m68k/mac: cleanup mac_clear_irq

mac_clear_irq() is dead code and has been dead for as long as I can recall. On certain Mac models, certain irqs can't be cleared this way. Outside of irq dispatch, this code appears be unusable without busy loops or worse, and for irq dispatch we duplicate the same logic. Remove mac_clear_irq() and supporting code.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 0 insertions, 8 deletions

diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index e6c2d20f328d..8dd71c555e93 100644
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -181,14 +181,6 @@ void psc_irq_disable(int irq) {
         psc_write_byte(pIER, 1 << irq_idx);
 }
 
-void psc_irq_clear(int irq) {
-        int irq_src     = IRQ_SRC(irq);
-        int irq_idx     = IRQ_IDX(irq);
-        int pIFR        = pIERbase + (irq_src << 4);
-
-        psc_write_byte(pIFR, 1 << irq_idx);
-}
-
 int psc_irq_pending(int irq)
 {
         int irq_src     = IRQ_SRC(irq);