summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorPetr Benes <petr.benes@ysoft.com>2022-10-04 17:39:20 +0200
committerShawn Guo <shawnguo@kernel.org>2022-10-29 16:26:31 +0800
commit5e67d47d0b010f0704aca469d6d27637b1dcb2ce (patch)
tree6b078313a04a4f786744456876236a2c7bd6de16 /arch
parentbb5ad73941dc3f4e3c2241348f385da6501d50ea (diff)
downloadlinux-stable-5e67d47d0b010f0704aca469d6d27637b1dcb2ce.tar.gz
linux-stable-5e67d47d0b010f0704aca469d6d27637b1dcb2ce.tar.bz2
linux-stable-5e67d47d0b010f0704aca469d6d27637b1dcb2ce.zip
ARM: dts: imx6dl-yapp4: Do not allow PM to switch PU regulator off on Q/QP
Fix our design flaw in supply voltage distribution on the Quad and QuadPlus based boards. The problem is that we supply the SoC cache (VDD_CACHE_CAP) from VDD_PU instead of VDD_SOC. The VDD_PU internal regulator can be disabled by PM if VPU or GPU is not used. If that happens the system freezes. To prevent that configure the reg_pu regulator to be always on. Fixes: 0de4ab81ab26 ("ARM: dts: imx6dl-yapp4: Add Y Soft IOTA Crux/Crux+ board") Cc: petrben@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Petr Benes <petr.benes@ysoft.com> Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/boot/dts/imx6q-yapp4-crux.dts4
-rw-r--r--arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts4
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/imx6q-yapp4-crux.dts b/arch/arm/boot/dts/imx6q-yapp4-crux.dts
index 15f4824a5142..bddf3822ebf7 100644
--- a/arch/arm/boot/dts/imx6q-yapp4-crux.dts
+++ b/arch/arm/boot/dts/imx6q-yapp4-crux.dts
@@ -33,6 +33,10 @@
status = "okay";
};
+&reg_pu {
+ regulator-always-on;
+};
+
&reg_usb_h1_vbus {
status = "okay";
};
diff --git a/arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts b/arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts
index cea165f2161a..afaf4a6759d4 100644
--- a/arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts
+++ b/arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts
@@ -33,6 +33,10 @@
status = "okay";
};
+&reg_pu {
+ regulator-always-on;
+};
+
&reg_usb_h1_vbus {
status = "okay";
};