target/linux/bcm27xx/patches-5.4/950-0429-staging-vchiq_arm-Give-vchiq-children-DT-nodes.patch

   1 From 9f93264df7a631132f2dacd150d0cc6cb7d20fc4 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Mon, 3 Feb 2020 17:30:46 +0000
   4 Subject: [PATCH] staging: vchiq_arm: Give vchiq children DT nodes
   5
   6 vchiq kernel clients are now instantiated as platform drivers rather
   7 than using DT, but the children of the vchiq interface may still
   8 benefit from access to DT properties. Give them the option of a
   9 a sub-node of the vchiq parent for configuration and to allow
  10 them to be disabled.
  11
  12 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  13 ---
  14  .../staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 8 ++++++++
  15  1 file changed, 8 insertions(+)
  16
  17 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  18 +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  19 @@ -3190,12 +3190,20 @@ vchiq_register_child(struct platform_dev
  20         pdevinfo.id = PLATFORM_DEVID_NONE;
  21         pdevinfo.dma_mask = DMA_BIT_MASK(32);
  22
  23 +       np = of_get_child_by_name(pdev->dev.of_node, name);
  24 +
  25 +       /* Skip the child if it is explicitly disabled */
  26 +       if (np && !of_device_is_available(np))
  27 +               return NULL;
  28 +
  29         child = platform_device_register_full(&pdevinfo);
  30         if (IS_ERR(child)) {
  31                 dev_warn(&pdev->dev, "%s not registered\n", name);
  32                 child = NULL;
  33         }
  34
  35 +       child->dev.of_node = np;
  36 +
  37         /*
  38          * We want the dma-ranges etc to be copied from a device with the
  39          * correct dma-ranges for the VPU.