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m68k: mac: Remove redundant VIA register writes 

There's no need to write the same value to the timer latch and timer
counter registers. Values written to the counter registers get stored
in the latches anyway. The write to vT1CH copies the latch values to
the counter.

Cc: Joshua Thompson <funaho@jurai.org>
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Link: https://lore.kernel.org/r/c6b1d9620af3e8f89dd0157a41fa4147294b251d.1605847196.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Finn Thain 2020-11-20 15:39:56 +11:00 committed by Geert Uytterhoeven
parent 471037e2c9
commit 0c450b8e78
1 changed files with 0 additions and 6 deletions
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6
arch/m68k/mac/via.c
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@ -169,8 +169,6 @@ void __init via_init(void)
via1[vIER] = 0x7F;
via1[vIFR] = 0x7F;
via1[vT1LL] = 0;
via1[vT1LH] = 0;
via1[vT1CL] = 0;
via1[vT1CH] = 0;
via1[vT2CL] = 0;
@ -225,8 +223,6 @@ void __init via_init(void)
via2[gIER] = 0x7F;
via2[gIFR] = 0x7F | rbv_clear;
if (!rbv_present) {
via2[vT1LL] = 0;
via2[vT1LH] = 0;
via2[vT1CL] = 0;
via2[vT1CH] = 0;
via2[vT2CL] = 0;
@ -604,8 +600,6 @@ void __init via_init_clock(irq_handler_t timer_routine)
return;
}
via1[vT1LL] = VIA_TC_LOW;
via1[vT1LH] = VIA_TC_HIGH;
via1[vT1CL] = VIA_TC_LOW;
via1[vT1CH] = VIA_TC_HIGH;
via1[vACR] |= 0x40;