linux-kernel - [PATCH v2] arm64: dts: ti: k3-j721s2: fix overlapping GICD memory region

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Date:   Fri, 17 Jun 2022 07:02:07 -0700
From:   Matt Ranostay <mranostay@...com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Matt Ranostay <mranostay@...com>, Marc Zyngier <maz@...nel.org>,
        Robin Murphy <robin.murphy@....com>, Nishanth Menon <nm@...com>
Subject: [PATCH v2] arm64: dts: ti: k3-j721s2: fix overlapping GICD memory region

GICD region was overlapping with GICR causing the latter to not map
successfully, and in turn the gic-v3 driver would fail to initialize.

This issue was hidden till commit 2b2cd74a06c3 ("irqchip/gic-v3: Claim iomem resources")
replaced of_iomap() calls with of_io_request_and_map() that internally
called request_mem_region().

Respective console output before this patchset:

[    0.000000] GICv3: /bus@...000/interrupt-controller@...0000: couldn't map region 0

Fixes: 2b2cd74a06c3 ("irqchip/gic-v3: Claim iomem resources")
Cc: Marc Zyngier <maz@...nel.org>
Cc: Robin Murphy <robin.murphy@....com>
Cc: Nishanth Menon <nm@...com>
Signed-off-by: Matt Ranostay <mranostay@...com>
---
 arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Changes from v1:
* Add missing Fixes: in commit messages

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
index be7f39299894..19966f72c5b3 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
@@ -33,7 +33,7 @@ gic500: interrupt-controller@...0000 {
 		ranges;
 		#interrupt-cells = <3>;
 		interrupt-controller;
-		reg = <0x00 0x01800000 0x00 0x200000>, /* GICD */
+		reg = <0x00 0x01800000 0x00 0x100000>, /* GICD */
 		      <0x00 0x01900000 0x00 0x100000>, /* GICR */
 		      <0x00 0x6f000000 0x00 0x2000>,   /* GICC */
 		      <0x00 0x6f010000 0x00 0x1000>,   /* GICH */
-- 
2.36.1