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-rw-r--r--meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0001-arm64-dts-r8a7796-m3ulcb-Disable-CPUIdle-support-for.patch58
-rw-r--r--meta-rcar-gen3/recipes-kernel/linux/linux-renesas_4.14.bb5
2 files changed, 63 insertions, 0 deletions
diff --git a/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0001-arm64-dts-r8a7796-m3ulcb-Disable-CPUIdle-support-for.patch b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0001-arm64-dts-r8a7796-m3ulcb-Disable-CPUIdle-support-for.patch
new file mode 100644
index 0000000..9c8b675
--- /dev/null
+++ b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0001-arm64-dts-r8a7796-m3ulcb-Disable-CPUIdle-support-for.patch
@@ -0,0 +1,58 @@
+From 97359593cdd25e46e63b46d86d1a0ea742cf6ae8 Mon Sep 17 00:00:00 2001
+From: Takeshi Kihara <takeshi.kihara.df@renesas.com>
+Date: Fri, 19 Jan 2018 18:24:25 +0900
+Subject: [PATCH] arm64: dts: r8a7796-m3ulcb: Disable CPUIdle support for CA53
+
+The revision of M3ULCB board on the R8A7796 SoC is ES1.0. This revision
+can not use CPUIdle for CA53 cores.
+
+Therefore, this patch disables CPUIdle support for CA53.
+
+Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
+---
+ arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts | 22 ++++++++++++++++++++++
+ 1 file changed, 22 insertions(+)
+
+diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+index 10d6f24e60fb..0ac6a1024d96 100644
+--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
++++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+@@ -17,6 +17,12 @@
+ model = "Renesas M3ULCB board based on r8a7796";
+ compatible = "renesas,m3ulcb", "renesas,r8a7796";
+
++ cpus {
++ idle-states {
++ /delete-node/ cpu-sleep-1;
++ };
++ };
++
+ memory@48000000 {
+ device_type = "memory";
+ /* first 128MB is reserved for secure area. */
+@@ -69,6 +75,22 @@
+ };
+ };
+
++&a53_0 {
++ /delete-property/ cpu-idle-states;
++};
++
++&a53_1 {
++ /delete-property/ cpu-idle-states;
++};
++
++&a53_2 {
++ /delete-property/ cpu-idle-states;
++};
++
++&a53_3 {
++ /delete-property/ cpu-idle-states;
++};
++
+ &du {
+ clocks = <&cpg CPG_MOD 724>,
+ <&cpg CPG_MOD 723>,
+--
+2.15.1
+
diff --git a/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_4.14.bb b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_4.14.bb
index 31695e0..a113042 100644
--- a/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_4.14.bb
+++ b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_4.14.bb
@@ -27,6 +27,11 @@ SRC_URI_append = " \
${@bb.utils.contains('MACHINE_FEATURES','cas','file://capacity_aware_migration_strategy.cfg','',d)} \
"
+# Disable CPUIdle support for CA53 in M3ULCB ES1.0
+SRC_URI_append = " \
+ file://0001-arm64-dts-r8a7796-m3ulcb-Disable-CPUIdle-support-for.patch \
+"
+
# Install USB3.0 firmware to rootfs
USB3_FIRMWARE_V2 = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/r8a779x_usb3_v2.dlmem;md5sum=645db7e9056029efa15f158e51cc8a11"
USB3_FIRMWARE_V3 = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/r8a779x_usb3_v3.dlmem;md5sum=687d5d42f38f9850f8d5a6071dca3109"