+++ /dev/null
---- a/drivers/rtc/Kconfig
-+++ b/drivers/rtc/Kconfig
-@@ -379,6 +379,15 @@ config RTC_DRV_RV3029C2
- This driver can also be built as a module. If so, the module
- will be called rtc-rv3029c2.
-
-+config RTC_DRV_PT7C4338
-+ tristate "Pericom Technology Inc. PT7C4338 RTC"
-+ help
-+ If you say yes here you get support for the Pericom Technology
-+ Inc. PT7C4338 RTC chip.
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called rtc-pt7c4338.
-+
- endif # I2C
-
- comment "SPI RTC drivers"
---- a/drivers/rtc/Makefile
-+++ b/drivers/rtc/Makefile
-@@ -79,6 +79,7 @@ obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030
- obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
- obj-$(CONFIG_RTC_DRV_PM8XXX) += rtc-pm8xxx.o
- obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o
-+obj-$(CONFIG_RTC_DRV_PT7C4338) += rtc-pt7c4338.o
- obj-$(CONFIG_RTC_DRV_PUV3) += rtc-puv3.o
- obj-$(CONFIG_RTC_DRV_PXA) += rtc-pxa.o
- obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o
---- /dev/null
-+++ b/drivers/rtc/rtc-pt7c4338.c
-@@ -0,0 +1,216 @@
-+/*
-+ * Copyright 2010 Freescale Semiconductor, Inc.
-+ *
-+ * Author: Priyanka Jain <Priyanka.Jain@freescale.com>
-+ *
-+ * See file CREDITS for list of people who contributed to this
-+ * project.
-+ *
-+ * 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.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
-+ * MA 02111-1307 USA
-+ */
-+
-+/*
-+ * This file provides Date & Time support (no alarms) for PT7C4338 chip.
-+ *
-+ * This file is based on drivers/rtc/rtc-ds1307.c
-+ *
-+ * PT7C4338 chip is manufactured by Pericom Technology Inc.
-+ * It is a serial real-time clock which provides
-+ * 1)Low-power clock/calendar.
-+ * 2)Programmable square-wave output.
-+ * It has 56 bytes of nonvolatile RAM.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/i2c.h>
-+#include <linux/rtc.h>
-+#include <linux/bcd.h>
-+
-+/* RTC register addresses */
-+#define PT7C4338_REG_SECONDS 0x00
-+#define PT7C4338_REG_MINUTES 0x01
-+#define PT7C4338_REG_HOURS 0x02
-+#define PT7C4338_REG_AMPM 0x02
-+#define PT7C4338_REG_DAY 0x03
-+#define PT7C4338_REG_DATE 0x04
-+#define PT7C4338_REG_MONTH 0x05
-+#define PT7C4338_REG_YEAR 0x06
-+#define PT7C4338_REG_CTRL_STAT 0x07
-+
-+/* RTC second register address bit */
-+#define PT7C4338_SEC_BIT_CH 0x80 /*Clock Halt (in Register 0)*/
-+
-+/* RTC control and status register bits */
-+#define PT7C4338_CTRL_STAT_BIT_RS0 0x1 /*Rate select 0*/
-+#define PT7C4338_CTRL_STAT_BIT_RS1 0x2 /*Rate select 1*/
-+#define PT7C4338_CTRL_STAT_BIT_SQWE 0x10 /*Square Wave Enable*/
-+#define PT7C4338_CTRL_STAT_BIT_OSF 0x20 /*Oscillator Stop Flag*/
-+#define PT7C4338_CTRL_STAT_BIT_OUT 0x80 /*Output Level Control*/
-+
-+static const struct i2c_device_id pt7c4338_id[] = {
-+ { "pt7c4338", 0 },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(i2c, pt7c4338_id);
-+
-+struct pt7c4338{
-+ struct i2c_client *client;
-+ struct rtc_device *rtc;
-+};
-+
-+static int pt7c4338_read_time(struct device *dev, struct rtc_time *time)
-+{
-+ struct i2c_client *client = to_i2c_client(dev);
-+ int ret;
-+ u8 buf[7];
-+ u8 year, month, day, hour, minute, second;
-+ u8 week, twelve_hr, am_pm;
-+
-+ ret = i2c_smbus_read_i2c_block_data(client,
-+ PT7C4338_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 */
-+ twelve_hr = hour & 0x40;
-+ am_pm = hour & 0x20;
-+
-+ /* Write to rtc_time structure */
-+ time->tm_sec = bcd2bin(second & 0x7f);
-+ time->tm_min = bcd2bin(minute & 0x7f);
-+ if (twelve_hr) {
-+ /* Convert to 24 hr */
-+ if (am_pm)
-+ time->tm_hour = bcd2bin(hour & 0x10) + 12;
-+ else
-+ time->tm_hour = bcd2bin(hour & 0xBF);
-+ } else {
-+ time->tm_hour = bcd2bin(hour);
-+ }
-+
-+ time->tm_wday = bcd2bin(week & 0x07) - 1;
-+ time->tm_mday = bcd2bin(day & 0x3f);
-+ time->tm_mon = bcd2bin(month & 0x1F) - 1;
-+ /* assume 20YY not 19YY */
-+ time->tm_year = bcd2bin(year) + 100;
-+
-+ return 0;
-+}
-+
-+static int pt7c4338_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 pt7c4338*/
-+ buf[0] = bin2bcd(time->tm_sec);
-+ buf[1] = bin2bcd(time->tm_min);
-+ buf[2] = bin2bcd(time->tm_hour);
-+ buf[3] = bin2bcd(time->tm_wday + 1); /* Day of the week */
-+ buf[4] = bin2bcd(time->tm_mday); /* Date */
-+ buf[5] = bin2bcd(time->tm_mon + 1);
-+
-+ /* assume 20YY not 19YY */
-+ if (time->tm_year >= 100)
-+ buf[6] = bin2bcd(time->tm_year - 100);
-+ else
-+ buf[6] = bin2bcd(time->tm_year);
-+
-+ return i2c_smbus_write_i2c_block_data(client,
-+ PT7C4338_REG_SECONDS, 7, buf);
-+}
-+
-+static const struct rtc_class_ops pt7c4338_rtc_ops = {
-+ .read_time = pt7c4338_read_time,
-+ .set_time = pt7c4338_set_time,
-+};
-+
-+static int pt7c4338_probe(struct i2c_client *client,
-+ const struct i2c_device_id *id)
-+{
-+ struct pt7c4338 *pt7c4338;
-+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
-+ int ret;
-+
-+ pt7c4338 = kzalloc(sizeof(struct pt7c4338), GFP_KERNEL);
-+ if (!pt7c4338)
-+ return -ENOMEM;
-+
-+ pt7c4338->client = client;
-+ i2c_set_clientdata(client, pt7c4338);
-+ pt7c4338->rtc = rtc_device_register(client->name, &client->dev,
-+ &pt7c4338_rtc_ops, THIS_MODULE);
-+ if (IS_ERR(pt7c4338->rtc)) {
-+ ret = PTR_ERR(pt7c4338->rtc);
-+ dev_err(&client->dev, "unable to register the class device\n");
-+ goto out_free;
-+ }
-+
-+ return 0;
-+out_free:
-+ i2c_set_clientdata(client, NULL);
-+ kfree(pt7c4338);
-+ return ret;
-+}
-+
-+static int __devexit pt7c4338_remove(struct i2c_client *client)
-+{
-+ struct pt7c4338 *pt7c4338 = i2c_get_clientdata(client);
-+
-+ rtc_device_unregister(pt7c4338->rtc);
-+ i2c_set_clientdata(client, NULL);
-+ kfree(pt7c4338);
-+ return 0;
-+}
-+
-+static struct i2c_driver pt7c4338_driver = {
-+ .driver = {
-+ .name = "rtc-pt7c4338",
-+ .owner = THIS_MODULE,
-+ },
-+ .probe = pt7c4338_probe,
-+ .remove = __devexit_p(pt7c4338_remove),
-+ .id_table = pt7c4338_id,
-+};
-+
-+static int __init pt7c4338_init(void)
-+{
-+ return i2c_add_driver(&pt7c4338_driver);
-+}
-+
-+static void __exit pt7c4338_exit(void)
-+{
-+ i2c_del_driver(&pt7c4338_driver);
-+}
-+
-+module_init(pt7c4338_init);
-+module_exit(pt7c4338_exit);
-+
-+MODULE_AUTHOR("Priyanka Jain <Priyanka.Jain@freescale.com>");
-+MODULE_DESCRIPTION("pericom Technology Inc. PT7C4338 RTC Driver");
-+MODULE_LICENSE("GPL");
projects / openwrt / svn-archive / archive.git / blobdiff