diff options
| author | Pawel Dembicki | 2025-11-01 22:26:20 +0000 |
|---|---|---|
| committer | Christian Marangi | 2025-11-04 22:19:27 +0000 |
| commit | 7e4ba852b6337f0700511fad116357cd7004cc36 (patch) | |
| tree | 14b3a26b194794a9558307e7e27c5cc187581585 | |
| parent | 2352de96c1c2fea34d31da24f8cbfc2faf6d820a (diff) | |
| download | openwrt-7e4ba852b6337f0700511fad116357cd7004cc36.tar.gz | |
layerscape: configure PHY reset GPIO on LS1012A-FRDM
On the LS1012A-FRDM both PHY reset pins are tied to GPIO1_23.
Up to Linux 6.6, pinctrl did not touch this GPIO and the reset
line remained in the state set by U-Boot. Starting from 6.12,
the kernel requires explicit configuration of this pin, otherwise
the PHYs fail to be detected.
This adds a gpio-hog node to ensure the reset line stays asserted,
fixing PHY detection on boot.
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20614
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
| -rw-r--r-- | target/linux/layerscape/patches-6.12/900-layerscape-dts-ls1012a-frdm-add-GPIO-hog-for-PHY-res.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-6.12/900-layerscape-dts-ls1012a-frdm-add-GPIO-hog-for-PHY-res.patch b/target/linux/layerscape/patches-6.12/900-layerscape-dts-ls1012a-frdm-add-GPIO-hog-for-PHY-res.patch new file mode 100644 index 0000000000..99a0dec0a8 --- /dev/null +++ b/target/linux/layerscape/patches-6.12/900-layerscape-dts-ls1012a-frdm-add-GPIO-hog-for-PHY-res.patch @@ -0,0 +1,36 @@ +From 3efb7aeefef62886be0dde83f6340d1a1bfcb5f6 Mon Sep 17 00:00:00 2001 +From: Pawel Dembicki <paweldembicki@gmail.com> +Date: Fri, 31 Oct 2025 22:46:05 +0100 +Subject: [PATCH] layerscape: dts: ls1012a-frdm: add GPIO hog for PHY reset + +On LS1012A-FRDM both PHY reset pins are tied to GPIO1_23 (active-low). +Older kernels preserved the U-Boot-configured level, but since 6.12 the +pin may default to an undefined state early in boot, leaving the PHYs in +reset and breaking detection. + +Add a GPIO hog on gpio1[23], configured as output-high, to keep the +reset line deasserted from early boot. + +Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com> +--- + arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts | 9 +++++++++ + 1 file changed, 9 insertions(+) + +--- a/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts ++++ b/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts +@@ -87,6 +87,15 @@ + status = "okay"; + }; + ++&gpio0 { ++ phy-reset-hog { ++ gpio-hog; ++ gpios = <23 1>; ++ output-low; ++ line-name = "phy-reset"; ++ }; ++}; ++ + &i2c0 { + status = "okay"; + |