diff mbox series

[v14,6/8] arm64: dts: Add AMD Pensando Elba SoC support

Message ID 20230515181606.65953-7-blarson@amd.com
State Superseded
Headers show
Series Support AMD Pensando Elba SoC | expand

Commit Message

Brad Larson May 15, 2023, 6:16 p.m. UTC
Add AMD Pensando common and Elba SoC specific device nodes

Signed-off-by: Brad Larson <blarson@amd.com>
---

v14 changes:
- Fix dtbs_check l2-cache* property issue by adding required
  cache-level and cache-unified properties
- Observed the issue after updating dtschema from 2023.1 to 2023.4
  and yamllint from 1.26.3 to 1.30.0

v11 changes:
- Delete reset-names
- Fix spi0 compatible to be specific 'amd,pensando-elba-ctrl'

v9 changes:
- Single node for spi0 system-controller and squash
  the reset-controller child into parent

---
 arch/arm64/boot/dts/amd/Makefile              |   1 +
 arch/arm64/boot/dts/amd/elba-16core.dtsi      | 197 ++++++++++++++++++
 arch/arm64/boot/dts/amd/elba-asic-common.dtsi |  80 +++++++
 arch/arm64/boot/dts/amd/elba-asic.dts         |  28 +++
 arch/arm64/boot/dts/amd/elba-flash-parts.dtsi | 106 ++++++++++
 arch/arm64/boot/dts/amd/elba.dtsi             | 191 +++++++++++++++++
 6 files changed, 603 insertions(+)
 create mode 100644 arch/arm64/boot/dts/amd/elba-16core.dtsi
 create mode 100644 arch/arm64/boot/dts/amd/elba-asic-common.dtsi
 create mode 100644 arch/arm64/boot/dts/amd/elba-asic.dts
 create mode 100644 arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
 create mode 100644 arch/arm64/boot/dts/amd/elba.dtsi

Comments

Krzysztof Kozlowski May 16, 2023, 7:17 a.m. UTC | #1
On 15/05/2023 20:16, Brad Larson wrote:
> Add AMD Pensando common and Elba SoC specific device nodes
> 
> Signed-off-by: Brad Larson <blarson@amd.com>
> ---
> 

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof
Michal Simek May 16, 2023, 7:54 a.m. UTC | #2
On 5/15/23 20:16, Brad Larson wrote:
> Add AMD Pensando common and Elba SoC specific device nodes
> 
> Signed-off-by: Brad Larson <blarson@amd.com>
> ---
> 
> v14 changes:
> - Fix dtbs_check l2-cache* property issue by adding required
>    cache-level and cache-unified properties
> - Observed the issue after updating dtschema from 2023.1 to 2023.4
>    and yamllint from 1.26.3 to 1.30.0
> 
> v11 changes:
> - Delete reset-names
> - Fix spi0 compatible to be specific 'amd,pensando-elba-ctrl'
> 
> v9 changes:
> - Single node for spi0 system-controller and squash
>    the reset-controller child into parent
> 
> ---
>   arch/arm64/boot/dts/amd/Makefile              |   1 +
>   arch/arm64/boot/dts/amd/elba-16core.dtsi      | 197 ++++++++++++++++++
>   arch/arm64/boot/dts/amd/elba-asic-common.dtsi |  80 +++++++
>   arch/arm64/boot/dts/amd/elba-asic.dts         |  28 +++
>   arch/arm64/boot/dts/amd/elba-flash-parts.dtsi | 106 ++++++++++
>   arch/arm64/boot/dts/amd/elba.dtsi             | 191 +++++++++++++++++
>   6 files changed, 603 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/amd/elba-16core.dtsi
>   create mode 100644 arch/arm64/boot/dts/amd/elba-asic-common.dtsi
>   create mode 100644 arch/arm64/boot/dts/amd/elba-asic.dts
>   create mode 100644 arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
>   create mode 100644 arch/arm64/boot/dts/amd/elba.dtsi
> 
> diff --git a/arch/arm64/boot/dts/amd/Makefile b/arch/arm64/boot/dts/amd/Makefile
> index 68103a8b0ef5..8502cc2afbc5 100644
> --- a/arch/arm64/boot/dts/amd/Makefile
> +++ b/arch/arm64/boot/dts/amd/Makefile
> @@ -1,2 +1,3 @@
>   # SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_PENSANDO) += elba-asic.dtb
>   dtb-$(CONFIG_ARCH_SEATTLE) += amd-overdrive-rev-b0.dtb amd-overdrive-rev-b1.dtb
> diff --git a/arch/arm64/boot/dts/amd/elba-16core.dtsi b/arch/arm64/boot/dts/amd/elba-16core.dtsi
> new file mode 100644
> index 000000000000..f9f9f5fd5f69
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amd/elba-16core.dtsi
> @@ -0,0 +1,197 @@
> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +/*
> + * Copyright 2020-2022 Advanced Micro Devices, Inc.

2023 and the same below.

> + */
> +
> +/ {
> +	cpus {
> +		#address-cells = <2>;
> +		#size-cells = <0>;
> +
> +		cpu-map {
> +			cluster0 {
> +				core0 { cpu = <&cpu0>; };
> +				core1 { cpu = <&cpu1>; };
> +				core2 { cpu = <&cpu2>; };
> +				core3 { cpu = <&cpu3>; };
> +			};
> +
> +			cluster1 {
> +				core0 { cpu = <&cpu4>; };
> +				core1 { cpu = <&cpu5>; };
> +				core2 { cpu = <&cpu6>; };
> +				core3 { cpu = <&cpu7>; };
> +			};
> +
> +			cluster2 {
> +				core0 { cpu = <&cpu8>; };
> +				core1 { cpu = <&cpu9>; };
> +				core2 { cpu = <&cpu10>; };
> +				core3 { cpu = <&cpu11>; };
> +			};
> +
> +			cluster3 {
> +				core0 { cpu = <&cpu12>; };
> +				core1 { cpu = <&cpu13>; };
> +				core2 { cpu = <&cpu14>; };
> +				core3 { cpu = <&cpu15>; };
> +			};
> +		};
> +
> +		/* CLUSTER 0 */
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x0>;

Do you really need 2/0 split here. The first cell is 0 anyway.


> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x1>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu2: cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x2>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu3: cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x3>;
> +			next-level-cache = <&l2_0>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_0: l2-cache0 {
> +			compatible = "cache";
> +			cache-unified;
> +			cache-level = <2>;
> +		};
> +
> +		/* CLUSTER 1 */
> +		cpu4: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x100>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu5: cpu@101 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x101>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu6: cpu@102 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x102>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu7: cpu@103 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x103>;
> +			next-level-cache = <&l2_1>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_1: l2-cache1 {
> +			compatible = "cache";
> +			cache-unified;
> +			cache-level = <2>;
> +		};
> +
> +		/* CLUSTER 2 */
> +		cpu8: cpu@200 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x200>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu9: cpu@201 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x201>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu10: cpu@202 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x202>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu11: cpu@203 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x203>;
> +			next-level-cache = <&l2_2>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_2: l2-cache2 {
> +			compatible = "cache";
> +			cache-unified;
> +			cache-level = <2>;
> +		};
> +
> +		/* CLUSTER 3 */
> +		cpu12: cpu@300 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x300>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu13: cpu@301 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x301>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu14: cpu@302 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x302>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu15: cpu@303 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0 0x303>;
> +			next-level-cache = <&l2_3>;
> +			enable-method = "psci";
> +		};
> +
> +		l2_3: l2-cache3 {
> +			compatible = "cache";
> +			cache-unified;
> +			cache-level = <2>;
> +		};
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/amd/elba-asic-common.dtsi b/arch/arm64/boot/dts/amd/elba-asic-common.dtsi
> new file mode 100644
> index 000000000000..1a615788f54e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amd/elba-asic-common.dtsi
> @@ -0,0 +1,80 @@
> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +/*
> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
> + */
> +
> +&ahb_clk {
> +	clock-frequency = <400000000>;
> +};
> +
> +&emmc_clk {
> +	clock-frequency = <200000000>;
> +};
> +
> +&flash_clk {
> +	clock-frequency = <400000000>;
> +};
> +
> +&ref_clk {
> +	clock-frequency = <156250000>;
> +};
> +
> +&qspi {
> +	status = "okay";
> +
> +	flash0: flash@0 {
> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <40000000>;
> +		spi-rx-bus-width = <2>;
> +		m25p,fast-read;
> +		cdns,read-delay = <0>;
> +		cdns,tshsl-ns = <0>;
> +		cdns,tsd2d-ns = <0>;
> +		cdns,tchsh-ns = <0>;
> +		cdns,tslch-ns = <0>;
> +	};
> +};
> +
> +&gpio0 {
> +	status = "okay";
> +};
> +
> +&emmc {
> +	bus-width = <8>;
> +	cap-mmc-hw-reset;
> +	resets = <&rstc 0>;
> +	status = "okay";
> +};
> +
> +&wdt0 {
> +	status = "okay";
> +};
> +
> +&i2c0 {
> +	clock-frequency = <100000>;
> +	status = "okay";
> +
> +	rtc@51 {
> +		compatible = "nxp,pcf85263";
> +		reg = <0x51>;
> +	};
> +};
> +
> +&spi0 {
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	num-cs = <4>;
> +	cs-gpios = <0>, <0>, <&porta 1 GPIO_ACTIVE_LOW>,
> +		   <&porta 7 GPIO_ACTIVE_LOW>;
> +	status = "okay";
> +
> +	rstc: system-controller@0 {
> +		compatible = "amd,pensando-elba-ctrl";
> +		reg = <0>;
> +		spi-max-frequency = <12000000>;
> +		interrupt-parent = <&porta>;
> +		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +		#reset-cells = <1>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/amd/elba-asic.dts b/arch/arm64/boot/dts/amd/elba-asic.dts
> new file mode 100644
> index 000000000000..c3f4da2f7449
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amd/elba-asic.dts
> @@ -0,0 +1,28 @@
> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +/*
> + * Device Tree file for AMD Pensando Elba Board.
> + *
> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
> + */
> +
> +/dts-v1/;
> +
> +#include "elba.dtsi"
> +#include "elba-16core.dtsi"
> +#include "elba-asic-common.dtsi"
> +#include "elba-flash-parts.dtsi"
> +
> +/ {
> +	model = "AMD Pensando Elba Board";
> +	compatible = "amd,pensando-elba-ortano", "amd,pensando-elba";
> +
> +	aliases {
> +		serial0 = &uart0;
> +		spi0 = &spi0;
> +		spi1 = &qspi;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
> new file mode 100644
> index 000000000000..734893fef2c3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
> @@ -0,0 +1,106 @@
> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +/*
> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
> + */
> +
> +&flash0 {
> +	partitions {
> +		compatible = "fixed-partitions";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		partition@0 {
> +			label = "flash";
> +			reg = <0x10000 0xfff0000>;

This doesn't fit with partition@0 above.
Also size is weird.


> +		};
> +
> +		partition@f0000 {
> +			label = "golduenv";
> +			reg = <0xf0000 0x10000>;
> +		};
> +
> +		partition@100000 {
> +			label = "boot0";
> +			reg = <0x100000 0x80000>;
> +		};
> +
> +		partition@180000 {
> +			label = "golduboot";
> +			reg = <0x180000 0x200000>;
> +		};
> +
> +		partition@380000 {
> +			label = "brdcfg0";
> +			reg = <0x380000 0x10000>;
> +		};
> +
> +		partition@390000 {
> +			label = "brdcfg1";
> +			reg = <0x390000 0x10000>;
> +		};
> +
> +		partition@400000 {
> +			label = "goldfw";
> +			reg = <0x400000 0x3c00000>;

This size looks weird.

> +		};
> +
> +		partition@4010000 {
> +			label = "fwmap";
> +			reg = <0x4010000 0x20000>;
> +		};
> +
> +		partition@4030000 {
> +			label = "fwsel";
> +			reg = <0x4030000 0x20000>;
> +		};
> +
> +		partition@4090000 {
> +			label = "bootlog";
> +			reg = <0x4090000 0x20000>;
> +		};
> +
> +		partition@40b0000 {
> +			label = "panicbuf";
> +			reg = <0x40b0000 0x20000>;
> +		};
> +
> +		partition@40d0000 {
> +			label = "uservars";
> +			reg = <0x40d0000 0x20000>;
> +		};
> +
> +		partition@4200000 {
> +			label = "uboota";
> +			reg = <0x4200000 0x400000>;
> +		};
> +
> +		partition@4600000 {
> +			label = "ubootb";
> +			reg = <0x4600000 0x400000>;
> +		};
> +
> +		partition@4a00000 {
> +			label = "mainfwa";
> +			reg = <0x4a00000 0x1000000>;
> +		};
> +
> +		partition@5a00000 {
> +			label = "mainfwb";
> +			reg = <0x5a00000 0x1000000>;
> +		};
> +
> +		partition@6a00000 {
> +			label = "diaguboot";
> +			reg = <0x6a00000 0x400000>;
> +		};
> +

here is gap

> +		partition@8000000 {
> +			label = "diagfw";
> +			reg = <0x8000000 0x7fe0000>;
> +		};
> +
> +		partition@ffe0000 {
> +			label = "ubootenv";
> +			reg = <0xffe0000 0x10000>;
> +		};

And this is missing space description.

Thanks,
Michal
Brad Larson May 23, 2023, 7:28 p.m. UTC | #3
Hi Michal,

Thanks for reviewing the patch.

On 5/16/23 09:54, Michal Simek wrote:
> On 5/15/23 20:16, Brad Larson wrote:
>> Add AMD Pensando common and Elba SoC specific device nodes
>> 
>> Signed-off-by: Brad Larson <blarson@amd.com>
>> ---
>> 
>> v14 changes:
>> - Fix dtbs_check l2-cache* property issue by adding required
>>    cache-level and cache-unified properties
>> - Observed the issue after updating dtschema from 2023.1 to 2023.4
>>    and yamllint from 1.26.3 to 1.30.0
>> 
>> v11 changes:
>> - Delete reset-names
>> - Fix spi0 compatible to be specific 'amd,pensando-elba-ctrl'
>> 
>> v9 changes:
>> - Single node for spi0 system-controller and squash
>>    the reset-controller child into parent
>> 
>> ---
>>   arch/arm64/boot/dts/amd/Makefile              |   1 +
>>   arch/arm64/boot/dts/amd/elba-16core.dtsi      | 197 ++++++++++++++++++
>>   arch/arm64/boot/dts/amd/elba-asic-common.dtsi |  80 +++++++
>>   arch/arm64/boot/dts/amd/elba-asic.dts         |  28 +++
>>   arch/arm64/boot/dts/amd/elba-flash-parts.dtsi | 106 ++++++++++
>>   arch/arm64/boot/dts/amd/elba.dtsi             | 191 +++++++++++++++++
>>   6 files changed, 603 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/amd/elba-16core.dtsi
>>   create mode 100644 arch/arm64/boot/dts/amd/elba-asic-common.dtsi
>>   create mode 100644 arch/arm64/boot/dts/amd/elba-asic.dts
>>   create mode 100644 arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
>>   create mode 100644 arch/arm64/boot/dts/amd/elba.dtsi
>> 
>> diff --git a/arch/arm64/boot/dts/amd/Makefile b/arch/arm64/boot/dts/amd/Makefile
>> index 68103a8b0ef5..8502cc2afbc5 100644
>> --- a/arch/arm64/boot/dts/amd/Makefile
>> +++ b/arch/arm64/boot/dts/amd/Makefile
>> @@ -1,2 +1,3 @@
>>   # SPDX-License-Identifier: GPL-2.0
>> +dtb-$(CONFIG_ARCH_PENSANDO) += elba-asic.dtb
>>   dtb-$(CONFIG_ARCH_SEATTLE) += amd-overdrive-rev-b0.dtb amd-overdrive-rev-b1.dtb
>> diff --git a/arch/arm64/boot/dts/amd/elba-16core.dtsi b/arch/arm64/boot/dts/amd/elba-16core.dtsi
>> new file mode 100644
>> index 000000000000..f9f9f5fd5f69
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/amd/elba-16core.dtsi
>> @@ -0,0 +1,197 @@
>> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> +/*
>> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
>
> 2023 and the same below.

I'll update the copyright in the next submit

>> + */
>> +
>> +/ {
>> +	cpus {
>> +		#address-cells = <2>;
>> +		#size-cells = <0>;
>> +
>> +		cpu-map {
>> +			cluster0 {
>> +				core0 { cpu = <&cpu0>; };
>> +				core1 { cpu = <&cpu1>; };
>> +				core2 { cpu = <&cpu2>; };
>> +				core3 { cpu = <&cpu3>; };
>> +			};
>> +
>> +			cluster1 {
>> +				core0 { cpu = <&cpu4>; };
>> +				core1 { cpu = <&cpu5>; };
>> +				core2 { cpu = <&cpu6>; };
>> +				core3 { cpu = <&cpu7>; };
>> +			};
>> +
>> +			cluster2 {
>> +				core0 { cpu = <&cpu8>; };
>> +				core1 { cpu = <&cpu9>; };
>> +				core2 { cpu = <&cpu10>; };
>> +				core3 { cpu = <&cpu11>; };
>> +			};
>> +
>> +			cluster3 {
>> +				core0 { cpu = <&cpu12>; };
>> +				core1 { cpu = <&cpu13>; };
>> +				core2 { cpu = <&cpu14>; };
>> +				core3 { cpu = <&cpu15>; };
>> +			};
>> +		};
>> +
>> +		/* CLUSTER 0 */
>> +		cpu0: cpu@0 {
>> +			device_type = "cpu";
>> +			compatible = "arm,cortex-a72";
>> +			reg = <0 0x0>;
>
> Do you really need 2/0 split here. The first cell is 0 anyway.

Yes following 64-bit system definition

...

>> diff --git a/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
>> new file mode 100644
>> index 000000000000..734893fef2c3
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
>> @@ -0,0 +1,106 @@
>> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> +/*
>> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
>> + */
>> +
>> +&flash0 {
0xf0000>> +	partitions {
>> +		compatible = "fixed-partitions";
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		partition@0 {
>> +			label = "flash";
>> +			reg = <0x10000 0xfff0000>;
>
> This doesn't fit with partition@0 above.
> Also size is weird.

This is intended to not expose sector 0.

>> +		};
>> +
>> +		partition@f0000 {
>> +			label = "golduenv";
>> +			reg = <0xf0000 0x10000>;
>> +		};
>> +
>> +		partition@100000 {
>> +			label = "boot0";
>> +			reg = <0x100000 0x80000>;
>> +		};
>> +
>> +		partition@180000 {
>> +			label = "golduboot";
>> +			reg = <0x180000 0x200000>;
>> +		};
>> +
>> +		partition@380000 {
>> +			label = "brdcfg0";
>> +			reg = <0x380000 0x10000>;
>> +		};
>> +
>> +		partition@390000 {
>> +			label = "brdcfg1";
>> +			reg = <0x390000 0x10000>;
>> +		};
>> +
>> +		partition@400000 {
>> +			label = "goldfw";
>> +			reg = <0x400000 0x3c00000>;
>
> This size looks weird.

It's the allocated size for this firmware component.

>> +		};
>> +
>> +		partition@4010000 {
>> +			label = "fwmap";
>> +			reg = <0x4010000 0x20000>;
>> +		};
>> +
>> +		partition@4030000 {
>> +			label = "fwsel";
>> +			reg = <0x4030000 0x20000>;
>> +		};
>> +
>> +		partition@4090000 {
>> +			label = "bootlog";
>> +			reg = <0x4090000 0x20000>;
>> +		};
>> +
>> +		partition@40b0000 {
>> +			label = "panicbuf";
>> +			reg = <0x40b0000 0x20000>;
>> +		};
>> +
>> +		partition@40d0000 {
>> +			label = "uservars";
>> +			reg = <0x40d0000 0x20000>;
>> +		};
>> +
>> +		partition@4200000 {
>> +			label = "uboota";
>> +			reg = <0x4200000 0x400000>;
>> +		};
>> +
>> +		partition@4600000 {
>> +			label = "ubootb";
>> +			reg = <0x4600000 0x400000>;
>> +		};
>> +
>> +		partition@4a00000 {
>> +			label = "mainfwa";
>> +			reg = <0x4a00000 0x1000000>;
>> +		};
>> +
>> +		partition@5a00000 {
>> +			label = "mainfwb";
>> +			reg = <0x5a00000 0x1000000>;
>> +		};
>> +
>> +		partition@6a00000 {
>> +			label = "diaguboot";
>> +			reg = <0x6a00000 0x400000>;
>> +		};
>> +
>
> here is gap

This is intentional for unallocated space.  I'll put in a 'spare' partition.

>> +		partition@8000000 {
>> +			label = "diagfw";
>> +			reg = <0x8000000 0x7fe0000>;
>> +		};
>> +
>> +		partition@ffe0000 {
>> +			label = "ubootenv";
>> +			reg = <0xffe0000 0x10000>;
>> +		};
>
> And this is missing space description.

space description?

Regards,
Brad
Geert Uytterhoeven May 24, 2023, 11:52 a.m. UTC | #4
Hi Brad,

On Tue, May 23, 2023 at 9:30 PM Brad Larson <blarson@amd.com> wrote:
> On 5/16/23 09:54, Michal Simek wrote:
> > On 5/15/23 20:16, Brad Larson wrote:
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/amd/elba-16core.dtsi
> >> @@ -0,0 +1,197 @@
> >> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> >> +/*
> >> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
> >
> > 2023 and the same below.
>
> I'll update the copyright in the next submit

Did you make any substantial changes in 2023?

> >> + */
> >> +
> >> +/ {
> >> +    cpus {
> >> +            #address-cells = <2>;
> >> +            #size-cells = <0>;
> >> +
> >> +            cpu-map {
> >> +                    cluster0 {
> >> +                            core0 { cpu = <&cpu0>; };
> >> +                            core1 { cpu = <&cpu1>; };
> >> +                            core2 { cpu = <&cpu2>; };
> >> +                            core3 { cpu = <&cpu3>; };
> >> +                    };
> >> +
> >> +                    cluster1 {
> >> +                            core0 { cpu = <&cpu4>; };
> >> +                            core1 { cpu = <&cpu5>; };
> >> +                            core2 { cpu = <&cpu6>; };
> >> +                            core3 { cpu = <&cpu7>; };
> >> +                    };
> >> +
> >> +                    cluster2 {
> >> +                            core0 { cpu = <&cpu8>; };
> >> +                            core1 { cpu = <&cpu9>; };
> >> +                            core2 { cpu = <&cpu10>; };
> >> +                            core3 { cpu = <&cpu11>; };
> >> +                    };
> >> +
> >> +                    cluster3 {
> >> +                            core0 { cpu = <&cpu12>; };
> >> +                            core1 { cpu = <&cpu13>; };
> >> +                            core2 { cpu = <&cpu14>; };
> >> +                            core3 { cpu = <&cpu15>; };
> >> +                    };
> >> +            };
> >> +
> >> +            /* CLUSTER 0 */
> >> +            cpu0: cpu@0 {
> >> +                    device_type = "cpu";
> >> +                    compatible = "arm,cortex-a72";
> >> +                    reg = <0 0x0>;
> >
> > Do you really need 2/0 split here. The first cell is 0 anyway.
>
> Yes following 64-bit system definition

You mean for the 64-bit main address space?
The CPU address space under /cpus is unrelated.

> >> +++ b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
> >> @@ -0,0 +1,106 @@
> >> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> >> +/*
> >> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
> >> + */
> >> +
> >> +&flash0 {
> 0xf0000>> +     partitions {
> >> +            compatible = "fixed-partitions";
> >> +            #address-cells = <1>;
> >> +            #size-cells = <1>;
> >> +            partition@0 {
> >> +                    label = "flash";
> >> +                    reg = <0x10000 0xfff0000>;
> >
> > This doesn't fit with partition@0 above.
> > Also size is weird.
>
> This is intended to not expose sector 0.

The unit address should still match the first reg entry
=> partition@10000.

Gr{oetje,eeting}s,

                        Geert
Brad Larson May 30, 2023, 10:03 p.m. UTC | #5
Hi Geert,

On Wed, May 24, 2023 at 13:52 Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Tue, May 23, 2023 at 9:30 PM Brad Larson <blarson@amd.com> wrote:
>> On 5/16/23 09:54, Michal Simek wrote:
>> > On 5/15/23 20:16, Brad Larson wrote:
>> >> --- /dev/null
>> >> +++ b/arch/arm64/boot/dts/amd/elba-16core.dtsi
>> >> @@ -0,0 +1,197 @@
>> >> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> >> +/*
>> >> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
>> >
>> > 2023 and the same below.
>>
>> I'll update the copyright in the next submit
>
> Did you make any substantial changes in 2023?

Yes, additional properties were added to l2-cache*

>> >> + */
>> >> +
>> >> +/ {
>> >> +    cpus {
>> >> +            #address-cells = <2>;
>> >> +            #size-cells = <0>;
>> >> +
>> >> +            cpu-map {
>> >> +                    cluster0 {
>> >> +                            core0 { cpu = <&cpu0>; };
>> >> +                            core1 { cpu = <&cpu1>; };
>> >> +                            core2 { cpu = <&cpu2>; };
>> >> +                            core3 { cpu = <&cpu3>; };
>> >> +                    };
>> >> +
>> >> +                    cluster1 {
>> >> +                            core0 { cpu = <&cpu4>; };
>> >> +                            core1 { cpu = <&cpu5>; };
>> >> +                            core2 { cpu = <&cpu6>; };
>> >> +                            core3 { cpu = <&cpu7>; };
>> >> +                    };
>> >> +
>> >> +                    cluster2 {
>> >> +                            core0 { cpu = <&cpu8>; };
>> >> +                            core1 { cpu = <&cpu9>; };
>> >> +                            core2 { cpu = <&cpu10>; };
>> >> +                            core3 { cpu = <&cpu11>; };
>> >> +                    };
>> >> +
>> >> +                    cluster3 {
>> >> +                            core0 { cpu = <&cpu12>; };
>> >> +                            core1 { cpu = <&cpu13>; };
>> >> +                            core2 { cpu = <&cpu14>; };
>> >> +                            core3 { cpu = <&cpu15>; };
>> >> +                    };
>> >> +            };
>> >> +
>> >> +            /* CLUSTER 0 */
>> >> +            cpu0: cpu@0 {
>> >> +                    device_type = "cpu";
>> >> +                    compatible = "arm,cortex-a72";
>> >> +                    reg = <0 0x0>;
>> >
>> > Do you really need 2/0 split here. The first cell is 0 anyway.
>>
>> Yes following 64-bit system definition
>
> You mean for the 64-bit main address space?
> The CPU address space under /cpus is unrelated.

Yes, the reg prop for this node is CPU/threads per dt spec.  Checked the history and
the Elba dt was derived from socionext for these nodes and this is how those device
trees are configured along with over a dozen other devices.  I changed to 
address-cells = <1> and dropped the leading zero from all cpu* reg<> and booting
the system I'm observing no change.  Looking in drivers/of I'm not seeing where
cpu*/reg is read and used, any recommendation?

>> >> +++ b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
>> >> @@ -0,0 +1,106 @@
>> >> +// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> >> +/*
>> >> + * Copyright 2020-2022 Advanced Micro Devices, Inc.
>> >> + */
>> >> +
>> >> +&flash0 {
>> 0xf0000>> +     partitions {
>> >> +            compatible = "fixed-partitions";
>> >> +            #address-cells = <1>;
>> >> +            #size-cells = <1>;
>> >> +            partition@0 {
>> >> +                    label = "flash";
>> >> +                    reg = <0x10000 0xfff0000>;
>> >
>> > This doesn't fit with partition@0 above.
>> > Also size is weird.
>>
>> This is intended to not expose sector 0.
>
> The unit address should still match the first reg entry
> => partition@10000.

Changed to this:

                partition@0 {
                        label = "rsvd";
                        reg = <0x0 0x10000>;
                        read-only;
                };

                partition@10000 {
                        label = "flash";
                        reg = <0x10000 0xfff0000>;
                };

Regards,
Brad
Geert Uytterhoeven May 31, 2023, 1:09 p.m. UTC | #6
Hi Brad,

On Wed, May 31, 2023 at 12:04 AM Brad Larson <blarson@amd.com> wrote:
> On Wed, May 24, 2023 at 13:52 Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Tue, May 23, 2023 at 9:30 PM Brad Larson <blarson@amd.com> wrote:
> >> On 5/16/23 09:54, Michal Simek wrote:
> >> > On 5/15/23 20:16, Brad Larson wrote:
> >> >> + */
> >> >> +
> >> >> +/ {
> >> >> +    cpus {
> >> >> +            #address-cells = <2>;
> >> >> +            #size-cells = <0>;
> >> >> +
> >> >> +            cpu-map {
> >> >> +                    cluster0 {
> >> >> +                            core0 { cpu = <&cpu0>; };
> >> >> +                            core1 { cpu = <&cpu1>; };
> >> >> +                            core2 { cpu = <&cpu2>; };
> >> >> +                            core3 { cpu = <&cpu3>; };
> >> >> +                    };
> >> >> +
> >> >> +                    cluster1 {
> >> >> +                            core0 { cpu = <&cpu4>; };
> >> >> +                            core1 { cpu = <&cpu5>; };
> >> >> +                            core2 { cpu = <&cpu6>; };
> >> >> +                            core3 { cpu = <&cpu7>; };
> >> >> +                    };
> >> >> +
> >> >> +                    cluster2 {
> >> >> +                            core0 { cpu = <&cpu8>; };
> >> >> +                            core1 { cpu = <&cpu9>; };
> >> >> +                            core2 { cpu = <&cpu10>; };
> >> >> +                            core3 { cpu = <&cpu11>; };
> >> >> +                    };
> >> >> +
> >> >> +                    cluster3 {
> >> >> +                            core0 { cpu = <&cpu12>; };
> >> >> +                            core1 { cpu = <&cpu13>; };
> >> >> +                            core2 { cpu = <&cpu14>; };
> >> >> +                            core3 { cpu = <&cpu15>; };
> >> >> +                    };
> >> >> +            };
> >> >> +
> >> >> +            /* CLUSTER 0 */
> >> >> +            cpu0: cpu@0 {
> >> >> +                    device_type = "cpu";
> >> >> +                    compatible = "arm,cortex-a72";
> >> >> +                    reg = <0 0x0>;
> >> >
> >> > Do you really need 2/0 split here. The first cell is 0 anyway.
> >>
> >> Yes following 64-bit system definition
> >
> > You mean for the 64-bit main address space?
> > The CPU address space under /cpus is unrelated.
>
> Yes, the reg prop for this node is CPU/threads per dt spec.  Checked the history and
> the Elba dt was derived from socionext for these nodes and this is how those device
> trees are configured along with over a dozen other devices.  I changed to
> address-cells = <1> and dropped the leading zero from all cpu* reg<> and booting
> the system I'm observing no change.  Looking in drivers/of I'm not seeing where
> cpu*/reg is read and used, any recommendation?

drivers/of/cpu.c

Looks like there are lots of DTS files that use #address-cells = <2> for
CPU nodes :-(

    git grep -w -A1 cpus -- "*dts*" | grep address-cells | grep "<2>"

I would use <1> is the first cell is always zero...

Gr{oetje,eeting}s,

                        Geert
Brad Larson June 5, 2023, 11:52 p.m. UTC | #7
Hi Geert,

On Wed, May 31, 2023 at 15:09 Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Wed, May 31, 2023 at 12:04 AM Brad Larson <blarson@amd.com> wrote:
>> On Wed, May 24, 2023 at 13:52 Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>> > On Tue, May 23, 2023 at 9:30 PM Brad Larson <blarson@amd.com> wrote:
>> >> On 5/16/23 09:54, Michal Simek wrote:
>> >> > On 5/15/23 20:16, Brad Larson wrote:
...
>> >> >> +            /* CLUSTER 0 */
>> >> >> +            cpu0: cpu@0 {
>> >> >> +                    device_type = "cpu";
>> >> >> +                    compatible = "arm,cortex-a72";
>> >> >> +                    reg = <0 0x0>;
>> >> >
>> >> > Do you really need 2/0 split here. The first cell is 0 anyway.
>> >>
>> >> Yes following 64-bit system definition
>> >
>> > You mean for the 64-bit main address space?
>> > The CPU address space under /cpus is unrelated.
>>
>> Yes, the reg prop for this node is CPU/threads per dt spec.  Checked the history and
>> the Elba dt was derived from socionext for these nodes and this is how those device
>> trees are configured along with over a dozen other devices.  I changed to
>> address-cells = <1> and dropped the leading zero from all cpu* reg<> and booting
>> the system I'm observing no change.  Looking in drivers/of I'm not seeing where
>> cpu*/reg is read and used, any recommendation?
>
> drivers/of/cpu.c
>
> Looks like there are lots of DTS files that use #address-cells = <2> for
> CPU nodes :-(
>
>     git grep -w -A1 cpus -- "*dts*" | grep address-cells | grep "<2>"
>
> I would use <1> is the first cell is always zero...

I'll do that.  Tha variation across DTS is likely coming from ~5.10 devicetree/bindings/arm/cpus.txt

        - #address-cells
...
                        # On ARM v8 64-bit systems value should be set to 2,
                          that corresponds to the MPIDR_EL1 register size.
                          If MPIDR_EL1[63:32] value is equal to 0 on all CPUs
                          in the system, #address-cells can be set to 1, since
                          MPIDR_EL1[63:32] bits are not used for CPUs
                          identification.

where the size of MPIDR_EL1 register is 2 for Elba cores.  However the shorthand is
allowed if MPIDR_EL1[63:32] bita are not used.

Latest version:

      On ARM v8 64-bit systems this property is required
        and matches the MPIDR_EL1 register affinity bits.

        * If cpus node's #address-cells property is set to 2

          The first reg cell bits [7:0] must be set to
          bits [39:32] of MPIDR_EL1.

          The second reg cell bits [23:0] must be set to
          bits [23:0] of MPIDR_EL1.

        * If cpus node's #address-cells property is set to 1

          The reg cell bits [23:0] must be set to bits [23:0]
          of MPIDR_EL1.

      All other bits in the reg cells must be set to 0.

Regards,
Brad
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/amd/Makefile b/arch/arm64/boot/dts/amd/Makefile
index 68103a8b0ef5..8502cc2afbc5 100644
--- a/arch/arm64/boot/dts/amd/Makefile
+++ b/arch/arm64/boot/dts/amd/Makefile
@@ -1,2 +1,3 @@ 
 # SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_PENSANDO) += elba-asic.dtb
 dtb-$(CONFIG_ARCH_SEATTLE) += amd-overdrive-rev-b0.dtb amd-overdrive-rev-b1.dtb
diff --git a/arch/arm64/boot/dts/amd/elba-16core.dtsi b/arch/arm64/boot/dts/amd/elba-16core.dtsi
new file mode 100644
index 000000000000..f9f9f5fd5f69
--- /dev/null
+++ b/arch/arm64/boot/dts/amd/elba-16core.dtsi
@@ -0,0 +1,197 @@ 
+// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+/*
+ * Copyright 2020-2022 Advanced Micro Devices, Inc.
+ */
+
+/ {
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		cpu-map {
+			cluster0 {
+				core0 { cpu = <&cpu0>; };
+				core1 { cpu = <&cpu1>; };
+				core2 { cpu = <&cpu2>; };
+				core3 { cpu = <&cpu3>; };
+			};
+
+			cluster1 {
+				core0 { cpu = <&cpu4>; };
+				core1 { cpu = <&cpu5>; };
+				core2 { cpu = <&cpu6>; };
+				core3 { cpu = <&cpu7>; };
+			};
+
+			cluster2 {
+				core0 { cpu = <&cpu8>; };
+				core1 { cpu = <&cpu9>; };
+				core2 { cpu = <&cpu10>; };
+				core3 { cpu = <&cpu11>; };
+			};
+
+			cluster3 {
+				core0 { cpu = <&cpu12>; };
+				core1 { cpu = <&cpu13>; };
+				core2 { cpu = <&cpu14>; };
+				core3 { cpu = <&cpu15>; };
+			};
+		};
+
+		/* CLUSTER 0 */
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x0>;
+			next-level-cache = <&l2_0>;
+			enable-method = "psci";
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x1>;
+			next-level-cache = <&l2_0>;
+			enable-method = "psci";
+		};
+
+		cpu2: cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x2>;
+			next-level-cache = <&l2_0>;
+			enable-method = "psci";
+		};
+
+		cpu3: cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x3>;
+			next-level-cache = <&l2_0>;
+			enable-method = "psci";
+		};
+
+		l2_0: l2-cache0 {
+			compatible = "cache";
+			cache-unified;
+			cache-level = <2>;
+		};
+
+		/* CLUSTER 1 */
+		cpu4: cpu@100 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x100>;
+			next-level-cache = <&l2_1>;
+			enable-method = "psci";
+		};
+
+		cpu5: cpu@101 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x101>;
+			next-level-cache = <&l2_1>;
+			enable-method = "psci";
+		};
+
+		cpu6: cpu@102 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x102>;
+			next-level-cache = <&l2_1>;
+			enable-method = "psci";
+		};
+
+		cpu7: cpu@103 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x103>;
+			next-level-cache = <&l2_1>;
+			enable-method = "psci";
+		};
+
+		l2_1: l2-cache1 {
+			compatible = "cache";
+			cache-unified;
+			cache-level = <2>;
+		};
+
+		/* CLUSTER 2 */
+		cpu8: cpu@200 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x200>;
+			next-level-cache = <&l2_2>;
+			enable-method = "psci";
+		};
+
+		cpu9: cpu@201 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x201>;
+			next-level-cache = <&l2_2>;
+			enable-method = "psci";
+		};
+
+		cpu10: cpu@202 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x202>;
+			next-level-cache = <&l2_2>;
+			enable-method = "psci";
+		};
+
+		cpu11: cpu@203 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x203>;
+			next-level-cache = <&l2_2>;
+			enable-method = "psci";
+		};
+
+		l2_2: l2-cache2 {
+			compatible = "cache";
+			cache-unified;
+			cache-level = <2>;
+		};
+
+		/* CLUSTER 3 */
+		cpu12: cpu@300 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x300>;
+			next-level-cache = <&l2_3>;
+			enable-method = "psci";
+		};
+
+		cpu13: cpu@301 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x301>;
+			next-level-cache = <&l2_3>;
+			enable-method = "psci";
+		};
+
+		cpu14: cpu@302 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x302>;
+			next-level-cache = <&l2_3>;
+			enable-method = "psci";
+		};
+
+		cpu15: cpu@303 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a72";
+			reg = <0 0x303>;
+			next-level-cache = <&l2_3>;
+			enable-method = "psci";
+		};
+
+		l2_3: l2-cache3 {
+			compatible = "cache";
+			cache-unified;
+			cache-level = <2>;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/amd/elba-asic-common.dtsi b/arch/arm64/boot/dts/amd/elba-asic-common.dtsi
new file mode 100644
index 000000000000..1a615788f54e
--- /dev/null
+++ b/arch/arm64/boot/dts/amd/elba-asic-common.dtsi
@@ -0,0 +1,80 @@ 
+// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+/*
+ * Copyright 2020-2022 Advanced Micro Devices, Inc.
+ */
+
+&ahb_clk {
+	clock-frequency = <400000000>;
+};
+
+&emmc_clk {
+	clock-frequency = <200000000>;
+};
+
+&flash_clk {
+	clock-frequency = <400000000>;
+};
+
+&ref_clk {
+	clock-frequency = <156250000>;
+};
+
+&qspi {
+	status = "okay";
+
+	flash0: flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+		spi-rx-bus-width = <2>;
+		m25p,fast-read;
+		cdns,read-delay = <0>;
+		cdns,tshsl-ns = <0>;
+		cdns,tsd2d-ns = <0>;
+		cdns,tchsh-ns = <0>;
+		cdns,tslch-ns = <0>;
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&emmc {
+	bus-width = <8>;
+	cap-mmc-hw-reset;
+	resets = <&rstc 0>;
+	status = "okay";
+};
+
+&wdt0 {
+	status = "okay";
+};
+
+&i2c0 {
+	clock-frequency = <100000>;
+	status = "okay";
+
+	rtc@51 {
+		compatible = "nxp,pcf85263";
+		reg = <0x51>;
+	};
+};
+
+&spi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	num-cs = <4>;
+	cs-gpios = <0>, <0>, <&porta 1 GPIO_ACTIVE_LOW>,
+		   <&porta 7 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	rstc: system-controller@0 {
+		compatible = "amd,pensando-elba-ctrl";
+		reg = <0>;
+		spi-max-frequency = <12000000>;
+		interrupt-parent = <&porta>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+		#reset-cells = <1>;
+	};
+};
diff --git a/arch/arm64/boot/dts/amd/elba-asic.dts b/arch/arm64/boot/dts/amd/elba-asic.dts
new file mode 100644
index 000000000000..c3f4da2f7449
--- /dev/null
+++ b/arch/arm64/boot/dts/amd/elba-asic.dts
@@ -0,0 +1,28 @@ 
+// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+/*
+ * Device Tree file for AMD Pensando Elba Board.
+ *
+ * Copyright 2020-2022 Advanced Micro Devices, Inc.
+ */
+
+/dts-v1/;
+
+#include "elba.dtsi"
+#include "elba-16core.dtsi"
+#include "elba-asic-common.dtsi"
+#include "elba-flash-parts.dtsi"
+
+/ {
+	model = "AMD Pensando Elba Board";
+	compatible = "amd,pensando-elba-ortano", "amd,pensando-elba";
+
+	aliases {
+		serial0 = &uart0;
+		spi0 = &spi0;
+		spi1 = &qspi;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
diff --git a/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
new file mode 100644
index 000000000000..734893fef2c3
--- /dev/null
+++ b/arch/arm64/boot/dts/amd/elba-flash-parts.dtsi
@@ -0,0 +1,106 @@ 
+// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+/*
+ * Copyright 2020-2022 Advanced Micro Devices, Inc.
+ */
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		partition@0 {
+			label = "flash";
+			reg = <0x10000 0xfff0000>;
+		};
+
+		partition@f0000 {
+			label = "golduenv";
+			reg = <0xf0000 0x10000>;
+		};
+
+		partition@100000 {
+			label = "boot0";
+			reg = <0x100000 0x80000>;
+		};
+
+		partition@180000 {
+			label = "golduboot";
+			reg = <0x180000 0x200000>;
+		};
+
+		partition@380000 {
+			label = "brdcfg0";
+			reg = <0x380000 0x10000>;
+		};
+
+		partition@390000 {
+			label = "brdcfg1";
+			reg = <0x390000 0x10000>;
+		};
+
+		partition@400000 {
+			label = "goldfw";
+			reg = <0x400000 0x3c00000>;
+		};
+
+		partition@4010000 {
+			label = "fwmap";
+			reg = <0x4010000 0x20000>;
+		};
+
+		partition@4030000 {
+			label = "fwsel";
+			reg = <0x4030000 0x20000>;
+		};
+
+		partition@4090000 {
+			label = "bootlog";
+			reg = <0x4090000 0x20000>;
+		};
+
+		partition@40b0000 {
+			label = "panicbuf";
+			reg = <0x40b0000 0x20000>;
+		};
+
+		partition@40d0000 {
+			label = "uservars";
+			reg = <0x40d0000 0x20000>;
+		};
+
+		partition@4200000 {
+			label = "uboota";
+			reg = <0x4200000 0x400000>;
+		};
+
+		partition@4600000 {
+			label = "ubootb";
+			reg = <0x4600000 0x400000>;
+		};
+
+		partition@4a00000 {
+			label = "mainfwa";
+			reg = <0x4a00000 0x1000000>;
+		};
+
+		partition@5a00000 {
+			label = "mainfwb";
+			reg = <0x5a00000 0x1000000>;
+		};
+
+		partition@6a00000 {
+			label = "diaguboot";
+			reg = <0x6a00000 0x400000>;
+		};
+
+		partition@8000000 {
+			label = "diagfw";
+			reg = <0x8000000 0x7fe0000>;
+		};
+
+		partition@ffe0000 {
+			label = "ubootenv";
+			reg = <0xffe0000 0x10000>;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/amd/elba.dtsi b/arch/arm64/boot/dts/amd/elba.dtsi
new file mode 100644
index 000000000000..674890cf2a34
--- /dev/null
+++ b/arch/arm64/boot/dts/amd/elba.dtsi
@@ -0,0 +1,191 @@ 
+// SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+/*
+ * Copyright 2020-2022 Advanced Micro Devices, Inc.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include "dt-bindings/interrupt-controller/arm-gic.h"
+
+/ {
+	model = "Elba ASIC Board";
+	compatible = "amd,pensando-elba";
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	dma-coherent;
+
+	ahb_clk: oscillator0 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	emmc_clk: oscillator2 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	flash_clk: oscillator3 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	ref_clk: oscillator4 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+	};
+
+	pmu {
+		compatible = "arm,cortex-a72-pmu";
+		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
+	};
+
+	soc: soc {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		i2c0: i2c@400 {
+			compatible = "snps,designware-i2c";
+			reg = <0x0 0x400 0x0 0x100>;
+			clocks = <&ahb_clk>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			i2c-sda-hold-time-ns = <480>;
+			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+
+		wdt0: watchdog@1400 {
+			compatible = "snps,dw-wdt";
+			reg = <0x0 0x1400 0x0 0x100>;
+			clocks = <&ahb_clk>;
+			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+
+		qspi: spi@2400 {
+			compatible = "amd,pensando-elba-qspi", "cdns,qspi-nor";
+			reg = <0x0 0x2400 0x0 0x400>,
+			      <0x0 0x7fff0000 0x0 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&flash_clk>;
+			cdns,fifo-depth = <1024>;
+			cdns,fifo-width = <4>;
+			cdns,trigger-address = <0x7fff0000>;
+			status = "disabled";
+		};
+
+		spi0: spi@2800 {
+			compatible = "amd,pensando-elba-spi";
+			reg = <0x0 0x2800 0x0 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			amd,pensando-elba-syscon = <&syscon>;
+			clocks = <&ahb_clk>;
+			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			num-cs = <2>;
+			status = "disabled";
+		};
+
+		gpio0: gpio@4000 {
+			compatible = "snps,dw-apb-gpio";
+			reg = <0x0 0x4000 0x0 0x78>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			porta: gpio-port@0 {
+				compatible = "snps,dw-apb-gpio-port";
+				reg = <0>;
+				gpio-controller;
+				#gpio-cells = <2>;
+				ngpios = <8>;
+				interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-controller;
+				interrupt-parent = <&gic>;
+				#interrupt-cells = <2>;
+			};
+
+			portb: gpio-port@1 {
+				compatible = "snps,dw-apb-gpio-port";
+				reg = <1>;
+				gpio-controller;
+				#gpio-cells = <2>;
+				ngpios = <8>;
+			};
+		};
+
+		uart0: serial@4800 {
+			compatible = "ns16550a";
+			reg = <0x0 0x4800 0x0 0x100>;
+			clocks = <&ref_clk>;
+			interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+		};
+
+		gic: interrupt-controller@800000 {
+			compatible = "arm,gic-v3";
+			reg = <0x0 0x800000 0x0 0x200000>,	/* GICD */
+			      <0x0 0xa00000 0x0 0x200000>,	/* GICR */
+			      <0x0 0x60000000 0x0 0x2000>,	/* GICC */
+			      <0x0 0x60010000 0x0 0x1000>,	/* GICH */
+			      <0x0 0x60020000 0x0 0x2000>;	/* GICV */
+			#address-cells = <2>;
+			#size-cells = <2>;
+			#interrupt-cells = <3>;
+			ranges;
+			interrupt-controller;
+			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
+
+			/*
+			 * Elba specific pre-ITS is enabled using the
+			 * existing property socionext,synquacer-pre-its
+			 */
+			gic_its: msi-controller@820000 {
+				compatible = "arm,gic-v3-its";
+				reg = <0x0 0x820000 0x0 0x10000>;
+				msi-controller;
+				#msi-cells = <1>;
+				socionext,synquacer-pre-its =
+							<0xc00000 0x1000000>;
+			};
+		};
+
+		emmc: mmc@30440000 {
+			compatible = "amd,pensando-elba-sd4hc", "cdns,sd4hc";
+			reg = <0x0 0x30440000 0x0 0x10000>,
+			      <0x0 0x30480044 0x0 0x4>;	/* byte-lane ctrl */
+			clocks = <&emmc_clk>;
+			interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+			cdns,phy-input-delay-sd-highspeed = <0x4>;
+			cdns,phy-input-delay-legacy = <0x4>;
+			cdns,phy-input-delay-sd-uhs-sdr50 = <0x6>;
+			cdns,phy-input-delay-sd-uhs-ddr50 = <0x16>;
+			mmc-ddr-1_8v;
+			status = "disabled";
+		};
+
+		syscon: syscon@307c0000 {
+			compatible = "amd,pensando-elba-syscon", "syscon";
+			reg = <0x0 0x307c0000 0x0 0x3000>;
+		};
+	};
+};