| /* |
| * TWL4030/TPS65950 BCI (Battery Charger Interface) driver |
| * |
| * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com> |
| * |
| * based on twl4030_bci_battery.c by TI |
| * Copyright (C) 2008 Texas Instruments, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/err.h> |
| #include <linux/platform_device.h> |
| #include <linux/interrupt.h> |
| #include <linux/i2c/twl.h> |
| #include <linux/power_supply.h> |
| #include <linux/notifier.h> |
| #include <linux/usb/otg.h> |
| |
| #define TWL4030_BCIMSTATEC 0x02 |
| #define TWL4030_BCIICHG 0x08 |
| #define TWL4030_BCIVAC 0x0a |
| #define TWL4030_BCIVBUS 0x0c |
| #define TWL4030_BCIMFSTS3 0x0F |
| #define TWL4030_BCIMFSTS4 0x10 |
| #define TWL4030_BCICTL1 0x23 |
| #define TWL4030_BB_CFG 0x12 |
| |
| #define TWL4030_BCIMFSTS1 0x01 |
| |
| #define TWL4030_BCIAUTOWEN BIT(5) |
| #define TWL4030_CONFIG_DONE BIT(4) |
| #define TWL4030_BCIAUTOUSB BIT(1) |
| #define TWL4030_BCIAUTOAC BIT(0) |
| #define TWL4030_CGAIN BIT(5) |
| #define TWL4030_USBFASTMCHG BIT(2) |
| #define TWL4030_STS_VBUS BIT(7) |
| #define TWL4030_STS_USB_ID BIT(2) |
| #define TWL4030_BBCHEN BIT(4) |
| #define TWL4030_BBSEL_MASK 0x0c |
| #define TWL4030_BBSEL_2V5 0x00 |
| #define TWL4030_BBSEL_3V0 0x04 |
| #define TWL4030_BBSEL_3V1 0x08 |
| #define TWL4030_BBSEL_3V2 0x0c |
| #define TWL4030_BBISEL_MASK 0x03 |
| #define TWL4030_BBISEL_25uA 0x00 |
| #define TWL4030_BBISEL_150uA 0x01 |
| #define TWL4030_BBISEL_500uA 0x02 |
| #define TWL4030_BBISEL_1000uA 0x03 |
| |
| #define TWL4030_BATSTSPCHG BIT(2) |
| #define TWL4030_BATSTSMCHG BIT(6) |
| |
| /* BCI interrupts */ |
| #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ |
| #define TWL4030_TMOVF BIT(1) /* Timer overflow */ |
| #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ |
| #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ |
| #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ |
| #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ |
| #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ |
| #define TWL4030_BATSTS BIT(7) /* Battery status */ |
| |
| #define TWL4030_VBATLVL BIT(0) /* VBAT level */ |
| #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ |
| #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ |
| #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ |
| |
| #define TWL4030_MSTATEC_USB BIT(4) |
| #define TWL4030_MSTATEC_AC BIT(5) |
| #define TWL4030_MSTATEC_MASK 0x0f |
| #define TWL4030_MSTATEC_QUICK1 0x02 |
| #define TWL4030_MSTATEC_QUICK7 0x07 |
| #define TWL4030_MSTATEC_COMPLETE1 0x0b |
| #define TWL4030_MSTATEC_COMPLETE4 0x0e |
| |
| static bool allow_usb; |
| module_param(allow_usb, bool, 0644); |
| MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
| |
| struct twl4030_bci { |
| struct device *dev; |
| struct power_supply *ac; |
| struct power_supply *usb; |
| struct usb_phy *transceiver; |
| struct notifier_block usb_nb; |
| struct work_struct work; |
| int irq_chg; |
| int irq_bci; |
| int usb_enabled; |
| |
| unsigned long event; |
| }; |
| |
| /* |
| * clear and set bits on an given register on a given module |
| */ |
| static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) |
| { |
| u8 val = 0; |
| int ret; |
| |
| ret = twl_i2c_read_u8(mod_no, &val, reg); |
| if (ret) |
| return ret; |
| |
| val &= ~clear; |
| val |= set; |
| |
| return twl_i2c_write_u8(mod_no, val, reg); |
| } |
| |
| static int twl4030_bci_read(u8 reg, u8 *val) |
| { |
| return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
| } |
| |
| static int twl4030_clear_set_boot_bci(u8 clear, u8 set) |
| { |
| return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
| TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
| TWL4030_PM_MASTER_BOOT_BCI); |
| } |
| |
| static int twl4030bci_read_adc_val(u8 reg) |
| { |
| int ret, temp; |
| u8 val; |
| |
| /* read MSB */ |
| ret = twl4030_bci_read(reg + 1, &val); |
| if (ret) |
| return ret; |
| |
| temp = (int)(val & 0x03) << 8; |
| |
| /* read LSB */ |
| ret = twl4030_bci_read(reg, &val); |
| if (ret) |
| return ret; |
| |
| return temp | val; |
| } |
| |
| /* |
| * Check if Battery Pack was present |
| */ |
| static int twl4030_is_battery_present(struct twl4030_bci *bci) |
| { |
| int ret; |
| u8 val = 0; |
| |
| /* Battery presence in Main charge? */ |
| ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); |
| if (ret) |
| return ret; |
| if (val & TWL4030_BATSTSMCHG) |
| return 0; |
| |
| /* |
| * OK, It could be that bootloader did not enable main charger, |
| * pre-charge is h/w auto. So, Battery presence in Pre-charge? |
| */ |
| ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, |
| TWL4030_BCIMFSTS1); |
| if (ret) |
| return ret; |
| if (val & TWL4030_BATSTSPCHG) |
| return 0; |
| |
| return -ENODEV; |
| } |
| |
| /* |
| * Check if VBUS power is present |
| */ |
| static int twl4030_bci_have_vbus(struct twl4030_bci *bci) |
| { |
| int ret; |
| u8 hwsts; |
| |
| ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &hwsts, |
| TWL4030_PM_MASTER_STS_HW_CONDITIONS); |
| if (ret < 0) |
| return 0; |
| |
| dev_dbg(bci->dev, "check_vbus: HW_CONDITIONS %02x\n", hwsts); |
| |
| /* in case we also have STS_USB_ID, VBUS is driven by TWL itself */ |
| if ((hwsts & TWL4030_STS_VBUS) && !(hwsts & TWL4030_STS_USB_ID)) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* |
| * Enable/Disable USB Charge functionality. |
| */ |
| static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) |
| { |
| int ret; |
| |
| if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
| /* Check for USB charger connected */ |
| if (!twl4030_bci_have_vbus(bci)) |
| return -ENODEV; |
| |
| /* |
| * Until we can find out what current the device can provide, |
| * require a module param to enable USB charging. |
| */ |
| if (!allow_usb) { |
| dev_warn(bci->dev, "USB charging is disabled.\n"); |
| return -EACCES; |
| } |
| |
| /* Need to keep phy powered */ |
| if (!bci->usb_enabled) { |
| pm_runtime_get_sync(bci->transceiver->dev); |
| bci->usb_enabled = 1; |
| } |
| |
| /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
| ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); |
| if (ret < 0) |
| return ret; |
| |
| /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ |
| ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
| TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
| } else { |
| ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); |
| if (bci->usb_enabled) { |
| pm_runtime_mark_last_busy(bci->transceiver->dev); |
| pm_runtime_put_autosuspend(bci->transceiver->dev); |
| bci->usb_enabled = 0; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Enable/Disable AC Charge funtionality. |
| */ |
| static int twl4030_charger_enable_ac(bool enable) |
| { |
| int ret; |
| |
| if (enable) |
| ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); |
| else |
| ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); |
| |
| return ret; |
| } |
| |
| /* |
| * Enable/Disable charging of Backup Battery. |
| */ |
| static int twl4030_charger_enable_backup(int uvolt, int uamp) |
| { |
| int ret; |
| u8 flags; |
| |
| if (uvolt < 2500000 || |
| uamp < 25) { |
| /* disable charging of backup battery */ |
| ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
| TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
| return ret; |
| } |
| |
| flags = TWL4030_BBCHEN; |
| if (uvolt >= 3200000) |
| flags |= TWL4030_BBSEL_3V2; |
| else if (uvolt >= 3100000) |
| flags |= TWL4030_BBSEL_3V1; |
| else if (uvolt >= 3000000) |
| flags |= TWL4030_BBSEL_3V0; |
| else |
| flags |= TWL4030_BBSEL_2V5; |
| |
| if (uamp >= 1000) |
| flags |= TWL4030_BBISEL_1000uA; |
| else if (uamp >= 500) |
| flags |= TWL4030_BBISEL_500uA; |
| else if (uamp >= 150) |
| flags |= TWL4030_BBISEL_150uA; |
| else |
| flags |= TWL4030_BBISEL_25uA; |
| |
| ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
| TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
| flags, |
| TWL4030_BB_CFG); |
| |
| return ret; |
| } |
| |
| /* |
| * TWL4030 CHG_PRES (AC charger presence) events |
| */ |
| static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) |
| { |
| struct twl4030_bci *bci = arg; |
| |
| dev_dbg(bci->dev, "CHG_PRES irq\n"); |
| power_supply_changed(bci->ac); |
| power_supply_changed(bci->usb); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * TWL4030 BCI monitoring events |
| */ |
| static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) |
| { |
| struct twl4030_bci *bci = arg; |
| u8 irqs1, irqs2; |
| int ret; |
| |
| ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, |
| TWL4030_INTERRUPTS_BCIISR1A); |
| if (ret < 0) |
| return IRQ_HANDLED; |
| |
| ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, |
| TWL4030_INTERRUPTS_BCIISR2A); |
| if (ret < 0) |
| return IRQ_HANDLED; |
| |
| dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); |
| |
| if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { |
| /* charger state change, inform the core */ |
| power_supply_changed(bci->ac); |
| power_supply_changed(bci->usb); |
| } |
| |
| /* various monitoring events, for now we just log them here */ |
| if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) |
| dev_warn(bci->dev, "battery temperature out of range\n"); |
| |
| if (irqs1 & TWL4030_BATSTS) |
| dev_crit(bci->dev, "battery disconnected\n"); |
| |
| if (irqs2 & TWL4030_VBATOV) |
| dev_crit(bci->dev, "VBAT overvoltage\n"); |
| |
| if (irqs2 & TWL4030_VBUSOV) |
| dev_crit(bci->dev, "VBUS overvoltage\n"); |
| |
| if (irqs2 & TWL4030_ACCHGOV) |
| dev_crit(bci->dev, "Ac charger overvoltage\n"); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void twl4030_bci_usb_work(struct work_struct *data) |
| { |
| struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
| |
| switch (bci->event) { |
| case USB_EVENT_VBUS: |
| case USB_EVENT_CHARGER: |
| twl4030_charger_enable_usb(bci, true); |
| break; |
| case USB_EVENT_NONE: |
| twl4030_charger_enable_usb(bci, false); |
| break; |
| } |
| } |
| |
| static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, |
| void *priv) |
| { |
| struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
| |
| dev_dbg(bci->dev, "OTG notify %lu\n", val); |
| |
| bci->event = val; |
| schedule_work(&bci->work); |
| |
| return NOTIFY_OK; |
| } |
| |
| /* |
| * TI provided formulas: |
| * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 |
| * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 |
| * Here we use integer approximation of: |
| * CGAIN == 0: val * 1.6618 - 0.85 |
| * CGAIN == 1: (val * 1.6618 - 0.85) * 2 |
| */ |
| static int twl4030_charger_get_current(void) |
| { |
| int curr; |
| int ret; |
| u8 bcictl1; |
| |
| curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); |
| if (curr < 0) |
| return curr; |
| |
| ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); |
| if (ret) |
| return ret; |
| |
| ret = (curr * 16618 - 850 * 10000) / 10; |
| if (bcictl1 & TWL4030_CGAIN) |
| ret *= 2; |
| |
| return ret; |
| } |
| |
| /* |
| * Returns the main charge FSM state |
| * Or < 0 on failure. |
| */ |
| static int twl4030bci_state(struct twl4030_bci *bci) |
| { |
| int ret; |
| u8 state; |
| |
| ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); |
| if (ret) { |
| pr_err("twl4030_bci: error reading BCIMSTATEC\n"); |
| return ret; |
| } |
| |
| dev_dbg(bci->dev, "state: %02x\n", state); |
| |
| return state; |
| } |
| |
| static int twl4030_bci_state_to_status(int state) |
| { |
| state &= TWL4030_MSTATEC_MASK; |
| if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) |
| return POWER_SUPPLY_STATUS_CHARGING; |
| else if (TWL4030_MSTATEC_COMPLETE1 <= state && |
| state <= TWL4030_MSTATEC_COMPLETE4) |
| return POWER_SUPPLY_STATUS_FULL; |
| else |
| return POWER_SUPPLY_STATUS_NOT_CHARGING; |
| } |
| |
| static int twl4030_bci_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
| int is_charging; |
| int state; |
| int ret; |
| |
| state = twl4030bci_state(bci); |
| if (state < 0) |
| return state; |
| |
| if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
| is_charging = state & TWL4030_MSTATEC_USB; |
| else |
| is_charging = state & TWL4030_MSTATEC_AC; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| if (is_charging) |
| val->intval = twl4030_bci_state_to_status(state); |
| else |
| val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| /* charging must be active for meaningful result */ |
| if (!is_charging) |
| return -ENODATA; |
| if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
| ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
| if (ret < 0) |
| return ret; |
| /* BCIVBUS uses ADCIN8, 7/1023 V/step */ |
| val->intval = ret * 6843; |
| } else { |
| ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); |
| if (ret < 0) |
| return ret; |
| /* BCIVAC uses ADCIN11, 10/1023 V/step */ |
| val->intval = ret * 9775; |
| } |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| if (!is_charging) |
| return -ENODATA; |
| /* current measurement is shared between AC and USB */ |
| ret = twl4030_charger_get_current(); |
| if (ret < 0) |
| return ret; |
| val->intval = ret; |
| break; |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = is_charging && |
| twl4030_bci_state_to_status(state) != |
| POWER_SUPPLY_STATUS_NOT_CHARGING; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static enum power_supply_property twl4030_charger_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| }; |
| |
| #ifdef CONFIG_OF |
| static const struct twl4030_bci_platform_data * |
| twl4030_bci_parse_dt(struct device *dev) |
| { |
| struct device_node *np = dev->of_node; |
| struct twl4030_bci_platform_data *pdata; |
| u32 num; |
| |
| if (!np) |
| return NULL; |
| pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| if (!pdata) |
| return pdata; |
| |
| if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) |
| pdata->bb_uvolt = num; |
| if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) |
| pdata->bb_uamp = num; |
| return pdata; |
| } |
| #else |
| static inline const struct twl4030_bci_platform_data * |
| twl4030_bci_parse_dt(struct device *dev) |
| { |
| return NULL; |
| } |
| #endif |
| |
| static const struct power_supply_desc twl4030_bci_ac_desc = { |
| .name = "twl4030_ac", |
| .type = POWER_SUPPLY_TYPE_MAINS, |
| .properties = twl4030_charger_props, |
| .num_properties = ARRAY_SIZE(twl4030_charger_props), |
| .get_property = twl4030_bci_get_property, |
| }; |
| |
| static const struct power_supply_desc twl4030_bci_usb_desc = { |
| .name = "twl4030_usb", |
| .type = POWER_SUPPLY_TYPE_USB, |
| .properties = twl4030_charger_props, |
| .num_properties = ARRAY_SIZE(twl4030_charger_props), |
| .get_property = twl4030_bci_get_property, |
| }; |
| |
| static int __init twl4030_bci_probe(struct platform_device *pdev) |
| { |
| struct twl4030_bci *bci; |
| const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
| int ret; |
| u32 reg; |
| |
| bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
| if (bci == NULL) |
| return -ENOMEM; |
| |
| if (!pdata) |
| pdata = twl4030_bci_parse_dt(&pdev->dev); |
| |
| bci->dev = &pdev->dev; |
| bci->irq_chg = platform_get_irq(pdev, 0); |
| bci->irq_bci = platform_get_irq(pdev, 1); |
| |
| /* Only proceed further *IF* battery is physically present */ |
| ret = twl4030_is_battery_present(bci); |
| if (ret) { |
| dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); |
| return ret; |
| } |
| |
| platform_set_drvdata(pdev, bci); |
| |
| bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
| NULL); |
| if (IS_ERR(bci->ac)) { |
| ret = PTR_ERR(bci->ac); |
| dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
| return ret; |
| } |
| |
| bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
| NULL); |
| if (IS_ERR(bci->usb)) { |
| ret = PTR_ERR(bci->usb); |
| dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
| return ret; |
| } |
| |
| ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
| twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
| bci); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "could not request irq %d, status %d\n", |
| bci->irq_chg, ret); |
| return ret; |
| } |
| |
| ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
| twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "could not request irq %d, status %d\n", |
| bci->irq_bci, ret); |
| return ret; |
| } |
| |
| INIT_WORK(&bci->work, twl4030_bci_usb_work); |
| |
| bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
| if (bci->dev->of_node) { |
| struct device_node *phynode; |
| |
| phynode = of_find_compatible_node(bci->dev->of_node->parent, |
| NULL, "ti,twl4030-usb"); |
| if (phynode) |
| bci->transceiver = devm_usb_get_phy_by_node( |
| bci->dev, phynode, &bci->usb_nb); |
| } |
| |
| /* Enable interrupts now. */ |
| reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
| TWL4030_TBATOR1 | TWL4030_BATSTS); |
| ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
| TWL4030_INTERRUPTS_BCIIMR1A); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); |
| return ret; |
| } |
| |
| reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
| ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
| TWL4030_INTERRUPTS_BCIIMR2A); |
| if (ret < 0) |
| dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); |
| |
| twl4030_charger_enable_ac(true); |
| twl4030_charger_enable_usb(bci, true); |
| if (pdata) |
| twl4030_charger_enable_backup(pdata->bb_uvolt, |
| pdata->bb_uamp); |
| else |
| twl4030_charger_enable_backup(0, 0); |
| |
| return 0; |
| } |
| |
| static int __exit twl4030_bci_remove(struct platform_device *pdev) |
| { |
| struct twl4030_bci *bci = platform_get_drvdata(pdev); |
| |
| twl4030_charger_enable_ac(false); |
| twl4030_charger_enable_usb(bci, false); |
| twl4030_charger_enable_backup(0, 0); |
| |
| /* mask interrupts */ |
| twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, |
| TWL4030_INTERRUPTS_BCIIMR1A); |
| twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, |
| TWL4030_INTERRUPTS_BCIIMR2A); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id twl_bci_of_match[] = { |
| {.compatible = "ti,twl4030-bci", }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, twl_bci_of_match); |
| |
| static struct platform_driver twl4030_bci_driver = { |
| .driver = { |
| .name = "twl4030_bci", |
| .of_match_table = of_match_ptr(twl_bci_of_match), |
| }, |
| .remove = __exit_p(twl4030_bci_remove), |
| }; |
| |
| module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe); |
| |
| MODULE_AUTHOR("Gražvydas Ignotas"); |
| MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:twl4030_bci"); |