diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2018-12-01 11:53:10 +1100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2019-03-25 10:22:24 +0100 |
| commit | 7529b90d051e4629884771ba2b1d3a87d2c6a9d7 (patch) | |
| tree | f95960fd233bf19c0840e65a9281d71576a2abdc /arch/m68k/include/asm | |
| parent | fc4c47b3b5b8fe2b5d2940b9bd6203609b571b50 (diff) | |
| download | linux-7529b90d051e4629884771ba2b1d3a87d2c6a9d7.tar.bz2 | |
m68k: mvme147: Handle timer counter overflow
Reading the timer counter races with timer overflow (and the
corresponding interrupt). This is resolved by reading the overflow
register and taking this value into account. The interrupt handler
must clear the overflow register when it eventually executes.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/include/asm')
| -rw-r--r-- | arch/m68k/include/asm/mvme147hw.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/mvme147hw.h b/arch/m68k/include/asm/mvme147hw.h index 7c3dd513128e..257b29184af9 100644 --- a/arch/m68k/include/asm/mvme147hw.h +++ b/arch/m68k/include/asm/mvme147hw.h @@ -66,6 +66,7 @@ struct pcc_regs { #define PCC_INT_ENAB 0x08 #define PCC_TIMER_INT_CLR 0x80 +#define PCC_TIMER_CLR_OVF 0x04 #define PCC_LEVEL_ABORT 0x07 #define PCC_LEVEL_SERIAL 0x04 |