On Wed, Jan 07, 2015 at 05:42:41PM +0000, Marc Zyngier wrote:
[...]
> diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
[...]
> void __init tegra_init_irq(void)
> {
> - int i;
> - void __iomem *distbase;
> -
> - if (of_find_matching_node(NULL, tegra_ictlr_match))
> - goto skip_extn_setup;
> -
> - tegra_legacy_irq_syscore_init();
> -
> - distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
> - num_ictlrs = readl_relaxed(distbase + GIC_DIST_CTR) & 0x1f;
> -
> - if (num_ictlrs > ARRAY_SIZE(ictlr_reg_base)) {
> - WARN(1, "Too many (%d) interrupt controllers found. Maximum is %d.",
> - num_ictlrs, ARRAY_SIZE(ictlr_reg_base));
> - num_ictlrs = ARRAY_SIZE(ictlr_reg_base);
> - }
> -
> - for (i = 0; i < num_ictlrs; i++) {
> - void __iomem *ictlr = ictlr_reg_base[i];
> - writel(~0, ictlr + ICTLR_CPU_IER_CLR);
> - writel(0, ictlr + ICTLR_CPU_IEP_CLASS);
> - }
> -
> - gic_arch_extn.irq_ack = tegra_ack;
> - gic_arch_extn.irq_eoi = tegra_eoi;
> - gic_arch_extn.irq_mask = tegra_mask;
> - gic_arch_extn.irq_unmask = tegra_unmask;
> - gic_arch_extn.irq_retrigger = tegra_retrigger;
> - gic_arch_extn.irq_set_wake = tegra_set_wake;
> - gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;
> + if (!of_find_matching_node(NULL, tegra_ictlr_match))
> + pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
I'm not very happy about the ABI breakage here, but I also realize that
we need this change to properly describe the hardware. To make it more
obvious that people really should update their DTBs, maybe turn this
into a WARN()?
> -skip_extn_setup:
> tegra114_gic_cpu_pm_registration();
I'm not intimately familiar with the GIC, but is this really SoC
specific? Doesn't anybody else need this? Comparing to the GIC spec the
write of 0x1e0 to the GIC_CPU_CTRL register (which I assume corresponds
to GICC_CTLR in the spec), this simply disables the IRQ and FIQ bypass
signals for both group 0 and group 1.
Thierry
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