Skip to content

L
linux
Commit d0e3f61b authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Alexandre Belloni
Browse files
Options

rtc: ds1307: forward declare chips array instead of a bunch of functions 

There used to be 16 declarations for static functions. By just adding a
declaration for the chips array and reordering the functions the 16
function declarations can be dropped.
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 92cbf12f
Show whitespace changes
Inline Side-by-side
Showing with 482 additions and 510 deletions
drivers/rtc/rtc-ds1307.c
View file @ d0e3f61b
......@@ -184,289 +184,7 @@ struct chip_desc {
bool);
};
static int ds1307_get_time(struct device *dev, struct rtc_time *t);
static int ds1307_set_time(struct device *dev, struct rtc_time *t);
static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t);
static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t);
static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled);
static u8 do_trickle_setup_ds1339(struct ds1307 *, u32 ohms, bool diode);
static irqreturn_t rx8130_irq(int irq, void *dev_id);
static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t);
static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t);
static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled);
static irqreturn_t mcp794xx_irq(int irq, void *dev_id);
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t);
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t);
static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled);
static int m41txx_rtc_read_offset(struct device *dev, long *offset);
static int m41txx_rtc_set_offset(struct device *dev, long offset);
static const struct rtc_class_ops rx8130_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = rx8130_read_alarm,
.set_alarm = rx8130_set_alarm,
.alarm_irq_enable = rx8130_alarm_irq_enable,
};
static const struct rtc_class_ops mcp794xx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = mcp794xx_read_alarm,
.set_alarm = mcp794xx_set_alarm,
.alarm_irq_enable = mcp794xx_alarm_irq_enable,
};
static const struct rtc_class_ops m41txx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = ds1337_read_alarm,
.set_alarm = ds1337_set_alarm,
.alarm_irq_enable = ds1307_alarm_irq_enable,
.read_offset = m41txx_rtc_read_offset,
.set_offset = m41txx_rtc_set_offset,
};
static const struct chip_desc chips[last_ds_type] = {
[ds_1307] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1308] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1337] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
},
[ds_1338] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1339] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
.bbsqi_bit = DS1339_BIT_BBSQI,
.trickle_charger_reg = 0x10,
.do_trickle_setup = &do_trickle_setup_ds1339,
},
[ds_1340] = {
.century_reg = DS1307_REG_HOUR,
.century_enable_bit = DS1340_BIT_CENTURY_EN,
.century_bit = DS1340_BIT_CENTURY,
.do_trickle_setup = &do_trickle_setup_ds1339,
.trickle_charger_reg = 0x08,
},
[ds_1341] = {
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
},
[ds_1388] = {
.offset = 1,
.trickle_charger_reg = 0x0a,
},
[ds_3231] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
.bbsqi_bit = DS3231_BIT_BBSQW,
},
[rx_8130] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 4, /* 32bit (4 word x 8 bit) */
.offset = 0x10,
.irq_handler = rx8130_irq,
.rtc_ops = &rx8130_rtc_ops,
},
[m41t0] = {
.rtc_ops = &m41txx_rtc_ops,
},
[m41t00] = {
.rtc_ops = &m41txx_rtc_ops,
},
[m41t11] = {
/* this is battery backed SRAM */
.nvram_offset = 8,
.nvram_size = 56,
.rtc_ops = &m41txx_rtc_ops,
},
[mcp794xx] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 0x40,
.irq_handler = mcp794xx_irq,
.rtc_ops = &mcp794xx_rtc_ops,
},
};
static const struct i2c_device_id ds1307_id[] = {
{ "ds1307", ds_1307 },
{ "ds1308", ds_1308 },
{ "ds1337", ds_1337 },
{ "ds1338", ds_1338 },
{ "ds1339", ds_1339 },
{ "ds1388", ds_1388 },
{ "ds1340", ds_1340 },
{ "ds1341", ds_1341 },
{ "ds3231", ds_3231 },
{ "m41t0", m41t0 },
{ "m41t00", m41t00 },
{ "m41t11", m41t11 },
{ "mcp7940x", mcp794xx },
{ "mcp7941x", mcp794xx },
{ "pt7c4338", ds_1307 },
{ "rx8025", rx_8025 },
{ "isl12057", ds_1337 },
{ "rx8130", rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ds1307_id);
#ifdef CONFIG_OF
static const struct of_device_id ds1307_of_match[] = {
{
.compatible = "dallas,ds1307",
.data = (void *)ds_1307
},
{
.compatible = "dallas,ds1308",
.data = (void *)ds_1308
},
{
.compatible = "dallas,ds1337",
.data = (void *)ds_1337
},
{
.compatible = "dallas,ds1338",
.data = (void *)ds_1338
},
{
.compatible = "dallas,ds1339",
.data = (void *)ds_1339
},
{
.compatible = "dallas,ds1388",
.data = (void *)ds_1388
},
{
.compatible = "dallas,ds1340",
.data = (void *)ds_1340
},
{
.compatible = "dallas,ds1341",
.data = (void *)ds_1341
},
{
.compatible = "maxim,ds3231",
.data = (void *)ds_3231
},
{
.compatible = "st,m41t0",
.data = (void *)m41t0
},
{
.compatible = "st,m41t00",
.data = (void *)m41t00
},
{
.compatible = "st,m41t11",
.data = (void *)m41t11
},
{
.compatible = "microchip,mcp7940x",
.data = (void *)mcp794xx
},
{
.compatible = "microchip,mcp7941x",
.data = (void *)mcp794xx
},
{
.compatible = "pericom,pt7c4338",
.data = (void *)ds_1307
},
{
.compatible = "epson,rx8025",
.data = (void *)rx_8025
},
{
.compatible = "isil,isl12057",
.data = (void *)ds_1337
},
{
.compatible = "epson,rx8130",
.data = (void *)rx_8130
},
{ }
};
MODULE_DEVICE_TABLE(of, ds1307_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id ds1307_acpi_ids[] = {
{ .id = "DS1307", .driver_data = ds_1307 },
{ .id = "DS1308", .driver_data = ds_1308 },
{ .id = "DS1337", .driver_data = ds_1337 },
{ .id = "DS1338", .driver_data = ds_1338 },
{ .id = "DS1339", .driver_data = ds_1339 },
{ .id = "DS1388", .driver_data = ds_1388 },
{ .id = "DS1340", .driver_data = ds_1340 },
{ .id = "DS1341", .driver_data = ds_1341 },
{ .id = "DS3231", .driver_data = ds_3231 },
{ .id = "M41T0", .driver_data = m41t0 },
{ .id = "M41T00", .driver_data = m41t00 },
{ .id = "M41T11", .driver_data = m41t11 },
{ .id = "MCP7940X", .driver_data = mcp794xx },
{ .id = "MCP7941X", .driver_data = mcp794xx },
{ .id = "PT7C4338", .driver_data = ds_1307 },
{ .id = "RX8025", .driver_data = rx_8025 },
{ .id = "ISL12057", .driver_data = ds_1337 },
{ .id = "RX8130", .driver_data = rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(acpi, ds1307_acpi_ids);
#endif
/*
* The ds1337 and ds1339 both have two alarms, but we only use the first
* one (with a "seconds" field). For ds1337 we expect nINTA is our alarm
* signal; ds1339 chips have only one alarm signal.
*/
static irqreturn_t ds1307_irq(int irq, void *dev_id)
{
struct ds1307 *ds1307 = dev_id;
struct mutex *lock = &ds1307->rtc->ops_lock;
int stat, ret;
mutex_lock(lock);
ret = regmap_read(ds1307->regmap, DS1337_REG_STATUS, &stat);
if (ret)
goto out;
if (stat & DS1337_BIT_A1I) {
stat &= ~DS1337_BIT_A1I;
regmap_write(ds1307->regmap, DS1337_REG_STATUS, stat);
ret = regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
DS1337_BIT_A1IE, 0);
if (ret)
goto out;
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
}
out:
mutex_unlock(lock);
return IRQ_HANDLED;
}
/*----------------------------------------------------------------------*/
static const struct chip_desc chips[last_ds_type];
static int ds1307_get_time(struct device *dev, struct rtc_time *t)
{
......@@ -692,19 +410,28 @@ static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled)
enabled ? DS1337_BIT_A1IE : 0);
}
static const struct rtc_class_ops ds13xx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = ds1337_read_alarm,
.set_alarm = ds1337_set_alarm,
.alarm_irq_enable = ds1307_alarm_irq_enable,
};
/*----------------------------------------------------------------------*/
static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307, u32 ohms, bool diode)
{
u8 setup = (diode) ? DS1307_TRICKLE_CHARGER_DIODE :
DS1307_TRICKLE_CHARGER_NO_DIODE;
/*
* Alarm support for rx8130 devices.
*/
switch (ohms) {
case 250:
setup |= DS1307_TRICKLE_CHARGER_250_OHM;
break;
case 2000:
setup |= DS1307_TRICKLE_CHARGER_2K_OHM;
break;
case 4000:
setup |= DS1307_TRICKLE_CHARGER_4K_OHM;
break;
default:
dev_warn(ds1307->dev,
"Unsupported ohm value %u in dt\n", ohms);
return 0;
}
return setup;
}
static irqreturn_t rx8130_irq(int irq, void *dev_id)
{
......@@ -822,65 +549,486 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
if (!t->enabled)
return 0;
ctl[2] |= RX8130_REG_CONTROL0_AIE;
return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
sizeof(ctl));
ctl[2] |= RX8130_REG_CONTROL0_AIE;
return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
sizeof(ctl));
}
static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
int ret, reg;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
ret = regmap_read(ds1307->regmap, RX8130_REG_CONTROL0, &reg);
if (ret < 0)
return ret;
if (enabled)
reg |= RX8130_REG_CONTROL0_AIE;
else
reg &= ~RX8130_REG_CONTROL0_AIE;
return regmap_write(ds1307->regmap, RX8130_REG_CONTROL0, reg);
}
static irqreturn_t mcp794xx_irq(int irq, void *dev_id)
{
struct ds1307 *ds1307 = dev_id;
struct mutex *lock = &ds1307->rtc->ops_lock;
int reg, ret;
mutex_lock(lock);
/* Check and clear alarm 0 interrupt flag. */
ret = regmap_read(ds1307->regmap, MCP794XX_REG_ALARM0_CTRL, &reg);
if (ret)
goto out;
if (!(reg & MCP794XX_BIT_ALMX_IF))
goto out;
reg &= ~MCP794XX_BIT_ALMX_IF;
ret = regmap_write(ds1307->regmap, MCP794XX_REG_ALARM0_CTRL, reg);
if (ret)
goto out;
/* Disable alarm 0. */
ret = regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
MCP794XX_BIT_ALM0_EN, 0);
if (ret)
goto out;
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
out:
mutex_unlock(lock);
return IRQ_HANDLED;
}
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
u8 regs[10];
int ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
/* Read control and alarm 0 registers. */
ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
t->enabled = !!(regs[0] & MCP794XX_BIT_ALM0_EN);
/* Report alarm 0 time assuming 24-hour and day-of-month modes. */
t->time.tm_sec = bcd2bin(regs[3] & 0x7f);
t->time.tm_min = bcd2bin(regs[4] & 0x7f);
t->time.tm_hour = bcd2bin(regs[5] & 0x3f);
t->time.tm_wday = bcd2bin(regs[6] & 0x7) - 1;
t->time.tm_mday = bcd2bin(regs[7] & 0x3f);
t->time.tm_mon = bcd2bin(regs[8] & 0x1f) - 1;
t->time.tm_year = -1;
t->time.tm_yday = -1;
t->time.tm_isdst = -1;
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
"enabled=%d polarity=%d irq=%d match=%lu\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, t->enabled,
!!(regs[6] & MCP794XX_BIT_ALMX_POL),
!!(regs[6] & MCP794XX_BIT_ALMX_IF),
(regs[6] & MCP794XX_MSK_ALMX_MATCH) >> 4);
return 0;
}
/*
* We may have a random RTC weekday, therefore calculate alarm weekday based
* on current weekday we read from the RTC timekeeping regs
*/
static int mcp794xx_alm_weekday(struct device *dev, struct rtc_time *tm_alarm)
{
struct rtc_time tm_now;
int days_now, days_alarm, ret;
ret = ds1307_get_time(dev, &tm_now);
if (ret)
return ret;
days_now = div_s64(rtc_tm_to_time64(&tm_now), 24 * 60 * 60);
days_alarm = div_s64(rtc_tm_to_time64(tm_alarm), 24 * 60 * 60);
return (tm_now.tm_wday + days_alarm - days_now) % 7 + 1;
}
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned char regs[10];
int wday, ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
wday = mcp794xx_alm_weekday(dev, &t->time);
if (wday < 0)
return wday;
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
"enabled=%d pending=%d\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon,
t->enabled, t->pending);
/* Read control and alarm 0 registers. */
ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
/* Set alarm 0, using 24-hour and day-of-month modes. */
regs[3] = bin2bcd(t->time.tm_sec);
regs[4] = bin2bcd(t->time.tm_min);
regs[5] = bin2bcd(t->time.tm_hour);
regs[6] = wday;
regs[7] = bin2bcd(t->time.tm_mday);
regs[8] = bin2bcd(t->time.tm_mon + 1);
/* Clear the alarm 0 interrupt flag. */
regs[6] &= ~MCP794XX_BIT_ALMX_IF;
/* Set alarm match: second, minute, hour, day, date, month. */
regs[6] |= MCP794XX_MSK_ALMX_MATCH;
/* Disable interrupt. We will not enable until completely programmed */
regs[0] &= ~MCP794XX_BIT_ALM0_EN;
ret = regmap_bulk_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
if (!t->enabled)
return 0;
regs[0] |= MCP794XX_BIT_ALM0_EN;
return regmap_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs[0]);
}
static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
int ret, reg;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
ret = regmap_read(ds1307->regmap, RX8130_REG_CONTROL0, &reg);
if (ret < 0)
return ret;
return regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
MCP794XX_BIT_ALM0_EN,
enabled ? MCP794XX_BIT_ALM0_EN : 0);
}
if (enabled)
reg |= RX8130_REG_CONTROL0_AIE;
static int m41txx_rtc_read_offset(struct device *dev, long *offset)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned int ctrl_reg;
u8 val;
regmap_read(ds1307->regmap, M41TXX_REG_CONTROL, &ctrl_reg);
val = ctrl_reg & M41TXX_M_CALIBRATION;
/* check if positive */
if (ctrl_reg & M41TXX_BIT_CALIB_SIGN)
*offset = (val * M41TXX_POS_OFFSET_STEP_PPB);
else
reg &= ~RX8130_REG_CONTROL0_AIE;
*offset = -(val * M41TXX_NEG_OFFSET_STEP_PPB);
return regmap_write(ds1307->regmap, RX8130_REG_CONTROL0, reg);
return 0;
}
static int m41txx_rtc_set_offset(struct device *dev, long offset)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned int ctrl_reg;
if ((offset < M41TXX_MIN_OFFSET) || (offset > M41TXX_MAX_OFFSET))
return -ERANGE;
if (offset >= 0) {
ctrl_reg = DIV_ROUND_CLOSEST(offset,
M41TXX_POS_OFFSET_STEP_PPB);
ctrl_reg |= M41TXX_BIT_CALIB_SIGN;
} else {
ctrl_reg = DIV_ROUND_CLOSEST(abs(offset),
M41TXX_NEG_OFFSET_STEP_PPB);
}
return regmap_update_bits(ds1307->regmap, M41TXX_REG_CONTROL,
M41TXX_M_CALIBRATION | M41TXX_BIT_CALIB_SIGN,
ctrl_reg);
}
/*----------------------------------------------------------------------*/
static const struct rtc_class_ops rx8130_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = rx8130_read_alarm,
.set_alarm = rx8130_set_alarm,
.alarm_irq_enable = rx8130_alarm_irq_enable,
};
static const struct rtc_class_ops mcp794xx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = mcp794xx_read_alarm,
.set_alarm = mcp794xx_set_alarm,
.alarm_irq_enable = mcp794xx_alarm_irq_enable,
};
static const struct rtc_class_ops m41txx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = ds1337_read_alarm,
.set_alarm = ds1337_set_alarm,
.alarm_irq_enable = ds1307_alarm_irq_enable,
.read_offset = m41txx_rtc_read_offset,
.set_offset = m41txx_rtc_set_offset,
};
static const struct chip_desc chips[last_ds_type] = {
[ds_1307] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1308] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1337] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
},
[ds_1338] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1339] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
.bbsqi_bit = DS1339_BIT_BBSQI,
.trickle_charger_reg = 0x10,
.do_trickle_setup = &do_trickle_setup_ds1339,
},
[ds_1340] = {
.century_reg = DS1307_REG_HOUR,
.century_enable_bit = DS1340_BIT_CENTURY_EN,
.century_bit = DS1340_BIT_CENTURY,
.do_trickle_setup = &do_trickle_setup_ds1339,
.trickle_charger_reg = 0x08,
},
[ds_1341] = {
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
},
[ds_1388] = {
.offset = 1,
.trickle_charger_reg = 0x0a,
},
[ds_3231] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
.bbsqi_bit = DS3231_BIT_BBSQW,
},
[rx_8130] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 4, /* 32bit (4 word x 8 bit) */
.offset = 0x10,
.irq_handler = rx8130_irq,
.rtc_ops = &rx8130_rtc_ops,
},
[m41t0] = {
.rtc_ops = &m41txx_rtc_ops,
},
[m41t00] = {
.rtc_ops = &m41txx_rtc_ops,
},
[m41t11] = {
/* this is battery backed SRAM */
.nvram_offset = 8,
.nvram_size = 56,
.rtc_ops = &m41txx_rtc_ops,
},
[mcp794xx] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 0x40,
.irq_handler = mcp794xx_irq,
.rtc_ops = &mcp794xx_rtc_ops,
},
};
static const struct i2c_device_id ds1307_id[] = {
{ "ds1307", ds_1307 },
{ "ds1308", ds_1308 },
{ "ds1337", ds_1337 },
{ "ds1338", ds_1338 },
{ "ds1339", ds_1339 },
{ "ds1388", ds_1388 },
{ "ds1340", ds_1340 },
{ "ds1341", ds_1341 },
{ "ds3231", ds_3231 },
{ "m41t0", m41t0 },
{ "m41t00", m41t00 },
{ "m41t11", m41t11 },
{ "mcp7940x", mcp794xx },
{ "mcp7941x", mcp794xx },
{ "pt7c4338", ds_1307 },
{ "rx8025", rx_8025 },
{ "isl12057", ds_1337 },
{ "rx8130", rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ds1307_id);
#ifdef CONFIG_OF
static const struct of_device_id ds1307_of_match[] = {
{
.compatible = "dallas,ds1307",
.data = (void *)ds_1307
},
{
.compatible = "dallas,ds1308",
.data = (void *)ds_1308
},
{
.compatible = "dallas,ds1337",
.data = (void *)ds_1337
},
{
.compatible = "dallas,ds1338",
.data = (void *)ds_1338
},
{
.compatible = "dallas,ds1339",
.data = (void *)ds_1339
},
{
.compatible = "dallas,ds1388",
.data = (void *)ds_1388
},
{
.compatible = "dallas,ds1340",
.data = (void *)ds_1340
},
{
.compatible = "dallas,ds1341",
.data = (void *)ds_1341
},
{
.compatible = "maxim,ds3231",
.data = (void *)ds_3231
},
{
.compatible = "st,m41t0",
.data = (void *)m41t0
},
{
.compatible = "st,m41t00",
.data = (void *)m41t00
},
{
.compatible = "st,m41t11",
.data = (void *)m41t11
},
{
.compatible = "microchip,mcp7940x",
.data = (void *)mcp794xx
},
{
.compatible = "microchip,mcp7941x",
.data = (void *)mcp794xx
},
{
.compatible = "pericom,pt7c4338",
.data = (void *)ds_1307
},
{
.compatible = "epson,rx8025",
.data = (void *)rx_8025
},
{
.compatible = "isil,isl12057",
.data = (void *)ds_1337
},
{
.compatible = "epson,rx8130",
.data = (void *)rx_8130
},
{ }
};
MODULE_DEVICE_TABLE(of, ds1307_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id ds1307_acpi_ids[] = {
{ .id = "DS1307", .driver_data = ds_1307 },
{ .id = "DS1308", .driver_data = ds_1308 },
{ .id = "DS1337", .driver_data = ds_1337 },
{ .id = "DS1338", .driver_data = ds_1338 },
{ .id = "DS1339", .driver_data = ds_1339 },
{ .id = "DS1388", .driver_data = ds_1388 },
{ .id = "DS1340", .driver_data = ds_1340 },
{ .id = "DS1341", .driver_data = ds_1341 },
{ .id = "DS3231", .driver_data = ds_3231 },
{ .id = "M41T0", .driver_data = m41t0 },
{ .id = "M41T00", .driver_data = m41t00 },
{ .id = "M41T11", .driver_data = m41t11 },
{ .id = "MCP7940X", .driver_data = mcp794xx },
{ .id = "MCP7941X", .driver_data = mcp794xx },
{ .id = "PT7C4338", .driver_data = ds_1307 },
{ .id = "RX8025", .driver_data = rx_8025 },
{ .id = "ISL12057", .driver_data = ds_1337 },
{ .id = "RX8130", .driver_data = rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(acpi, ds1307_acpi_ids);
#endif
/*
* Alarm support for mcp794xx devices.
* The ds1337 and ds1339 both have two alarms, but we only use the first
* one (with a "seconds" field). For ds1337 we expect nINTA is our alarm
* signal; ds1339 chips have only one alarm signal.
*/
static irqreturn_t mcp794xx_irq(int irq, void *dev_id)
static irqreturn_t ds1307_irq(int irq, void *dev_id)
{
struct ds1307 *ds1307 = dev_id;
struct mutex *lock = &ds1307->rtc->ops_lock;
int reg, ret;
int stat, ret;
mutex_lock(lock);
/* Check and clear alarm 0 interrupt flag. */
ret = regmap_read(ds1307->regmap, MCP794XX_REG_ALARM0_CTRL, &reg);
if (ret)
goto out;
if (!(reg & MCP794XX_BIT_ALMX_IF))
goto out;
reg &= ~MCP794XX_BIT_ALMX_IF;
ret = regmap_write(ds1307->regmap, MCP794XX_REG_ALARM0_CTRL, reg);
ret = regmap_read(ds1307->regmap, DS1337_REG_STATUS, &stat);
if (ret)
goto out;
/* Disable alarm 0. */
ret = regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
MCP794XX_BIT_ALM0_EN, 0);
if (stat & DS1337_BIT_A1I) {
stat &= ~DS1337_BIT_A1I;
regmap_write(ds1307->regmap, DS1337_REG_STATUS, stat);
ret = regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
DS1337_BIT_A1IE, 0);
if (ret)
goto out;
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
}
out:
mutex_unlock(lock);
......@@ -888,167 +1036,15 @@ static irqreturn_t mcp794xx_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
u8 regs[10];
int ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
/* Read control and alarm 0 registers. */
ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
t->enabled = !!(regs[0] & MCP794XX_BIT_ALM0_EN);
/* Report alarm 0 time assuming 24-hour and day-of-month modes. */
t->time.tm_sec = bcd2bin(regs[3] & 0x7f);
t->time.tm_min = bcd2bin(regs[4] & 0x7f);
t->time.tm_hour = bcd2bin(regs[5] & 0x3f);
t->time.tm_wday = bcd2bin(regs[6] & 0x7) - 1;
t->time.tm_mday = bcd2bin(regs[7] & 0x3f);
t->time.tm_mon = bcd2bin(regs[8] & 0x1f) - 1;
t->time.tm_year = -1;
t->time.tm_yday = -1;
t->time.tm_isdst = -1;
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
"enabled=%d polarity=%d irq=%d match=%lu\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, t->enabled,
!!(regs[6] & MCP794XX_BIT_ALMX_POL),
!!(regs[6] & MCP794XX_BIT_ALMX_IF),
(regs[6] & MCP794XX_MSK_ALMX_MATCH) >> 4);
return 0;
}
/*
* We may have a random RTC weekday, therefore calculate alarm weekday based
* on current weekday we read from the RTC timekeeping regs
*/
static int mcp794xx_alm_weekday(struct device *dev, struct rtc_time *tm_alarm)
{
struct rtc_time tm_now;
int days_now, days_alarm, ret;
ret = ds1307_get_time(dev, &tm_now);
if (ret)
return ret;
days_now = div_s64(rtc_tm_to_time64(&tm_now), 24 * 60 * 60);
days_alarm = div_s64(rtc_tm_to_time64(tm_alarm), 24 * 60 * 60);
return (tm_now.tm_wday + days_alarm - days_now) % 7 + 1;
}
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned char regs[10];
int wday, ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
wday = mcp794xx_alm_weekday(dev, &t->time);
if (wday < 0)
return wday;
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
"enabled=%d pending=%d\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon,
t->enabled, t->pending);
/* Read control and alarm 0 registers. */
ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
/* Set alarm 0, using 24-hour and day-of-month modes. */
regs[3] = bin2bcd(t->time.tm_sec);
regs[4] = bin2bcd(t->time.tm_min);
regs[5] = bin2bcd(t->time.tm_hour);
regs[6] = wday;
regs[7] = bin2bcd(t->time.tm_mday);
regs[8] = bin2bcd(t->time.tm_mon + 1);
/* Clear the alarm 0 interrupt flag. */
regs[6] &= ~MCP794XX_BIT_ALMX_IF;
/* Set alarm match: second, minute, hour, day, date, month. */
regs[6] |= MCP794XX_MSK_ALMX_MATCH;
/* Disable interrupt. We will not enable until completely programmed */
regs[0] &= ~MCP794XX_BIT_ALM0_EN;
ret = regmap_bulk_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
sizeof(regs));
if (ret)
return ret;
if (!t->enabled)
return 0;
regs[0] |= MCP794XX_BIT_ALM0_EN;
return regmap_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs[0]);
}
static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
return regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
MCP794XX_BIT_ALM0_EN,
enabled ? MCP794XX_BIT_ALM0_EN : 0);
}
static int m41txx_rtc_read_offset(struct device *dev, long *offset)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned int ctrl_reg;
u8 val;
regmap_read(ds1307->regmap, M41TXX_REG_CONTROL, &ctrl_reg);
val = ctrl_reg & M41TXX_M_CALIBRATION;
/* check if positive */
if (ctrl_reg & M41TXX_BIT_CALIB_SIGN)
*offset = (val * M41TXX_POS_OFFSET_STEP_PPB);
else
*offset = -(val * M41TXX_NEG_OFFSET_STEP_PPB);
return 0;
}
static int m41txx_rtc_set_offset(struct device *dev, long offset)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned int ctrl_reg;
if ((offset < M41TXX_MIN_OFFSET) || (offset > M41TXX_MAX_OFFSET))
return -ERANGE;
if (offset >= 0) {
ctrl_reg = DIV_ROUND_CLOSEST(offset,
M41TXX_POS_OFFSET_STEP_PPB);
ctrl_reg |= M41TXX_BIT_CALIB_SIGN;
} else {
ctrl_reg = DIV_ROUND_CLOSEST(abs(offset),
M41TXX_NEG_OFFSET_STEP_PPB);
}
/*----------------------------------------------------------------------*/
return regmap_update_bits(ds1307->regmap, M41TXX_REG_CONTROL,
M41TXX_M_CALIBRATION | M41TXX_BIT_CALIB_SIGN,
ctrl_reg);
}
static const struct rtc_class_ops ds13xx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = ds1337_read_alarm,
.set_alarm = ds1337_set_alarm,
.alarm_irq_enable = ds1307_alarm_irq_enable,
};
static ssize_t frequency_test_store(struct device *dev,
struct device_attribute *attr,
......@@ -1137,30 +1133,6 @@ static int ds1307_nvram_write(void *priv, unsigned int offset, void *val,
/*----------------------------------------------------------------------*/
static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307,
u32 ohms, bool diode)
{
u8 setup = (diode) ? DS1307_TRICKLE_CHARGER_DIODE :
DS1307_TRICKLE_CHARGER_NO_DIODE;
switch (ohms) {
case 250:
setup |= DS1307_TRICKLE_CHARGER_250_OHM;
break;
case 2000:
setup |= DS1307_TRICKLE_CHARGER_2K_OHM;
break;
case 4000:
setup |= DS1307_TRICKLE_CHARGER_4K_OHM;
break;
default:
dev_warn(ds1307->dev,
"Unsupported ohm value %u in dt\n", ohms);
return 0;
}
return setup;
}
static u8 ds1307_trickle_init(struct ds1307 *ds1307,
const struct chip_desc *chip)
{
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7