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serial: pxa: Use platform_get_irq() 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().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211224142917.6966-6-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 14:29:11 +00:00 committed by Greg Kroah-Hartman
parent 5b68061983
commit 6050efac12
1 changed files with 8 additions and 4 deletions
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12
drivers/tty/serial/pxa.c
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@ -842,14 +842,18 @@ static int serial_pxa_probe_dt(struct platform_device *pdev,
static int serial_pxa_probe(struct platform_device *dev)
{
struct uart_pxa_port *sport;
struct resource *mmres, *irqres;
struct resource *mmres;
int ret;
int irq;
mmres = platform_get_resource(dev, IORESOURCE_MEM, 0);
irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0);
if (!mmres || !irqres)
if (!mmres)
return -ENODEV;
irq = platform_get_irq(dev, 0);
if (irq < 0)
return irq;
sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL);
if (!sport)
return -ENOMEM;
@ -869,7 +873,7 @@ static int serial_pxa_probe(struct platform_device *dev)
sport->port.type = PORT_PXA;
sport->port.iotype = UPIO_MEM;
sport->port.mapbase = mmres->start;
sport->port.irq = irqres->start;
sport->port.irq = irq;
sport->port.fifosize = 64;
sport->port.ops = &serial_pxa_pops;
sport->port.dev = &dev->dev;