// SPDX-License-Identifier: GPL-2.0-or-later /* * TWL4030/TPS65950 BCI (Battery Charger Interface) driver * * Copyright (C) 2010 Gražvydas Ignotas <[email protected]> * * based on twl4030_bci_battery.c by TI * Copyright (C) 2008 Texas Instruments, Inc. */ #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/mfd/twl.h> #include <linux/power_supply.h> #include <linux/notifier.h> #include <linux/usb/otg.h> #include <linux/iio/consumer.h> #define TWL4030_BCIMDEN … #define TWL4030_BCIMDKEY … #define TWL4030_BCIMSTATEC … #define TWL4030_BCIICHG … #define TWL4030_BCIVAC … #define TWL4030_BCIVBUS … #define TWL4030_BCIMFSTS3 … #define TWL4030_BCIMFSTS4 … #define TWL4030_BCICTL1 … #define TWL4030_BB_CFG … #define TWL4030_BCIIREF1 … #define TWL4030_BCIIREF2 … #define TWL4030_BCIMFKEY … #define TWL4030_BCIMFEN3 … #define TWL4030_BCIMFTH8 … #define TWL4030_BCIMFTH9 … #define TWL4030_BCIWDKEY … #define TWL4030_BCIMFSTS1 … #define TWL4030_BCIAUTOWEN … #define TWL4030_CONFIG_DONE … #define TWL4030_CVENAC … #define TWL4030_BCIAUTOUSB … #define TWL4030_BCIAUTOAC … #define TWL4030_CGAIN … #define TWL4030_USBFASTMCHG … #define TWL4030_STS_VBUS … #define TWL4030_STS_USB_ID … #define TWL4030_BBCHEN … #define TWL4030_BBSEL_MASK … #define TWL4030_BBSEL_2V5 … #define TWL4030_BBSEL_3V0 … #define TWL4030_BBSEL_3V1 … #define TWL4030_BBSEL_3V2 … #define TWL4030_BBISEL_MASK … #define TWL4030_BBISEL_25uA … #define TWL4030_BBISEL_150uA … #define TWL4030_BBISEL_500uA … #define TWL4030_BBISEL_1000uA … #define TWL4030_BATSTSPCHG … #define TWL4030_BATSTSMCHG … /* BCI interrupts */ #define TWL4030_WOVF … #define TWL4030_TMOVF … #define TWL4030_ICHGHIGH … #define TWL4030_ICHGLOW … #define TWL4030_ICHGEOC … #define TWL4030_TBATOR2 … #define TWL4030_TBATOR1 … #define TWL4030_BATSTS … #define TWL4030_VBATLVL … #define TWL4030_VBATOV … #define TWL4030_VBUSOV … #define TWL4030_ACCHGOV … #define TWL4030_MSTATEC_USB … #define TWL4030_MSTATEC_AC … #define TWL4030_MSTATEC_MASK … #define TWL4030_MSTATEC_QUICK1 … #define TWL4030_MSTATEC_QUICK7 … #define TWL4030_MSTATEC_COMPLETE1 … #define TWL4030_MSTATEC_COMPLETE4 … /* * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) * then AC is available. */ static inline int ac_available(struct iio_channel *channel_vac) { … } static bool allow_usb; module_param(allow_usb, bool, 0644); MODULE_PARM_DESC(…) …; struct twl4030_bci { … }; /* strings for 'usb_mode' values */ static const char *modes[] = …; /* * 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) { … } static int twl4030_bci_read(u8 reg, u8 *val) { … } static int twl4030_clear_set_boot_bci(u8 clear, u8 set) { … } static int twl4030bci_read_adc_val(u8 reg) { … } /* * 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 * 1000 * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 */ /* * convert twl register value for currents into uA */ static int regval2ua(int regval, bool cgain) { … } /* * convert uA currents into twl register value */ static int ua2regval(int ua, bool cgain) { … } static int twl4030_charger_update_current(struct twl4030_bci *bci) { … } static int twl4030_charger_get_current(void); static void twl4030_current_worker(struct work_struct *data) { … } /* * Enable/Disable USB Charge functionality. */ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) { … } /* * Enable/Disable AC Charge funtionality. */ static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable) { … } /* * Enable/Disable charging of Backup Battery. */ static int twl4030_charger_enable_backup(int uvolt, int uamp) { … } /* * TWL4030 CHG_PRES (AC charger presence) events */ static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) { … } /* * TWL4030 BCI monitoring events */ static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) { … } static void twl4030_bci_usb_work(struct work_struct *data) { … } static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, void *priv) { … } /* * sysfs charger enabled store */ static ssize_t twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { … } /* * sysfs charger enabled show */ static ssize_t twl4030_bci_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show, twl4030_bci_mode_store); static int twl4030_charger_get_current(void) { … } /* * Returns the main charge FSM state * Or < 0 on failure. */ static int twl4030bci_state(struct twl4030_bci *bci) { … } static int twl4030_bci_state_to_status(int state) { … } static int twl4030_bci_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int twl4030_bci_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { … } static int twl4030_bci_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { … } static enum power_supply_property twl4030_charger_props[] = …; #ifdef CONFIG_OF static const struct twl4030_bci_platform_data * twl4030_bci_parse_dt(struct device *dev) { … } #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 = …; static const struct power_supply_desc twl4030_bci_usb_desc = …; static int twl4030_bci_probe(struct platform_device *pdev) { … } static void twl4030_bci_remove(struct platform_device *pdev) { … } static const struct of_device_id twl_bci_of_match[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, twl_bci_of_match); static struct platform_driver twl4030_bci_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux