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serial: pmac_zilog: Use platform_get_irq() to get the interrupt 

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/20211224142917.6966-11-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 14:29:16 +00:00 committed by Greg Kroah-Hartman
parent fc67c91329
commit e3b27e2f56
1 changed files with 8 additions and 4 deletions
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12
drivers/tty/serial/pmac_zilog.c
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@ -1702,17 +1702,21 @@ extern struct platform_device scc_a_pdev, scc_b_pdev;
static int __init pmz_init_port(struct uart_pmac_port *uap)
{
struct resource *r_ports, *r_irq;
struct resource *r_ports;
int irq;
r_ports = platform_get_resource(uap->pdev, IORESOURCE_MEM, 0);
r_irq = platform_get_resource(uap->pdev, IORESOURCE_IRQ, 0);
if (!r_ports || !r_irq)
if (!r_ports)
return -ENODEV;
irq = platform_get_irq(uap->pdev, 0);
if (irq < 0)
return irq;
uap->port.mapbase = r_ports->start;
uap->port.membase = (unsigned char __iomem *) r_ports->start;
uap->port.iotype = UPIO_MEM;
uap->port.irq = r_irq->start;
uap->port.irq = irq;
uap->port.uartclk = ZS_CLOCK;
uap->port.fifosize = 1;
uap->port.ops = &pmz_pops;