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-rw-r--r--drivers/rtc/Kconfig29
-rw-r--r--drivers/rtc/Makefile3
-rw-r--r--drivers/rtc/interface.c2
-rw-r--r--drivers/rtc/rtc-cmos.c2
-rw-r--r--drivers/rtc/rtc-ds1390.c220
-rw-r--r--drivers/rtc/rtc-rx8581.c281
-rw-r--r--drivers/rtc/rtc-wm8350.c514
7 files changed, 1049 insertions, 2 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 8abbb2020af9..123092d8a984 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -277,6 +277,14 @@ config RTC_DRV_FM3130
This driver can also be built as a module. If so the module
will be called rtc-fm3130.
+config RTC_DRV_RX8581
+ tristate "Epson RX-8581"
+ help
+ If you say yes here you will get support for the Epson RX-8581.
+
+ This driver can also be built as a module. If so the module
+ will be called rtc-rx8581.
+
endif # I2C
comment "SPI RTC drivers"
@@ -302,6 +310,17 @@ config RTC_DRV_DS1305
This driver can also be built as a module. If so, the module
will be called rtc-ds1305.
+config RTC_DRV_DS1390
+ tristate "Dallas/Maxim DS1390/93/94"
+ help
+ If you say yes here you get support for the DS1390/93/94 chips.
+
+ This driver only supports the RTC feature, and not other chip
+ features such as alarms and trickle charging.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-ds1390.
+
config RTC_DRV_MAX6902
tristate "Maxim MAX6902"
help
@@ -468,6 +487,16 @@ config RTC_DRV_V3020
This driver can also be built as a module. If so, the module
will be called rtc-v3020.
+config RTC_DRV_WM8350
+ tristate "Wolfson Microelectronics WM8350 RTC"
+ depends on MFD_WM8350
+ help
+ If you say yes here you will get support for the RTC subsystem
+ of the Wolfson Microelectronics WM8350.
+
+ This driver can also be built as a module. If so, the module
+ will be called "rtc-wm8350".
+
comment "on-CPU RTC drivers"
config RTC_DRV_OMAP
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index e9e8474cc8fe..6e79c912bf9e 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o
obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o
obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o
obj-$(CONFIG_RTC_DRV_DS1374) += rtc-ds1374.o
+obj-$(CONFIG_RTC_DRV_DS1390) += rtc-ds1390.o
obj-$(CONFIG_RTC_DRV_DS1511) += rtc-ds1511.o
obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o
obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
@@ -57,6 +58,7 @@ obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o
obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
+obj-$(CONFIG_RTC_DRV_RX8581) += rtc-rx8581.o
obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o
obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o
obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o
@@ -66,4 +68,5 @@ obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl4030.o
obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
+obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 7af60b98d8a4..a04c1b6b1575 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -271,7 +271,7 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");
do {
alarm->time.tm_year++;
- } while (!rtc_valid_tm(&alarm->time));
+ } while (rtc_valid_tm(&alarm->time) != 0);
break;
default:
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 5549231179a2..6cf8e282338f 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -794,7 +794,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
goto cleanup2;
}
- pr_info("%s: alarms up to one %s%s, %zd bytes nvram, %s irqs\n",
+ pr_info("%s: alarms up to one %s%s, %zd bytes nvram%s\n",
cmos_rtc.rtc->dev.bus_id,
is_valid_irq(rtc_irq)
? (cmos_rtc.mon_alrm
diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c
new file mode 100644
index 000000000000..599e976bf014
--- /dev/null
+++ b/drivers/rtc/rtc-ds1390.c
@@ -0,0 +1,220 @@
+/*
+ * rtc-ds1390.c -- driver for DS1390/93/94
+ *
+ * Copyright (C) 2008 Mercury IMC Ltd
+ * Written by Mark Jackson <mpfj@mimc.co.uk>
+ *
+ * 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.
+ *
+ * NOTE : Currently this driver only supports the bare minimum for read
+ * and write the RTC. The extra features provided by the chip family
+ * (alarms, trickle charger, different control registers) are unavailable.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/spi/spi.h>
+#include <linux/bcd.h>
+
+#define DS1390_REG_100THS 0x00
+#define DS1390_REG_SECONDS 0x01
+#define DS1390_REG_MINUTES 0x02
+#define DS1390_REG_HOURS 0x03
+#define DS1390_REG_DAY 0x04
+#define DS1390_REG_DATE 0x05
+#define DS1390_REG_MONTH_CENT 0x06
+#define DS1390_REG_YEAR 0x07
+
+#define DS1390_REG_ALARM_100THS 0x08
+#define DS1390_REG_ALARM_SECONDS 0x09
+#define DS1390_REG_ALARM_MINUTES 0x0A
+#define DS1390_REG_ALARM_HOURS 0x0B
+#define DS1390_REG_ALARM_DAY_DATE 0x0C
+
+#define DS1390_REG_CONTROL 0x0D
+#define DS1390_REG_STATUS 0x0E
+#define DS1390_REG_TRICKLE 0x0F
+
+struct ds1390 {
+ struct rtc_device *rtc;
+ u8 txrx_buf[9]; /* cmd + 8 registers */
+};
+
+static void ds1390_set_reg(struct device *dev, unsigned char address,
+ unsigned char data)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct ds1390 *chip = dev_get_drvdata(dev);
+
+ /* Set MSB to indicate write */
+ chip->txrx_buf[0] = address | 0x80;
+ chip->txrx_buf[1] = data;
+
+ /* do the i/o */
+ spi_write_then_read(spi, chip->txrx_buf, 2, NULL, 0);
+}
+
+static int ds1390_get_reg(struct device *dev, unsigned char address,
+ unsigned char *data)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct ds1390 *chip = dev_get_drvdata(dev);
+ int status;
+
+ if (!data)
+ return -EINVAL;
+
+ /* Clear MSB to indicate read */
+ chip->txrx_buf[0] = address & 0x7f;
+ /* do the i/o */
+ status = spi_write_then_read(spi, chip->txrx_buf, 1, chip->txrx_buf, 1);
+ if (status != 0)
+ return status;
+
+ *data = chip->txrx_buf[1];
+
+ return 0;
+}
+
+static int ds1390_get_datetime(struct device *dev, struct rtc_time *dt)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct ds1390 *chip = dev_get_drvdata(dev);
+ int status;
+
+ /* build the message */
+ chip->txrx_buf[0] = DS1390_REG_SECONDS;
+
+ /* do the i/o */
+ status = spi_write_then_read(spi, chip->txrx_buf, 1, chip->txrx_buf, 8);
+ if (status != 0)
+ return status;
+
+ /* The chip sends data in this order:
+ * Seconds, Minutes, Hours, Day, Date, Month / Century, Year */
+ dt->tm_sec = bcd2bin(chip->txrx_buf[0]);
+ dt->tm_min = bcd2bin(chip->txrx_buf[1]);
+ dt->tm_hour = bcd2bin(chip->txrx_buf[2]);
+ dt->tm_wday = bcd2bin(chip->txrx_buf[3]);
+ dt->tm_mday = bcd2bin(chip->txrx_buf[4]);
+ /* mask off century bit */
+ dt->tm_mon = bcd2bin(chip->txrx_buf[5] & 0x7f) - 1;
+ /* adjust for century bit */
+ dt->tm_year = bcd2bin(chip->txrx_buf[6]) + ((chip->txrx_buf[5] & 0x80) ? 100 : 0);
+
+ return rtc_valid_tm(dt);
+}
+
+static int ds1390_set_datetime(struct device *dev, struct rtc_time *dt)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct ds1390 *chip = dev_get_drvdata(dev);
+
+ /* build the message */
+ chip->txrx_buf[0] = DS1390_REG_SECONDS | 0x80;
+ chip->txrx_buf[1] = bin2bcd(dt->tm_sec);
+ chip->txrx_buf[2] = bin2bcd(dt->tm_min);
+ chip->txrx_buf[3] = bin2bcd(dt->tm_hour);
+ chip->txrx_buf[4] = bin2bcd(dt->tm_wday);
+ chip->txrx_buf[5] = bin2bcd(dt->tm_mday);
+ chip->txrx_buf[6] = bin2bcd(dt->tm_mon + 1) |
+ ((dt->tm_year > 99) ? 0x80 : 0x00);
+ chip->txrx_buf[7] = bin2bcd(dt->tm_year % 100);
+
+ /* do the i/o */
+ return spi_write_then_read(spi, chip->txrx_buf, 8, NULL, 0);
+}
+
+static int ds1390_read_time(struct device *dev, struct rtc_time *tm)
+{
+ return ds1390_get_datetime(dev, tm);
+}
+
+static int ds1390_set_time(struct device *dev, struct rtc_time *tm)
+{
+ return ds1390_set_datetime(dev, tm);
+}
+
+static const struct rtc_class_ops ds1390_rtc_ops = {
+ .read_time = ds1390_read_time,
+ .set_time = ds1390_set_time,
+};
+
+static int __devinit ds1390_probe(struct spi_device *spi)
+{
+ struct rtc_device *rtc;
+ unsigned char tmp;
+ struct ds1390 *chip;
+ int res;
+
+ printk(KERN_DEBUG "DS1390 SPI RTC driver\n");
+
+ rtc = rtc_device_register("ds1390",
+ &spi->dev, &ds1390_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc)) {
+ printk(KERN_ALERT "RTC : unable to register device\n");
+ return PTR_ERR(rtc);
+ }
+
+ spi->mode = SPI_MODE_3;
+ spi->bits_per_word = 8;
+ spi_setup(spi);
+
+ chip = kzalloc(sizeof *chip, GFP_KERNEL);
+ if (!chip) {
+ printk(KERN_ALERT "RTC : unable to allocate device memory\n");
+ rtc_device_unregister(rtc);
+ return -ENOMEM;
+ }
+ chip->rtc = rtc;
+ dev_set_drvdata(&spi->dev, chip);
+
+ res = ds1390_get_reg(&spi->dev, DS1390_REG_SECONDS, &tmp);
+ if (res) {
+ printk(KERN_ALERT "RTC : unable to read device\n");
+ rtc_device_unregister(rtc);
+ return res;
+ }
+
+ return 0;
+}
+
+static int __devexit ds1390_remove(struct spi_device *spi)
+{
+ struct ds1390 *chip = platform_get_drvdata(spi);
+ struct rtc_device *rtc = chip->rtc;
+
+ if (rtc)
+ rtc_device_unregister(rtc);
+
+ kfree(chip);
+
+ return 0;
+}
+
+static struct spi_driver ds1390_driver = {
+ .driver = {
+ .name = "rtc-ds1390",
+ .owner = THIS_MODULE,
+ },
+ .probe = ds1390_probe,
+ .remove = __devexit_p(ds1390_remove),
+};
+
+static __init int ds1390_init(void)
+{
+ return spi_register_driver(&ds1390_driver);
+}
+module_init(ds1390_init);
+
+static __exit void ds1390_exit(void)
+{
+ spi_unregister_driver(&ds1390_driver);
+}
+module_exit(ds1390_exit);
+
+MODULE_DESCRIPTION("DS1390/93/94 SPI RTC driver");
+MODULE_AUTHOR("Mark Jackson <mpfj@mimc.co.uk>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c
new file mode 100644
index 000000000000..c9522f3bc21c
--- /dev/null
+++ b/drivers/rtc/rtc-rx8581.c
@@ -0,0 +1,281 @@
+/*
+ * An I2C driver for the Epson RX8581 RTC
+ *
+ * Author: Martyn Welch <martyn.welch@gefanuc.com>
+ * Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc.
+ *
+ * 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.
+ *
+ * Based on: rtc-pcf8563.c (An I2C driver for the Philips PCF8563 RTC)
+ * Copyright 2005-06 Tower Technologies
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/log2.h>
+
+#define DRV_VERSION "0.1"
+
+#define RX8581_REG_SC 0x00 /* Second in BCD */
+#define RX8581_REG_MN 0x01 /* Minute in BCD */
+#define RX8581_REG_HR 0x02 /* Hour in BCD */
+#define RX8581_REG_DW 0x03 /* Day of Week */
+#define RX8581_REG_DM 0x04 /* Day of Month in BCD */
+#define RX8581_REG_MO 0x05 /* Month in BCD */
+#define RX8581_REG_YR 0x06 /* Year in BCD */
+#define RX8581_REG_RAM 0x07 /* RAM */
+#define RX8581_REG_AMN 0x08 /* Alarm Min in BCD*/
+#define RX8581_REG_AHR 0x09 /* Alarm Hour in BCD */
+#define RX8581_REG_ADM 0x0A
+#define RX8581_REG_ADW 0x0A
+#define RX8581_REG_TMR0 0x0B
+#define RX8581_REG_TMR1 0x0C
+#define RX8581_REG_EXT 0x0D /* Extension Register */
+#define RX8581_REG_FLAG 0x0E /* Flag Register */
+#define RX8581_REG_CTRL 0x0F /* Control Register */
+
+
+/* Flag Register bit definitions */
+#define RX8581_FLAG_UF 0x20 /* Update */
+#define RX8581_FLAG_TF 0x10 /* Timer */
+#define RX8581_FLAG_AF 0x08 /* Alarm */
+#define RX8581_FLAG_VLF 0x02 /* Voltage Low */
+
+/* Control Register bit definitions */
+#define RX8581_CTRL_UIE 0x20 /* Update Interrupt Enable */
+#define RX8581_CTRL_TIE 0x10 /* Timer Interrupt Enable */
+#define RX8581_CTRL_AIE 0x08 /* Alarm Interrupt Enable */
+#define RX8581_CTRL_STOP 0x02 /* STOP bit */
+#define RX8581_CTRL_RESET 0x01 /* RESET bit */
+
+static struct i2c_driver rx8581_driver;
+
+/*
+ * In the routines that deal directly with the rx8581 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
+ */
+static int rx8581_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+ unsigned char date[7];
+ int data, err;
+
+ /* First we ensure that the "update flag" is not set, we read the
+ * time and date then re-read the "update flag". If the update flag
+ * has been set, we know that the time has changed during the read so
+ * we repeat the whole process again.
+ */
+ data = i2c_smbus_read_byte_data(client, RX8581_REG_FLAG);
+ if (data < 0) {
+ dev_err(&client->dev, "Unable to read device flags\n");
+ return -EIO;
+ }
+
+ do {
+ /* If update flag set, clear it */
+ if (data & RX8581_FLAG_UF) {
+ err = i2c_smbus_write_byte_data(client,
+ RX8581_REG_FLAG, (data & ~RX8581_FLAG_UF));
+ if (err != 0) {
+ dev_err(&client->dev, "Unable to write device "
+ "flags\n");
+ return -EIO;
+ }
+ }
+
+ /* Now read time and date */
+ err = i2c_smbus_read_i2c_block_data(client, RX8581_REG_SC,
+ 7, date);
+ if (err < 0) {
+ dev_err(&client->dev, "Unable to read date\n");
+ return -EIO;
+ }
+
+ /* Check flag register */
+ data = i2c_smbus_read_byte_data(client, RX8581_REG_FLAG);
+ if (data < 0) {
+ dev_err(&client->dev, "Unable to read device flags\n");
+ return -EIO;
+ }
+ } while (data & RX8581_FLAG_UF);
+
+ if (data & RX8581_FLAG_VLF)
+ dev_info(&client->dev,
+ "low voltage detected, date/time is not reliable.\n");
+
+ dev_dbg(&client->dev,
+ "%s: raw data is sec=%02x, min=%02x, hr=%02x, "
+ "wday=%02x, mday=%02x, mon=%02x, year=%02x\n",
+ __func__,
+ date[0], date[1], date[2], date[3], date[4], date[5], date[6]);
+
+ tm->tm_sec = bcd2bin(date[RX8581_REG_SC] & 0x7F);
+ tm->tm_min = bcd2bin(date[RX8581_REG_MN] & 0x7F);
+ tm->tm_hour = bcd2bin(date[RX8581_REG_HR] & 0x3F); /* rtc hr 0-23 */
+ tm->tm_wday = ilog2(date[RX8581_REG_DW] & 0x7F);
+ tm->tm_mday = bcd2bin(date[RX8581_REG_DM] & 0x3F);
+ tm->tm_mon = bcd2bin(date[RX8581_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
+ tm->tm_year = bcd2bin(date[RX8581_REG_YR]);
+ if (tm->tm_year < 70)
+ tm->tm_year += 100; /* assume we are in 1970...2069 */
+
+
+ dev_dbg(&client->dev, "%s: tm is 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);
+
+ err = rtc_valid_tm(tm);
+ if (err < 0)
+ dev_err(&client->dev, "retrieved date/time is not valid.\n");
+
+ return err;
+}
+
+static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+ int data, err;
+ unsigned char buf[7];
+
+ 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);
+
+ /* hours, minutes and seconds */
+ buf[RX8581_REG_SC] = bin2bcd(tm->tm_sec);
+ buf[RX8581_REG_MN] = bin2bcd(tm->tm_min);
+ buf[RX8581_REG_HR] = bin2bcd(tm->tm_hour);
+
+ buf[RX8581_REG_DM] = bin2bcd(tm->tm_mday);
+
+ /* month, 1 - 12 */
+ buf[RX8581_REG_MO] = bin2bcd(tm->tm_mon + 1);
+
+ /* year and century */
+ buf[RX8581_REG_YR] = bin2bcd(tm->tm_year % 100);
+ buf[RX8581_REG_DW] = (0x1 << tm->tm_wday);
+
+ /* Stop the clock */
+ data = i2c_smbus_read_byte_data(client, RX8581_REG_CTRL);
+ if (data < 0) {
+ dev_err(&client->dev, "Unable to read control register\n");
+ return -EIO;
+ }
+
+ err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG,
+ (data | RX8581_CTRL_STOP));
+ if (err < 0) {
+ dev_err(&client->dev, "Unable to write control register\n");
+ return -EIO;
+ }
+
+ /* write register's data */
+ err = i2c_smbus_write_i2c_block_data(client, RX8581_REG_SC, 7, buf);
+ if (err < 0) {
+ dev_err(&client->dev, "Unable to write to date registers\n");
+ return -EIO;
+ }
+
+ /* Restart the clock */
+ data = i2c_smbus_read_byte_data(client, RX8581_REG_CTRL);
+ if (data < 0) {
+ dev_err(&client->dev, "Unable to read control register\n");
+ return -EIO;
+ }
+
+ err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG,
+ (data | ~(RX8581_CTRL_STOP)));
+ if (err != 0) {
+ dev_err(&client->dev, "Unable to write control register\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int rx8581_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ return rx8581_get_datetime(to_i2c_client(dev), tm);
+}
+
+static int rx8581_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ return rx8581_set_datetime(to_i2c_client(dev), tm);
+}
+
+static const struct rtc_class_ops rx8581_rtc_ops = {
+ .read_time = rx8581_rtc_read_time,
+ .set_time = rx8581_rtc_set_time,
+};
+
+static int __devinit rx8581_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct rtc_device *rtc;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -ENODEV;
+
+ dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+
+ rtc = rtc_device_register(rx8581_driver.driver.name,
+ &client->dev, &rx8581_rtc_ops, THIS_MODULE);
+
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
+
+ i2c_set_clientdata(client, rtc);
+
+ return 0;
+}
+
+static int __devexit rx8581_remove(struct i2c_client *client)
+{
+ struct rtc_device *rtc = i2c_get_clientdata(client);
+
+ rtc_device_unregister(rtc);
+
+ return 0;
+}
+
+static const struct i2c_device_id rx8581_id[] = {
+ { "rx8581", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, rx8581_id);
+
+static struct i2c_driver rx8581_driver = {
+ .driver = {
+ .name = "rtc-rx8581",
+ .owner = THIS_MODULE,
+ },
+ .probe = rx8581_probe,
+ .remove = __devexit_p(rx8581_remove),
+ .id_table = rx8581_id,
+};
+
+static int __init rx8581_init(void)
+{
+ return i2c_add_driver(&rx8581_driver);
+}
+
+static void __exit rx8581_exit(void)
+{
+ i2c_del_driver(&rx8581_driver);
+}
+
+MODULE_AUTHOR("Martyn Welch <martyn.welch@gefanuc.com>");
+MODULE_DESCRIPTION("Epson RX-8581 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(rx8581_init);
+module_exit(rx8581_exit);
diff --git a/drivers/rtc/rtc-wm8350.c b/drivers/rtc/rtc-wm8350.c
new file mode 100644
index 000000000000..5c5e3aa91385
--- /dev/null
+++ b/drivers/rtc/rtc-wm8350.c
@@ -0,0 +1,514 @@
+/*
+ * Real Time Clock driver for Wolfson Microelectronics WM8350
+ *
+ * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood
+ * linux@wolfsonmicro.com
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/interrupt.h>
+#include <linux/ioctl.h>
+#include <linux/completion.h>
+#include <linux/mfd/wm8350/rtc.h>
+#include <linux/mfd/wm8350/core.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#define WM8350_SET_ALM_RETRIES 5
+#define WM8350_SET_TIME_RETRIES 5
+#define WM8350_GET_TIME_RETRIES 5
+
+#define to_wm8350_from_rtc_dev(d) container_of(d, struct wm8350, rtc.pdev.dev)
+
+/*
+ * Read current time and date in RTC
+ */
+static int wm8350_rtc_readtime(struct device *dev, struct rtc_time *tm)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(dev);
+ u16 time1[4], time2[4];
+ int retries = WM8350_GET_TIME_RETRIES, ret;
+
+ /*
+ * Read the time twice and compare.
+ * If time1 == time2, then time is valid else retry.
+ */
+ do {
+ ret = wm8350_block_read(wm8350, WM8350_RTC_SECONDS_MINUTES,
+ 4, time1);
+ if (ret < 0)
+ return ret;
+ ret = wm8350_block_read(wm8350, WM8350_RTC_SECONDS_MINUTES,
+ 4, time2);
+ if (ret < 0)
+ return ret;
+
+ if (memcmp(time1, time2, sizeof(time1)) == 0) {
+ tm->tm_sec = time1[0] & WM8350_RTC_SECS_MASK;
+
+ tm->tm_min = (time1[0] & WM8350_RTC_MINS_MASK)
+ >> WM8350_RTC_MINS_SHIFT;
+
+ tm->tm_hour = time1[1] & WM8350_RTC_HRS_MASK;
+
+ tm->tm_wday = ((time1[1] >> WM8350_RTC_DAY_SHIFT)
+ & 0x7) - 1;
+
+ tm->tm_mon = ((time1[2] & WM8350_RTC_MTH_MASK)
+ >> WM8350_RTC_MTH_SHIFT) - 1;
+
+ tm->tm_mday = (time1[2] & WM8350_RTC_DATE_MASK);
+
+ tm->tm_year = ((time1[3] & WM8350_RTC_YHUNDREDS_MASK)
+ >> WM8350_RTC_YHUNDREDS_SHIFT) * 100;
+ tm->tm_year += time1[3] & WM8350_RTC_YUNITS_MASK;
+
+ tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon,
+ tm->tm_year);
+ tm->tm_year -= 1900;
+
+ dev_dbg(dev, "Read (%d left): %04x %04x %04x %04x\n",
+ retries,
+ time1[0], time1[1], time1[2], time1[3]);
+
+ return 0;
+ }
+ } while (retries--);
+
+ dev_err(dev, "timed out reading RTC time\n");
+ return -EIO;
+}
+
+/*
+ * Set current time and date in RTC
+ */
+static int wm8350_rtc_settime(struct device *dev, struct rtc_time *tm)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(dev);
+ u16 time[4];
+ u16 rtc_ctrl;
+ int ret, retries = WM8350_SET_TIME_RETRIES;
+
+ time[0] = tm->tm_sec;
+ time[0] |= tm->tm_min << WM8350_RTC_MINS_SHIFT;
+ time[1] = tm->tm_hour;
+ time[1] |= (tm->tm_wday + 1) << WM8350_RTC_DAY_SHIFT;
+ time[2] = tm->tm_mday;
+ time[2] |= (tm->tm_mon + 1) << WM8350_RTC_MTH_SHIFT;
+ time[3] = ((tm->tm_year + 1900) / 100) << WM8350_RTC_YHUNDREDS_SHIFT;
+ time[3] |= (tm->tm_year + 1900) % 100;
+
+ dev_dbg(dev, "Setting: %04x %04x %04x %04x\n",
+ time[0], time[1], time[2], time[3]);
+
+ /* Set RTC_SET to stop the clock */
+ ret = wm8350_set_bits(wm8350, WM8350_RTC_TIME_CONTROL, WM8350_RTC_SET);
+ if (ret < 0)
+ return ret;
+
+ /* Wait until confirmation of stopping */
+ do {
+ rtc_ctrl = wm8350_reg_read(wm8350, WM8350_RTC_TIME_CONTROL);
+ schedule_timeout_uninterruptible(msecs_to_jiffies(1));
+ } while (retries-- && !(rtc_ctrl & WM8350_RTC_STS));
+
+ if (!retries) {
+ dev_err(dev, "timed out on set confirmation\n");
+ return -EIO;
+ }
+
+ /* Write time to RTC */
+ ret = wm8350_block_write(wm8350, WM8350_RTC_SECONDS_MINUTES, 4, time);
+ if (ret < 0)
+ return ret;
+
+ /* Clear RTC_SET to start the clock */
+ ret = wm8350_clear_bits(wm8350, WM8350_RTC_TIME_CONTROL,
+ WM8350_RTC_SET);
+ return ret;
+}
+
+/*
+ * Read alarm time and date in RTC
+ */
+static int wm8350_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(dev);
+ struct rtc_time *tm = &alrm->time;
+ u16 time[4];
+ int ret;
+
+ ret = wm8350_block_read(wm8350, WM8350_ALARM_SECONDS_MINUTES, 4, time);
+ if (ret < 0)
+ return ret;
+
+ tm->tm_sec = time[0] & WM8350_RTC_ALMSECS_MASK;
+ if (tm->tm_sec == WM8350_RTC_ALMSECS_MASK)
+ tm->tm_sec = -1;
+
+ tm->tm_min = time[0] & WM8350_RTC_ALMMINS_MASK;
+ if (tm->tm_min == WM8350_RTC_ALMMINS_MASK)
+ tm->tm_min = -1;
+ else
+ tm->tm_min >>= WM8350_RTC_ALMMINS_SHIFT;
+
+ tm->tm_hour = time[1] & WM8350_RTC_ALMHRS_MASK;
+ if (tm->tm_hour == WM8350_RTC_ALMHRS_MASK)
+ tm->tm_hour = -1;
+
+ tm->tm_wday = ((time[1] >> WM8350_RTC_ALMDAY_SHIFT) & 0x7) - 1;
+ if (tm->tm_wday > 7)
+ tm->tm_wday = -1;
+
+ tm->tm_mon = time[2] & WM8350_RTC_ALMMTH_MASK;
+ if (tm->tm_mon == WM8350_RTC_ALMMTH_MASK)
+ tm->tm_mon = -1;
+ else
+ tm->tm_mon = (tm->tm_mon >> WM8350_RTC_ALMMTH_SHIFT) - 1;
+
+ tm->tm_mday = (time[2] & WM8350_RTC_ALMDATE_MASK);
+ if (tm->tm_mday == WM8350_RTC_ALMDATE_MASK)
+ tm->tm_mday = -1;
+
+ tm->tm_year = -1;
+
+ alrm->enabled = !(time[3] & WM8350_RTC_ALMSTS);
+
+ return 0;
+}
+
+static int wm8350_rtc_stop_alarm(struct wm8350 *wm8350)
+{
+ int retries = WM8350_SET_ALM_RETRIES;
+ u16 rtc_ctrl;
+ int ret;
+
+ /* Set RTC_SET to stop the clock */
+ ret = wm8350_set_bits(wm8350, WM8350_RTC_TIME_CONTROL,
+ WM8350_RTC_ALMSET);
+ if (ret < 0)
+ return ret;
+
+ /* Wait until confirmation of stopping */
+ do {
+ rtc_ctrl = wm8350_reg_read(wm8350, WM8350_RTC_TIME_CONTROL);
+ schedule_timeout_uninterruptible(msecs_to_jiffies(1));
+ } while (retries-- && !(rtc_ctrl & WM8350_RTC_ALMSTS));
+
+ if (!(rtc_ctrl & WM8350_RTC_ALMSTS))
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static int wm8350_rtc_start_alarm(struct wm8350 *wm8350)
+{
+ int ret;
+ int retries = WM8350_SET_ALM_RETRIES;
+ u16 rtc_ctrl;
+
+ ret = wm8350_clear_bits(wm8350, WM8350_RTC_TIME_CONTROL,
+ WM8350_RTC_ALMSET);
+ if (ret < 0)
+ return ret;
+
+ /* Wait until confirmation */
+ do {
+ rtc_ctrl = wm8350_reg_read(wm8350, WM8350_RTC_TIME_CONTROL);
+ schedule_timeout_uninterruptible(msecs_to_jiffies(1));
+ } while (retries-- && rtc_ctrl & WM8350_RTC_ALMSTS);
+
+ if (rtc_ctrl & WM8350_RTC_ALMSTS)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static int wm8350_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(dev);
+ struct rtc_time *tm = &alrm->time;
+ u16 time[3];
+ int ret;
+
+ memset(time, 0, sizeof(time));
+
+ if (tm->tm_sec != -1)
+ time[0] |= tm->tm_sec;
+ else
+ time[0] |= WM8350_RTC_ALMSECS_MASK;
+
+ if (tm->tm_min != -1)
+ time[0] |= tm->tm_min << WM8350_RTC_ALMMINS_SHIFT;
+ else
+ time[0] |= WM8350_RTC_ALMMINS_MASK;
+
+ if (tm->tm_hour != -1)
+ time[1] |= tm->tm_hour;
+ else
+ time[1] |= WM8350_RTC_ALMHRS_MASK;
+
+ if (tm->tm_wday != -1)
+ time[1] |= (tm->tm_wday + 1) << WM8350_RTC_ALMDAY_SHIFT;
+ else
+ time[1] |= WM8350_RTC_ALMDAY_MASK;
+
+ if (tm->tm_mday != -1)
+ time[2] |= tm->tm_mday;
+ else
+ time[2] |= WM8350_RTC_ALMDATE_MASK;
+
+ if (tm->tm_mon != -1)
+ time[2] |= (tm->tm_mon + 1) << WM8350_RTC_ALMMTH_SHIFT;
+ else
+ time[2] |= WM8350_RTC_ALMMTH_MASK;
+
+ ret = wm8350_rtc_stop_alarm(wm8350);
+ if (ret < 0)
+ return ret;
+
+ /* Write time to RTC */
+ ret = wm8350_block_write(wm8350, WM8350_ALARM_SECONDS_MINUTES,
+ 3, time);
+ if (ret < 0)
+ return ret;
+
+ if (alrm->enabled)
+ ret = wm8350_rtc_start_alarm(wm8350);
+
+ return ret;
+}
+
+/*
+ * Handle commands from user-space
+ */
+static int wm8350_rtc_ioctl(struct device *dev, unsigned int cmd,
+ unsigned long arg)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(dev);
+
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ return wm8350_rtc_stop_alarm(wm8350);
+ case RTC_AIE_ON:
+ return wm8350_rtc_start_alarm(wm8350);
+
+ case RTC_UIE_OFF:
+ wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_SEC);
+ break;
+ case RTC_UIE_ON:
+ wm8350_unmask_irq(wm8350, WM8350_IRQ_RTC_SEC);
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
+}
+
+static void wm8350_rtc_alarm_handler(struct wm8350 *wm8350, int irq,
+ void *data)
+{
+ struct rtc_device *rtc = wm8350->rtc.rtc;
+ int ret;
+
+ rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF);
+
+ /* Make it one shot */
+ ret = wm8350_set_bits(wm8350, WM8350_RTC_TIME_CONTROL,
+ WM8350_RTC_ALMSET);
+ if (ret != 0) {
+ dev_err(&(wm8350->rtc.pdev->dev),
+ "Failed to disable alarm: %d\n", ret);
+ }
+}
+
+static void wm8350_rtc_update_handler(struct wm8350 *wm8350, int irq,
+ void *data)
+{
+ struct rtc_device *rtc = wm8350->rtc.rtc;
+
+ rtc_update_irq(rtc, 1, RTC_IRQF | RTC_UF);
+}
+
+static const struct rtc_class_ops wm8350_rtc_ops = {
+ .ioctl = wm8350_rtc_ioctl,
+ .read_time = wm8350_rtc_readtime,
+ .set_time = wm8350_rtc_settime,
+ .read_alarm = wm8350_rtc_readalarm,
+ .set_alarm = wm8350_rtc_setalarm,
+};
+
+#ifdef CONFIG_PM
+static int wm8350_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
+ int ret = 0;
+ u16 reg;
+
+ reg = wm8350_reg_read(wm8350, WM8350_RTC_TIME_CONTROL);
+
+ if (device_may_wakeup(&wm8350->rtc.pdev->dev) &&
+ reg & WM8350_RTC_ALMSTS) {
+ ret = wm8350_rtc_stop_alarm(wm8350);
+ if (ret != 0)
+ dev_err(&pdev->dev, "Failed to stop RTC alarm: %d\n",
+ ret);
+ }
+
+ return ret;
+}
+
+static int wm8350_rtc_resume(struct platform_device *pdev)
+{
+ struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
+ int ret;
+
+ if (wm8350->rtc.alarm_enabled) {
+ ret = wm8350_rtc_start_alarm(wm8350);
+ if (ret != 0)
+ dev_err(&pdev->dev,
+ "Failed to restart RTC alarm: %d\n", ret);
+ }
+
+ return 0;
+}
+
+#else
+#define wm8350_rtc_suspend NULL
+#define wm8350_rtc_resume NULL
+#endif
+
+static int wm8350_rtc_probe(struct platform_device *pdev)
+{
+ struct wm8350 *wm8350 = platform_get_drvdata(pdev);
+ struct wm8350_rtc *wm_rtc = &wm8350->rtc;
+ int ret = 0;
+ u16 timectl, power5;
+
+ timectl = wm8350_reg_read(wm8350, WM8350_RTC_TIME_CONTROL);
+ if (timectl & WM8350_RTC_BCD) {
+ dev_err(&pdev->dev, "RTC BCD mode not supported\n");
+ return -EINVAL;
+ }
+ if (timectl & WM8350_RTC_12HR) {
+ dev_err(&pdev->dev, "RTC 12 hour mode not supported\n");
+ return -EINVAL;
+ }
+
+ /* enable the RTC if it's not already enabled */
+ power5 = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
+ if (!(power5 & WM8350_RTC_TICK_ENA)) {
+ dev_info(wm8350->dev, "Starting RTC\n");
+
+ wm8350_reg_unlock(wm8350);
+
+ ret = wm8350_set_bits(wm8350, WM8350_POWER_MGMT_5,
+ WM8350_RTC_TICK_ENA);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to enable RTC: %d\n", ret);
+ return ret;
+ }
+
+ wm8350_reg_lock(wm8350);
+ }
+
+ if (timectl & WM8350_RTC_STS) {
+ int retries;
+
+ ret = wm8350_clear_bits(wm8350, WM8350_RTC_TIME_CONTROL,
+ WM8350_RTC_SET);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to start: %d\n", ret);
+ return ret;
+ }
+
+ retries = WM8350_SET_TIME_RETRIES;
+ do {
+ timectl = wm8350_reg_read(wm8350,
+ WM8350_RTC_TIME_CONTROL);
+ } while (timectl & WM8350_RTC_STS && retries--);
+
+ if (retries == 0) {
+ dev_err(&pdev->dev, "failed to start: timeout\n");
+ return -ENODEV;
+ }
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+
+ wm_rtc->rtc = rtc_device_register("wm8350", &pdev->dev,
+ &wm8350_rtc_ops, THIS_MODULE);
+ if (IS_ERR(wm_rtc->rtc)) {
+ ret = PTR_ERR(wm_rtc->rtc);
+ dev_err(&pdev->dev, "failed to register RTC: %d\n", ret);
+ return ret;
+ }
+
+ wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_SEC);
+ wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_PER);
+
+ wm8350_register_irq(wm8350, WM8350_IRQ_RTC_SEC,
+ wm8350_rtc_update_handler, NULL);
+
+ wm8350_register_irq(wm8350, WM8350_IRQ_RTC_ALM,
+ wm8350_rtc_alarm_handler, NULL);
+ wm8350_unmask_irq(wm8350, WM8350_IRQ_RTC_ALM);
+
+ return 0;
+}
+
+static int __devexit wm8350_rtc_remove(struct platform_device *pdev)
+{
+ struct wm8350 *wm8350 = platform_get_drvdata(pdev);
+ struct wm8350_rtc *wm_rtc = &wm8350->rtc;
+
+ wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_SEC);
+
+ wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC);
+ wm8350_free_irq(wm8350, WM8350_IRQ_RTC_ALM);
+
+ rtc_device_unregister(wm_rtc->rtc);
+
+ return 0;
+}
+
+static struct platform_driver wm8350_rtc_driver = {
+ .probe = wm8350_rtc_probe,
+ .remove = __devexit_p(wm8350_rtc_remove),
+ .suspend = wm8350_rtc_suspend,
+ .resume = wm8350_rtc_resume,
+ .driver = {
+ .name = "wm8350-rtc",
+ },
+};
+
+static int __init wm8350_rtc_init(void)
+{
+ return platform_driver_register(&wm8350_rtc_driver);
+}
+module_init(wm8350_rtc_init);
+
+static void __exit wm8350_rtc_exit(void)
+{
+ platform_driver_unregister(&wm8350_rtc_driver);
+}
+module_exit(wm8350_rtc_exit);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("RTC driver for the WM8350");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm8350-rtc");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 09:11:04 +0000