target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch

   1 From 12de4b5e7cbcd193d5abb753ca511fe8f2236846 Mon Sep 17 00:00:00 2001
   2 From: Pawel Dembicki <paweldembicki@gmail.com>
   3 Date: Fri, 13 Nov 2020 07:30:03 +0100
   4 Subject: [PATCH 1/1] gpio-pca953x: hack: Allow to use falling trigger
   5
   6 Gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
   7 Gpio-pca953x allow only low state trigger. This hack fix the problem.
   8
   9 Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
  10 ---
  11
  12 --- a/drivers/gpio/gpio-pca953x.c
  13 +++ b/drivers/gpio/gpio-pca953x.c
  14 @@ -879,10 +879,12 @@ static int pca953x_irq_setup(struct pca9
  15         for (i = 0; i < NBANK(chip); i++)
  16                 chip->irq_stat[i] &= reg_direction[i];
  17         mutex_init(&chip->irq_lock);
  18 -
  19 +       /* gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
  20 +        * This hack fix the problem.
  21 +        */
  22         ret = devm_request_threaded_irq(&client->dev, client->irq,
  23                                         NULL, pca953x_irq_handler,
  24 -                                       IRQF_TRIGGER_LOW | IRQF_ONESHOT |
  25 +                                       IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
  26                                         IRQF_SHARED,
  27                                         dev_name(&client->dev), chip);
  28         if (ret) {