[openwrt/openwrt] kernel: 5.10: silence bogus "Missing #address-cells in interrupt provider" warnings

[LEDE Commits]

chunkeey pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/36104dc51f5a4fef961b97aaaa8dfe753dfb5e04

commit 36104dc51f5a4fef961b97aaaa8dfe753dfb5e04
Author: Christian Lamparter <chunkeey at gmail.com>
AuthorDate: Sun Oct 24 02:45:25 2021 +0200

    kernel: 5.10: silence bogus "Missing #address-cells in interrupt provider" warnings
    
    Rosen reported strange dtc warnings that had their origin in
    an upstream patch to 5.8-rc1. Upon further digging this
    revealed an ongoing thread [0] discussing the topic:
    
    > [...]I don't think we need a bunch of warning fix patches to add
    > these everywhere. Also, the need for #address-cells pretty much makes
    > no sense on any modern system. It is a relic from days when the bus
    > (address) topology and interrupt topology were related.
    
    and later on:
    > So really, we only need to be checking for #address-cells in nodes
    > with interrupt-map.
    
    This patch backports just the patch which removed the warning message
    (this is from the upstream dtc project [1] - but not the kernel).
    the patch does not add the checking of the #address-cells in nodes
    with interrupt-map.
    
    [0] <https://lore.kernel.org/linux-devicetree/91e3405245c89f134676449cf3822285798d2ed2.1612189652.git.michal.simek@xilinx.com/>
    [1] <https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=d8d1a9a77863a8c7031ae82a1d461aa78eb72a7b>
    Link: <https://github.com/openwrt/openwrt/pull/4685>
    Reported-by: Rosen Penev <rosenp at gmail.com>
    Signed-off-by: Christian Lamparter <chunkeey at gmail.com>
---
 ...op-interrupt-provider-address-cells-check.patch | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/target/linux/generic/pending-5.10/050-dtc-checks-Drop-interrupt-provider-address-cells-check.patch b/target/linux/generic/pending-5.10/050-dtc-checks-Drop-interrupt-provider-address-cells-check.patch
new file mode 100644
index 0000000000..75f63728ec
--- /dev/null
+++ b/target/linux/generic/pending-5.10/050-dtc-checks-Drop-interrupt-provider-address-cells-check.patch
@@ -0,0 +1,28 @@
+From d8d1a9a77863a8c7031ae82a1d461aa78eb72a7b Mon Sep 17 00:00:00 2001
+From: Rob Herring <robh at kernel.org>
+Date: Mon, 11 Oct 2021 14:12:43 -0500
+Subject: [PATCH] checks: Drop interrupt provider '#address-cells' check
+
+'#address-cells' is only needed when parsing 'interrupt-map' properties, so
+remove it from the common interrupt-provider test.
+
+Cc: Andre Przywara <andre.przywara at arm.com>
+Reviewed-by: David Gibson <david at gibson.dropbear.id.au>
+Signed-off-by: Rob Herring <robh at kernel.org>
+Message-Id: <20211011191245.1009682-3-robh at kernel.org>
+Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
+---
+--- a/scripts/dtc/checks.c
++++ b/scripts/dtc/checks.c
+@@ -1569,11 +1569,6 @@ static void check_interrupt_provider(str
+ 	if (!prop)
+ 		FAIL(c, dti, node,
+ 		     "Missing #interrupt-cells in interrupt provider");
+-
+-	prop = get_property(node, "#address-cells");
+-	if (!prop)
+-		FAIL(c, dti, node,
+-		     "Missing #address-cells in interrupt provider");
+ }
+ WARNING(interrupt_provider, check_interrupt_provider, NULL);
+