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| author | Tejas Bhumkar <tejas.arvind.bhumkar@amd.com> | 2023-10-20 10:36:22 +0530 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2023-11-07 13:47:09 +0100 |
| commit | 820bad0271939d93c2651b29f7ae8adb665a4dfe (patch) | |
| tree | e77dee394e43cb980276342f67ef5270a058da4c /arch | |
| parent | 3e891448920a8d53205d05e36372d65ae1289734 (diff) | |
| download | u-boot-820bad0271939d93c2651b29f7ae8adb665a4dfe.zip u-boot-820bad0271939d93c2651b29f7ae8adb665a4dfe.tar.gz u-boot-820bad0271939d93c2651b29f7ae8adb665a4dfe.tar.bz2 | |
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/20231020050622.972750-1-tejas.arvind.bhumkar@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/dts/zynqmp-sck-kv-g-revA.dtso | 25 | ||||
| -rw-r--r-- | arch/arm/dts/zynqmp-sck-kv-g-revB.dtso | 25 |
2 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso index 22e7d68..c4f1da9 100644 --- a/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso +++ b/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso @@ -190,6 +190,25 @@ &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"; @@ -345,6 +364,12 @@ }; }; +&gpio { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_gpio0_default>; +}; + &uart1 { status = "okay"; pinctrl-names = "default"; diff --git a/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso index eadc256..6c5e0e5 100644 --- a/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso +++ b/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso @@ -178,6 +178,25 @@ &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"; @@ -333,6 +352,12 @@ }; }; +&gpio { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_gpio0_default>; +}; + &uart1 { status = "okay"; pinctrl-names = "default"; |