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arm64: dts: imx8mn-var-som: add missing pull-up for onboard PHY reset pinmux
For SOMs with an onboard PHY, the RESET_N pull-up resistor is
currently deactivated in the pinmux configuration. When the pinmux
code selects the GPIO function for this pin, with a default direction
of input, this prevents the RESET_N pin from being taken to the proper
3.3V level (deasserted), and this results in the PHY being not
detected since it is held in reset.
Taken from RESET_N pin description in ADIN13000 datasheet:
This pin requires a 1K pull-up resistor to AVDD_3P3.
Activate the pull-up resistor to fix the issue.
Fixes: ade0176dd8
("arm64: dts: imx8mn-var-som: Add Variscite VAR-SOM-MX8MN System on Module")
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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1 changed files with 1 additions and 1 deletions
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@ -358,7 +358,7 @@ MX8MN_IOMUXC_ENET_TXC_ENET1_RGMII_TXC 0x1f
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MX8MN_IOMUXC_ENET_RXC_ENET1_RGMII_RXC 0x91
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MX8MN_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL 0x91
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MX8MN_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL 0x1f
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MX8MN_IOMUXC_GPIO1_IO09_GPIO1_IO9 0x19
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MX8MN_IOMUXC_GPIO1_IO09_GPIO1_IO9 0x159
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>;
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};
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