arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage

BugLink: https://bugs.launchpad.net/bugs/1933691
[ Upstream commit 25201269c6ec3e9398426962ccdd55428261f7d0 ]

During hardware validation it was noticed that the clock isn't
continuously enabled when there is no link. This is because the 125MHz
clock is derived from the internal PLL which seems to go into some kind
of power-down mode every once in a while. The LS1028A expects a contiuous
clock. Thus enable the PLL all the time.

Also, the RGMII pad voltage is wrong. It was configured to 2.5V (that is
the VDDH regulator). The correct voltage is 1.8V, i.e. the VDDIO
regulator.

This fix is for the freescale/fsl-ls1028a-kontron-sl28-var4.dts.

Fixes: 815364d0424e ("arm64: dts: freescale: add Kontron sl28 support")
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts
index df212ed5bb9422bd17618b8efae0cb2d536c1271..e65d1c477e2ceb38509e121f4931114e31718c90 100644 (file)
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts
@@ -31,11 +31,10 @@
                        reg = <0x4>;
                        eee-broken-1000t;
                        eee-broken-100tx;
-
                        qca,clk-out-frequency = <125000000>;
                        qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
-
-                       vddio-supply = <&vddh>;
+                       qca,keep-pll-enabled;
+                       vddio-supply = <&vddio>;
 
                        vddio: vddio-regulator {
                                regulator-name = "VDDIO";