arm64: zynqmp: Disable Tri-state for MIO38 Pin

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gpio38 is used in SOM's kv260 to reset the Ethernet PHY.
At present, HW reset is not working properly as Tri-state 
is enabled for MIO38, causing inappropriate PHY register reads.

Disabled Tri-state for MIO38 to make HW reset work.

Tri-state disable :
ZynqMP> md 0xFF180208 2
ff180208: 00bfe7a3 00000540

Tri-state enable :
ZynqMP> md 0xFF180208 2
ff180208: 00bfe7e3 00000540

Signed-off-by: Tejas Bhumkar <tejas.arvind.bhumkar@amd.com>
Link: https://lore.kernel.org/r/9f8a0687be407a8ffad610087074e94ebc4f5982.1704728353.git.michal.simek@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

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This commit is contained in:

Tejas Bhumkar 2024-01-08 16:39:22 +01:00 • committed by Michal Simek

parent 24e85ff034

commit ea470fe330

2 changed files with 50 additions and 0 deletions

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arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso

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25

arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso

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