* [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver
@ 2018-04-24 3:01 ` Ooi, Joyce
0 siblings, 0 replies; 4+ messages in thread
From: Ooi, Joyce @ 2018-04-24 3:01 UTC (permalink / raw)
To: Dinh Nguyen, Rob Herring, Mark Rutland, Catalin Marinas, Will Deacon
Cc: devicetree, linux-arm-kernel, linux-kernel, Ooi Joyce,
See Chin Liang, Yves Vandervennet, Ong Hean Loong
The HPS EMAC0 drive strength is changed to 4mA because the initial 8mA
drive strength has caused CE test to fail. This requires changes on the
pad skew for EMAC0 PHY driver. Based on several measurements done, Tx
clock does not require the extra 0.96ns delay.
Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com>
---
.../boot/dts/altera/socfpga_stratix10_socdk.dts | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
index 0007564..8785f78 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
@@ -79,7 +79,7 @@
rxd2-skew-ps = <420>; /* 0ps */
rxd3-skew-ps = <420>; /* 0ps */
txen-skew-ps = <0>; /* -420ps */
- txc-skew-ps = <1860>; /* 960ps */
+ txc-skew-ps = <900>; /* 0ps */
rxdv-skew-ps = <420>; /* 0ps */
rxc-skew-ps = <1680>; /* 780ps */
};
--
1.7.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver
@ 2018-04-24 3:01 ` Ooi, Joyce
0 siblings, 0 replies; 4+ messages in thread
From: Ooi, Joyce @ 2018-04-24 3:01 UTC (permalink / raw)
To: linux-arm-kernel
The HPS EMAC0 drive strength is changed to 4mA because the initial 8mA
drive strength has caused CE test to fail. This requires changes on the
pad skew for EMAC0 PHY driver. Based on several measurements done, Tx
clock does not require the extra 0.96ns delay.
Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com>
---
.../boot/dts/altera/socfpga_stratix10_socdk.dts | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
index 0007564..8785f78 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
@@ -79,7 +79,7 @@
rxd2-skew-ps = <420>; /* 0ps */
rxd3-skew-ps = <420>; /* 0ps */
txen-skew-ps = <0>; /* -420ps */
- txc-skew-ps = <1860>; /* 960ps */
+ txc-skew-ps = <900>; /* 0ps */
rxdv-skew-ps = <420>; /* 0ps */
rxc-skew-ps = <1680>; /* 780ps */
};
--
1.7.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver
2018-04-24 3:01 ` Ooi, Joyce
@ 2018-04-24 15:13 ` Dinh Nguyen
-1 siblings, 0 replies; 4+ messages in thread
From: Dinh Nguyen @ 2018-04-24 15:13 UTC (permalink / raw)
To: Ooi, Joyce, Rob Herring, Mark Rutland, Catalin Marinas, Will Deacon
Cc: devicetree, linux-arm-kernel, linux-kernel, See Chin Liang,
Yves Vandervennet, Ong Hean Loong
On 04/23/2018 10:01 PM, Ooi, Joyce wrote:
> The HPS EMAC0 drive strength is changed to 4mA because the initial 8mA
> drive strength has caused CE test to fail. This requires changes on the
> pad skew for EMAC0 PHY driver. Based on several measurements done, Tx
> clock does not require the extra 0.96ns delay.
>
> Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com>
> ---
> .../boot/dts/altera/socfpga_stratix10_socdk.dts | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> index 0007564..8785f78 100644
> --- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> @@ -79,7 +79,7 @@
> rxd2-skew-ps = <420>; /* 0ps */
> rxd3-skew-ps = <420>; /* 0ps */
> txen-skew-ps = <0>; /* -420ps */
> - txc-skew-ps = <1860>; /* 960ps */
> + txc-skew-ps = <900>; /* 0ps */
> rxdv-skew-ps = <420>; /* 0ps */
> rxc-skew-ps = <1680>; /* 780ps */
> };
>
Applied, thanks!
Dinh
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver
@ 2018-04-24 15:13 ` Dinh Nguyen
0 siblings, 0 replies; 4+ messages in thread
From: Dinh Nguyen @ 2018-04-24 15:13 UTC (permalink / raw)
To: linux-arm-kernel
On 04/23/2018 10:01 PM, Ooi, Joyce wrote:
> The HPS EMAC0 drive strength is changed to 4mA because the initial 8mA
> drive strength has caused CE test to fail. This requires changes on the
> pad skew for EMAC0 PHY driver. Based on several measurements done, Tx
> clock does not require the extra 0.96ns delay.
>
> Signed-off-by: Ooi, Joyce <joyce.ooi@intel.com>
> ---
> .../boot/dts/altera/socfpga_stratix10_socdk.dts | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> index 0007564..8785f78 100644
> --- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> @@ -79,7 +79,7 @@
> rxd2-skew-ps = <420>; /* 0ps */
> rxd3-skew-ps = <420>; /* 0ps */
> txen-skew-ps = <0>; /* -420ps */
> - txc-skew-ps = <1860>; /* 960ps */
> + txc-skew-ps = <900>; /* 0ps */
> rxdv-skew-ps = <420>; /* 0ps */
> rxc-skew-ps = <1680>; /* 780ps */
> };
>
Applied, thanks!
Dinh
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-04-24 15:13 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2018-04-24 3:01 [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver Ooi, Joyce
2018-04-24 3:01 ` Ooi, Joyce
2018-04-24 15:13 ` Dinh Nguyen
2018-04-24 15:13 ` Dinh Nguyen
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