rtc: add support for the ST M48T59 RTC

[akpm@linux-foundation.org: x86_64 build fix]
[akpm@linux-foundation.org: The acpi guys changed the bin_attribute code]
Signed-off-by: Mark Zhan <rongkai.zhan@windriver.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/include/linux/rtc/m48t59.h b/include/linux/rtc/m48t59.h
new file mode 100644
index 000000000000..e8c7c21ceb1f
--- /dev/null
+++ b/include/linux/rtc/m48t59.h
@@ -0,0 +1,57 @@
+/*
+ * include/linux/rtc/m48t59.h
+ *
+ * Definitions for the platform data of m48t59 RTC chip driver.
+ *
+ * Copyright (c) 2007 Wind River Systems, Inc.
+ *
+ * Mark Zhan <rongkai.zhan@windriver.com>
+ *
+ * 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.
+ */
+
+#ifndef _LINUX_RTC_M48T59_H_
+#define _LINUX_RTC_M48T59_H_
+
+/*
+ * M48T59 Register Offset
+ */
+#define M48T59_YEAR             0x1fff
+#define M48T59_MONTH            0x1ffe
+#define M48T59_MDAY             0x1ffd  /* Day of Month */
+#define M48T59_WDAY             0x1ffc  /* Day of Week */
+#define M48T59_WDAY_CB                  0x20    /* Century Bit */
+#define M48T59_WDAY_CEB                 0x10    /* Century Enable Bit */
+#define M48T59_HOUR             0x1ffb
+#define M48T59_MIN              0x1ffa
+#define M48T59_SEC              0x1ff9
+#define M48T59_CNTL             0x1ff8
+#define M48T59_CNTL_READ                0x40
+#define M48T59_CNTL_WRITE               0x80
+#define M48T59_WATCHDOG         0x1ff7
+#define M48T59_INTR             0x1ff6
+#define M48T59_INTR_AFE                 0x80    /* Alarm Interrupt Enable */
+#define M48T59_INTR_ABE                 0x20
+#define M48T59_ALARM_DATE       0x1ff5
+#define M48T59_ALARM_HOUR       0x1ff4
+#define M48T59_ALARM_MIN        0x1ff3
+#define M48T59_ALARM_SEC        0x1ff2
+#define M48T59_UNUSED           0x1ff1
+#define M48T59_FLAGS            0x1ff0
+#define M48T59_FLAGS_WDT                0x80    /* watchdog timer expired */
+#define M48T59_FLAGS_AF                 0x40    /* alarm */
+#define M48T59_FLAGS_BF                 0x10    /* low battery */
+
+#define M48T59_NVRAM_SIZE       0x1ff0
+
+struct m48t59_plat_data {
+        /* The method to access M48T59 registers,
+         * NOTE: The 'ofs' should be 0x00~0x1fff
+         */
+        void (*write_byte)(struct device *dev, u32 ofs, u8 val);
+        unsigned char (*read_byte)(struct device *dev, u32 ofs);
+};
+
+#endif /* _LINUX_RTC_M48T59_H_ */