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authorLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>2021-12-24 14:29:10 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-30 13:26:48 +0100
commit5b68061983471470d4109bac776145245f06bc09 (patch)
tree4d9eb76556bf174b1d0ba933357a4288d2e9dc58 /drivers/tty
parentc195438f1e84de8fa46b4f5264d12379bee6e9a1 (diff)
serial: meson: 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/20211224142917.6966-5-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/meson_uart.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index efee3935917f..4bc87f0c5868 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -713,10 +713,11 @@ static int meson_uart_probe_clocks(struct platform_device *pdev,
static int meson_uart_probe(struct platform_device *pdev)
{
- struct resource *res_mem, *res_irq;
+ struct resource *res_mem;
struct uart_port *port;
u32 fifosize = 64; /* Default is 64, 128 for EE UART_0 */
int ret = 0;
+ int irq;
if (pdev->dev.of_node)
pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
@@ -739,9 +740,9 @@ static int meson_uart_probe(struct platform_device *pdev)
if (!res_mem)
return -ENODEV;
- res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res_irq)
- return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
of_property_read_u32(pdev->dev.of_node, "fifo-size", &fifosize);
@@ -766,7 +767,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->mapsize = resource_size(res_mem);
- port->irq = res_irq->start;
+ port->irq = irq;
port->flags = UPF_BOOT_AUTOCONF | UPF_LOW_LATENCY;
port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MESON_CONSOLE);
port->dev = &pdev->dev;