[PATCH 2/4] arm: dts: Add support for AM62x LP SK

[Nishanth Menon]

On 13:51-20230927, Nitin Yadav wrote:
> The AM62x LP SK board is similar to the AM62x SK board,
> but has some significant changes that requires different
> device tree.
> 
> The differences are mainly:
> - AM62x SoC in the AMC package that meets AECQ100 automotive standard.
> - LPDDR4 versus DDR4 on the AM62x SK.
> - TPS65219 PMIC instead of discrete regulators.
> - IO expander pin names are wired differently.
> - Second ethernet port is currently disabled as the boards do not have
>   the part physically installed.
> - OSPI NAND vs OSPI NOR.
> - No WLAN chip instead a SDIO M.2 connector.
> 
> Signed-off-by: Nitin Yadav <n-yadav at ti.com>
> ---
>  arch/arm/dts/Makefile                         |    2 +
>  arch/arm/dts/k3-am62-lp-sk-u-boot.dtsi        |    9 +
>  arch/arm/dts/k3-am62-lp-sk.dts                |  231 ++

>  arch/arm/dts/k3-am62-r5-lp-sk.dts             |   21 +
>  arch/arm/dts/k3-am62x-ddr-lp4-50-800-800.dtsi | 2190 +++++++++++++++++
>  5 files changed, 2453 insertions(+)
>  create mode 100644 arch/arm/dts/k3-am62-lp-sk-u-boot.dtsi
>  create mode 100644 arch/arm/dts/k3-am62-lp-sk.dts
>  create mode 100644 arch/arm/dts/k3-am62-r5-lp-sk.dts
>  create mode 100644 arch/arm/dts/k3-am62x-ddr-lp4-50-800-800.dtsi
> 
> diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
> index bde2176ec7..72ea57885f 100644
> --- a/arch/arm/dts/Makefile
> +++ b/arch/arm/dts/Makefile
> @@ -1337,6 +1337,8 @@ dtb-$(CONFIG_SOC_K3_AM642) += k3-am642-evm.dtb \
>  
>  dtb-$(CONFIG_SOC_K3_AM625) += k3-am625-sk.dtb \
>  			      k3-am625-r5-sk.dtb \
> +			      k3-am62-lp-sk.dtb \
> +			      k3-am62-r5-lp-sk.dtb \
>  			      k3-am625-beagleplay.dtb \
>  			      k3-am625-r5-beagleplay.dtb \
>  			      k3-am625-verdin-wifi-dev.dtb \
> diff --git a/arch/arm/dts/k3-am62-lp-sk-u-boot.dtsi b/arch/arm/dts/k3-am62-lp-sk-u-boot.dtsi
> new file mode 100644
> index 0000000000..7da94fe4b6
> --- /dev/null
> +++ b/arch/arm/dts/k3-am62-lp-sk-u-boot.dtsi
> @@ -0,0 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * AM62x LP SK dts file for SPLs
> + * Copyright (C) 2021-2023 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +#include "k3-am62x-sk-common-u-boot.dtsi"
> +
> +#include "k3-am62-lp-sk-binman.dtsi"

Are you sure you don't need the dt phase properties for regulators for
mmc to work?

> diff --git a/arch/arm/dts/k3-am62-lp-sk.dts b/arch/arm/dts/k3-am62-lp-sk.dts

Is this coming in from v6.6-rc1 if so document that in commit message.

[...]

> diff --git a/arch/arm/dts/k3-am62-r5-lp-sk.dts b/arch/arm/dts/k3-am62-r5-lp-sk.dts
> new file mode 100644
> index 0000000000..ed2c028bad
> --- /dev/null
> +++ b/arch/arm/dts/k3-am62-r5-lp-sk.dts
> @@ -0,0 +1,21 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * AM62x LP SK dts file for R5 SPL
> + * Copyright (C) 2021-2023 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +#include "k3-am62-lp-sk.dts"
> +#include "k3-am62x-ddr-lp4-50-800-800.dtsi"
> +#include "k3-am62-ddr.dtsi"
> +
> +#include "k3-am62-lp-sk-u-boot.dtsi"
> +#include "k3-am62x-r5-sk-common.dtsi"
> +
> +/ {
> +	memory at 80000000 {
> +		device_type = "memory";
> +		/* 2G RAM */
> +		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
> +		bootph-pre-ram;
> +	};
> +};

NAK. should come from board.dts.

> diff --git a/arch/arm/dts/k3-am62x-ddr-lp4-50-800-800.dtsi b/arch/arm/dts/k3-am62x-ddr-lp4-50-800-800.dtsi
> new file mode 100644
> index 0000000000..74693d12e1
> --- /dev/null
> +++ b/arch/arm/dts/k3-am62x-ddr-lp4-50-800-800.dtsi
> @@ -0,0 +1,2190 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * This file was generated with the
> + * AM62x SysConfig DDR Subsystem Register Configuration Tool v0.08.61
> + * Tue Mar 22 2022 17:03:08 GMT-0500 (Central Daylight Time)

Are you sure this does'nt need a sync up to latest?

> + * DDR Type: LPDDR4

Would be good to document the exact DDR part.

> + * F0 = 50MHz    F1 = 800MHz    F2 = 800MHz
> + * Density (per channel): 16Gb
> + * Number of Ranks: 1
> + */
> +

	[...]

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D