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authorRaphael Assenat <raph@raphnet.net>2006-06-25 08:48:24 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-25 13:01:14 -0400
commit362600fe60fd18a25b4de8ec544b9e24e77e1484 (patch)
tree7dd8c3c518e1b453eb5bd412e69d9d598c680948 /include/linux/rtc-v3020.h
parent9be05b57bd9152b7c26b1599b87aeb42a102f0cf (diff)
[PATCH] Add v3020 RTC support
This patch adds support for the v3020 RTC from EM Microelectronic. The v3020 RTC is designed to be connected on a bus using only one data bit. Since any data bit may be used, it is necessary to specify this to the driver by passing a struct v3020_platform_data pointer (see include/linux/rtc-v3020.h) to the driver. Part of the following code comes from the kernel patchs produced by Compulab for their products. The original file (available here: http://raph.people.8d.com/misc/emv3020.c) was released under the terms of the GPL license. [akpm@osdl.org: cleanups] Signed-off-by: Raphael Assenat <raph@raphnet.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/rtc-v3020.h')
-rw-r--r--include/linux/rtc-v3020.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/rtc-v3020.h b/include/linux/rtc-v3020.h
new file mode 100644
index 000000000000..bf74e63c98fe
--- /dev/null
+++ b/include/linux/rtc-v3020.h
@@ -0,0 +1,35 @@
1/*
2 * v3020.h - Registers definition and platform data structure for the v3020 RTC.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2006, 8D Technologies inc.
9 */
10#ifndef __LINUX_V3020_H
11#define __LINUX_V3020_H
12
13/* The v3020 has only one data pin but which one
14 * is used depends on the board. */
15struct v3020_platform_data {
16 int leftshift; /* (1<<(leftshift)) & readl() */
17};
18
19#define V3020_STATUS_0 0x00
20#define V3020_STATUS_1 0x01
21#define V3020_SECONDS 0x02
22#define V3020_MINUTES 0x03
23#define V3020_HOURS 0x04
24#define V3020_MONTH_DAY 0x05
25#define V3020_MONTH 0x06
26#define V3020_YEAR 0x07
27#define V3020_WEEK_DAY 0x08
28#define V3020_WEEK 0x09
29
30#define V3020_IS_COMMAND(val) ((val)>=0x0E)
31
32#define V3020_CMD_RAM2CLOCK 0x0E
33#define V3020_CMD_CLOCK2RAM 0x0F
34
35#endif /* __LINUX_V3020_H */