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-rw-r--r--drivers/rtc/Kconfig29
-rw-r--r--drivers/rtc/Makefile3
-rw-r--r--drivers/rtc/rtc-cmos.c6
-rw-r--r--drivers/rtc/rtc-ds3232.c326
-rw-r--r--drivers/rtc/rtc-fm3130.c181
-rw-r--r--drivers/rtc/rtc-imxdi.c519
-rw-r--r--drivers/rtc/rtc-isl12022.c327
-rw-r--r--drivers/rtc/rtc-m41t80.c4
-rw-r--r--drivers/rtc/rtc-m48t59.c5
-rw-r--r--drivers/rtc/rtc-m48t86.c2
-rw-r--r--drivers/rtc/rtc-max6900.c2
-rw-r--r--drivers/rtc/rtc-mxc.c6
-rw-r--r--drivers/rtc/rtc-nuc900.c64
-rw-r--r--drivers/rtc/rtc-pcf8563.c8
-rw-r--r--drivers/rtc/rtc-pl031.c1
-rw-r--r--drivers/rtc/rtc-pxa.c42
-rw-r--r--drivers/rtc/rtc-rp5c01.c89
17 files changed, 1484 insertions, 130 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 9238c8f40f03..48ca7132cc05 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -166,6 +166,16 @@ config RTC_DRV_DS1672
This driver can also be built as a module. If so, the module
will be called rtc-ds1672.
+config RTC_DRV_DS3232
+ tristate "Dallas/Maxim DS3232"
+ depends on RTC_CLASS && I2C
+ help
+ If you say yes here you get support for Dallas Semiconductor
+ DS3232 real-time clock chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-ds3232.
+
config RTC_DRV_MAX6900
tristate "Maxim MAX6900"
help
@@ -203,6 +213,15 @@ config RTC_DRV_ISL1208
This driver can also be built as a module. If so, the module
will be called rtc-isl1208.
+config RTC_DRV_ISL12022
+ tristate "Intersil ISL12022"
+ help
+ If you say yes here you get support for the
+ Intersil ISL12022 RTC chip.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-isl12022.
+
config RTC_DRV_X1205
tristate "Xicor/Intersil X1205"
help
@@ -537,6 +556,16 @@ config RTC_DRV_MSM6242
This driver can also be built as a module. If so, the module
will be called rtc-msm6242.
+config RTC_DRV_IMXDI
+ tristate "Freescale IMX DryIce Real Time Clock"
+ depends on ARCH_MX25
+ depends on RTC_CLASS
+ help
+ Support for Freescale IMX DryIce RTC
+
+ This driver can also be built as a module, if so, the module
+ will be called "rtc-imxdi".
+
config RTC_MXC
tristate "Freescale MXC Real Time Clock"
depends on ARCH_MXC
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index fedf9bb36593..0f207b3b5833 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -41,12 +41,15 @@ obj-$(CONFIG_RTC_DRV_DS1511) += rtc-ds1511.o
obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o
obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o
+obj-$(CONFIG_RTC_DRV_DS3232) += rtc-ds3232.o
obj-$(CONFIG_RTC_DRV_DS3234) += rtc-ds3234.o
obj-$(CONFIG_RTC_DRV_EFI) += rtc-efi.o
obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o
+obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o
obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
+obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o
obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o
obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 11b8ea29d2b7..5856167a0c90 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -970,7 +970,6 @@ static inline int cmos_poweroff(struct device *dev)
#include <linux/acpi.h>
-#ifdef CONFIG_PM
static u32 rtc_handler(void *context)
{
acpi_clear_event(ACPI_EVENT_RTC);
@@ -999,11 +998,6 @@ static void rtc_wake_off(struct device *dev)
{
acpi_disable_event(ACPI_EVENT_RTC, 0);
}
-#else
-#define rtc_wake_setup() do{}while(0)
-#define rtc_wake_on NULL
-#define rtc_wake_off NULL
-#endif
/* Every ACPI platform has a mc146818 compatible "cmos rtc". Here we find
* its device node and pass extra config data. This helps its driver use
diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c
new file mode 100644
index 000000000000..9daed8db83d3
--- /dev/null
+++ b/drivers/rtc/rtc-ds3232.c
@@ -0,0 +1,326 @@
+/*
+ * RTC client/driver for the Maxim/Dallas DS3232 Real-Time Clock over I2C
+ *
+ * Copyright (C) 2009-2010 Freescale Semiconductor.
+ *
+ * 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.
+ */
+/*
+ * It would be more efficient to use i2c msgs/i2c_transfer directly but, as
+ * recommened in .../Documentation/i2c/writing-clients section
+ * "Sending and receiving", using SMBus level communication is preferred.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+
+#define DS3232_REG_SECONDS 0x00
+#define DS3232_REG_MINUTES 0x01
+#define DS3232_REG_HOURS 0x02
+#define DS3232_REG_AMPM 0x02
+#define DS3232_REG_DAY 0x03
+#define DS3232_REG_DATE 0x04
+#define DS3232_REG_MONTH 0x05
+#define DS3232_REG_CENTURY 0x05
+#define DS3232_REG_YEAR 0x06
+#define DS3232_REG_ALARM1 0x07 /* Alarm 1 BASE */
+#define DS3232_REG_ALARM2 0x0B /* Alarm 2 BASE */
+#define DS3232_REG_CR 0x0E /* Control register */
+# define DS3232_REG_CR_nEOSC 0x80
+# define DS3232_REG_CR_INTCN 0x04
+# define DS3232_REG_CR_A2IE 0x02
+# define DS3232_REG_CR_A1IE 0x01
+
+#define DS3232_REG_SR 0x0F /* control/status register */
+# define DS3232_REG_SR_OSF 0x80
+# define DS3232_REG_SR_BSY 0x04
+# define DS3232_REG_SR_A2F 0x02
+# define DS3232_REG_SR_A1F 0x01
+
+struct ds3232 {
+ struct i2c_client *client;
+ struct rtc_device *rtc;
+ struct work_struct work;
+
+ /* The mutex protects alarm operations, and prevents a race
+ * between the enable_irq() in the workqueue and the free_irq()
+ * in the remove function.
+ */
+ struct mutex mutex;
+ int exiting;
+};
+
+static struct i2c_driver ds3232_driver;
+
+static int ds3232_check_rtc_status(struct i2c_client *client)
+{
+ int ret = 0;
+ int control, stat;
+
+ stat = i2c_smbus_read_byte_data(client, DS3232_REG_SR);
+ if (stat < 0)
+ return stat;
+
+ if (stat & DS3232_REG_SR_OSF)
+ dev_warn(&client->dev,
+ "oscillator discontinuity flagged, "
+ "time unreliable\n");
+
+ stat &= ~(DS3232_REG_SR_OSF | DS3232_REG_SR_A1F | DS3232_REG_SR_A2F);
+
+ ret = i2c_smbus_write_byte_data(client, DS3232_REG_SR, stat);
+ if (ret < 0)
+ return ret;
+
+ /* If the alarm is pending, clear it before requesting
+ * the interrupt, so an interrupt event isn't reported
+ * before everything is initialized.
+ */
+
+ control = i2c_smbus_read_byte_data(client, DS3232_REG_CR);
+ if (control < 0)
+ return control;
+
+ control &= ~(DS3232_REG_CR_A1IE | DS3232_REG_CR_A2IE);
+ control |= DS3232_REG_CR_INTCN;
+
+ return i2c_smbus_write_byte_data(client, DS3232_REG_CR, control);
+}
+
+static int ds3232_read_time(struct device *dev, struct rtc_time *time)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+ u8 buf[7];
+ unsigned int year, month, day, hour, minute, second;
+ unsigned int week, twelve_hr, am_pm;
+ unsigned int century, add_century = 0;
+
+ ret = i2c_smbus_read_i2c_block_data(client, DS3232_REG_SECONDS, 7, buf);
+
+ if (ret < 0)
+ return ret;
+ if (ret < 7)
+ return -EIO;
+
+ second = buf[0];
+ minute = buf[1];
+ hour = buf[2];
+ week = buf[3];
+ day = buf[4];
+ month = buf[5];
+ year = buf[6];
+
+ /* Extract additional information for AM/PM and century */
+
+ twelve_hr = hour & 0x40;
+ am_pm = hour & 0x20;
+ century = month & 0x80;
+
+ /* Write to rtc_time structure */
+
+ time->tm_sec = bcd2bin(second);
+ time->tm_min = bcd2bin(minute);
+ if (twelve_hr) {
+ /* Convert to 24 hr */
+ if (am_pm)
+ time->tm_hour = bcd2bin(hour & 0x1F) + 12;
+ else
+ time->tm_hour = bcd2bin(hour & 0x1F);
+ } else {
+ time->tm_hour = bcd2bin(hour);
+ }
+
+ time->tm_wday = bcd2bin(week);
+ time->tm_mday = bcd2bin(day);
+ time->tm_mon = bcd2bin(month & 0x7F);
+ if (century)
+ add_century = 100;
+
+ time->tm_year = bcd2bin(year) + add_century;
+
+ return rtc_valid_tm(time);
+}
+
+static int ds3232_set_time(struct device *dev, struct rtc_time *time)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ u8 buf[7];
+
+ /* Extract time from rtc_time and load into ds3232*/
+
+ buf[0] = bin2bcd(time->tm_sec);
+ buf[1] = bin2bcd(time->tm_min);
+ buf[2] = bin2bcd(time->tm_hour);
+ buf[3] = bin2bcd(time->tm_wday); /* Day of the week */
+ buf[4] = bin2bcd(time->tm_mday); /* Date */
+ buf[5] = bin2bcd(time->tm_mon);
+ if (time->tm_year >= 100) {
+ buf[5] |= 0x80;
+ buf[6] = bin2bcd(time->tm_year - 100);
+ } else {
+ buf[6] = bin2bcd(time->tm_year);
+ }
+
+ return i2c_smbus_write_i2c_block_data(client,
+ DS3232_REG_SECONDS, 7, buf);
+}
+
+static irqreturn_t ds3232_irq(int irq, void *dev_id)
+{
+ struct i2c_client *client = dev_id;
+ struct ds3232 *ds3232 = i2c_get_clientdata(client);
+
+ disable_irq_nosync(irq);
+ schedule_work(&ds3232->work);
+ return IRQ_HANDLED;
+}
+
+static void ds3232_work(struct work_struct *work)
+{
+ struct ds3232 *ds3232 = container_of(work, struct ds3232, work);
+ struct i2c_client *client = ds3232->client;
+ int stat, control;
+
+ mutex_lock(&ds3232->mutex);
+
+ stat = i2c_smbus_read_byte_data(client, DS3232_REG_SR);
+ if (stat < 0)
+ goto unlock;
+
+ if (stat & DS3232_REG_SR_A1F) {
+ control = i2c_smbus_read_byte_data(client, DS3232_REG_CR);
+ if (control < 0)
+ goto out;
+ /* disable alarm1 interrupt */
+ control &= ~(DS3232_REG_CR_A1IE);
+ i2c_smbus_write_byte_data(client, DS3232_REG_CR, control);
+
+ /* clear the alarm pend flag */
+ stat &= ~DS3232_REG_SR_A1F;
+ i2c_smbus_write_byte_data(client, DS3232_REG_SR, stat);
+
+ rtc_update_irq(ds3232->rtc, 1, RTC_AF | RTC_IRQF);
+ }
+
+out:
+ if (!ds3232->exiting)
+ enable_irq(client->irq);
+unlock:
+ mutex_unlock(&ds3232->mutex);
+}
+
+static const struct rtc_class_ops ds3232_rtc_ops = {
+ .read_time = ds3232_read_time,
+ .set_time = ds3232_set_time,
+};
+
+static int __devinit ds3232_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ds3232 *ds3232;
+ int ret;
+
+ ds3232 = kzalloc(sizeof(struct ds3232), GFP_KERNEL);
+ if (!ds3232)
+ return -ENOMEM;
+
+ ds3232->client = client;
+ i2c_set_clientdata(client, ds3232);
+
+ INIT_WORK(&ds3232->work, ds3232_work);
+ mutex_init(&ds3232->mutex);
+
+ ret = ds3232_check_rtc_status(client);
+ if (ret)
+ goto out_free;
+
+ ds3232->rtc = rtc_device_register(client->name, &client->dev,
+ &ds3232_rtc_ops, THIS_MODULE);
+ if (IS_ERR(ds3232->rtc)) {
+ ret = PTR_ERR(ds3232->rtc);
+ dev_err(&client->dev, "unable to register the class device\n");
+ goto out_irq;
+ }
+
+ if (client->irq >= 0) {
+ ret = request_irq(client->irq, ds3232_irq, 0,
+ "ds3232", client);
+ if (ret) {
+ dev_err(&client->dev, "unable to request IRQ\n");
+ goto out_free;
+ }
+ }
+
+ return 0;
+
+out_irq:
+ if (client->irq >= 0)
+ free_irq(client->irq, client);
+
+out_free:
+ i2c_set_clientdata(client, NULL);
+ kfree(ds3232);
+ return ret;
+}
+
+static int __devexit ds3232_remove(struct i2c_client *client)
+{
+ struct ds3232 *ds3232 = i2c_get_clientdata(client);
+
+ if (client->irq >= 0) {
+ mutex_lock(&ds3232->mutex);
+ ds3232->exiting = 1;
+ mutex_unlock(&ds3232->mutex);
+
+ free_irq(client->irq, client);
+ flush_scheduled_work();
+ }
+
+ rtc_device_unregister(ds3232->rtc);
+ i2c_set_clientdata(client, NULL);
+ kfree(ds3232);
+ return 0;
+}
+
+static const struct i2c_device_id ds3232_id[] = {
+ { "ds3232", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ds3232_id);
+
+static struct i2c_driver ds3232_driver = {
+ .driver = {
+ .name = "rtc-ds3232",
+ .owner = THIS_MODULE,
+ },
+ .probe = ds3232_probe,
+ .remove = __devexit_p(ds3232_remove),
+ .id_table = ds3232_id,
+};
+
+static int __init ds3232_init(void)
+{
+ return i2c_add_driver(&ds3232_driver);
+}
+
+static void __exit ds3232_exit(void)
+{
+ i2c_del_driver(&ds3232_driver);
+}
+
+module_init(ds3232_init);
+module_exit(ds3232_exit);
+
+MODULE_AUTHOR("Srikanth Srinivasan <srikanth.srinivasan@freescale.com>");
+MODULE_DESCRIPTION("Maxim/Dallas DS3232 RTC Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c
index e4de8f37ae4a..4cf2e70c5078 100644
--- a/drivers/rtc/rtc-fm3130.c
+++ b/drivers/rtc/rtc-fm3130.c
@@ -52,8 +52,8 @@ struct fm3130 {
struct i2c_msg msg[4];
struct i2c_client *client;
struct rtc_device *rtc;
+ int alarm_valid;
int data_valid;
- int alarm;
};
static const struct i2c_device_id fm3130_id[] = {
{ "fm3130", 0 },
@@ -87,11 +87,7 @@ static void fm3130_rtc_mode(struct device *dev, int mode)
dev_dbg(dev, "invalid mode %d\n", mode);
break;
}
- /* Checking for alarm */
- if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AF) {
- fm3130->alarm = 1;
- fm3130->regs[FM3130_RTC_CONTROL] &= ~FM3130_RTC_CONTROL_BIT_AF;
- }
+
i2c_smbus_write_byte_data(fm3130->client,
FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL]);
}
@@ -208,6 +204,17 @@ static int fm3130_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct fm3130 *fm3130 = dev_get_drvdata(dev);
int tmp;
struct rtc_time *tm = &alrm->time;
+
+ if (!fm3130->alarm_valid) {
+ /*
+ * We have invalid alarm in RTC, probably due to battery faults
+ * or other problems. Return EIO for now, it will allow us to
+ * set alarm value later instead of error during probing which
+ * disables device
+ */
+ return -EIO;
+ }
+
/* read the RTC alarm registers all at once */
tmp = i2c_transfer(to_i2c_adapter(fm3130->client->dev.parent),
&fm3130->msg[2], 2);
@@ -222,20 +229,31 @@ static int fm3130_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
fm3130->regs[FM3130_ALARM_DATE],
fm3130->regs[FM3130_ALARM_MONTHS]);
-
tm->tm_sec = bcd2bin(fm3130->regs[FM3130_ALARM_SECONDS] & 0x7F);
tm->tm_min = bcd2bin(fm3130->regs[FM3130_ALARM_MINUTES] & 0x7F);
tm->tm_hour = bcd2bin(fm3130->regs[FM3130_ALARM_HOURS] & 0x3F);
tm->tm_mday = bcd2bin(fm3130->regs[FM3130_ALARM_DATE] & 0x3F);
tm->tm_mon = bcd2bin(fm3130->regs[FM3130_ALARM_MONTHS] & 0x1F);
+
if (tm->tm_mon > 0)
tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */
+
dev_dbg(dev, "%s secs=%d, mins=%d, "
"hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
"read alarm", tm->tm_sec, tm->tm_min,
tm->tm_hour, tm->tm_mday,
tm->tm_mon, tm->tm_year, tm->tm_wday);
+ /* check if alarm enabled */
+ fm3130->regs[FM3130_RTC_CONTROL] =
+ i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
+
+ if ((fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AEN) &&
+ (~fm3130->regs[FM3130_RTC_CONTROL] &
+ FM3130_RTC_CONTROL_BIT_CAL)) {
+ alrm->enabled = 1;
+ }
+
return 0;
}
@@ -251,25 +269,20 @@ static int fm3130_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
tm->tm_hour, tm->tm_mday,
tm->tm_mon, tm->tm_year, tm->tm_wday);
- if (tm->tm_sec != -1)
- fm3130->regs[FM3130_ALARM_SECONDS] =
- bin2bcd(tm->tm_sec) | 0x80;
+ fm3130->regs[FM3130_ALARM_SECONDS] =
+ (tm->tm_sec != -1) ? bin2bcd(tm->tm_sec) : 0x80;
- if (tm->tm_min != -1)
- fm3130->regs[FM3130_ALARM_MINUTES] =
- bin2bcd(tm->tm_min) | 0x80;
+ fm3130->regs[FM3130_ALARM_MINUTES] =
+ (tm->tm_min != -1) ? bin2bcd(tm->tm_min) : 0x80;
- if (tm->tm_hour != -1)
- fm3130->regs[FM3130_ALARM_HOURS] =
- bin2bcd(tm->tm_hour) | 0x80;
+ fm3130->regs[FM3130_ALARM_HOURS] =
+ (tm->tm_hour != -1) ? bin2bcd(tm->tm_hour) : 0x80;
- if (tm->tm_mday != -1)
- fm3130->regs[FM3130_ALARM_DATE] =
- bin2bcd(tm->tm_mday) | 0x80;
+ fm3130->regs[FM3130_ALARM_DATE] =
+ (tm->tm_mday != -1) ? bin2bcd(tm->tm_mday) : 0x80;
- if (tm->tm_mon != -1)
- fm3130->regs[FM3130_ALARM_MONTHS] =
- bin2bcd(tm->tm_mon + 1) | 0x80;
+ fm3130->regs[FM3130_ALARM_MONTHS] =
+ (tm->tm_mon != -1) ? bin2bcd(tm->tm_mon + 1) : 0x80;
dev_dbg(dev, "alarm write %02x %02x %02x %02x %02x\n",
fm3130->regs[FM3130_ALARM_SECONDS],
@@ -285,11 +298,8 @@ static int fm3130_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
}
fm3130->regs[FM3130_RTC_CONTROL] =
i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
- /* Checking for alarm */
- if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AF) {
- fm3130->alarm = 1;
- fm3130->regs[FM3130_RTC_CONTROL] &= ~FM3130_RTC_CONTROL_BIT_AF;
- }
+
+ /* enable or disable alarm */
if (alrm->enabled) {
i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL,
(fm3130->regs[FM3130_RTC_CONTROL] &
@@ -298,16 +308,55 @@ static int fm3130_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
} else {
i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL,
fm3130->regs[FM3130_RTC_CONTROL] &
- ~(FM3130_RTC_CONTROL_BIT_AEN));
+ ~(FM3130_RTC_CONTROL_BIT_CAL) &
+ ~(FM3130_RTC_CONTROL_BIT_AEN));
}
+
+ /* We assume here that data is valid once written */
+ if (!fm3130->alarm_valid)
+ fm3130->alarm_valid = 1;
+
return 0;
}
+static int fm3130_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+ struct fm3130 *fm3130 = dev_get_drvdata(dev);
+ int ret = 0;
+
+ fm3130->regs[FM3130_RTC_CONTROL] =
+ i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
+
+ dev_dbg(dev, "alarm_irq_enable: enable=%d, FM3130_RTC_CONTROL=%02x\n",
+ enabled, fm3130->regs[FM3130_RTC_CONTROL]);
+
+ switch (enabled) {
+ case 0: /* alarm off */
+ ret = i2c_smbus_write_byte_data(fm3130->client,
+ FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL] &
+ ~(FM3130_RTC_CONTROL_BIT_CAL) &
+ ~(FM3130_RTC_CONTROL_BIT_AEN));
+ break;
+ case 1: /* alarm on */
+ ret = i2c_smbus_write_byte_data(fm3130->client,
+ FM3130_RTC_CONTROL, (fm3130->regs[FM3130_RTC_CONTROL] &
+ ~(FM3130_RTC_CONTROL_BIT_CAL)) |
+ FM3130_RTC_CONTROL_BIT_AEN);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
static const struct rtc_class_ops fm3130_rtc_ops = {
.read_time = fm3130_get_time,
.set_time = fm3130_set_time,
.read_alarm = fm3130_read_alarm,
.set_alarm = fm3130_set_alarm,
+ .alarm_irq_enable = fm3130_alarm_irq_enable,
};
static struct i2c_driver fm3130_driver;
@@ -356,6 +405,7 @@ static int __devinit fm3130_probe(struct i2c_client *client,
fm3130->msg[3].len = FM3130_ALARM_REGS;
fm3130->msg[3].buf = &fm3130->regs[FM3130_ALARM_SECONDS];
+ fm3130->alarm_valid = 0;
fm3130->data_valid = 0;
tmp = i2c_transfer(adapter, fm3130->msg, 4);
@@ -370,12 +420,6 @@ static int __devinit fm3130_probe(struct i2c_client *client,
fm3130->regs[FM3130_CAL_CONTROL] =
i2c_smbus_read_byte_data(client, FM3130_CAL_CONTROL);
- /* Checking for alarm */
- if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AF) {
- fm3130->alarm = 1;
- fm3130->regs[FM3130_RTC_CONTROL] &= ~FM3130_RTC_CONTROL_BIT_AF;
- }
-
/* Disabling calibration mode */
if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_CAL) {
i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
@@ -400,44 +444,79 @@ static int __devinit fm3130_probe(struct i2c_client *client,
fm3130->regs[FM3130_CAL_CONTROL] &
~(FM3130_CAL_CONTROL_BIT_nOSCEN));
- /* oscillator fault? clear flag, and warn */
- if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_LB)
+ /* low battery? clear flag, and warn */
+ if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_LB) {
+ i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
+ fm3130->regs[FM3130_RTC_CONTROL] &
+ ~(FM3130_RTC_CONTROL_BIT_LB));
dev_warn(&client->dev, "Low battery!\n");
+ }
- /* oscillator fault? clear flag, and warn */
+ /* check if Power On Reset bit is set */
if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_POR) {
i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
fm3130->regs[FM3130_RTC_CONTROL] &
~FM3130_RTC_CONTROL_BIT_POR);
- dev_warn(&client->dev, "SET TIME!\n");
+ dev_dbg(&client->dev, "POR bit is set\n");
}
/* ACS is controlled by alarm */
i2c_smbus_write_byte_data(client, FM3130_ALARM_WP_CONTROL, 0x80);
- /* TODO */
- /* TODO need to sanity check alarm */
- tmp = fm3130->regs[FM3130_RTC_SECONDS];
- tmp = bcd2bin(tmp & 0x7f);
- if (tmp > 60)
- goto exit_bad;
+ /* alarm registers sanity check */
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f);
+ if (tmp > 59)
+ goto bad_alarm;
+
tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f);
- if (tmp > 60)
- goto exit_bad;
+ if (tmp > 59)
+ goto bad_alarm;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f);
+ if (tmp > 23)
+ goto bad_alarm;
tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f);
if (tmp == 0 || tmp > 31)
- goto exit_bad;
+ goto bad_alarm;
tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f);
if (tmp == 0 || tmp > 12)
- goto exit_bad;
+ goto bad_alarm;
- tmp = fm3130->regs[FM3130_RTC_HOURS];
+ fm3130->alarm_valid = 1;
+
+bad_alarm:
+
+ /* clock registers sanity chek */
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f);
+ if (tmp > 59)
+ goto bad_clock;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f);
+ if (tmp > 59)
+ goto bad_clock;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f);
+ if (tmp > 23)
+ goto bad_clock;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x7);
+ if (tmp == 0 || tmp > 7)
+ goto bad_clock;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f);
+ if (tmp == 0 || tmp > 31)
+ goto bad_clock;
+
+ tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f);
+ if (tmp == 0 || tmp > 12)
+ goto bad_clock;
fm3130->data_valid = 1;
-exit_bad:
- if (!fm3130->data_valid)
+bad_clock:
+
+ if (!fm3130->data_valid || !fm3130->alarm_valid)
dev_dbg(&client->dev,
"%s: %02x %02x %02x %02x %02x %02x %02x %02x"
"%02x %02x %02x %02x %02x %02x %02x\n",
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
new file mode 100644
index 000000000000..2dd3c0163272
--- /dev/null
+++ b/drivers/rtc/rtc-imxdi.c
@@ -0,0 +1,519 @@
+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2010 Orex Computed Radiography
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/* based on rtc-mc13892.c */
+
+/*
+ * This driver uses the 47-bit 32 kHz counter in the Freescale DryIce block
+ * to implement a Linux RTC. Times and alarms are truncated to seconds.
+ * Since the RTC framework performs API locking via rtc->ops_lock the
+ * only simultaneous accesses we need to deal with is updating DryIce
+ * registers while servicing an alarm.
+ *
+ * Note that reading the DSR (DryIce Status Register) automatically clears
+ * the WCF (Write Complete Flag). All DryIce writes are synchronized to the
+ * LP (Low Power) domain and set the WCF upon completion. Writes to the
+ * DIER (DryIce Interrupt Enable Register) are the only exception. These
+ * occur at normal bus speeds and do not set WCF. Periodic interrupts are
+ * not supported by the hardware.
+ */
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/workqueue.h>
+
+/* DryIce Register Definitions */
+
+#define DTCMR 0x00 /* Time Counter MSB Reg */
+#define DTCLR 0x04 /* Time Counter LSB Reg */
+
+#define DCAMR 0x08 /* Clock Alarm MSB Reg */
+#define DCALR 0x0c /* Clock Alarm LSB Reg */
+#define DCAMR_UNSET 0xFFFFFFFF /* doomsday - 1 sec */
+
+#define DCR 0x10 /* Control Reg */
+#define DCR_TCE (1 << 3) /* Time Counter Enable */
+
+#define DSR 0x14 /* Status Reg */
+#define DSR_WBF (1 << 10) /* Write Busy Flag */
+#define DSR_WNF (1 << 9) /* Write Next Flag */
+#define DSR_WCF (1 << 8) /* Write Complete Flag */
+#define DSR_WEF (1 << 7) /* Write Error Flag */
+#define DSR_CAF (1 << 4) /* Clock Alarm Flag */
+#define DSR_NVF (1 << 1) /* Non-Valid Flag */
+#define DSR_SVF (1 << 0) /* Security Violation Flag */
+
+#define DIER 0x18 /* Interrupt Enable Reg */
+#define DIER_WNIE (1 << 9) /* Write Next Interrupt Enable */
+#define DIER_WCIE (1 << 8) /* Write Complete Interrupt Enable */
+#define DIER_WEIE (1 << 7) /* Write Error Interrupt Enable */
+#define DIER_CAIE (1 << 4) /* Clock Alarm Interrupt Enable */
+
+/**
+ * struct imxdi_dev - private imxdi rtc data
+ * @pdev: pionter to platform dev
+ * @rtc: pointer to rtc struct
+ * @ioaddr: IO registers pointer
+ * @irq: dryice normal interrupt
+ * @clk: input reference clock
+ * @dsr: copy of the DSR register
+ * @irq_lock: interrupt enable register (DIER) lock
+ * @write_wait: registers write complete queue
+ * @write_mutex: serialize registers write
+ * @work: schedule alarm work
+ */
+struct imxdi_dev {
+ struct platform_device *pdev;
+ struct rtc_device *rtc;
+ void __iomem *ioaddr;
+ int irq;
+ struct clk *clk;
+ u32 dsr;
+ spinlock_t irq_lock;
+ wait_queue_head_t write_wait;
+ struct mutex write_mutex;
+ struct work_struct work;
+};
+
+/*
+ * enable a dryice interrupt
+ */
+static void di_int_enable(struct imxdi_dev *imxdi, u32 intr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&imxdi->irq_lock, flags);
+ __raw_writel(__raw_readl(imxdi->ioaddr + DIER) | intr,
+ imxdi->ioaddr + DIER);
+ spin_unlock_irqrestore(&imxdi->irq_lock, flags);
+}
+
+/*
+ * disable a dryice interrupt
+ */
+static void di_int_disable(struct imxdi_dev *imxdi, u32 intr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&imxdi->irq_lock, flags);
+ __raw_writel(__raw_readl(imxdi->ioaddr + DIER) & ~intr,
+ imxdi->ioaddr + DIER);
+ spin_unlock_irqrestore(&imxdi->irq_lock, flags);
+}
+
+/*
+ * This function attempts to clear the dryice write-error flag.
+ *
+ * A dryice write error is similar to a bus fault and should not occur in
+ * normal operation. Clearing the flag requires another write, so the root
+ * cause of the problem may need to be fixed before the flag can be cleared.
+ */
+static void clear_write_error(struct imxdi_dev *imxdi)
+{
+ int cnt;
+
+ dev_warn(&imxdi->pdev->dev, "WARNING: Register write error!\n");
+
+ /* clear the write error flag */
+ __raw_writel(DSR_WEF, imxdi->ioaddr + DSR);
+
+ /* wait for it to take effect */
+ for (cnt = 0; cnt < 1000; cnt++) {
+ if ((__raw_readl(imxdi->ioaddr + DSR) & DSR_WEF) == 0)
+ return;
+ udelay(10);
+ }
+ dev_err(&imxdi->pdev->dev,
+ "ERROR: Cannot clear write-error flag!\n");
+}
+
+/*
+ * Write a dryice register and wait until it completes.
+ *
+ * This function uses interrupts to determine when the
+ * write has completed.
+ */
+static int di_write_wait(struct imxdi_dev *imxdi, u32 val, int reg)
+{
+ int ret;
+ int rc = 0;
+
+ /* serialize register writes */
+ mutex_lock(&imxdi->write_mutex);
+
+ /* enable the write-complete interrupt */
+ di_int_enable(imxdi, DIER_WCIE);
+
+ imxdi->dsr = 0;
+
+ /* do the register write */
+ __raw_writel(val, imxdi->ioaddr + reg);
+
+ /* wait for the write to finish */
+ ret = wait_event_interruptible_timeout(imxdi->write_wait,
+ imxdi->dsr & (DSR_WCF | DSR_WEF), msecs_to_jiffies(1));
+ if (ret < 0) {
+ rc = ret;
+ goto out;
+ } else if (ret == 0) {
+ dev_warn(&imxdi->pdev->dev,
+ "Write-wait timeout "
+ "val = 0x%08x reg = 0x%08x\n", val, reg);
+ }
+
+ /* check for write error */
+ if (imxdi->dsr & DSR_WEF) {
+ clear_write_error(imxdi);
+ rc = -EIO;
+ }
+
+out:
+ mutex_unlock(&imxdi->write_mutex);
+
+ return rc;
+}
+
+/*
+ * read the seconds portion of the current time from the dryice time counter
+ */
+static int dryice_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct imxdi_dev *imxdi = dev_get_drvdata(dev);
+ unsigned long now;
+
+ now = __raw_readl(imxdi->ioaddr + DTCMR);
+ rtc_time_to_tm(now, tm);
+
+ return 0;
+}
+
+/*
+ * set the seconds portion of dryice time counter and clear the
+ * fractional part.
+ */
+static int dryice_rtc_set_mmss(struct device *dev, unsigned long secs)
+{
+ struct imxdi_dev *imxdi = dev_get_drvdata(dev);
+ int rc;
+
+ /* zero the fractional part first */
+ rc = di_write_wait(imxdi, 0, DTCLR);
+ if (rc == 0)
+ rc = di_write_wait(imxdi, secs, DTCMR);
+
+ return rc;
+}
+
+static int dryice_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ struct imxdi_dev *imxdi = dev_get_drvdata(dev);
+
+ if (enabled)
+ di_int_enable(imxdi, DIER_CAIE);
+ else
+ di_int_disable(imxdi, DIER_CAIE);
+
+ return 0;
+}
+
+/*
+ * read the seconds portion of the alarm register.
+ * the fractional part of the alarm register is always zero.
+ */
+static int dryice_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+ struct imxdi_dev *imxdi = dev_get_drvdata(dev);
+ u32 dcamr;
+
+ dcamr = __raw_readl(imxdi->ioaddr + DCAMR);
+ rtc_time_to_tm(dcamr, &alarm->time);
+
+ /* alarm is enabled if the interrupt is enabled */
+ alarm->enabled = (__raw_readl(imxdi->ioaddr + DIER) & DIER_CAIE) != 0;
+
+ /* don't allow the DSR read to mess up DSR_WCF */
+ mutex_lock(&imxdi->write_mutex);
+
+ /* alarm is pending if the alarm flag is set */
+ alarm->pending = (__raw_readl(imxdi->ioaddr + DSR) & DSR_CAF) != 0;
+
+ mutex_unlock(&imxdi->write_mutex);
+
+ return 0;
+}
+
+/*
+ * set the seconds portion of dryice alarm register
+ */
+static int dryice_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+ struct imxdi_dev *imxdi = dev_get_drvdata(dev);
+ unsigned long now;
+ unsigned long alarm_time;
+ int rc;
+
+ rc = rtc_tm_to_time(&alarm->time, &alarm_time);
+ if (rc)
+ return rc;
+
+ /* don't allow setting alarm in the past */
+ now = __raw_readl(imxdi->ioaddr + DTCMR);
+ if (alarm_time < now)
+ return -EINVAL;
+
+ /* write the new alarm time */
+ rc = di_write_wait(imxdi, (u32)alarm_time, DCAMR);
+ if (rc)
+ return rc;
+
+ if (alarm->enabled)
+ di_int_enable(imxdi, DIER_CAIE); /* enable alarm intr */
+ else
+ di_int_disable(imxdi, DIER_CAIE); /* disable alarm intr */
+
+ return 0;
+}
+
+static struct rtc_class_ops dryice_rtc_ops = {
+ .read_time = dryice_rtc_read_time,
+ .set_mmss = dryice_rtc_set_mmss,
+ .alarm_irq_enable = dryice_rtc_alarm_irq_enable,
+ .read_alarm = dryice_rtc_read_alarm,
+ .set_alarm = dryice_rtc_set_alarm,
+};
+
+/*
+ * dryice "normal" interrupt handler
+ */
+static irqreturn_t dryice_norm_irq(int irq, void *dev_id)
+{
+ struct imxdi_dev *imxdi = dev_id;
+ u32 dsr, dier;
+ irqreturn_t rc = IRQ_NONE;
+
+ dier = __raw_readl(imxdi->ioaddr + DIER);
+
+ /* handle write complete and write error cases */
+ if ((dier & DIER_WCIE)) {
+ /*If the write wait queue is empty then there is no pending
+ operations. It means the interrupt is for DryIce -Security.
+ IRQ must be returned as none.*/
+ if (list_empty_careful(&imxdi->write_wait.task_list))
+ return rc;
+
+ /* DSR_WCF clears itself on DSR read */
+ dsr = __raw_readl(imxdi->ioaddr + DSR);
+ if ((dsr & (DSR_WCF | DSR_WEF))) {
+ /* mask the interrupt */
+ di_int_disable(imxdi, DIER_WCIE);
+
+ /* save the dsr value for the wait queue */
+ imxdi->dsr |= dsr;
+
+ wake_up_interruptible(&imxdi->write_wait);
+ rc = IRQ_HANDLED;
+ }
+ }
+
+ /* handle the alarm case */
+ if ((dier & DIER_CAIE)) {
+ /* DSR_WCF clears itself on DSR read */
+ dsr = __raw_readl(imxdi->ioaddr + DSR);
+ if (dsr & DSR_CAF) {
+ /* mask the interrupt */
+ di_int_disable(imxdi, DIER_CAIE);
+
+ /* finish alarm in user context */
+ schedule_work(&imxdi->work);
+ rc = IRQ_HANDLED;
+ }
+ }
+ return rc;
+}
+
+/*
+ * post the alarm event from user context so it can sleep
+ * on the write completion.
+ */
+static void dryice_work(struct work_struct *work)
+{
+ struct imxdi_dev *imxdi = container_of(work,
+ struct imxdi_dev, work);
+
+ /* dismiss the interrupt (ignore error) */
+ di_write_wait(imxdi, DSR_CAF, DSR);
+
+ /* pass the alarm event to the rtc framework. */
+ rtc_update_irq(imxdi->rtc, 1, RTC_AF | RTC_IRQF);
+}
+
+/*
+ * probe for dryice rtc device
+ */
+static int dryice_rtc_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct imxdi_dev *imxdi;
+ int rc;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ imxdi = devm_kzalloc(&pdev->dev, sizeof(*imxdi), GFP_KERNEL);
+ if (!imxdi)
+ return -ENOMEM;
+
+ imxdi->pdev = pdev;
+
+ if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ pdev->name))
+ return -EBUSY;
+
+ imxdi->ioaddr = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (imxdi->ioaddr == NULL)
+ return -ENOMEM;
+
+ imxdi->irq = platform_get_irq(pdev, 0);
+ if (imxdi->irq < 0)
+ return imxdi->irq;
+
+ init_waitqueue_head(&imxdi->write_wait);
+
+ INIT_WORK(&imxdi->work, dryice_work);
+
+ mutex_init(&imxdi->write_mutex);
+
+ imxdi->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(imxdi->clk))
+ return PTR_ERR(imxdi->clk);
+ clk_enable(imxdi->clk);
+
+ /*
+ * Initialize dryice hardware
+ */
+
+ /* mask all interrupts */
+ __raw_writel(0, imxdi->ioaddr + DIER);
+
+ rc = devm_request_irq(&pdev->dev, imxdi->irq, dryice_norm_irq,
+ IRQF_SHARED, pdev->name, imxdi);
+ if (rc) {
+ dev_warn(&pdev->dev, "interrupt not available.\n");
+ goto err;
+ }
+
+ /* put dryice into valid state */
+ if (__raw_readl(imxdi->ioaddr + DSR) & DSR_NVF) {
+ rc = di_write_wait(imxdi, DSR_NVF | DSR_SVF, DSR);
+ if (rc)
+ goto err;
+ }
+
+ /* initialize alarm */
+ rc = di_write_wait(imxdi, DCAMR_UNSET, DCAMR);
+ if (rc)
+ goto err;
+ rc = di_write_wait(imxdi, 0, DCALR);
+ if (rc)
+ goto err;
+
+ /* clear alarm flag */
+ if (__raw_readl(imxdi->ioaddr + DSR) & DSR_CAF) {
+ rc = di_write_wait(imxdi, DSR_CAF, DSR);
+ if (rc)
+ goto err;
+ }
+
+ /* the timer won't count if it has never been written to */
+ if (__raw_readl(imxdi->ioaddr + DTCMR) == 0) {
+ rc = di_write_wait(imxdi, 0, DTCMR);
+ if (rc)
+ goto err;
+ }
+
+ /* start keeping time */
+ if (!(__raw_readl(imxdi->ioaddr + DCR) & DCR_TCE)) {
+ rc = di_write_wait(imxdi,
+ __raw_readl(imxdi->ioaddr + DCR) | DCR_TCE,
+ DCR);
+ if (rc)
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, imxdi);
+ imxdi->rtc = rtc_device_register(pdev->name, &pdev->dev,
+ &dryice_rtc_ops, THIS_MODULE);
+ if (IS_ERR(imxdi->rtc)) {
+ rc = PTR_ERR(imxdi->rtc);
+ goto err;
+ }
+
+ return 0;
+
+err:
+ clk_disable(imxdi->clk);
+ clk_put(imxdi->clk);
+
+ return rc;
+}
+
+static int __devexit dryice_rtc_remove(struct platform_device *pdev)
+{
+ struct imxdi_dev *imxdi = platform_get_drvdata(pdev);
+
+ flush_work(&imxdi->work);
+
+ /* mask all interrupts */
+ __raw_writel(0, imxdi->ioaddr + DIER);
+
+ rtc_device_unregister(imxdi->rtc);
+
+ clk_disable(imxdi->clk);
+ clk_put(imxdi->clk);
+
+ return 0;
+}
+
+static struct platform_driver dryice_rtc_driver = {
+ .driver = {
+ .name = "imxdi_rtc",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(dryice_rtc_remove),
+};
+
+static int __init dryice_rtc_init(void)
+{
+ return platform_driver_probe(&dryice_rtc_driver, dryice_rtc_probe);
+}
+
+static void __exit dryice_rtc_exit(void)
+{
+ platform_driver_unregister(&dryice_rtc_driver);
+}
+
+module_init(dryice_rtc_init);
+module_exit(dryice_rtc_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
+MODULE_DESCRIPTION("IMX DryIce Realtime Clock Driver (RTC)");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
new file mode 100644
index 000000000000..ddbc797ea6cd
--- /dev/null
+++ b/drivers/rtc/rtc-isl12022.c
@@ -0,0 +1,327 @@
+/*
+ * An I2C driver for the Intersil ISL 12022
+ *
+ * Author: Roman Fietze <roman.fietze@telemotive.de>
+ *
+ * Based on the Philips PCF8563 RTC
+ * by Alessandro Zummo <a.zummo@towertech.it>.
+ *
+ * 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.
+ */
+
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+
+#define DRV_VERSION "0.1"
+
+/* ISL register offsets */
+#define ISL12022_REG_SC 0x00
+#define ISL12022_REG_MN 0x01
+#define ISL12022_REG_HR 0x02
+#define ISL12022_REG_DT 0x03
+#define ISL12022_REG_MO 0x04
+#define ISL12022_REG_YR 0x05
+#define ISL12022_REG_DW 0x06
+
+#define ISL12022_REG_SR 0x07
+#define ISL12022_REG_INT 0x08
+
+/* ISL register bits */
+#define ISL12022_HR_MIL (1 << 7) /* military or 24 hour time */
+
+#define ISL12022_SR_LBAT85 (1 << 2)
+#define ISL12022_SR_LBAT75 (1 << 1)
+
+#define ISL12022_INT_WRTC (1 << 6)
+
+
+static struct i2c_driver isl12022_driver;
+
+struct isl12022 {
+ struct rtc_device *rtc;
+
+ bool write_enabled; /* true if write enable is set */
+};
+
+
+static int isl12022_read_regs(struct i2c_client *client, uint8_t reg,
+ uint8_t *data, size_t n)
+{
+ struct i2c_msg msgs[] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = data
+ }, /* setup read ptr */
+ {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = n,
+ .buf = data
+ }
+ };
+
+ int ret;
+
+ data[0] = reg;
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs)) {
+ dev_err(&client->dev, "%s: read error, ret=%d\n",
+ __func__, ret);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+
+static int isl12022_write_reg(struct i2c_client *client,
+ uint8_t reg, uint8_t val)
+{
+ uint8_t data[2] = { reg, val };
+ int err;
+
+ err = i2c_master_send(client, data, sizeof(data));
+ if (err != sizeof(data)) {
+ dev_err(&client->dev,
+ "%s: err=%d addr=%02x, data=%02x\n",
+ __func__, err, data[0], data[1]);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+
+/*
+ * In the routines that deal directly with the isl12022 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
+ */
+static int isl12022_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+ uint8_t buf[ISL12022_REG_INT + 1];
+ int ret;
+
+ ret = isl12022_read_regs(client, ISL12022_REG_SC, buf, sizeof(buf));
+ if (ret)
+ return ret;
+
+ if (buf[ISL12022_REG_SR] & (ISL12022_SR_LBAT85 | ISL12022_SR_LBAT75)) {
+ dev_warn(&client->dev,
+ "voltage dropped below %u%%, "
+ "date and time is not reliable.\n",
+ buf[ISL12022_REG_SR] & ISL12022_SR_LBAT85 ? 85 : 75);
+ }
+
+ dev_dbg(&client->dev,
+ "%s: raw data is sec=%02x, min=%02x, hr=%02x, "
+ "mday=%02x, mon=%02x, year=%02x, wday=%02x, "
+ "sr=%02x, int=%02x",
+ __func__,
+ buf[ISL12022_REG_SC],
+ buf[ISL12022_REG_MN],
+ buf[ISL12022_REG_HR],
+ buf[ISL12022_REG_DT],
+ buf[ISL12022_REG_MO],
+ buf[ISL12022_REG_YR],
+ buf[ISL12022_REG_DW],
+ buf[ISL12022_REG_SR],
+ buf[ISL12022_REG_INT]);
+
+ tm->tm_sec = bcd2bin(buf[ISL12022_REG_SC] & 0x7F);
+ tm->tm_min = bcd2bin(buf[ISL12022_REG_MN] & 0x7F);
+ tm->tm_hour = bcd2bin(buf[ISL12022_REG_HR] & 0x3F);
+ tm->tm_mday = bcd2bin(buf[ISL12022_REG_DT] & 0x3F);
+ tm->tm_wday = buf[ISL12022_REG_DW] & 0x07;
+ tm->tm_mon = bcd2bin(buf[ISL12022_REG_MO] & 0x1F) - 1;
+ tm->tm_year = bcd2bin(buf[ISL12022_REG_YR]) + 100;
+
+ dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
+ "mday=%d, mon=%d, year=%d, wday=%d\n",
+ __func__,
+ tm->tm_sec, tm->tm_min, tm->tm_hour,
+ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+ /* The clock can give out invalid datetime, but we cannot return
+ * -EINVAL otherwise hwclock will refuse to set the time on bootup. */
+ if (rtc_valid_tm(tm) < 0)
+ dev_err(&client->dev, "retrieved date and time is invalid.\n");
+
+ return 0;
+}
+
+static int isl12022_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+ struct isl12022 *isl12022 = i2c_get_clientdata(client);
+ size_t i;
+ int ret;
+ uint8_t buf[ISL12022_REG_DW + 1];
+
+ dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
+ "mday=%d, mon=%d, year=%d, wday=%d\n",
+ __func__,
+ tm->tm_sec, tm->tm_min, tm->tm_hour,
+ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+ if (!isl12022->write_enabled) {
+
+ ret = isl12022_read_regs(client, ISL12022_REG_INT, buf, 1);
+ if (ret)
+ return ret;
+
+ /* Check if WRTC (write rtc enable) is set factory default is
+ * 0 (not set) */
+ if (!(buf[0] & ISL12022_INT_WRTC)) {
+ dev_info(&client->dev,
+ "init write enable and 24 hour format\n");
+
+ /* Set the write enable bit. */
+ ret = isl12022_write_reg(client,
+ ISL12022_REG_INT,
+ buf[0] | ISL12022_INT_WRTC);
+ if (ret)
+ return ret;
+
+ /* Write to any RTC register to start RTC, we use the
+ * HR register, setting the MIL bit to use the 24 hour
+ * format. */
+ ret = isl12022_read_regs(client, ISL12022_REG_HR,
+ buf, 1);
+ if (ret)
+ return ret;
+
+ ret = isl12022_write_reg(client,
+ ISL12022_REG_HR,
+ buf[0] | ISL12022_HR_MIL);
+ if (ret)
+ return ret;
+ }
+
+ isl12022->write_enabled = 1;
+ }
+
+ /* hours, minutes and seconds */
+ buf[ISL12022_REG_SC] = bin2bcd(tm->tm_sec);
+ buf[ISL12022_REG_MN] = bin2bcd(tm->tm_min);
+ buf[ISL12022_REG_HR] = bin2bcd(tm->tm_hour) | ISL12022_HR_MIL;
+
+ buf[ISL12022_REG_DT] = bin2bcd(tm->tm_mday);
+
+ /* month, 1 - 12 */
+ buf[ISL12022_REG_MO] = bin2bcd(tm->tm_mon + 1);
+
+ /* year and century */
+ buf[ISL12022_REG_YR] = bin2bcd(tm->tm_year % 100);
+
+ buf[ISL12022_REG_DW] = tm->tm_wday & 0x07;
+
+ /* write register's data */
+ for (i = 0; i < ARRAY_SIZE(buf); i++) {
+ ret = isl12022_write_reg(client, ISL12022_REG_SC + i,
+ buf[ISL12022_REG_SC + i]);
+ if (ret)
+ return -EIO;
+ };
+
+ return 0;
+}
+
+static int isl12022_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ return isl12022_get_datetime(to_i2c_client(dev), tm);
+}
+
+static int isl12022_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ return isl12022_set_datetime(to_i2c_client(dev), tm);
+}
+
+static const struct rtc_class_ops isl12022_rtc_ops = {
+ .read_time = isl12022_rtc_read_time,
+ .set_time = isl12022_rtc_set_time,
+};
+
+static int isl12022_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct isl12022 *isl12022;
+
+ int ret = 0;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -ENODEV;
+
+ isl12022 = kzalloc(sizeof(struct isl12022), GFP_KERNEL);
+ if (!isl12022)
+ return -ENOMEM;
+
+ dev_dbg(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+
+ i2c_set_clientdata(client, isl12022);
+
+ isl12022->rtc = rtc_device_register(isl12022_driver.driver.name,
+ &client->dev,
+ &isl12022_rtc_ops,
+ THIS_MODULE);
+
+ if (IS_ERR(isl12022->rtc)) {
+ ret = PTR_ERR(isl12022->rtc);
+ goto exit_kfree;
+ }
+
+ return 0;
+
+exit_kfree:
+ kfree(isl12022);
+
+ return ret;
+}
+
+static int isl12022_remove(struct i2c_client *client)
+{
+ struct isl12022 *isl12022 = i2c_get_clientdata(client);
+
+ rtc_device_unregister(isl12022->rtc);
+ kfree(isl12022);
+
+ return 0;
+}
+
+static const struct i2c_device_id isl12022_id[] = {
+ { "isl12022", 0 },
+ { "rtc8564", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, isl12022_id);
+
+static struct i2c_driver isl12022_driver = {
+ .driver = {
+ .name = "rtc-isl12022",
+ },
+ .probe = isl12022_probe,
+ .remove = isl12022_remove,
+ .id_table = isl12022_id,
+};
+
+static int __init isl12022_init(void)
+{
+ return i2c_add_driver(&isl12022_driver);
+}
+
+static void __exit isl12022_exit(void)
+{
+ i2c_del_driver(&isl12022_driver);
+}
+
+module_init(isl12022_init);
+module_exit(isl12022_exit);
+
+MODULE_AUTHOR("roman.fietze@telemotive.de");
+MODULE_DESCRIPTION("ISL 12022 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 6dc4e6241418..66377f3e28b8 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -121,7 +121,7 @@ static int m41t80_get_datetime(struct i2c_client *client,
/* assume 20YY not 19YY, and ignore the Century Bit */
tm->tm_year = bcd2bin(buf[M41T80_REG_YEAR]) + 100;
- return 0;
+ return rtc_valid_tm(tm);
}
/* Sets the given date and time to the real time clock. */
@@ -364,7 +364,7 @@ static int m41t80_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *t)
t->time.tm_isdst = -1;
t->enabled = !!(reg[M41T80_REG_ALARM_MON] & M41T80_ALMON_AFE);
t->pending = !!(reg[M41T80_REG_FLAGS] & M41T80_FLAGS_AF);
- return 0;
+ return rtc_valid_tm(t);
}
static struct rtc_class_ops m41t80_rtc_ops = {
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index be8359fdb65a..a99a0b554eb8 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -105,7 +105,7 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
dev_dbg(dev, "RTC read time %04d-%02d-%02d %02d/%02d/%02d\n",
tm->tm_year + 1900, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
- return 0;
+ return rtc_valid_tm(tm);
}
static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
@@ -196,7 +196,7 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
dev_dbg(dev, "RTC read alarm time %04d-%02d-%02d %02d/%02d/%02d\n",
tm->tm_year + 1900, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
- return 0;
+ return rtc_valid_tm(tm);
}
/*
@@ -506,7 +506,6 @@ out:
free_irq(m48t59->irq, &pdev->dev);
if (m48t59->ioaddr)
iounmap(m48t59->ioaddr);
- if (m48t59)
kfree(m48t59);
return ret;
}
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 7c045cffa9ff..f981287d582b 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -77,7 +77,7 @@ static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
if (ops->readbyte(M48T86_REG_HOUR) & 0x80)
tm->tm_hour += 12;
- return 0;
+ return rtc_valid_tm(tm);
}
static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c
index a4f6665ab3c5..486142c2637a 100644
--- a/drivers/rtc/rtc-max6900.c
+++ b/drivers/rtc/rtc-max6900.c
@@ -159,7 +159,7 @@ static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
bcd2bin(regs[MAX6900_REG_CENTURY]) * 100 - 1900;
tm->tm_wday = bcd2bin(regs[MAX6900_REG_DW]);
- return 0;
+ return rtc_valid_tm(tm);
}
static int max6900_i2c_clear_write_protect(struct i2c_client *client)
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 25ec921db07c..0b06c1e03fd5 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -83,12 +83,6 @@ struct rtc_plat_data {
void __iomem *ioaddr;
int irq;
struct clk *clk;
- unsigned int irqen;
- int alrm_sec;
- int alrm_min;
- int alrm_hour;
- int alrm_mday;
- struct timespec mxc_rtc_delta;
struct rtc_time g_rtc_alarm;
};
diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index a351bd5d8176..62de66af0a68 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -85,25 +85,24 @@ static irqreturn_t nuc900_rtc_interrupt(int irq, void *_rtc)
static int *check_rtc_access_enable(struct nuc900_rtc *nuc900_rtc)
{
- unsigned int i;
+ unsigned int timeout = 0x1000;
__raw_writel(INIRRESET, nuc900_rtc->rtc_reg + REG_RTC_INIR);
mdelay(10);
__raw_writel(AERPOWERON, nuc900_rtc->rtc_reg + REG_RTC_AER);
- for (i = 0; i < 1000; i++) {
- if (__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB)
- return 0;
- }
+ while (!(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB)
+ && timeout--)
+ mdelay(1);
- if ((__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB) == 0x0)
- return ERR_PTR(-ENODEV);
+ if (!timeout)
+ return ERR_PTR(-EPERM);
- return ERR_PTR(-EPERM);
+ return 0;
}
-static void nuc900_rtc_bcd2bin(unsigned int timereg,
+static int nuc900_rtc_bcd2bin(unsigned int timereg,
unsigned int calreg, struct rtc_time *tm)
{
tm->tm_mday = bcd2bin(calreg >> 0);
@@ -114,15 +113,21 @@ static void nuc900_rtc_bcd2bin(unsigned int timereg,
tm->tm_min = bcd2bin(timereg >> 8);
tm->tm_hour = bcd2bin(timereg >> 16);
- rtc_valid_tm(tm);
+ return rtc_valid_tm(tm);
}
-static void nuc900_rtc_bin2bcd(struct rtc_time *settm,
+static void nuc900_rtc_bin2bcd(struct device *dev, struct rtc_time *settm,
struct nuc900_bcd_time *gettm)
{
gettm->bcd_mday = bin2bcd(settm->tm_mday) << 0;
gettm->bcd_mon = bin2bcd(settm->tm_mon) << 8;
- gettm->bcd_year = bin2bcd(settm->tm_year - 100) << 16;
+
+ if (settm->tm_year < 100) {
+ dev_warn(dev, "The year will be between 1970-1999, right?\n");
+ gettm->bcd_year = bin2bcd(settm->tm_year) << 16;
+ } else {
+ gettm->bcd_year = bin2bcd(settm->tm_year - 100) << 16;
+ }
gettm->bcd_sec = bin2bcd(settm->tm_sec) << 0;
gettm->bcd_min = bin2bcd(settm->tm_min) << 8;
@@ -165,9 +170,7 @@ static int nuc900_rtc_read_time(struct device *dev, struct rtc_time *tm)
timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TLR);
clrval = __raw_readl(rtc->rtc_reg + REG_RTC_CLR);
- nuc900_rtc_bcd2bin(timeval, clrval, tm);
-
- return 0;
+ return nuc900_rtc_bcd2bin(timeval, clrval, tm);
}
static int nuc900_rtc_set_time(struct device *dev, struct rtc_time *tm)
@@ -177,7 +180,7 @@ static int nuc900_rtc_set_time(struct device *dev, struct rtc_time *tm)
unsigned long val;
int *err;
- nuc900_rtc_bin2bcd(tm, &gettm);
+ nuc900_rtc_bin2bcd(dev, tm, &gettm);
err = check_rtc_access_enable(rtc);
if (IS_ERR(err))
@@ -200,9 +203,7 @@ static int nuc900_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TAR);
carval = __raw_readl(rtc->rtc_reg + REG_RTC_CAR);
- nuc900_rtc_bcd2bin(timeval, carval, &alrm->time);
-
- return 0;
+ return nuc900_rtc_bcd2bin(timeval, carval, &alrm->time);
}
static int nuc900_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -212,7 +213,7 @@ static int nuc900_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
unsigned long val;
int *err;
- nuc900_rtc_bin2bcd(&alrm->time, &tm);
+ nuc900_rtc_bin2bcd(dev, &alrm->time, &tm);
err = check_rtc_access_enable(rtc);
if (IS_ERR(err))
@@ -268,29 +269,30 @@ static int __devinit nuc900_rtc_probe(struct platform_device *pdev)
goto fail2;
}
- nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
- if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
- IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) {
- dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
- err = -EBUSY;
- goto fail3;
- }
+ platform_set_drvdata(pdev, nuc900_rtc);
nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
&nuc900_rtc_ops, THIS_MODULE);
if (IS_ERR(nuc900_rtc->rtcdev)) {
dev_err(&pdev->dev, "rtc device register faild\n");
err = PTR_ERR(nuc900_rtc->rtcdev);
- goto fail4;
+ goto fail3;
}
- platform_set_drvdata(pdev, nuc900_rtc);
__raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24,
nuc900_rtc->rtc_reg + REG_RTC_TSSR);
+ nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
+ if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
+ IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) {
+ dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
+ err = -EBUSY;
+ goto fail4;
+ }
+
return 0;
-fail4: free_irq(nuc900_rtc->irq_num, nuc900_rtc);
+fail4: rtc_device_unregister(nuc900_rtc->rtcdev);
fail3: iounmap(nuc900_rtc->rtc_reg);
fail2: release_mem_region(res->start, resource_size(res));
fail1: kfree(nuc900_rtc);
@@ -302,8 +304,8 @@ static int __devexit nuc900_rtc_remove(struct platform_device *pdev)
struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev);
struct resource *res;
- rtc_device_unregister(nuc900_rtc->rtcdev);
free_irq(nuc900_rtc->irq_num, nuc900_rtc);
+ rtc_device_unregister(nuc900_rtc->rtcdev);
iounmap(nuc900_rtc->rtc_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 1af42b4a6f59..b42c0c679266 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -172,14 +172,6 @@ static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
return 0;
}
-struct pcf8563_limit
-{
- unsigned char reg;
- unsigned char mask;
- unsigned char min;
- unsigned char max;
-};
-
static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
return pcf8563_get_datetime(to_i2c_client(dev), tm);
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 71bbefc3544e..6c418fe7f288 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -23,7 +23,6 @@
#include <linux/io.h>
#include <linux/bcd.h>
#include <linux/delay.h>
-#include <linux/version.h>
#include <linux/slab.h>
/*
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index e9c6fa035989..29e867a1aaa8 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -87,7 +87,6 @@ struct pxa_rtc {
int irq_Alrm;
struct rtc_device *rtc;
spinlock_t lock; /* Protects this structure */
- struct rtc_time rtc_alarm;
};
static u32 ryxr_calc(struct rtc_time *tm)
@@ -236,32 +235,34 @@ static int pxa_periodic_irq_set_state(struct device *dev, int enabled)
return 0;
}
-static int pxa_rtc_ioctl(struct device *dev, unsigned int cmd,
- unsigned long arg)
+static int pxa_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
- int ret = 0;
spin_lock_irq(&pxa_rtc->lock);
- switch (cmd) {
- case RTC_AIE_OFF:
- rtsr_clear_bits(pxa_rtc, RTSR_RDALE1);
- break;
- case RTC_AIE_ON:
+
+ if (enabled)
rtsr_set_bits(pxa_rtc, RTSR_RDALE1);
- break;
- case RTC_UIE_OFF:
- rtsr_clear_bits(pxa_rtc, RTSR_HZE);
- break;
- case RTC_UIE_ON:
+ else
+ rtsr_clear_bits(pxa_rtc, RTSR_RDALE1);
+
+ spin_unlock_irq(&pxa_rtc->lock);
+ return 0;
+}
+
+static int pxa_update_irq_enable(struct device *dev, unsigned int enabled)
+{
+ struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
+
+ spin_lock_irq(&pxa_rtc->lock);
+
+ if (enabled)
rtsr_set_bits(pxa_rtc, RTSR_HZE);
- break;
- default:
- ret = -ENOIOCTLCMD;
- }
+ else
+ rtsr_clear_bits(pxa_rtc, RTSR_HZE);
spin_unlock_irq(&pxa_rtc->lock);
- return ret;
+ return 0;
}
static int pxa_rtc_read_time(struct device *dev, struct rtc_time *tm)
@@ -340,11 +341,12 @@ static int pxa_rtc_proc(struct device *dev, struct seq_file *seq)
static const struct rtc_class_ops pxa_rtc_ops = {
.open = pxa_rtc_open,
.release = pxa_rtc_release,
- .ioctl = pxa_rtc_ioctl,
.read_time = pxa_rtc_read_time,
.set_time = pxa_rtc_set_time,
.read_alarm = pxa_rtc_read_alarm,
.set_alarm = pxa_rtc_set_alarm,
+ .alarm_irq_enable = pxa_alarm_irq_enable,
+ .update_irq_enable = pxa_update_irq_enable,
.proc = pxa_rtc_proc,
.irq_set_state = pxa_periodic_irq_set_state,
.irq_set_freq = pxa_periodic_irq_set_freq,
diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c
index a95f733bb15a..36eb66184461 100644
--- a/drivers/rtc/rtc-rp5c01.c
+++ b/drivers/rtc/rtc-rp5c01.c
@@ -63,6 +63,8 @@ enum {
struct rp5c01_priv {
u32 __iomem *regs;
struct rtc_device *rtc;
+ spinlock_t lock; /* against concurrent RTC/NVRAM access */
+ struct bin_attribute nvram_attr;
};
static inline unsigned int rp5c01_read(struct rp5c01_priv *priv,
@@ -92,6 +94,7 @@ static int rp5c01_read_time(struct device *dev, struct rtc_time *tm)
{
struct rp5c01_priv *priv = dev_get_drvdata(dev);
+ spin_lock_irq(&priv->lock);
rp5c01_lock(priv);
tm->tm_sec = rp5c01_read(priv, RP5C01_10_SECOND) * 10 +
@@ -111,6 +114,7 @@ static int rp5c01_read_time(struct device *dev, struct rtc_time *tm)
tm->tm_year += 100;
rp5c01_unlock(priv);
+ spin_unlock_irq(&priv->lock);
return rtc_valid_tm(tm);
}
@@ -119,6 +123,7 @@ static int rp5c01_set_time(struct device *dev, struct rtc_time *tm)
{
struct rp5c01_priv *priv = dev_get_drvdata(dev);
+ spin_lock_irq(&priv->lock);
rp5c01_lock(priv);
rp5c01_write(priv, tm->tm_sec / 10, RP5C01_10_SECOND);
@@ -139,6 +144,7 @@ static int rp5c01_set_time(struct device *dev, struct rtc_time *tm)
rp5c01_write(priv, tm->tm_year % 10, RP5C01_1_YEAR);
rp5c01_unlock(priv);
+ spin_unlock_irq(&priv->lock);
return 0;
}
@@ -147,6 +153,72 @@ static const struct rtc_class_ops rp5c01_rtc_ops = {
.set_time = rp5c01_set_time,
};
+
+/*
+ * The NVRAM is organized as 2 blocks of 13 nibbles of 4 bits.
+ * We provide access to them like AmigaOS does: the high nibble of each 8-bit
+ * byte is stored in BLOCK10, the low nibble in BLOCK11.
+ */
+
+static ssize_t rp5c01_nvram_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct rp5c01_priv *priv = dev_get_drvdata(dev);
+ ssize_t count;
+
+ spin_lock_irq(&priv->lock);
+
+ for (count = 0; size > 0 && pos < RP5C01_MODE; count++, size--) {
+ u8 data;
+
+ rp5c01_write(priv,
+ RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
+ RP5C01_MODE);
+ data = rp5c01_read(priv, pos) << 4;
+ rp5c01_write(priv,
+ RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
+ RP5C01_MODE);
+ data |= rp5c01_read(priv, pos++);
+ rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
+ RP5C01_MODE);
+ *buf++ = data;
+ }
+
+ spin_unlock_irq(&priv->lock);
+ return count;
+}
+
+static ssize_t rp5c01_nvram_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct rp5c01_priv *priv = dev_get_drvdata(dev);
+ ssize_t count;
+
+ spin_lock_irq(&priv->lock);
+
+ for (count = 0; size > 0 && pos < RP5C01_MODE; count++, size--) {
+ u8 data = *buf++;
+
+ rp5c01_write(priv,
+ RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
+ RP5C01_MODE);
+ rp5c01_write(priv, data >> 4, pos);
+ rp5c01_write(priv,
+ RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
+ RP5C01_MODE);
+ rp5c01_write(priv, data & 0xf, pos++);
+ rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
+ RP5C01_MODE);
+ }
+
+ spin_unlock_irq(&priv->lock);
+ return count;
+}
+
static int __init rp5c01_rtc_probe(struct platform_device *dev)
{
struct resource *res;
@@ -168,6 +240,15 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
goto out_free_priv;
}
+ sysfs_bin_attr_init(&priv->nvram_attr);
+ priv->nvram_attr.attr.name = "nvram";
+ priv->nvram_attr.attr.mode = S_IRUGO | S_IWUSR;
+ priv->nvram_attr.read = rp5c01_nvram_read;
+ priv->nvram_attr.write = rp5c01_nvram_write;
+ priv->nvram_attr.size = RP5C01_MODE;
+
+ spin_lock_init(&priv->lock);
+
rtc = rtc_device_register("rtc-rp5c01", &dev->dev, &rp5c01_rtc_ops,
THIS_MODULE);
if (IS_ERR(rtc)) {
@@ -177,8 +258,15 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
priv->rtc = rtc;
platform_set_drvdata(dev, priv);
+
+ error = sysfs_create_bin_file(&dev->dev.kobj, &priv->nvram_attr);
+ if (error)
+ goto out_unregister;
+
return 0;
+out_unregister:
+ rtc_device_unregister(rtc);
out_unmap:
iounmap(priv->regs);
out_free_priv:
@@ -190,6 +278,7 @@ static int __exit rp5c01_rtc_remove(struct platform_device *dev)
{
struct rp5c01_priv *priv = platform_get_drvdata(dev);
+ sysfs_remove_bin_file(&dev->dev.kobj, &priv->nvram_attr);
rtc_device_unregister(priv->rtc);
iounmap(priv->regs);
kfree(priv);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 01:12:25 +0100