// SPDX-License-Identifier: GPL-2.0+ // // RTC driver for Maxim MAX77686 and MAX77802 // // Copyright (C) 2012 Samsung Electronics Co.Ltd // // based on rtc-max8997.c #include <linux/i2c.h> #include <linux/slab.h> #include <linux/rtc.h> #include <linux/delay.h> #include <linux/mutex.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/mfd/max77686-private.h> #include <linux/irqdomain.h> #include <linux/regmap.h> #define MAX77686_I2C_ADDR_RTC … #define MAX77620_I2C_ADDR_RTC … #define MAX77714_I2C_ADDR_RTC … #define MAX77686_INVALID_I2C_ADDR … /* Define non existing register */ #define MAX77686_INVALID_REG … /* RTC Control Register */ #define BCD_EN_SHIFT … #define BCD_EN_MASK … #define MODEL24_SHIFT … #define MODEL24_MASK … /* RTC Update Register1 */ #define RTC_UDR_SHIFT … #define RTC_UDR_MASK … #define RTC_RBUDR_SHIFT … #define RTC_RBUDR_MASK … /* RTC Alarm Enable */ #define ALARM_ENABLE_SHIFT … #define ALARM_ENABLE_MASK … #define REG_RTC_NONE … /* * MAX77802 has separate register (RTCAE1) for alarm enable instead * using 1 bit from registers RTC{SEC,MIN,HOUR,DAY,MONTH,YEAR,DATE} * as in done in MAX77686. */ #define MAX77802_ALARM_ENABLE_VALUE … enum { … }; /** * struct max77686_rtc_driver_data - model-specific configuration * @delay: Minimum usecs needed for a RTC update * @mask: Mask used to read RTC registers value * @map: Registers offset to I2C addresses map * @alarm_enable_reg: Has a separate alarm enable register? * @rtc_i2c_addr: I2C address for RTC block * @rtc_irq_from_platform: RTC interrupt via platform resource * @alarm_pending_status_reg: Pending alarm status register * @rtc_irq_chip: RTC IRQ CHIP for regmap * @regmap_config: regmap configuration for the chip */ struct max77686_rtc_driver_data { … }; struct max77686_rtc_info { … }; enum MAX77686_RTC_OP { … }; /* These are not registers but just offsets that are mapped to addresses */ enum max77686_rtc_reg_offset { … }; /* Maps RTC registers offset to the MAX77686 register addresses */ static const unsigned int max77686_map[REG_RTC_END] = …; static const struct regmap_irq max77686_rtc_irqs[] = …; static const struct regmap_irq_chip max77686_rtc_irq_chip = …; static const struct regmap_config max77686_rtc_regmap_config = …; static const struct max77686_rtc_driver_data max77686_drv_data = …; static const struct regmap_irq_chip max77714_rtc_irq_chip = …; static const struct max77686_rtc_driver_data max77714_drv_data = …; static const struct regmap_config max77620_rtc_regmap_config = …; static const struct max77686_rtc_driver_data max77620_drv_data = …; static const unsigned int max77802_map[REG_RTC_END] = …; static const struct regmap_irq_chip max77802_rtc_irq_chip = …; static const struct max77686_rtc_driver_data max77802_drv_data = …; static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, struct max77686_rtc_info *info) { … } static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data, struct max77686_rtc_info *info) { … } static int max77686_rtc_update(struct max77686_rtc_info *info, enum MAX77686_RTC_OP op) { … } static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) { … } static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) { … } static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int max77686_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) { … } static const struct rtc_class_ops max77686_rtc_ops = …; static int max77686_rtc_init_reg(struct max77686_rtc_info *info) { … } static int max77686_init_rtc_regmap(struct max77686_rtc_info *info) { … } static int max77686_rtc_probe(struct platform_device *pdev) { … } static void max77686_rtc_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int max77686_rtc_suspend(struct device *dev) { … } static int max77686_rtc_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops, max77686_rtc_suspend, max77686_rtc_resume); static const struct platform_device_id rtc_id[] = …; MODULE_DEVICE_TABLE(platform, rtc_id); static struct platform_driver max77686_rtc_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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