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| author |   Petr Benes <petr.benes@ysoft.com> | 2022-10-04 17:39:20 +0200 |
|---|---|---|
| committer |   Shawn Guo <shawnguo@kernel.org> | 2022-10-29 16:26:31 +0800 |
| commit | 5e67d47d0b010f0704aca469d6d27637b1dcb2ce (patch) | |
| tree | 6b078313a04a4f786744456876236a2c7bd6de16 /arch/arm | |
| parent | ARM: dts: imx6qdl-gw59{10,13}: fix user pushbutton GPIO offset (diff) | |
| download | linux-dev-5e67d47d0b010f0704aca469d6d27637b1dcb2ce.tar.xz linux-dev-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/arm')
| -rw-r--r-- | arch/arm/boot/dts/imx6q-yapp4-crux.dts | 4 | ||||
| -rw-r--r-- | arch/arm/boot/dts/imx6qp-yapp4-crux-plus.dts | 4 |
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"; }; +®_pu { + regulator-always-on; +}; + ®_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"; }; +®_pu { + regulator-always-on; +}; + ®_usb_h1_vbus { status = "okay"; }; |