// SPDX-License-Identifier: GPL-2.0-only /* * An I2C driver for the Epson RX8581 RTC * * Author: Martyn Welch <[email protected]> * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. * * Based on: rtc-pcf8563.c (An I2C driver for the Philips PCF8563 RTC) * Copyright 2005-06 Tower Technologies */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/bcd.h> #include <linux/of.h> #include <linux/regmap.h> #include <linux/rtc.h> #include <linux/log2.h> #define RX8581_REG_SC … #define RX8581_REG_MN … #define RX8581_REG_HR … #define RX8581_REG_DW … #define RX8581_REG_DM … #define RX8581_REG_MO … #define RX8581_REG_YR … #define RX8581_REG_RAM … #define RX8581_REG_AMN … #define RX8581_REG_AHR … #define RX8581_REG_ADM … #define RX8581_REG_ADW … #define RX8581_REG_TMR0 … #define RX8581_REG_TMR1 … #define RX8581_REG_EXT … #define RX8581_REG_FLAG … #define RX8581_REG_CTRL … /* Flag Register bit definitions */ #define RX8581_FLAG_UF … #define RX8581_FLAG_TF … #define RX8581_FLAG_AF … #define RX8581_FLAG_VLF … /* Control Register bit definitions */ #define RX8581_CTRL_UIE … #define RX8581_CTRL_TIE … #define RX8581_CTRL_AIE … #define RX8581_CTRL_STOP … #define RX8581_CTRL_RESET … #define RX8571_USER_RAM … #define RX8571_NVRAM_SIZE … struct rx8581 { … }; struct rx85x1_config { … }; /* * In the routines that deal directly with the rx8581 hardware, we use * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. */ static int rx8581_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } static int rx8581_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } static const struct rtc_class_ops rx8581_rtc_ops = …; static int rx8571_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rx8571_nvram_write(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rx85x1_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { … } static int rx85x1_nvram_write(void *priv, unsigned int offset, void *val, size_t bytes) { … } static const struct rx85x1_config rx8581_config = …; static const struct rx85x1_config rx8571_config = …; static int rx8581_probe(struct i2c_client *client) { … } static const struct i2c_device_id rx8581_id[] = …; MODULE_DEVICE_TABLE(i2c, rx8581_id); static const __maybe_unused struct of_device_id rx8581_of_match[] = …; MODULE_DEVICE_TABLE(of, rx8581_of_match); static struct i2c_driver rx8581_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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