mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 15:16:45 +07:00
5dd3ffae0a
Stop using i2c_adapter.class_dev, as it is going to be removed soon. Luckily, there are only 4 RTC drivers affected. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Alessandro Zummo <a.zummo@towertech.it>
702 lines
17 KiB
C
702 lines
17 KiB
C
/*
|
|
* An I2C driver for Ricoh RS5C372 and RV5C38[67] RTCs
|
|
*
|
|
* Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net>
|
|
* Copyright (C) 2006 Tower Technologies
|
|
*
|
|
* 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/i2c.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/bcd.h>
|
|
|
|
#define DRV_VERSION "0.4"
|
|
|
|
/* Addresses to scan */
|
|
static unsigned short normal_i2c[] = { /* 0x32,*/ I2C_CLIENT_END };
|
|
|
|
/* Insmod parameters */
|
|
I2C_CLIENT_INSMOD;
|
|
|
|
|
|
/*
|
|
* Ricoh has a family of I2C based RTCs, which differ only slightly from
|
|
* each other. Differences center on pinout (e.g. how many interrupts,
|
|
* output clock, etc) and how the control registers are used. The '372
|
|
* is significant only because that's the one this driver first supported.
|
|
*/
|
|
#define RS5C372_REG_SECS 0
|
|
#define RS5C372_REG_MINS 1
|
|
#define RS5C372_REG_HOURS 2
|
|
#define RS5C372_REG_WDAY 3
|
|
#define RS5C372_REG_DAY 4
|
|
#define RS5C372_REG_MONTH 5
|
|
#define RS5C372_REG_YEAR 6
|
|
#define RS5C372_REG_TRIM 7
|
|
# define RS5C372_TRIM_XSL 0x80
|
|
# define RS5C372_TRIM_MASK 0x7F
|
|
|
|
#define RS5C_REG_ALARM_A_MIN 8 /* or ALARM_W */
|
|
#define RS5C_REG_ALARM_A_HOURS 9
|
|
#define RS5C_REG_ALARM_A_WDAY 10
|
|
|
|
#define RS5C_REG_ALARM_B_MIN 11 /* or ALARM_D */
|
|
#define RS5C_REG_ALARM_B_HOURS 12
|
|
#define RS5C_REG_ALARM_B_WDAY 13 /* (ALARM_B only) */
|
|
|
|
#define RS5C_REG_CTRL1 14
|
|
# define RS5C_CTRL1_AALE (1 << 7) /* or WALE */
|
|
# define RS5C_CTRL1_BALE (1 << 6) /* or DALE */
|
|
# define RV5C387_CTRL1_24 (1 << 5)
|
|
# define RS5C372A_CTRL1_SL1 (1 << 5)
|
|
# define RS5C_CTRL1_CT_MASK (7 << 0)
|
|
# define RS5C_CTRL1_CT0 (0 << 0) /* no periodic irq */
|
|
# define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */
|
|
#define RS5C_REG_CTRL2 15
|
|
# define RS5C372_CTRL2_24 (1 << 5)
|
|
# define RS5C_CTRL2_XSTP (1 << 4)
|
|
# define RS5C_CTRL2_CTFG (1 << 2)
|
|
# define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */
|
|
# define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */
|
|
|
|
|
|
/* to read (style 1) or write registers starting at R */
|
|
#define RS5C_ADDR(R) (((R) << 4) | 0)
|
|
|
|
|
|
enum rtc_type {
|
|
rtc_undef = 0,
|
|
rtc_rs5c372a,
|
|
rtc_rs5c372b,
|
|
rtc_rv5c386,
|
|
rtc_rv5c387a,
|
|
};
|
|
|
|
/* REVISIT: this assumes that:
|
|
* - we're in the 21st century, so it's safe to ignore the century
|
|
* bit for rv5c38[67] (REG_MONTH bit 7);
|
|
* - we should use ALARM_A not ALARM_B (may be wrong on some boards)
|
|
*/
|
|
struct rs5c372 {
|
|
struct i2c_client *client;
|
|
struct rtc_device *rtc;
|
|
enum rtc_type type;
|
|
unsigned time24:1;
|
|
unsigned has_irq:1;
|
|
char buf[17];
|
|
char *regs;
|
|
|
|
/* on conversion to a "new style" i2c driver, this vanishes */
|
|
struct i2c_client dev;
|
|
};
|
|
|
|
static int rs5c_get_regs(struct rs5c372 *rs5c)
|
|
{
|
|
struct i2c_client *client = rs5c->client;
|
|
struct i2c_msg msgs[] = {
|
|
{ client->addr, I2C_M_RD, sizeof rs5c->buf, rs5c->buf },
|
|
};
|
|
|
|
/* This implements the third reading method from the datasheet, using
|
|
* an internal address that's reset after each transaction (by STOP)
|
|
* to 0x0f ... so we read extra registers, and skip the first one.
|
|
*
|
|
* The first method doesn't work with the iop3xx adapter driver, on at
|
|
* least 80219 chips; this works around that bug.
|
|
*/
|
|
if ((i2c_transfer(client->adapter, msgs, 1)) != 1) {
|
|
pr_debug("%s: can't read registers\n", rs5c->rtc->name);
|
|
return -EIO;
|
|
}
|
|
|
|
dev_dbg(&client->dev,
|
|
"%02x %02x %02x (%02x) %02x %02x %02x (%02x), "
|
|
"%02x %02x %02x, %02x %02x %02x; %02x %02x\n",
|
|
rs5c->regs[0], rs5c->regs[1], rs5c->regs[2], rs5c->regs[3],
|
|
rs5c->regs[4], rs5c->regs[5], rs5c->regs[6], rs5c->regs[7],
|
|
rs5c->regs[8], rs5c->regs[9], rs5c->regs[10], rs5c->regs[11],
|
|
rs5c->regs[12], rs5c->regs[13], rs5c->regs[14], rs5c->regs[15]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned rs5c_reg2hr(struct rs5c372 *rs5c, unsigned reg)
|
|
{
|
|
unsigned hour;
|
|
|
|
if (rs5c->time24)
|
|
return BCD2BIN(reg & 0x3f);
|
|
|
|
hour = BCD2BIN(reg & 0x1f);
|
|
if (hour == 12)
|
|
hour = 0;
|
|
if (reg & 0x20)
|
|
hour += 12;
|
|
return hour;
|
|
}
|
|
|
|
static unsigned rs5c_hr2reg(struct rs5c372 *rs5c, unsigned hour)
|
|
{
|
|
if (rs5c->time24)
|
|
return BIN2BCD(hour);
|
|
|
|
if (hour > 12)
|
|
return 0x20 | BIN2BCD(hour - 12);
|
|
if (hour == 12)
|
|
return 0x20 | BIN2BCD(12);
|
|
if (hour == 0)
|
|
return BIN2BCD(12);
|
|
return BIN2BCD(hour);
|
|
}
|
|
|
|
static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm)
|
|
{
|
|
struct rs5c372 *rs5c = i2c_get_clientdata(client);
|
|
int status = rs5c_get_regs(rs5c);
|
|
|
|
if (status < 0)
|
|
return status;
|
|
|
|
tm->tm_sec = BCD2BIN(rs5c->regs[RS5C372_REG_SECS] & 0x7f);
|
|
tm->tm_min = BCD2BIN(rs5c->regs[RS5C372_REG_MINS] & 0x7f);
|
|
tm->tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C372_REG_HOURS]);
|
|
|
|
tm->tm_wday = BCD2BIN(rs5c->regs[RS5C372_REG_WDAY] & 0x07);
|
|
tm->tm_mday = BCD2BIN(rs5c->regs[RS5C372_REG_DAY] & 0x3f);
|
|
|
|
/* tm->tm_mon is zero-based */
|
|
tm->tm_mon = BCD2BIN(rs5c->regs[RS5C372_REG_MONTH] & 0x1f) - 1;
|
|
|
|
/* year is 1900 + tm->tm_year */
|
|
tm->tm_year = BCD2BIN(rs5c->regs[RS5C372_REG_YEAR]) + 100;
|
|
|
|
dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
|
|
"mday=%d, mon=%d, year=%d, wday=%d\n",
|
|
__FUNCTION__,
|
|
tm->tm_sec, tm->tm_min, tm->tm_hour,
|
|
tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
|
|
|
|
/* rtc might need initialization */
|
|
return rtc_valid_tm(tm);
|
|
}
|
|
|
|
static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm)
|
|
{
|
|
struct rs5c372 *rs5c = i2c_get_clientdata(client);
|
|
unsigned char buf[8];
|
|
|
|
dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d "
|
|
"mday=%d, mon=%d, year=%d, wday=%d\n",
|
|
__FUNCTION__,
|
|
tm->tm_sec, tm->tm_min, tm->tm_hour,
|
|
tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
|
|
|
|
buf[0] = RS5C_ADDR(RS5C372_REG_SECS);
|
|
buf[1] = BIN2BCD(tm->tm_sec);
|
|
buf[2] = BIN2BCD(tm->tm_min);
|
|
buf[3] = rs5c_hr2reg(rs5c, tm->tm_hour);
|
|
buf[4] = BIN2BCD(tm->tm_wday);
|
|
buf[5] = BIN2BCD(tm->tm_mday);
|
|
buf[6] = BIN2BCD(tm->tm_mon + 1);
|
|
buf[7] = BIN2BCD(tm->tm_year - 100);
|
|
|
|
if ((i2c_master_send(client, buf, 8)) != 8) {
|
|
dev_err(&client->dev, "%s: write error\n", __FUNCTION__);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
|
|
#define NEED_TRIM
|
|
#endif
|
|
|
|
#if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE)
|
|
#define NEED_TRIM
|
|
#endif
|
|
|
|
#ifdef NEED_TRIM
|
|
static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim)
|
|
{
|
|
struct rs5c372 *rs5c372 = i2c_get_clientdata(client);
|
|
u8 tmp = rs5c372->regs[RS5C372_REG_TRIM];
|
|
|
|
if (osc)
|
|
*osc = (tmp & RS5C372_TRIM_XSL) ? 32000 : 32768;
|
|
|
|
if (trim) {
|
|
dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, tmp);
|
|
tmp &= RS5C372_TRIM_MASK;
|
|
if (tmp & 0x3e) {
|
|
int t = tmp & 0x3f;
|
|
|
|
if (tmp & 0x40)
|
|
t = (~t | (s8)0xc0) + 1;
|
|
else
|
|
t = t - 1;
|
|
|
|
tmp = t * 2;
|
|
} else
|
|
tmp = 0;
|
|
*trim = tmp;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int rs5c372_rtc_read_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
return rs5c372_get_datetime(to_i2c_client(dev), tm);
|
|
}
|
|
|
|
static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
return rs5c372_set_datetime(to_i2c_client(dev), tm);
|
|
}
|
|
|
|
#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE)
|
|
|
|
static int
|
|
rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rs5c372 *rs5c = i2c_get_clientdata(client);
|
|
unsigned char buf[2];
|
|
int status;
|
|
|
|
buf[1] = rs5c->regs[RS5C_REG_CTRL1];
|
|
switch (cmd) {
|
|
case RTC_UIE_OFF:
|
|
case RTC_UIE_ON:
|
|
/* some 327a modes use a different IRQ pin for 1Hz irqs */
|
|
if (rs5c->type == rtc_rs5c372a
|
|
&& (buf[1] & RS5C372A_CTRL1_SL1))
|
|
return -ENOIOCTLCMD;
|
|
case RTC_AIE_OFF:
|
|
case RTC_AIE_ON:
|
|
/* these irq management calls only make sense for chips
|
|
* which are wired up to an IRQ.
|
|
*/
|
|
if (!rs5c->has_irq)
|
|
return -ENOIOCTLCMD;
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
status = rs5c_get_regs(rs5c);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
|
|
switch (cmd) {
|
|
case RTC_AIE_OFF: /* alarm off */
|
|
buf[1] &= ~RS5C_CTRL1_AALE;
|
|
break;
|
|
case RTC_AIE_ON: /* alarm on */
|
|
buf[1] |= RS5C_CTRL1_AALE;
|
|
break;
|
|
case RTC_UIE_OFF: /* update off */
|
|
buf[1] &= ~RS5C_CTRL1_CT_MASK;
|
|
break;
|
|
case RTC_UIE_ON: /* update on */
|
|
buf[1] &= ~RS5C_CTRL1_CT_MASK;
|
|
buf[1] |= RS5C_CTRL1_CT4;
|
|
break;
|
|
}
|
|
if ((i2c_master_send(client, buf, 2)) != 2) {
|
|
printk(KERN_WARNING "%s: can't update alarm\n",
|
|
rs5c->rtc->name);
|
|
status = -EIO;
|
|
} else
|
|
rs5c->regs[RS5C_REG_CTRL1] = buf[1];
|
|
return status;
|
|
}
|
|
|
|
#else
|
|
#define rs5c_rtc_ioctl NULL
|
|
#endif
|
|
|
|
|
|
/* NOTE: Since RTC_WKALM_{RD,SET} were originally defined for EFI,
|
|
* which only exposes a polled programming interface; and since
|
|
* these calls map directly to those EFI requests; we don't demand
|
|
* we have an IRQ for this chip when we go through this API.
|
|
*
|
|
* The older x86_pc derived RTC_ALM_{READ,SET} calls require irqs
|
|
* though, managed through RTC_AIE_{ON,OFF} requests.
|
|
*/
|
|
|
|
static int rs5c_read_alarm(struct device *dev, struct rtc_wkalrm *t)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rs5c372 *rs5c = i2c_get_clientdata(client);
|
|
int status;
|
|
|
|
status = rs5c_get_regs(rs5c);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
/* report alarm time */
|
|
t->time.tm_sec = 0;
|
|
t->time.tm_min = BCD2BIN(rs5c->regs[RS5C_REG_ALARM_A_MIN] & 0x7f);
|
|
t->time.tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C_REG_ALARM_A_HOURS]);
|
|
t->time.tm_mday = -1;
|
|
t->time.tm_mon = -1;
|
|
t->time.tm_year = -1;
|
|
t->time.tm_wday = -1;
|
|
t->time.tm_yday = -1;
|
|
t->time.tm_isdst = -1;
|
|
|
|
/* ... and status */
|
|
t->enabled = !!(rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE);
|
|
t->pending = !!(rs5c->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_AAFG);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rs5c372 *rs5c = i2c_get_clientdata(client);
|
|
int status;
|
|
unsigned char buf[4];
|
|
|
|
/* only handle up to 24 hours in the future, like RTC_ALM_SET */
|
|
if (t->time.tm_mday != -1
|
|
|| t->time.tm_mon != -1
|
|
|| t->time.tm_year != -1)
|
|
return -EINVAL;
|
|
|
|
/* REVISIT: round up tm_sec */
|
|
|
|
/* if needed, disable irq (clears pending status) */
|
|
status = rs5c_get_regs(rs5c);
|
|
if (status < 0)
|
|
return status;
|
|
if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) {
|
|
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
|
|
buf[1] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE;
|
|
if (i2c_master_send(client, buf, 2) != 2) {
|
|
pr_debug("%s: can't disable alarm\n", rs5c->rtc->name);
|
|
return -EIO;
|
|
}
|
|
rs5c->regs[RS5C_REG_CTRL1] = buf[1];
|
|
}
|
|
|
|
/* set alarm */
|
|
buf[0] = RS5C_ADDR(RS5C_REG_ALARM_A_MIN);
|
|
buf[1] = BIN2BCD(t->time.tm_min);
|
|
buf[2] = rs5c_hr2reg(rs5c, t->time.tm_hour);
|
|
buf[3] = 0x7f; /* any/all days */
|
|
if ((i2c_master_send(client, buf, 4)) != 4) {
|
|
pr_debug("%s: can't set alarm time\n", rs5c->rtc->name);
|
|
return -EIO;
|
|
}
|
|
|
|
/* ... and maybe enable its irq */
|
|
if (t->enabled) {
|
|
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
|
|
buf[1] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE;
|
|
if ((i2c_master_send(client, buf, 2)) != 2)
|
|
printk(KERN_WARNING "%s: can't enable alarm\n",
|
|
rs5c->rtc->name);
|
|
rs5c->regs[RS5C_REG_CTRL1] = buf[1];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
|
|
|
|
static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq)
|
|
{
|
|
int err, osc, trim;
|
|
|
|
err = rs5c372_get_trim(to_i2c_client(dev), &osc, &trim);
|
|
if (err == 0) {
|
|
seq_printf(seq, "crystal\t\t: %d.%03d KHz\n",
|
|
osc / 1000, osc % 1000);
|
|
seq_printf(seq, "trim\t\t: %d\n", trim);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define rs5c372_rtc_proc NULL
|
|
#endif
|
|
|
|
static const struct rtc_class_ops rs5c372_rtc_ops = {
|
|
.proc = rs5c372_rtc_proc,
|
|
.ioctl = rs5c_rtc_ioctl,
|
|
.read_time = rs5c372_rtc_read_time,
|
|
.set_time = rs5c372_rtc_set_time,
|
|
.read_alarm = rs5c_read_alarm,
|
|
.set_alarm = rs5c_set_alarm,
|
|
};
|
|
|
|
#if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE)
|
|
|
|
static ssize_t rs5c372_sysfs_show_trim(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int err, trim;
|
|
|
|
err = rs5c372_get_trim(to_i2c_client(dev), NULL, &trim);
|
|
if (err)
|
|
return err;
|
|
|
|
return sprintf(buf, "%d\n", trim);
|
|
}
|
|
static DEVICE_ATTR(trim, S_IRUGO, rs5c372_sysfs_show_trim, NULL);
|
|
|
|
static ssize_t rs5c372_sysfs_show_osc(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int err, osc;
|
|
|
|
err = rs5c372_get_trim(to_i2c_client(dev), &osc, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
return sprintf(buf, "%d.%03d KHz\n", osc / 1000, osc % 1000);
|
|
}
|
|
static DEVICE_ATTR(osc, S_IRUGO, rs5c372_sysfs_show_osc, NULL);
|
|
|
|
static int rs5c_sysfs_register(struct device *dev)
|
|
{
|
|
int err;
|
|
|
|
err = device_create_file(dev, &dev_attr_trim);
|
|
if (err)
|
|
return err;
|
|
err = device_create_file(dev, &dev_attr_osc);
|
|
if (err)
|
|
device_remove_file(dev, &dev_attr_trim);
|
|
|
|
return err;
|
|
}
|
|
|
|
#else
|
|
static int rs5c_sysfs_register(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* SYSFS */
|
|
|
|
static struct i2c_driver rs5c372_driver;
|
|
|
|
static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
|
|
{
|
|
int err = 0;
|
|
struct i2c_client *client;
|
|
struct rs5c372 *rs5c372;
|
|
struct rtc_time tm;
|
|
|
|
dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
|
|
rs5c372->regs=&rs5c372->buf[1];
|
|
|
|
/* On conversion to a "new style" i2c driver, we'll be handed
|
|
* the i2c_client (we won't create it)
|
|
*/
|
|
client = &rs5c372->dev;
|
|
rs5c372->client = client;
|
|
|
|
/* I2C client */
|
|
client->addr = address;
|
|
client->driver = &rs5c372_driver;
|
|
client->adapter = adapter;
|
|
|
|
strlcpy(client->name, rs5c372_driver.driver.name, I2C_NAME_SIZE);
|
|
|
|
i2c_set_clientdata(client, rs5c372);
|
|
|
|
/* Inform the i2c layer */
|
|
if ((err = i2c_attach_client(client)))
|
|
goto exit_kfree;
|
|
|
|
err = rs5c_get_regs(rs5c372);
|
|
if (err < 0)
|
|
goto exit_detach;
|
|
|
|
/* For "new style" drivers, irq is in i2c_client and chip type
|
|
* info comes from i2c_client.dev.platform_data. Meanwhile:
|
|
*
|
|
* STICK BOARD-SPECIFIC SETUP CODE RIGHT HERE
|
|
*/
|
|
if (rs5c372->type == rtc_undef) {
|
|
rs5c372->type = rtc_rs5c372b;
|
|
dev_warn(&client->dev, "assuming rs5c372b\n");
|
|
}
|
|
|
|
/* clock may be set for am/pm or 24 hr time */
|
|
switch (rs5c372->type) {
|
|
case rtc_rs5c372a:
|
|
case rtc_rs5c372b:
|
|
/* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b.
|
|
* so does periodic irq, except some 327a modes.
|
|
*/
|
|
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
case rtc_rv5c386:
|
|
case rtc_rv5c387a:
|
|
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
|
|
rs5c372->time24 = 1;
|
|
/* alarm uses ALARM_W; and nINTRB for alarm and periodic
|
|
* irq, on both 386 and 387
|
|
*/
|
|
break;
|
|
default:
|
|
dev_err(&client->dev, "unknown RTC type\n");
|
|
goto exit_detach;
|
|
}
|
|
|
|
/* if the oscillator lost power and no other software (like
|
|
* the bootloader) set it up, do it here.
|
|
*/
|
|
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP) {
|
|
unsigned char buf[3];
|
|
|
|
rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
|
|
|
|
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
|
|
buf[1] = rs5c372->regs[RS5C_REG_CTRL1];
|
|
buf[2] = rs5c372->regs[RS5C_REG_CTRL2];
|
|
|
|
/* use 24hr mode */
|
|
switch (rs5c372->type) {
|
|
case rtc_rs5c372a:
|
|
case rtc_rs5c372b:
|
|
buf[2] |= RS5C372_CTRL2_24;
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
case rtc_rv5c386:
|
|
case rtc_rv5c387a:
|
|
buf[1] |= RV5C387_CTRL1_24;
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
default:
|
|
/* impossible */
|
|
break;
|
|
}
|
|
|
|
if ((i2c_master_send(client, buf, 3)) != 3) {
|
|
dev_err(&client->dev, "setup error\n");
|
|
goto exit_detach;
|
|
}
|
|
rs5c372->regs[RS5C_REG_CTRL1] = buf[1];
|
|
rs5c372->regs[RS5C_REG_CTRL2] = buf[2];
|
|
}
|
|
|
|
if (rs5c372_get_datetime(client, &tm) < 0)
|
|
dev_warn(&client->dev, "clock needs to be set\n");
|
|
|
|
dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
|
|
({ char *s; switch (rs5c372->type) {
|
|
case rtc_rs5c372a: s = "rs5c372a"; break;
|
|
case rtc_rs5c372b: s = "rs5c372b"; break;
|
|
case rtc_rv5c386: s = "rv5c386"; break;
|
|
case rtc_rv5c387a: s = "rv5c387a"; break;
|
|
default: s = "chip"; break;
|
|
}; s;}),
|
|
rs5c372->time24 ? "24hr" : "am/pm"
|
|
);
|
|
|
|
/* FIXME when client->irq exists, use it to register alarm irq */
|
|
|
|
rs5c372->rtc = rtc_device_register(rs5c372_driver.driver.name,
|
|
&client->dev, &rs5c372_rtc_ops, THIS_MODULE);
|
|
|
|
if (IS_ERR(rs5c372->rtc)) {
|
|
err = PTR_ERR(rs5c372->rtc);
|
|
goto exit_detach;
|
|
}
|
|
|
|
err = rs5c_sysfs_register(&client->dev);
|
|
if (err)
|
|
goto exit_devreg;
|
|
|
|
return 0;
|
|
|
|
exit_devreg:
|
|
rtc_device_unregister(rs5c372->rtc);
|
|
|
|
exit_detach:
|
|
i2c_detach_client(client);
|
|
|
|
exit_kfree:
|
|
kfree(rs5c372);
|
|
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int rs5c372_attach(struct i2c_adapter *adapter)
|
|
{
|
|
return i2c_probe(adapter, &addr_data, rs5c372_probe);
|
|
}
|
|
|
|
static int rs5c372_detach(struct i2c_client *client)
|
|
{
|
|
int err;
|
|
struct rs5c372 *rs5c372 = i2c_get_clientdata(client);
|
|
|
|
if (rs5c372->rtc)
|
|
rtc_device_unregister(rs5c372->rtc);
|
|
|
|
/* REVISIT properly destroy the sysfs files ... */
|
|
|
|
if ((err = i2c_detach_client(client)))
|
|
return err;
|
|
|
|
kfree(rs5c372);
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver rs5c372_driver = {
|
|
.driver = {
|
|
.name = "rtc-rs5c372",
|
|
},
|
|
.attach_adapter = &rs5c372_attach,
|
|
.detach_client = &rs5c372_detach,
|
|
};
|
|
|
|
static __init int rs5c372_init(void)
|
|
{
|
|
return i2c_add_driver(&rs5c372_driver);
|
|
}
|
|
|
|
static __exit void rs5c372_exit(void)
|
|
{
|
|
i2c_del_driver(&rs5c372_driver);
|
|
}
|
|
|
|
module_init(rs5c372_init);
|
|
module_exit(rs5c372_exit);
|
|
|
|
MODULE_AUTHOR(
|
|
"Pavel Mironchik <pmironchik@optifacio.net>, "
|
|
"Alessandro Zummo <a.zummo@towertech.it>");
|
|
MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|