* [PATCH] arm64: dts: imx8mq: specify dma-ranges
@ 2019-02-08 18:53 Lucas Stach
2019-02-11 5:44 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Lucas Stach @ 2019-02-08 18:53 UTC (permalink / raw)
To: Shawn Guo
Cc: Fabio Estevam, patchwork-lst, NXP Linux Team,
Pengutronix Kernel Team, linux-arm-kernel
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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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: dts: imx8mq: specify dma-ranges
2019-02-08 18:53 [PATCH] arm64: dts: imx8mq: specify dma-ranges Lucas Stach
@ 2019-02-11 5:44 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2019-02-11 5:44 UTC (permalink / raw)
To: Lucas Stach
Cc: Fabio Estevam, patchwork-lst, NXP Linux Team,
Pengutronix Kernel Team, linux-arm-kernel
On Fri, Feb 08, 2019 at 07:53:49PM +0100, Lucas Stach wrote:
> 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>
Applied, thanks.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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