github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 20:54:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

soc: fsl: qe: Iterate over all pending interrupts in cascade handler

Browse Source 
Instead of only servicing a single interrupt, the chained handler can
handle all IRQs that have their bit set in the event register.
This avoid multiple parent IRQ handler being serviced if more than one
interrupt are pending on the QE PIC.

Remove unused code.

Signed-off-by: Paul Louvel <paul.louvel@bootlin.com>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Link: https://lore.kernel.org/r/20260708-qe-pic-gpios-v2-6-1972044cfbd1@bootlin.com
Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
This commit is contained in:
Paul Louvel 2026-07-08 12:15:19 +02:00 committed by Christophe Leroy (CS GROUP)
parent 9727108464
commit 0887d5f68c
1 changed files with 5 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/soc/fsl/qe/qe_ports_ic.c
View File

@ -5,6 +5,7 @@
* Copyright (c) 2025 Christophe Leroy CS GROUP France (christophe.leroy@csgroup.eu)
*/
#include <linux/bitops.h>
#include <linux/irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
@ -70,25 +71,17 @@ static struct irq_chip qepic = {
.irq_set_type = qepic_set_type,
};
static int qepic_get_irq(struct irq_desc *desc)
{
struct qepic_data *data = irq_desc_get_handler_data(desc);
u32 event = ioread32be(data->reg + CEPIER);
if (!event)
return -1;
return 32 - ffs(event);
}
static void qepic_cascade(struct irq_desc *desc)
{
struct qepic_data *data = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long event, bit;
chained_irq_enter(chip, desc);
generic_handle_domain_irq(data->host, qepic_get_irq(desc));
event = ioread32be(data->reg + CEPIER);
for_each_set_bit(bit, &event, 32)
generic_handle_domain_irq(data->host, 31 - bit);
chained_irq_exit(chip, desc);
}