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