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>

diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 2217ca688b64fb3fb71e80b8cde78cc1a18ddc42..9f2b32f22f16a5a49aafc73580fb78d75cd681f4 100644 (file)
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -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;