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Message-ID: <48fd88f29482fc1b94439727b2d2484f@risingedge.co.za>
Date: Thu, 07 Mar 2024 16:58:43 +0200
From: Justin Swartz <justin.swartz@...ingedge.co.za>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Arınç ÜNAL <arinc.unal@...nc9.com>, Sergio
Paracuellos <sergio.paracuellos@...il.com>, Rob Herring
<robh+dt@...nel.org>, Krzysztof Kozlowski
<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Matthias Brugger
<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>, linux-mips@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] mips: dts: ralink: mt7621: add cell count properties to
usb0
Hi Krzysztof
On 2024-03-07 10:01, Krzysztof Kozlowski wrote:
> On 06/03/2024 21:21, Justin Swartz wrote:
>> Add default #address-cells and #size-cells properties to usb0,
>> suitable for hubs and devices without explicitly declared
>> interface nodes, as:
>>
>> "#address-cells":
>> description: should be 1 for hub nodes with device nodes,
>> should be 2 for device nodes with interface nodes.
>> enum: [1, 2]
>>
>> "#size-cells":
>> const: 0
>>
>> -- from Documentation/devicetree/bindings/usb/usb-device.yaml
>>
>> Signed-off-by: Justin Swartz <justin.swartz@...ingedge.co.za>
>> ---
>> arch/mips/boot/dts/ralink/mt7621.dtsi | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/mips/boot/dts/ralink/mt7621.dtsi
>> b/arch/mips/boot/dts/ralink/mt7621.dtsi
>> index 2069249c8..f02965db1 100644
>> --- a/arch/mips/boot/dts/ralink/mt7621.dtsi
>> +++ b/arch/mips/boot/dts/ralink/mt7621.dtsi
>> @@ -309,6 +309,9 @@ usb: usb@...c0000 {
>>
>> interrupt-parent = <&gic>;
>> interrupts = <GIC_SHARED 22 IRQ_TYPE_LEVEL_HIGH>;
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>
> Doesn't this bring new W=1 warnings?
For a fresh build (make O=build clean; make O=build W=1): I do not
receive any warnings regarding mt7621.dtsi or my board's .dts file. I
added these properties to the usb node because I had received warnings
about a child node for a permenantly-connected/onboard hub:
--%--
/ {
...
usb_fixed_5v0: regulator {
compatible = "regulator-fixed";
regulator-name = "usb_vbus";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-boot-on;
regulator-always-on;
};
usb_fixed_3v3: regulator {
compatible = "regulator-fixed";
regulator-name = "usb_vusb33";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
};
};
&usb {
usb3-lpm-capable;
vbus-supply = <&usb_fixed_5v0>;
vusb33-supply = <&usb_fixed_3v3>;
hub: hub@0 {
compatible = "usb5e3,608";
reg = <1>;
};
};
--%--
If the #address-cells and #size-cells properties are removed from the
usb node, the following warnings are generated:
$ make O=build W=1 dtbs
make[1]: Entering directory
'/home/user/projects/xfl-mt7621/src/linux/build'
GEN Makefile
CALL ../scripts/checksyscalls.sh
DTC arch/mips/boot/dts/ralink/mt7621-client-product.dtb
./arch/mips/boot/dts/ralink/mt7621-client-product.dts:276.3-13: Warning
(reg_format): /usb@...c0000/hub@0:reg: property has invalid length (4
bytes) (#address-cells == 2, #size-cells == 1)
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(pci_device_reg): Failed prerequisite 'reg_format'
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(pci_device_bus_num): Failed prerequisite 'reg_format'
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(simple_bus_reg): Failed prerequisite 'reg_format'
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(i2c_bus_reg): Failed prerequisite 'reg_format'
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(spi_bus_reg): Failed prerequisite 'reg_format'
./arch/mips/boot/dts/ralink/mt7621-client-product.dts:274.13-277.4:
Warning (avoid_default_addr_size): /usb@...c0000/hub@0: Relying on
default #address-cells value
./arch/mips/boot/dts/ralink/mt7621-client-product.dts:274.13-277.4:
Warning (avoid_default_addr_size): /usb@...c0000/hub@0: Relying on
default #size-cells value
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(avoid_unnecessary_addr_size): Failed prerequisite
'avoid_default_addr_size'
arch/mips/boot/dts/ralink/mt7621-client-product.dtb: Warning
(unique_unit_address_if_enabled): Failed prerequisite
'avoid_default_addr_size'
DTC arch/mips/boot/dts/ralink/mt7621-gnubee-gb-pc1.dtb
DTC arch/mips/boot/dts/ralink/mt7621-gnubee-gb-pc2.dtb
DTC arch/mips/boot/dts/ralink/mt7621-tplink-hc220-g5-v1.dtb
make[1]: Leaving directory
'/home/user/projects/xfl-mt7621/src/linux/build'
If I add add them back to the usb node, this is the result:
$ make O=build W=1 dtbs
make[1]: Entering directory
'/home/user/projects/xfl-mt7621/src/linux/build'
GEN Makefile
CALL ../scripts/checksyscalls.sh
DTC arch/mips/boot/dts/ralink/mt7621-client-product.dtb
DTC arch/mips/boot/dts/ralink/mt7621-gnubee-gb-pc1.dtb
DTC arch/mips/boot/dts/ralink/mt7621-gnubee-gb-pc2.dtb
DTC arch/mips/boot/dts/ralink/mt7621-tplink-hc220-g5-v1.dtb
make[1]: Leaving directory
'/home/user/projects/xfl-mt7621/src/linux/build'
> Best regards,
> Krzysztof
Regards
Justin
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