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tty/hvc: Use opal irqchip interface if available 

Update the hvc driver to use the OPAL irqchip if made available by the
running firmware. If it is not present, the driver falls back to the
existing OPAL event number.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Sam Mendoza-Jonas 2016-07-11 13:38:58 +10:00 committed by Michael Ellerman
parent bbc3dfe880
commit 00dab8187e
1 changed files with 7 additions and 1 deletions
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8
drivers/tty/hvc/hvc_opal.c
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@ -214,7 +214,13 @@ static int hvc_opal_probe(struct platform_device *dev)
dev->dev.of_node->full_name,
boot ? " (boot console)" : "");
irq = opal_event_request(ilog2(OPAL_EVENT_CONSOLE_INPUT));
irq = irq_of_parse_and_map(dev->dev.of_node, 0);
if (!irq) {
pr_info("hvc%d: No interrupts property, using OPAL event\n",
termno);
irq = opal_event_request(ilog2(OPAL_EVENT_CONSOLE_INPUT));
}
if (!irq) {
pr_err("hvc_opal: Unable to map interrupt for device %s\n",
dev->dev.of_node->full_name);