diff options
| author | Tejas Bhumkar <tejas.arvind.bhumkar@amd.com> | 2024-01-08 18:39:22 +0300 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2024-01-22 16:10:10 +0300 |
| commit | ea470fe330d5ebcfe490dfb73c2ee39b10520828 (patch) | |
| tree | 7b852de325262892e23534217a3f1b1788226997 | |
| parent | 24e85ff034a38cd27939272a2318d3db9fa92161 (diff) | |
| download | linux-ea470fe330d5ebcfe490dfb73c2ee39b10520828.tar.xz | |
arm64: zynqmp: Disable Tri-state for MIO38 Pin
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>
| -rw-r--r-- | arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 25 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso | 25 |
2 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso index b7b94254cc09..585b5845a1f4 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso +++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso @@ -169,6 +169,25 @@ &pinctrl0 { status = "okay"; + pinctrl_gpio0_default: gpio0-default { + conf { + groups = "gpio0_38_grp"; + bias-pull-up; + power-source = <IO_STANDARD_LVCMOS18>; + }; + + mux { + groups = "gpio0_38_grp"; + function = "gpio0"; + }; + + conf-tx { + pins = "MIO38"; + bias-disable; + output-enable; + }; + }; + pinctrl_uart1_default: uart1-default { conf { groups = "uart1_9_grp"; @@ -324,6 +343,12 @@ }; }; +&gpio { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_gpio0_default>; +}; + &uart1 { status = "okay"; pinctrl-names = "default"; diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso index 1446c2b19de7..037f0941ba0b 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso +++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso @@ -152,6 +152,25 @@ &pinctrl0 { status = "okay"; + pinctrl_gpio0_default: gpio0-default { + conf { + groups = "gpio0_38_grp"; + bias-pull-up; + power-source = <IO_STANDARD_LVCMOS18>; + }; + + mux { + groups = "gpio0_38_grp"; + function = "gpio0"; + }; + + conf-tx { + pins = "MIO38"; + bias-disable; + output-enable; + }; + }; + pinctrl_uart1_default: uart1-default { conf { groups = "uart1_9_grp"; @@ -307,6 +326,12 @@ }; }; +&gpio { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_gpio0_default>; +}; + &uart1 { status = "okay"; pinctrl-names = "default"; |