {
|
dev_err(dev, "Failed to register power supply\n");
|
goto irq_fail;
|
}
|
|
if (!dev->platform_data) {
|
ret = sc89890_fw_probe(sc89890);
|
if (ret < 0) {
|
dev_err(dev, "Cannot read device properties.\n");
|
return ret;
|
}
|
} else {
|
return -ENODEV;
|
}
|
|
ret = sc89890_hw_init(sc89890);
|
if (ret < 0) {
|
dev_err(dev, "Cannot initialize the chip.\n");
|
return ret;
|
}
|
|
|
if (client->irq < 0) {
|
dev_err(dev, "No irq resource found.\n");
|
return client->irq;
|
}
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
sc89890_irq_handler_thread,
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
SC89890_IRQ, sc89890);
|
if (ret)
|
goto irq_fail;
|
|
sc89890_register_otg_vbus_regulator(sc89890);
|
sc89890_create_device_node(sc89890->dev);
|
|
return 0;
|
|
irq_fail:
|
|
return ret;
|
}
|
|
static int sc89890_remove(struct i2c_client *client)
|
{
|
struct sc89890_device *sc89890 = i2c_get_clientdata(client);
|
|
/* reset all registers to default values */
|
sc89890_chip_reset(sc89890);
|
|
return 0;
|
}
|
|
#ifdef CONFIG_PM_SLEEP
|
static int sc89890_suspend(struct device *dev)
|
{
|
struct sc89890_device *sc89890 = dev_get_drvdata(dev);
|
|
/*
|
* If charger is removed, while in suspend, make sure ADC is disabled
|
* since it consumes slightly more power.
|
*/
|
return sc89890_field_write(sc89890, F_CONV_RATE, 0);
|
}
|
|
static int sc89890_resume(struct device *dev)
|
{
|
int ret;
|
struct sc89890_device *sc89890 = dev_get_drvdata(dev);
|
|
mutex_lock(&sc89890->lock);
|
|
ret = sc89890_get_chip_state(sc89890, &sc89890->state);
|
if (ret < 0)
|
goto unlock;
|
|
/* Re-enable ADC only if charger is plugged in. */
|
if (sc89890->state.online) {
|
ret = sc89890_field_write(sc89890, F_CONV_RATE, 1);
|
if (ret < 0)
|
goto unlock;
|
}
|
|
/* signal userspace, maybe state changed while suspended */
|
power_supply_changed(sc89890->charger);
|
|
unlock:
|
mutex_unlock(&sc89890->lock);
|
|
return ret;
|
}
|
#endif
|
|
static const struct dev_pm_ops sc89890_pm = {
|
SET_SYSTEM_SLEEP_PM_OPS(sc89890_suspend, sc89890_resume)
|
};
|
|
static const struct i2c_device_id sc89890_i2c_ids[] = {
|
{ "sc89890", 0 },
|
{},
|
};
|
MODULE_DEVICE_TABLE(i2c, sc89890_i2c_ids);
|
|
static const struct of_device_id sc89890_of_match[] = {
|
{ .compatible = "sc,sc89890", },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, sc89890_of_match);
|
|
#ifdef CONFIG_ACPI
|
static const struct acpi_device_id sc89890_acpi_match[] = {
|
{"SC898900", 0},
|
{},
|
};
|
MODULE_DEVICE_TABLE(acpi, sc89890_acpi_match);
|
#endif
|
|
static struct i2c_driver sc89890_driver = {
|
.driver = {
|
.name = "sc89890-charger",
|
.of_match_table = of_match_ptr(sc89890_of_match),
|
.acpi_match_table = ACPI_PTR(sc89890_acpi_match),
|
.pm = &sc89890_pm,
|
},
|
.probe = sc89890_probe,
|
.remove = sc89890_remove,
|
.id_table = sc89890_i2c_ids,
|
};
|
module_i2c_driver(sc89890_driver);
|
|
MODULE_AUTHOR("xsf<xsf@rock-chips.com>");
|
MODULE_DESCRIPTION("sc89890 charger driver");
|
MODULE_LICENSE("GPL");
|
