[PATCH v2 0/2] arm64: dts: freescale: sl28: fix RGMII

[PATCH v2 0/2] arm64: dts: freescale: sl28: fix RGMII

[Michael Walle]

This fixes the RGMII on the sl28 boards. While the network port was
actually working it is still out-of-spec.

Please note, that this is split into two patches because each one fixes
a different commit.

Changes since v1:
  - use different subjects for the two patches. I didn't use sl28-varN
	because I'd like to keep "sl28:" for all the sl28 related patches.

Michael Walle (2):
  arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage
  arm64: dts: freescale: sl28: var1: fix RGMII clock and voltage

 .../boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts     | 3 ++-
 .../boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts     | 5 ++---
 2 files changed, 4 insertions(+), 4 deletions(-)

-- 
2.20.1


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[PATCH v2 1/2] arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage

[Michael Walle]

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>
---
 .../boot/dts/freescale/fsl-ls1028a-kontron-sl28-var4.dts     | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

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 df212ed5bb94..e65d1c477e2c 100644
--- 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";
-- 
2.20.1


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[PATCH v2 2/2] arm64: dts: freescale: sl28: var1: fix RGMII clock and voltage

[Michael Walle]

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-var1.dts.

Fixes: 642856097c18 ("arm64: dts: freescale: sl28: add variant 1")
Signed-off-by: Michael Walle <michael@walle.cc>
---
 .../arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
index 6c309b97587d..e8d31279b7a3 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
@@ -46,7 +46,8 @@
 			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";
-- 
2.20.1


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Re: [PATCH v2 0/2] arm64: dts: freescale: sl28: fix RGMII

[Shawn Guo]

On Fri, May 14, 2021 at 08:55:51PM +0200, Michael Walle wrote:
> This fixes the RGMII on the sl28 boards. While the network port was
> actually working it is still out-of-spec.
> 
> Please note, that this is split into two patches because each one fixes
> a different commit.
> 
> Changes since v1:
>   - use different subjects for the two patches. I didn't use sl28-varN
> 	because I'd like to keep "sl28:" for all the sl28 related patches.
> 
> Michael Walle (2):
>   arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage
>   arm64: dts: freescale: sl28: var1: fix RGMII clock and voltage

Applied both, thanks.

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