* [PATCH 1/2] arm64: dts: marvell: mcbin: set SFP power limit
@ 2019-05-19 9:21 Baruch Siach
2019-05-19 9:21 ` [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: " Baruch Siach
0 siblings, 1 reply; 4+ messages in thread
From: Baruch Siach @ 2019-05-19 9:21 UTC (permalink / raw)
To: Jason Cooper, Andrew Lunn, Gregory Clement, Sebastian Hesselbarth
Cc: Baruch Siach, Russell King, linux-arm-kernel
The Macchitobin board is capable of supplying power up to 2A to SFP
modules. Make that explicit in the device-tree. Without this property
current kernel does not allow SFP modules that require more than 1A.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi
index 329f8ceeebea..70b495175c8e 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi
@@ -76,6 +76,7 @@
tx-fault-gpio = <&cp1_gpio1 26 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&cp1_sfpp0_pins>;
+ maximum-power-milliwatt = <2000>;
};
sfp_eth1: sfp-eth1 {
@@ -88,6 +89,7 @@
tx-fault-gpio = <&cp0_gpio2 30 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&cp1_sfpp1_pins &cp0_sfpp1_pins>;
+ maximum-power-milliwatt = <2000>;
};
sfp_eth3: sfp-eth3 {
@@ -100,6 +102,7 @@
tx-fault-gpio = <&cp0_gpio2 19 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&cp0_sfp_1g_pins &cp1_sfp_1g_pins>;
+ maximum-power-milliwatt = <2000>;
};
};
--
2.20.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: set SFP power limit
2019-05-19 9:21 [PATCH 1/2] arm64: dts: marvell: mcbin: set SFP power limit Baruch Siach
@ 2019-05-19 9:21 ` Baruch Siach
2019-05-19 18:20 ` Russell King - ARM Linux admin
0 siblings, 1 reply; 4+ messages in thread
From: Baruch Siach @ 2019-05-19 9:21 UTC (permalink / raw)
To: Jason Cooper, Andrew Lunn, Gregory Clement, Sebastian Hesselbarth
Cc: Baruch Siach, Russell King, linux-arm-kernel
The Clearfog GT-8K board is capable of supplying power up to 2A to SFP
modules. Make that explicit in the device-tree. Without this property
current kernel does not allow SFP modules that require more than 1A.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
index 9143aa13ceb1..f275d9420d5b 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
+++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
@@ -63,6 +63,7 @@
tx-disable-gpio = <&cp1_gpio1 29 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&cp0_sfp_present_pins &cp1_sfp_tx_disable_pins>;
+ maximum-power-milliwatt = <2000>;
};
leds {
--
2.20.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: set SFP power limit
2019-05-19 9:21 ` [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: " Baruch Siach
@ 2019-05-19 18:20 ` Russell King - ARM Linux admin
2019-05-19 18:25 ` Baruch Siach
0 siblings, 1 reply; 4+ messages in thread
From: Russell King - ARM Linux admin @ 2019-05-19 18:20 UTC (permalink / raw)
To: Baruch Siach
Cc: Andrew Lunn, Gregory Clement, Jason Cooper, linux-arm-kernel,
Sebastian Hesselbarth
On Sun, May 19, 2019 at 12:21:06PM +0300, Baruch Siach wrote:
> The Clearfog GT-8K board is capable of supplying power up to 2A to SFP
> modules. Make that explicit in the device-tree. Without this property
> current kernel does not allow SFP modules that require more than 1A.
I do hope you're aware that current is not the same thing as power!
You say above "2A" which is a current, but the maximum power figure
below is "2W". Given that modules are supplied with 3.3V, and
Power = Voltage x Current, this really doesn't work out!
Please can you correct both of your patches for accuracy in this
regard, thanks.
>
> Signed-off-by: Baruch Siach <baruch@tkos.co.il>
> ---
> arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> index 9143aa13ceb1..f275d9420d5b 100644
> --- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> @@ -63,6 +63,7 @@
> tx-disable-gpio = <&cp1_gpio1 29 GPIO_ACTIVE_HIGH>;
> pinctrl-names = "default";
> pinctrl-0 = <&cp0_sfp_present_pins &cp1_sfp_tx_disable_pins>;
> + maximum-power-milliwatt = <2000>;
> };
>
> leds {
> --
> 2.20.1
>
>
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: set SFP power limit
2019-05-19 18:20 ` Russell King - ARM Linux admin
@ 2019-05-19 18:25 ` Baruch Siach
0 siblings, 0 replies; 4+ messages in thread
From: Baruch Siach @ 2019-05-19 18:25 UTC (permalink / raw)
To: Russell King - ARM Linux admin
Cc: Andrew Lunn, Gregory Clement, Jason Cooper, linux-arm-kernel,
Sebastian Hesselbarth
Hi Russell,
On Sun, May 19 2019, Russell King wrote:
> On Sun, May 19, 2019 at 12:21:06PM +0300, Baruch Siach wrote:
>> The Clearfog GT-8K board is capable of supplying power up to 2A to SFP
>> modules. Make that explicit in the device-tree. Without this property
>> current kernel does not allow SFP modules that require more than 1A.
>
> I do hope you're aware that current is not the same thing as power!
> You say above "2A" which is a current, but the maximum power figure
> below is "2W". Given that modules are supplied with 3.3V, and
> Power = Voltage x Current, this really doesn't work out!
>
> Please can you correct both of your patches for accuracy in this
> regard, thanks.
My bad. I'll fix and resend.
Thanks for reviewing.
baruch
>> Signed-off-by: Baruch Siach <baruch@tkos.co.il>
>> ---
>> arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
>> index 9143aa13ceb1..f275d9420d5b 100644
>> --- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
>> +++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
>> @@ -63,6 +63,7 @@
>> tx-disable-gpio = <&cp1_gpio1 29 GPIO_ACTIVE_HIGH>;
>> pinctrl-names = "default";
>> pinctrl-0 = <&cp0_sfp_present_pins &cp1_sfp_tx_disable_pins>;
>> + maximum-power-milliwatt = <2000>;
>> };
>>
>> leds {
--
http://baruch.siach.name/blog/ ~. .~ Tk Open Systems
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-05-19 18:25 UTC | newest]
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2019-05-19 9:21 [PATCH 1/2] arm64: dts: marvell: mcbin: set SFP power limit Baruch Siach
2019-05-19 9:21 ` [PATCH 2/2] arm64: dts: marvell: clearfog-gt-8k: " Baruch Siach
2019-05-19 18:20 ` Russell King - ARM Linux admin
2019-05-19 18:25 ` Baruch Siach
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