rtc: rv3029: convert to use regmap
authorMylène Josserand <mylene.josserand@free-electrons.com>
Tue, 3 May 2016 09:54:33 +0000 (11:54 +0200)
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>
Sat, 21 May 2016 15:04:11 +0000 (17:04 +0200)
To add support of rv3049, the current driver is converted to use regmap.

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
drivers/rtc/rtc-rv3029c2.c

index 091be483e3e9fe53a71423b4d469116ec0cc57d1..96dd1665220c55550caea644d11b384a087d4292 100644 (file)
@@ -20,7 +20,7 @@
 #include <linux/of.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
-
+#include <linux/regmap.h>
 
 /* Register map */
 /* control section */
 #define RV3029_USR2_RAM_PAGE           0x3C
 #define RV3029_USR2_SECTION_LEN                0x04
 
-static int rv3029_read_regs(struct i2c_client *client, u8 reg, u8 *buf,
+struct rv3029_data {
+       struct device           *dev;
+       struct rtc_device       *rtc;
+       struct regmap           *regmap;
+       int irq;
+};
+
+static int rv3029_read_regs(struct device *dev, u8 reg, u8 *buf,
                            unsigned len)
 {
-       int ret;
+       struct rv3029_data *rv3029 = dev_get_drvdata(dev);
 
        if ((reg > RV3029_USR1_RAM_PAGE + 7) ||
                (reg + len > RV3029_USR1_RAM_PAGE + 8))
                return -EINVAL;
 
-       ret = i2c_smbus_read_i2c_block_data(client, reg, len, buf);
-       if (ret < 0)
-               return ret;
-       if (ret < len)
-               return -EIO;
-       return 0;
+       return regmap_bulk_read(rv3029->regmap, reg, buf, len);
 }
 
-static int rv3029_write_regs(struct i2c_client *client, u8 reg, u8 const buf[],
+static int rv3029_write_regs(struct device *dev, u8 reg, u8 const buf[],
                             unsigned len)
 {
+       struct rv3029_data *rv3029 = dev_get_drvdata(dev);
+
        if ((reg > RV3029_USR1_RAM_PAGE + 7) ||
                (reg + len > RV3029_USR1_RAM_PAGE + 8))
                return -EINVAL;
 
-       return i2c_smbus_write_i2c_block_data(client, reg, len, buf);
+       return regmap_bulk_write(rv3029->regmap, reg, buf, len);
 }
 
-static int rv3029_update_bits(struct i2c_client *client, u8 reg, u8 mask,
-                             u8 set)
+static int rv3029_update_bits(struct device *dev, u8 reg, u8 mask, u8 set)
 {
        u8 buf;
        int ret;
 
-       ret = rv3029_read_regs(client, reg, &buf, 1);
+       ret = rv3029_read_regs(dev, reg, &buf, 1);
        if (ret < 0)
                return ret;
        buf &= ~mask;
        buf |= set & mask;
-       ret = rv3029_write_regs(client, reg, &buf, 1);
+       ret = rv3029_write_regs(dev, reg, &buf, 1);
        if (ret < 0)
                return ret;
 
        return 0;
 }
 
-static int rv3029_get_sr(struct i2c_client *client, u8 *buf)
+static int rv3029_get_sr(struct device *dev, u8 *buf)
 {
-       int ret = rv3029_read_regs(client, RV3029_STATUS, buf, 1);
+       int ret = rv3029_read_regs(dev, RV3029_STATUS, buf, 1);
 
        if (ret < 0)
                return -EIO;
-       dev_dbg(&client->dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
+       dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
        return 0;
 }
 
-static int rv3029_set_sr(struct i2c_client *client, u8 val)
+static int rv3029_set_sr(struct device *dev, u8 val)
 {
        u8 buf[1];
        int sr;
 
        buf[0] = val;
-       sr = rv3029_write_regs(client, RV3029_STATUS, buf, 1);
-       dev_dbg(&client->dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
+       sr = rv3029_write_regs(dev, RV3029_STATUS, buf, 1);
+       dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
        if (sr < 0)
                return -EIO;
        return 0;
 }
 
-static int rv3029_eeprom_busywait(struct i2c_client *client)
+static int rv3029_eeprom_busywait(struct device *dev)
 {
        int i, ret;
        u8 sr;
 
        for (i = 100; i > 0; i--) {
-               ret = rv3029_get_sr(client, &sr);
+               ret = rv3029_get_sr(dev, &sr);
                if (ret < 0)
                        break;
                if (!(sr & RV3029_STATUS_EEBUSY))
@@ -198,28 +201,28 @@ static int rv3029_eeprom_busywait(struct i2c_client *client)
                usleep_range(1000, 10000);
        }
        if (i <= 0) {
-               dev_err(&client->dev, "EEPROM busy wait timeout.\n");
+               dev_err(dev, "EEPROM busy wait timeout.\n");
                return -ETIMEDOUT;
        }
 
        return ret;
 }
 
-static int rv3029_eeprom_exit(struct i2c_client *client)
+static int rv3029_eeprom_exit(struct device *dev)
 {
        /* Re-enable eeprom refresh */
-       return rv3029_update_bits(client, RV3029_ONOFF_CTRL,
+       return rv3029_update_bits(dev, RV3029_ONOFF_CTRL,
                                  RV3029_ONOFF_CTRL_EERE,
                                  RV3029_ONOFF_CTRL_EERE);
 }
 
-static int rv3029_eeprom_enter(struct i2c_client *client)
+static int rv3029_eeprom_enter(struct device *dev)
 {
        int ret;
        u8 sr;
 
        /* Check whether we are in the allowed voltage range. */
-       ret = rv3029_get_sr(client, &sr);
+       ret = rv3029_get_sr(dev, &sr);
        if (ret < 0)
                return ret;
        if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
@@ -228,119 +231,118 @@ static int rv3029_eeprom_enter(struct i2c_client *client)
                 */
                sr &= ~RV3029_STATUS_VLOW1;
                sr &= ~RV3029_STATUS_VLOW2;
-               ret = rv3029_set_sr(client, sr);
+               ret = rv3029_set_sr(dev, sr);
                if (ret < 0)
                        return ret;
                usleep_range(1000, 10000);
-               ret = rv3029_get_sr(client, &sr);
+               ret = rv3029_get_sr(dev, &sr);
                if (ret < 0)
                        return ret;
                if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
-                       dev_err(&client->dev,
+                       dev_err(dev,
                                "Supply voltage is too low to safely access the EEPROM.\n");
                        return -ENODEV;
                }
        }
 
        /* Disable eeprom refresh. */
-       ret = rv3029_update_bits(client, RV3029_ONOFF_CTRL,
-                                RV3029_ONOFF_CTRL_EERE, 0);
+       ret = rv3029_update_bits(dev, RV3029_ONOFF_CTRL, RV3029_ONOFF_CTRL_EERE,
+                                0);
        if (ret < 0)
                return ret;
 
        /* Wait for any previous eeprom accesses to finish. */
-       ret = rv3029_eeprom_busywait(client);
+       ret = rv3029_eeprom_busywait(dev);
        if (ret < 0)
-               rv3029_eeprom_exit(client);
+               rv3029_eeprom_exit(dev);
 
        return ret;
 }
 
-static int rv3029_eeprom_read(struct i2c_client *client, u8 reg,
+static int rv3029_eeprom_read(struct device *dev, u8 reg,
                              u8 buf[], size_t len)
 {
        int ret, err;
 
-       err = rv3029_eeprom_enter(client);
+       err = rv3029_eeprom_enter(dev);
        if (err < 0)
                return err;
 
-       ret = rv3029_read_regs(client, reg, buf, len);
+       ret = rv3029_read_regs(dev, reg, buf, len);
 
-       err = rv3029_eeprom_exit(client);
+       err = rv3029_eeprom_exit(dev);
        if (err < 0)
                return err;
 
        return ret;
 }
 
-static int rv3029_eeprom_write(struct i2c_client *client, u8 reg,
+static int rv3029_eeprom_write(struct device *dev, u8 reg,
                               u8 const buf[], size_t len)
 {
        int ret, err;
        size_t i;
        u8 tmp;
 
-       err = rv3029_eeprom_enter(client);
+       err = rv3029_eeprom_enter(dev);
        if (err < 0)
                return err;
 
        for (i = 0; i < len; i++, reg++) {
-               ret = rv3029_read_regs(client, reg, &tmp, 1);
+               ret = rv3029_read_regs(dev, reg, &tmp, 1);
                if (ret < 0)
                        break;
                if (tmp != buf[i]) {
-                       ret = rv3029_write_regs(client, reg, &buf[i], 1);
+                       ret = rv3029_write_regs(dev, reg, &buf[i], 1);
                        if (ret < 0)
                                break;
                }
-               ret = rv3029_eeprom_busywait(client);
+               ret = rv3029_eeprom_busywait(dev);
                if (ret < 0)
                        break;
        }
 
-       err = rv3029_eeprom_exit(client);
+       err = rv3029_eeprom_exit(dev);
        if (err < 0)
                return err;
 
        return ret;
 }
 
-static int rv3029_eeprom_update_bits(struct i2c_client *client,
+static int rv3029_eeprom_update_bits(struct device *dev,
                                     u8 reg, u8 mask, u8 set)
 {
        u8 buf;
        int ret;
 
-       ret = rv3029_eeprom_read(client, reg, &buf, 1);
+       ret = rv3029_eeprom_read(dev, reg, &buf, 1);
        if (ret < 0)
                return ret;
        buf &= ~mask;
        buf |= set & mask;
-       ret = rv3029_eeprom_write(client, reg, &buf, 1);
+       ret = rv3029_eeprom_write(dev, reg, &buf, 1);
        if (ret < 0)
                return ret;
 
        return 0;
 }
 
-static int rv3029_read_time(struct i2c_client *client, struct rtc_time *tm)
+static int rv3029_read_time(struct device *dev, struct rtc_time *tm)
 {
        u8 buf[1];
        int ret;
        u8 regs[RV3029_WATCH_SECTION_LEN] = { 0, };
 
-       ret = rv3029_get_sr(client, buf);
+       ret = rv3029_get_sr(dev, buf);
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+               dev_err(dev, "%s: reading SR failed\n", __func__);
                return -EIO;
        }
 
-       ret = rv3029_read_regs(client, RV3029_W_SEC, regs,
+       ret = rv3029_read_regs(dev, RV3029_W_SEC, regs,
                               RV3029_WATCH_SECTION_LEN);
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading RTC section failed\n",
-                       __func__);
+               dev_err(dev, "%s: reading RTC section failed\n", __func__);
                return ret;
        }
 
@@ -368,30 +370,23 @@ static int rv3029_read_time(struct i2c_client *client, struct rtc_time *tm)
        return 0;
 }
 
-static int rv3029_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
-       return rv3029_read_time(to_i2c_client(dev), tm);
-}
-
-static int rv3029_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-       struct i2c_client *client = to_i2c_client(dev);
        struct rtc_time *const tm = &alarm->time;
        int ret;
        u8 regs[8];
 
-       ret = rv3029_get_sr(client, regs);
+       ret = rv3029_get_sr(dev, regs);
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+               dev_err(dev, "%s: reading SR failed\n", __func__);
                return -EIO;
        }
 
-       ret = rv3029_read_regs(client, RV3029_A_SC, regs,
+       ret = rv3029_read_regs(dev, RV3029_A_SC, regs,
                               RV3029_ALARM_SECTION_LEN);
 
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading alarm section failed\n",
-                       __func__);
+               dev_err(dev, "%s: reading alarm section failed\n", __func__);
                return ret;
        }
 
@@ -406,25 +401,23 @@ static int rv3029_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
        return 0;
 }
 
-static int rv3029_rtc_alarm_set_irq(struct i2c_client *client, int enable)
+static int rv3029_rtc_alarm_set_irq(struct device *dev, int enable)
 {
        int ret;
 
        /* enable/disable AIE irq */
-       ret = rv3029_update_bits(client, RV3029_IRQ_CTRL,
-                                RV3029_IRQ_CTRL_AIE,
+       ret = rv3029_update_bits(dev, RV3029_IRQ_CTRL, RV3029_IRQ_CTRL_AIE,
                                 (enable ? RV3029_IRQ_CTRL_AIE : 0));
        if (ret < 0) {
-               dev_err(&client->dev, "can't update INT reg\n");
+               dev_err(dev, "can't update INT reg\n");
                return ret;
        }
 
        return 0;
 }
 
-static int rv3029_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+static int rv3029_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-       struct i2c_client *client = to_i2c_client(dev);
        struct rtc_time *const tm = &alarm->time;
        int ret;
        u8 regs[8];
@@ -437,9 +430,9 @@ static int rv3029_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
        if (tm->tm_year < 100)
                return -EINVAL;
 
-       ret = rv3029_get_sr(client, regs);
+       ret = rv3029_get_sr(dev, regs);
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+               dev_err(dev, "%s: reading SR failed\n", __func__);
                return -EIO;
        }
        regs[RV3029_A_SC-RV3029_A_SC] = bin2bcd(tm->tm_sec & 0x7f);
@@ -450,38 +443,38 @@ static int rv3029_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
        regs[RV3029_A_DW-RV3029_A_SC] = bin2bcd((tm->tm_wday & 7) - 1);
        regs[RV3029_A_YR-RV3029_A_SC] = bin2bcd((tm->tm_year & 0x7f) - 100);
 
-       ret = rv3029_write_regs(client, RV3029_A_SC, regs,
+       ret = rv3029_write_regs(dev, RV3029_A_SC, regs,
                                RV3029_ALARM_SECTION_LEN);
        if (ret < 0)
                return ret;
 
        if (alarm->enabled) {
                /* clear AF flag */
-               ret = rv3029_update_bits(client, RV3029_IRQ_FLAGS,
+               ret = rv3029_update_bits(dev, RV3029_IRQ_FLAGS,
                                         RV3029_IRQ_FLAGS_AF, 0);
                if (ret < 0) {
-                       dev_err(&client->dev, "can't clear alarm flag\n");
+                       dev_err(dev, "can't clear alarm flag\n");
                        return ret;
                }
                /* enable AIE irq */
-               ret = rv3029_rtc_alarm_set_irq(client, 1);
+               ret = rv3029_rtc_alarm_set_irq(dev, 1);
                if (ret)
                        return ret;
 
-               dev_dbg(&client->dev, "alarm IRQ armed\n");
+               dev_dbg(dev, "alarm IRQ armed\n");
        } else {
                /* disable AIE irq */
-               ret = rv3029_rtc_alarm_set_irq(client, 0);
+               ret = rv3029_rtc_alarm_set_irq(dev, 0);
                if (ret)
                        return ret;
 
-               dev_dbg(&client->dev, "alarm IRQ disabled\n");
+               dev_dbg(dev, "alarm IRQ disabled\n");
        }
 
        return 0;
 }
 
-static int rv3029_set_time(struct i2c_client *client, struct rtc_time const *tm)
+static int rv3029_set_time(struct device *dev, struct rtc_time *tm)
 {
        u8 regs[8];
        int ret;
@@ -502,31 +495,25 @@ static int rv3029_set_time(struct i2c_client *client, struct rtc_time const *tm)
        regs[RV3029_W_DAYS-RV3029_W_SEC] = bin2bcd((tm->tm_wday & 7)+1);
        regs[RV3029_W_YEARS-RV3029_W_SEC] = bin2bcd(tm->tm_year - 100);
 
-       ret = rv3029_write_regs(client, RV3029_W_SEC, regs,
+       ret = rv3029_write_regs(dev, RV3029_W_SEC, regs,
                                RV3029_WATCH_SECTION_LEN);
        if (ret < 0)
                return ret;
 
-       ret = rv3029_get_sr(client, regs);
+       ret = rv3029_get_sr(dev, regs);
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+               dev_err(dev, "%s: reading SR failed\n", __func__);
                return ret;
        }
        /* clear PON bit */
-       ret = rv3029_set_sr(client, (regs[0] & ~RV3029_STATUS_PON));
+       ret = rv3029_set_sr(dev, (regs[0] & ~RV3029_STATUS_PON));
        if (ret < 0) {
-               dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+               dev_err(dev, "%s: reading SR failed\n", __func__);
                return ret;
        }
 
        return 0;
 }
-
-static int rv3029_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
-       return rv3029_set_time(to_i2c_client(dev), tm);
-}
-
 static const struct rv3029_trickle_tab_elem {
        u32 r;          /* resistance in ohms */
        u8 conf;        /* trickle config bits */
@@ -584,9 +571,9 @@ static const struct rv3029_trickle_tab_elem {
        },
 };
 
-static void rv3029_trickle_config(struct i2c_client *client)
+static void rv3029_trickle_config(struct device *dev)
 {
-       struct device_node *of_node = client->dev.of_node;
+       struct device_node *of_node = dev->of_node;
        const struct rv3029_trickle_tab_elem *elem;
        int i, err;
        u32 ohms;
@@ -608,27 +595,26 @@ static void rv3029_trickle_config(struct i2c_client *client)
                                break;
                }
                trickle_set_bits = elem->conf;
-               dev_info(&client->dev,
+               dev_info(dev,
                         "Trickle charger enabled at %d ohms resistance.\n",
                         elem->r);
        }
-       err = rv3029_eeprom_update_bits(client, RV3029_CONTROL_E2P_EECTRL,
+       err = rv3029_eeprom_update_bits(dev, RV3029_CONTROL_E2P_EECTRL,
                                        RV3029_TRICKLE_MASK,
                                        trickle_set_bits);
        if (err < 0) {
-               dev_err(&client->dev,
-                       "Failed to update trickle charger config\n");
+               dev_err(dev, "Failed to update trickle charger config\n");
        }
 }
 
 #ifdef CONFIG_RTC_DRV_RV3029_HWMON
 
-static int rv3029_read_temp(struct i2c_client *client, int *temp_mC)
+static int rv3029_read_temp(struct device *dev, int *temp_mC)
 {
        int ret;
        u8 temp;
 
-       ret = rv3029_read_regs(client, RV3029_TEMP_PAGE, &temp, 1);
+       ret = rv3029_read_regs(dev, RV3029_TEMP_PAGE, &temp, 1);
        if (ret < 0)
                return ret;
 
@@ -641,10 +627,9 @@ static ssize_t rv3029_hwmon_show_temp(struct device *dev,
                                      struct device_attribute *attr,
                                      char *buf)
 {
-       struct i2c_client *client = dev_get_drvdata(dev);
        int ret, temp_mC;
 
-       ret = rv3029_read_temp(client, &temp_mC);
+       ret = rv3029_read_temp(dev, &temp_mC);
        if (ret < 0)
                return ret;
 
@@ -656,7 +641,6 @@ static ssize_t rv3029_hwmon_set_update_interval(struct device *dev,
                                                const char *buf,
                                                size_t count)
 {
-       struct i2c_client *client = dev_get_drvdata(dev);
        unsigned long interval_ms;
        int ret;
        u8 th_set_bits = 0;
@@ -670,7 +654,7 @@ static ssize_t rv3029_hwmon_set_update_interval(struct device *dev,
                if (interval_ms >= 16000)
                        th_set_bits |= RV3029_EECTRL_THP;
        }
-       ret = rv3029_eeprom_update_bits(client, RV3029_CONTROL_E2P_EECTRL,
+       ret = rv3029_eeprom_update_bits(dev, RV3029_CONTROL_E2P_EECTRL,
                                        RV3029_EECTRL_THE | RV3029_EECTRL_THP,
                                        th_set_bits);
        if (ret < 0)
@@ -683,11 +667,10 @@ static ssize_t rv3029_hwmon_show_update_interval(struct device *dev,
                                                 struct device_attribute *attr,
                                                 char *buf)
 {
-       struct i2c_client *client = dev_get_drvdata(dev);
        int ret, interval_ms;
        u8 eectrl;
 
-       ret = rv3029_eeprom_read(client, RV3029_CONTROL_E2P_EECTRL,
+       ret = rv3029_eeprom_read(dev, RV3029_CONTROL_E2P_EECTRL,
                                 &eectrl, 1);
        if (ret < 0)
                return ret;
@@ -717,32 +700,32 @@ static struct attribute *rv3029_hwmon_attrs[] = {
 };
 ATTRIBUTE_GROUPS(rv3029_hwmon);
 
-static void rv3029_hwmon_register(struct i2c_client *client)
+static void rv3029_hwmon_register(struct device *dev, const char *name)
 {
+       struct rv3029_data *rv3029 = dev_get_drvdata(dev);
        struct device *hwmon_dev;
 
-       hwmon_dev = devm_hwmon_device_register_with_groups(
-               &client->dev, client->name, client, rv3029_hwmon_groups);
+       hwmon_dev = devm_hwmon_device_register_with_groups(dev, name, rv3029,
+                                                          rv3029_hwmon_groups);
        if (IS_ERR(hwmon_dev)) {
-               dev_warn(&client->dev,
-                        "unable to register hwmon device %ld\n",
+               dev_warn(dev, "unable to register hwmon device %ld\n",
                         PTR_ERR(hwmon_dev));
        }
 }
 
 #else /* CONFIG_RTC_DRV_RV3029_HWMON */
 
-static void rv3029_hwmon_register(struct i2c_client *client)
+static void rv3029_hwmon_register(struct device *dev, const char *name)
 {
 }
 
 #endif /* CONFIG_RTC_DRV_RV3029_HWMON */
 
 static const struct rtc_class_ops rv3029_rtc_ops = {
-       .read_time      = rv3029_rtc_read_time,
-       .set_time       = rv3029_rtc_set_time,
-       .read_alarm     = rv3029_rtc_read_alarm,
-       .set_alarm      = rv3029_rtc_set_alarm,
+       .read_time      = rv3029_read_time,
+       .set_time       = rv3029_set_time,
+       .read_alarm     = rv3029_read_alarm,
+       .set_alarm      = rv3029_set_alarm,
 };
 
 static struct i2c_device_id rv3029_id[] = {
@@ -752,41 +735,67 @@ static struct i2c_device_id rv3029_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, rv3029_id);
 
-static int rv3029_probe(struct i2c_client *client,
-                       const struct i2c_device_id *id)
+static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
+                       const char *name)
 {
-       struct rtc_device *rtc;
+       struct rv3029_data *rv3029;
        int rc = 0;
        u8 buf[1];
 
-       if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL))
-               return -ENODEV;
+       rv3029 = devm_kzalloc(dev, sizeof(*rv3029), GFP_KERNEL);
+       if (!rv3029)
+               return -ENOMEM;
+
+       rv3029->regmap = regmap;
+       rv3029->irq = irq;
+       rv3029->dev = dev;
+       dev_set_drvdata(dev, rv3029);
 
-       rc = rv3029_get_sr(client, buf);
+       rc = rv3029_get_sr(dev, buf);
        if (rc < 0) {
-               dev_err(&client->dev, "reading status failed\n");
+               dev_err(dev, "reading status failed\n");
                return rc;
        }
 
-       rv3029_trickle_config(client);
-       rv3029_hwmon_register(client);
+       rv3029_trickle_config(dev);
+       rv3029_hwmon_register(dev, name);
+
+       rv3029->rtc = devm_rtc_device_register(dev, name, &rv3029_rtc_ops,
+                                              THIS_MODULE);
 
-       rtc = devm_rtc_device_register(&client->dev, client->name,
-                                      &rv3029_rtc_ops, THIS_MODULE);
+       return PTR_ERR_OR_ZERO(rv3029->rtc);
+}
 
-       if (IS_ERR(rtc))
-               return PTR_ERR(rtc);
+static int rv3029_i2c_probe(struct i2c_client *client,
+                           const struct i2c_device_id *id)
+{
+       struct regmap *regmap;
+       static const struct regmap_config config = {
+               .reg_bits = 8,
+               .val_bits = 8,
+       };
+
+       if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK |
+                                    I2C_FUNC_SMBUS_BYTE)) {
+               dev_err(&client->dev, "Adapter does not support SMBUS_I2C_BLOCK or SMBUS_I2C_BYTE\n");
+               return -ENODEV;
+       }
 
-       i2c_set_clientdata(client, rtc);
+       regmap = devm_regmap_init_i2c(client, &config);
+       if (IS_ERR(regmap)) {
+               dev_err(&client->dev, "%s: regmap allocation failed: %ld\n",
+                       __func__, PTR_ERR(regmap));
+               return PTR_ERR(regmap);
+       }
 
-       return 0;
+       return rv3029_probe(&client->dev, regmap, client->irq, client->name);
 }
 
 static struct i2c_driver rv3029_driver = {
        .driver = {
                .name = "rtc-rv3029c2",
        },
-       .probe          = rv3029_probe,
+       .probe          = rv3029_i2c_probe,
        .id_table       = rv3029_id,
 };
 
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