Re: [PATCH v5 1/3] ARM: dts: tegra: Remove skeleton.dtsi and fix DTC warnings for /memory

From: Krzysztof Kozlowski
Date: Wed May 23 2018 - 02:11:35 EST

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On Thu, May 17, 2018 at 1:39 PM, Stefan Agner <stefan@xxxxxxxx> wrote:
> On 17.05.2018 09:45, Krzysztof Kozlowski wrote:
>> Remove the usage of skeleton.dtsi and add necessary properties to /memory
>> node to fix the DTC warnings:
>>
>> arch/arm/boot/dts/tegra20-harmony.dtb: Warning (unit_address_vs_reg):
>> /memory: node has a reg or ranges property, but no unit name
>>
>> The DTB after the change is the same as before except adding
>> unit-address to /memory node.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
>>
>> ---
>>
>> Changes since v4:
>> 1. None
>> ---
>> arch/arm/boot/dts/tegra114-dalmore.dts | 3 ++-
>> arch/arm/boot/dts/tegra114-roth.dts | 3 ++-
>> arch/arm/boot/dts/tegra114-tn7.dts | 3 ++-
>> arch/arm/boot/dts/tegra114.dtsi | 4 ++--
>> arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra124-apalis.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra124-jetson-tk1.dts | 3 ++-
>> arch/arm/boot/dts/tegra124-nyan.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra124-venice2.dts | 3 ++-
>> arch/arm/boot/dts/tegra124.dtsi | 2 --
>> arch/arm/boot/dts/tegra20-colibri-512.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra20-harmony.dts | 3 ++-
>> arch/arm/boot/dts/tegra20-paz00.dts | 3 ++-
>> arch/arm/boot/dts/tegra20-seaboard.dts | 3 ++-
>> arch/arm/boot/dts/tegra20-tamonten.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra20-trimslice.dts | 3 ++-
>> arch/arm/boot/dts/tegra20-ventana.dts | 3 ++-
>> arch/arm/boot/dts/tegra20.dtsi | 7 +++++--
>> arch/arm/boot/dts/tegra30-apalis.dtsi | 5 +++++
>> arch/arm/boot/dts/tegra30-beaver.dts | 3 ++-
>> arch/arm/boot/dts/tegra30-cardhu.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra30-colibri.dtsi | 3 ++-
>> arch/arm/boot/dts/tegra30.dtsi | 7 +++++--
>> 23 files changed, 53 insertions(+), 26 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts
>> b/arch/arm/boot/dts/tegra114-dalmore.dts
>> index eafff16765b4..5cdcedfc19cb 100644
>> --- a/arch/arm/boot/dts/tegra114-dalmore.dts
>> +++ b/arch/arm/boot/dts/tegra114-dalmore.dts
>> @@ -23,7 +23,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> reg = <0x80000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra114-roth.dts
>> b/arch/arm/boot/dts/tegra114-roth.dts
>> index 7ed7370ee67a..b4f329a07c60 100644
>> --- a/arch/arm/boot/dts/tegra114-roth.dts
>> +++ b/arch/arm/boot/dts/tegra114-roth.dts
>> @@ -28,7 +28,8 @@
>> };
>> };
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> /* memory >= 0x79600000 is reserved for firmware usage */
>> reg = <0x80000000 0x79600000>;
>> };
>> diff --git a/arch/arm/boot/dts/tegra114-tn7.dts
>> b/arch/arm/boot/dts/tegra114-tn7.dts
>> index 7fc4a8b31e45..12092d344ce8 100644
>> --- a/arch/arm/boot/dts/tegra114-tn7.dts
>> +++ b/arch/arm/boot/dts/tegra114-tn7.dts
>> @@ -28,7 +28,8 @@
>> };
>> };
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> /* memory >= 0x37e00000 is reserved for firmware usage */
>> reg = <0x80000000 0x37e00000>;
>> };
>> diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
>> index 0e4a13295d8a..b917784d3f97 100644
>> --- a/arch/arm/boot/dts/tegra114.dtsi
>> +++ b/arch/arm/boot/dts/tegra114.dtsi
>> @@ -5,11 +5,11 @@
>> #include <dt-bindings/pinctrl/pinctrl-tegra.h>
>> #include <dt-bindings/interrupt-controller/arm-gic.h>
>>
>> -#include "skeleton.dtsi"
>> -
>> / {
>> compatible = "nvidia,tegra114";
>> interrupt-parent = <&lic>;
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>>
>> host1x@50000000 {
>> compatible = "nvidia,tegra114-host1x", "simple-bus";
>> diff --git a/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
>> b/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
>> index bb67edb016c5..80b52c612891 100644
>> --- a/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
>> +++ b/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
>> @@ -15,7 +15,8 @@
>> compatible = "toradex,apalis-tk1-v1.2", "toradex,apalis-tk1",
>> "nvidia,tegra124";
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x0 0x80000000 0x0 0x80000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra124-apalis.dtsi
>> b/arch/arm/boot/dts/tegra124-apalis.dtsi
>> index 65a2161b9b8e..3ca7601cafe9 100644
>> --- a/arch/arm/boot/dts/tegra124-apalis.dtsi
>> +++ b/arch/arm/boot/dts/tegra124-apalis.dtsi
>> @@ -50,7 +50,8 @@
>> model = "Toradex Apalis TK1";
>> compatible = "toradex,apalis-tk1", "nvidia,tegra124";
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x0 0x80000000 0x0 0x80000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>> b/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>> index 6dbcf84dafbc..8d9e6ee6c6a7 100644
>> --- a/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>> +++ b/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>> @@ -24,7 +24,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x0 0x80000000 0x0 0x80000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra124-nyan.dtsi
>> b/arch/arm/boot/dts/tegra124-nyan.dtsi
>> index 3609367037a6..15a2b0e3237e 100644
>> --- a/arch/arm/boot/dts/tegra124-nyan.dtsi
>> +++ b/arch/arm/boot/dts/tegra124-nyan.dtsi
>> @@ -13,7 +13,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x0 0x80000000 0x0 0x80000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra124-venice2.dts
>> b/arch/arm/boot/dts/tegra124-venice2.dts
>> index 89bcc178994d..241cdc4b6600 100644
>> --- a/arch/arm/boot/dts/tegra124-venice2.dts
>> +++ b/arch/arm/boot/dts/tegra124-venice2.dts
>> @@ -18,7 +18,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x0 0x80000000 0x0 0x80000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
>> index 174092bfac90..df1642876a4c 100644
>> --- a/arch/arm/boot/dts/tegra124.dtsi
>> +++ b/arch/arm/boot/dts/tegra124.dtsi
>> @@ -7,8 +7,6 @@
>> #include <dt-bindings/reset/tegra124-car.h>
>> #include <dt-bindings/thermal/tegra124-soctherm.h>
>>
>> -#include "skeleton.dtsi"
>> -
>> / {
>> compatible = "nvidia,tegra124";
>> interrupt-parent = <&lic>;
>> diff --git a/arch/arm/boot/dts/tegra20-colibri-512.dtsi
>> b/arch/arm/boot/dts/tegra20-colibri-512.dtsi
>> index 5c202b3e3bb1..305efb275b48 100644
>> --- a/arch/arm/boot/dts/tegra20-colibri-512.dtsi
>> +++ b/arch/arm/boot/dts/tegra20-colibri-512.dtsi
>> @@ -10,7 +10,8 @@
>> rtc1 = "/rtc@7000e000";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x20000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-harmony.dts
>> b/arch/arm/boot/dts/tegra20-harmony.dts
>> index 628a55a9318b..5009a55ae15c 100644
>> --- a/arch/arm/boot/dts/tegra20-harmony.dts
>> +++ b/arch/arm/boot/dts/tegra20-harmony.dts
>> @@ -18,7 +18,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-paz00.dts
>> b/arch/arm/boot/dts/tegra20-paz00.dts
>> index 30436969adc0..e794ac5442ef 100644
>> --- a/arch/arm/boot/dts/tegra20-paz00.dts
>> +++ b/arch/arm/boot/dts/tegra20-paz00.dts
>> @@ -19,7 +19,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x20000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-seaboard.dts
>> b/arch/arm/boot/dts/tegra20-seaboard.dts
>> index 284aae351ff2..6cb832cfa4f3 100644
>> --- a/arch/arm/boot/dts/tegra20-seaboard.dts
>> +++ b/arch/arm/boot/dts/tegra20-seaboard.dts
>> @@ -18,7 +18,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-tamonten.dtsi
>> b/arch/arm/boot/dts/tegra20-tamonten.dtsi
>> index 872046d48709..6ceb1228fed3 100644
>> --- a/arch/arm/boot/dts/tegra20-tamonten.dtsi
>> +++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi
>> @@ -15,7 +15,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x20000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-trimslice.dts
>> b/arch/arm/boot/dts/tegra20-trimslice.dts
>> index d55c6b240a30..3f94be3da9e5 100644
>> --- a/arch/arm/boot/dts/tegra20-trimslice.dts
>> +++ b/arch/arm/boot/dts/tegra20-trimslice.dts
>> @@ -18,7 +18,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20-ventana.dts
>> b/arch/arm/boot/dts/tegra20-ventana.dts
>> index ee3fbf941e79..c897a90289bc 100644
>> --- a/arch/arm/boot/dts/tegra20-ventana.dts
>> +++ b/arch/arm/boot/dts/tegra20-ventana.dts
>> @@ -18,7 +18,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@0 {
>> + device_type = "memory";
>> reg = <0x00000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
>> index 0a7136462a1a..290ebbeb210f 100644
>> --- a/arch/arm/boot/dts/tegra20.dtsi
>> +++ b/arch/arm/boot/dts/tegra20.dtsi
>> @@ -4,11 +4,14 @@
>> #include <dt-bindings/pinctrl/pinctrl-tegra.h>
>> #include <dt-bindings/interrupt-controller/arm-gic.h>
>>
>> -#include "skeleton.dtsi"
>> -
>> / {
>> compatible = "nvidia,tegra20";
>> interrupt-parent = <&lic>;
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> +
>> + chosen { };
>> + aliases { };
>>
>> iram@40000000 {
>> compatible = "mmio-sram";
>> diff --git a/arch/arm/boot/dts/tegra30-apalis.dtsi
>> b/arch/arm/boot/dts/tegra30-apalis.dtsi
>> index d1d21ec2a844..184f60c720fa 100644
>> --- a/arch/arm/boot/dts/tegra30-apalis.dtsi
>> +++ b/arch/arm/boot/dts/tegra30-apalis.dtsi
>> @@ -10,6 +10,11 @@
>> model = "Toradex Apalis T30";
>> compatible = "toradex,apalis_t30", "nvidia,tegra30";
>>
>> + memory@0 {
>> + device_type = "memory";
>> + reg = <0 0>;
>> + };
>> +
>> pcie@3000 {
>> avdd-pexa-supply = <&vdd2_reg>;
>> vdd-pexa-supply = <&vdd2_reg>;
>> diff --git a/arch/arm/boot/dts/tegra30-beaver.dts
>> b/arch/arm/boot/dts/tegra30-beaver.dts
>> index ae52a5039506..72369877d284 100644
>> --- a/arch/arm/boot/dts/tegra30-beaver.dts
>> +++ b/arch/arm/boot/dts/tegra30-beaver.dts
>> @@ -17,7 +17,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> reg = <0x80000000 0x7ff00000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi
>> b/arch/arm/boot/dts/tegra30-cardhu.dtsi
>> index 92a9740c533f..24c04d4c335d 100644
>> --- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
>> +++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
>> @@ -40,7 +40,8 @@
>> stdout-path = "serial0:115200n8";
>> };
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> reg = <0x80000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra30-colibri.dtsi
>> b/arch/arm/boot/dts/tegra30-colibri.dtsi
>> index c44d8c40c410..cc46cedf80b9 100644
>> --- a/arch/arm/boot/dts/tegra30-colibri.dtsi
>> +++ b/arch/arm/boot/dts/tegra30-colibri.dtsi
>> @@ -10,7 +10,8 @@
>> model = "Toradex Colibri T30";
>> compatible = "toradex,colibri_t30", "nvidia,tegra30";
>>
>> - memory {
>> + memory@80000000 {
>> + device_type = "memory";
>> reg = <0x80000000 0x40000000>;
>> };
>>
>> diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
>> index a110cf84d85f..4383f0fd789d 100644
>> --- a/arch/arm/boot/dts/tegra30.dtsi
>> +++ b/arch/arm/boot/dts/tegra30.dtsi
>> @@ -5,11 +5,14 @@
>> #include <dt-bindings/pinctrl/pinctrl-tegra.h>
>> #include <dt-bindings/interrupt-controller/arm-gic.h>
>>
>> -#include "skeleton.dtsi"
>> -
>> / {
>> compatible = "nvidia,tegra30";
>> interrupt-parent = <&lic>;
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> +
>> + chosen { };
>> + aliases { };
>
> Could we not add
>
> memory { device_type = "memory"; };
>
> in the SoC level device trees?
>
> This would save device_type in all other instances.
>
> That is also how it is done in other places, e.g.
> arch/arm/boot/dts/imx6qdl.dtsi

Not really because the unit address will not match between different
boards. The imx6qdl, as I see, has the same issue:
- imx6qdl.dtsi defines "memory" node
- imx6dl-apf6dev.dts includes the previous and defines "memory@10000000"

This is wrong - two memory nodes.

> Also, could we maybe split this in two?
>
> ARM: dts: tegra: Remove skeleton.dtsi
> ARM: dts: tegra: fix DTC warnings for /memory

It is possible to split it but this really won't bring any benefit
because the removal of skeleton.dtsi is the way to fix the errors. Or
saying it differently - the warnings are the reason to remove the
skeleton.dtsi. If you split them, what is the reason to remove the
skeleton.dtsi? (Theoretically it was deprecated so this could be
explanation).

If you wish, I can prepare something like:
1. Remove skeleton.dtsi and add everywhere 'device_type = "memory"'.
All the warnings will stay but the end DTB should be equal between
changes.
2. Fix warnings.

> The first would only touch SoC level dts.

No, because device_type has to be added everywhere. And because of
warnings (explained before) it cannot be added to SoC DTSI.

Best regards,
Krzysztof

>
> The second then would fix DTC warnings by adding the address to the
> memory nodes in all board files.
>
> --
> Stefan
>
>>
>> pcie@3000 {
>> compatible = "nvidia,tegra30-pcie";

Next message: Dave Young: "Re: [PATCH] kdump: add default crashkernel reserve kernel config options"
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In reply to: Stefan Agner: "Re: [PATCH v5 1/3] ARM: dts: tegra: Remove skeleton.dtsi and fix DTC warnings for /memory"
Next in thread: Stefan Agner: "Re: [PATCH v5 1/3] ARM: dts: tegra: Remove skeleton.dtsi and fix DTC warnings for /memory"
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