mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 18:46:43 +07:00
1cd713762e
There might be designs where the power supply circuit is designed in a way that VDETOFF and SWOFF is required to be set. Otherwise the RTC detects a power loss. Add a device tree interface for this. Signed-off-by: Carsten Resch <Carsten.Resch@de.bosch.com> Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Oleksij Rempel <fixed-term.Oleksij.Rempel@de.bosch.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
643 lines
15 KiB
C
643 lines
15 KiB
C
/*
|
|
* RTC driver for the Micro Crystal RV8803
|
|
*
|
|
* Copyright (C) 2015 Micro Crystal SA
|
|
*
|
|
* Alexandre Belloni <alexandre.belloni@free-electrons.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/bcd.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/log2.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/rtc.h>
|
|
|
|
#define RV8803_I2C_TRY_COUNT 4
|
|
|
|
#define RV8803_SEC 0x00
|
|
#define RV8803_MIN 0x01
|
|
#define RV8803_HOUR 0x02
|
|
#define RV8803_WEEK 0x03
|
|
#define RV8803_DAY 0x04
|
|
#define RV8803_MONTH 0x05
|
|
#define RV8803_YEAR 0x06
|
|
#define RV8803_RAM 0x07
|
|
#define RV8803_ALARM_MIN 0x08
|
|
#define RV8803_ALARM_HOUR 0x09
|
|
#define RV8803_ALARM_WEEK_OR_DAY 0x0A
|
|
#define RV8803_EXT 0x0D
|
|
#define RV8803_FLAG 0x0E
|
|
#define RV8803_CTRL 0x0F
|
|
|
|
#define RV8803_EXT_WADA BIT(6)
|
|
|
|
#define RV8803_FLAG_V1F BIT(0)
|
|
#define RV8803_FLAG_V2F BIT(1)
|
|
#define RV8803_FLAG_AF BIT(3)
|
|
#define RV8803_FLAG_TF BIT(4)
|
|
#define RV8803_FLAG_UF BIT(5)
|
|
|
|
#define RV8803_CTRL_RESET BIT(0)
|
|
|
|
#define RV8803_CTRL_EIE BIT(2)
|
|
#define RV8803_CTRL_AIE BIT(3)
|
|
#define RV8803_CTRL_TIE BIT(4)
|
|
#define RV8803_CTRL_UIE BIT(5)
|
|
|
|
#define RX8900_BACKUP_CTRL 0x18
|
|
#define RX8900_FLAG_SWOFF BIT(2)
|
|
#define RX8900_FLAG_VDETOFF BIT(3)
|
|
|
|
enum rv8803_type {
|
|
rv_8803,
|
|
rx_8900
|
|
};
|
|
|
|
struct rv8803_data {
|
|
struct i2c_client *client;
|
|
struct rtc_device *rtc;
|
|
struct mutex flags_lock;
|
|
u8 ctrl;
|
|
enum rv8803_type type;
|
|
};
|
|
|
|
static int rv8803_read_reg(const struct i2c_client *client, u8 reg)
|
|
{
|
|
int try = RV8803_I2C_TRY_COUNT;
|
|
s32 ret;
|
|
|
|
/*
|
|
* There is a 61µs window during which the RTC does not acknowledge I2C
|
|
* transfers. In that case, ensure that there are multiple attempts.
|
|
*/
|
|
do
|
|
ret = i2c_smbus_read_byte_data(client, reg);
|
|
while ((ret == -ENXIO || ret == -EIO) && --try);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "Unable to read register 0x%02x\n", reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rv8803_read_regs(const struct i2c_client *client,
|
|
u8 reg, u8 count, u8 *values)
|
|
{
|
|
int try = RV8803_I2C_TRY_COUNT;
|
|
s32 ret;
|
|
|
|
do
|
|
ret = i2c_smbus_read_i2c_block_data(client, reg, count, values);
|
|
while ((ret == -ENXIO || ret == -EIO) && --try);
|
|
if (ret != count) {
|
|
dev_err(&client->dev,
|
|
"Unable to read registers 0x%02x..0x%02x\n",
|
|
reg, reg + count - 1);
|
|
return ret < 0 ? ret : -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_write_reg(const struct i2c_client *client, u8 reg, u8 value)
|
|
{
|
|
int try = RV8803_I2C_TRY_COUNT;
|
|
s32 ret;
|
|
|
|
do
|
|
ret = i2c_smbus_write_byte_data(client, reg, value);
|
|
while ((ret == -ENXIO || ret == -EIO) && --try);
|
|
if (ret)
|
|
dev_err(&client->dev, "Unable to write register 0x%02x\n", reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rv8803_write_regs(const struct i2c_client *client,
|
|
u8 reg, u8 count, const u8 *values)
|
|
{
|
|
int try = RV8803_I2C_TRY_COUNT;
|
|
s32 ret;
|
|
|
|
do
|
|
ret = i2c_smbus_write_i2c_block_data(client, reg, count,
|
|
values);
|
|
while ((ret == -ENXIO || ret == -EIO) && --try);
|
|
if (ret)
|
|
dev_err(&client->dev,
|
|
"Unable to write registers 0x%02x..0x%02x\n",
|
|
reg, reg + count - 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t rv8803_handle_irq(int irq, void *dev_id)
|
|
{
|
|
struct i2c_client *client = dev_id;
|
|
struct rv8803_data *rv8803 = i2c_get_clientdata(client);
|
|
unsigned long events = 0;
|
|
int flags;
|
|
|
|
mutex_lock(&rv8803->flags_lock);
|
|
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags <= 0) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if (flags & RV8803_FLAG_V1F)
|
|
dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n");
|
|
|
|
if (flags & RV8803_FLAG_V2F)
|
|
dev_warn(&client->dev, "Voltage low, data loss detected.\n");
|
|
|
|
if (flags & RV8803_FLAG_TF) {
|
|
flags &= ~RV8803_FLAG_TF;
|
|
rv8803->ctrl &= ~RV8803_CTRL_TIE;
|
|
events |= RTC_PF;
|
|
}
|
|
|
|
if (flags & RV8803_FLAG_AF) {
|
|
flags &= ~RV8803_FLAG_AF;
|
|
rv8803->ctrl &= ~RV8803_CTRL_AIE;
|
|
events |= RTC_AF;
|
|
}
|
|
|
|
if (flags & RV8803_FLAG_UF) {
|
|
flags &= ~RV8803_FLAG_UF;
|
|
rv8803->ctrl &= ~RV8803_CTRL_UIE;
|
|
events |= RTC_UF;
|
|
}
|
|
|
|
if (events) {
|
|
rtc_update_irq(rv8803->rtc, 1, events);
|
|
rv8803_write_reg(client, RV8803_FLAG, flags);
|
|
rv8803_write_reg(rv8803->client, RV8803_CTRL, rv8803->ctrl);
|
|
}
|
|
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int rv8803_get_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
u8 date1[7];
|
|
u8 date2[7];
|
|
u8 *date = date1;
|
|
int ret, flags;
|
|
|
|
flags = rv8803_read_reg(rv8803->client, RV8803_FLAG);
|
|
if (flags < 0)
|
|
return flags;
|
|
|
|
if (flags & RV8803_FLAG_V2F) {
|
|
dev_warn(dev, "Voltage low, data is invalid.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = rv8803_read_regs(rv8803->client, RV8803_SEC, 7, date);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((date1[RV8803_SEC] & 0x7f) == bin2bcd(59)) {
|
|
ret = rv8803_read_regs(rv8803->client, RV8803_SEC, 7, date2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((date2[RV8803_SEC] & 0x7f) != bin2bcd(59))
|
|
date = date2;
|
|
}
|
|
|
|
tm->tm_sec = bcd2bin(date[RV8803_SEC] & 0x7f);
|
|
tm->tm_min = bcd2bin(date[RV8803_MIN] & 0x7f);
|
|
tm->tm_hour = bcd2bin(date[RV8803_HOUR] & 0x3f);
|
|
tm->tm_wday = ilog2(date[RV8803_WEEK] & 0x7f);
|
|
tm->tm_mday = bcd2bin(date[RV8803_DAY] & 0x3f);
|
|
tm->tm_mon = bcd2bin(date[RV8803_MONTH] & 0x1f) - 1;
|
|
tm->tm_year = bcd2bin(date[RV8803_YEAR]) + 100;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_set_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
u8 date[7];
|
|
int ctrl, flags, ret;
|
|
|
|
if ((tm->tm_year < 100) || (tm->tm_year > 199))
|
|
return -EINVAL;
|
|
|
|
ctrl = rv8803_read_reg(rv8803->client, RV8803_CTRL);
|
|
if (ctrl < 0)
|
|
return ctrl;
|
|
|
|
/* Stop the clock */
|
|
ret = rv8803_write_reg(rv8803->client, RV8803_CTRL,
|
|
ctrl | RV8803_CTRL_RESET);
|
|
if (ret)
|
|
return ret;
|
|
|
|
date[RV8803_SEC] = bin2bcd(tm->tm_sec);
|
|
date[RV8803_MIN] = bin2bcd(tm->tm_min);
|
|
date[RV8803_HOUR] = bin2bcd(tm->tm_hour);
|
|
date[RV8803_WEEK] = 1 << (tm->tm_wday);
|
|
date[RV8803_DAY] = bin2bcd(tm->tm_mday);
|
|
date[RV8803_MONTH] = bin2bcd(tm->tm_mon + 1);
|
|
date[RV8803_YEAR] = bin2bcd(tm->tm_year - 100);
|
|
|
|
ret = rv8803_write_regs(rv8803->client, RV8803_SEC, 7, date);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Restart the clock */
|
|
ret = rv8803_write_reg(rv8803->client, RV8803_CTRL,
|
|
ctrl & ~RV8803_CTRL_RESET);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&rv8803->flags_lock);
|
|
|
|
flags = rv8803_read_reg(rv8803->client, RV8803_FLAG);
|
|
if (flags < 0) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return flags;
|
|
}
|
|
|
|
ret = rv8803_write_reg(rv8803->client, RV8803_FLAG,
|
|
flags & ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F));
|
|
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rv8803_get_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
|
{
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
struct i2c_client *client = rv8803->client;
|
|
u8 alarmvals[3];
|
|
int flags, ret;
|
|
|
|
ret = rv8803_read_regs(client, RV8803_ALARM_MIN, 3, alarmvals);
|
|
if (ret)
|
|
return ret;
|
|
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags < 0)
|
|
return flags;
|
|
|
|
alrm->time.tm_sec = 0;
|
|
alrm->time.tm_min = bcd2bin(alarmvals[0] & 0x7f);
|
|
alrm->time.tm_hour = bcd2bin(alarmvals[1] & 0x3f);
|
|
alrm->time.tm_mday = bcd2bin(alarmvals[2] & 0x3f);
|
|
|
|
alrm->enabled = !!(rv8803->ctrl & RV8803_CTRL_AIE);
|
|
alrm->pending = (flags & RV8803_FLAG_AF) && alrm->enabled;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
u8 alarmvals[3];
|
|
u8 ctrl[2];
|
|
int ret, err;
|
|
|
|
/* The alarm has no seconds, round up to nearest minute */
|
|
if (alrm->time.tm_sec) {
|
|
time64_t alarm_time = rtc_tm_to_time64(&alrm->time);
|
|
|
|
alarm_time += 60 - alrm->time.tm_sec;
|
|
rtc_time64_to_tm(alarm_time, &alrm->time);
|
|
}
|
|
|
|
mutex_lock(&rv8803->flags_lock);
|
|
|
|
ret = rv8803_read_regs(client, RV8803_FLAG, 2, ctrl);
|
|
if (ret) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return ret;
|
|
}
|
|
|
|
alarmvals[0] = bin2bcd(alrm->time.tm_min);
|
|
alarmvals[1] = bin2bcd(alrm->time.tm_hour);
|
|
alarmvals[2] = bin2bcd(alrm->time.tm_mday);
|
|
|
|
if (rv8803->ctrl & (RV8803_CTRL_AIE | RV8803_CTRL_UIE)) {
|
|
rv8803->ctrl &= ~(RV8803_CTRL_AIE | RV8803_CTRL_UIE);
|
|
err = rv8803_write_reg(rv8803->client, RV8803_CTRL,
|
|
rv8803->ctrl);
|
|
if (err) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
ctrl[1] &= ~RV8803_FLAG_AF;
|
|
err = rv8803_write_reg(rv8803->client, RV8803_FLAG, ctrl[1]);
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rv8803_write_regs(rv8803->client, RV8803_ALARM_MIN, 3, alarmvals);
|
|
if (err)
|
|
return err;
|
|
|
|
if (alrm->enabled) {
|
|
if (rv8803->rtc->uie_rtctimer.enabled)
|
|
rv8803->ctrl |= RV8803_CTRL_UIE;
|
|
if (rv8803->rtc->aie_timer.enabled)
|
|
rv8803->ctrl |= RV8803_CTRL_AIE;
|
|
|
|
err = rv8803_write_reg(rv8803->client, RV8803_CTRL,
|
|
rv8803->ctrl);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_alarm_irq_enable(struct device *dev, unsigned int enabled)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
int ctrl, flags, err;
|
|
|
|
ctrl = rv8803->ctrl;
|
|
|
|
if (enabled) {
|
|
if (rv8803->rtc->uie_rtctimer.enabled)
|
|
ctrl |= RV8803_CTRL_UIE;
|
|
if (rv8803->rtc->aie_timer.enabled)
|
|
ctrl |= RV8803_CTRL_AIE;
|
|
} else {
|
|
if (!rv8803->rtc->uie_rtctimer.enabled)
|
|
ctrl &= ~RV8803_CTRL_UIE;
|
|
if (!rv8803->rtc->aie_timer.enabled)
|
|
ctrl &= ~RV8803_CTRL_AIE;
|
|
}
|
|
|
|
mutex_lock(&rv8803->flags_lock);
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags < 0) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return flags;
|
|
}
|
|
flags &= ~(RV8803_FLAG_AF | RV8803_FLAG_UF);
|
|
err = rv8803_write_reg(client, RV8803_FLAG, flags);
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
if (err)
|
|
return err;
|
|
|
|
if (ctrl != rv8803->ctrl) {
|
|
rv8803->ctrl = ctrl;
|
|
err = rv8803_write_reg(client, RV8803_CTRL, rv8803->ctrl);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
|
|
int flags, ret = 0;
|
|
|
|
switch (cmd) {
|
|
case RTC_VL_READ:
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags < 0)
|
|
return flags;
|
|
|
|
if (flags & RV8803_FLAG_V1F)
|
|
dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n");
|
|
|
|
if (flags & RV8803_FLAG_V2F)
|
|
dev_warn(&client->dev, "Voltage low, data loss detected.\n");
|
|
|
|
flags &= RV8803_FLAG_V1F | RV8803_FLAG_V2F;
|
|
|
|
if (copy_to_user((void __user *)arg, &flags, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
case RTC_VL_CLR:
|
|
mutex_lock(&rv8803->flags_lock);
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags < 0) {
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
return flags;
|
|
}
|
|
|
|
flags &= ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F);
|
|
ret = rv8803_write_reg(client, RV8803_FLAG, flags);
|
|
mutex_unlock(&rv8803->flags_lock);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static ssize_t rv8803_nvram_write(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *attr,
|
|
char *buf, loff_t off, size_t count)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret;
|
|
|
|
ret = rv8803_write_reg(client, RV8803_RAM, buf[0]);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static ssize_t rv8803_nvram_read(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *attr,
|
|
char *buf, loff_t off, size_t count)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret;
|
|
|
|
ret = rv8803_read_reg(client, RV8803_RAM);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
buf[0] = ret;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct bin_attribute rv8803_nvram_attr = {
|
|
.attr = {
|
|
.name = "nvram",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
},
|
|
.size = 1,
|
|
.read = rv8803_nvram_read,
|
|
.write = rv8803_nvram_write,
|
|
};
|
|
|
|
static struct rtc_class_ops rv8803_rtc_ops = {
|
|
.read_time = rv8803_get_time,
|
|
.set_time = rv8803_set_time,
|
|
.ioctl = rv8803_ioctl,
|
|
};
|
|
|
|
static int rx8900_trickle_charger_init(struct rv8803_data *rv8803)
|
|
{
|
|
struct i2c_client *client = rv8803->client;
|
|
struct device_node *node = client->dev.of_node;
|
|
int err;
|
|
u8 flags;
|
|
|
|
if (!node)
|
|
return 0;
|
|
|
|
if (rv8803->type != rx_8900)
|
|
return 0;
|
|
|
|
err = i2c_smbus_read_byte_data(rv8803->client, RX8900_BACKUP_CTRL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
flags = ~(RX8900_FLAG_VDETOFF | RX8900_FLAG_SWOFF) & (u8)err;
|
|
|
|
if (of_property_read_bool(node, "epson,vdet-disable"))
|
|
flags |= RX8900_FLAG_VDETOFF;
|
|
|
|
if (of_property_read_bool(node, "trickle-diode-disable"))
|
|
flags |= RX8900_FLAG_SWOFF;
|
|
|
|
return i2c_smbus_write_byte_data(rv8803->client, RX8900_BACKUP_CTRL,
|
|
flags);
|
|
}
|
|
|
|
static int rv8803_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
|
struct rv8803_data *rv8803;
|
|
int err, flags;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
|
I2C_FUNC_SMBUS_I2C_BLOCK)) {
|
|
dev_err(&adapter->dev, "doesn't support I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK\n");
|
|
return -EIO;
|
|
}
|
|
|
|
rv8803 = devm_kzalloc(&client->dev, sizeof(struct rv8803_data),
|
|
GFP_KERNEL);
|
|
if (!rv8803)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&rv8803->flags_lock);
|
|
rv8803->client = client;
|
|
rv8803->type = id->driver_data;
|
|
i2c_set_clientdata(client, rv8803);
|
|
|
|
flags = rv8803_read_reg(client, RV8803_FLAG);
|
|
if (flags < 0)
|
|
return flags;
|
|
|
|
if (flags & RV8803_FLAG_V1F)
|
|
dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n");
|
|
|
|
if (flags & RV8803_FLAG_V2F)
|
|
dev_warn(&client->dev, "Voltage low, data loss detected.\n");
|
|
|
|
if (flags & RV8803_FLAG_AF)
|
|
dev_warn(&client->dev, "An alarm maybe have been missed.\n");
|
|
|
|
if (client->irq > 0) {
|
|
err = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, rv8803_handle_irq,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
"rv8803", client);
|
|
if (err) {
|
|
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
|
|
client->irq = 0;
|
|
} else {
|
|
rv8803_rtc_ops.read_alarm = rv8803_get_alarm;
|
|
rv8803_rtc_ops.set_alarm = rv8803_set_alarm;
|
|
rv8803_rtc_ops.alarm_irq_enable = rv8803_alarm_irq_enable;
|
|
}
|
|
}
|
|
|
|
rv8803->rtc = devm_rtc_device_register(&client->dev, client->name,
|
|
&rv8803_rtc_ops, THIS_MODULE);
|
|
if (IS_ERR(rv8803->rtc)) {
|
|
dev_err(&client->dev, "unable to register the class device\n");
|
|
return PTR_ERR(rv8803->rtc);
|
|
}
|
|
|
|
err = rv8803_write_reg(rv8803->client, RV8803_EXT, RV8803_EXT_WADA);
|
|
if (err)
|
|
return err;
|
|
|
|
err = rx8900_trickle_charger_init(rv8803);
|
|
if (err) {
|
|
dev_err(&client->dev, "failed to init charger\n");
|
|
return err;
|
|
}
|
|
|
|
err = device_create_bin_file(&client->dev, &rv8803_nvram_attr);
|
|
if (err)
|
|
return err;
|
|
|
|
rv8803->rtc->max_user_freq = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rv8803_remove(struct i2c_client *client)
|
|
{
|
|
device_remove_bin_file(&client->dev, &rv8803_nvram_attr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id rv8803_id[] = {
|
|
{ "rv8803", rv_8803 },
|
|
{ "rx8900", rx_8900 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, rv8803_id);
|
|
|
|
static struct i2c_driver rv8803_driver = {
|
|
.driver = {
|
|
.name = "rtc-rv8803",
|
|
},
|
|
.probe = rv8803_probe,
|
|
.remove = rv8803_remove,
|
|
.id_table = rv8803_id,
|
|
};
|
|
module_i2c_driver(rv8803_driver);
|
|
|
|
MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Micro Crystal RV8803 RTC driver");
|
|
MODULE_LICENSE("GPL v2");
|