X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Frtc%2Frtc-rs5c372.c;h=e7851e3739abd11030cdf0a724da2436315164dd;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=7553d797603fd86d78a266d578765e439ea5aced;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c index 7553d7976..e7851e373 100644 --- a/drivers/rtc/rtc-rs5c372.c +++ b/drivers/rtc/rtc-rs5c372.c @@ -1,5 +1,5 @@ /* - * An I2C driver for the Ricoh RS5C372 RTC + * An I2C driver for Ricoh RS5C372 and RV5C38[67] RTCs * * Copyright (C) 2005 Pavel Mironchik * Copyright (C) 2006 Tower Technologies @@ -13,7 +13,7 @@ #include #include -#define DRV_VERSION "0.2" +#define DRV_VERSION "0.4" /* Addresses to scan */ static unsigned short normal_i2c[] = { /* 0x32,*/ I2C_CLIENT_END }; @@ -21,6 +21,13 @@ static unsigned short normal_i2c[] = { /* 0x32,*/ I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD; + +/* + * Ricoh has a family of I2C based RTCs, which differ only slightly from + * each other. Differences center on pinout (e.g. how many interrupts, + * output clock, etc) and how the control registers are used. The '372 + * is significant only because that's the one this driver first supported. + */ #define RS5C372_REG_SECS 0 #define RS5C372_REG_MINS 1 #define RS5C372_REG_HOURS 2 @@ -29,53 +36,142 @@ I2C_CLIENT_INSMOD; #define RS5C372_REG_MONTH 5 #define RS5C372_REG_YEAR 6 #define RS5C372_REG_TRIM 7 +# define RS5C372_TRIM_XSL 0x80 +# define RS5C372_TRIM_MASK 0x7F + +#define RS5C_REG_ALARM_A_MIN 8 /* or ALARM_W */ +#define RS5C_REG_ALARM_A_HOURS 9 +#define RS5C_REG_ALARM_A_WDAY 10 + +#define RS5C_REG_ALARM_B_MIN 11 /* or ALARM_D */ +#define RS5C_REG_ALARM_B_HOURS 12 +#define RS5C_REG_ALARM_B_WDAY 13 /* (ALARM_B only) */ + +#define RS5C_REG_CTRL1 14 +# define RS5C_CTRL1_AALE (1 << 7) /* or WALE */ +# define RS5C_CTRL1_BALE (1 << 6) /* or DALE */ +# define RV5C387_CTRL1_24 (1 << 5) +# define RS5C372A_CTRL1_SL1 (1 << 5) +# define RS5C_CTRL1_CT_MASK (7 << 0) +# define RS5C_CTRL1_CT0 (0 << 0) /* no periodic irq */ +# define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */ +#define RS5C_REG_CTRL2 15 +# define RS5C372_CTRL2_24 (1 << 5) +# define RS5C_CTRL2_XSTP (1 << 4) +# define RS5C_CTRL2_CTFG (1 << 2) +# define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */ +# define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */ + + +/* to read (style 1) or write registers starting at R */ +#define RS5C_ADDR(R) (((R) << 4) | 0) + + +enum rtc_type { + rtc_undef = 0, + rtc_rs5c372a, + rtc_rs5c372b, + rtc_rv5c386, + rtc_rv5c387a, +}; -#define RS5C372_TRIM_XSL 0x80 -#define RS5C372_TRIM_MASK 0x7F +/* REVISIT: this assumes that: + * - we're in the 21st century, so it's safe to ignore the century + * bit for rv5c38[67] (REG_MONTH bit 7); + * - we should use ALARM_A not ALARM_B (may be wrong on some boards) + */ +struct rs5c372 { + struct i2c_client *client; + struct rtc_device *rtc; + enum rtc_type type; + unsigned time24:1; + unsigned has_irq:1; + char buf[17]; + char *regs; + + /* on conversion to a "new style" i2c driver, this vanishes */ + struct i2c_client dev; +}; -#define RS5C372_REG_BASE 0 +static int rs5c_get_regs(struct rs5c372 *rs5c) +{ + struct i2c_client *client = rs5c->client; + struct i2c_msg msgs[] = { + { client->addr, I2C_M_RD, sizeof rs5c->buf, rs5c->buf }, + }; -static int rs5c372_attach(struct i2c_adapter *adapter); -static int rs5c372_detach(struct i2c_client *client); -static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind); + /* This implements the third reading method from the datasheet, using + * an internal address that's reset after each transaction (by STOP) + * to 0x0f ... so we read extra registers, and skip the first one. + * + * The first method doesn't work with the iop3xx adapter driver, on at + * least 80219 chips; this works around that bug. + */ + if ((i2c_transfer(client->adapter, msgs, 1)) != 1) { + pr_debug("%s: can't read registers\n", rs5c->rtc->name); + return -EIO; + } -static struct i2c_driver rs5c372_driver = { - .driver = { - .name = "rs5c372", - }, - .attach_adapter = &rs5c372_attach, - .detach_client = &rs5c372_detach, -}; + dev_dbg(&client->dev, + "%02x %02x %02x (%02x) %02x %02x %02x (%02x), " + "%02x %02x %02x, %02x %02x %02x; %02x %02x\n", + rs5c->regs[0], rs5c->regs[1], rs5c->regs[2], rs5c->regs[3], + rs5c->regs[4], rs5c->regs[5], rs5c->regs[6], rs5c->regs[7], + rs5c->regs[8], rs5c->regs[9], rs5c->regs[10], rs5c->regs[11], + rs5c->regs[12], rs5c->regs[13], rs5c->regs[14], rs5c->regs[15]); + + return 0; +} + +static unsigned rs5c_reg2hr(struct rs5c372 *rs5c, unsigned reg) +{ + unsigned hour; + + if (rs5c->time24) + return BCD2BIN(reg & 0x3f); + + hour = BCD2BIN(reg & 0x1f); + if (hour == 12) + hour = 0; + if (reg & 0x20) + hour += 12; + return hour; +} + +static unsigned rs5c_hr2reg(struct rs5c372 *rs5c, unsigned hour) +{ + if (rs5c->time24) + return BIN2BCD(hour); + + if (hour > 12) + return 0x20 | BIN2BCD(hour - 12); + if (hour == 12) + return 0x20 | BIN2BCD(12); + if (hour == 0) + return BIN2BCD(12); + return BIN2BCD(hour); +} static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm) { - unsigned char buf[7] = { RS5C372_REG_BASE }; + struct rs5c372 *rs5c = i2c_get_clientdata(client); + int status = rs5c_get_regs(rs5c); - /* this implements the 1st reading method, according - * to the datasheet. buf[0] is initialized with - * address ptr and transmission format register. - */ - struct i2c_msg msgs[] = { - { client->addr, 0, 1, buf }, - { client->addr, I2C_M_RD, 7, buf }, - }; + if (status < 0) + return status; - if ((i2c_transfer(client->adapter, msgs, 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); - return -EIO; - } + tm->tm_sec = BCD2BIN(rs5c->regs[RS5C372_REG_SECS] & 0x7f); + tm->tm_min = BCD2BIN(rs5c->regs[RS5C372_REG_MINS] & 0x7f); + tm->tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C372_REG_HOURS]); - tm->tm_sec = BCD2BIN(buf[RS5C372_REG_SECS] & 0x7f); - tm->tm_min = BCD2BIN(buf[RS5C372_REG_MINS] & 0x7f); - tm->tm_hour = BCD2BIN(buf[RS5C372_REG_HOURS] & 0x3f); - tm->tm_wday = BCD2BIN(buf[RS5C372_REG_WDAY] & 0x07); - tm->tm_mday = BCD2BIN(buf[RS5C372_REG_DAY] & 0x3f); + tm->tm_wday = BCD2BIN(rs5c->regs[RS5C372_REG_WDAY] & 0x07); + tm->tm_mday = BCD2BIN(rs5c->regs[RS5C372_REG_DAY] & 0x3f); /* tm->tm_mon is zero-based */ - tm->tm_mon = BCD2BIN(buf[RS5C372_REG_MONTH] & 0x1f) - 1; + tm->tm_mon = BCD2BIN(rs5c->regs[RS5C372_REG_MONTH] & 0x1f) - 1; /* year is 1900 + tm->tm_year */ - tm->tm_year = BCD2BIN(buf[RS5C372_REG_YEAR]) + 100; + tm->tm_year = BCD2BIN(rs5c->regs[RS5C372_REG_YEAR]) + 100; dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " "mday=%d, mon=%d, year=%d, wday=%d\n", @@ -83,22 +179,25 @@ static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm) tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - return 0; + /* rtc might need initialization */ + return rtc_valid_tm(tm); } static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm) { - unsigned char buf[8] = { RS5C372_REG_BASE }; + struct rs5c372 *rs5c = i2c_get_clientdata(client); + unsigned char buf[8]; - dev_dbg(&client->dev, - "%s: secs=%d, mins=%d, hours=%d ", + dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d " "mday=%d, mon=%d, year=%d, wday=%d\n", - __FUNCTION__, tm->tm_sec, tm->tm_min, tm->tm_hour, + __FUNCTION__, + tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); + buf[0] = RS5C_ADDR(RS5C372_REG_SECS); buf[1] = BIN2BCD(tm->tm_sec); buf[2] = BIN2BCD(tm->tm_min); - buf[3] = BIN2BCD(tm->tm_hour); + buf[3] = rs5c_hr2reg(rs5c, tm->tm_hour); buf[4] = BIN2BCD(tm->tm_wday); buf[5] = BIN2BCD(tm->tm_mday); buf[6] = BIN2BCD(tm->tm_mon + 1); @@ -112,30 +211,43 @@ static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm) return 0; } -static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim) -{ - unsigned char buf = RS5C372_REG_TRIM; - - struct i2c_msg msgs[] = { - { client->addr, 0, 1, &buf }, - { client->addr, I2C_M_RD, 1, &buf }, - }; +#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE) +#define NEED_TRIM +#endif - if ((i2c_transfer(client->adapter, msgs, 2)) != 2) { - dev_err(&client->dev, "%s: read error\n", __FUNCTION__); - return -EIO; - } +#if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE) +#define NEED_TRIM +#endif - dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, trim); +#ifdef NEED_TRIM +static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim) +{ + struct rs5c372 *rs5c372 = i2c_get_clientdata(client); + u8 tmp = rs5c372->regs[RS5C372_REG_TRIM]; if (osc) - *osc = (buf & RS5C372_TRIM_XSL) ? 32000 : 32768; - - if (trim) - *trim = buf & RS5C372_TRIM_MASK; + *osc = (tmp & RS5C372_TRIM_XSL) ? 32000 : 32768; + + if (trim) { + dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, tmp); + tmp &= RS5C372_TRIM_MASK; + if (tmp & 0x3e) { + int t = tmp & 0x3f; + + if (tmp & 0x40) + t = (~t | (s8)0xc0) + 1; + else + t = t - 1; + + tmp = t * 2; + } else + tmp = 0; + *trim = tmp; + } return 0; } +#endif static int rs5c372_rtc_read_time(struct device *dev, struct rtc_time *tm) { @@ -147,25 +259,190 @@ static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm) return rs5c372_set_datetime(to_i2c_client(dev), tm); } +#if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE) + +static int +rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rs5c372 *rs5c = i2c_get_clientdata(client); + unsigned char buf[2]; + int status; + + buf[1] = rs5c->regs[RS5C_REG_CTRL1]; + switch (cmd) { + case RTC_UIE_OFF: + case RTC_UIE_ON: + /* some 327a modes use a different IRQ pin for 1Hz irqs */ + if (rs5c->type == rtc_rs5c372a + && (buf[1] & RS5C372A_CTRL1_SL1)) + return -ENOIOCTLCMD; + case RTC_AIE_OFF: + case RTC_AIE_ON: + /* these irq management calls only make sense for chips + * which are wired up to an IRQ. + */ + if (!rs5c->has_irq) + return -ENOIOCTLCMD; + break; + default: + return -ENOIOCTLCMD; + } + + status = rs5c_get_regs(rs5c); + if (status < 0) + return status; + + buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); + switch (cmd) { + case RTC_AIE_OFF: /* alarm off */ + buf[1] &= ~RS5C_CTRL1_AALE; + break; + case RTC_AIE_ON: /* alarm on */ + buf[1] |= RS5C_CTRL1_AALE; + break; + case RTC_UIE_OFF: /* update off */ + buf[1] &= ~RS5C_CTRL1_CT_MASK; + break; + case RTC_UIE_ON: /* update on */ + buf[1] &= ~RS5C_CTRL1_CT_MASK; + buf[1] |= RS5C_CTRL1_CT4; + break; + } + if ((i2c_master_send(client, buf, 2)) != 2) { + printk(KERN_WARNING "%s: can't update alarm\n", + rs5c->rtc->name); + status = -EIO; + } else + rs5c->regs[RS5C_REG_CTRL1] = buf[1]; + return status; +} + +#else +#define rs5c_rtc_ioctl NULL +#endif + + +/* NOTE: Since RTC_WKALM_{RD,SET} were originally defined for EFI, + * which only exposes a polled programming interface; and since + * these calls map directly to those EFI requests; we don't demand + * we have an IRQ for this chip when we go through this API. + * + * The older x86_pc derived RTC_ALM_{READ,SET} calls require irqs + * though, managed through RTC_AIE_{ON,OFF} requests. + */ + +static int rs5c_read_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rs5c372 *rs5c = i2c_get_clientdata(client); + int status; + + status = rs5c_get_regs(rs5c); + if (status < 0) + return status; + + /* report alarm time */ + t->time.tm_sec = 0; + t->time.tm_min = BCD2BIN(rs5c->regs[RS5C_REG_ALARM_A_MIN] & 0x7f); + t->time.tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C_REG_ALARM_A_HOURS]); + t->time.tm_mday = -1; + t->time.tm_mon = -1; + t->time.tm_year = -1; + t->time.tm_wday = -1; + t->time.tm_yday = -1; + t->time.tm_isdst = -1; + + /* ... and status */ + t->enabled = !!(rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE); + t->pending = !!(rs5c->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_AAFG); + + return 0; +} + +static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct i2c_client *client = to_i2c_client(dev); + struct rs5c372 *rs5c = i2c_get_clientdata(client); + int status; + unsigned char buf[4]; + + /* only handle up to 24 hours in the future, like RTC_ALM_SET */ + if (t->time.tm_mday != -1 + || t->time.tm_mon != -1 + || t->time.tm_year != -1) + return -EINVAL; + + /* REVISIT: round up tm_sec */ + + /* if needed, disable irq (clears pending status) */ + status = rs5c_get_regs(rs5c); + if (status < 0) + return status; + if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) { + buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); + buf[1] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE; + if (i2c_master_send(client, buf, 2) != 2) { + pr_debug("%s: can't disable alarm\n", rs5c->rtc->name); + return -EIO; + } + rs5c->regs[RS5C_REG_CTRL1] = buf[1]; + } + + /* set alarm */ + buf[0] = RS5C_ADDR(RS5C_REG_ALARM_A_MIN); + buf[1] = BIN2BCD(t->time.tm_min); + buf[2] = rs5c_hr2reg(rs5c, t->time.tm_hour); + buf[3] = 0x7f; /* any/all days */ + if ((i2c_master_send(client, buf, 4)) != 4) { + pr_debug("%s: can't set alarm time\n", rs5c->rtc->name); + return -EIO; + } + + /* ... and maybe enable its irq */ + if (t->enabled) { + buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); + buf[1] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE; + if ((i2c_master_send(client, buf, 2)) != 2) + printk(KERN_WARNING "%s: can't enable alarm\n", + rs5c->rtc->name); + rs5c->regs[RS5C_REG_CTRL1] = buf[1]; + } + + return 0; +} + +#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE) + static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq) { int err, osc, trim; err = rs5c372_get_trim(to_i2c_client(dev), &osc, &trim); if (err == 0) { - seq_printf(seq, "%d.%03d KHz\n", osc / 1000, osc % 1000); - seq_printf(seq, "trim\t: %d\n", trim); + seq_printf(seq, "crystal\t\t: %d.%03d KHz\n", + osc / 1000, osc % 1000); + seq_printf(seq, "trim\t\t: %d\n", trim); } return 0; } -static struct rtc_class_ops rs5c372_rtc_ops = { +#else +#define rs5c372_rtc_proc NULL +#endif + +static const struct rtc_class_ops rs5c372_rtc_ops = { .proc = rs5c372_rtc_proc, + .ioctl = rs5c_rtc_ioctl, .read_time = rs5c372_rtc_read_time, .set_time = rs5c372_rtc_set_time, + .read_alarm = rs5c_read_alarm, + .set_alarm = rs5c_set_alarm, }; +#if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE) + static ssize_t rs5c372_sysfs_show_trim(struct device *dev, struct device_attribute *attr, char *buf) { @@ -175,7 +452,7 @@ static ssize_t rs5c372_sysfs_show_trim(struct device *dev, if (err) return err; - return sprintf(buf, "0x%2x\n", trim); + return sprintf(buf, "%d\n", trim); } static DEVICE_ATTR(trim, S_IRUGO, rs5c372_sysfs_show_trim, NULL); @@ -192,29 +469,57 @@ static ssize_t rs5c372_sysfs_show_osc(struct device *dev, } static DEVICE_ATTR(osc, S_IRUGO, rs5c372_sysfs_show_osc, NULL); -static int rs5c372_attach(struct i2c_adapter *adapter) +static int rs5c_sysfs_register(struct device *dev) { - return i2c_probe(adapter, &addr_data, rs5c372_probe); + int err; + + err = device_create_file(dev, &dev_attr_trim); + if (err) + return err; + err = device_create_file(dev, &dev_attr_osc); + if (err) + device_remove_file(dev, &dev_attr_trim); + + return err; } +#else +static int rs5c_sysfs_register(struct device *dev) +{ + return 0; +} +#endif /* SYSFS */ + +static struct i2c_driver rs5c372_driver; + static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind) { int err = 0; struct i2c_client *client; - struct rtc_device *rtc; + struct rs5c372 *rs5c372; + struct rtc_time tm; - dev_dbg(&adapter->dev, "%s\n", __FUNCTION__); + dev_dbg(adapter->class_dev.dev, "%s\n", __FUNCTION__); if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) { err = -ENODEV; goto exit; } - if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) { + if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) { err = -ENOMEM; goto exit; } + /* we read registers 0x0f then 0x00-0x0f; skip the first one */ + rs5c372->regs=&rs5c372->buf[1]; + + /* On conversion to a "new style" i2c driver, we'll be handed + * the i2c_client (we won't create it) + */ + client = &rs5c372->dev; + rs5c372->client = client; + /* I2C client */ client->addr = address; client->driver = &rs5c372_driver; @@ -222,53 +527,159 @@ static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind) strlcpy(client->name, rs5c372_driver.driver.name, I2C_NAME_SIZE); + i2c_set_clientdata(client, rs5c372); + /* Inform the i2c layer */ if ((err = i2c_attach_client(client))) goto exit_kfree; - dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); + err = rs5c_get_regs(rs5c372); + if (err < 0) + goto exit_detach; - rtc = rtc_device_register(rs5c372_driver.driver.name, &client->dev, - &rs5c372_rtc_ops, THIS_MODULE); + /* For "new style" drivers, irq is in i2c_client and chip type + * info comes from i2c_client.dev.platform_data. Meanwhile: + * + * STICK BOARD-SPECIFIC SETUP CODE RIGHT HERE + */ + if (rs5c372->type == rtc_undef) { + rs5c372->type = rtc_rs5c372b; + dev_warn(&client->dev, "assuming rs5c372b\n"); + } - if (IS_ERR(rtc)) { - err = PTR_ERR(rtc); + /* clock may be set for am/pm or 24 hr time */ + switch (rs5c372->type) { + case rtc_rs5c372a: + case rtc_rs5c372b: + /* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b. + * so does periodic irq, except some 327a modes. + */ + if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24) + rs5c372->time24 = 1; + break; + case rtc_rv5c386: + case rtc_rv5c387a: + if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24) + rs5c372->time24 = 1; + /* alarm uses ALARM_W; and nINTRB for alarm and periodic + * irq, on both 386 and 387 + */ + break; + default: + dev_err(&client->dev, "unknown RTC type\n"); goto exit_detach; } - i2c_set_clientdata(client, rtc); + /* if the oscillator lost power and no other software (like + * the bootloader) set it up, do it here. + */ + if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP) { + unsigned char buf[3]; + + rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP; + + buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); + buf[1] = rs5c372->regs[RS5C_REG_CTRL1]; + buf[2] = rs5c372->regs[RS5C_REG_CTRL2]; + + /* use 24hr mode */ + switch (rs5c372->type) { + case rtc_rs5c372a: + case rtc_rs5c372b: + buf[2] |= RS5C372_CTRL2_24; + rs5c372->time24 = 1; + break; + case rtc_rv5c386: + case rtc_rv5c387a: + buf[1] |= RV5C387_CTRL1_24; + rs5c372->time24 = 1; + break; + default: + /* impossible */ + break; + } + + if ((i2c_master_send(client, buf, 3)) != 3) { + dev_err(&client->dev, "setup error\n"); + goto exit_detach; + } + rs5c372->regs[RS5C_REG_CTRL1] = buf[1]; + rs5c372->regs[RS5C_REG_CTRL2] = buf[2]; + } + + if (rs5c372_get_datetime(client, &tm) < 0) + dev_warn(&client->dev, "clock needs to be set\n"); + + dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n", + ({ char *s; switch (rs5c372->type) { + case rtc_rs5c372a: s = "rs5c372a"; break; + case rtc_rs5c372b: s = "rs5c372b"; break; + case rtc_rv5c386: s = "rv5c386"; break; + case rtc_rv5c387a: s = "rv5c387a"; break; + default: s = "chip"; break; + }; s;}), + rs5c372->time24 ? "24hr" : "am/pm" + ); + + /* FIXME when client->irq exists, use it to register alarm irq */ + + rs5c372->rtc = rtc_device_register(rs5c372_driver.driver.name, + &client->dev, &rs5c372_rtc_ops, THIS_MODULE); - device_create_file(&client->dev, &dev_attr_trim); - device_create_file(&client->dev, &dev_attr_osc); + if (IS_ERR(rs5c372->rtc)) { + err = PTR_ERR(rs5c372->rtc); + goto exit_detach; + } + + err = rs5c_sysfs_register(&client->dev); + if (err) + goto exit_devreg; return 0; +exit_devreg: + rtc_device_unregister(rs5c372->rtc); + exit_detach: i2c_detach_client(client); exit_kfree: - kfree(client); + kfree(rs5c372); exit: return err; } +static int rs5c372_attach(struct i2c_adapter *adapter) +{ + return i2c_probe(adapter, &addr_data, rs5c372_probe); +} + static int rs5c372_detach(struct i2c_client *client) { int err; - struct rtc_device *rtc = i2c_get_clientdata(client); + struct rs5c372 *rs5c372 = i2c_get_clientdata(client); - if (rtc) - rtc_device_unregister(rtc); + if (rs5c372->rtc) + rtc_device_unregister(rs5c372->rtc); + + /* REVISIT properly destroy the sysfs files ... */ if ((err = i2c_detach_client(client))) return err; - kfree(client); - + kfree(rs5c372); return 0; } +static struct i2c_driver rs5c372_driver = { + .driver = { + .name = "rtc-rs5c372", + }, + .attach_adapter = &rs5c372_attach, + .detach_client = &rs5c372_detach, +}; + static __init int rs5c372_init(void) { return i2c_add_driver(&rs5c372_driver);