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path: root/drivers/rtc/rtc-rx8010.c
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Diffstat (limited to 'drivers/rtc/rtc-rx8010.c')
-rw-r--r--drivers/rtc/rtc-rx8010.c332
1 files changed, 143 insertions, 189 deletions
diff --git a/drivers/rtc/rtc-rx8010.c b/drivers/rtc/rtc-rx8010.c
index fe010151ec8f..dca41a2a39b2 100644
--- a/drivers/rtc/rtc-rx8010.c
+++ b/drivers/rtc/rtc-rx8010.c
@@ -11,42 +11,43 @@
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/regmap.h>
#include <linux/rtc.h>
-#define RX8010_SEC 0x10
-#define RX8010_MIN 0x11
-#define RX8010_HOUR 0x12
-#define RX8010_WDAY 0x13
-#define RX8010_MDAY 0x14
-#define RX8010_MONTH 0x15
-#define RX8010_YEAR 0x16
-#define RX8010_RESV17 0x17
-#define RX8010_ALMIN 0x18
-#define RX8010_ALHOUR 0x19
-#define RX8010_ALWDAY 0x1A
-#define RX8010_TCOUNT0 0x1B
-#define RX8010_TCOUNT1 0x1C
-#define RX8010_EXT 0x1D
-#define RX8010_FLAG 0x1E
-#define RX8010_CTRL 0x1F
+#define RX8010_SEC 0x10
+#define RX8010_MIN 0x11
+#define RX8010_HOUR 0x12
+#define RX8010_WDAY 0x13
+#define RX8010_MDAY 0x14
+#define RX8010_MONTH 0x15
+#define RX8010_YEAR 0x16
+#define RX8010_RESV17 0x17
+#define RX8010_ALMIN 0x18
+#define RX8010_ALHOUR 0x19
+#define RX8010_ALWDAY 0x1A
+#define RX8010_TCOUNT0 0x1B
+#define RX8010_TCOUNT1 0x1C
+#define RX8010_EXT 0x1D
+#define RX8010_FLAG 0x1E
+#define RX8010_CTRL 0x1F
/* 0x20 to 0x2F are user registers */
-#define RX8010_RESV30 0x30
-#define RX8010_RESV31 0x31
-#define RX8010_IRQ 0x32
+#define RX8010_RESV30 0x30
+#define RX8010_RESV31 0x31
+#define RX8010_IRQ 0x32
-#define RX8010_EXT_WADA BIT(3)
+#define RX8010_EXT_WADA BIT(3)
-#define RX8010_FLAG_VLF BIT(1)
-#define RX8010_FLAG_AF BIT(3)
-#define RX8010_FLAG_TF BIT(4)
-#define RX8010_FLAG_UF BIT(5)
+#define RX8010_FLAG_VLF BIT(1)
+#define RX8010_FLAG_AF BIT(3)
+#define RX8010_FLAG_TF BIT(4)
+#define RX8010_FLAG_UF BIT(5)
-#define RX8010_CTRL_AIE BIT(3)
-#define RX8010_CTRL_UIE BIT(5)
-#define RX8010_CTRL_STOP BIT(6)
-#define RX8010_CTRL_TEST BIT(7)
+#define RX8010_CTRL_AIE BIT(3)
+#define RX8010_CTRL_UIE BIT(5)
+#define RX8010_CTRL_STOP BIT(6)
+#define RX8010_CTRL_TEST BIT(7)
-#define RX8010_ALARM_AE BIT(7)
+#define RX8010_ALARM_AE BIT(7)
static const struct i2c_device_id rx8010_id[] = {
{ "rx8010", 0 },
@@ -61,7 +62,7 @@ static const struct of_device_id rx8010_of_match[] = {
MODULE_DEVICE_TABLE(of, rx8010_of_match);
struct rx8010_data {
- struct i2c_client *client;
+ struct regmap *regs;
struct rtc_device *rtc;
u8 ctrlreg;
};
@@ -70,13 +71,12 @@ static irqreturn_t rx8010_irq_1_handler(int irq, void *dev_id)
{
struct i2c_client *client = dev_id;
struct rx8010_data *rx8010 = i2c_get_clientdata(client);
- int flagreg;
+ int flagreg, err;
mutex_lock(&rx8010->rtc->ops_lock);
- flagreg = i2c_smbus_read_byte_data(client, RX8010_FLAG);
-
- if (flagreg <= 0) {
+ err = regmap_read(rx8010->regs, RX8010_FLAG, &flagreg);
+ if (err) {
mutex_unlock(&rx8010->rtc->ops_lock);
return IRQ_NONE;
}
@@ -99,32 +99,29 @@ static irqreturn_t rx8010_irq_1_handler(int irq, void *dev_id)
rtc_update_irq(rx8010->rtc, 1, RTC_UF | RTC_IRQF);
}
- i2c_smbus_write_byte_data(client, RX8010_FLAG, flagreg);
-
+ err = regmap_write(rx8010->regs, RX8010_FLAG, flagreg);
mutex_unlock(&rx8010->rtc->ops_lock);
- return IRQ_HANDLED;
+ return err ? IRQ_NONE : IRQ_HANDLED;
}
static int rx8010_get_time(struct device *dev, struct rtc_time *dt)
{
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- u8 date[7];
- int flagreg;
- int err;
+ u8 date[RX8010_YEAR - RX8010_SEC + 1];
+ int flagreg, err;
- flagreg = i2c_smbus_read_byte_data(rx8010->client, RX8010_FLAG);
- if (flagreg < 0)
- return flagreg;
+ err = regmap_read(rx8010->regs, RX8010_FLAG, &flagreg);
+ if (err)
+ return err;
if (flagreg & RX8010_FLAG_VLF) {
dev_warn(dev, "Frequency stop detected\n");
return -EINVAL;
}
- err = i2c_smbus_read_i2c_block_data(rx8010->client, RX8010_SEC,
- 7, date);
- if (err != 7)
- return err < 0 ? err : -EIO;
+ err = regmap_bulk_read(rx8010->regs, RX8010_SEC, date, sizeof(date));
+ if (err)
+ return err;
dt->tm_sec = bcd2bin(date[RX8010_SEC - RX8010_SEC] & 0x7f);
dt->tm_min = bcd2bin(date[RX8010_MIN - RX8010_SEC] & 0x7f);
@@ -140,22 +137,13 @@ static int rx8010_get_time(struct device *dev, struct rtc_time *dt)
static int rx8010_set_time(struct device *dev, struct rtc_time *dt)
{
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- u8 date[7];
- int ctrl, flagreg;
- int ret;
-
- if ((dt->tm_year < 100) || (dt->tm_year > 199))
- return -EINVAL;
+ u8 date[RX8010_YEAR - RX8010_SEC + 1];
+ int err;
/* set STOP bit before changing clock/calendar */
- ctrl = i2c_smbus_read_byte_data(rx8010->client, RX8010_CTRL);
- if (ctrl < 0)
- return ctrl;
- rx8010->ctrlreg = ctrl | RX8010_CTRL_STOP;
- ret = i2c_smbus_write_byte_data(rx8010->client, RX8010_CTRL,
- rx8010->ctrlreg);
- if (ret < 0)
- return ret;
+ err = regmap_set_bits(rx8010->regs, RX8010_CTRL, RX8010_CTRL_STOP);
+ if (err)
+ return err;
date[RX8010_SEC - RX8010_SEC] = bin2bcd(dt->tm_sec);
date[RX8010_MIN - RX8010_SEC] = bin2bcd(dt->tm_min);
@@ -165,66 +153,54 @@ static int rx8010_set_time(struct device *dev, struct rtc_time *dt)
date[RX8010_YEAR - RX8010_SEC] = bin2bcd(dt->tm_year - 100);
date[RX8010_WDAY - RX8010_SEC] = bin2bcd(1 << dt->tm_wday);
- ret = i2c_smbus_write_i2c_block_data(rx8010->client,
- RX8010_SEC, 7, date);
- if (ret < 0)
- return ret;
+ err = regmap_bulk_write(rx8010->regs, RX8010_SEC, date, sizeof(date));
+ if (err)
+ return err;
/* clear STOP bit after changing clock/calendar */
- ctrl = i2c_smbus_read_byte_data(rx8010->client, RX8010_CTRL);
- if (ctrl < 0)
- return ctrl;
- rx8010->ctrlreg = ctrl & ~RX8010_CTRL_STOP;
- ret = i2c_smbus_write_byte_data(rx8010->client, RX8010_CTRL,
- rx8010->ctrlreg);
- if (ret < 0)
- return ret;
-
- flagreg = i2c_smbus_read_byte_data(rx8010->client, RX8010_FLAG);
- if (flagreg < 0) {
- return flagreg;
- }
+ err = regmap_clear_bits(rx8010->regs, RX8010_CTRL, RX8010_CTRL_STOP);
+ if (err)
+ return err;
- if (flagreg & RX8010_FLAG_VLF)
- ret = i2c_smbus_write_byte_data(rx8010->client, RX8010_FLAG,
- flagreg & ~RX8010_FLAG_VLF);
+ err = regmap_clear_bits(rx8010->regs, RX8010_FLAG, RX8010_FLAG_VLF);
+ if (err)
+ return err;
return 0;
}
-static int rx8010_init_client(struct i2c_client *client)
+static int rx8010_init(struct device *dev)
{
- struct rx8010_data *rx8010 = i2c_get_clientdata(client);
+ struct rx8010_data *rx8010 = dev_get_drvdata(dev);
u8 ctrl[2];
- int need_clear = 0, err = 0;
+ int need_clear = 0, err;
/* Initialize reserved registers as specified in datasheet */
- err = i2c_smbus_write_byte_data(client, RX8010_RESV17, 0xD8);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_RESV17, 0xD8);
+ if (err)
return err;
- err = i2c_smbus_write_byte_data(client, RX8010_RESV30, 0x00);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_RESV30, 0x00);
+ if (err)
return err;
- err = i2c_smbus_write_byte_data(client, RX8010_RESV31, 0x08);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_RESV31, 0x08);
+ if (err)
return err;
- err = i2c_smbus_write_byte_data(client, RX8010_IRQ, 0x00);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_IRQ, 0x00);
+ if (err)
return err;
- err = i2c_smbus_read_i2c_block_data(rx8010->client, RX8010_FLAG,
- 2, ctrl);
- if (err != 2)
- return err < 0 ? err : -EIO;
+ err = regmap_bulk_read(rx8010->regs, RX8010_FLAG, ctrl, 2);
+ if (err)
+ return err;
if (ctrl[0] & RX8010_FLAG_VLF)
- dev_warn(&client->dev, "Frequency stop was detected\n");
+ dev_warn(dev, "Frequency stop was detected\n");
if (ctrl[0] & RX8010_FLAG_AF) {
- dev_warn(&client->dev, "Alarm was detected\n");
+ dev_warn(dev, "Alarm was detected\n");
need_clear = 1;
}
@@ -236,8 +212,8 @@ static int rx8010_init_client(struct i2c_client *client)
if (need_clear) {
ctrl[0] &= ~(RX8010_FLAG_AF | RX8010_FLAG_TF | RX8010_FLAG_UF);
- err = i2c_smbus_write_byte_data(client, RX8010_FLAG, ctrl[0]);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_FLAG, ctrl[0]);
+ if (err)
return err;
}
@@ -249,18 +225,16 @@ static int rx8010_init_client(struct i2c_client *client)
static int rx8010_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- struct i2c_client *client = rx8010->client;
u8 alarmvals[3];
- int flagreg;
- int err;
+ int flagreg, err;
- err = i2c_smbus_read_i2c_block_data(client, RX8010_ALMIN, 3, alarmvals);
- if (err != 3)
- return err < 0 ? err : -EIO;
+ err = regmap_bulk_read(rx8010->regs, RX8010_ALMIN, alarmvals, 3);
+ if (err)
+ return err;
- flagreg = i2c_smbus_read_byte_data(client, RX8010_FLAG);
- if (flagreg < 0)
- return flagreg;
+ err = regmap_read(rx8010->regs, RX8010_FLAG, &flagreg);
+ if (err)
+ return err;
t->time.tm_sec = 0;
t->time.tm_min = bcd2bin(alarmvals[0] & 0x7f);
@@ -277,55 +251,38 @@ static int rx8010_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int rx8010_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
- struct i2c_client *client = to_i2c_client(dev);
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
u8 alarmvals[3];
- int extreg, flagreg;
int err;
- flagreg = i2c_smbus_read_byte_data(client, RX8010_FLAG);
- if (flagreg < 0) {
- return flagreg;
- }
-
if (rx8010->ctrlreg & (RX8010_CTRL_AIE | RX8010_CTRL_UIE)) {
rx8010->ctrlreg &= ~(RX8010_CTRL_AIE | RX8010_CTRL_UIE);
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_CTRL,
- rx8010->ctrlreg);
- if (err < 0) {
+ err = regmap_write(rx8010->regs, RX8010_CTRL, rx8010->ctrlreg);
+ if (err)
return err;
- }
}
- flagreg &= ~RX8010_FLAG_AF;
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_FLAG, flagreg);
- if (err < 0)
+ err = regmap_clear_bits(rx8010->regs, RX8010_FLAG, RX8010_FLAG_AF);
+ if (err)
return err;
alarmvals[0] = bin2bcd(t->time.tm_min);
alarmvals[1] = bin2bcd(t->time.tm_hour);
alarmvals[2] = bin2bcd(t->time.tm_mday);
- err = i2c_smbus_write_i2c_block_data(rx8010->client, RX8010_ALMIN,
- 2, alarmvals);
- if (err < 0)
+ err = regmap_bulk_write(rx8010->regs, RX8010_ALMIN, alarmvals, 2);
+ if (err)
return err;
- extreg = i2c_smbus_read_byte_data(client, RX8010_EXT);
- if (extreg < 0)
- return extreg;
-
- extreg |= RX8010_EXT_WADA;
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_EXT, extreg);
- if (err < 0)
+ err = regmap_clear_bits(rx8010->regs, RX8010_EXT, RX8010_EXT_WADA);
+ if (err)
return err;
if (alarmvals[2] == 0)
alarmvals[2] |= RX8010_ALARM_AE;
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_ALWDAY,
- alarmvals[2]);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_ALWDAY, alarmvals[2]);
+ if (err)
return err;
if (t->enabled) {
@@ -335,9 +292,8 @@ static int rx8010_set_alarm(struct device *dev, struct rtc_wkalrm *t)
rx8010->ctrlreg |=
(RX8010_CTRL_AIE | RX8010_CTRL_UIE);
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_CTRL,
- rx8010->ctrlreg);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_CTRL, rx8010->ctrlreg);
+ if (err)
return err;
}
@@ -347,11 +303,9 @@ static int rx8010_set_alarm(struct device *dev, struct rtc_wkalrm *t)
static int rx8010_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
- struct i2c_client *client = to_i2c_client(dev);
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- int flagreg;
- u8 ctrl;
int err;
+ u8 ctrl;
ctrl = rx8010->ctrlreg;
@@ -367,20 +321,14 @@ static int rx8010_alarm_irq_enable(struct device *dev,
ctrl &= ~RX8010_CTRL_AIE;
}
- flagreg = i2c_smbus_read_byte_data(client, RX8010_FLAG);
- if (flagreg < 0)
- return flagreg;
-
- flagreg &= ~RX8010_FLAG_AF;
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_FLAG, flagreg);
- if (err < 0)
+ err = regmap_clear_bits(rx8010->regs, RX8010_FLAG, RX8010_FLAG_AF);
+ if (err)
return err;
if (ctrl != rx8010->ctrlreg) {
rx8010->ctrlreg = ctrl;
- err = i2c_smbus_write_byte_data(rx8010->client, RX8010_CTRL,
- rx8010->ctrlreg);
- if (err < 0)
+ err = regmap_write(rx8010->regs, RX8010_CTRL, rx8010->ctrlreg);
+ if (err)
return err;
}
@@ -390,14 +338,13 @@ static int rx8010_alarm_irq_enable(struct device *dev,
static int rx8010_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- int tmp;
- int flagreg;
+ int tmp, flagreg, err;
switch (cmd) {
case RTC_VL_READ:
- flagreg = i2c_smbus_read_byte_data(rx8010->client, RX8010_FLAG);
- if (flagreg < 0)
- return flagreg;
+ err = regmap_read(rx8010->regs, RX8010_FLAG, &flagreg);
+ if (err)
+ return err;
tmp = flagreg & RX8010_FLAG_VLF ? RTC_VL_DATA_INVALID : 0;
return put_user(tmp, (unsigned int __user *)arg);
@@ -407,65 +354,72 @@ static int rx8010_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
}
}
-static struct rtc_class_ops rx8010_rtc_ops = {
+static const struct rtc_class_ops rx8010_rtc_ops_default = {
+ .read_time = rx8010_get_time,
+ .set_time = rx8010_set_time,
+ .ioctl = rx8010_ioctl,
+};
+
+static const struct rtc_class_ops rx8010_rtc_ops_alarm = {
.read_time = rx8010_get_time,
.set_time = rx8010_set_time,
.ioctl = rx8010_ioctl,
+ .read_alarm = rx8010_read_alarm,
+ .set_alarm = rx8010_set_alarm,
+ .alarm_irq_enable = rx8010_alarm_irq_enable,
+};
+
+static const struct regmap_config rx8010_regmap_config = {
+ .name = "rx8010-rtc",
+ .reg_bits = 8,
+ .val_bits = 8,
};
-static int rx8010_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int rx8010_probe(struct i2c_client *client)
{
- struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
struct rx8010_data *rx8010;
int err = 0;
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
- | I2C_FUNC_SMBUS_I2C_BLOCK)) {
- dev_err(&adapter->dev, "doesn't support required functionality\n");
- return -EIO;
- }
-
- rx8010 = devm_kzalloc(&client->dev, sizeof(struct rx8010_data),
- GFP_KERNEL);
+ rx8010 = devm_kzalloc(dev, sizeof(*rx8010), GFP_KERNEL);
if (!rx8010)
return -ENOMEM;
- rx8010->client = client;
i2c_set_clientdata(client, rx8010);
- err = rx8010_init_client(client);
+ rx8010->regs = devm_regmap_init_i2c(client, &rx8010_regmap_config);
+ if (IS_ERR(rx8010->regs))
+ return PTR_ERR(rx8010->regs);
+
+ err = rx8010_init(dev);
if (err)
return err;
+ rx8010->rtc = devm_rtc_allocate_device(dev);
+ if (IS_ERR(rx8010->rtc))
+ return PTR_ERR(rx8010->rtc);
+
if (client->irq > 0) {
- dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
- err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ dev_info(dev, "IRQ %d supplied\n", client->irq);
+ err = devm_request_threaded_irq(dev, client->irq, NULL,
rx8010_irq_1_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"rx8010", client);
-
if (err) {
- dev_err(&client->dev, "unable to request IRQ\n");
- client->irq = 0;
- } else {
- rx8010_rtc_ops.read_alarm = rx8010_read_alarm;
- rx8010_rtc_ops.set_alarm = rx8010_set_alarm;
- rx8010_rtc_ops.alarm_irq_enable = rx8010_alarm_irq_enable;
+ dev_err(dev, "unable to request IRQ\n");
+ return err;
}
- }
- rx8010->rtc = devm_rtc_device_register(&client->dev, client->name,
- &rx8010_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rx8010->rtc)) {
- dev_err(&client->dev, "unable to register the class device\n");
- return PTR_ERR(rx8010->rtc);
+ rx8010->rtc->ops = &rx8010_rtc_ops_alarm;
+ } else {
+ rx8010->rtc->ops = &rx8010_rtc_ops_default;
}
rx8010->rtc->max_user_freq = 1;
+ rx8010->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rx8010->rtc->range_max = RTC_TIMESTAMP_END_2099;
- return 0;
+ return rtc_register_device(rx8010->rtc);
}
static struct i2c_driver rx8010_driver = {
@@ -473,7 +427,7 @@ static struct i2c_driver rx8010_driver = {
.name = "rtc-rx8010",
.of_match_table = of_match_ptr(rx8010_of_match),
},
- .probe = rx8010_probe,
+ .probe_new = rx8010_probe,
.id_table = rx8010_id,
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 07:06:00 +0000