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Subject[PATCH 02/10] irqchip: sunxi-nmi: Document interrupt disabling and clearing at probe time
Date
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>
---
drivers/irqchip/irq-sunxi-nmi.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/irqchip/irq-sunxi-nmi.c b/drivers/irqchip/irq-sunxi-nmi.c
index 177efb473c7d..9a7f6971cc3a 100644
--- a/drivers/irqchip/irq-sunxi-nmi.c
+++ b/drivers/irqchip/irq-sunxi-nmi.c
@@ -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);
--
2.11.0
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