// SPDX-License-Identifier: GPL-2.0-only /* drivers/rtc/rtc-rx4581.c * * written by Torben Hohn <[email protected]> * * Based on: * drivers/rtc/rtc-max6902.c * * Copyright (C) 2006 8D Technologies inc. * Copyright (C) 2004 Compulab Ltd. * * Driver for MAX6902 spi RTC * * and based on: * drivers/rtc/rtc-rx8581.c * * 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/kernel.h> #include <linux/platform_device.h> #include <linux/init.h> #include <linux/rtc.h> #include <linux/spi/spi.h> #include <linux/bcd.h> #define RX4581_REG_SC … #define RX4581_REG_MN … #define RX4581_REG_HR … #define RX4581_REG_DW … #define RX4581_REG_DM … #define RX4581_REG_MO … #define RX4581_REG_YR … #define RX4581_REG_RAM … #define RX4581_REG_AMN … #define RX4581_REG_AHR … #define RX4581_REG_ADM … #define RX4581_REG_ADW … #define RX4581_REG_TMR0 … #define RX4581_REG_TMR1 … #define RX4581_REG_EXT … #define RX4581_REG_FLAG … #define RX4581_REG_CTRL … /* Flag Register bit definitions */ #define RX4581_FLAG_UF … #define RX4581_FLAG_TF … #define RX4581_FLAG_AF … #define RX4581_FLAG_VLF … /* Control Register bit definitions */ #define RX4581_CTRL_UIE … #define RX4581_CTRL_TIE … #define RX4581_CTRL_AIE … #define RX4581_CTRL_STOP … #define RX4581_CTRL_RESET … static int rx4581_set_reg(struct device *dev, unsigned char address, unsigned char data) { … } static int rx4581_get_reg(struct device *dev, unsigned char address, unsigned char *data) { … } /* * 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 rx4581_get_datetime(struct device *dev, struct rtc_time *tm) { … } static int rx4581_set_datetime(struct device *dev, struct rtc_time *tm) { … } static const struct rtc_class_ops rx4581_rtc_ops = …; static int rx4581_probe(struct spi_device *spi) { … } static const struct spi_device_id rx4581_id[] = …; MODULE_DEVICE_TABLE(spi, rx4581_id); static struct spi_driver rx4581_driver = …; module_spi_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux