// SPDX-License-Identifier: GPL-2.0-only /* * Driver for the Epson RTC module RX-6110 SA * * Copyright(C) 2015 Pengutronix, Steffen Trumtrar <[email protected]> * Copyright(C) SEIKO EPSON CORPORATION 2013. All rights reserved. */ #include <linux/bcd.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/rtc.h> #include <linux/of.h> #include <linux/spi/spi.h> #include <linux/i2c.h> /* RX-6110 Register definitions */ #define RX6110_REG_SEC … #define RX6110_REG_MIN … #define RX6110_REG_HOUR … #define RX6110_REG_WDAY … #define RX6110_REG_MDAY … #define RX6110_REG_MONTH … #define RX6110_REG_YEAR … #define RX6110_REG_RES1 … #define RX6110_REG_ALMIN … #define RX6110_REG_ALHOUR … #define RX6110_REG_ALWDAY … #define RX6110_REG_TCOUNT0 … #define RX6110_REG_TCOUNT1 … #define RX6110_REG_EXT … #define RX6110_REG_FLAG … #define RX6110_REG_CTRL … #define RX6110_REG_USER0 … #define RX6110_REG_USER1 … #define RX6110_REG_USER2 … #define RX6110_REG_USER3 … #define RX6110_REG_USER4 … #define RX6110_REG_USER5 … #define RX6110_REG_USER6 … #define RX6110_REG_USER7 … #define RX6110_REG_USER8 … #define RX6110_REG_USER9 … #define RX6110_REG_USERA … #define RX6110_REG_USERB … #define RX6110_REG_USERC … #define RX6110_REG_USERD … #define RX6110_REG_USERE … #define RX6110_REG_USERF … #define RX6110_REG_RES2 … #define RX6110_REG_RES3 … #define RX6110_REG_IRQ … #define RX6110_BIT_ALARM_EN … /* Extension Register (1Dh) bit positions */ #define RX6110_BIT_EXT_TSEL0 … #define RX6110_BIT_EXT_TSEL1 … #define RX6110_BIT_EXT_TSEL2 … #define RX6110_BIT_EXT_WADA … #define RX6110_BIT_EXT_TE … #define RX6110_BIT_EXT_USEL … #define RX6110_BIT_EXT_FSEL0 … #define RX6110_BIT_EXT_FSEL1 … /* Flag Register (1Eh) bit positions */ #define RX6110_BIT_FLAG_VLF … #define RX6110_BIT_FLAG_AF … #define RX6110_BIT_FLAG_TF … #define RX6110_BIT_FLAG_UF … /* Control Register (1Fh) bit positions */ #define RX6110_BIT_CTRL_TBKE … #define RX6110_BIT_CTRL_TBKON … #define RX6110_BIT_CTRL_TSTP … #define RX6110_BIT_CTRL_AIE … #define RX6110_BIT_CTRL_TIE … #define RX6110_BIT_CTRL_UIE … #define RX6110_BIT_CTRL_STOP … #define RX6110_BIT_CTRL_TEST … enum { … }; #define RX6110_DRIVER_NAME … struct rx6110_data { … }; /** * rx6110_rtc_tm_to_data - convert rtc_time to native time encoding * * @tm: holds date and time * @data: holds the encoding in rx6110 native form */ static int rx6110_rtc_tm_to_data(struct rtc_time *tm, u8 *data) { … } /** * rx6110_data_to_rtc_tm - convert native time encoding to rtc_time * * @data: holds the encoding in rx6110 native form * @tm: holds date and time */ static int rx6110_data_to_rtc_tm(u8 *data, struct rtc_time *tm) { … } /** * rx6110_set_time - set the current time in the rx6110 registers * * @dev: the rtc device in use * @tm: holds date and time * * BUG: The HW assumes every year that is a multiple of 4 to be a leap * year. Next time this is wrong is 2100, which will not be a leap year * * Note: If STOP is not set/cleared, the clock will start when the seconds * register is written * */ static int rx6110_set_time(struct device *dev, struct rtc_time *tm) { … } /** * rx6110_get_time - get the current time from the rx6110 registers * @dev: the rtc device in use * @tm: holds date and time */ static int rx6110_get_time(struct device *dev, struct rtc_time *tm) { … } static const struct reg_sequence rx6110_default_regs[] = …; /** * rx6110_init - initialize the rx6110 registers * * @rx6110: pointer to the rx6110 struct in use * */ static int rx6110_init(struct rx6110_data *rx6110) { … } static const struct rtc_class_ops rx6110_rtc_ops = …; static int rx6110_probe(struct rx6110_data *rx6110, struct device *dev) { … } #if IS_ENABLED(CONFIG_SPI_MASTER) static const struct regmap_config regmap_spi_config = …; /** * rx6110_spi_probe - initialize rtc driver * @spi: pointer to spi device */ static int rx6110_spi_probe(struct spi_device *spi) { … } static const struct spi_device_id rx6110_spi_id[] = …; MODULE_DEVICE_TABLE(spi, rx6110_spi_id); static const __maybe_unused struct of_device_id rx6110_spi_of_match[] = …; MODULE_DEVICE_TABLE(of, rx6110_spi_of_match); static struct spi_driver rx6110_spi_driver = …; static int rx6110_spi_register(void) { … } static void rx6110_spi_unregister(void) { … } #else static int rx6110_spi_register(void) { return 0; } static void rx6110_spi_unregister(void) { } #endif /* CONFIG_SPI_MASTER */ #if IS_ENABLED(CONFIG_I2C) static const struct regmap_config regmap_i2c_config = …; static int rx6110_i2c_probe(struct i2c_client *client) { … } static const struct acpi_device_id rx6110_i2c_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, rx6110_i2c_acpi_match); static const struct i2c_device_id rx6110_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, rx6110_i2c_id); static struct i2c_driver rx6110_i2c_driver = …; static int rx6110_i2c_register(void) { … } static void rx6110_i2c_unregister(void) { … } #else static int rx6110_i2c_register(void) { return 0; } static void rx6110_i2c_unregister(void) { } #endif /* CONFIG_I2C */ static int __init rx6110_module_init(void) { … } module_init(…) …; static void __exit rx6110_module_exit(void) { … } module_exit(rx6110_module_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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