diff options
Diffstat (limited to 'drivers/power/supply/smb347-charger.c')
| -rw-r--r-- | drivers/power/supply/smb347-charger.c | 1642 |
1 files changed, 1642 insertions, 0 deletions
diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c new file mode 100644 index 000000000..996a82f8a --- /dev/null +++ b/drivers/power/supply/smb347-charger.c @@ -0,0 +1,1642 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Summit Microelectronics SMB347 Battery Charger Driver + * + * Copyright (C) 2011, Intel Corporation + * + * Authors: Bruce E. Robertson <bruce.e.robertson@intel.com> + * Mika Westerberg <mika.westerberg@linux.intel.com> + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/power_supply.h> +#include <linux/property.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> + +#include <dt-bindings/power/summit,smb347-charger.h> + +/* Use the default compensation method */ +#define SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT -1 + +/* Use default factory programmed value for hard/soft temperature limit */ +#define SMB3XX_TEMP_USE_DEFAULT -273 + +/* + * Configuration registers. These are mirrored to volatile RAM and can be + * written once %CMD_A_ALLOW_WRITE is set in %CMD_A register. They will be + * reloaded from non-volatile registers after POR. + */ +#define CFG_CHARGE_CURRENT 0x00 +#define CFG_CHARGE_CURRENT_FCC_MASK 0xe0 +#define CFG_CHARGE_CURRENT_FCC_SHIFT 5 +#define CFG_CHARGE_CURRENT_PCC_MASK 0x18 +#define CFG_CHARGE_CURRENT_PCC_SHIFT 3 +#define CFG_CHARGE_CURRENT_TC_MASK 0x07 +#define CFG_CURRENT_LIMIT 0x01 +#define CFG_CURRENT_LIMIT_DC_MASK 0xf0 +#define CFG_CURRENT_LIMIT_DC_SHIFT 4 +#define CFG_CURRENT_LIMIT_USB_MASK 0x0f +#define CFG_FLOAT_VOLTAGE 0x03 +#define CFG_FLOAT_VOLTAGE_FLOAT_MASK 0x3f +#define CFG_FLOAT_VOLTAGE_THRESHOLD_MASK 0xc0 +#define CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT 6 +#define CFG_STAT 0x05 +#define CFG_STAT_DISABLED BIT(5) +#define CFG_STAT_ACTIVE_HIGH BIT(7) +#define CFG_PIN 0x06 +#define CFG_PIN_EN_CTRL_MASK 0x60 +#define CFG_PIN_EN_CTRL_ACTIVE_HIGH 0x40 +#define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60 +#define CFG_PIN_EN_APSD_IRQ BIT(1) +#define CFG_PIN_EN_CHARGER_ERROR BIT(2) +#define CFG_PIN_EN_CTRL BIT(4) +#define CFG_THERM 0x07 +#define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03 +#define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0 +#define CFG_THERM_SOFT_COLD_COMPENSATION_MASK 0x0c +#define CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT 2 +#define CFG_THERM_MONITOR_DISABLED BIT(4) +#define CFG_SYSOK 0x08 +#define CFG_SYSOK_INOK_ACTIVE_HIGH BIT(0) +#define CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED BIT(2) +#define CFG_OTHER 0x09 +#define CFG_OTHER_RID_MASK 0xc0 +#define CFG_OTHER_RID_ENABLED_AUTO_OTG 0xc0 +#define CFG_OTG 0x0a +#define CFG_OTG_TEMP_THRESHOLD_MASK 0x30 +#define CFG_OTG_CURRENT_LIMIT_250mA BIT(2) +#define CFG_OTG_CURRENT_LIMIT_750mA BIT(3) +#define CFG_OTG_TEMP_THRESHOLD_SHIFT 4 +#define CFG_OTG_CC_COMPENSATION_MASK 0xc0 +#define CFG_OTG_CC_COMPENSATION_SHIFT 6 +#define CFG_TEMP_LIMIT 0x0b +#define CFG_TEMP_LIMIT_SOFT_HOT_MASK 0x03 +#define CFG_TEMP_LIMIT_SOFT_HOT_SHIFT 0 +#define CFG_TEMP_LIMIT_SOFT_COLD_MASK 0x0c +#define CFG_TEMP_LIMIT_SOFT_COLD_SHIFT 2 +#define CFG_TEMP_LIMIT_HARD_HOT_MASK 0x30 +#define CFG_TEMP_LIMIT_HARD_HOT_SHIFT 4 +#define CFG_TEMP_LIMIT_HARD_COLD_MASK 0xc0 +#define CFG_TEMP_LIMIT_HARD_COLD_SHIFT 6 +#define CFG_FAULT_IRQ 0x0c +#define CFG_FAULT_IRQ_DCIN_UV BIT(2) +#define CFG_STATUS_IRQ 0x0d +#define CFG_STATUS_IRQ_TERMINATION_OR_TAPER BIT(4) +#define CFG_STATUS_IRQ_CHARGE_TIMEOUT BIT(7) +#define CFG_ADDRESS 0x0e + +/* Command registers */ +#define CMD_A 0x30 +#define CMD_A_CHG_ENABLED BIT(1) +#define CMD_A_SUSPEND_ENABLED BIT(2) +#define CMD_A_OTG_ENABLED BIT(4) +#define CMD_A_ALLOW_WRITE BIT(7) +#define CMD_B 0x31 +#define CMD_C 0x33 + +/* Interrupt Status registers */ +#define IRQSTAT_A 0x35 +#define IRQSTAT_C 0x37 +#define IRQSTAT_C_TERMINATION_STAT BIT(0) +#define IRQSTAT_C_TERMINATION_IRQ BIT(1) +#define IRQSTAT_C_TAPER_IRQ BIT(3) +#define IRQSTAT_D 0x38 +#define IRQSTAT_D_CHARGE_TIMEOUT_STAT BIT(2) +#define IRQSTAT_D_CHARGE_TIMEOUT_IRQ BIT(3) +#define IRQSTAT_E 0x39 +#define IRQSTAT_E_USBIN_UV_STAT BIT(0) +#define IRQSTAT_E_USBIN_UV_IRQ BIT(1) +#define IRQSTAT_E_DCIN_UV_STAT BIT(4) +#define IRQSTAT_E_DCIN_UV_IRQ BIT(5) +#define IRQSTAT_F 0x3a + +/* Status registers */ +#define STAT_A 0x3b +#define STAT_A_FLOAT_VOLTAGE_MASK 0x3f +#define STAT_B 0x3c +#define STAT_C 0x3d +#define STAT_C_CHG_ENABLED BIT(0) +#define STAT_C_HOLDOFF_STAT BIT(3) +#define STAT_C_CHG_MASK 0x06 +#define STAT_C_CHG_SHIFT 1 +#define STAT_C_CHG_TERM BIT(5) +#define STAT_C_CHARGER_ERROR BIT(6) +#define STAT_E 0x3f + +#define SMB347_MAX_REGISTER 0x3f + +/** + * struct smb347_charger - smb347 charger instance + * @dev: pointer to device + * @regmap: pointer to driver regmap + * @mains: power_supply instance for AC/DC power + * @usb: power_supply instance for USB power + * @usb_rdev: USB VBUS regulator device + * @id: SMB charger ID + * @mains_online: is AC/DC input connected + * @usb_online: is USB input connected + * @irq_unsupported: is interrupt unsupported by SMB hardware + * @usb_vbus_enabled: is USB VBUS powered by SMB charger + * @max_charge_current: maximum current (in uA) the battery can be charged + * @max_charge_voltage: maximum voltage (in uV) the battery can be charged + * @pre_charge_current: current (in uA) to use in pre-charging phase + * @termination_current: current (in uA) used to determine when the + * charging cycle terminates + * @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to + * pre-charge to fast charge mode + * @mains_current_limit: maximum input current drawn from AC/DC input (in uA) + * @usb_hc_current_limit: maximum input high current (in uA) drawn from USB + * input + * @chip_temp_threshold: die temperature where device starts limiting charge + * current [%100 - %130] (in degree C) + * @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C), + * granularity is 5 deg C. + * @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C), + * granularity is 5 deg C. + * @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C), + * granularity is 5 deg C. + * @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C), + * granularity is 5 deg C. + * @suspend_on_hard_temp_limit: suspend charging when hard limit is hit + * @soft_temp_limit_compensation: compensation method when soft temperature + * limit is hit + * @charge_current_compensation: current (in uA) for charging compensation + * current when temperature hits soft limits + * @use_mains: AC/DC input can be used + * @use_usb: USB input can be used + * @use_usb_otg: USB OTG output can be used (not implemented yet) + * @enable_control: how charging enable/disable is controlled + * (driver/pin controls) + * @inok_polarity: polarity of INOK signal which denotes presence of external + * power supply + * + * @use_main, @use_usb, and @use_usb_otg are means to enable/disable + * hardware support for these. This is useful when we want to have for + * example OTG charging controlled via OTG transceiver driver and not by + * the SMB347 hardware. + * + * Hard and soft temperature limit values are given as described in the + * device data sheet and assuming NTC beta value is %3750. Even if this is + * not the case, these values should be used. They can be mapped to the + * corresponding NTC beta values with the help of table %2 in the data + * sheet. So for example if NTC beta is %3375 and we want to program hard + * hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50. + * + * If zero value is given in any of the current and voltage values, the + * factory programmed default will be used. For soft/hard temperature + * values, pass in %SMB3XX_TEMP_USE_DEFAULT instead. + */ +struct smb347_charger { + struct device *dev; + struct regmap *regmap; + struct power_supply *mains; + struct power_supply *usb; + struct regulator_dev *usb_rdev; + unsigned int id; + bool mains_online; + bool usb_online; + bool irq_unsupported; + bool usb_vbus_enabled; + + unsigned int max_charge_current; + unsigned int max_charge_voltage; + unsigned int pre_charge_current; + unsigned int termination_current; + unsigned int pre_to_fast_voltage; + unsigned int mains_current_limit; + unsigned int usb_hc_current_limit; + unsigned int chip_temp_threshold; + int soft_cold_temp_limit; + int soft_hot_temp_limit; + int hard_cold_temp_limit; + int hard_hot_temp_limit; + bool suspend_on_hard_temp_limit; + unsigned int soft_temp_limit_compensation; + unsigned int charge_current_compensation; + bool use_mains; + bool use_usb; + bool use_usb_otg; + unsigned int enable_control; + unsigned int inok_polarity; +}; + +enum smb_charger_chipid { + SMB345, + SMB347, + SMB358, + NUM_CHIP_TYPES, +}; + +/* Fast charge current in uA */ +static const unsigned int fcc_tbl[NUM_CHIP_TYPES][8] = { + [SMB345] = { 200000, 450000, 600000, 900000, + 1300000, 1500000, 1800000, 2000000 }, + [SMB347] = { 700000, 900000, 1200000, 1500000, + 1800000, 2000000, 2200000, 2500000 }, + [SMB358] = { 200000, 450000, 600000, 900000, + 1300000, 1500000, 1800000, 2000000 }, +}; +/* Pre-charge current in uA */ +static const unsigned int pcc_tbl[NUM_CHIP_TYPES][4] = { + [SMB345] = { 150000, 250000, 350000, 450000 }, + [SMB347] = { 100000, 150000, 200000, 250000 }, + [SMB358] = { 150000, 250000, 350000, 450000 }, +}; + +/* Termination current in uA */ +static const unsigned int tc_tbl[NUM_CHIP_TYPES][8] = { + [SMB345] = { 30000, 40000, 60000, 80000, + 100000, 125000, 150000, 200000 }, + [SMB347] = { 37500, 50000, 100000, 150000, + 200000, 250000, 500000, 600000 }, + [SMB358] = { 30000, 40000, 60000, 80000, + 100000, 125000, 150000, 200000 }, +}; + +/* Input current limit in uA */ +static const unsigned int icl_tbl[NUM_CHIP_TYPES][10] = { + [SMB345] = { 300000, 500000, 700000, 1000000, 1500000, + 1800000, 2000000, 2000000, 2000000, 2000000 }, + [SMB347] = { 300000, 500000, 700000, 900000, 1200000, + 1500000, 1800000, 2000000, 2200000, 2500000 }, + [SMB358] = { 300000, 500000, 700000, 1000000, 1500000, + 1800000, 2000000, 2000000, 2000000, 2000000 }, +}; + +/* Charge current compensation in uA */ +static const unsigned int ccc_tbl[NUM_CHIP_TYPES][4] = { + [SMB345] = { 200000, 450000, 600000, 900000 }, + [SMB347] = { 250000, 700000, 900000, 1200000 }, + [SMB358] = { 200000, 450000, 600000, 900000 }, +}; + +/* Convert register value to current using lookup table */ +static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val) +{ + if (val >= size) + return -EINVAL; + return tbl[val]; +} + +/* Convert current to register value using lookup table */ +static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val) +{ + size_t i; + + for (i = 0; i < size; i++) + if (val < tbl[i]) + break; + return i > 0 ? i - 1 : -EINVAL; +} + +/** + * smb347_update_ps_status - refreshes the power source status + * @smb: pointer to smb347 charger instance + * + * Function checks whether any power source is connected to the charger and + * updates internal state accordingly. If there is a change to previous state + * function returns %1, otherwise %0 and negative errno in case of errror. + */ +static int smb347_update_ps_status(struct smb347_charger *smb) +{ + bool usb = false; + bool dc = false; + unsigned int val; + int ret; + + ret = regmap_read(smb->regmap, IRQSTAT_E, &val); + if (ret < 0) + return ret; + + /* + * Dc and usb are set depending on whether they are enabled in + * platform data _and_ whether corresponding undervoltage is set. + */ + if (smb->use_mains) + dc = !(val & IRQSTAT_E_DCIN_UV_STAT); + if (smb->use_usb) + usb = !(val & IRQSTAT_E_USBIN_UV_STAT); + + ret = smb->mains_online != dc || smb->usb_online != usb; + smb->mains_online = dc; + smb->usb_online = usb; + + return ret; +} + +/* + * smb347_is_ps_online - returns whether input power source is connected + * @smb: pointer to smb347 charger instance + * + * Returns %true if input power source is connected. Note that this is + * dependent on what platform has configured for usable power sources. For + * example if USB is disabled, this will return %false even if the USB cable + * is connected. + */ +static bool smb347_is_ps_online(struct smb347_charger *smb) +{ + return smb->usb_online || smb->mains_online; +} + +/** + * smb347_charging_status - returns status of charging + * @smb: pointer to smb347 charger instance + * + * Function returns charging status. %0 means no charging is in progress, + * %1 means pre-charging, %2 fast-charging and %3 taper-charging. + */ +static int smb347_charging_status(struct smb347_charger *smb) +{ + unsigned int val; + int ret; + + if (!smb347_is_ps_online(smb)) + return 0; + + ret = regmap_read(smb->regmap, STAT_C, &val); + if (ret < 0) + return 0; + + return (val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT; +} + +static int smb347_charging_set(struct smb347_charger *smb, bool enable) +{ + if (smb->enable_control != SMB3XX_CHG_ENABLE_SW) { + dev_dbg(smb->dev, "charging enable/disable in SW disabled\n"); + return 0; + } + + if (enable && smb->usb_vbus_enabled) { + dev_dbg(smb->dev, "charging not enabled because USB is in host mode\n"); + return 0; + } + + return regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED, + enable ? CMD_A_CHG_ENABLED : 0); +} + +static inline int smb347_charging_enable(struct smb347_charger *smb) +{ + return smb347_charging_set(smb, true); +} + +static inline int smb347_charging_disable(struct smb347_charger *smb) +{ + return smb347_charging_set(smb, false); +} + +static int smb347_start_stop_charging(struct smb347_charger *smb) +{ + int ret; + + /* + * Depending on whether valid power source is connected or not, we + * disable or enable the charging. We do it manually because it + * depends on how the platform has configured the valid inputs. + */ + if (smb347_is_ps_online(smb)) { + ret = smb347_charging_enable(smb); + if (ret < 0) + dev_err(smb->dev, "failed to enable charging\n"); + } else { + ret = smb347_charging_disable(smb); + if (ret < 0) + dev_err(smb->dev, "failed to disable charging\n"); + } + + return ret; +} + +static int smb347_set_charge_current(struct smb347_charger *smb) +{ + unsigned int id = smb->id; + int ret; + + if (smb->max_charge_current) { + ret = current_to_hw(fcc_tbl[id], ARRAY_SIZE(fcc_tbl[id]), + smb->max_charge_current); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, + CFG_CHARGE_CURRENT_FCC_MASK, + ret << CFG_CHARGE_CURRENT_FCC_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->pre_charge_current) { + ret = current_to_hw(pcc_tbl[id], ARRAY_SIZE(pcc_tbl[id]), + smb->pre_charge_current); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, + CFG_CHARGE_CURRENT_PCC_MASK, + ret << CFG_CHARGE_CURRENT_PCC_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->termination_current) { + ret = current_to_hw(tc_tbl[id], ARRAY_SIZE(tc_tbl[id]), + smb->termination_current); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, + CFG_CHARGE_CURRENT_TC_MASK, ret); + if (ret < 0) + return ret; + } + + return 0; +} + +static int smb347_set_current_limits(struct smb347_charger *smb) +{ + unsigned int id = smb->id; + int ret; + + if (smb->mains_current_limit) { + ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]), + smb->mains_current_limit); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT, + CFG_CURRENT_LIMIT_DC_MASK, + ret << CFG_CURRENT_LIMIT_DC_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->usb_hc_current_limit) { + ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]), + smb->usb_hc_current_limit); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT, + CFG_CURRENT_LIMIT_USB_MASK, ret); + if (ret < 0) + return ret; + } + + return 0; +} + +static int smb347_set_voltage_limits(struct smb347_charger *smb) +{ + int ret; + + if (smb->pre_to_fast_voltage) { + ret = smb->pre_to_fast_voltage; + + /* uV */ + ret = clamp_val(ret, 2400000, 3000000) - 2400000; + ret /= 200000; + + ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE, + CFG_FLOAT_VOLTAGE_THRESHOLD_MASK, + ret << CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->max_charge_voltage) { + ret = smb->max_charge_voltage; + + /* uV */ + ret = clamp_val(ret, 3500000, 4500000) - 3500000; + ret /= 20000; + + ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE, + CFG_FLOAT_VOLTAGE_FLOAT_MASK, ret); + if (ret < 0) + return ret; + } + + return 0; +} + +static int smb347_set_temp_limits(struct smb347_charger *smb) +{ + unsigned int id = smb->id; + bool enable_therm_monitor = false; + int ret = 0; + int val; + + if (smb->chip_temp_threshold) { + val = smb->chip_temp_threshold; + + /* degree C */ + val = clamp_val(val, 100, 130) - 100; + val /= 10; + + ret = regmap_update_bits(smb->regmap, CFG_OTG, + CFG_OTG_TEMP_THRESHOLD_MASK, + val << CFG_OTG_TEMP_THRESHOLD_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->soft_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { + val = smb->soft_cold_temp_limit; + + val = clamp_val(val, 0, 15); + val /= 5; + /* this goes from higher to lower so invert the value */ + val = ~val & 0x3; + + ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, + CFG_TEMP_LIMIT_SOFT_COLD_MASK, + val << CFG_TEMP_LIMIT_SOFT_COLD_SHIFT); + if (ret < 0) + return ret; + + enable_therm_monitor = true; + } + + if (smb->soft_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { + val = smb->soft_hot_temp_limit; + + val = clamp_val(val, 40, 55) - 40; + val /= 5; + + ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, + CFG_TEMP_LIMIT_SOFT_HOT_MASK, + val << CFG_TEMP_LIMIT_SOFT_HOT_SHIFT); + if (ret < 0) + return ret; + + enable_therm_monitor = true; + } + + if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { + val = smb->hard_cold_temp_limit; + + val = clamp_val(val, -5, 10) + 5; + val /= 5; + /* this goes from higher to lower so invert the value */ + val = ~val & 0x3; + + ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, + CFG_TEMP_LIMIT_HARD_COLD_MASK, + val << CFG_TEMP_LIMIT_HARD_COLD_SHIFT); + if (ret < 0) + return ret; + + enable_therm_monitor = true; + } + + if (smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { + val = smb->hard_hot_temp_limit; + + val = clamp_val(val, 50, 65) - 50; + val /= 5; + + ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, + CFG_TEMP_LIMIT_HARD_HOT_MASK, + val << CFG_TEMP_LIMIT_HARD_HOT_SHIFT); + if (ret < 0) + return ret; + + enable_therm_monitor = true; + } + + /* + * If any of the temperature limits are set, we also enable the + * thermistor monitoring. + * + * When soft limits are hit, the device will start to compensate + * current and/or voltage depending on the configuration. + * + * When hard limit is hit, the device will suspend charging + * depending on the configuration. + */ + if (enable_therm_monitor) { + ret = regmap_update_bits(smb->regmap, CFG_THERM, + CFG_THERM_MONITOR_DISABLED, 0); + if (ret < 0) + return ret; + } + + if (smb->suspend_on_hard_temp_limit) { + ret = regmap_update_bits(smb->regmap, CFG_SYSOK, + CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED, 0); + if (ret < 0) + return ret; + } + + if (smb->soft_temp_limit_compensation != + SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT) { + val = smb->soft_temp_limit_compensation & 0x3; + + ret = regmap_update_bits(smb->regmap, CFG_THERM, + CFG_THERM_SOFT_HOT_COMPENSATION_MASK, + val << CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT); + if (ret < 0) + return ret; + + ret = regmap_update_bits(smb->regmap, CFG_THERM, + CFG_THERM_SOFT_COLD_COMPENSATION_MASK, + val << CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT); + if (ret < 0) + return ret; + } + + if (smb->charge_current_compensation) { + val = current_to_hw(ccc_tbl[id], ARRAY_SIZE(ccc_tbl[id]), + smb->charge_current_compensation); + if (val < 0) + return val; + + ret = regmap_update_bits(smb->regmap, CFG_OTG, + CFG_OTG_CC_COMPENSATION_MASK, + (val & 0x3) << CFG_OTG_CC_COMPENSATION_SHIFT); + if (ret < 0) + return ret; + } + + return ret; +} + +/* + * smb347_set_writable - enables/disables writing to non-volatile registers + * @smb: pointer to smb347 charger instance + * + * You can enable/disable writing to the non-volatile configuration + * registers by calling this function. + * + * Returns %0 on success and negative errno in case of failure. + */ +static int smb347_set_writable(struct smb347_charger *smb, bool writable, + bool irq_toggle) +{ + struct i2c_client *client = to_i2c_client(smb->dev); + int ret; + + if (writable && irq_toggle && !smb->irq_unsupported) + disable_irq(client->irq); + + ret = regmap_update_bits(smb->regmap, CMD_A, CMD_A_ALLOW_WRITE, + writable ? CMD_A_ALLOW_WRITE : 0); + + if ((!writable || ret) && irq_toggle && !smb->irq_unsupported) + enable_irq(client->irq); + + return ret; +} + +static int smb347_hw_init(struct smb347_charger *smb) +{ + unsigned int val; + int ret; + + ret = smb347_set_writable(smb, true, false); + if (ret < 0) + return ret; + + /* + * Program the platform specific configuration values to the device + * first. + */ + ret = smb347_set_charge_current(smb); + if (ret < 0) + goto fail; + + ret = smb347_set_current_limits(smb); + if (ret < 0) + goto fail; + + ret = smb347_set_voltage_limits(smb); + if (ret < 0) + goto fail; + + ret = smb347_set_temp_limits(smb); + if (ret < 0) + goto fail; + + /* If USB charging is disabled we put the USB in suspend mode */ + if (!smb->use_usb) { + ret = regmap_update_bits(smb->regmap, CMD_A, + CMD_A_SUSPEND_ENABLED, + CMD_A_SUSPEND_ENABLED); + if (ret < 0) + goto fail; + } + + /* + * If configured by platform data, we enable hardware Auto-OTG + * support for driving VBUS. Otherwise we disable it. + */ + ret = regmap_update_bits(smb->regmap, CFG_OTHER, CFG_OTHER_RID_MASK, + smb->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0); + if (ret < 0) + goto fail; + + /* Activate pin control, making it writable. */ + switch (smb->enable_control) { + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW: + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH: + ret = regmap_set_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL); + if (ret < 0) + goto fail; + } + + /* + * Make the charging functionality controllable by a write to the + * command register unless pin control is specified in the platform + * data. + */ + switch (smb->enable_control) { + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW: + val = CFG_PIN_EN_CTRL_ACTIVE_LOW; + break; + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH: + val = CFG_PIN_EN_CTRL_ACTIVE_HIGH; + break; + default: + val = 0; + break; + } + + ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL_MASK, + val); + if (ret < 0) + goto fail; + + /* Disable Automatic Power Source Detection (APSD) interrupt. */ + ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_APSD_IRQ, 0); + if (ret < 0) + goto fail; + + ret = smb347_update_ps_status(smb); + if (ret < 0) + goto fail; + + ret = smb347_start_stop_charging(smb); + +fail: + smb347_set_writable(smb, false, false); + return ret; +} + +static irqreturn_t smb347_interrupt(int irq, void *data) +{ + struct smb347_charger *smb = data; + unsigned int stat_c, irqstat_c, irqstat_d, irqstat_e; + bool handled = false; + int ret; + + /* SMB347 it needs at least 20ms for setting IRQSTAT_E_*IN_UV_IRQ */ + usleep_range(25000, 35000); + + ret = regmap_read(smb->regmap, STAT_C, &stat_c); + if (ret < 0) { + dev_warn(smb->dev, "reading STAT_C failed\n"); + return IRQ_NONE; + } + + ret = regmap_read(smb->regmap, IRQSTAT_C, &irqstat_c); + if (ret < 0) { + dev_warn(smb->dev, "reading IRQSTAT_C failed\n"); + return IRQ_NONE; + } + + ret = regmap_read(smb->regmap, IRQSTAT_D, &irqstat_d); + if (ret < 0) { + dev_warn(smb->dev, "reading IRQSTAT_D failed\n"); + return IRQ_NONE; + } + + ret = regmap_read(smb->regmap, IRQSTAT_E, &irqstat_e); + if (ret < 0) { + dev_warn(smb->dev, "reading IRQSTAT_E failed\n"); + return IRQ_NONE; + } + + /* + * If we get charger error we report the error back to user. + * If the error is recovered charging will resume again. + */ + if (stat_c & STAT_C_CHARGER_ERROR) { + dev_err(smb->dev, "charging stopped due to charger error\n"); + if (smb->use_mains) + power_supply_changed(smb->mains); + if (smb->use_usb) + power_supply_changed(smb->usb); + handled = true; + } + + /* + * If we reached the termination current the battery is charged and + * we can update the status now. Charging is automatically + * disabled by the hardware. + */ + if (irqstat_c & (IRQSTAT_C_TERMINATION_IRQ | IRQSTAT_C_TAPER_IRQ)) { + if (irqstat_c & IRQSTAT_C_TERMINATION_STAT) { + if (smb->use_mains) + power_supply_changed(smb->mains); + if (smb->use_usb) + power_supply_changed(smb->usb); + } + dev_dbg(smb->dev, "going to HW maintenance mode\n"); + handled = true; + } + + /* + * If we got a charger timeout INT that means the charge + * full is not detected with in charge timeout value. + */ + if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_IRQ) { + dev_dbg(smb->dev, "total Charge Timeout INT received\n"); + + if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_STAT) + dev_warn(smb->dev, "charging stopped due to timeout\n"); + if (smb->use_mains) + power_supply_changed(smb->mains); + if (smb->use_usb) + power_supply_changed(smb->usb); + handled = true; + } + + /* + * If we got an under voltage interrupt it means that AC/USB input + * was connected or disconnected. + */ + if (irqstat_e & (IRQSTAT_E_USBIN_UV_IRQ | IRQSTAT_E_DCIN_UV_IRQ)) { + if (smb347_update_ps_status(smb) > 0) { + smb347_start_stop_charging(smb); + if (smb->use_mains) + power_supply_changed(smb->mains); + if (smb->use_usb) + power_supply_changed(smb->usb); + } + handled = true; + } + + return handled ? IRQ_HANDLED : IRQ_NONE; +} + +static int smb347_irq_set(struct smb347_charger *smb, bool enable) +{ + int ret; + + if (smb->irq_unsupported) + return 0; + + ret = smb347_set_writable(smb, true, true); + if (ret < 0) + return ret; + + /* + * Enable/disable interrupts for: + * - under voltage + * - termination current reached + * - charger timeout + * - charger error + */ + ret = regmap_update_bits(smb->regmap, CFG_FAULT_IRQ, 0xff, + enable ? CFG_FAULT_IRQ_DCIN_UV : 0); + if (ret < 0) + goto fail; + + ret = regmap_update_bits(smb->regmap, CFG_STATUS_IRQ, 0xff, + enable ? (CFG_STATUS_IRQ_TERMINATION_OR_TAPER | + CFG_STATUS_IRQ_CHARGE_TIMEOUT) : 0); + if (ret < 0) + goto fail; + + ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CHARGER_ERROR, + enable ? CFG_PIN_EN_CHARGER_ERROR : 0); +fail: + smb347_set_writable(smb, false, true); + return ret; +} + +static inline int smb347_irq_enable(struct smb347_charger *smb) +{ + return smb347_irq_set(smb, true); +} + +static inline int smb347_irq_disable(struct smb347_charger *smb) +{ + return smb347_irq_set(smb, false); +} + +static int smb347_irq_init(struct smb347_charger *smb, + struct i2c_client *client) +{ + int ret; + + smb->irq_unsupported = true; + + /* + * Interrupt pin is optional. If it is connected, we setup the + * interrupt support here. + */ + if (!client->irq) + return 0; + + ret = smb347_set_writable(smb, true, false); + if (ret < 0) + return ret; + + /* + * Configure the STAT output to be suitable for interrupts: disable + * all other output (except interrupts) and make it active low. + */ + ret = regmap_update_bits(smb->regmap, CFG_STAT, + CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED, + CFG_STAT_DISABLED); + + smb347_set_writable(smb, false, false); + + if (ret < 0) { + dev_warn(smb->dev, "failed to initialize IRQ: %d\n", ret); + dev_warn(smb->dev, "disabling IRQ support\n"); + return 0; + } + + ret = devm_request_threaded_irq(smb->dev, client->irq, NULL, + smb347_interrupt, IRQF_ONESHOT, + client->name, smb); + if (ret) + return ret; + + smb->irq_unsupported = false; + + ret = smb347_irq_enable(smb); + if (ret < 0) + return ret; + + return 0; +} + +/* + * Returns the constant charge current programmed + * into the charger in uA. + */ +static int get_const_charge_current(struct smb347_charger *smb) +{ + unsigned int id = smb->id; + int ret, intval; + unsigned int v; + + if (!smb347_is_ps_online(smb)) + return -ENODATA; + + ret = regmap_read(smb->regmap, STAT_B, &v); + if (ret < 0) + return ret; + + /* + * The current value is composition of FCC and PCC values + * and we can detect which table to use from bit 5. + */ + if (v & 0x20) { + intval = hw_to_current(fcc_tbl[id], + ARRAY_SIZE(fcc_tbl[id]), v & 7); + } else { + v >>= 3; + intval = hw_to_current(pcc_tbl[id], + ARRAY_SIZE(pcc_tbl[id]), v & 7); + } + + return intval; +} + +/* + * Returns the constant charge voltage programmed + * into the charger in uV. + */ +static int get_const_charge_voltage(struct smb347_charger *smb) +{ + int ret, intval; + unsigned int v; + + if (!smb347_is_ps_online(smb)) + return -ENODATA; + + ret = regmap_read(smb->regmap, STAT_A, &v); + if (ret < 0) + return ret; + + v &= STAT_A_FLOAT_VOLTAGE_MASK; + if (v > 0x3d) + v = 0x3d; + + intval = 3500000 + v * 20000; + + return intval; +} + +static int smb347_get_charging_status(struct smb347_charger *smb, + struct power_supply *psy) +{ + int ret, status; + unsigned int val; + + if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { + if (!smb->usb_online) + return POWER_SUPPLY_STATUS_DISCHARGING; + } else { + if (!smb->mains_online) + return POWER_SUPPLY_STATUS_DISCHARGING; + } + + ret = regmap_read(smb->regmap, STAT_C, &val); + if (ret < 0) + return ret; + + if ((val & STAT_C_CHARGER_ERROR) || + (val & STAT_C_HOLDOFF_STAT)) { + /* + * set to NOT CHARGING upon charger error + * or charging has stopped. + */ + status = POWER_SUPPLY_STATUS_NOT_CHARGING; + } else { + if ((val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT) { + /* + * set to charging if battery is in pre-charge, + * fast charge or taper charging mode. + */ + status = POWER_SUPPLY_STATUS_CHARGING; + } else if (val & STAT_C_CHG_TERM) { + /* + * set the status to FULL if battery is not in pre + * charge, fast charge or taper charging mode AND + * charging is terminated at least once. + */ + status = POWER_SUPPLY_STATUS_FULL; + } else { + /* + * in this case no charger error or termination + * occured but charging is not in progress!!! + */ + status = POWER_SUPPLY_STATUS_NOT_CHARGING; + } + } + + return status; +} + +static int smb347_get_property_locked(struct power_supply *psy, + enum power_supply_property prop, + union power_supply_propval *val) +{ + struct smb347_charger *smb = power_supply_get_drvdata(psy); + int ret; + + switch (prop) { + case POWER_SUPPLY_PROP_STATUS: + ret = smb347_get_charging_status(smb, psy); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { + if (!smb->usb_online) + return -ENODATA; + } else { + if (!smb->mains_online) + return -ENODATA; + } + + /* + * We handle trickle and pre-charging the same, and taper + * and none the same. + */ + switch (smb347_charging_status(smb)) { + case 1: + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + case 2: + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + default: + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + } + break; + + case POWER_SUPPLY_PROP_ONLINE: + if (psy->desc->type == POWER_SUPPLY_TYPE_USB) + val->intval = smb->usb_online; + else + val->intval = smb->mains_online; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + ret = get_const_charge_voltage(smb); + if (ret < 0) + return ret; + val->intval = ret; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = get_const_charge_current(smb); + if (ret < 0) + return ret; + val->intval = ret; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int smb347_get_property(struct power_supply *psy, + enum power_supply_property prop, + union power_supply_propval *val) +{ + struct smb347_charger *smb = power_supply_get_drvdata(psy); + struct i2c_client *client = to_i2c_client(smb->dev); + int ret; + + if (!smb->irq_unsupported) + disable_irq(client->irq); + + ret = smb347_get_property_locked(psy, prop, val); + + if (!smb->irq_unsupported) + enable_irq(client->irq); + + return ret; +} + +static enum power_supply_property smb347_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, +}; + +static bool smb347_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case IRQSTAT_A: + case IRQSTAT_C: + case IRQSTAT_D: + case IRQSTAT_E: + case IRQSTAT_F: + case STAT_A: + case STAT_B: + case STAT_C: + case STAT_E: + return true; + } + + return false; +} + +static bool smb347_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case CFG_CHARGE_CURRENT: + case CFG_CURRENT_LIMIT: + case CFG_FLOAT_VOLTAGE: + case CFG_STAT: + case CFG_PIN: + case CFG_THERM: + case CFG_SYSOK: + case CFG_OTHER: + case CFG_OTG: + case CFG_TEMP_LIMIT: + case CFG_FAULT_IRQ: + case CFG_STATUS_IRQ: + case CFG_ADDRESS: + case CMD_A: + case CMD_B: + case CMD_C: + return true; + } + + return smb347_volatile_reg(dev, reg); +} + +static void smb347_dt_parse_dev_info(struct smb347_charger *smb) +{ + struct device *dev = smb->dev; + + smb->soft_temp_limit_compensation = + SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT; + /* + * These properties come from the battery info, still we need to + * pre-initialize the values. See smb347_get_battery_info() below. + */ + smb->soft_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT; + smb->hard_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT; + smb->soft_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT; + smb->hard_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT; + + /* Charging constraints */ + device_property_read_u32(dev, "summit,fast-voltage-threshold-microvolt", + &smb->pre_to_fast_voltage); + device_property_read_u32(dev, "summit,mains-current-limit-microamp", + &smb->mains_current_limit); + device_property_read_u32(dev, "summit,usb-current-limit-microamp", + &smb->usb_hc_current_limit); + + /* For thermometer monitoring */ + device_property_read_u32(dev, "summit,chip-temperature-threshold-celsius", + &smb->chip_temp_threshold); + device_property_read_u32(dev, "summit,soft-compensation-method", + &smb->soft_temp_limit_compensation); + device_property_read_u32(dev, "summit,charge-current-compensation-microamp", + &smb->charge_current_compensation); + + /* Supported charging mode */ + smb->use_mains = device_property_read_bool(dev, "summit,enable-mains-charging"); + smb->use_usb = device_property_read_bool(dev, "summit,enable-usb-charging"); + smb->use_usb_otg = device_property_read_bool(dev, "summit,enable-otg-charging"); + + /* Select charging control */ + device_property_read_u32(dev, "summit,enable-charge-control", + &smb->enable_control); + + /* + * Polarity of INOK signal indicating presence of external power + * supply connected to the charger. + */ + device_property_read_u32(dev, "summit,inok-polarity", + &smb->inok_polarity); +} + +static int smb347_get_battery_info(struct smb347_charger *smb) +{ + struct power_supply_battery_info *info; + struct power_supply *supply; + int err; + + if (smb->mains) + supply = smb->mains; + else + supply = smb->usb; + + err = power_supply_get_battery_info(supply, &info); + if (err == -ENXIO || err == -ENODEV) + return 0; + if (err) + return err; + + if (info->constant_charge_current_max_ua != -EINVAL) + smb->max_charge_current = info->constant_charge_current_max_ua; + + if (info->constant_charge_voltage_max_uv != -EINVAL) + smb->max_charge_voltage = info->constant_charge_voltage_max_uv; + + if (info->precharge_current_ua != -EINVAL) + smb->pre_charge_current = info->precharge_current_ua; + + if (info->charge_term_current_ua != -EINVAL) + smb->termination_current = info->charge_term_current_ua; + + if (info->temp_alert_min != INT_MIN) + smb->soft_cold_temp_limit = info->temp_alert_min; + + if (info->temp_alert_max != INT_MAX) + smb->soft_hot_temp_limit = info->temp_alert_max; + + if (info->temp_min != INT_MIN) + smb->hard_cold_temp_limit = info->temp_min; + + if (info->temp_max != INT_MAX) + smb->hard_hot_temp_limit = info->temp_max; + + /* Suspend when battery temperature is outside hard limits */ + if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT || + smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) + smb->suspend_on_hard_temp_limit = true; + + return 0; +} + +static int smb347_usb_vbus_get_current_limit(struct regulator_dev *rdev) +{ + struct smb347_charger *smb = rdev_get_drvdata(rdev); + unsigned int val; + int ret; + + ret = regmap_read(smb->regmap, CFG_OTG, &val); + if (ret < 0) + return ret; + + /* + * It's unknown what happens if this bit is unset due to lack of + * access to the datasheet, assume it's limit-enable. + */ + if (!(val & CFG_OTG_CURRENT_LIMIT_250mA)) + return 0; + + return val & CFG_OTG_CURRENT_LIMIT_750mA ? 750000 : 250000; +} + +static int smb347_usb_vbus_set_new_current_limit(struct smb347_charger *smb, + int max_uA) +{ + const unsigned int mask = CFG_OTG_CURRENT_LIMIT_750mA | + CFG_OTG_CURRENT_LIMIT_250mA; + unsigned int val = CFG_OTG_CURRENT_LIMIT_250mA; + int ret; + + if (max_uA >= 750000) + val |= CFG_OTG_CURRENT_LIMIT_750mA; + + ret = regmap_update_bits(smb->regmap, CFG_OTG, mask, val); + if (ret < 0) + dev_err(smb->dev, "failed to change USB current limit\n"); + + return ret; +} + +static int smb347_usb_vbus_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct smb347_charger *smb = rdev_get_drvdata(rdev); + int ret; + + ret = smb347_set_writable(smb, true, true); + if (ret < 0) + return ret; + + ret = smb347_usb_vbus_set_new_current_limit(smb, max_uA); + smb347_set_writable(smb, false, true); + + return ret; +} + +static int smb347_usb_vbus_regulator_enable(struct regulator_dev *rdev) +{ + struct smb347_charger *smb = rdev_get_drvdata(rdev); + int ret, max_uA; + + ret = smb347_set_writable(smb, true, true); + if (ret < 0) + return ret; + + smb347_charging_disable(smb); + + if (device_property_read_bool(&rdev->dev, "summit,needs-inok-toggle")) { + unsigned int sysok = 0; + + if (smb->inok_polarity == SMB3XX_SYSOK_INOK_ACTIVE_LOW) + sysok = CFG_SYSOK_INOK_ACTIVE_HIGH; + + /* + * VBUS won't be powered if INOK is active, so we need to + * manually disable INOK on some platforms. + */ + ret = regmap_update_bits(smb->regmap, CFG_SYSOK, + CFG_SYSOK_INOK_ACTIVE_HIGH, sysok); + if (ret < 0) { + dev_err(smb->dev, "failed to disable INOK\n"); + goto done; + } + } + + ret = smb347_usb_vbus_get_current_limit(rdev); + if (ret < 0) { + dev_err(smb->dev, "failed to get USB VBUS current limit\n"); + goto done; + } + + max_uA = ret; + + ret = smb347_usb_vbus_set_new_current_limit(smb, 250000); + if (ret < 0) { + dev_err(smb->dev, "failed to preset USB VBUS current limit\n"); + goto done; + } + + ret = regmap_set_bits(smb->regmap, CMD_A, CMD_A_OTG_ENABLED); + if (ret < 0) { + dev_err(smb->dev, "failed to enable USB VBUS\n"); + goto done; + } + + smb->usb_vbus_enabled = true; + + ret = smb347_usb_vbus_set_new_current_limit(smb, max_uA); + if (ret < 0) { + dev_err(smb->dev, "failed to restore USB VBUS current limit\n"); + goto done; + } +done: + smb347_set_writable(smb, false, true); + + return ret; +} + +static int smb347_usb_vbus_regulator_disable(struct regulator_dev *rdev) +{ + struct smb347_charger *smb = rdev_get_drvdata(rdev); + int ret; + + ret = smb347_set_writable(smb, true, true); + if (ret < 0) + return ret; + + ret = regmap_clear_bits(smb->regmap, CMD_A, CMD_A_OTG_ENABLED); + if (ret < 0) { + dev_err(smb->dev, "failed to disable USB VBUS\n"); + goto done; + } + + smb->usb_vbus_enabled = false; + + if (device_property_read_bool(&rdev->dev, "summit,needs-inok-toggle")) { + unsigned int sysok = 0; + + if (smb->inok_polarity == SMB3XX_SYSOK_INOK_ACTIVE_HIGH) + sysok = CFG_SYSOK_INOK_ACTIVE_HIGH; + + ret = regmap_update_bits(smb->regmap, CFG_SYSOK, + CFG_SYSOK_INOK_ACTIVE_HIGH, sysok); + if (ret < 0) { + dev_err(smb->dev, "failed to enable INOK\n"); + goto done; + } + } + + smb347_start_stop_charging(smb); +done: + smb347_set_writable(smb, false, true); + + return ret; +} + +static const struct regmap_config smb347_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = SMB347_MAX_REGISTER, + .volatile_reg = smb347_volatile_reg, + .readable_reg = smb347_readable_reg, + .cache_type = REGCACHE_RBTREE, +}; + +static const struct regulator_ops smb347_usb_vbus_regulator_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = smb347_usb_vbus_regulator_enable, + .disable = smb347_usb_vbus_regulator_disable, + .get_current_limit = smb347_usb_vbus_get_current_limit, + .set_current_limit = smb347_usb_vbus_set_current_limit, +}; + +static const struct power_supply_desc smb347_mains_desc = { + .name = "smb347-mains", + .type = POWER_SUPPLY_TYPE_MAINS, + .get_property = smb347_get_property, + .properties = smb347_properties, + .num_properties = ARRAY_SIZE(smb347_properties), +}; + +static const struct power_supply_desc smb347_usb_desc = { + .name = "smb347-usb", + .type = POWER_SUPPLY_TYPE_USB, + .get_property = smb347_get_property, + .properties = smb347_properties, + .num_properties = ARRAY_SIZE(smb347_properties), +}; + +static const struct regulator_desc smb347_usb_vbus_regulator_desc = { + .name = "smb347-usb-vbus", + .of_match = of_match_ptr("usb-vbus"), + .ops = &smb347_usb_vbus_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .enable_reg = CMD_A, + .enable_mask = CMD_A_OTG_ENABLED, + .enable_val = CMD_A_OTG_ENABLED, + .fixed_uV = 5000000, + .n_voltages = 1, +}; + +static int smb347_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct power_supply_config mains_usb_cfg = {}; + struct regulator_config usb_rdev_cfg = {}; + struct device *dev = &client->dev; + struct smb347_charger *smb; + int ret; + + smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL); + if (!smb) + return -ENOMEM; + smb->dev = &client->dev; + smb->id = id->driver_data; + i2c_set_clientdata(client, smb); + + smb347_dt_parse_dev_info(smb); + if (!smb->use_mains && !smb->use_usb) + return -EINVAL; + + smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap); + if (IS_ERR(smb->regmap)) + return PTR_ERR(smb->regmap); + + mains_usb_cfg.drv_data = smb; + mains_usb_cfg.of_node = dev->of_node; + if (smb->use_mains) { + smb->mains = devm_power_supply_register(dev, &smb347_mains_desc, + &mains_usb_cfg); + if (IS_ERR(smb->mains)) + return PTR_ERR(smb->mains); + } + + if (smb->use_usb) { + smb->usb = devm_power_supply_register(dev, &smb347_usb_desc, + &mains_usb_cfg); + if (IS_ERR(smb->usb)) + return PTR_ERR(smb->usb); + } + + ret = smb347_get_battery_info(smb); + if (ret) + return ret; + + ret = smb347_hw_init(smb); + if (ret < 0) + return ret; + + ret = smb347_irq_init(smb, client); + if (ret) + return ret; + + usb_rdev_cfg.dev = dev; + usb_rdev_cfg.driver_data = smb; + usb_rdev_cfg.regmap = smb->regmap; + + smb->usb_rdev = devm_regulator_register(dev, + &smb347_usb_vbus_regulator_desc, + &usb_rdev_cfg); + if (IS_ERR(smb->usb_rdev)) { + smb347_irq_disable(smb); + return PTR_ERR(smb->usb_rdev); + } + + return 0; +} + +static void smb347_remove(struct i2c_client *client) +{ + struct smb347_charger *smb = i2c_get_clientdata(client); + + smb347_usb_vbus_regulator_disable(smb->usb_rdev); + smb347_irq_disable(smb); +} + +static void smb347_shutdown(struct i2c_client *client) +{ + smb347_remove(client); +} + +static const struct i2c_device_id smb347_id[] = { + { "smb345", SMB345 }, + { "smb347", SMB347 }, + { "smb358", SMB358 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, smb347_id); + +static const struct of_device_id smb3xx_of_match[] = { + { .compatible = "summit,smb345" }, + { .compatible = "summit,smb347" }, + { .compatible = "summit,smb358" }, + { }, +}; +MODULE_DEVICE_TABLE(of, smb3xx_of_match); + +static struct i2c_driver smb347_driver = { + .driver = { + .name = "smb347", + .of_match_table = smb3xx_of_match, + }, + .probe = smb347_probe, + .remove = smb347_remove, + .shutdown = smb347_shutdown, + .id_table = smb347_id, +}; +module_i2c_driver(smb347_driver); + +MODULE_AUTHOR("Bruce E. Robertson <bruce.e.robertson@intel.com>"); +MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); +MODULE_DESCRIPTION("SMB347 battery charger driver"); +MODULE_LICENSE("GPL"); |