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authorSven Eckelmann <sven.eckelmann@openmesh.com>2018-04-17 14:31:53 +0200
committerMathias Kresin <dev@kresin.me>2018-04-20 20:58:52 +0200
commit0d6243283415683dc792ea34fcba885454908836 (patch)
tree79b6e3354a7ee03323573c80b5d3e01ab2c3ecc3 /target/linux/ipq40xx/patches-4.14
parent74a0d8cd92c7e753c6a342a7b90151ec042a03c5 (diff)
downloadupstream-0d6243283415683dc792ea34fcba885454908836.tar.gz
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ipq40xx: Remove unused reserved-memory nodes
The reserved-memory regions are mostly undocumented by QCA and are named very unspecific in the QSDK device trees. It was tried to clean them up by commit 71ed9f10a33e ("ipq40xx: Use detailed reserved memory for A42") and similar changes. The features which require these regions were mostly unknown but Senthilkumar N L <snlakshm@qti.qualcomm.com> and Sricharan Ramabadhran <srichara@qti.qualcomm.com> provided some more insight in some of them: * crash dump feature - a couple of regions used when 'qca,scm_restart_reason' dt node has the value 'dload_status' not set to 1 + apps_bl <0x87000000 0x400000> + sbl <0x87400000 0x100000> + cnss_debug <0x87400000 0x100000> + cpu_context_dump <0x87b00000 0x080000> - required driver not available in Linux - safe to remove * QSEE app execution - region tz_apps <0x87b80000 0x280000> - required driver not available in Linux - safe to remove * communication with TZ/QSEE - region smem <0x87b80000 0x280000> - driver changes not yet upstreamed - must not be removed because any access can crash kernel/program * trustzone (QSEE) private memory - region tz <0x87e80000 0x180000> - must not be removed because any access can crash kernel/program Removing the unnecessary regions saves some kilobyte of reserved-memory and cleans up the device tree: * 2560 KiB - 8devices Jalapeno - AVM FRITZ!Box 4040 - Compex WPJ428 - Meraki MR33 Access Point - OpenMesh A42 * 14336 KiB - GL.iNet GL-B1300 - Qualcomm Technologies, Inc. IPQ40xx/AP-DK01.1-C1 Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Diffstat (limited to 'target/linux/ipq40xx/patches-4.14')
-rw-r--r--target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch27
1 files changed, 1 insertions, 26 deletions
diff --git a/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch b/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch
index e9d262069f..3043d63f3e 100644
--- a/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch
+++ b/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch
@@ -1,6 +1,6 @@
--- a/arch/arm/boot/dts/qcom-ipq4019-ap.dk01.1-c1.dts
+++ b/arch/arm/boot/dts/qcom-ipq4019-ap.dk01.1-c1.dts
-@@ -19,4 +19,112 @@
+@@ -19,4 +19,87 @@
/ {
model = "Qualcomm Technologies, Inc. IPQ40xx/AP-DK01.1-C1";
@@ -14,31 +14,6 @@
+ #size-cells = <0x1>;
+ ranges;
+
-+ apps_bl@87000000 {
-+ reg = <0x87000000 0x400000>;
-+ no-map;
-+ };
-+
-+ sbl@87400000 {
-+ reg = <0x87400000 0x100000>;
-+ no-map;
-+ };
-+
-+ cnss_debug@87500000 {
-+ reg = <0x87500000 0x600000>;
-+ no-map;
-+ };
-+
-+ cpu_context_dump@87b00000 {
-+ reg = <0x87b00000 0x080000>;
-+ no-map;
-+ };
-+
-+ tz_apps@87b80000 {
-+ reg = <0x87b80000 0x280000>;
-+ no-map;
-+ };
-+
+ smem@87e00000 {
+ reg = <0x87e00000 0x080000>;
+ no-map;