// SPDX-License-Identifier: GPL-2.0-only /* * Motorola CPCAP PMIC battery charger driver * * Copyright (C) 2017 Tony Lindgren <[email protected]> * * Rewritten for Linux power framework with some parts based on * earlier driver found in the Motorola Linux kernel: * * Copyright (C) 2009-2010 Motorola, Inc. */ #include <linux/atomic.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/notifier.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/regmap.h> #include <linux/gpio/consumer.h> #include <linux/usb/phy_companion.h> #include <linux/phy/omap_usb.h> #include <linux/usb/otg.h> #include <linux/iio/consumer.h> #include <linux/mfd/motorola-cpcap.h> /* * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware, * see NXP "MC13783 Power Management and Audio Circuit Users's Guide" * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers * and values for CPCAP are different, but some of the internal components seem * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1 * bits that seem to describe the CRM register. */ #define CPCAP_REG_CRM_UNUSED_641_15 … #define CPCAP_REG_CRM_UNUSED_641_14 … #define CPCAP_REG_CRM_CHRG_LED_EN … #define CPCAP_REG_CRM_RVRSMODE … #define CPCAP_REG_CRM_ICHRG_TR1 … #define CPCAP_REG_CRM_ICHRG_TR0 … #define CPCAP_REG_CRM_FET_OVRD … #define CPCAP_REG_CRM_FET_CTRL … #define CPCAP_REG_CRM_VCHRG3 … #define CPCAP_REG_CRM_VCHRG2 … #define CPCAP_REG_CRM_VCHRG1 … #define CPCAP_REG_CRM_VCHRG0 … #define CPCAP_REG_CRM_ICHRG3 … #define CPCAP_REG_CRM_ICHRG2 … #define CPCAP_REG_CRM_ICHRG1 … #define CPCAP_REG_CRM_ICHRG0 … /* CPCAP_REG_CRM trickle charge voltages */ #define CPCAP_REG_CRM_TR(val) … #define CPCAP_REG_CRM_TR_0A00 … #define CPCAP_REG_CRM_TR_0A24 … #define CPCAP_REG_CRM_TR_0A48 … #define CPCAP_REG_CRM_TR_0A72 … /* * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values. * Note that these register bits don't match MC13783UG.pdf VCHRG * register bits. */ #define CPCAP_REG_CRM_VCHRG(val) … #define CPCAP_REG_CRM_VCHRG_3V80 … #define CPCAP_REG_CRM_VCHRG_4V10 … #define CPCAP_REG_CRM_VCHRG_4V12 … #define CPCAP_REG_CRM_VCHRG_4V15 … #define CPCAP_REG_CRM_VCHRG_4V17 … #define CPCAP_REG_CRM_VCHRG_4V20 … #define CPCAP_REG_CRM_VCHRG_4V23 … #define CPCAP_REG_CRM_VCHRG_4V25 … #define CPCAP_REG_CRM_VCHRG_4V27 … #define CPCAP_REG_CRM_VCHRG_4V30 … #define CPCAP_REG_CRM_VCHRG_4V33 … #define CPCAP_REG_CRM_VCHRG_4V35 … #define CPCAP_REG_CRM_VCHRG_4V38 … #define CPCAP_REG_CRM_VCHRG_4V40 … #define CPCAP_REG_CRM_VCHRG_4V42 … #define CPCAP_REG_CRM_VCHRG_4V44 … /* * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf * values in "Table 8-3. Charge Path Regulator Current Limit * Characteristics" for the nominal values. * * Except 70mA and 1.596A and unlimited, these are simply 88.7mA / step. */ #define CPCAP_REG_CRM_ICHRG(val) … #define CPCAP_REG_CRM_ICHRG_0A000 … #define CPCAP_REG_CRM_ICHRG_0A070 … #define CPCAP_REG_CRM_ICHRG_0A177 … #define CPCAP_REG_CRM_ICHRG_0A266 … #define CPCAP_REG_CRM_ICHRG_0A355 … #define CPCAP_REG_CRM_ICHRG_0A443 … #define CPCAP_REG_CRM_ICHRG_0A532 … #define CPCAP_REG_CRM_ICHRG_0A621 … #define CPCAP_REG_CRM_ICHRG_0A709 … #define CPCAP_REG_CRM_ICHRG_0A798 … #define CPCAP_REG_CRM_ICHRG_0A886 … #define CPCAP_REG_CRM_ICHRG_0A975 … #define CPCAP_REG_CRM_ICHRG_1A064 … #define CPCAP_REG_CRM_ICHRG_1A152 … #define CPCAP_REG_CRM_ICHRG_1A596 … #define CPCAP_REG_CRM_ICHRG_NO_LIMIT … /* CPCAP_REG_VUSBC register bits needed for VBUS */ #define CPCAP_BIT_VBUS_SWITCH … enum { … }; struct cpcap_charger_ddata { … }; struct cpcap_interrupt_desc { … }; struct cpcap_charger_ints_state { … }; static enum power_supply_property cpcap_charger_props[] = …; static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata) { … } static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata) { … } static int cpcap_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static int cpcap_charger_match_voltage(int voltage) { … } static int cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata) { … } static int cpcap_charger_current_to_regval(int microamp) { … } static int cpcap_charger_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { … } static int cpcap_charger_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { … } static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata, bool enabled) { … } static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata, bool enabled) { … } static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata, int state) { … } static int cpcap_charger_disable(struct cpcap_charger_ddata *ddata) { … } static int cpcap_charger_enable(struct cpcap_charger_ddata *ddata, int max_voltage, int charge_current, int trickle_current) { … } static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata) { … } /* VBUS control functions for the USB PHY companion */ static void cpcap_charger_vbus_work(struct work_struct *work) { … } static int cpcap_charger_set_vbus(struct phy_companion *comparator, bool enabled) { … } /* Charger interrupt handling functions */ static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, struct cpcap_charger_ints_state *s) { … } static int cpcap_charger_voltage_to_regval(int voltage) { … } static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata, int state, unsigned long delay) { … } static void cpcap_usb_detect(struct work_struct *work) { … } static irqreturn_t cpcap_charger_irq_thread(int irq, void *data) { … } static int cpcap_usb_init_irq(struct platform_device *pdev, struct cpcap_charger_ddata *ddata, const char *name) { … } static const char * const cpcap_charger_irqs[] = …; static int cpcap_usb_init_interrupts(struct platform_device *pdev, struct cpcap_charger_ddata *ddata) { … } static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata) { … } static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata) { … } static char *cpcap_charger_supplied_to[] = …; static const struct power_supply_desc cpcap_charger_usb_desc = …; static const struct of_device_id cpcap_charger_id_table[] = …; MODULE_DEVICE_TABLE(of, cpcap_charger_id_table); static int cpcap_charger_probe(struct platform_device *pdev) { … } static void cpcap_charger_shutdown(struct platform_device *pdev) { … } static void cpcap_charger_remove(struct platform_device *pdev) { … } static struct platform_driver cpcap_charger_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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