target/linux/bcm27xx/patches-5.10/950-0187-pinctrl-bcm2835-Accept-fewer-than-expected-IRQs.patch

   1 From 9ab71458b5475c7d8d42896721e593f6ef1a5c7a Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Tue, 25 Feb 2020 17:38:20 +0000
   4 Subject: [PATCH] pinctrl: bcm2835: Accept fewer than expected IRQs
   5
   6 The downstream .dts files only request two GPIO IRQs. Truncate the
   7 array of parent IRQs when irq_of_parse_and_map returns 0.
   8
   9 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  10 ---
  11  drivers/pinctrl/bcm/pinctrl-bcm2835.c | 8 ++++++--
  12  1 file changed, 6 insertions(+), 2 deletions(-)
  13
  14 --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
  15 +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
  16 @@ -1288,9 +1288,13 @@ static int bcm2835_pinctrl_probe(struct
  17                 char *name;
  18
  19                 girq->parents[i] = irq_of_parse_and_map(np, i);
  20 -               if (!is_7211)
  21 +               if (!is_7211) {
  22 +                       if (!girq->parents[i]) {
  23 +                               girq->num_parents = i;
  24 +                               break;
  25 +                       }
  26                         continue;
  27 -
  28 +               }
  29                 /* Skip over the all banks interrupts */
  30                 pc->wake_irq[i] = irq_of_parse_and_map(np, i +
  31                                                        BCM2835_NUM_IRQS + 1);