[PATCH 06/10] ARM: FIQ: Remove FIQ_START

Anton Vorontsov
2012-11-23T00:53:46Z

RPC:

FIQ_START is irrelevant nowadays, the arch uses platform-specific
iomd_{,un}mask_fiq() calls.

OMAP1:

The only user of FIQs is MACH_AMS_DELTA, and in particular its
drivers/input/serio/ams_delta_serio.c driver. The driver does not rely on
the FIQ interrupts directly, instead it uses a "deferred fiq" interrupt
(raised after a buffer filled by the FIQ routine).

The FIQ handling routines are not using disable_fiq() or enable_fiq()
stuff, so it currently does not use FIQ_START at all -- the asm code uses
OMAP_IH1_BASE and twiddles the bits itself.

S3C:

The only user of FIQs on s3c24xx is spi-s3c24xx driver. The driver works
with interrupt controller directly (via S3C24XX_VA_IRQ base address), and
does not use IRQ subsystem to mask/unmask IRQs.

MXC:

Users now use enable/disable_irq() routines. The drivers rely on a
correctly passed VIRQ cookie anyway, so FIQ_START becomes irrelevant.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
---
arch/arm/include/asm/mach/irq.h | 2 +-
arch/arm/kernel/fiq.c | 2 +-
arch/arm/mach-omap1/include/mach/irqs.h | 4 ----
arch/arm/mach-rpc/include/mach/irqs.h | 5 -----
arch/arm/mach-rpc/irq.c | 2 +-
arch/arm/mach-s3c24xx/include/mach/irqs.h | 3 ---
arch/arm/plat-mxc/avic.c | 2 +-
arch/arm/plat-mxc/include/mach/irqs.h | 2 --
arch/arm/plat-mxc/tzic.c | 2 +-
arch/arm/plat-s3c24xx/irq.c | 2 +-
10 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/arch/arm/include/asm/mach/irq.h b/arch/arm/include/asm/mach/irq.h
index 15cb035..febe495 100644
--- a/arch/arm/include/asm/mach/irq.h
+++ b/arch/arm/include/asm/mach/irq.h
@@ -17,7 +17,7 @@ struct seq_file;
/*
* This is internal. Do not use it.
*/
-extern void init_FIQ(int);
+extern void init_FIQ(void);
extern int show_fiq_list(struct seq_file *, int);

#ifdef CONFIG_MULTI_IRQ_HANDLER
diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c
index 29b93b8..bd369c5 100644
--- a/arch/arm/kernel/fiq.c
+++ b/arch/arm/kernel/fiq.c
@@ -128,7 +128,7 @@ EXPORT_SYMBOL(__get_fiq_regs); /* defined in fiqasm.S */
EXPORT_SYMBOL(claim_fiq);
EXPORT_SYMBOL(release_fiq);

-void __init init_FIQ(int start)
+void __init init_FIQ(void)
{
no_fiq_insn = *(unsigned long *)0xffff001c;
}
diff --git a/arch/arm/mach-omap1/include/mach/irqs.h b/arch/arm/mach-omap1/include/mach/irqs.h
index 729992d..f254bb6 100644
--- a/arch/arm/mach-omap1/include/mach/irqs.h
+++ b/arch/arm/mach-omap1/include/mach/irqs.h
@@ -261,8 +261,4 @@

#include <mach/hardware.h>

-#ifdef CONFIG_FIQ
-#define FIQ_START 1024
-#endif
-
#endif
diff --git a/arch/arm/mach-rpc/include/mach/irqs.h b/arch/arm/mach-rpc/include/mach/irqs.h
index f27ead1..2536543 100644
--- a/arch/arm/mach-rpc/include/mach/irqs.h
+++ b/arch/arm/mach-rpc/include/mach/irqs.h
@@ -42,9 +42,4 @@ extern void iomd_mask_fiq(int fiq);
extern void iomd_unmask_fiq(int fiq);
#endif

-/*
- * This is the offset of the FIQ "IRQ" numbers
- */
-#define FIQ_START 64
-
#define NR_IRQS 128
diff --git a/arch/arm/mach-rpc/irq.c b/arch/arm/mach-rpc/irq.c
index a4221b3..07770c8 100644
--- a/arch/arm/mach-rpc/irq.c
+++ b/arch/arm/mach-rpc/irq.c
@@ -152,6 +152,6 @@ void __init rpc_init_irq(void)
}
}

- init_FIQ(FIQ_START);
+ init_FIQ();
}

diff --git a/arch/arm/mach-s3c24xx/include/mach/irqs.h b/arch/arm/mach-s3c24xx/include/mach/irqs.h
index b7a9f4d..7d66d41 100644
--- a/arch/arm/mach-s3c24xx/include/mach/irqs.h
+++ b/arch/arm/mach-s3c24xx/include/mach/irqs.h
@@ -209,7 +209,4 @@
#define IRQ_S3C244X_AC97 IRQ_S3C2443_AC97
#endif

-/* Our FIQs are routable from IRQ_EINT0 to IRQ_ADCPARENT */
-#define FIQ_START IRQ_EINT0
-
#endif /* __ASM_ARCH_IRQ_H */
diff --git a/arch/arm/plat-mxc/avic.c b/arch/arm/plat-mxc/avic.c
index cbd55c3..19701ec 100644
--- a/arch/arm/plat-mxc/avic.c
+++ b/arch/arm/plat-mxc/avic.c
@@ -218,7 +218,7 @@ void __init mxc_init_irq(void __iomem *irqbase)

#ifdef CONFIG_FIQ
/* Initialize FIQ */
- init_FIQ(FIQ_START);
+ init_FIQ();
#endif

printk(KERN_INFO "MXC IRQ initialized\n");
diff --git a/arch/arm/plat-mxc/include/mach/irqs.h b/arch/arm/plat-mxc/include/mach/irqs.h
index d73f5e8..2ec942f 100644
--- a/arch/arm/plat-mxc/include/mach/irqs.h
+++ b/arch/arm/plat-mxc/include/mach/irqs.h
@@ -13,8 +13,6 @@

extern int imx_irq_set_priority(unsigned char irq, unsigned char prio);

-/* all normal IRQs can be FIQs */
-#define FIQ_START 0
/* switch between IRQ and FIQ */
extern int mxc_set_irq_fiq(unsigned int irq, unsigned int type);

diff --git a/arch/arm/plat-mxc/tzic.c b/arch/arm/plat-mxc/tzic.c
index 3ed1adb..d09b573 100644
--- a/arch/arm/plat-mxc/tzic.c
+++ b/arch/arm/plat-mxc/tzic.c
@@ -193,7 +193,7 @@ void __init tzic_init_irq(void __iomem *irqbase)

#ifdef CONFIG_FIQ
/* Initialize FIQ */
- init_FIQ(FIQ_START);
+ init_FIQ();
#endif

pr_info("TrustZone Interrupt Controller (TZIC) initialized\n");
diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c
index e4e9567..e0de92a 100644
--- a/arch/arm/plat-s3c24xx/irq.c
+++ b/arch/arm/plat-s3c24xx/irq.c
@@ -533,7 +533,7 @@ void __init s3c24xx_init_irq(void)
int i;

#ifdef CONFIG_FIQ
- init_FIQ(FIQ_START);
+ init_FIQ();
#endif

irqdbf("s3c2410_init_irq: clearing interrupt status flags\n");
--
1.8.0