linux-kernel - [RFC 07/13] arm64: Mark ARCH_MVEBU as needing broken 64bit MMIO support

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Message-Id: <20210226140305.26356-8-nsaenzjulienne@suse.de>
Date:   Fri, 26 Feb 2021 15:02:59 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     f.fainelli@...il.com, robh+dt@...nel.org, robin.murphy@....com,
        ardb@...nel.org, hch@...radead.org, narmstrong@...libre.com,
        dwmw2@...radead.org, linux@...linux.org.uk,
        catalin.marinas@....com, arnd@...db.de, will@...nel.org,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Subject: [RFC 07/13] arm64: Mark ARCH_MVEBU as needing broken 64bit MMIO support

The bus AP806's IOMMU sits on can't handle 64bit MMIO accesses[1]. So
select 'ARCH_HAS_64BIT_MMIO_BROKEN' for the platform.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
[1] See Armada-AP806 erratum #582743
---
 arch/arm64/Kconfig.platforms | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index cdfd5fed457f..04a97cf486c5 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -175,6 +175,7 @@ config ARCH_MESON
 
 config ARCH_MVEBU
 	bool "Marvell EBU SoC Family"
+	select ARCH_HAS_64BIT_MMIO_BROKEN
 	select ARMADA_AP806_SYSCON
 	select ARMADA_CP110_SYSCON
 	select ARMADA_37XX_CLK
-- 
2.30.1