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authorNeil Armstrong <narmstrong@baylibre.com>2017-01-06 09:04:32 +0100
committerOlof Johansson <olof@lixom.net>2017-01-17 12:10:54 -0800
commitf7bcd4b6f6983d668b057dc166799716690423a4 (patch)
treed38f030f58d6e3494996968499e47804503aa405 /arch
parent941d3156e9a5d6826b17d451ccac876aa2f7a0d2 (diff)
downloadlinux-f7bcd4b6f6983d668b057dc166799716690423a4.tar.bz2
ARM64: dts: meson-gxbb-odroidc2: Disable SCPI DVFS
The current hardware is not able to run with all cores enabled at a cluster frequency superior at 1536MHz. But the currently shipped u-boot for the platform still reports an OPP table with possible DVFS frequency up to 2GHz, and will not change since the off-tree linux tree supports limiting the OPPs with a kernel parameter. A recent u-boot change reports the boot-time DVFS around 100MHz and the default performance cpufreq governor sets the maximum frequency. Previous version of u-boot reported to be already at the max OPP and left the OPP as is. Nevertheless, other governors like ondemand could setup the max frequency and make the system crash. This patch disables the DVFS clock and disables cpufreq. Fixes: 70db166a2baa ("ARM64: dts: meson-gxbb: Add SCPI with cpufreq & sensors Nodes") Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts4
-rw-r--r--arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi2
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
index 238fbeacd330..5d28e1cdc998 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
@@ -137,6 +137,10 @@
};
};
+&scpi_clocks {
+ status = "disabled";
+};
+
&uart_AO {
status = "okay";
pinctrl-0 = <&uart_ao_a_pins>;
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 596240c38a9c..b35307321b63 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -55,7 +55,7 @@
mboxes = <&mailbox 1 &mailbox 2>;
shmem = <&cpu_scp_lpri &cpu_scp_hpri>;
- clocks {
+ scpi_clocks: clocks {
compatible = "arm,scpi-clocks";
scpi_dvfs: scpi_clocks@0 {