From: Lucas Stach <l.stach@pengutronix.de>
To: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <fabio.estevam@nxp.com>,
patchwork-lst@pengutronix.de, NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm64: dts: imx8mq: specify dma-ranges
Date: Fri, 8 Feb 2019 19:53:49 +0100 [thread overview]
Message-ID: <20190208185349.6259-1-l.stach@pengutronix.de> (raw)
The peripheral bus on the i.MX8MQ is still limited to 32bits, so
we need to declare the usable range for device DMA operations, as
the DRAM will extend across the 32bit boundary if more than 3GB
are installed.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
arch/arm64/boot/dts/freescale/imx8mq.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 23d967213030..e3977339cd56 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -146,6 +146,7 @@
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x0 0x0 0x3e000000>;
+ dma-ranges = <0x40000000 0x0 0x40000000 0xc0000000>;
bus@30000000 { /* AIPS1 */
compatible = "fsl,imx8mq-aips-bus", "simple-bus";
--
2.20.1
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next reply other threads:[~2019-02-08 18:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 18:53 Lucas Stach [this message]
2019-02-11 5:44 ` [PATCH] arm64: dts: imx8mq: specify dma-ranges Shawn Guo
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