diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1307.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 154 |
1 files changed, 39 insertions, 115 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 162330b9d1dc..7e5155e88ac7 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -86,13 +86,11 @@ enum ds_type { struct ds1307 { - u8 reg_addr; u8 regs[11]; 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_msg msg[2]; struct i2c_client *client; struct rtc_device *rtc; struct work_struct work; @@ -204,13 +202,9 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t) int tmp; /* read the RTC date and time registers all at once */ - ds1307->reg_addr = 0; - ds1307->msg[1].flags = I2C_M_RD; - ds1307->msg[1].len = 7; - - tmp = i2c_transfer(to_i2c_adapter(ds1307->client->dev.parent), - ds1307->msg, 2); - if (tmp != 2) { + tmp = i2c_smbus_read_i2c_block_data(ds1307->client, + DS1307_REG_SECS, 7, ds1307->regs); + if (tmp != 7) { dev_err(dev, "%s error %d\n", "read", tmp); return -EIO; } @@ -257,7 +251,6 @@ 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); - *buf++ = 0; /* first register addr */ buf[DS1307_REG_SECS] = bin2bcd(t->tm_sec); buf[DS1307_REG_MIN] = bin2bcd(t->tm_min); buf[DS1307_REG_HOUR] = bin2bcd(t->tm_hour); @@ -282,23 +275,19 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) break; } - ds1307->msg[1].flags = 0; - ds1307->msg[1].len = 8; - dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", "write", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); - result = i2c_transfer(to_i2c_adapter(ds1307->client->dev.parent), - &ds1307->msg[1], 1); - if (result != 1) { - dev_err(dev, "%s error %d\n", "write", tmp); - return -EIO; + result = i2c_smbus_write_i2c_block_data(ds1307->client, 0, 7, buf); + if (result < 0) { + dev_err(dev, "%s error %d\n", "write", result); + return result; } return 0; } -static int ds1307_read_alarm(struct device *dev, struct rtc_wkalrm *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); @@ -308,13 +297,9 @@ static int ds1307_read_alarm(struct device *dev, struct rtc_wkalrm *t) return -EINVAL; /* read all ALARM1, ALARM2, and status registers at once */ - ds1307->reg_addr = DS1339_REG_ALARM1_SECS; - ds1307->msg[1].flags = I2C_M_RD; - ds1307->msg[1].len = 9; - - ret = i2c_transfer(to_i2c_adapter(client->dev.parent), - ds1307->msg, 2); - if (ret != 2) { + ret = i2c_smbus_read_i2c_block_data(client, + DS1339_REG_ALARM1_SECS, 9, ds1307->regs); + if (ret != 9) { dev_err(dev, "%s error %d\n", "alarm read", ret); return -EIO; } @@ -353,7 +338,7 @@ static int ds1307_read_alarm(struct device *dev, struct rtc_wkalrm *t) return 0; } -static int ds1307_set_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); @@ -371,13 +356,9 @@ static int ds1307_set_alarm(struct device *dev, struct rtc_wkalrm *t) t->enabled, t->pending); /* read current status of both alarms and the chip */ - ds1307->reg_addr = DS1339_REG_ALARM1_SECS; - ds1307->msg[1].flags = I2C_M_RD; - ds1307->msg[1].len = 9; - - ret = i2c_transfer(to_i2c_adapter(client->dev.parent), - ds1307->msg, 2); - if (ret != 2) { + ret = i2c_smbus_read_i2c_block_data(client, + DS1339_REG_ALARM1_SECS, 9, buf); + if (ret != 9) { dev_err(dev, "%s error %d\n", "alarm write", ret); return -EIO; } @@ -392,7 +373,6 @@ static int ds1307_set_alarm(struct device *dev, struct rtc_wkalrm *t) ds1307->regs[6], control, status); /* set ALARM1, using 24 hour and day-of-month modes */ - *buf++ = DS1339_REG_ALARM1_SECS; /* first register addr */ buf[0] = bin2bcd(t->time.tm_sec); buf[1] = bin2bcd(t->time.tm_min); buf[2] = bin2bcd(t->time.tm_hour); @@ -411,14 +391,11 @@ static int ds1307_set_alarm(struct device *dev, struct rtc_wkalrm *t) } buf[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I); - ds1307->msg[1].flags = 0; - ds1307->msg[1].len = 10; - - ret = i2c_transfer(to_i2c_adapter(client->dev.parent), - &ds1307->msg[1], 1); - if (ret != 1) { + ret = i2c_smbus_write_i2c_block_data(client, + DS1339_REG_ALARM1_SECS, 9, buf); + if (ret < 0) { dev_err(dev, "can't set alarm time\n"); - return -EIO; + return ret; } return 0; @@ -475,8 +452,8 @@ static int ds1307_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) static const struct rtc_class_ops ds13xx_rtc_ops = { .read_time = ds1307_get_time, .set_time = ds1307_set_time, - .read_alarm = ds1307_read_alarm, - .set_alarm = ds1307_set_alarm, + .read_alarm = ds1337_read_alarm, + .set_alarm = ds1337_set_alarm, .ioctl = ds1307_ioctl, }; @@ -490,7 +467,6 @@ ds1307_nvram_read(struct kobject *kobj, struct bin_attribute *attr, { struct i2c_client *client; struct ds1307 *ds1307; - struct i2c_msg msg[2]; int result; client = kobj_to_i2c_client(kobj); @@ -503,24 +479,10 @@ ds1307_nvram_read(struct kobject *kobj, struct bin_attribute *attr, if (unlikely(!count)) return count; - msg[0].addr = client->addr; - msg[0].flags = 0; - msg[0].len = 1; - msg[0].buf = buf; - - buf[0] = 8 + off; - - msg[1].addr = client->addr; - msg[1].flags = I2C_M_RD; - msg[1].len = count; - msg[1].buf = buf; - - result = i2c_transfer(to_i2c_adapter(client->dev.parent), msg, 2); - if (result != 2) { + result = i2c_smbus_read_i2c_block_data(client, 8 + off, count, buf); + if (result < 0) dev_err(&client->dev, "%s error %d\n", "nvram read", result); - return -EIO; - } - return count; + return result; } static ssize_t @@ -528,8 +490,7 @@ ds1307_nvram_write(struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct i2c_client *client; - u8 buffer[NVRAM_SIZE + 1]; - int ret; + int result; client = kobj_to_i2c_client(kobj); @@ -540,11 +501,12 @@ ds1307_nvram_write(struct kobject *kobj, struct bin_attribute *attr, if (unlikely(!count)) return count; - buffer[0] = 8 + off; - memcpy(buffer + 1, buf, count); - - ret = i2c_master_send(client, buffer, count + 1); - return (ret < 0) ? ret : (ret - 1); + result = i2c_smbus_write_i2c_block_data(client, 8 + off, count, buf); + if (result < 0) { + dev_err(&client->dev, "%s error %d\n", "nvram write", result); + return result; + } + return count; } static struct bin_attribute nvram = { @@ -571,9 +533,11 @@ static int __devinit ds1307_probe(struct i2c_client *client, const struct chip_desc *chip = &chips[id->driver_data]; struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); int want_irq = false; + unsigned char *buf; if (!i2c_check_functionality(adapter, - I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) + I2C_FUNC_SMBUS_WRITE_BYTE_DATA | + I2C_FUNC_SMBUS_I2C_BLOCK)) return -EIO; if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) @@ -581,18 +545,8 @@ static int __devinit ds1307_probe(struct i2c_client *client, ds1307->client = client; i2c_set_clientdata(client, ds1307); - - ds1307->msg[0].addr = client->addr; - ds1307->msg[0].flags = 0; - ds1307->msg[0].len = 1; - ds1307->msg[0].buf = &ds1307->reg_addr; - - ds1307->msg[1].addr = client->addr; - ds1307->msg[1].flags = I2C_M_RD; - ds1307->msg[1].len = sizeof(ds1307->regs); - ds1307->msg[1].buf = ds1307->regs; - ds1307->type = id->driver_data; + buf = ds1307->regs; switch (ds1307->type) { case ds_1337: @@ -602,21 +556,15 @@ static int __devinit ds1307_probe(struct i2c_client *client, INIT_WORK(&ds1307->work, ds1307_work); want_irq = true; } - - ds1307->reg_addr = DS1337_REG_CONTROL; - ds1307->msg[1].len = 2; - /* get registers that the "rtc" read below won't read... */ - tmp = i2c_transfer(adapter, ds1307->msg, 2); + tmp = i2c_smbus_read_i2c_block_data(ds1307->client, + DS1337_REG_CONTROL, 2, buf); if (tmp != 2) { pr_debug("read error %d\n", tmp); err = -EIO; goto exit_free; } - ds1307->reg_addr = 0; - ds1307->msg[1].len = sizeof(ds1307->regs); - /* oscillator off? turn it on, so clock can tick. */ if (ds1307->regs[0] & DS1337_BIT_nEOSC) ds1307->regs[0] &= ~DS1337_BIT_nEOSC; @@ -647,9 +595,8 @@ static int __devinit ds1307_probe(struct i2c_client *client, read_rtc: /* read RTC registers */ - - tmp = i2c_transfer(adapter, ds1307->msg, 2); - if (tmp != 2) { + tmp = i2c_smbus_read_i2c_block_data(ds1307->client, 0, 8, buf); + if (tmp != 8) { pr_debug("read error %d\n", tmp); err = -EIO; goto exit_free; @@ -707,22 +654,6 @@ read_rtc: break; } - tmp = ds1307->regs[DS1307_REG_SECS]; - tmp = bcd2bin(tmp & 0x7f); - if (tmp > 60) - goto exit_bad; - tmp = bcd2bin(ds1307->regs[DS1307_REG_MIN] & 0x7f); - if (tmp > 60) - goto exit_bad; - - tmp = bcd2bin(ds1307->regs[DS1307_REG_MDAY] & 0x3f); - if (tmp == 0 || tmp > 31) - goto exit_bad; - - tmp = bcd2bin(ds1307->regs[DS1307_REG_MONTH] & 0x1f); - if (tmp == 0 || tmp > 12) - goto exit_bad; - tmp = ds1307->regs[DS1307_REG_HOUR]; switch (ds1307->type) { case ds_1340: @@ -779,13 +710,6 @@ read_rtc: return 0; -exit_bad: - dev_dbg(&client->dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", - "bogus register", - ds1307->regs[0], ds1307->regs[1], - ds1307->regs[2], ds1307->regs[3], - ds1307->regs[4], ds1307->regs[5], - ds1307->regs[6]); exit_irq: if (ds1307->rtc) rtc_device_unregister(ds1307->rtc); |