target/linux/bcm27xx/patches-5.4/950-0620-i2c-brcmstb-The-interrupt-line-is-optional-so-use-pl.patch

   1 From 8aa48c2a3fa470d348104e8f8aa558a661b724e5 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Tue, 31 Mar 2020 16:23:11 +0100
   4 Subject: [PATCH] i2c: brcmstb: The interrupt line is optional, so use
   5  platform_get_irq_optional
   6
   7 If there is no interrupt defined then an error is logged due
   8 to the use of platform_get_irq. The driver handles not having
   9 the interrupt by falling back to polling, therefore make
  10 the appropriate call when claiming it.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/i2c/busses/i2c-brcmstb.c | 20 +++++++++++---------
  15  1 file changed, 11 insertions(+), 9 deletions(-)
  16
  17 --- a/drivers/i2c/busses/i2c-brcmstb.c
  18 +++ b/drivers/i2c/busses/i2c-brcmstb.c
  19 @@ -647,20 +647,22 @@ static int brcmstb_i2c_probe(struct plat
  20                 int_name = NULL;
  21
  22         /* Get the interrupt number */
  23 -       dev->irq = platform_get_irq(pdev, 0);
  24 +       dev->irq = platform_get_irq_optional(pdev, 0);
  25
  26         /* disable the bsc interrupt line */
  27         brcmstb_i2c_enable_disable_irq(dev, INT_DISABLE);
  28
  29         /* register the ISR handler */
  30 -       rc = devm_request_irq(&pdev->dev, dev->irq, brcmstb_i2c_isr,
  31 -                             IRQF_SHARED,
  32 -                             int_name ? int_name : pdev->name,
  33 -                             dev);
  34 +       if (dev->irq >= 0) {
  35 +               rc = devm_request_irq(&pdev->dev, dev->irq, brcmstb_i2c_isr,
  36 +                                     IRQF_SHARED,
  37 +                                     int_name ? int_name : pdev->name,
  38 +                                     dev);
  39
  40 -       if (rc) {
  41 -               dev_dbg(dev->device, "falling back to polling mode");
  42 -               dev->irq = -1;
  43 +               if (rc) {
  44 +                       dev_dbg(dev->device, "falling back to polling mode");
  45 +                       dev->irq = -1;
  46 +               }
  47         }
  48
  49         if (of_property_read_u32(dev->device->of_node,