[PATCH v2 2/2] ARM: imx: imx8mn-evk: use one common u-boot.dtsi for the evk boards
Alper Nebi Yasak
alpernebiyasak at gmail.com
Wed Jun 22 20:16:43 CEST 2022
On 09/06/2022 23:49, Heiko Thiery wrote:
> To have only one place to describe the binman images us the
> imx8mn-u-boot.dtsi. To have support for different DDR firmwares this
> nodes are included dependent on the used DDR config option.
>
> Signed-off-by: Heiko Thiery <heiko.thiery at gmail.com>
> Reviewed-by: Fabio Estevam <festevam at gmail.com>
> ---
> v2: sync with current master and fix merge conflict
>
> arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi | 125 +-----------------
> arch/arm/dts/imx8mn-evk-u-boot.dtsi | 120 +----------------
> arch/arm/dts/imx8mn-u-boot.dtsi | 156 +++++++++++++++++++++++
I see most of this is moving existing definitions, but I'm adding
comments in a general sense, partially for future reference.
> 3 files changed, 159 insertions(+), 242 deletions(-)
> create mode 100644 arch/arm/dts/imx8mn-u-boot.dtsi
>
> diff --git a/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi b/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi
> index 4d0ecb07d4..3d0e817313 100644
> --- a/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi
> +++ b/arch/arm/dts/imx8mn-ddr4-evk-u-boot.dtsi
> @@ -3,11 +3,9 @@
> * Copyright 2019, 2021 NXP
> */
>
> -/ {
> - binman: binman {
> - multiple-images;
> - };
> +#include "imx8mn-u-boot.dtsi"
>
> +/ {
> wdt-reboot {
> compatible = "wdt-reboot";
> wdt = <&wdog1>;
> @@ -143,122 +141,3 @@
> [...]
> diff --git a/arch/arm/dts/imx8mn-evk-u-boot.dtsi b/arch/arm/dts/imx8mn-evk-u-boot.dtsi
> index d1427941eb..339c3dd681 100644
> --- a/arch/arm/dts/imx8mn-evk-u-boot.dtsi
> +++ b/arch/arm/dts/imx8mn-evk-u-boot.dtsi
> @@ -3,6 +3,7 @@
> * Copyright 2019 NXP
> */
>
> +#include "imx8mn-u-boot.dtsi"
> #include "imx8mn-ddr4-evk-u-boot.dtsi"
"imx8mn-ddr4-evk-u-boot.dtsi" already includes "imx8mn-u-boot.dtsi". I
think it should only be included once.
I don't know why these are structured this way, but I think common parts
of the two boards should've been in a "imx8mn-evk-common-u-boot.dtsi" or
something which the board -u-boot.dtsi files would include.
>
> &i2c1 {
> @@ -24,122 +25,3 @@
> [...]
> diff --git a/arch/arm/dts/imx8mn-u-boot.dtsi b/arch/arm/dts/imx8mn-u-boot.dtsi
> new file mode 100644
> index 0000000000..7b591085a0
> --- /dev/null
> +++ b/arch/arm/dts/imx8mn-u-boot.dtsi
> @@ -0,0 +1,156 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright 2019 NXP
> + */
> +
> +/ {
> + binman: binman {
> + multiple-images;
> + };
> +};
> +
> +&binman {
> + u_boot_spl_ddr: u-boot-spl-ddr {
> + filename = "u-boot-spl-ddr.bin";
> + pad-byte = <0xff>;
> + align-size = <4>;
> + align = <4>;
> +
> + u-boot-spl {
> + align-end = <4>;
> + };
Maybe it's better to add an empty 'ddr-fw' section here, and populate
that below.
> + };
> +
> + spl {
> + filename = "spl.bin";
> +
> + mkimage {
> + args = "-n spl/u-boot-spl.cfgout -T imx8mimage -e 0x912000";
> +
> + blob {
> + filename = "u-boot-spl-ddr.bin";
> + };
> + };
> + };
> +
> + itb {
> + filename = "u-boot.itb";
> +
> + fit {
> + description = "Configuration to load ATF before U-Boot";
> + #address-cells = <1>;
> + fit,external-offset = <CONFIG_FIT_EXTERNAL_OFFSET>;
> +
> + images {
> + uboot {
> + description = "U-Boot (64-bit)";
> + type = "standalone";
> + arch = "arm64";
> + compression = "none";
> + load = <CONFIG_SYS_TEXT_BASE>;
> +
> + uboot_blob: blob-ext {
> + filename = "u-boot-nodtb.bin";
> + };
> + };
> +
> + atf {
> + description = "ARM Trusted Firmware";
> + type = "firmware";
> + arch = "arm64";
> + compression = "none";
> + load = <0x960000>;
> + entry = <0x960000>;
> +
> + atf_blob: blob-ext {
> + filename = "bl31.bin";
> + };
> + };
> +
> + fdt {
> + description = "NAME";
> + type = "flat_dt";
> + compression = "none";
> +
> + uboot_fdt_blob: blob-ext {
> + filename = "u-boot.dtb";
> + };
> + };
These three 'blob-ext's would normally be 'u-boot-nodtb', 'atf-bl31',
and 'u-boot-dtb' entries respectively.
> + };
> +
> + configurations {
> + default = "conf";
> +
> + conf {
> + description = "NAME";
This 'NAME' (and the fdt one) shows up in `mkimage -l u-boot.itb`
output. Perhaps they were originally copied from a @fdt-SEQ version
(which replaces it with the actual dtb filename).
> + firmware = "uboot";
> + loadables = "atf";
> + fdt = "fdt";
> + };
> + };
> + };
> + };
> +
> + imx-boot {
> + filename = "flash.bin";
> + pad-byte = <0x00>;
> +
> + spl: blob-ext at 1 {
> + offset = <0x0>;
> + filename = "spl.bin";
> + };
> +
> + uboot: blob-ext at 2 {
> + offset = <0x58000>;
> + filename = "u-boot.itb";
> + };
> + };
I dislike having 'blob-ext's as names, they should be descriptive.
'imx8mm-u-boot.dtsi' has these labels as node names which is slightly
better.
> +};
> +
> +#ifdef CONFIG_IMX8M_DDR4
> +&u_boot_spl_ddr {
> + blob_1: blob-ext at 1 {
> + filename = "ddr4_imem_1d_201810.bin";
> + size = <0x8000>;
> + };
> +
> + blob_2: blob-ext at 2 {
> + filename = "ddr4_dmem_1d_201810.bin";
> + size = <0x4000>;
> + };
> +
> + blob_3: blob-ext at 3 {
> + filename = "ddr4_imem_2d_201810.bin";
> + size = <0x8000>;
> + };
> +
> + blob_4: blob-ext at 4 {
> + filename = "ddr4_dmem_2d_201810.bin";
> + size = <0x4000>;
> + };
> +};
> +#elif CONFIG_IMX8M_LPDDR4
> +&u_boot_spl_ddr {
> + blob_1: blob-ext at 1 {
> + filename = "lpddr4_pmu_train_1d_imem.bin";
> + size = <0x8000>;
> + };
> +
> + blob_2: blob-ext at 2 {
> + filename = "lpddr4_pmu_train_1d_dmem.bin";
> + size = <0x4000>;
> + };
> +
> + blob_3: blob-ext at 3 {
> + filename = "lpddr4_pmu_train_2d_imem.bin";
> + size = <0x8000>;
> + };
> +
> + blob_4: blob-ext at 4 {
> + filename = "lpddr4_pmu_train_2d_dmem.bin";
> + size = <0x4000>;
> + };
> +};
These conflict a bit with one of Peng's series which changes the names
and removes the size for these blobs, see [1] [2].
[1] arm: dts: imx8m: update binman ddr firmware node name
https://lore.kernel.org/u-boot/20220603071715.15212-4-peng.fan@oss.nxp.com/
[2] arm: dts: imx8m: shrink ddr firmware size to actual file size
https://lore.kernel.org/u-boot/20220603071715.15212-7-peng.fan@oss.nxp.com/
> +#else
> + #error "no valid ddr config selected"
There's also IMX8M_DDR3L, see imx8mn-bsh-smm-s2-u-boot-common.dtsi
> +#endif
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