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676ca3c3fd
When building with W=1:
arch/m68k/apollo/dn_ints.c:43:13: warning: no previous prototype for ‘dn_init_IRQ’ [-Wmissing-prototypes]
43 | void __init dn_init_IRQ(void)
| ^~~~~~~~~~~
Fix this by introducing a new header file "apollo.h" for holding the
prototypes of functions implemented in arch/m68k/apollo/.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/d78eceb83b8dd1931be1789204898060664e23f6.1694613528.git.geert@linux-m68k.org
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <asm/traps.h>
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#include <asm/apollohw.h>
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#include "apollo.h"
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static unsigned int apollo_irq_startup(struct irq_data *data)
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{
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unsigned int irq = data->irq;
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if (irq < 8)
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*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
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else
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*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
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return 0;
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}
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static void apollo_irq_shutdown(struct irq_data *data)
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{
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unsigned int irq = data->irq;
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if (irq < 8)
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*(volatile unsigned char *)(pica+1) |= (1 << irq);
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else
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*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
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}
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static void apollo_irq_eoi(struct irq_data *data)
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{
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*(volatile unsigned char *)(pica) = 0x20;
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*(volatile unsigned char *)(picb) = 0x20;
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}
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static struct irq_chip apollo_irq_chip = {
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.name = "apollo",
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.irq_startup = apollo_irq_startup,
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.irq_shutdown = apollo_irq_shutdown,
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.irq_eoi = apollo_irq_eoi,
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};
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void __init dn_init_IRQ(void)
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{
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m68k_setup_user_interrupt(VEC_USER + 96, 16);
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m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
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IRQ_APOLLO, 16);
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}
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