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Date: Thu, 23 Jul 2020 15:39:24 -0500
From: Suman Anna <s-anna@...com>
To: Lokesh Vutla <lokeshvutla@...com>, Tero Kristo <t-kristo@...com>,
Nishanth Menon <nm@...com>, Rob Herring <robh+dt@...nel.org>
CC: <linux-kernel@...r.kernel.org>,
Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
Sekhar Nori <nsekhar@...com>,
Kishon Vijay Abraham I <kishon@...com>,
Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: [PATCH 4/4] arm64: dts: ti: Add support for J7200 Common
Processor Board
On 7/23/20 3:46 AM, Lokesh Vutla wrote:
> Add support for J7200 Common Processor Board.
> The EVM architecture is very similar to J721E as follows:
>
> +------------------------------------------------------+
> | +-------------------------------------------+ |
> | | | |
> | | Add-on Card 1 Options | |
> | | | |
> | +-------------------------------------------+ |
> | |
> | |
> | +-------------------+ |
> | | | |
> | | SOM | |
> | +--------------+ | | |
> | | | | | |
> | | Add-on | +-------------------+ |
> | | Card 2 | | Power Supply
> | | Options | | |
> | | | | |
> | +--------------+ | <---
> +------------------------------------------------------+
> Common Processor Board
>
> Common Processor board is the baseboard that has most of the actual
> connectors, power supply etc. A SOM (System on Module) is plugged on
> to the common processor board and this contains the SoC, PMIC, DDR and
> basic high speed components necessary for functionality.
>
> Note:
> * The minimum configuration required to boot up the board is System On
> Module(SOM) + Common Processor Board.
> * Since there is just a single SOM and Common Processor Board, we are
> maintaining common processor board as the base dts and SOM as the dtsi
> that we include. In the future as more SOM's appear, we should move
> common processor board as a dtsi and include configurations as dts.
> * All daughter cards beyond the basic boards shall be maintained as
> overlays.
> * Since J7200 is derivative of J721E re-using the CONFIG_ARCH_K3_J721E_SOC
> config for building J7200 dts files.
>
> Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
Reviewed-by: Suman Anna <s-anna@...com>
> ---
> arch/arm64/boot/dts/ti/Makefile | 3 +-
> .../dts/ti/k3-j7200-common-proc-board.dts | 64 +++++++++++++++++++
> arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi | 29 +++++++++
> 3 files changed, 95 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> create mode 100644 arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
>
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index b397945fdf73..7b0b176eab1b 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -8,4 +8,5 @@
>
> dtb-$(CONFIG_ARCH_K3_AM6_SOC) += k3-am654-base-board.dtb
>
> -dtb-$(CONFIG_ARCH_K3_J721E_SOC) += k3-j721e-common-proc-board.dtb
> +dtb-$(CONFIG_ARCH_K3_J721E_SOC) += k3-j721e-common-proc-board.dtb \
> + k3-j7200-common-proc-board.dtb
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> new file mode 100644
> index 000000000000..e27069317c4e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> @@ -0,0 +1,64 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +
> +#include "k3-j7200-som-p0.dtsi"
> +
> +/ {
> + chosen {
> + stdout-path = "serial2:115200n8";
> + bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
> + };
> +};
> +
> +&wkup_uart0 {
> + /* Wakeup UART is used by System firmware */
> + status = "disabled";
> +};
> +
> +&main_uart0 {
> + power-domains = <&k3_pds 146 TI_SCI_PD_SHARED>;
> +};
> +
> +&main_uart2 {
> + /* MAIN UART 2 is used by R5F firmware */
> + status = "disabled";
> +};
> +
> +&main_uart3 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart4 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart5 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart6 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart7 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart8 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> +
> +&main_uart9 {
> + /* UART not brought out */
> + status = "disabled";
> +};
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
> new file mode 100644
> index 000000000000..22fc50bd5c4c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
> @@ -0,0 +1,29 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +
> +#include "k3-j7200.dtsi"
> +
> +/ {
> + memory@...00000 {
> + device_type = "memory";
> + /* 4G RAM */
> + reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
> + <0x00000008 0x80000000 0x00000000 0x80000000>;
> + };
> +
> + reserved_memory: reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + secure_ddr: optee@...00000 {
> + reg = <0x00 0x9e800000 0x00 0x01800000>;
> + alignment = <0x1000>;
> + no-map;
> + };
> + };
> +};
>
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