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Release 4.11 drivers/power/supply/qcom_smbb.c

/* Copyright (c) 2014, Sony Mobile Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This driver is for the multi-block Switch-Mode Battery Charger and Boost
 * (SMBB) hardware, found in Qualcomm PM8941 PMICs.  The charger is an
 * integrated, single-cell lithium-ion battery charger.
 *
 * Sub-components:
 *  - Charger core
 *  - Buck
 *  - DC charge-path
 *  - USB charge-path
 *  - Battery interface
 *  - Boost (not implemented)
 *  - Misc
 *  - HF-Buck
 */

#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/extcon.h>
#include <linux/regulator/driver.h>


#define SMBB_CHG_VMAX		0x040

#define SMBB_CHG_VSAFE		0x041

#define SMBB_CHG_CFG		0x043

#define SMBB_CHG_IMAX		0x044

#define SMBB_CHG_ISAFE		0x045

#define SMBB_CHG_VIN_MIN	0x047

#define SMBB_CHG_CTRL		0x049

#define CTRL_EN			BIT(7)

#define SMBB_CHG_VBAT_WEAK	0x052

#define SMBB_CHG_IBAT_TERM_CHG	0x05b

#define IBAT_TERM_CHG_IEOC	BIT(7)

#define IBAT_TERM_CHG_IEOC_BMS	BIT(7)

#define IBAT_TERM_CHG_IEOC_CHG	0

#define SMBB_CHG_VBAT_DET	0x05d

#define SMBB_CHG_TCHG_MAX_EN	0x060

#define TCHG_MAX_EN		BIT(7)

#define SMBB_CHG_WDOG_TIME	0x062

#define SMBB_CHG_WDOG_EN	0x065

#define WDOG_EN			BIT(7)


#define SMBB_BUCK_REG_MODE	0x174

#define BUCK_REG_MODE		BIT(0)

#define BUCK_REG_MODE_VBAT	BIT(0)

#define BUCK_REG_MODE_VSYS	0


#define SMBB_BAT_PRES_STATUS	0x208

#define PRES_STATUS_BAT_PRES	BIT(7)

#define SMBB_BAT_TEMP_STATUS	0x209

#define TEMP_STATUS_OK		BIT(7)

#define TEMP_STATUS_HOT		BIT(6)

#define SMBB_BAT_BTC_CTRL	0x249

#define BTC_CTRL_COMP_EN	BIT(7)

#define BTC_CTRL_COLD_EXT	BIT(1)

#define BTC_CTRL_HOT_EXT_N	BIT(0)


#define SMBB_USB_IMAX		0x344

#define SMBB_USB_OTG_CTL	0x348

#define OTG_CTL_EN		BIT(0)

#define SMBB_USB_ENUM_TIMER_STOP 0x34e

#define ENUM_TIMER_STOP		BIT(0)

#define SMBB_USB_SEC_ACCESS	0x3d0

#define SEC_ACCESS_MAGIC	0xa5

#define SMBB_USB_REV_BST	0x3ed

#define REV_BST_CHG_GONE	BIT(7)


#define SMBB_DC_IMAX		0x444


#define SMBB_MISC_REV2		0x601

#define SMBB_MISC_BOOT_DONE	0x642

#define BOOT_DONE		BIT(7)


#define STATUS_USBIN_VALID	BIT(0) 
/* USB connection is valid */

#define STATUS_DCIN_VALID	BIT(1) 
/* DC connection is valid */

#define STATUS_BAT_HOT		BIT(2) 
/* Battery temp 1=Hot, 0=Cold */

#define STATUS_BAT_OK		BIT(3) 
/* Battery temp OK */

#define STATUS_BAT_PRESENT	BIT(4) 
/* Battery is present */

#define STATUS_CHG_DONE		BIT(5) 
/* Charge cycle is complete */

#define STATUS_CHG_TRKL		BIT(6) 
/* Trickle charging */

#define STATUS_CHG_FAST		BIT(7) 
/* Fast charging */

#define STATUS_CHG_GONE		BIT(8) 
/* No charger is connected */


enum smbb_attr {
	
ATTR_BAT_ISAFE,
	
ATTR_BAT_IMAX,
	
ATTR_USBIN_IMAX,
	
ATTR_DCIN_IMAX,
	
ATTR_BAT_VSAFE,
	
ATTR_BAT_VMAX,
	
ATTR_BAT_VMIN,
	
ATTR_CHG_VDET,
	
ATTR_VIN_MIN,
	
_ATTR_CNT,
};


struct smbb_charger {
	
unsigned int revision;
	
unsigned int addr;
	
struct device *dev;
	
struct extcon_dev *edev;

	
bool dc_disabled;
	
bool jeita_ext_temp;
	
unsigned long status;
	
struct mutex statlock;

	
unsigned int attr[_ATTR_CNT];

	
struct power_supply *usb_psy;
	
struct power_supply *dc_psy;
	
struct power_supply *bat_psy;
	
struct regmap *regmap;

	
struct regulator_desc otg_rdesc;
	
struct regulator_dev *otg_reg;
};


static const unsigned int smbb_usb_extcon_cable[] = {
	EXTCON_USB,
	EXTCON_NONE,
};


static int smbb_vbat_weak_fn(unsigned int index) { return 2100000 + index * 100000; }

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static int smbb_vin_fn(unsigned int index) { if (index > 42) return 5600000 + (index - 43) * 200000; return 3400000 + index * 50000; }

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static int smbb_vmax_fn(unsigned int index) { return 3240000 + index * 10000; }

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static int smbb_vbat_det_fn(unsigned int index) { return 3240000 + index * 20000; }

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static int smbb_imax_fn(unsigned int index) { if (index < 2) return 100000 + index * 50000; return index * 100000; }

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static int smbb_bat_imax_fn(unsigned int index) { return index * 50000; }

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static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int)) { unsigned int widx; unsigned int sel; for (widx = sel = 0; (*fn)(widx) <= val; ++widx) sel = widx; return sel; }

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static const struct smbb_charger_attr { const char *name; unsigned int reg; unsigned int safe_reg; unsigned int max; unsigned int min; unsigned int fail_ok; int (*hw_fn)(unsigned int); } smbb_charger_attrs[] = { [ATTR_BAT_ISAFE] = { .name = "qcom,fast-charge-safe-current", .reg = SMBB_CHG_ISAFE, .max = 3000000, .min = 200000, .hw_fn = smbb_bat_imax_fn, .fail_ok = 1, }, [ATTR_BAT_IMAX] = { .name = "qcom,fast-charge-current-limit", .reg = SMBB_CHG_IMAX, .safe_reg = SMBB_CHG_ISAFE, .max = 3000000, .min = 200000, .hw_fn = smbb_bat_imax_fn, }, [ATTR_DCIN_IMAX] = { .name = "qcom,dc-current-limit", .reg = SMBB_DC_IMAX, .max = 2500000, .min = 100000, .hw_fn = smbb_imax_fn, }, [ATTR_BAT_VSAFE] = { .name = "qcom,fast-charge-safe-voltage", .reg = SMBB_CHG_VSAFE, .max = 5000000, .min = 3240000, .hw_fn = smbb_vmax_fn, .fail_ok = 1, }, [ATTR_BAT_VMAX] = { .name = "qcom,fast-charge-high-threshold-voltage", .reg = SMBB_CHG_VMAX, .safe_reg = SMBB_CHG_VSAFE, .max = 5000000, .min = 3240000, .hw_fn = smbb_vmax_fn, }, [ATTR_BAT_VMIN] = { .name = "qcom,fast-charge-low-threshold-voltage", .reg = SMBB_CHG_VBAT_WEAK, .max = 3600000, .min = 2100000, .hw_fn = smbb_vbat_weak_fn, }, [ATTR_CHG_VDET] = { .name = "qcom,auto-recharge-threshold-voltage", .reg = SMBB_CHG_VBAT_DET, .max = 5000000, .min = 3240000, .hw_fn = smbb_vbat_det_fn, }, [ATTR_VIN_MIN] = { .name = "qcom,minimum-input-voltage", .reg = SMBB_CHG_VIN_MIN, .max = 9600000, .min = 4200000, .hw_fn = smbb_vin_fn, }, [ATTR_USBIN_IMAX] = { .name = "usb-charge-current-limit", .reg = SMBB_USB_IMAX, .max = 2500000, .min = 100000, .hw_fn = smbb_imax_fn, }, };
static int smbb_charger_attr_write(struct smbb_charger *chg, enum smbb_attr which, unsigned int val) { const struct smbb_charger_attr *prop; unsigned int wval; unsigned int out; int rc; prop = &smbb_charger_attrs[which]; if (val > prop->max || val < prop->min) { dev_err(chg->dev, "value out of range for %s [%u:%u]\n", prop->name, prop->min, prop->max); return -EINVAL; } if (prop->safe_reg) { rc = regmap_read(chg->regmap, chg->addr + prop->safe_reg, &wval); if (rc) { dev_err(chg->dev, "unable to read safe value for '%s'\n", prop->name); return rc; } wval = prop->hw_fn(wval); if (val > wval) { dev_warn(chg->dev, "%s above safe value, clamping at %u\n", prop->name, wval); val = wval; } } wval = smbb_hw_lookup(val, prop->hw_fn); rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval); if (rc) { dev_err(chg->dev, "unable to update %s", prop->name); return rc; } out = prop->hw_fn(wval); if (out != val) { dev_warn(chg->dev, "%s inaccurate, rounded to %u\n", prop->name, out); } dev_dbg(chg->dev, "%s <= %d\n", prop->name, out); chg->attr[which] = out; return 0; }

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static int smbb_charger_attr_read(struct smbb_charger *chg, enum smbb_attr which) { const struct smbb_charger_attr *prop; unsigned int val; int rc; prop = &smbb_charger_attrs[which]; rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val); if (rc) { dev_err(chg->dev, "failed to read %s\n", prop->name); return rc; } val = prop->hw_fn(val); dev_dbg(chg->dev, "%s => %d\n", prop->name, val); chg->attr[which] = val; return 0; }

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static int smbb_charger_attr_parse(struct smbb_charger *chg, enum smbb_attr which) { const struct smbb_charger_attr *prop; unsigned int val; int rc; prop = &smbb_charger_attrs[which]; rc = of_property_read_u32(chg->dev->of_node, prop->name, &val); if (rc == 0) { rc = smbb_charger_attr_write(chg, which, val); if (!rc || !prop->fail_ok) return rc; } return smbb_charger_attr_read(chg, which); }

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static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag) { bool state; int ret; ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state); if (ret < 0) { dev_err(chg->dev, "failed to read irq line\n"); return; } mutex_lock(&chg->statlock); if (state) chg->status |= flag; else chg->status &= ~flag; mutex_unlock(&chg->statlock); dev_dbg(chg->dev, "status = %03lx\n", chg->status); }

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static irqreturn_t smbb_usb_valid_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID); extcon_set_state_sync(chg->edev, EXTCON_USB, chg->status & STATUS_USBIN_VALID); power_supply_changed(chg->usb_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_dc_valid_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID); if (!chg->dc_disabled) power_supply_changed(chg->dc_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_bat_temp_handler(int irq, void *_data) { struct smbb_charger *chg = _data; unsigned int val; int rc; rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val); if (rc) return IRQ_HANDLED; mutex_lock(&chg->statlock); if (val & TEMP_STATUS_OK) { chg->status |= STATUS_BAT_OK; } else { chg->status &= ~STATUS_BAT_OK; if (val & TEMP_STATUS_HOT) chg->status |= STATUS_BAT_HOT; } mutex_unlock(&chg->statlock); power_supply_changed(chg->bat_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_bat_present_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT); power_supply_changed(chg->bat_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_chg_done_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_CHG_DONE); power_supply_changed(chg->bat_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_chg_gone_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_CHG_GONE); power_supply_changed(chg->bat_psy); power_supply_changed(chg->usb_psy); if (!chg->dc_disabled) power_supply_changed(chg->dc_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_chg_fast_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_CHG_FAST); power_supply_changed(chg->bat_psy); return IRQ_HANDLED; }

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static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data) { struct smbb_charger *chg = _data; smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL); power_supply_changed(chg->bat_psy); return IRQ_HANDLED; }

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static const struct smbb_irq { const char *name; irqreturn_t (*handler)(int, void *); } smbb_charger_irqs[] = { { "chg-done", smbb_chg_done_handler }, { "chg-fast", smbb_chg_fast_handler }, { "chg-trkl", smbb_chg_trkl_handler }, { "bat-temp-ok", smbb_bat_temp_handler }, { "bat-present", smbb_bat_present_handler }, { "chg-gone", smbb_chg_gone_handler }, { "usb-valid", smbb_usb_valid_handler }, { "dc-valid", smbb_dc_valid_handler }, };
static int smbb_usbin_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); int rc = 0; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: mutex_lock(&chg->statlock); val->intval = !(chg->status & STATUS_CHG_GONE) && (chg->status & STATUS_USBIN_VALID); mutex_unlock(&chg->statlock); break; case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: val->intval = chg->attr[ATTR_USBIN_IMAX]; break; case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: val->intval = 2500000; break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_usbin_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); int rc; switch (psp) { case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX, val->intval); break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_dcin_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); int rc = 0; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: mutex_lock(&chg->statlock); val->intval = !(chg->status & STATUS_CHG_GONE) && (chg->status & STATUS_DCIN_VALID); mutex_unlock(&chg->statlock); break; case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: val->intval = chg->attr[ATTR_DCIN_IMAX]; break; case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX: val->intval = 2500000; break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_dcin_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); int rc; switch (psp) { case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT: rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX, val->intval); break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_charger_writable_property(struct power_supply *psy, enum power_supply_property psp) { return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT; }

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static int smbb_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); unsigned long status; int rc = 0; mutex_lock(&chg->statlock); status = chg->status; mutex_unlock(&chg->statlock); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (status & STATUS_CHG_GONE) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID))) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (status & STATUS_CHG_DONE) val->intval = POWER_SUPPLY_STATUS_FULL; else if (!(status & STATUS_BAT_OK)) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL)) val->intval = POWER_SUPPLY_STATUS_CHARGING; else /* everything is ok for charging, but we are not... */ val->intval = POWER_SUPPLY_STATUS_DISCHARGING; break; case POWER_SUPPLY_PROP_HEALTH: if (status & STATUS_BAT_OK) val->intval = POWER_SUPPLY_HEALTH_GOOD; else if (status & STATUS_BAT_HOT) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else val->intval = POWER_SUPPLY_HEALTH_COLD; break; case POWER_SUPPLY_PROP_CHARGE_TYPE: if (status & STATUS_CHG_FAST) val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; else if (status & STATUS_CHG_TRKL) val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; else val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = !!(status & STATUS_BAT_PRESENT); break; case POWER_SUPPLY_PROP_CURRENT_MAX: val->intval = chg->attr[ATTR_BAT_IMAX]; break; case POWER_SUPPLY_PROP_VOLTAGE_MAX: val->intval = chg->attr[ATTR_BAT_VMAX]; break; case POWER_SUPPLY_PROP_TECHNOLOGY: /* this charger is a single-cell lithium-ion battery charger * only. If you hook up some other technology, there will be * fireworks. */ val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: val->intval = 3000000; /* single-cell li-ion low end */ break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_battery_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct smbb_charger *chg = power_supply_get_drvdata(psy); int rc; switch (psp) { case POWER_SUPPLY_PROP_CURRENT_MAX: rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval); break; case POWER_SUPPLY_PROP_VOLTAGE_MAX: rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval); break; default: rc = -EINVAL; break; } return rc; }

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static int smbb_battery_writable_property(struct power_supply *psy, enum power_supply_property psp) { switch (psp) { case POWER_SUPPLY_PROP_CURRENT_MAX: case POWER_SUPPLY_PROP_VOLTAGE_MAX: return 1; default: return 0; } }

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static enum power_supply_property smbb_charger_properties[] = { POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, }; static enum power_supply_property smbb_battery_properties[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_CURRENT_MAX, POWER_SUPPLY_PROP_VOLTAGE_MAX, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_TECHNOLOGY, }; static const struct reg_off_mask_default { unsigned int offset; unsigned int mask; unsigned int value; unsigned int rev_mask; } smbb_charger_setup[] = { /* The bootloader is supposed to set this... make sure anyway. */ { SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE }, /* Disable software timer */ { SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 }, /* Clear and disable watchdog */ { SMBB_CHG_WDOG_TIME, 0xff, 160 }, { SMBB_CHG_WDOG_EN, WDOG_EN, 0 }, /* Use charger based EoC detection */ { SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG }, /* Disable GSM PA load adjustment. * The PA signal is incorrectly connected on v2. */ { SMBB_CHG_CFG, 0xff, 0x00, BIT(3) }, /* Use VBAT (not VSYS) to compensate for IR drop during fast charging */ { SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT }, /* Enable battery temperature comparators */ { SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN }, /* Stop USB enumeration timer */ { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, #if 0 /* FIXME supposedly only to disable hardware ARB termination */ { SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC }, { SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE }, #endif /* Stop USB enumeration timer, again */ { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP }, /* Enable charging */ { SMBB_CHG_CTRL, CTRL_EN, CTRL_EN }, }; static char *smbb_bif[] = { "smbb-bif" }; static const struct power_supply_desc bat_psy_desc = { .name = "smbb-bif", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = smbb_battery_properties, .num_properties = ARRAY_SIZE(smbb_battery_properties), .get_property = smbb_battery_get_property, .set_property = smbb_battery_set_property, .property_is_writeable = smbb_battery_writable_property, }; static const struct power_supply_desc usb_psy_desc = { .name = "smbb-usbin", .type = POWER_SUPPLY_TYPE_USB, .properties = smbb_charger_properties, .num_properties = ARRAY_SIZE(smbb_charger_properties), .get_property = smbb_usbin_get_property, .set_property = smbb_usbin_set_property, .property_is_writeable = smbb_charger_writable_property, }; static const struct power_supply_desc dc_psy_desc = { .name = "smbb-dcin", .type = POWER_SUPPLY_TYPE_MAINS, .properties = smbb_charger_properties, .num_properties = ARRAY_SIZE(smbb_charger_properties), .get_property = smbb_dcin_get_property, .set_property = smbb_dcin_set_property, .property_is_writeable = smbb_charger_writable_property, };
static int smbb_chg_otg_enable(struct regulator_dev *rdev) { struct smbb_charger *chg = rdev_get_drvdata(rdev); int rc; rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, OTG_CTL_EN, OTG_CTL_EN); if (rc) dev_err(chg->dev, "failed to update OTG_CTL\n"); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Tim Bird59100.00%1100.00%
Total59100.00%1100.00%


static int smbb_chg_otg_disable(struct regulator_dev *rdev) { struct smbb_charger *chg = rdev_get_drvdata(rdev); int rc; rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, OTG_CTL_EN, 0); if (rc) dev_err(chg->dev, "failed to update OTG_CTL\n"); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Tim Bird59100.00%1100.00%
Total59100.00%1100.00%


static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev) { struct smbb_charger *chg = rdev_get_drvdata(rdev); unsigned int value = 0; int rc; rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value); if (rc) dev_err(chg->dev, "failed to read OTG_CTL\n"); return !!(value & OTG_CTL_EN); }

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PersonTokensPropCommitsCommitProp
Tim Bird70100.00%1100.00%
Total70100.00%1100.00%

static const struct regulator_ops smbb_chg_otg_ops = { .enable = smbb_chg_otg_enable, .disable = smbb_chg_otg_disable, .is_enabled = smbb_chg_otg_is_enabled, };
static int smbb_charger_probe(struct platform_device *pdev) { struct power_supply_config bat_cfg = {}; struct power_supply_config usb_cfg = {}; struct power_supply_config dc_cfg = {}; struct smbb_charger *chg; struct regulator_config config = { }; int rc, i; chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL); if (!chg) return -ENOMEM; chg->dev = &pdev->dev; mutex_init(&chg->statlock); chg->regmap = dev_get_regmap(pdev->dev.parent, NULL); if (!chg->regmap) { dev_err(&pdev->dev, "failed to locate regmap\n"); return -ENODEV; } rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr); if (rc) { dev_err(&pdev->dev, "missing or invalid 'reg' property\n"); return rc; } rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision); if (rc) { dev_err(&pdev->dev, "unable to read revision\n"); return rc; } chg->revision += 1; if (chg->revision != 2 && chg->revision != 3) { dev_err(&pdev->dev, "v1 hardware not supported\n"); return -ENODEV; } dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision); chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc"); for (i = 0; i < _ATTR_CNT; ++i) { rc = smbb_charger_attr_parse(chg, i); if (rc) { dev_err(&pdev->dev, "failed to parse/apply settings\n"); return rc; } } bat_cfg.drv_data = chg; bat_cfg.of_node = pdev->dev.of_node; chg->bat_psy = devm_power_supply_register(&pdev->dev, &bat_psy_desc, &bat_cfg); if (IS_ERR(chg->bat_psy)) { dev_err(&pdev->dev, "failed to register battery\n"); return PTR_ERR(chg->bat_psy); } usb_cfg.drv_data = chg; usb_cfg.supplied_to = smbb_bif; usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); chg->usb_psy = devm_power_supply_register(&pdev->dev, &usb_psy_desc, &usb_cfg); if (IS_ERR(chg->usb_psy)) { dev_err(&pdev->dev, "failed to register USB power supply\n"); return PTR_ERR(chg->usb_psy); } chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable); if (IS_ERR(chg->edev)) { dev_err(&pdev->dev, "failed to allocate extcon device\n"); return -ENOMEM; } rc = devm_extcon_dev_register(&pdev->dev, chg->edev); if (rc < 0) { dev_err(&pdev->dev, "failed to register extcon device\n"); return rc; } if (!chg->dc_disabled) { dc_cfg.drv_data = chg; dc_cfg.supplied_to = smbb_bif; dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif); chg->dc_psy = devm_power_supply_register(&pdev->dev, &dc_psy_desc, &dc_cfg); if (IS_ERR(chg->dc_psy)) { dev_err(&pdev->dev, "failed to register DC power supply\n"); return PTR_ERR(chg->dc_psy); } } for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) { int irq; irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name); if (irq < 0) { dev_err(&pdev->dev, "failed to get irq '%s'\n", smbb_charger_irqs[i].name); return irq; } smbb_charger_irqs[i].handler(irq, chg); rc = devm_request_threaded_irq(&pdev->dev, irq, NULL, smbb_charger_irqs[i].handler, IRQF_ONESHOT, smbb_charger_irqs[i].name, chg); if (rc) { dev_err(&pdev->dev, "failed to request irq '%s'\n", smbb_charger_irqs[i].name); return rc; } } /* * otg regulator is used to control VBUS voltage direction * when USB switches between host and gadget mode */ chg->otg_rdesc.id = -1; chg->otg_rdesc.name = "otg-vbus"; chg->otg_rdesc.ops = &smbb_chg_otg_ops; chg->otg_rdesc.owner = THIS_MODULE; chg->otg_rdesc.type = REGULATOR_VOLTAGE; chg->otg_rdesc.supply_name = "usb-otg-in"; chg->otg_rdesc.of_match = "otg-vbus"; config.dev = &pdev->dev; config.driver_data = chg; chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc, &config); if (IS_ERR(chg->otg_reg)) return PTR_ERR(chg->otg_reg); chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node, "qcom,jeita-extended-temp-range"); /* Set temperature range to [35%:70%] or [25%:80%] accordingly */ rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL, BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N, chg->jeita_ext_temp ? BTC_CTRL_COLD_EXT : BTC_CTRL_HOT_EXT_N); if (rc) { dev_err(&pdev->dev, "unable to set %s temperature range\n", chg->jeita_ext_temp ? "JEITA extended" : "normal"); return rc; } for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) { const struct reg_off_mask_default *r = &smbb_charger_setup[i]; if (r->rev_mask & BIT(chg->revision)) continue; rc = regmap_update_bits(chg->regmap, chg->addr + r->offset, r->mask, r->value); if (rc) { dev_err(&pdev->dev, "unable to initializing charging, bailing\n"); return rc; } } platform_set_drvdata(pdev, chg); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Courtney Cavin81481.00%133.33%
Tim Bird11711.64%133.33%
Stephen Boyd747.36%133.33%
Total1005100.00%3100.00%


static int smbb_charger_remove(struct platform_device *pdev) { struct smbb_charger *chg; chg = platform_get_drvdata(pdev); regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Courtney Cavin43100.00%1100.00%
Total43100.00%1100.00%

static const struct of_device_id smbb_charger_id_table[] = { { .compatible = "qcom,pm8941-charger" }, { } }; MODULE_DEVICE_TABLE(of, smbb_charger_id_table); static struct platform_driver smbb_charger_driver = { .probe = smbb_charger_probe, .remove = smbb_charger_remove, .driver = { .name = "qcom-smbb", .of_match_table = smbb_charger_id_table, }, }; module_platform_driver(smbb_charger_driver); MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
Courtney Cavin400689.72%120.00%
Tim Bird3487.79%120.00%
Stephen Boyd1092.44%120.00%
Dan Carpenter10.02%120.00%
Chanwoo Choi10.02%120.00%
Total4465100.00%5100.00%
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