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serial: altera_jtaguart: Use platform_get_irq_optional() to get the interrupt

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platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq_optional().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211224142917.6966-7-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lad Prabhakar 2021-12-24 14:29:12 +00:00 committed by Greg Kroah-Hartman
parent 6050efac12
commit 60302276ca
1 changed files with 7 additions and 4 deletions
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11
drivers/tty/serial/altera_jtaguart.c
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@ -418,8 +418,9 @@ static int altera_jtaguart_probe(struct platform_device *pdev)
struct altera_jtaguart_platform_uart *platp =
dev_get_platdata(&pdev->dev);
struct uart_port *port;
struct resource *res_irq, *res_mem;
struct resource *res_mem;
int i = pdev->id;
int irq;
/* -1 emphasizes that the platform must have one port, no .N suffix */
if (i == -1)
@ -438,9 +439,11 @@ static int altera_jtaguart_probe(struct platform_device *pdev)
else
return -ENODEV;
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res_irq)
port->irq = res_irq->start;
irq = platform_get_irq_optional(pdev, 0);
if (irq < 0 && irq != -ENXIO)
return irq;
if (irq > 0)
port->irq = irq;
else if (platp)
port->irq = platp->irq;
else