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authorLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>2021-12-24 14:29:13 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-30 13:26:49 +0100
commitf63f1ddb5c2a9713c4cafce71d1eb3c1471d42e5 (patch)
treeec243e70a2aa4c6a91700c4c1dd849a0995d0093 /drivers/tty
parent60302276caff50f907bc3391a364691ab4a21b43 (diff)
serial: vt8500: 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/20211224142917.6966-8-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/vt8500_serial.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index e15b2bf69904..9adfe3dc970f 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -621,21 +621,25 @@ static const struct of_device_id wmt_dt_ids[] = {
static int vt8500_serial_probe(struct platform_device *pdev)
{
struct vt8500_port *vt8500_port;
- struct resource *mmres, *irqres;
+ struct resource *mmres;
struct device_node *np = pdev->dev.of_node;
const unsigned int *flags;
int ret;
int port;
+ int irq;
flags = of_device_get_match_data(&pdev->dev);
if (!flags)
return -EINVAL;
mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!mmres || !irqres)
+ if (!mmres)
return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
if (np) {
port = of_alias_get_id(np, "serial");
if (port >= VT8500_MAX_PORTS)
@@ -688,7 +692,7 @@ static int vt8500_serial_probe(struct platform_device *pdev)
vt8500_port->uart.type = PORT_VT8500;
vt8500_port->uart.iotype = UPIO_MEM;
vt8500_port->uart.mapbase = mmres->start;
- vt8500_port->uart.irq = irqres->start;
+ vt8500_port->uart.irq = irq;
vt8500_port->uart.fifosize = 16;
vt8500_port->uart.ops = &vt8500_uart_pops;
vt8500_port->uart.line = port;