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authorJames Hogan <james.hogan@imgtec.com>2015-01-19 13:00:55 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-02-05 14:56:53 +0100
commitae58d882bfd3e537b1ed4a4c3577ca9ba853f0d8 (patch)
tree94c7b0cc96305c93d09aca129302432037939803 /include
parentMIPS: elf2ecoff: Fix warning due to dead code. (diff)
downloadlinux-ae58d882bfd3e537b1ed4a4c3577ca9ba853f0d8.tar.xz
linux-ae58d882bfd3e537b1ed4a4c3577ca9ba853f0d8.zip
MIPS: cevt-r4k: Drop GIC special case
The cevt-r4k driver used to call into the GIC driver to find whether the timer was pending, but only with External Interrupt Controller (EIC) mode, where the Cause.IP bits can't be used as they encode the interrupt priority level (Cause.RIPL) instead. However commit e9de688dac65 ("irqchip: mips-gic: Support local interrupts") changed the condition from cpu_has_veic to gic_present. This fails on cores such as P5600 which have a GIC but the local interrupts aren't routable by the GIC, causing c0_compare_int_usable() to consider the interrupt unusable so r4k_clockevent_init() fails. The previous behaviour, added in commit 98b67c37db33 ("MIPS: Add EIC support for GIC."), wasn't really correct either as far as I can tell, since P5600 apparently supports EIC mode too, and in any case the use of Cause.TI with r2 should have been sufficient anyway since commit 010c108d7af7 ("MIPS: PowerTV: Fix support for timer interrupts with > 64 external IRQs"). Therefore drop the call into the gic driver altogether, and add a comment in c0_compare_int_pending() to clarify that Cause.TI does get checked since MIPS r2. Signed-off-by: James Hogan <james.hogan@imgtec.com> Fixes: e9de688dac65 ("irqchip: mips-gic: Support local interrupts") Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Steven J. Hill <steven.hill@imgtec.com> Cc: Qais Yousef <qais.yousef@imgtec.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9077/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irqchip/mips-gic.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/irqchip/mips-gic.h b/include/linux/irqchip/mips-gic.h
index 420f77b34d02..e6a6aac451db 100644
--- a/include/linux/irqchip/mips-gic.h
+++ b/include/linux/irqchip/mips-gic.h
@@ -243,7 +243,6 @@ extern void gic_write_cpu_compare(cycle_t cnt, int cpu);
extern void gic_send_ipi(unsigned int intr);
extern unsigned int plat_ipi_call_int_xlate(unsigned int);
extern unsigned int plat_ipi_resched_int_xlate(unsigned int);
-extern unsigned int gic_get_timer_pending(void);
extern int gic_get_c0_compare_int(void);
extern int gic_get_c0_perfcount_int(void);
#endif /* __LINUX_IRQCHIP_MIPS_GIC_H */