Now that the zynqmp pinctrl driver supports the tri-state registers, make sure that the pins requiring output-enable are configured appropriately for SOMs.
Without it, all tristate setting for MIOs, which are not related to SOM itself, are using default configuration which is not correct setting. It means SDs, USBs, ethernet, etc. are not working properly.
In past it was fixed through calling tristate configuration via bootcmd: usb_init=mw 0xFF180208 2020 kv260_gem3=mw 0xFF18020C 0xFC0 && gpio toggle gpio@ff0a000038 && \ gpio toggle gpio@ff0a000038
Signed-off-by: Neal Frager neal.frager@amd.com --- arch/arm/dts/zynqmp-sck-kd-g-revA.dts | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/arm/dts/zynqmp-sck-kd-g-revA.dts b/arch/arm/dts/zynqmp-sck-kd-g-revA.dts index 56f3128528..ffdb60fa51 100644 --- a/arch/arm/dts/zynqmp-sck-kd-g-revA.dts +++ b/arch/arm/dts/zynqmp-sck-kd-g-revA.dts @@ -175,6 +175,7 @@ conf-tx { pins = "MIO36"; bias-disable; + output-enable; };
mux { @@ -220,12 +221,14 @@ conf-rx { pins = "MIO45", "MIO46", "MIO47", "MIO48"; bias-disable; + output-enable; low-power-disable; };
conf-bootstrap { pins = "MIO44", "MIO49"; bias-disable; + output-enable; low-power-disable; };
@@ -233,6 +236,7 @@ pins = "MIO38", "MIO39", "MIO40", "MIO41", "MIO42", "MIO43"; bias-disable; + output-enable; low-power-enable; };
@@ -241,6 +245,7 @@ slew-rate = <SLEW_RATE_SLOW>; power-source = <IO_STANDARD_LVCMOS18>; bias-disable; + output-enable; };
mux-mdio { @@ -271,6 +276,7 @@ pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59", "MIO60", "MIO61", "MIO62", "MIO63"; bias-disable; + output-enable; drive-strength = <4>; slew-rate = <SLEW_RATE_SLOW>; }; @@ -298,6 +304,7 @@ pins = "MIO66", "MIO68", "MIO69", "MIO70", "MIO71", "MIO72", "MIO73", "MIO74", "MIO75"; bias-disable; + output-enable; drive-strength = <4>; slew-rate = <SLEW_RATE_SLOW>; };