// SPDX-License-Identifier: GPL-2.0-only /* * An i2c driver for the Xicor/Intersil X1205 RTC * Copyright 2004 Karen Spearel * Copyright 2005 Alessandro Zummo * * please send all reports to: * Karen Spearel <kas111 at gmail dot com> * Alessandro Zummo <[email protected]> * * based on a lot of other RTC drivers. * * Information and datasheet: * http://www.intersil.com/cda/deviceinfo/0,1477,X1205,00.html */ #include <linux/i2c.h> #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/bitops.h> /* offsets into CCR area */ #define CCR_SEC … #define CCR_MIN … #define CCR_HOUR … #define CCR_MDAY … #define CCR_MONTH … #define CCR_YEAR … #define CCR_WDAY … #define CCR_Y2K … #define X1205_REG_SR … #define X1205_REG_Y2K … #define X1205_REG_DW … #define X1205_REG_YR … #define X1205_REG_MO … #define X1205_REG_DT … #define X1205_REG_HR … #define X1205_REG_MN … #define X1205_REG_SC … #define X1205_REG_DTR … #define X1205_REG_ATR … #define X1205_REG_INT … #define X1205_REG_0 … #define X1205_REG_Y2K1 … #define X1205_REG_DWA1 … #define X1205_REG_YRA1 … #define X1205_REG_MOA1 … #define X1205_REG_DTA1 … #define X1205_REG_HRA1 … #define X1205_REG_MNA1 … #define X1205_REG_SCA1 … #define X1205_REG_Y2K0 … #define X1205_REG_DWA0 … #define X1205_REG_YRA0 … #define X1205_REG_MOA0 … #define X1205_REG_DTA0 … #define X1205_REG_HRA0 … #define X1205_REG_MNA0 … #define X1205_REG_SCA0 … #define X1205_CCR_BASE … #define X1205_ALM0_BASE … #define X1205_SR_RTCF … #define X1205_SR_WEL … #define X1205_SR_RWEL … #define X1205_SR_AL0 … #define X1205_DTR_DTR0 … #define X1205_DTR_DTR1 … #define X1205_DTR_DTR2 … #define X1205_HR_MIL … #define X1205_INT_AL0E … static struct i2c_driver x1205_driver; /* * In the routines that deal directly with the x1205 hardware, we use * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch * Epoch is initialized as 2000. Time is set to UTC. */ static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, unsigned char reg_base) { … } static int x1205_get_status(struct i2c_client *client, unsigned char *sr) { … } static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, u8 reg_base, unsigned char alm_enable) { … } static int x1205_fix_osc(struct i2c_client *client) { … } static int x1205_get_dtrim(struct i2c_client *client, int *trim) { … } static int x1205_get_atrim(struct i2c_client *client, int *trim) { … } struct x1205_limit { … }; static int x1205_validate_client(struct i2c_client *client) { … } static int x1205_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int x1205_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int x1205_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } static int x1205_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } static int x1205_rtc_proc(struct device *dev, struct seq_file *seq) { … } static const struct rtc_class_ops x1205_rtc_ops = …; static ssize_t x1205_sysfs_show_atrim(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(atrim, S_IRUGO, x1205_sysfs_show_atrim, NULL); static ssize_t x1205_sysfs_show_dtrim(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(dtrim, S_IRUGO, x1205_sysfs_show_dtrim, NULL); static int x1205_sysfs_register(struct device *dev) { … } static void x1205_sysfs_unregister(struct device *dev) { … } static int x1205_probe(struct i2c_client *client) { … } static void x1205_remove(struct i2c_client *client) { … } static const struct i2c_device_id x1205_id[] = …; MODULE_DEVICE_TABLE(i2c, x1205_id); static const struct of_device_id x1205_dt_ids[] = …; MODULE_DEVICE_TABLE(of, x1205_dt_ids); static struct i2c_driver x1205_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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