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-rw-r--r--drivers/rtc/Kconfig14
-rw-r--r--drivers/rtc/Makefile3
-rw-r--r--drivers/rtc/rtc-at91rm9200.c (renamed from drivers/rtc/rtc-at91.c)7
-rw-r--r--drivers/rtc/rtc-dev.c9
-rw-r--r--drivers/rtc/rtc-ds1672.c11
-rw-r--r--drivers/rtc/rtc-ds1742.c67
-rw-r--r--drivers/rtc/rtc-lib.c81
-rw-r--r--drivers/rtc/rtc-omap.c571
-rw-r--r--drivers/rtc/rtc-pcf8563.c6
-rw-r--r--drivers/rtc/rtc-proc.c4
-rw-r--r--drivers/rtc/rtc-rs5c372.c565
-rw-r--r--drivers/rtc/rtc-s3c.c6
-rw-r--r--drivers/rtc/rtc-sa1100.c4
-rw-r--r--drivers/rtc/rtc-sh.c249
-rw-r--r--drivers/rtc/rtc-sysfs.c2
-rw-r--r--drivers/rtc/rtc-test.c9
-rw-r--r--drivers/rtc/rtc-x1205.c22
17 files changed, 1455 insertions, 175 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index fc766a7a611e..09660e2ab051 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -154,15 +154,23 @@ config RTC_DRV_DS1672
will be called rtc-ds1672.
config RTC_DRV_DS1742
- tristate "Dallas DS1742"
+ tristate "Dallas DS1742/1743"
depends on RTC_CLASS
help
If you say yes here you get support for the
- Dallas DS1742 timekeeping chip.
+ Dallas DS1742/1743 timekeeping chip.
This driver can also be built as a module. If so, the module
will be called rtc-ds1742.
+config RTC_DRV_OMAP
+ tristate "TI OMAP1"
+ depends on RTC_CLASS && ( \
+ ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 )
+ help
+ Say "yes" here to support the real time clock on TI OMAP1 chips.
+ This driver can also be built as a module called rtc-omap.
+
config RTC_DRV_PCF8563
tristate "Philips PCF8563/Epson RTC8564"
depends on RTC_CLASS && I2C
@@ -280,7 +288,7 @@ config RTC_DRV_PL031
To compile this driver as a module, choose M here: the
module will be called rtc-pl031.
-config RTC_DRV_AT91
+config RTC_DRV_AT91RM9200
tristate "AT91RM9200"
depends on RTC_CLASS && ARCH_AT91RM9200
help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 3ba5ff6e6800..e6beedacc966 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o
obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o
+obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o
obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
@@ -34,5 +35,5 @@ obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
-obj-$(CONFIG_RTC_DRV_AT91) += rtc-at91.o
+obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o
diff --git a/drivers/rtc/rtc-at91.c b/drivers/rtc/rtc-at91rm9200.c
index 5c8addcaf1fb..a724ab49a797 100644
--- a/drivers/rtc/rtc-at91.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -33,6 +33,8 @@
#include <asm/mach/time.h>
+#include <asm/arch/at91_rtc.h>
+
#define AT91_RTC_FREQ 1
#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
@@ -137,6 +139,9 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
tm->tm_year = at91_alarm_year - 1900;
+ alrm->enabled = (at91_sys_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
+ ? 1 : 0;
+
pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__,
1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
@@ -223,8 +228,6 @@ static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
{
unsigned long imr = at91_sys_read(AT91_RTC_IMR);
- seq_printf(seq, "alarm_IRQ\t: %s\n",
- (imr & AT91_RTC_ALARM) ? "yes" : "no");
seq_printf(seq, "update_IRQ\t: %s\n",
(imr & AT91_RTC_ACKUPD) ? "yes" : "no");
seq_printf(seq, "periodic_IRQ\t: %s\n",
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 814b9e1873f5..94d3df62a5fa 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -53,9 +53,10 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
* Routine to poll RTC seconds field for change as often as possible,
* after first RTC_UIE use timer to reduce polling
*/
-static void rtc_uie_task(void *data)
+static void rtc_uie_task(struct work_struct *work)
{
- struct rtc_device *rtc = data;
+ struct rtc_device *rtc =
+ container_of(work, struct rtc_device, uie_task);
struct rtc_time tm;
int num = 0;
int err;
@@ -411,7 +412,7 @@ static int rtc_dev_add_device(struct class_device *class_dev,
spin_lock_init(&rtc->irq_lock);
init_waitqueue_head(&rtc->irq_queue);
#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
- INIT_WORK(&rtc->uie_task, rtc_uie_task, rtc);
+ INIT_WORK(&rtc->uie_task, rtc_uie_task);
setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc);
#endif
@@ -434,7 +435,7 @@ static int rtc_dev_add_device(struct class_device *class_dev,
goto err_cdev_del;
}
- dev_info(class_dev->dev, "rtc intf: dev (%d:%d)\n",
+ dev_dbg(class_dev->dev, "rtc intf: dev (%d:%d)\n",
MAJOR(rtc->rtc_dev->devt),
MINOR(rtc->rtc_dev->devt));
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
index 67e816a9a39f..205fa28593b7 100644
--- a/drivers/rtc/rtc-ds1672.c
+++ b/drivers/rtc/rtc-ds1672.c
@@ -199,7 +199,7 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
struct i2c_client *client;
struct rtc_device *rtc;
- 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;
@@ -237,17 +237,22 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
/* read control register */
err = ds1672_get_control(client, &control);
if (err)
- goto exit_detach;
+ goto exit_devreg;
if (control & DS1672_REG_CONTROL_EOSC)
dev_warn(&client->dev, "Oscillator not enabled. "
"Set time to enable.\n");
/* Register sysfs hooks */
- device_create_file(&client->dev, &dev_attr_control);
+ err = device_create_file(&client->dev, &dev_attr_control);
+ if (err)
+ goto exit_devreg;
return 0;
+exit_devreg:
+ rtc_device_unregister(rtc);
+
exit_detach:
i2c_detach_client(client);
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 6273a3d240a2..17633bfa8480 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -6,6 +6,10 @@
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
+ *
+ * Copyright (C) 2006 Torsten Ertbjerg Rasmussen <tr@newtec.dk>
+ * - nvram size determined from resource
+ * - this ds1742 driver now supports ds1743.
*/
#include <linux/bcd.h>
@@ -17,20 +21,19 @@
#include <linux/platform_device.h>
#include <linux/io.h>
-#define DRV_VERSION "0.2"
+#define DRV_VERSION "0.3"
-#define RTC_REG_SIZE 0x800
-#define RTC_OFFSET 0x7f8
+#define RTC_SIZE 8
-#define RTC_CONTROL (RTC_OFFSET + 0)
-#define RTC_CENTURY (RTC_OFFSET + 0)
-#define RTC_SECONDS (RTC_OFFSET + 1)
-#define RTC_MINUTES (RTC_OFFSET + 2)
-#define RTC_HOURS (RTC_OFFSET + 3)
-#define RTC_DAY (RTC_OFFSET + 4)
-#define RTC_DATE (RTC_OFFSET + 5)
-#define RTC_MONTH (RTC_OFFSET + 6)
-#define RTC_YEAR (RTC_OFFSET + 7)
+#define RTC_CONTROL 0
+#define RTC_CENTURY 0
+#define RTC_SECONDS 1
+#define RTC_MINUTES 2
+#define RTC_HOURS 3
+#define RTC_DAY 4
+#define RTC_DATE 5
+#define RTC_MONTH 6
+#define RTC_YEAR 7
#define RTC_CENTURY_MASK 0x3f
#define RTC_SECONDS_MASK 0x7f
@@ -48,7 +51,10 @@
struct rtc_plat_data {
struct rtc_device *rtc;
- void __iomem *ioaddr;
+ void __iomem *ioaddr_nvram;
+ void __iomem *ioaddr_rtc;
+ size_t size_nvram;
+ size_t size;
unsigned long baseaddr;
unsigned long last_jiffies;
};
@@ -57,7 +63,7 @@ static int ds1742_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- void __iomem *ioaddr = pdata->ioaddr;
+ void __iomem *ioaddr = pdata->ioaddr_rtc;
u8 century;
century = BIN2BCD((tm->tm_year + 1900) / 100);
@@ -82,7 +88,7 @@ static int ds1742_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- void __iomem *ioaddr = pdata->ioaddr;
+ void __iomem *ioaddr = pdata->ioaddr_rtc;
unsigned int year, month, day, hour, minute, second, week;
unsigned int century;
@@ -127,10 +133,10 @@ static ssize_t ds1742_nvram_read(struct kobject *kobj, char *buf,
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- void __iomem *ioaddr = pdata->ioaddr;
+ void __iomem *ioaddr = pdata->ioaddr_nvram;
ssize_t count;
- for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--)
+ for (count = 0; size > 0 && pos < pdata->size_nvram; count++, size--)
*buf++ = readb(ioaddr + pos++);
return count;
}
@@ -141,10 +147,10 @@ static ssize_t ds1742_nvram_write(struct kobject *kobj, char *buf,
struct platform_device *pdev =
to_platform_device(container_of(kobj, struct device, kobj));
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- void __iomem *ioaddr = pdata->ioaddr;
+ void __iomem *ioaddr = pdata->ioaddr_nvram;
ssize_t count;
- for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--)
+ for (count = 0; size > 0 && pos < pdata->size_nvram; count++, size--)
writeb(*buf++, ioaddr + pos++);
return count;
}
@@ -155,7 +161,6 @@ static struct bin_attribute ds1742_nvram_attr = {
.mode = S_IRUGO | S_IWUGO,
.owner = THIS_MODULE,
},
- .size = RTC_OFFSET,
.read = ds1742_nvram_read,
.write = ds1742_nvram_write,
};
@@ -175,19 +180,23 @@ static int __init ds1742_rtc_probe(struct platform_device *pdev)
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
- if (!request_mem_region(res->start, RTC_REG_SIZE, pdev->name)) {
+ pdata->size = res->end - res->start + 1;
+ if (!request_mem_region(res->start, pdata->size, pdev->name)) {
ret = -EBUSY;
goto out;
}
pdata->baseaddr = res->start;
- ioaddr = ioremap(pdata->baseaddr, RTC_REG_SIZE);
+ ioaddr = ioremap(pdata->baseaddr, pdata->size);
if (!ioaddr) {
ret = -ENOMEM;
goto out;
}
- pdata->ioaddr = ioaddr;
+ pdata->ioaddr_nvram = ioaddr;
+ pdata->size_nvram = pdata->size - RTC_SIZE;
+ pdata->ioaddr_rtc = ioaddr + pdata->size_nvram;
/* turn RTC on if it was not on */
+ ioaddr = pdata->ioaddr_rtc;
sec = readb(ioaddr + RTC_SECONDS);
if (sec & RTC_STOP) {
sec &= RTC_SECONDS_MASK;
@@ -208,6 +217,8 @@ static int __init ds1742_rtc_probe(struct platform_device *pdev)
pdata->rtc = rtc;
pdata->last_jiffies = jiffies;
platform_set_drvdata(pdev, pdata);
+ ds1742_nvram_attr.size = max(ds1742_nvram_attr.size,
+ pdata->size_nvram);
ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr);
if (ret)
goto out;
@@ -215,10 +226,10 @@ static int __init ds1742_rtc_probe(struct platform_device *pdev)
out:
if (pdata->rtc)
rtc_device_unregister(pdata->rtc);
- if (ioaddr)
- iounmap(ioaddr);
+ if (pdata->ioaddr_nvram)
+ iounmap(pdata->ioaddr_nvram);
if (pdata->baseaddr)
- release_mem_region(pdata->baseaddr, RTC_REG_SIZE);
+ release_mem_region(pdata->baseaddr, pdata->size);
kfree(pdata);
return ret;
}
@@ -229,8 +240,8 @@ static int __devexit ds1742_rtc_remove(struct platform_device *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr);
rtc_device_unregister(pdata->rtc);
- iounmap(pdata->ioaddr);
- release_mem_region(pdata->baseaddr, RTC_REG_SIZE);
+ iounmap(pdata->ioaddr_nvram);
+ release_mem_region(pdata->baseaddr, pdata->size);
kfree(pdata);
return 0;
}
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c
index ba795a4db1e9..7bbc26a34bd2 100644
--- a/drivers/rtc/rtc-lib.c
+++ b/drivers/rtc/rtc-lib.c
@@ -117,4 +117,85 @@ int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
}
EXPORT_SYMBOL(rtc_tm_to_time);
+
+/* Merge the valid (i.e. non-negative) fields of alarm into the current
+ * time. If the valid alarm fields are earlier than the equivalent
+ * fields in the time, carry one into the least significant invalid
+ * field, so that the alarm expiry is in the future. It assumes that the
+ * least significant invalid field is more significant than the most
+ * significant valid field, and that the seconds field is valid.
+ *
+ * This is used by alarms that take relative (rather than absolute)
+ * times, and/or have a simple binary second counter instead of
+ * day/hour/minute/sec registers.
+ */
+void rtc_merge_alarm(struct rtc_time *now, struct rtc_time *alarm)
+{
+ int *alarmp = &alarm->tm_sec;
+ int *timep = &now->tm_sec;
+ int carry_into, i;
+
+ /* Ignore everything past the 6th element (tm_year). */
+ for (i = 5; i > 0; i--) {
+ if (alarmp[i] < 0)
+ alarmp[i] = timep[i];
+ else
+ break;
+ }
+
+ /* No carry needed if all fields are valid. */
+ if (i == 5)
+ return;
+
+ for (carry_into = i + 1; i >= 0; i--) {
+ if (alarmp[i] < timep[i])
+ break;
+
+ if (alarmp[i] > timep[i])
+ return;
+ }
+
+ switch (carry_into) {
+ case 1:
+ alarm->tm_min++;
+
+ if (alarm->tm_min < 60)
+ return;
+
+ alarm->tm_min = 0;
+ /* fall-through */
+
+ case 2:
+ alarm->tm_hour++;
+
+ if (alarm->tm_hour < 60)
+ return;
+
+ alarm->tm_hour = 0;
+ /* fall-through */
+
+ case 3:
+ alarm->tm_mday++;
+
+ if (alarm->tm_mday <= rtc_days_in_month[alarm->tm_mon])
+ return;
+
+ alarm->tm_mday = 1;
+ /* fall-through */
+
+ case 4:
+ alarm->tm_mon++;
+
+ if (alarm->tm_mon <= 12)
+ return;
+
+ alarm->tm_mon = 1;
+ /* fall-through */
+
+ case 5:
+ alarm->tm_year++;
+ }
+}
+EXPORT_SYMBOL(rtc_merge_alarm);
+
MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
new file mode 100644
index 000000000000..d59880d44fba
--- /dev/null
+++ b/drivers/rtc/rtc-omap.c
@@ -0,0 +1,571 @@
+/*
+ * TI OMAP1 Real Time Clock interface for Linux
+ *
+ * Copyright (C) 2003 MontaVista Software, Inc.
+ * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
+ *
+ * Copyright (C) 2006 David Brownell (new RTC framework)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+#include <asm/mach/time.h>
+
+
+/* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock
+ * with century-range alarm matching, driven by the 32kHz clock.
+ *
+ * The main user-visible ways it differs from PC RTCs are by omitting
+ * "don't care" alarm fields and sub-second periodic IRQs, and having
+ * an autoadjust mechanism to calibrate to the true oscillator rate.
+ *
+ * Board-specific wiring options include using split power mode with
+ * RTC_OFF_NOFF used as the reset signal (so the RTC won't be reset),
+ * and wiring RTC_WAKE_INT (so the RTC alarm can wake the system from
+ * low power modes). See the BOARD-SPECIFIC CUSTOMIZATION comment.
+ */
+
+#define OMAP_RTC_BASE 0xfffb4800
+
+/* RTC registers */
+#define OMAP_RTC_SECONDS_REG 0x00
+#define OMAP_RTC_MINUTES_REG 0x04
+#define OMAP_RTC_HOURS_REG 0x08
+#define OMAP_RTC_DAYS_REG 0x0C
+#define OMAP_RTC_MONTHS_REG 0x10
+#define OMAP_RTC_YEARS_REG 0x14
+#define OMAP_RTC_WEEKS_REG 0x18
+
+#define OMAP_RTC_ALARM_SECONDS_REG 0x20
+#define OMAP_RTC_ALARM_MINUTES_REG 0x24
+#define OMAP_RTC_ALARM_HOURS_REG 0x28
+#define OMAP_RTC_ALARM_DAYS_REG 0x2c
+#define OMAP_RTC_ALARM_MONTHS_REG 0x30
+#define OMAP_RTC_ALARM_YEARS_REG 0x34
+
+#define OMAP_RTC_CTRL_REG 0x40
+#define OMAP_RTC_STATUS_REG 0x44
+#define OMAP_RTC_INTERRUPTS_REG 0x48
+
+#define OMAP_RTC_COMP_LSB_REG 0x4c
+#define OMAP_RTC_COMP_MSB_REG 0x50
+#define OMAP_RTC_OSC_REG 0x54
+
+/* OMAP_RTC_CTRL_REG bit fields: */
+#define OMAP_RTC_CTRL_SPLIT (1<<7)
+#define OMAP_RTC_CTRL_DISABLE (1<<6)
+#define OMAP_RTC_CTRL_SET_32_COUNTER (1<<5)
+#define OMAP_RTC_CTRL_TEST (1<<4)
+#define OMAP_RTC_CTRL_MODE_12_24 (1<<3)
+#define OMAP_RTC_CTRL_AUTO_COMP (1<<2)
+#define OMAP_RTC_CTRL_ROUND_30S (1<<1)
+#define OMAP_RTC_CTRL_STOP (1<<0)
+
+/* OMAP_RTC_STATUS_REG bit fields: */
+#define OMAP_RTC_STATUS_POWER_UP (1<<7)
+#define OMAP_RTC_STATUS_ALARM (1<<6)
+#define OMAP_RTC_STATUS_1D_EVENT (1<<5)
+#define OMAP_RTC_STATUS_1H_EVENT (1<<4)
+#define OMAP_RTC_STATUS_1M_EVENT (1<<3)
+#define OMAP_RTC_STATUS_1S_EVENT (1<<2)
+#define OMAP_RTC_STATUS_RUN (1<<1)
+#define OMAP_RTC_STATUS_BUSY (1<<0)
+
+/* OMAP_RTC_INTERRUPTS_REG bit fields: */
+#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3)
+#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2)
+
+
+#define rtc_read(addr) omap_readb(OMAP_RTC_BASE + (addr))
+#define rtc_write(val, addr) omap_writeb(val, OMAP_RTC_BASE + (addr))
+
+
+/* platform_bus isn't hotpluggable, so for static linkage it'd be safe
+ * to get rid of probe() and remove() code ... too bad the driver struct
+ * remembers probe(), that's about 25% of the runtime footprint!!
+ */
+#ifndef MODULE
+#undef __devexit
+#undef __devexit_p
+#define __devexit __exit
+#define __devexit_p __exit_p
+#endif
+
+
+/* we rely on the rtc framework to handle locking (rtc->ops_lock),
+ * so the only other requirement is that register accesses which
+ * require BUSY to be clear are made with IRQs locally disabled
+ */
+static void rtc_wait_not_busy(void)
+{
+ int count = 0;
+ u8 status;
+
+ /* BUSY may stay active for 1/32768 second (~30 usec) */
+ for (count = 0; count < 50; count++) {
+ status = rtc_read(OMAP_RTC_STATUS_REG);
+ if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
+ break;
+ udelay(1);
+ }
+ /* now we have ~15 usec to read/write various registers */
+}
+
+static irqreturn_t rtc_irq(int irq, void *class_dev)
+{
+ unsigned long events = 0;
+ u8 irq_data;
+
+ irq_data = rtc_read(OMAP_RTC_STATUS_REG);
+
+ /* alarm irq? */
+ if (irq_data & OMAP_RTC_STATUS_ALARM) {
+ rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+ events |= RTC_IRQF | RTC_AF;
+ }
+
+ /* 1/sec periodic/update irq? */
+ if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
+ events |= RTC_IRQF | RTC_UF;
+
+ rtc_update_irq(class_dev, 1, events);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_RTC_INTF_DEV
+
+static int
+omap_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ u8 reg;
+
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ case RTC_AIE_ON:
+ case RTC_UIE_OFF:
+ case RTC_UIE_ON:
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ local_irq_disable();
+ rtc_wait_not_busy();
+ reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+ switch (cmd) {
+ /* AIE = Alarm Interrupt Enable */
+ case RTC_AIE_OFF:
+ reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
+ break;
+ case RTC_AIE_ON:
+ reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
+ break;
+ /* UIE = Update Interrupt Enable (1/second) */
+ case RTC_UIE_OFF:
+ reg &= ~OMAP_RTC_INTERRUPTS_IT_TIMER;
+ break;
+ case RTC_UIE_ON:
+ reg |= OMAP_RTC_INTERRUPTS_IT_TIMER;
+ break;
+ }
+ rtc_wait_not_busy();
+ rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
+ local_irq_enable();
+
+ return 0;
+}
+
+#else
+#define omap_rtc_ioctl NULL
+#endif
+
+/* this hardware doesn't support "don't care" alarm fields */
+static int tm2bcd(struct rtc_time *tm)
+{
+ if (rtc_valid_tm(tm) != 0)
+ return -EINVAL;
+
+ tm->tm_sec = BIN2BCD(tm->tm_sec);
+ tm->tm_min = BIN2BCD(tm->tm_min);
+ tm->tm_hour = BIN2BCD(tm->tm_hour);
+ tm->tm_mday = BIN2BCD(tm->tm_mday);
+
+ tm->tm_mon = BIN2BCD(tm->tm_mon + 1);
+
+ /* epoch == 1900 */
+ if (tm->tm_year < 100 || tm->tm_year > 199)
+ return -EINVAL;
+ tm->tm_year = BIN2BCD(tm->tm_year - 100);
+
+ return 0;
+}
+
+static void bcd2tm(struct rtc_time *tm)
+{
+ tm->tm_sec = BCD2BIN(tm->tm_sec);
+ tm->tm_min = BCD2BIN(tm->tm_min);
+ tm->tm_hour = BCD2BIN(tm->tm_hour);
+ tm->tm_mday = BCD2BIN(tm->tm_mday);
+ tm->tm_mon = BCD2BIN(tm->tm_mon) - 1;
+ /* epoch == 1900 */
+ tm->tm_year = BCD2BIN(tm->tm_year) + 100;
+}
+
+
+static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ /* we don't report wday/yday/isdst ... */
+ local_irq_disable();
+ rtc_wait_not_busy();
+
+ tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
+ tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
+ tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
+ tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
+ tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
+ tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
+
+ local_irq_enable();
+
+ bcd2tm(tm);
+ return 0;
+}
+
+static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ if (tm2bcd(tm) < 0)
+ return -EINVAL;
+ local_irq_disable();
+ rtc_wait_not_busy();
+
+ rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
+ rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
+ rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
+ rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
+ rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
+ rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
+
+ local_irq_enable();
+
+ return 0;
+}
+
+static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ local_irq_disable();
+ rtc_wait_not_busy();
+
+ alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
+ alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
+ alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
+ alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
+ alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
+ alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
+
+ local_irq_enable();
+
+ bcd2tm(&alm->time);
+ alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
+ & OMAP_RTC_INTERRUPTS_IT_ALARM);
+
+ return 0;
+}
+
+static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ u8 reg;
+
+ /* Much userspace code uses RTC_ALM_SET, thus "don't care" for
+ * day/month/year specifies alarms up to 24 hours in the future.
+ * So we need to handle that ... but let's ignore the "don't care"
+ * values for hours/minutes/seconds.
+ */
+ if (alm->time.tm_mday <= 0
+ && alm->time.tm_mon < 0
+ && alm->time.tm_year < 0) {
+ struct rtc_time tm;
+ unsigned long now, then;
+
+ omap_rtc_read_time(dev, &tm);
+ rtc_tm_to_time(&tm, &now);
+
+ alm->time.tm_mday = tm.tm_mday;
+ alm->time.tm_mon = tm.tm_mon;
+ alm->time.tm_year = tm.tm_year;
+ rtc_tm_to_time(&alm->time, &then);
+
+ /* sometimes the alarm wraps into tomorrow */
+ if (then < now) {
+ rtc_time_to_tm(now + 24 * 60 * 60, &tm);
+ alm->time.tm_mday = tm.tm_mday;
+ alm->time.tm_mon = tm.tm_mon;
+ alm->time.tm_year = tm.tm_year;
+ }
+ }
+
+ if (tm2bcd(&alm->time) < 0)
+ return -EINVAL;
+
+ local_irq_disable();
+ rtc_wait_not_busy();
+
+ rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
+ rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
+ rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
+ rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
+ rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
+ rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
+
+ reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+ if (alm->enabled)
+ reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
+ else
+ reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
+ rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
+
+ local_irq_enable();
+
+ return 0;
+}
+
+static struct rtc_class_ops omap_rtc_ops = {
+ .ioctl = omap_rtc_ioctl,
+ .read_time = omap_rtc_read_time,
+ .set_time = omap_rtc_set_time,
+ .read_alarm = omap_rtc_read_alarm,
+ .set_alarm = omap_rtc_set_alarm,
+};
+
+static int omap_rtc_alarm;
+static int omap_rtc_timer;
+
+static int __devinit omap_rtc_probe(struct platform_device *pdev)
+{
+ struct resource *res, *mem;
+ struct rtc_device *rtc;
+ u8 reg, new_ctrl;
+
+ omap_rtc_timer = platform_get_irq(pdev, 0);
+ if (omap_rtc_timer <= 0) {
+ pr_debug("%s: no update irq?\n", pdev->name);
+ return -ENOENT;
+ }
+
+ omap_rtc_alarm = platform_get_irq(pdev, 1);
+ if (omap_rtc_alarm <= 0) {
+ pr_debug("%s: no alarm irq?\n", pdev->name);
+ return -ENOENT;
+ }
+
+ /* NOTE: using static mapping for RTC registers */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res && res->start != OMAP_RTC_BASE) {
+ pr_debug("%s: RTC registers at %08x, expected %08x\n",
+ pdev->name, (unsigned) res->start, OMAP_RTC_BASE);
+ return -ENOENT;
+ }
+
+ if (res)
+ mem = request_mem_region(res->start,
+ res->end - res->start + 1,
+ pdev->name);
+ else
+ mem = NULL;
+ if (!mem) {
+ pr_debug("%s: RTC registers at %08x are not free\n",
+ pdev->name, OMAP_RTC_BASE);
+ return -EBUSY;
+ }
+
+ rtc = rtc_device_register(pdev->name, &pdev->dev,
+ &omap_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc)) {
+ pr_debug("%s: can't register RTC device, err %ld\n",
+ pdev->name, PTR_ERR(rtc));
+ goto fail;
+ }
+ platform_set_drvdata(pdev, rtc);
+ class_set_devdata(&rtc->class_dev, mem);
+
+ /* clear pending irqs, and set 1/second periodic,
+ * which we'll use instead of update irqs
+ */
+ rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+
+ /* clear old status */
+ reg = rtc_read(OMAP_RTC_STATUS_REG);
+ if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
+ pr_info("%s: RTC power up reset detected\n",
+ pdev->name);
+ rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
+ }
+ if (reg & (u8) OMAP_RTC_STATUS_ALARM)
+ rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+
+ /* handle periodic and alarm irqs */
+ if (request_irq(omap_rtc_timer, rtc_irq, SA_INTERRUPT,
+ rtc->class_dev.class_id, &rtc->class_dev)) {
+ pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
+ pdev->name, omap_rtc_timer);
+ goto fail0;
+ }
+ if (request_irq(omap_rtc_alarm, rtc_irq, SA_INTERRUPT,
+ rtc->class_dev.class_id, &rtc->class_dev)) {
+ pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
+ pdev->name, omap_rtc_alarm);
+ goto fail1;
+ }
+
+ /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
+ reg = rtc_read(OMAP_RTC_CTRL_REG);
+ if (reg & (u8) OMAP_RTC_CTRL_STOP)
+ pr_info("%s: already running\n", pdev->name);
+
+ /* force to 24 hour mode */
+ new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
+ new_ctrl |= OMAP_RTC_CTRL_STOP;
+
+ /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
+ *
+ * - Boards wired so that RTC_WAKE_INT does something, and muxed
+ * right (W13_1610_RTC_WAKE_INT is the default after chip reset),
+ * should initialize the device wakeup flag appropriately.
+ *
+ * - Boards wired so RTC_ON_nOFF is used as the reset signal,
+ * rather than nPWRON_RESET, should forcibly enable split
+ * power mode. (Some chip errata report that RTC_CTRL_SPLIT
+ * is write-only, and always reads as zero...)
+ */
+ device_init_wakeup(&pdev->dev, 0);
+
+ if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
+ pr_info("%s: split power mode\n", pdev->name);
+
+ if (reg != new_ctrl)
+ rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
+
+ return 0;
+
+fail1:
+ free_irq(omap_rtc_timer, NULL);
+fail0:
+ rtc_device_unregister(rtc);
+fail:
+ release_resource(mem);
+ return -EIO;
+}
+
+static int __devexit omap_rtc_remove(struct platform_device *pdev)
+{
+ struct rtc_device *rtc = platform_get_drvdata(pdev);;
+
+ device_init_wakeup(&pdev->dev, 0);
+
+ /* leave rtc running, but disable irqs */
+ rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+
+ free_irq(omap_rtc_timer, rtc);
+ free_irq(omap_rtc_alarm, rtc);
+
+ release_resource(class_get_devdata(&rtc->class_dev));
+ rtc_device_unregister(rtc);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static struct timespec rtc_delta;
+static u8 irqstat;
+
+static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct rtc_time rtc_tm;
+ struct timespec time;
+
+ time.tv_nsec = 0;
+ omap_rtc_read_time(NULL, &rtc_tm);
+ rtc_tm_to_time(&rtc_tm, &time.tv_sec);
+
+ save_time_delta(&rtc_delta, &time);
+ irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+
+ /* FIXME the RTC alarm is not currently acting as a wakeup event
+ * source, and in fact this enable() call is just saving a flag
+ * that's never used...
+ */
+ if (device_may_wakeup(&pdev->dev))
+ enable_irq_wake(omap_rtc_alarm);
+ else
+ rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+
+ return 0;
+}
+
+static int omap_rtc_resume(struct platform_device *pdev)
+{
+ struct rtc_time rtc_tm;
+ struct timespec time;
+
+ time.tv_nsec = 0;
+ omap_rtc_read_time(NULL, &rtc_tm);
+ rtc_tm_to_time(&rtc_tm, &time.tv_sec);
+
+ restore_time_delta(&rtc_delta, &time);
+ if (device_may_wakeup(&pdev->dev))
+ disable_irq_wake(omap_rtc_alarm);
+ else
+ rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
+ return 0;
+}
+
+#else
+#define omap_rtc_suspend NULL
+#define omap_rtc_resume NULL
+#endif
+
+static void omap_rtc_shutdown(struct platform_device *pdev)
+{
+ rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+}
+
+MODULE_ALIAS("omap_rtc");
+static struct platform_driver omap_rtc_driver = {
+ .probe = omap_rtc_probe,
+ .remove = __devexit_p(omap_rtc_remove),
+ .suspend = omap_rtc_suspend,
+ .resume = omap_rtc_resume,
+ .shutdown = omap_rtc_shutdown,
+ .driver = {
+ .name = "omap_rtc",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init rtc_init(void)
+{
+ return platform_driver_register(&omap_rtc_driver);
+}
+module_init(rtc_init);
+
+static void __exit rtc_exit(void)
+{
+ platform_driver_unregister(&omap_rtc_driver);
+}
+module_exit(rtc_exit);
+
+MODULE_AUTHOR("George G. Davis (and others)");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index a760cf69af90..4b72b8ef5d66 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -192,7 +192,7 @@ static int pcf8563_validate_client(struct i2c_client *client)
xfer = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (xfer != ARRAY_SIZE(msgs)) {
- dev_err(&client->adapter->dev,
+ dev_err(&client->dev,
"%s: could not read register 0x%02X\n",
__FUNCTION__, pattern[i].reg);
@@ -203,7 +203,7 @@ static int pcf8563_validate_client(struct i2c_client *client)
if (value > pattern[i].max ||
value < pattern[i].min) {
- dev_dbg(&client->adapter->dev,
+ dev_dbg(&client->dev,
"%s: pattern=%d, reg=%x, mask=0x%02x, min=%d, "
"max=%d, value=%d, raw=0x%02X\n",
__FUNCTION__, i, pattern[i].reg, pattern[i].mask,
@@ -253,7 +253,7 @@ static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
int err = 0;
- 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;
diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c
index d51d8f20e634..c272afd62173 100644
--- a/drivers/rtc/rtc-proc.c
+++ b/drivers/rtc/rtc-proc.c
@@ -65,7 +65,7 @@ static int rtc_proc_show(struct seq_file *seq, void *offset)
seq_printf(seq, "%02d\n", alrm.time.tm_mday);
else
seq_printf(seq, "**\n");
- seq_printf(seq, "alrm_wakeup\t: %s\n",
+ seq_printf(seq, "alarm_IRQ\t: %s\n",
alrm.enabled ? "yes" : "no");
seq_printf(seq, "alrm_pending\t: %s\n",
alrm.pending ? "yes" : "no");
@@ -120,7 +120,7 @@ static int rtc_proc_add_device(struct class_device *class_dev,
ent->owner = rtc->owner;
ent->data = class_dev;
- dev_info(class_dev->dev, "rtc intf: proc\n");
+ dev_dbg(class_dev->dev, "rtc intf: proc\n");
}
else
rtc_dev = NULL;
diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c
index a44fe4efa216..e7851e3739ab 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 <pmironchik@optifacio.net>
* Copyright (C) 2006 Tower Technologies
@@ -13,7 +13,7 @@
#include <linux/rtc.h>
#include <linux/bcd.h>
-#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;
+#if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
+#define NEED_TRIM
+#endif
- struct i2c_msg msgs[] = {
- { client->addr, 0, 1, &buf },
- { client->addr, I2C_M_RD, 1, &buf },
- };
+#if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE)
+#define NEED_TRIM
+#endif
- if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
- dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
- return -EIO;
- }
+#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;
+ *osc = (tmp & RS5C372_TRIM_XSL) ? 32000 : 32768;
if (trim) {
- *trim = buf & RS5C372_TRIM_MASK;
- dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, *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;
}
+#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");
- device_create_file(&client->dev, &dev_attr_trim);
- device_create_file(&client->dev, &dev_attr_osc);
+ 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);
+
+ 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);
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index e301dea57bb3..f406a2b55aea 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -191,6 +191,8 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
alm_en = readb(base + S3C2410_RTCALM);
+ alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
+
pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
alm_en,
alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
@@ -331,12 +333,8 @@ static int s3c_rtc_ioctl(struct device *dev,
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
- unsigned int rtcalm = readb(s3c_rtc_base + S3C2410_RTCALM);
unsigned int ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
- seq_printf(seq, "alarm_IRQ\t: %s\n",
- (rtcalm & S3C2410_RTCALM_ALMEN) ? "yes" : "no" );
-
seq_printf(seq, "periodic_IRQ\t: %s\n",
(ticnt & S3C2410_TICNT_ENABLE) ? "yes" : "no" );
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index bd4d7d174ef4..9c8ead43a59c 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -289,9 +289,7 @@ static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq)
{
- seq_printf(seq, "trim/divider\t: 0x%08lx\n", RTTR);
- seq_printf(seq, "alarm_IRQ\t: %s\n",
- (RTSR & RTSR_ALE) ? "yes" : "no" );
+ seq_printf(seq, "trim/divider\t: 0x%08x\n", (u32) RTTR);
seq_printf(seq, "update_IRQ\t: %s\n",
(RTSR & RTSR_HZE) ? "yes" : "no");
seq_printf(seq, "periodic_IRQ\t: %s\n",
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 143302a8e79c..e9e0934380b8 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -2,6 +2,7 @@
* SuperH On-Chip RTC Support
*
* Copyright (C) 2006 Paul Mundt
+ * Copyright (C) 2006 Jamie Lenehan
*
* Based on the old arch/sh/kernel/cpu/rtc.c by:
*
@@ -21,7 +22,10 @@
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
-#include <asm/io.h>
+#include <linux/io.h>
+
+#define DRV_NAME "sh-rtc"
+#define DRV_VERSION "0.1.2"
#ifdef CONFIG_CPU_SH3
#define rtc_reg_size sizeof(u16)
@@ -33,22 +37,26 @@
#define RTC_REG(r) ((r) * rtc_reg_size)
-#define R64CNT RTC_REG(0)
-#define RSECCNT RTC_REG(1)
-#define RMINCNT RTC_REG(2)
-#define RHRCNT RTC_REG(3)
-#define RWKCNT RTC_REG(4)
-#define RDAYCNT RTC_REG(5)
-#define RMONCNT RTC_REG(6)
-#define RYRCNT RTC_REG(7)
-#define RSECAR RTC_REG(8)
-#define RMINAR RTC_REG(9)
-#define RHRAR RTC_REG(10)
-#define RWKAR RTC_REG(11)
-#define RDAYAR RTC_REG(12)
-#define RMONAR RTC_REG(13)
-#define RCR1 RTC_REG(14)
-#define RCR2 RTC_REG(15)
+#define R64CNT RTC_REG(0)
+
+#define RSECCNT RTC_REG(1) /* RTC sec */
+#define RMINCNT RTC_REG(2) /* RTC min */
+#define RHRCNT RTC_REG(3) /* RTC hour */
+#define RWKCNT RTC_REG(4) /* RTC week */
+#define RDAYCNT RTC_REG(5) /* RTC day */
+#define RMONCNT RTC_REG(6) /* RTC month */
+#define RYRCNT RTC_REG(7) /* RTC year */
+#define RSECAR RTC_REG(8) /* ALARM sec */
+#define RMINAR RTC_REG(9) /* ALARM min */
+#define RHRAR RTC_REG(10) /* ALARM hour */
+#define RWKAR RTC_REG(11) /* ALARM week */
+#define RDAYAR RTC_REG(12) /* ALARM day */
+#define RMONAR RTC_REG(13) /* ALARM month */
+#define RCR1 RTC_REG(14) /* Control */
+#define RCR2 RTC_REG(15) /* Control */
+
+/* ALARM Bits - or with BCD encoded value */
+#define AR_ENB 0x80 /* Enable for alarm cmp */
/* RCR1 Bits */
#define RCR1_CF 0x80 /* Carry Flag */
@@ -71,22 +79,28 @@ struct sh_rtc {
unsigned int alarm_irq, periodic_irq, carry_irq;
struct rtc_device *rtc_dev;
spinlock_t lock;
+ int rearm_aie;
};
-static irqreturn_t sh_rtc_interrupt(int irq, void *id)
+static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
{
- struct platform_device *pdev = id;
+ struct platform_device *pdev = to_platform_device(dev_id);
struct sh_rtc *rtc = platform_get_drvdata(pdev);
unsigned int tmp, events = 0;
spin_lock(&rtc->lock);
tmp = readb(rtc->regbase + RCR1);
+ tmp &= ~RCR1_CF;
- if (tmp & RCR1_AF)
- events |= RTC_AF | RTC_IRQF;
-
- tmp &= ~(RCR1_CF | RCR1_AF);
+ if (rtc->rearm_aie) {
+ if (tmp & RCR1_AF)
+ tmp &= ~RCR1_AF; /* try to clear AF again */
+ else {
+ tmp |= RCR1_AIE; /* AF has cleared, rearm IRQ */
+ rtc->rearm_aie = 0;
+ }
+ }
writeb(tmp, rtc->regbase + RCR1);
@@ -97,9 +111,45 @@ static irqreturn_t sh_rtc_interrupt(int irq, void *id)
return IRQ_HANDLED;
}
-static irqreturn_t sh_rtc_periodic(int irq, void *id)
+static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
{
- struct sh_rtc *rtc = dev_get_drvdata(id);
+ struct platform_device *pdev = to_platform_device(dev_id);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+ unsigned int tmp, events = 0;
+
+ spin_lock(&rtc->lock);
+
+ tmp = readb(rtc->regbase + RCR1);
+
+ /*
+ * If AF is set then the alarm has triggered. If we clear AF while
+ * the alarm time still matches the RTC time then AF will
+ * immediately be set again, and if AIE is enabled then the alarm
+ * interrupt will immediately be retrigger. So we clear AIE here
+ * and use rtc->rearm_aie so that the carry interrupt will keep
+ * trying to clear AF and once it stays cleared it'll re-enable
+ * AIE.
+ */
+ if (tmp & RCR1_AF) {
+ events |= RTC_AF | RTC_IRQF;
+
+ tmp &= ~(RCR1_AF|RCR1_AIE);
+
+ writeb(tmp, rtc->regbase + RCR1);
+
+ rtc->rearm_aie = 1;
+
+ rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events);
+ }
+
+ spin_unlock(&rtc->lock);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
+{
+ struct platform_device *pdev = to_platform_device(dev_id);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
spin_lock(&rtc->lock);
@@ -139,10 +189,11 @@ static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
tmp = readb(rtc->regbase + RCR1);
- if (enable)
- tmp |= RCR1_AIE;
- else
+ if (!enable) {
tmp &= ~RCR1_AIE;
+ rtc->rearm_aie = 0;
+ } else if (rtc->rearm_aie == 0)
+ tmp |= RCR1_AIE;
writeb(tmp, rtc->regbase + RCR1);
@@ -177,7 +228,7 @@ static int sh_rtc_open(struct device *dev)
goto err_bad_carry;
}
- ret = request_irq(rtc->alarm_irq, sh_rtc_interrupt, IRQF_DISABLED,
+ ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED,
"sh-rtc alarm", dev);
if (unlikely(ret)) {
dev_err(dev, "request alarm IRQ failed with %d, IRQ %d\n",
@@ -200,6 +251,7 @@ static void sh_rtc_release(struct device *dev)
struct sh_rtc *rtc = dev_get_drvdata(dev);
sh_rtc_setpie(dev, 0);
+ sh_rtc_setaie(dev, 0);
free_irq(rtc->periodic_irq, dev);
free_irq(rtc->carry_irq, dev);
@@ -212,8 +264,6 @@ static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
unsigned int tmp;
tmp = readb(rtc->regbase + RCR1);
- seq_printf(seq, "alarm_IRQ\t: %s\n",
- (tmp & RCR1_AIE) ? "yes" : "no");
seq_printf(seq, "carry_IRQ\t: %s\n",
(tmp & RCR1_CIE) ? "yes" : "no");
@@ -267,7 +317,7 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
tm->tm_hour = BCD2BIN(readb(rtc->regbase + RHRCNT));
tm->tm_wday = BCD2BIN(readb(rtc->regbase + RWKCNT));
tm->tm_mday = BCD2BIN(readb(rtc->regbase + RDAYCNT));
- tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT));
+ tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT)) - 1;
#if defined(CONFIG_CPU_SH4)
yr = readw(rtc->regbase + RYRCNT);
@@ -295,7 +345,7 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
"mday=%d, mon=%d, year=%d, wday=%d\n",
__FUNCTION__,
tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+ tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
if (rtc_valid_tm(tm) < 0)
dev_err(dev, "invalid date\n");
@@ -322,7 +372,7 @@ static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm)
writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT);
writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT);
writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT);
- writeb(BIN2BCD(tm->tm_mon), rtc->regbase + RMONCNT);
+ writeb(BIN2BCD(tm->tm_mon + 1), rtc->regbase + RMONCNT);
#ifdef CONFIG_CPU_SH3
year = tm->tm_year % 100;
@@ -344,12 +394,138 @@ static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm)
return 0;
}
+static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off)
+{
+ unsigned int byte;
+ int value = 0xff; /* return 0xff for ignored values */
+
+ byte = readb(rtc->regbase + reg_off);
+ if (byte & AR_ENB) {
+ byte &= ~AR_ENB; /* strip the enable bit */
+ value = BCD2BIN(byte);
+ }
+
+ return value;
+}
+
+static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+ struct rtc_time* tm = &wkalrm->time;
+
+ spin_lock_irq(&rtc->lock);
+
+ tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR);
+ tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR);
+ tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR);
+ tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR);
+ tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR);
+ tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR);
+ if (tm->tm_mon > 0)
+ tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */
+ tm->tm_year = 0xffff;
+
+ wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0;
+
+ spin_unlock_irq(&rtc->lock);
+
+ return 0;
+}
+
+static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc,
+ int value, int reg_off)
+{
+ /* < 0 for a value that is ignored */
+ if (value < 0)
+ writeb(0, rtc->regbase + reg_off);
+ else
+ writeb(BIN2BCD(value) | AR_ENB, rtc->regbase + reg_off);
+}
+
+static int sh_rtc_check_alarm(struct rtc_time* tm)
+{
+ /*
+ * The original rtc says anything > 0xc0 is "don't care" or "match
+ * all" - most users use 0xff but rtc-dev uses -1 for the same thing.
+ * The original rtc doesn't support years - some things use -1 and
+ * some 0xffff. We use -1 to make out tests easier.
+ */
+ if (tm->tm_year == 0xffff)
+ tm->tm_year = -1;
+ if (tm->tm_mon >= 0xff)
+ tm->tm_mon = -1;
+ if (tm->tm_mday >= 0xff)
+ tm->tm_mday = -1;
+ if (tm->tm_wday >= 0xff)
+ tm->tm_wday = -1;
+ if (tm->tm_hour >= 0xff)
+ tm->tm_hour = -1;
+ if (tm->tm_min >= 0xff)
+ tm->tm_min = -1;
+ if (tm->tm_sec >= 0xff)
+ tm->tm_sec = -1;
+
+ if (tm->tm_year > 9999 ||
+ tm->tm_mon >= 12 ||
+ tm->tm_mday == 0 || tm->tm_mday >= 32 ||
+ tm->tm_wday >= 7 ||
+ tm->tm_hour >= 24 ||
+ tm->tm_min >= 60 ||
+ tm->tm_sec >= 60)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_rtc *rtc = platform_get_drvdata(pdev);
+ unsigned int rcr1;
+ struct rtc_time *tm = &wkalrm->time;
+ int mon, err;
+
+ err = sh_rtc_check_alarm(tm);
+ if (unlikely(err < 0))
+ return err;
+
+ spin_lock_irq(&rtc->lock);
+
+ /* disable alarm interrupt and clear flag */
+ rcr1 = readb(rtc->regbase + RCR1);
+ rcr1 &= ~RCR1_AF;
+ writeb(rcr1 & ~RCR1_AIE, rtc->regbase + RCR1);
+
+ rtc->rearm_aie = 0;
+
+ /* set alarm time */
+ sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR);
+ sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR);
+ mon = tm->tm_mon;
+ if (mon >= 0)
+ mon += 1;
+ sh_rtc_write_alarm_value(rtc, mon, RMONAR);
+
+ /* Restore interrupt activation status */
+ writeb(rcr1, rtc->regbase + RCR1);
+
+ spin_unlock_irq(&rtc->lock);
+
+ return 0;
+}
+
static struct rtc_class_ops sh_rtc_ops = {
.open = sh_rtc_open,
.release = sh_rtc_release,
.ioctl = sh_rtc_ioctl,
.read_time = sh_rtc_read_time,
.set_time = sh_rtc_set_time,
+ .read_alarm = sh_rtc_read_alarm,
+ .set_alarm = sh_rtc_set_alarm,
.proc = sh_rtc_proc,
};
@@ -442,7 +618,7 @@ static int __devexit sh_rtc_remove(struct platform_device *pdev)
}
static struct platform_driver sh_rtc_platform_driver = {
.driver = {
- .name = "sh-rtc",
+ .name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = sh_rtc_probe,
@@ -463,5 +639,6 @@ module_init(sh_rtc_init);
module_exit(sh_rtc_exit);
MODULE_DESCRIPTION("SuperH on-chip RTC driver");
-MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, Jamie Lenehan <lenehan@twibble.org>");
MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index 625637b84d33..9418a59fb368 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -83,7 +83,7 @@ static int __devinit rtc_sysfs_add_device(struct class_device *class_dev,
{
int err;
- dev_info(class_dev->dev, "rtc intf: sysfs\n");
+ dev_dbg(class_dev->dev, "rtc intf: sysfs\n");
err = sysfs_create_group(&class_dev->kobj, &rtc_attr_group);
if (err)
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index 6ef9c62d5032..f50a1b8e1607 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -123,11 +123,18 @@ static int test_probe(struct platform_device *plat_dev)
err = PTR_ERR(rtc);
return err;
}
- device_create_file(&plat_dev->dev, &dev_attr_irq);
+
+ err = device_create_file(&plat_dev->dev, &dev_attr_irq);
+ if (err)
+ goto err;
platform_set_drvdata(plat_dev, rtc);
return 0;
+
+err:
+ rtc_device_unregister(rtc);
+ return err;
}
static int __devexit test_remove(struct platform_device *plat_dev)
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c
index 522c69753bbf..019ae255b0c8 100644
--- a/drivers/rtc/rtc-x1205.c
+++ b/drivers/rtc/rtc-x1205.c
@@ -372,7 +372,7 @@ static int x1205_validate_client(struct i2c_client *client)
};
if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) {
- dev_err(&client->adapter->dev,
+ dev_err(&client->dev,
"%s: could not read register %x\n",
__FUNCTION__, probe_zero_pattern[i]);
@@ -380,7 +380,7 @@ static int x1205_validate_client(struct i2c_client *client)
}
if ((buf & probe_zero_pattern[i+1]) != 0) {
- dev_err(&client->adapter->dev,
+ dev_err(&client->dev,
"%s: register=%02x, zero pattern=%d, value=%x\n",
__FUNCTION__, probe_zero_pattern[i], i, buf);
@@ -400,7 +400,7 @@ static int x1205_validate_client(struct i2c_client *client)
};
if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) {
- dev_err(&client->adapter->dev,
+ dev_err(&client->dev,
"%s: could not read register %x\n",
__FUNCTION__, probe_limits_pattern[i].reg);
@@ -411,7 +411,7 @@ static int x1205_validate_client(struct i2c_client *client)
if (value > probe_limits_pattern[i].max ||
value < probe_limits_pattern[i].min) {
- dev_dbg(&client->adapter->dev,
+ dev_dbg(&client->dev,
"%s: register=%x, lim pattern=%d, value=%d\n",
__FUNCTION__, probe_limits_pattern[i].reg,
i, value);
@@ -506,7 +506,7 @@ static int x1205_probe(struct i2c_adapter *adapter, int address, int kind)
struct i2c_client *client;
struct rtc_device *rtc;
- 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;
@@ -562,11 +562,19 @@ static int x1205_probe(struct i2c_adapter *adapter, int address, int kind)
else
dev_err(&client->dev, "couldn't read status\n");
- device_create_file(&client->dev, &dev_attr_atrim);
- device_create_file(&client->dev, &dev_attr_dtrim);
+ err = device_create_file(&client->dev, &dev_attr_atrim);
+ if (err) goto exit_devreg;
+ err = device_create_file(&client->dev, &dev_attr_dtrim);
+ if (err) goto exit_atrim;
return 0;
+exit_atrim:
+ device_remove_file(&client->dev, &dev_attr_atrim);
+
+exit_devreg:
+ rtc_device_unregister(rtc);
+
exit_detach:
i2c_detach_client(client);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 13:36:36 +0300