The ARM TWD interrupt is a private peripheral interrupt (PPI), and per the ARM GIC documentation, whether the type for PPIs can be set is IMPLEMENTATION DEFINED. For R-Car H1 devices the PPI type cannot be set, and so when we attempt to set the type for the ARM TWD interrupt it fails. This has gone unnoticed because it fails silently, and because we cannot re-configure the type it has had no impact. Nevertheless fix the type for the TWD interrupt so that it matches the hardware configuration. Based on patches by Jon Hunter for Tegra20/30 and OMAP4. Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- Exposed by Jon Hunter's "[PATCH 04/15] irqchip/gic: WARN if setting the interrupt type fails": WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-common.c:61 gic_configure_irq+0x64/0x7c() Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-marzen-00426-g226dd0f378de2fe5-dirty #87 Hardware name: Generic R8A7779 (Flattened Device Tree) [<c010fb54>] (unwind_backtrace) from [<c010b614>] (show_stack+0x10/0x14) [<c010b614>] (show_stack) from [<c02f362c>] (dump_stack+0xa4/0xdc) [<c02f362c>] (dump_stack) from [<c0121d88>] (warn_slowpath_common+0x84/0xb0) [<c0121d88>] (warn_slowpath_common) from [<c0121e44>] (warn_slowpath_null+0x18/0x20) [<c0121e44>] (warn_slowpath_null) from [<c03171cc>] (gic_configure_irq+0x64/0x7c) [<c03171cc>] (gic_configure_irq) from [<c0316878>] (gic_set_type+0x48/0x60) [<c0316878>] (gic_set_type) from [<c016fa98>] (__irq_set_trigger+0xac/0x17c) [<c016fa98>] (__irq_set_trigger) from [<c016feac>] (__setup_irq+0x344/0x5d8) [<c016feac>] (__setup_irq) from [<c017042c>] (request_percpu_irq+0x98/0xe0) [<c017042c>] (request_percpu_irq) from [<c0804dd8>] (twd_local_timer_common_register+0x38/0x1ac) [<c0804dd8>] (twd_local_timer_common_register) from [<c0804f94>] (twd_local_timer_of_register+0x48/0x70) [<c0804f94>] (twd_local_timer_of_register) from [<c081c04c>] (clocksource_probe+0x48/0x88) [<c081c04c>] (clocksource_probe) from [<c0800b14>] (start_kernel+0x24c/0x3cc) [<c0800b14>] (start_kernel) from [<6000807c>] (0x6000807c) --- arch/arm/boot/dts/r8a7779.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/r8a7779.dtsi b/arch/arm/boot/dts/r8a7779.dtsi index 540f3c57a7b32356..2581363879d9dfff 100644 --- a/arch/arm/boot/dts/r8a7779.dtsi +++ b/arch/arm/boot/dts/r8a7779.dtsi @@ -71,7 +71,7 @@ compatible = "arm,cortex-a9-twd-timer"; reg = <0xf0000600 0x20>; interrupts = <GIC_PPI 13 - (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>; + (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_EDGE_RISING)>; clocks = <&cpg_clocks R8A7779_CLK_ZS>; }; -- 1.9.1
