On 17/12/14 13:40, Geert Uytterhoeven wrote:
> As of commit 9a1091ef0017c40a ("irqchip: gic: Support hierarchy irq
> domain."), armadillo-legacy hangs during boot with:
>
> sh-tmu.0: ch0: used for clock events
> sh-tmu.0: ch0: used for periodic clock events
> sh-tmu.0: ch0: failed to request irq 230
> sh-tmu.0: ch1: used as clock source
> sh-cmt-48.1: ch0: failed to request irq 90
> sh-cmt-48.1: ch0: registration failed
> earlytimer: unable to probe sh-cmt-48 early.
> Calibrating delay loop...
>
> This happens because the IRQ numbers of the GIC are now virtual, and no
> longer match the hardcoded hardware IRQ numbers in the platform board
> code.
> To fix this, instantiate the GIC from platform board code when compiling
> a legacy kernel, like is done on sh73a0 for kzm9g-legacy.
Ah, that explains why kzm9g-legacy didn't explode in -next...
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> ---
> arch/arm/mach-shmobile/setup-r8a7740.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/mach-shmobile/setup-r8a7740.c
> b/arch/arm/mach-shmobile/setup-r8a7740.c
> index 79ad93dfdae4ee70..d191cf4197313482 100644
> --- a/arch/arm/mach-shmobile/setup-r8a7740.c
> +++ b/arch/arm/mach-shmobile/setup-r8a7740.c
> @@ -800,7 +800,14 @@ void __init r8a7740_init_irq_of(void)
> void __iomem *intc_msk_base = ioremap_nocache(0xe6900040, 0x10);
> void __iomem *pfc_inta_ctrl = ioremap_nocache(0xe605807c, 0x4);
>
> +#ifdef CONFIG_ARCH_SHMOBILE_LEGACY
> + void __iomem *gic_dist_base = ioremap_nocache(0xc2800000, 0x1000);
> + void __iomem *gic_cpu_base = ioremap_nocache(0xc2000000, 0x1000);
> +
> + gic_init(0, 29, gic_dist_base, gic_cpu_base);
> +#else
> irqchip_init();
> +#endif
>
> /* route signals to GIC */
> iowrite32(0x0, pfc_inta_ctrl);
>
Hopefully we'll be able to move away from this kind of thing at some
point. Until then:
Acked-by: Marc Zyngier <[email protected]>
M.
--
Jazz is not dead. It just smells funny...
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