mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 11:30:54 +07:00
96615841e1
The v3020 RTC can be connected to GPIOs as well as to memory-like interface. Add ability to use GPIO bit-bang for v3020 read-write access. [akpm@linux-foundation.org: fix off-by-one in error path] Signed-off-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/*
|
|
* 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() */
|
|
|
|
int use_gpio:1;
|
|
unsigned int gpio_cs;
|
|
unsigned int gpio_wr;
|
|
unsigned int gpio_rd;
|
|
unsigned int gpio_io;
|
|
};
|
|
|
|
#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 */
|