linux/drivers/rtc/rtc-isl12026.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * An I2C driver for the Intersil ISL 12026
 *
 * Copyright (c) 2018 Cavium, Inc.
 */
#include <linux/bcd.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/rtc.h>
#include <linux/slab.h>

/* register offsets */
#define ISL12026_REG_PWR …
#define ISL12026_REG_PWR_BSW …
#define ISL12026_REG_PWR_SBIB …
#define ISL12026_REG_SC …
#define ISL12026_REG_HR …
#define ISL12026_REG_HR_MIL …
#define ISL12026_REG_SR …
#define ISL12026_REG_SR_RTCF …
#define ISL12026_REG_SR_WEL …
#define ISL12026_REG_SR_RWEL …
#define ISL12026_REG_SR_MBZ …
#define ISL12026_REG_SR_OSCF …

/* The EEPROM array responds at i2c address 0x57 */
#define ISL12026_EEPROM_ADDR …

#define ISL12026_PAGESIZE …
#define ISL12026_NVMEM_WRITE_TIME …

struct isl12026 { … };

static int isl12026_read_reg(struct i2c_client *client, int reg)
{ … }

static int isl12026_arm_write(struct i2c_client *client)
{ … }

static int isl12026_disarm_write(struct i2c_client *client)
{ … }

static int isl12026_write_reg(struct i2c_client *client, int reg, u8 val)
{ … }

static int isl12026_rtc_set_time(struct device *dev, struct rtc_time *tm)
{ … }

static int isl12026_rtc_read_time(struct device *dev, struct rtc_time *tm)
{ … }

static const struct rtc_class_ops isl12026_rtc_ops = …;

static int isl12026_nvm_read(void *p, unsigned int offset,
			     void *val, size_t bytes)
{ … }

static int isl12026_nvm_write(void *p, unsigned int offset,
			      void *val, size_t bytes)
{ … }

static void isl12026_force_power_modes(struct i2c_client *client)
{ … }

static int isl12026_probe(struct i2c_client *client)
{ … }

static void isl12026_remove(struct i2c_client *client)
{ … }

static const struct of_device_id isl12026_dt_match[] = …;
MODULE_DEVICE_TABLE(of, isl12026_dt_match);

static struct i2c_driver isl12026_driver = …;

module_i2c_driver(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;