diff options
| author | Raphael Assenat <raph@raphnet.net> | 2006-06-25 05:48:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:01:14 -0700 |
| commit | 362600fe60fd18a25b4de8ec544b9e24e77e1484 (patch) | |
| tree | 7dd8c3c518e1b453eb5bd412e69d9d598c680948 /include/linux/rtc-v3020.h | |
| parent | 9be05b57bd9152b7c26b1599b87aeb42a102f0cf (diff) | |
| download | lwn-362600fe60fd18a25b4de8ec544b9e24e77e1484.tar.gz lwn-362600fe60fd18a25b4de8ec544b9e24e77e1484.zip | |
[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.h | 35 |
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 @@ +/* + * v3020.h - Registers definition and platform data structure for the v3020 RTC. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2006, 8D Technologies inc. + */ +#ifndef __LINUX_V3020_H +#define __LINUX_V3020_H + +/* The v3020 has only one data pin but which one + * is used depends on the board. */ +struct v3020_platform_data { + int leftshift; /* (1<<(leftshift)) & readl() */ +}; + +#define V3020_STATUS_0 0x00 +#define V3020_STATUS_1 0x01 +#define V3020_SECONDS 0x02 +#define V3020_MINUTES 0x03 +#define V3020_HOURS 0x04 +#define V3020_MONTH_DAY 0x05 +#define V3020_MONTH 0x06 +#define V3020_YEAR 0x07 +#define V3020_WEEK_DAY 0x08 +#define V3020_WEEK 0x09 + +#define V3020_IS_COMMAND(val) ((val)>=0x0E) + +#define V3020_CMD_RAM2CLOCK 0x0E +#define V3020_CMD_CLOCK2RAM 0x0F + +#endif /* __LINUX_V3020_H */ |