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path: root/drivers/rtc/rtc-ds1307.c
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Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
-rw-r--r--drivers/rtc/rtc-ds1307.c957
1 files changed, 439 insertions, 518 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 77339b3d50a1..4fac49e55d47 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -24,6 +24,7 @@
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/clk-provider.h>
+#include <linux/regmap.h>
/*
* We can't determine type by probing, but if we expect pre-Linux code
@@ -33,6 +34,7 @@
*/
enum ds_type {
ds_1307,
+ ds_1308,
ds_1337,
ds_1338,
ds_1339,
@@ -43,6 +45,7 @@ enum ds_type {
m41t00,
mcp794xx,
rx_8025,
+ rx_8130,
last_ds_type /* always last */
/* rs5c372 too? different address... */
};
@@ -115,17 +118,16 @@ struct ds1307 {
u8 offset; /* register's offset */
u8 regs[11];
u16 nvram_offset;
- struct bin_attribute *nvram;
+ struct nvmem_config nvmem_cfg;
enum ds_type type;
unsigned long flags;
#define HAS_NVRAM 0 /* bit 0 == sysfs file active */
#define HAS_ALARM 1 /* bit 1 == irq claimed */
- struct i2c_client *client;
+ struct device *dev;
+ struct regmap *regmap;
+ const char *name;
+ int irq;
struct rtc_device *rtc;
- s32 (*read_block_data)(const struct i2c_client *client, u8 command,
- u8 length, u8 *values);
- s32 (*write_block_data)(const struct i2c_client *client, u8 command,
- u8 length, const u8 *values);
#ifdef CONFIG_COMMON_CLK
struct clk_hw clks[2];
#endif
@@ -135,21 +137,30 @@ struct chip_desc {
unsigned alarm:1;
u16 nvram_offset;
u16 nvram_size;
+ u8 century_reg;
+ u8 century_enable_bit;
+ u8 century_bit;
u16 trickle_charger_reg;
u8 trickle_charger_setup;
- u8 (*do_trickle_setup)(struct i2c_client *, uint32_t, bool);
+ u8 (*do_trickle_setup)(struct ds1307 *, uint32_t,
+ bool);
};
-static u8 do_trickle_setup_ds1339(struct i2c_client *,
- uint32_t ohms, bool diode);
+static u8 do_trickle_setup_ds1339(struct ds1307 *, uint32_t ohms, bool diode);
static 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,
@@ -157,10 +168,15 @@ static struct chip_desc chips[last_ds_type] = {
},
[ds_1339] = {
.alarm = 1,
+ .century_reg = DS1307_REG_MONTH,
+ .century_bit = DS1337_BIT_CENTURY,
.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,
.trickle_charger_reg = 0x08,
},
[ds_1388] = {
@@ -168,6 +184,14 @@ static struct chip_desc chips[last_ds_type] = {
},
[ds_3231] = {
.alarm = 1,
+ .century_reg = DS1307_REG_MONTH,
+ .century_bit = DS1337_BIT_CENTURY,
+ },
+ [rx_8130] = {
+ .alarm = 1,
+ /* this is battery backed SRAM */
+ .nvram_offset = 0x20,
+ .nvram_size = 4, /* 32bit (4 word x 8 bit) */
},
[mcp794xx] = {
.alarm = 1,
@@ -179,6 +203,7 @@ static struct chip_desc chips[last_ds_type] = {
static const struct i2c_device_id ds1307_id[] = {
{ "ds1307", ds_1307 },
+ { "ds1308", ds_1308 },
{ "ds1337", ds_1337 },
{ "ds1338", ds_1338 },
{ "ds1339", ds_1339 },
@@ -192,6 +217,7 @@ static const struct i2c_device_id ds1307_id[] = {
{ "pt7c4338", ds_1307 },
{ "rx8025", rx_8025 },
{ "isl12057", ds_1337 },
+ { "rx8130", rx_8130 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ds1307_id);
@@ -203,6 +229,10 @@ static const struct of_device_id ds1307_of_match[] = {
.data = (void *)ds_1307
},
{
+ .compatible = "dallas,ds1308",
+ .data = (void *)ds_1308
+ },
+ {
.compatible = "dallas,ds1337",
.data = (void *)ds_1337
},
@@ -262,6 +292,7 @@ MODULE_DEVICE_TABLE(of, ds1307_of_match);
#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 },
@@ -280,136 +311,6 @@ static const struct acpi_device_id ds1307_acpi_ids[] = {
MODULE_DEVICE_TABLE(acpi, ds1307_acpi_ids);
#endif
-/*----------------------------------------------------------------------*/
-
-#define BLOCK_DATA_MAX_TRIES 10
-
-static s32 ds1307_read_block_data_once(const struct i2c_client *client,
- u8 command, u8 length, u8 *values)
-{
- s32 i, data;
-
- for (i = 0; i < length; i++) {
- data = i2c_smbus_read_byte_data(client, command + i);
- if (data < 0)
- return data;
- values[i] = data;
- }
- return i;
-}
-
-static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command,
- u8 length, u8 *values)
-{
- u8 oldvalues[255];
- s32 ret;
- int tries = 0;
-
- dev_dbg(&client->dev, "ds1307_read_block_data (length=%d)\n", length);
- ret = ds1307_read_block_data_once(client, command, length, values);
- if (ret < 0)
- return ret;
- do {
- if (++tries > BLOCK_DATA_MAX_TRIES) {
- dev_err(&client->dev,
- "ds1307_read_block_data failed\n");
- return -EIO;
- }
- memcpy(oldvalues, values, length);
- ret = ds1307_read_block_data_once(client, command, length,
- values);
- if (ret < 0)
- return ret;
- } while (memcmp(oldvalues, values, length));
- return length;
-}
-
-static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command,
- u8 length, const u8 *values)
-{
- u8 currvalues[255];
- int tries = 0;
-
- dev_dbg(&client->dev, "ds1307_write_block_data (length=%d)\n", length);
- do {
- s32 i, ret;
-
- if (++tries > BLOCK_DATA_MAX_TRIES) {
- dev_err(&client->dev,
- "ds1307_write_block_data failed\n");
- return -EIO;
- }
- for (i = 0; i < length; i++) {
- ret = i2c_smbus_write_byte_data(client, command + i,
- values[i]);
- if (ret < 0)
- return ret;
- }
- ret = ds1307_read_block_data_once(client, command, length,
- currvalues);
- if (ret < 0)
- return ret;
- } while (memcmp(currvalues, values, length));
- return length;
-}
-
-/*----------------------------------------------------------------------*/
-
-/* These RTC devices are not designed to be connected to a SMbus adapter.
- SMbus limits block operations length to 32 bytes, whereas it's not
- limited on I2C buses. As a result, accesses may exceed 32 bytes;
- in that case, split them into smaller blocks */
-
-static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client,
- u8 command, u8 length, const u8 *values)
-{
- u8 suboffset = 0;
-
- if (length <= I2C_SMBUS_BLOCK_MAX) {
- s32 retval = i2c_smbus_write_i2c_block_data(client,
- command, length, values);
- if (retval < 0)
- return retval;
- return length;
- }
-
- while (suboffset < length) {
- s32 retval = i2c_smbus_write_i2c_block_data(client,
- command + suboffset,
- min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
- values + suboffset);
- if (retval < 0)
- return retval;
-
- suboffset += I2C_SMBUS_BLOCK_MAX;
- }
- return length;
-}
-
-static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client,
- u8 command, u8 length, u8 *values)
-{
- u8 suboffset = 0;
-
- if (length <= I2C_SMBUS_BLOCK_MAX)
- return i2c_smbus_read_i2c_block_data(client,
- command, length, values);
-
- while (suboffset < length) {
- s32 retval = i2c_smbus_read_i2c_block_data(client,
- command + suboffset,
- min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
- values + suboffset);
- if (retval < 0)
- return retval;
-
- suboffset += I2C_SMBUS_BLOCK_MAX;
- }
- return length;
-}
-
-/*----------------------------------------------------------------------*/
-
/*
* 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
@@ -417,27 +318,24 @@ static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client,
*/
static irqreturn_t ds1307_irq(int irq, void *dev_id)
{
- struct i2c_client *client = dev_id;
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ struct ds1307 *ds1307 = dev_id;
struct mutex *lock = &ds1307->rtc->ops_lock;
- int stat, control;
+ int stat, ret;
mutex_lock(lock);
- stat = i2c_smbus_read_byte_data(client, DS1337_REG_STATUS);
- if (stat < 0)
+ ret = regmap_read(ds1307->regmap, DS1337_REG_STATUS, &stat);
+ if (ret)
goto out;
if (stat & DS1337_BIT_A1I) {
stat &= ~DS1337_BIT_A1I;
- i2c_smbus_write_byte_data(client, DS1337_REG_STATUS, stat);
+ regmap_write(ds1307->regmap, DS1337_REG_STATUS, stat);
- control = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
- if (control < 0)
+ ret = regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
+ DS1337_BIT_A1IE, 0);
+ if (ret)
goto out;
- control &= ~DS1337_BIT_A1IE;
- i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
-
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
}
@@ -452,14 +350,14 @@ out:
static int ds1307_get_time(struct device *dev, struct rtc_time *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
- int tmp;
+ int tmp, ret;
+ const struct chip_desc *chip = &chips[ds1307->type];
/* read the RTC date and time registers all at once */
- tmp = ds1307->read_block_data(ds1307->client,
- ds1307->offset, 7, ds1307->regs);
- if (tmp != 7) {
- dev_err(dev, "%s error %d\n", "read", tmp);
- return -EIO;
+ ret = regmap_bulk_read(ds1307->regmap, ds1307->offset, ds1307->regs, 7);
+ if (ret) {
+ dev_err(dev, "%s error %d\n", "read", ret);
+ return ret;
}
dev_dbg(dev, "%s: %7ph\n", "read", ds1307->regs);
@@ -481,22 +379,9 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
t->tm_mon = bcd2bin(tmp) - 1;
t->tm_year = bcd2bin(ds1307->regs[DS1307_REG_YEAR]) + 100;
-#ifdef CONFIG_RTC_DRV_DS1307_CENTURY
- switch (ds1307->type) {
- case ds_1337:
- case ds_1339:
- case ds_3231:
- if (ds1307->regs[DS1307_REG_MONTH] & DS1337_BIT_CENTURY)
- t->tm_year += 100;
- break;
- case ds_1340:
- if (ds1307->regs[DS1307_REG_HOUR] & DS1340_BIT_CENTURY)
- t->tm_year += 100;
- break;
- default:
- break;
- }
-#endif
+ if (ds1307->regs[chip->century_reg] & chip->century_bit &&
+ IS_ENABLED(CONFIG_RTC_DRV_DS1307_CENTURY))
+ t->tm_year += 100;
dev_dbg(dev, "%s secs=%d, mins=%d, "
"hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
@@ -511,6 +396,7 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
static int ds1307_set_time(struct device *dev, struct rtc_time *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ const struct chip_desc *chip = &chips[ds1307->type];
int result;
int tmp;
u8 *buf = ds1307->regs;
@@ -521,24 +407,14 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
t->tm_hour, t->tm_mday,
t->tm_mon, t->tm_year, t->tm_wday);
-#ifdef CONFIG_RTC_DRV_DS1307_CENTURY
if (t->tm_year < 100)
return -EINVAL;
- switch (ds1307->type) {
- case ds_1337:
- case ds_1339:
- case ds_3231:
- case ds_1340:
- if (t->tm_year > 299)
- return -EINVAL;
- default:
- if (t->tm_year > 199)
- return -EINVAL;
- break;
- }
+#ifdef CONFIG_RTC_DRV_DS1307_CENTURY
+ if (t->tm_year > (chip->century_bit ? 299 : 199))
+ return -EINVAL;
#else
- if (t->tm_year < 100 || t->tm_year > 199)
+ if (t->tm_year > 199)
return -EINVAL;
#endif
@@ -553,19 +429,12 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
tmp = t->tm_year - 100;
buf[DS1307_REG_YEAR] = bin2bcd(tmp);
- switch (ds1307->type) {
- case ds_1337:
- case ds_1339:
- case ds_3231:
- if (t->tm_year > 199)
- buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY;
- break;
- case ds_1340:
- buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN;
- if (t->tm_year > 199)
- buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY;
- break;
- case mcp794xx:
+ if (chip->century_enable_bit)
+ buf[chip->century_reg] |= chip->century_enable_bit;
+ if (t->tm_year > 199 && chip->century_bit)
+ buf[chip->century_reg] |= chip->century_bit;
+
+ if (ds1307->type == mcp794xx) {
/*
* these bits were cleared when preparing the date/time
* values and need to be set again before writing the
@@ -573,16 +442,12 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
*/
buf[DS1307_REG_SECS] |= MCP794XX_BIT_ST;
buf[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN;
- break;
- default:
- break;
}
dev_dbg(dev, "%s: %7ph\n", "write", buf);
- result = ds1307->write_block_data(ds1307->client,
- ds1307->offset, 7, buf);
- if (result < 0) {
+ result = regmap_bulk_write(ds1307->regmap, ds1307->offset, buf, 7);
+ if (result) {
dev_err(dev, "%s error %d\n", "write", result);
return result;
}
@@ -591,19 +456,18 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
int ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
/* read all ALARM1, ALARM2, and status registers at once */
- ret = ds1307->read_block_data(client,
- DS1339_REG_ALARM1_SECS, 9, ds1307->regs);
- if (ret != 9) {
+ ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS,
+ ds1307->regs, 9);
+ if (ret) {
dev_err(dev, "%s error %d\n", "alarm read", ret);
- return -EIO;
+ return ret;
}
dev_dbg(dev, "%s: %4ph, %3ph, %2ph\n", "alarm read",
@@ -633,8 +497,7 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned char *buf = ds1307->regs;
u8 control, status;
int ret;
@@ -649,11 +512,10 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* read current status of both alarms and the chip */
- ret = ds1307->read_block_data(client,
- DS1339_REG_ALARM1_SECS, 9, buf);
- if (ret != 9) {
+ ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS, buf, 9);
+ if (ret) {
dev_err(dev, "%s error %d\n", "alarm write", ret);
- return -EIO;
+ return ret;
}
control = ds1307->regs[7];
status = ds1307->regs[8];
@@ -676,9 +538,8 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
buf[7] = control & ~(DS1337_BIT_A1IE | DS1337_BIT_A2IE);
buf[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I);
- ret = ds1307->write_block_data(client,
- DS1339_REG_ALARM1_SECS, 9, buf);
- if (ret < 0) {
+ ret = regmap_bulk_write(ds1307->regmap, DS1339_REG_ALARM1_SECS, buf, 9);
+ if (ret) {
dev_err(dev, "can't set alarm time\n");
return ret;
}
@@ -687,7 +548,7 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
if (t->enabled) {
dev_dbg(dev, "alarm IRQ armed\n");
buf[7] |= DS1337_BIT_A1IE; /* only ALARM1 is used */
- i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, buf[7]);
+ regmap_write(ds1307->regmap, DS1337_REG_CONTROL, buf[7]);
}
return 0;
@@ -695,35 +556,181 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
- int ret;
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -ENOTTY;
- ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
+ return regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
+ DS1337_BIT_A1IE,
+ 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,
+};
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * Alarm support for rx8130 devices.
+ */
+
+#define RX8130_REG_ALARM_MIN 0x07
+#define RX8130_REG_ALARM_HOUR 0x08
+#define RX8130_REG_ALARM_WEEK_OR_DAY 0x09
+#define RX8130_REG_EXTENSION 0x0c
+#define RX8130_REG_EXTENSION_WADA (1 << 3)
+#define RX8130_REG_FLAG 0x0d
+#define RX8130_REG_FLAG_AF (1 << 3)
+#define RX8130_REG_CONTROL0 0x0e
+#define RX8130_REG_CONTROL0_AIE (1 << 3)
+
+static irqreturn_t rx8130_irq(int irq, void *dev_id)
+{
+ struct ds1307 *ds1307 = dev_id;
+ struct mutex *lock = &ds1307->rtc->ops_lock;
+ u8 ctl[3];
+ int ret;
+
+ mutex_lock(lock);
+
+ /* Read control registers. */
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
if (ret < 0)
- return ret;
+ goto out;
+ if (!(ctl[1] & RX8130_REG_FLAG_AF))
+ goto out;
+ ctl[1] &= ~RX8130_REG_FLAG_AF;
+ ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
- if (enabled)
- ret |= DS1337_BIT_A1IE;
- else
- ret &= ~DS1337_BIT_A1IE;
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ if (ret < 0)
+ goto out;
+
+ rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
+
+out:
+ mutex_unlock(lock);
+
+ return IRQ_HANDLED;
+}
- ret = i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, ret);
+static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ u8 ald[3], ctl[3];
+ int ret;
+
+ if (!test_bit(HAS_ALARM, &ds1307->flags))
+ return -EINVAL;
+
+ /* Read alarm registers. */
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
if (ret < 0)
return ret;
+ /* Read control registers. */
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ if (ret < 0)
+ return ret;
+
+ t->enabled = !!(ctl[2] & RX8130_REG_CONTROL0_AIE);
+ t->pending = !!(ctl[1] & RX8130_REG_FLAG_AF);
+
+ /* Report alarm 0 time assuming 24-hour and day-of-month modes. */
+ t->time.tm_sec = -1;
+ t->time.tm_min = bcd2bin(ald[0] & 0x7f);
+ t->time.tm_hour = bcd2bin(ald[1] & 0x7f);
+ t->time.tm_wday = -1;
+ t->time.tm_mday = bcd2bin(ald[2] & 0x7f);
+ t->time.tm_mon = -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\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);
+
return 0;
}
-static const struct rtc_class_ops ds13xx_rtc_ops = {
+static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ u8 ald[3], ctl[3];
+ int ret;
+
+ if (!test_bit(HAS_ALARM, &ds1307->flags))
+ return -EINVAL;
+
+ 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 registers. */
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ if (ret < 0)
+ return ret;
+
+ ctl[0] &= ~RX8130_REG_EXTENSION_WADA;
+ ctl[1] |= RX8130_REG_FLAG_AF;
+ ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
+
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ if (ret < 0)
+ return ret;
+
+ /* Hardware alarm precision is 1 minute! */
+ ald[0] = bin2bcd(t->time.tm_min);
+ ald[1] = bin2bcd(t->time.tm_hour);
+ ald[2] = bin2bcd(t->time.tm_mday);
+
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
+ if (ret < 0)
+ return ret;
+
+ if (!t->enabled)
+ return 0;
+
+ ctl[2] |= RX8130_REG_CONTROL0_AIE;
+
+ return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+}
+
+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 const struct rtc_class_ops rx8130_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_alarm = rx8130_read_alarm,
+ .set_alarm = rx8130_set_alarm,
+ .alarm_irq_enable = rx8130_alarm_irq_enable,
};
/*----------------------------------------------------------------------*/
@@ -752,31 +759,27 @@ static const struct rtc_class_ops ds13xx_rtc_ops = {
static irqreturn_t mcp794xx_irq(int irq, void *dev_id)
{
- struct i2c_client *client = dev_id;
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ 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. */
- reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_ALARM0_CTRL);
- if (reg < 0)
+ 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 = i2c_smbus_write_byte_data(client, MCP794XX_REG_ALARM0_CTRL, reg);
- if (ret < 0)
+ ret = regmap_write(ds1307->regmap, MCP794XX_REG_ALARM0_CTRL, reg);
+ if (ret)
goto out;
/* Disable alarm 0. */
- reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_CONTROL);
- if (reg < 0)
- goto out;
- reg &= ~MCP794XX_BIT_ALM0_EN;
- ret = i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, reg);
- if (ret < 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);
@@ -789,8 +792,7 @@ out:
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
u8 *regs = ds1307->regs;
int ret;
@@ -798,8 +800,8 @@ static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
return -EINVAL;
/* Read control and alarm 0 registers. */
- ret = ds1307->read_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
- if (ret < 0)
+ ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ if (ret)
return ret;
t->enabled = !!(regs[0] & MCP794XX_BIT_ALM0_EN);
@@ -828,8 +830,7 @@ static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
unsigned char *regs = ds1307->regs;
int ret;
@@ -843,8 +844,8 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* Read control and alarm 0 registers. */
- ret = ds1307->read_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
- if (ret < 0)
+ ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ if (ret)
return ret;
/* Set alarm 0, using 24-hour and day-of-month modes. */
@@ -862,35 +863,26 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
/* Disable interrupt. We will not enable until completely programmed */
regs[0] &= ~MCP794XX_BIT_ALM0_EN;
- ret = ds1307->write_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
- if (ret < 0)
+ ret = regmap_bulk_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ if (ret)
return ret;
if (!t->enabled)
return 0;
regs[0] |= MCP794XX_BIT_ALM0_EN;
- return i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, regs[0]);
+ return regmap_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs[0]);
}
static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
- int reg;
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
- reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_CONTROL);
- if (reg < 0)
- return reg;
-
- if (enabled)
- reg |= MCP794XX_BIT_ALM0_EN;
- else
- reg &= ~MCP794XX_BIT_ALM0_EN;
-
- return i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, reg);
+ return regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
+ MCP794XX_BIT_ALM0_EN,
+ enabled ? MCP794XX_BIT_ALM0_EN : 0);
}
static const struct rtc_class_ops mcp794xx_rtc_ops = {
@@ -903,50 +895,27 @@ static const struct rtc_class_ops mcp794xx_rtc_ops = {
/*----------------------------------------------------------------------*/
-static ssize_t
-ds1307_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1307_nvram_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
{
- struct i2c_client *client;
- struct ds1307 *ds1307;
- int result;
+ struct ds1307 *ds1307 = priv;
- client = kobj_to_i2c_client(kobj);
- ds1307 = i2c_get_clientdata(client);
-
- result = ds1307->read_block_data(client, ds1307->nvram_offset + off,
- count, buf);
- if (result < 0)
- dev_err(&client->dev, "%s error %d\n", "nvram read", result);
- return result;
+ return regmap_bulk_read(ds1307->regmap, ds1307->nvram_offset + offset,
+ val, bytes);
}
-static ssize_t
-ds1307_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr,
- char *buf, loff_t off, size_t count)
+static int ds1307_nvram_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
{
- struct i2c_client *client;
- struct ds1307 *ds1307;
- int result;
+ struct ds1307 *ds1307 = priv;
- client = kobj_to_i2c_client(kobj);
- ds1307 = i2c_get_clientdata(client);
-
- result = ds1307->write_block_data(client, ds1307->nvram_offset + off,
- count, buf);
- if (result < 0) {
- dev_err(&client->dev, "%s error %d\n", "nvram write", result);
- return result;
- }
- return count;
+ return regmap_bulk_write(ds1307->regmap, ds1307->nvram_offset + offset,
+ val, bytes);
}
-
/*----------------------------------------------------------------------*/
-static u8 do_trickle_setup_ds1339(struct i2c_client *client,
+static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307,
uint32_t ohms, bool diode)
{
u8 setup = (diode) ? DS1307_TRICKLE_CHARGER_DIODE :
@@ -963,14 +932,14 @@ static u8 do_trickle_setup_ds1339(struct i2c_client *client,
setup |= DS1307_TRICKLE_CHARGER_4K_OHM;
break;
default:
- dev_warn(&client->dev,
+ dev_warn(ds1307->dev,
"Unsupported ohm value %u in dt\n", ohms);
return 0;
}
return setup;
}
-static void ds1307_trickle_init(struct i2c_client *client,
+static void ds1307_trickle_init(struct ds1307 *ds1307,
struct chip_desc *chip)
{
uint32_t ohms = 0;
@@ -978,11 +947,12 @@ static void ds1307_trickle_init(struct i2c_client *client,
if (!chip->do_trickle_setup)
goto out;
- if (device_property_read_u32(&client->dev, "trickle-resistor-ohms", &ohms))
+ if (device_property_read_u32(ds1307->dev, "trickle-resistor-ohms",
+ &ohms))
goto out;
- if (device_property_read_bool(&client->dev, "trickle-diode-disable"))
+ if (device_property_read_bool(ds1307->dev, "trickle-diode-disable"))
diode = false;
- chip->trickle_charger_setup = chip->do_trickle_setup(client,
+ chip->trickle_charger_setup = chip->do_trickle_setup(ds1307,
ohms, diode);
out:
return;
@@ -1009,13 +979,10 @@ static int ds3231_hwmon_read_temp(struct device *dev, s32 *mC)
s16 temp;
int ret;
- ret = ds1307->read_block_data(ds1307->client, DS3231_REG_TEMPERATURE,
- sizeof(temp_buf), temp_buf);
- if (ret < 0)
+ ret = regmap_bulk_read(ds1307->regmap, DS3231_REG_TEMPERATURE,
+ temp_buf, sizeof(temp_buf));
+ if (ret)
return ret;
- if (ret != sizeof(temp_buf))
- return -EIO;
-
/*
* Temperature is represented as a 10-bit code with a resolution of
* 0.25 degree celsius and encoded in two's complement format.
@@ -1055,12 +1022,11 @@ static void ds1307_hwmon_register(struct ds1307 *ds1307)
if (ds1307->type != ds_3231)
return;
- dev = devm_hwmon_device_register_with_groups(&ds1307->client->dev,
- ds1307->client->name,
+ dev = devm_hwmon_device_register_with_groups(ds1307->dev, ds1307->name,
ds1307, ds3231_hwmon_groups);
if (IS_ERR(dev)) {
- dev_warn(&ds1307->client->dev,
- "unable to register hwmon device %ld\n", PTR_ERR(dev));
+ dev_warn(ds1307->dev, "unable to register hwmon device %ld\n",
+ PTR_ERR(dev));
}
}
@@ -1099,24 +1065,12 @@ static int ds3231_clk_sqw_rates[] = {
static int ds1337_write_control(struct ds1307 *ds1307, u8 mask, u8 value)
{
- struct i2c_client *client = ds1307->client;
struct mutex *lock = &ds1307->rtc->ops_lock;
- int control;
int ret;
mutex_lock(lock);
-
- control = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
- if (control < 0) {
- ret = control;
- goto out;
- }
-
- control &= ~mask;
- control |= value;
-
- ret = i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
-out:
+ ret = regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
+ mask, value);
mutex_unlock(lock);
return ret;
@@ -1126,12 +1080,12 @@ static unsigned long ds3231_clk_sqw_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct ds1307 *ds1307 = clk_sqw_to_ds1307(hw);
- int control;
+ int control, ret;
int rate_sel = 0;
- control = i2c_smbus_read_byte_data(ds1307->client, DS1337_REG_CONTROL);
- if (control < 0)
- return control;
+ ret = regmap_read(ds1307->regmap, DS1337_REG_CONTROL, &control);
+ if (ret)
+ return ret;
if (control & DS1337_BIT_RS1)
rate_sel += 1;
if (control & DS1337_BIT_RS2)
@@ -1195,11 +1149,11 @@ static void ds3231_clk_sqw_unprepare(struct clk_hw *hw)
static int ds3231_clk_sqw_is_prepared(struct clk_hw *hw)
{
struct ds1307 *ds1307 = clk_sqw_to_ds1307(hw);
- int control;
+ int control, ret;
- control = i2c_smbus_read_byte_data(ds1307->client, DS1337_REG_CONTROL);
- if (control < 0)
- return control;
+ ret = regmap_read(ds1307->regmap, DS1337_REG_CONTROL, &control);
+ if (ret)
+ return ret;
return !(control & DS1337_BIT_INTCN);
}
@@ -1221,26 +1175,13 @@ static unsigned long ds3231_clk_32khz_recalc_rate(struct clk_hw *hw,
static int ds3231_clk_32khz_control(struct ds1307 *ds1307, bool enable)
{
- struct i2c_client *client = ds1307->client;
struct mutex *lock = &ds1307->rtc->ops_lock;
- int status;
int ret;
mutex_lock(lock);
-
- status = i2c_smbus_read_byte_data(client, DS1337_REG_STATUS);
- if (status < 0) {
- ret = status;
- goto out;
- }
-
- if (enable)
- status |= DS3231_BIT_EN32KHZ;
- else
- status &= ~DS3231_BIT_EN32KHZ;
-
- ret = i2c_smbus_write_byte_data(client, DS1337_REG_STATUS, status);
-out:
+ ret = regmap_update_bits(ds1307->regmap, DS1337_REG_STATUS,
+ DS3231_BIT_EN32KHZ,
+ enable ? DS3231_BIT_EN32KHZ : 0);
mutex_unlock(lock);
return ret;
@@ -1263,11 +1204,11 @@ static void ds3231_clk_32khz_unprepare(struct clk_hw *hw)
static int ds3231_clk_32khz_is_prepared(struct clk_hw *hw)
{
struct ds1307 *ds1307 = clk_32khz_to_ds1307(hw);
- int status;
+ int status, ret;
- status = i2c_smbus_read_byte_data(ds1307->client, DS1337_REG_STATUS);
- if (status < 0)
- return status;
+ ret = regmap_read(ds1307->regmap, DS1337_REG_STATUS, &status);
+ if (ret)
+ return ret;
return !!(status & DS3231_BIT_EN32KHZ);
}
@@ -1292,18 +1233,17 @@ static struct clk_init_data ds3231_clks_init[] = {
static int ds3231_clks_register(struct ds1307 *ds1307)
{
- struct i2c_client *client = ds1307->client;
- struct device_node *node = client->dev.of_node;
+ struct device_node *node = ds1307->dev->of_node;
struct clk_onecell_data *onecell;
int i;
- onecell = devm_kzalloc(&client->dev, sizeof(*onecell), GFP_KERNEL);
+ onecell = devm_kzalloc(ds1307->dev, sizeof(*onecell), GFP_KERNEL);
if (!onecell)
return -ENOMEM;
onecell->clk_num = ARRAY_SIZE(ds3231_clks_init);
- onecell->clks = devm_kcalloc(&client->dev, onecell->clk_num,
- sizeof(onecell->clks[0]), GFP_KERNEL);
+ onecell->clks = devm_kcalloc(ds1307->dev, onecell->clk_num,
+ sizeof(onecell->clks[0]), GFP_KERNEL);
if (!onecell->clks)
return -ENOMEM;
@@ -1322,8 +1262,8 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
&init.name);
ds1307->clks[i].init = &init;
- onecell->clks[i] = devm_clk_register(&client->dev,
- &ds1307->clks[i]);
+ onecell->clks[i] = devm_clk_register(ds1307->dev,
+ &ds1307->clks[i]);
if (IS_ERR(onecell->clks[i]))
return PTR_ERR(onecell->clks[i]);
}
@@ -1345,8 +1285,8 @@ static void ds1307_clks_register(struct ds1307 *ds1307)
ret = ds3231_clks_register(ds1307);
if (ret) {
- dev_warn(&ds1307->client->dev,
- "unable to register clock device %d\n", ret);
+ dev_warn(ds1307->dev, "unable to register clock device %d\n",
+ ret);
}
}
@@ -1358,6 +1298,12 @@ static void ds1307_clks_register(struct ds1307 *ds1307)
#endif /* CONFIG_COMMON_CLK */
+static const struct regmap_config regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x12,
+};
+
static int ds1307_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -1365,7 +1311,6 @@ static int ds1307_probe(struct i2c_client *client,
int err = -ENODEV;
int tmp, wday;
struct chip_desc *chip;
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
bool want_irq = false;
bool ds1307_can_wakeup_device = false;
unsigned char *buf;
@@ -1382,17 +1327,22 @@ static int ds1307_probe(struct i2c_client *client,
};
const struct rtc_class_ops *rtc_ops = &ds13xx_rtc_ops;
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)
- && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
- return -EIO;
-
ds1307 = devm_kzalloc(&client->dev, sizeof(struct ds1307), GFP_KERNEL);
if (!ds1307)
return -ENOMEM;
- i2c_set_clientdata(client, ds1307);
+ dev_set_drvdata(&client->dev, ds1307);
+ ds1307->dev = &client->dev;
+ ds1307->name = client->name;
+ ds1307->irq = client->irq;
- ds1307->client = client;
+ ds1307->regmap = devm_regmap_init_i2c(client, &regmap_config);
+ if (IS_ERR(ds1307->regmap)) {
+ dev_err(ds1307->dev, "regmap allocation failed\n");
+ return PTR_ERR(ds1307->regmap);
+ }
+
+ i2c_set_clientdata(client, ds1307);
if (client->dev.of_node) {
ds1307->type = (enum ds_type)
@@ -1405,7 +1355,7 @@ static int ds1307_probe(struct i2c_client *client,
const struct acpi_device_id *acpi_id;
acpi_id = acpi_match_device(ACPI_PTR(ds1307_acpi_ids),
- &client->dev);
+ ds1307->dev);
if (!acpi_id)
return -ENODEV;
chip = &chips[acpi_id->driver_data];
@@ -1413,27 +1363,21 @@ static int ds1307_probe(struct i2c_client *client,
}
if (!pdata)
- ds1307_trickle_init(client, chip);
+ ds1307_trickle_init(ds1307, chip);
else if (pdata->trickle_charger_setup)
chip->trickle_charger_setup = pdata->trickle_charger_setup;
if (chip->trickle_charger_setup && chip->trickle_charger_reg) {
- dev_dbg(&client->dev, "writing trickle charger info 0x%x to 0x%x\n",
+ dev_dbg(ds1307->dev,
+ "writing trickle charger info 0x%x to 0x%x\n",
DS13XX_TRICKLE_CHARGER_MAGIC | chip->trickle_charger_setup,
chip->trickle_charger_reg);
- i2c_smbus_write_byte_data(client, chip->trickle_charger_reg,
+ regmap_write(ds1307->regmap, chip->trickle_charger_reg,
DS13XX_TRICKLE_CHARGER_MAGIC |
chip->trickle_charger_setup);
}
buf = ds1307->regs;
- if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
- ds1307->read_block_data = ds1307_native_smbus_read_block_data;
- ds1307->write_block_data = ds1307_native_smbus_write_block_data;
- } else {
- ds1307->read_block_data = ds1307_read_block_data;
- ds1307->write_block_data = ds1307_write_block_data;
- }
#ifdef CONFIG_OF
/*
@@ -1459,11 +1403,10 @@ static int ds1307_probe(struct i2c_client *client,
case ds_1339:
case ds_3231:
/* get registers that the "rtc" read below won't read... */
- tmp = ds1307->read_block_data(ds1307->client,
- DS1337_REG_CONTROL, 2, buf);
- if (tmp != 2) {
- dev_dbg(&client->dev, "read error %d\n", tmp);
- err = -EIO;
+ err = regmap_bulk_read(ds1307->regmap, DS1337_REG_CONTROL,
+ buf, 2);
+ if (err) {
+ dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
@@ -1477,8 +1420,8 @@ static int ds1307_probe(struct i2c_client *client,
* For some variants, be sure alarms can trigger when we're
* running on Vbackup (BBSQI/BBSQW)
*/
- if (chip->alarm && (ds1307->client->irq > 0 ||
- ds1307_can_wakeup_device)) {
+ if (chip->alarm && (ds1307->irq > 0 ||
+ ds1307_can_wakeup_device)) {
ds1307->regs[0] |= DS1337_BIT_INTCN
| bbsqi_bitpos[ds1307->type];
ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
@@ -1486,50 +1429,49 @@ static int ds1307_probe(struct i2c_client *client,
want_irq = true;
}
- i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL,
- ds1307->regs[0]);
+ regmap_write(ds1307->regmap, DS1337_REG_CONTROL,
+ ds1307->regs[0]);
/* oscillator fault? clear flag, and warn */
if (ds1307->regs[1] & DS1337_BIT_OSF) {
- i2c_smbus_write_byte_data(client, DS1337_REG_STATUS,
- ds1307->regs[1] & ~DS1337_BIT_OSF);
- dev_warn(&client->dev, "SET TIME!\n");
+ regmap_write(ds1307->regmap, DS1337_REG_STATUS,
+ ds1307->regs[1] & ~DS1337_BIT_OSF);
+ dev_warn(ds1307->dev, "SET TIME!\n");
}
break;
case rx_8025:
- tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
- RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
- if (tmp != 2) {
- dev_dbg(&client->dev, "read error %d\n", tmp);
- err = -EIO;
+ err = regmap_bulk_read(ds1307->regmap,
+ RX8025_REG_CTRL1 << 4 | 0x08, buf, 2);
+ if (err) {
+ dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
/* oscillator off? turn it on, so clock can tick. */
if (!(ds1307->regs[1] & RX8025_BIT_XST)) {
ds1307->regs[1] |= RX8025_BIT_XST;
- i2c_smbus_write_byte_data(client,
- RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
- dev_warn(&client->dev,
+ regmap_write(ds1307->regmap,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(ds1307->dev,
"oscillator stop detected - SET TIME!\n");
}
if (ds1307->regs[1] & RX8025_BIT_PON) {
ds1307->regs[1] &= ~RX8025_BIT_PON;
- i2c_smbus_write_byte_data(client,
- RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
- dev_warn(&client->dev, "power-on detected\n");
+ regmap_write(ds1307->regmap,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(ds1307->dev, "power-on detected\n");
}
if (ds1307->regs[1] & RX8025_BIT_VDET) {
ds1307->regs[1] &= ~RX8025_BIT_VDET;
- i2c_smbus_write_byte_data(client,
- RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
- dev_warn(&client->dev, "voltage drop detected\n");
+ regmap_write(ds1307->regmap,
+ RX8025_REG_CTRL2 << 4 | 0x08,
+ ds1307->regs[1]);
+ dev_warn(ds1307->dev, "voltage drop detected\n");
}
/* make sure we are running in 24hour mode */
@@ -1537,16 +1479,15 @@ static int ds1307_probe(struct i2c_client *client,
u8 hour;
/* switch to 24 hour mode */
- i2c_smbus_write_byte_data(client,
- RX8025_REG_CTRL1 << 4 | 0x08,
- ds1307->regs[0] |
- RX8025_BIT_2412);
-
- tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
- RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
- if (tmp != 2) {
- dev_dbg(&client->dev, "read error %d\n", tmp);
- err = -EIO;
+ regmap_write(ds1307->regmap,
+ RX8025_REG_CTRL1 << 4 | 0x08,
+ ds1307->regs[0] | RX8025_BIT_2412);
+
+ err = regmap_bulk_read(ds1307->regmap,
+ RX8025_REG_CTRL1 << 4 | 0x08,
+ buf, 2);
+ if (err) {
+ dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
@@ -1557,9 +1498,16 @@ static int ds1307_probe(struct i2c_client *client,
if (ds1307->regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
hour += 12;
- i2c_smbus_write_byte_data(client,
- DS1307_REG_HOUR << 4 | 0x08,
- hour);
+ regmap_write(ds1307->regmap,
+ DS1307_REG_HOUR << 4 | 0x08, hour);
+ }
+ break;
+ case rx_8130:
+ ds1307->offset = 0x10; /* Seconds starts at 0x10 */
+ rtc_ops = &rx8130_rtc_ops;
+ if (chip->alarm && ds1307->irq > 0) {
+ irq_handler = rx8130_irq;
+ want_irq = true;
}
break;
case ds_1388:
@@ -1567,7 +1515,8 @@ static int ds1307_probe(struct i2c_client *client,
break;
case mcp794xx:
rtc_ops = &mcp794xx_rtc_ops;
- if (ds1307->client->irq > 0 && chip->alarm) {
+ if (chip->alarm && (ds1307->irq > 0 ||
+ ds1307_can_wakeup_device)) {
irq_handler = mcp794xx_irq;
want_irq = true;
}
@@ -1578,10 +1527,9 @@ static int ds1307_probe(struct i2c_client *client,
read_rtc:
/* read RTC registers */
- tmp = ds1307->read_block_data(ds1307->client, ds1307->offset, 8, buf);
- if (tmp != 8) {
- dev_dbg(&client->dev, "read error %d\n", tmp);
- err = -EIO;
+ err = regmap_bulk_read(ds1307->regmap, ds1307->offset, buf, 8);
+ if (err) {
+ dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
@@ -1597,56 +1545,56 @@ read_rtc:
case m41t00:
/* clock halted? turn it on, so clock can tick. */
if (tmp & DS1307_BIT_CH) {
- i2c_smbus_write_byte_data(client, DS1307_REG_SECS, 0);
- dev_warn(&client->dev, "SET TIME!\n");
+ regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
+ dev_warn(ds1307->dev, "SET TIME!\n");
goto read_rtc;
}
break;
+ case ds_1308:
case ds_1338:
/* clock halted? turn it on, so clock can tick. */
if (tmp & DS1307_BIT_CH)
- i2c_smbus_write_byte_data(client, DS1307_REG_SECS, 0);
+ regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
/* oscillator fault? clear flag, and warn */
if (ds1307->regs[DS1307_REG_CONTROL] & DS1338_BIT_OSF) {
- i2c_smbus_write_byte_data(client, DS1307_REG_CONTROL,
- ds1307->regs[DS1307_REG_CONTROL]
- & ~DS1338_BIT_OSF);
- dev_warn(&client->dev, "SET TIME!\n");
+ regmap_write(ds1307->regmap, DS1307_REG_CONTROL,
+ ds1307->regs[DS1307_REG_CONTROL] &
+ ~DS1338_BIT_OSF);
+ dev_warn(ds1307->dev, "SET TIME!\n");
goto read_rtc;
}
break;
case ds_1340:
/* clock halted? turn it on, so clock can tick. */
if (tmp & DS1340_BIT_nEOSC)
- i2c_smbus_write_byte_data(client, DS1307_REG_SECS, 0);
+ regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
- tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG);
- if (tmp < 0) {
- dev_dbg(&client->dev, "read error %d\n", tmp);
- err = -EIO;
+ err = regmap_read(ds1307->regmap, DS1340_REG_FLAG, &tmp);
+ if (err) {
+ dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
/* oscillator fault? clear flag, and warn */
if (tmp & DS1340_BIT_OSF) {
- i2c_smbus_write_byte_data(client, DS1340_REG_FLAG, 0);
- dev_warn(&client->dev, "SET TIME!\n");
+ regmap_write(ds1307->regmap, DS1340_REG_FLAG, 0);
+ dev_warn(ds1307->dev, "SET TIME!\n");
}
break;
case mcp794xx:
/* make sure that the backup battery is enabled */
if (!(ds1307->regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
- i2c_smbus_write_byte_data(client, DS1307_REG_WDAY,
- ds1307->regs[DS1307_REG_WDAY]
- | MCP794XX_BIT_VBATEN);
+ regmap_write(ds1307->regmap, DS1307_REG_WDAY,
+ ds1307->regs[DS1307_REG_WDAY] |
+ MCP794XX_BIT_VBATEN);
}
/* clock halted? turn it on, so clock can tick. */
if (!(tmp & MCP794XX_BIT_ST)) {
- i2c_smbus_write_byte_data(client, DS1307_REG_SECS,
- MCP794XX_BIT_ST);
- dev_warn(&client->dev, "SET TIME!\n");
+ regmap_write(ds1307->regmap, DS1307_REG_SECS,
+ MCP794XX_BIT_ST);
+ dev_warn(ds1307->dev, "SET TIME!\n");
goto read_rtc;
}
@@ -1680,16 +1628,15 @@ read_rtc:
tmp = 0;
if (ds1307->regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
tmp += 12;
- i2c_smbus_write_byte_data(client,
- ds1307->offset + DS1307_REG_HOUR,
- bin2bcd(tmp));
+ regmap_write(ds1307->regmap, ds1307->offset + DS1307_REG_HOUR,
+ bin2bcd(tmp));
}
/*
* Some IPs have weekday reset value = 0x1 which might not correct
* hence compute the wday using the current date/month/year values
*/
- ds1307_get_time(&client->dev, &tm);
+ ds1307_get_time(ds1307->dev, &tm);
wday = tm.tm_wday;
timestamp = rtc_tm_to_time64(&tm);
rtc_time64_to_tm(timestamp, &tm);
@@ -1699,78 +1646,63 @@ read_rtc:
* If different then set the wday which we computed using
* timestamp
*/
- if (wday != tm.tm_wday) {
- wday = i2c_smbus_read_byte_data(client, MCP794XX_REG_WEEKDAY);
- wday = wday & ~MCP794XX_REG_WEEKDAY_WDAY_MASK;
- wday = wday | (tm.tm_wday + 1);
- i2c_smbus_write_byte_data(client, MCP794XX_REG_WEEKDAY, wday);
- }
+ if (wday != tm.tm_wday)
+ regmap_update_bits(ds1307->regmap, MCP794XX_REG_WEEKDAY,
+ MCP794XX_REG_WEEKDAY_WDAY_MASK,
+ tm.tm_wday + 1);
if (want_irq) {
- device_set_wakeup_capable(&client->dev, true);
+ device_set_wakeup_capable(ds1307->dev, true);
set_bit(HAS_ALARM, &ds1307->flags);
}
- ds1307->rtc = devm_rtc_device_register(&client->dev, client->name,
- rtc_ops, THIS_MODULE);
+
+ ds1307->rtc = devm_rtc_allocate_device(ds1307->dev);
if (IS_ERR(ds1307->rtc)) {
return PTR_ERR(ds1307->rtc);
}
- if (ds1307_can_wakeup_device && ds1307->client->irq <= 0) {
+ if (ds1307_can_wakeup_device && ds1307->irq <= 0) {
/* Disable request for an IRQ */
want_irq = false;
- dev_info(&client->dev, "'wakeup-source' is set, request for an IRQ is disabled!\n");
+ dev_info(ds1307->dev,
+ "'wakeup-source' is set, request for an IRQ is disabled!\n");
/* We cannot support UIE mode if we do not have an IRQ line */
ds1307->rtc->uie_unsupported = 1;
}
if (want_irq) {
- err = devm_request_threaded_irq(&client->dev,
- client->irq, NULL, irq_handler,
+ err = devm_request_threaded_irq(ds1307->dev,
+ ds1307->irq, NULL, irq_handler,
IRQF_SHARED | IRQF_ONESHOT,
- ds1307->rtc->name, client);
+ ds1307->name, ds1307);
if (err) {
client->irq = 0;
- device_set_wakeup_capable(&client->dev, false);
+ device_set_wakeup_capable(ds1307->dev, false);
clear_bit(HAS_ALARM, &ds1307->flags);
- dev_err(&client->dev, "unable to request IRQ!\n");
+ dev_err(ds1307->dev, "unable to request IRQ!\n");
} else
- dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
+ dev_dbg(ds1307->dev, "got IRQ %d\n", client->irq);
}
if (chip->nvram_size) {
-
- ds1307->nvram = devm_kzalloc(&client->dev,
- sizeof(struct bin_attribute),
- GFP_KERNEL);
- if (!ds1307->nvram) {
- dev_err(&client->dev, "cannot allocate memory for nvram sysfs\n");
- } else {
-
- ds1307->nvram->attr.name = "nvram";
- ds1307->nvram->attr.mode = S_IRUGO | S_IWUSR;
-
- sysfs_bin_attr_init(ds1307->nvram);
-
- ds1307->nvram->read = ds1307_nvram_read;
- ds1307->nvram->write = ds1307_nvram_write;
- ds1307->nvram->size = chip->nvram_size;
- ds1307->nvram_offset = chip->nvram_offset;
-
- err = sysfs_create_bin_file(&client->dev.kobj,
- ds1307->nvram);
- if (err) {
- dev_err(&client->dev,
- "unable to create sysfs file: %s\n",
- ds1307->nvram->attr.name);
- } else {
- set_bit(HAS_NVRAM, &ds1307->flags);
- dev_info(&client->dev, "%zu bytes nvram\n",
- ds1307->nvram->size);
- }
- }
+ ds1307->nvmem_cfg.name = "ds1307_nvram";
+ ds1307->nvmem_cfg.word_size = 1;
+ ds1307->nvmem_cfg.stride = 1;
+ ds1307->nvmem_cfg.size = chip->nvram_size;
+ ds1307->nvmem_cfg.reg_read = ds1307_nvram_read;
+ ds1307->nvmem_cfg.reg_write = ds1307_nvram_write;
+ ds1307->nvmem_cfg.priv = ds1307;
+ ds1307->nvram_offset = chip->nvram_offset;
+
+ ds1307->rtc->nvmem_config = &ds1307->nvmem_cfg;
+ ds1307->rtc->nvram_old_abi = true;
}
+ ds1307->rtc->ops = rtc_ops;
+ err = rtc_register_device(ds1307->rtc);
+ if (err)
+ return err;
+
ds1307_hwmon_register(ds1307);
ds1307_clks_register(ds1307);
@@ -1780,16 +1712,6 @@ exit:
return err;
}
-static int ds1307_remove(struct i2c_client *client)
-{
- struct ds1307 *ds1307 = i2c_get_clientdata(client);
-
- if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags))
- sysfs_remove_bin_file(&client->dev.kobj, ds1307->nvram);
-
- return 0;
-}
-
static struct i2c_driver ds1307_driver = {
.driver = {
.name = "rtc-ds1307",
@@ -1797,7 +1719,6 @@ static struct i2c_driver ds1307_driver = {
.acpi_match_table = ACPI_PTR(ds1307_acpi_ids),
},
.probe = ds1307_probe,
- .remove = ds1307_remove,
.id_table = ds1307_id,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 13:05:56 +0000