From: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
The revision of the R8A7796 SoC on the M3ULCB board is ES1.0. This revision
can not use cpuidle for CA53 cores.
Therefore, this patch disables cpuidle support for CA53 cores.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Signed-off-by: Ulrich Hecht <uli+renesas@xxxxxxxx>
---
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 9e4594c..cf96675 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
@@ -14,6 +14,12 @@
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. */
@@ -26,6 +32,22 @@
};
};
+&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>,
--
2.7.4
