From ae58d882bfd3e537b1ed4a4c3577ca9ba853f0d8 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Mon, 19 Jan 2015 12:00:55 +0000 Subject: 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 Fixes: e9de688dac65 ("irqchip: mips-gic: Support local interrupts") Reviewed-by: Andrew Bresticker Cc: Ralf Baechle Cc: Steven J. Hill Cc: Qais Yousef Cc: Jason Cooper Cc: Thomas Gleixner Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9077/ Signed-off-by: Ralf Baechle --- drivers/irqchip/irq-mips-gic.c | 8 -------- 1 file changed, 8 deletions(-) (limited to 'drivers/irqchip') diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 2b0468e3df6a..e58600b1de28 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -191,14 +191,6 @@ static bool gic_local_irq_is_routable(int intr) } } -unsigned int gic_get_timer_pending(void) -{ - unsigned int vpe_pending; - - vpe_pending = gic_read(GIC_REG(VPE_LOCAL, GIC_VPE_PEND)); - return vpe_pending & GIC_VPE_PEND_TIMER_MSK; -} - static void gic_bind_eic_interrupt(int irq, int set) { /* Convert irq vector # to hw int # */ -- cgit v1.2.3-58-ga151