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Commit 11e5890b authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Alexandre Belloni
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rtc: ds1307: convert driver to regmap 

This patch converts the ds1307 driver to using regmap. It's a rather
big patch and I can test with DS3231 only. With this chip it's
working fine.

I'd appreciate if people with other supported hardware could test as
well.
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent 2ea659a9
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Showing with 221 additions and 382 deletions
drivers/rtc/rtc-ds1307.c
View file @ 11e5890b
......@@ -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
......@@ -120,12 +121,11 @@ struct ds1307 {
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
......@@ -137,11 +137,11 @@ struct chip_desc {
u16 nvram_size;
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] = {
......@@ -280,136 +280,6 @@ 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
......@@ -417,26 +287,25 @@ 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, control, 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_read(ds1307->regmap, DS1337_REG_CONTROL, &control);
if (ret)
goto out;
control &= ~DS1337_BIT_A1IE;
i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
regmap_write(ds1307->regmap, DS1337_REG_CONTROL, control);
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
}
......@@ -452,14 +321,13 @@ static irqreturn_t ds1307_irq(int irq, void *dev_id)
static int ds1307_get_time(struct device *dev, struct rtc_time *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
int tmp;
int tmp, ret;
/* 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);
......@@ -580,9 +448,8 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
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 +458,18 @@ 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 +499,7 @@ 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 +514,10 @@ 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 +540,8 @@ 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 +550,7 @@ 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;
......@@ -695,27 +558,22 @@ 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);
int control, ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -ENOTTY;
ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
if (ret < 0)
ret = regmap_read(ds1307->regmap, DS1337_REG_CONTROL, &control);
if (ret)
return ret;
if (enabled)
ret |= DS1337_BIT_A1IE;
control |= DS1337_BIT_A1IE;
else
ret &= ~DS1337_BIT_A1IE;
ret = i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, ret);
if (ret < 0)
return ret;
control &= ~DS1337_BIT_A1IE;
return 0;
return regmap_write(ds1307->regmap, DS1337_REG_CONTROL, control);
}
static const struct rtc_class_ops ds13xx_rtc_ops = {
......@@ -752,31 +610,30 @@ 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)
ret = regmap_read(ds1307->regmap, MCP794XX_REG_CONTROL, &reg);
if (ret)
goto out;
reg &= ~MCP794XX_BIT_ALM0_EN;
ret = i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, reg);
if (ret < 0)
ret = regmap_write(ds1307->regmap, MCP794XX_REG_CONTROL, reg);
if (ret)
goto out;
rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
......@@ -789,8 +646,7 @@ static irqreturn_t mcp794xx_irq(int irq, void *dev_id)
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 +654,8 @@ 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 +684,7 @@ 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 +698,8 @@ 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 +717,34 @@ 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);
int reg, ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_CONTROL);
if (reg < 0)
return reg;
ret = regmap_read(ds1307->regmap, MCP794XX_REG_CONTROL, &reg);
if (ret)
return ret;
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_write(ds1307->regmap, MCP794XX_REG_CONTROL, reg);
}
static const struct rtc_class_ops mcp794xx_rtc_ops = {
......@@ -908,17 +762,15 @@ ds1307_nvram_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct i2c_client *client;
struct ds1307 *ds1307;
int result;
client = kobj_to_i2c_client(kobj);
ds1307 = i2c_get_clientdata(client);
ds1307 = dev_get_drvdata(kobj_to_dev(kobj));
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);
result = regmap_bulk_read(ds1307->regmap, ds1307->nvram_offset + off,
buf, count);
if (result)
dev_err(ds1307->dev, "%s error %d\n", "nvram read", result);
return result;
}
......@@ -927,17 +779,15 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct i2c_client *client;
struct ds1307 *ds1307;
int result;
client = kobj_to_i2c_client(kobj);
ds1307 = i2c_get_clientdata(client);
ds1307 = dev_get_drvdata(kobj_to_dev(kobj));
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);
result = regmap_bulk_write(ds1307->regmap, ds1307->nvram_offset + off,
buf, count);
if (result) {
dev_err(ds1307->dev, "%s error %d\n", "nvram write", result);
return result;
}
return count;
......@@ -946,7 +796,7 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj,
/*----------------------------------------------------------------------*/
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 +813,14 @@ 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 +828,12 @@ 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 +860,10 @@ 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 +903,11 @@ 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));
}
}
......@@ -1099,23 +946,20 @@ 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;
ret = regmap_read(ds1307->regmap, DS1337_REG_CONTROL, &control);
if (ret)
goto out;
}
control &= ~mask;
control |= value;
ret = i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
ret = regmap_write(ds1307->regmap, DS1337_REG_CONTROL, control);
out:
mutex_unlock(lock);
......@@ -1126,12 +970,12 @@ 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 +1039,11 @@ 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);
}
......@@ -1221,25 +1065,22 @@ 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;
ret = regmap_read(ds1307->regmap, DS1337_REG_STATUS, &status);
if (ret)
goto out;
}
if (enable)
status |= DS3231_BIT_EN32KHZ;
else
status &= ~DS3231_BIT_EN32KHZ;
ret = i2c_smbus_write_byte_data(client, DS1337_REG_STATUS, status);
ret = regmap_write(ds1307->regmap, DS1337_REG_STATUS, status);
out:
mutex_unlock(lock);
......@@ -1263,11 +1104,11 @@ 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 +1133,17 @@ 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 +1162,8 @@ 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 +1185,8 @@ 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 +1198,12 @@ 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 +1211,6 @@ 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 +1227,22 @@ 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->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);
}
ds1307->client = client;
i2c_set_clientdata(client, ds1307);
if (client->dev.of_node) {
ds1307->type = (enum ds_type)
......@@ -1405,7 +1255,7 @@ 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 +1263,21 @@ 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 +1303,10 @@ 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 +1320,8 @@ 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 +1329,49 @@ 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 +1379,15 @@ 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 +1398,8 @@ 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 ds_1388:
......@@ -1567,7 +1407,7 @@ static int ds1307_probe(struct i2c_client *client,
break;
case mcp794xx:
rtc_ops = &mcp794xx_rtc_ops;
if (ds1307->client->irq > 0 && chip->alarm) {
if (ds1307->irq > 0 && chip->alarm) {
irq_handler = mcp794xx_irq;
want_irq = true;
}
......@@ -1578,10 +1418,9 @@ 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 +1436,55 @@ static int ds1307_probe(struct i2c_client *client,
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_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 +1518,15 @@ static int ds1307_probe(struct i2c_client *client,
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);
......@@ -1700,51 +1537,53 @@ static int ds1307_probe(struct i2c_client *client,
* timestamp
*/
if (wday != tm.tm_wday) {
wday = i2c_smbus_read_byte_data(client, MCP794XX_REG_WEEKDAY);
regmap_read(ds1307->regmap, MCP794XX_REG_WEEKDAY, &wday);
wday = wday & ~MCP794XX_REG_WEEKDAY_WDAY_MASK;
wday = wday | (tm.tm_wday + 1);
i2c_smbus_write_byte_data(client, MCP794XX_REG_WEEKDAY, wday);
regmap_write(ds1307->regmap, MCP794XX_REG_WEEKDAY, wday);
}
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,
ds1307->rtc = devm_rtc_device_register(ds1307->dev, ds1307->name,
rtc_ops, THIS_MODULE);
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->rtc->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,
ds1307->nvram = devm_kzalloc(ds1307->dev,
sizeof(struct bin_attribute),
GFP_KERNEL);
if (!ds1307->nvram) {
dev_err(&client->dev, "cannot allocate memory for nvram sysfs\n");
dev_err(ds1307->dev,
"cannot allocate memory for nvram sysfs\n");
} else {
ds1307->nvram->attr.name = "nvram";
......@@ -1757,15 +1596,15 @@ static int ds1307_probe(struct i2c_client *client,
ds1307->nvram->size = chip->nvram_size;
ds1307->nvram_offset = chip->nvram_offset;
err = sysfs_create_bin_file(&client->dev.kobj,
err = sysfs_create_bin_file(&ds1307->dev->kobj,
ds1307->nvram);
if (err) {
dev_err(&client->dev,
dev_err(ds1307->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",
dev_info(ds1307->dev, "%zu bytes nvram\n",
ds1307->nvram->size);
}
}
......@@ -1785,7 +1624,7 @@ 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);
sysfs_remove_bin_file(&ds1307->dev->kobj, ds1307->nvram);
return 0;
}
......
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