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Message-Id: <20230823073330.1712721-4-pankaj.gupta@nxp.com>
Date: Wed, 23 Aug 2023 13:03:22 +0530
From: Pankaj Gupta <pankaj.gupta@....com>
To: shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
clin@...e.com, conor+dt@...nel.org, pierre.gondois@....com,
ping.bai@....com, xiaoning.wang@....com, wei.fang@....com,
peng.fan@....com, haibo.chen@....com, festevam@...il.com,
linux-imx@....com, davem@...emloft.net, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, gaurav.jain@....com,
alexander.stein@...tq-group.com, sahil.malhotra@....com,
aisheng.dong@....com, V.Sethi@....com
Cc: Pankaj Gupta <pankaj.gupta@....com>
Subject: [PATCH v5 03/11] arm64: dts: imx8ulp-evk: reserved mem-ranges to constrain ele_fw dma-range
EdgeLock Enclave are has a hardware limitation of restricted access
to the DDR memory range:
- 0x90000000 - 0xAFFFFFFF
ELE-FW driver requireis 1MB of memory. In this patch the we are reserving
1MB of ddr memory region from the lower 32-bit range.
Signed-off-by: Dong Aisheng <aisheng.dong@....com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@....com>
---
arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
index f1c6d933a17c..747cb9d6b2e9 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
@@ -19,6 +19,17 @@ memory@...00000 {
device_type = "memory";
reg = <0x0 0x80000000 0 0x80000000>;
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ele_reserved: ele-reserved@...00000 {
+ compatible = "shared-dma-pool";
+ reg = <0 0x90000000 0 0x100000>;
+ no-map;
+ };
+ };
clock_ext_rmii: clock-ext-rmii {
compatible = "fixed-clock";
@@ -53,6 +64,10 @@ &usdhc0 {
status = "okay";
};
+&ele_fw2 {
+ memory-region = <&ele_reserved>;
+};
+
&fec {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&pinctrl_enet>;
--
2.34.1
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