xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

rtc-v3020: add ability to access v3020 chip with GPIOs

Browse Source 
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>
This commit is contained in:
Mike Rapoport
2009-04-02 16:57:01 -07:00
committed by Linus Torvalds
parent c1c490e017
commit 96615841e1
2 changed files with 176 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/rtc-v3020.h
View File

@@ -14,6 +14,12 @@
* 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