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irqchip/sunxi-nmi: Document interrupt disabling and clearing at probe time 

The sunxi-nmi disables all its interrupts and clears any pending
interrupts at probe time.

Add comments documenting it, just to make it clear.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Chen-Yu Tsai 2017-06-06 13:59:24 +08:00 committed by Marc Zyngier
parent 9ce18f6f0b
commit e3ece0d5a3
1 changed files with 3 additions and 0 deletions
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3
drivers/irqchip/irq-sunxi-nmi.c
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@ -201,7 +201,10 @@ static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
gc->chip_types[1].regs.type = reg_offs->ctrl;
gc->chip_types[1].handler = handle_edge_irq;
/* Disable any active interrupts */
sunxi_sc_nmi_write(gc, reg_offs->enable, 0);
/* Clear any pending NMI interrupts */
sunxi_sc_nmi_write(gc, reg_offs->pend, SUNXI_NMI_IRQ_BIT);
irq_set_chained_handler_and_data(irq, sunxi_sc_nmi_handle_irq, domain);