May 2024 - U-Boot

[PATCH] fs: ubifs: Add support for ZSTD decompression
by Piotr Wojtaszczyk 04 Jun '24

04 Jun '24

ZSTD can be a better tradeoff between NAND IO operations and decompression speed giving a better boot time. Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk(a)timesys.com> --- fs/ubifs/ubifs-media.h | 2 ++ fs/ubifs/ubifs.c | 53 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 53 insertions(+), 2 deletions(-) diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h index 2b5b26a01b..299d80f928 100644 --- a/fs/ubifs/ubifs-media.h +++ b/fs/ubifs/ubifs-media.h @@ -320,12 +320,14 @@ enum { * UBIFS_COMPR_NONE: no compression * UBIFS_COMPR_LZO: LZO compression * UBIFS_COMPR_ZLIB: ZLIB compression + * UBIFS_COMPR_ZSTD: ZSTD compression * UBIFS_COMPR_TYPES_CNT: count of supported compression types */ enum { UBIFS_COMPR_NONE, UBIFS_COMPR_LZO, UBIFS_COMPR_ZLIB, + UBIFS_COMPR_ZSTD, UBIFS_COMPR_TYPES_CNT, }; diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c index a509584e5d..ff3945e7fd 100644 --- a/fs/ubifs/ubifs.c +++ b/fs/ubifs/ubifs.c @@ -27,6 +27,11 @@ #include <linux/err.h> #include <linux/lzo.h> +#if IS_ENABLED(CONFIG_ZSTD) +#include <linux/zstd.h> +#include <abuf.h> +#endif + DECLARE_GLOBAL_DATA_PTR; /* compress.c */ @@ -42,6 +47,25 @@ static int gzip_decompress(const unsigned char *in, size_t in_len, (unsigned long *)out_len, 0, 0); } +#if IS_ENABLED(CONFIG_ZSTD) +static int zstd_decompress_wrapper(const unsigned char *in, size_t in_len, + unsigned char *out, size_t *out_len) +{ + struct abuf abuf_in, abuf_out; + int ret; + + abuf_init_set(&abuf_in, (void *)in, in_len); + abuf_init_set(&abuf_out, (void *)out, *out_len); + + ret = zstd_decompress(&abuf_in, &abuf_out); + if (ret < 0) + return ret; + + *out_len = ret; + return 0; +} +#endif + /* Fake description object for the "none" compressor */ static struct ubifs_compressor none_compr = { .compr_type = UBIFS_COMPR_NONE, @@ -71,8 +95,21 @@ static struct ubifs_compressor zlib_compr = { .decompress = gzip_decompress, }; +#if IS_ENABLED(CONFIG_ZSTD) +static struct ubifs_compressor zstd_compr = { + .compr_type = UBIFS_COMPR_ZSTD, +#ifndef __UBOOT__ + .comp_mutex = &zstd_enc_mutex, + .decomp_mutex = &zstd_dec_mutex, +#endif + .name = "zstd", + .capi_name = "zstd", + .decompress = zstd_decompress_wrapper, +}; +#endif + /* All UBIFS compressors */ -struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; +struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT] = {NULL}; #ifdef __UBOOT__ @@ -166,8 +203,14 @@ int ubifs_decompress(const struct ubifs_info *c, const void *in_buf, compr = ubifs_compressors[compr_type]; + if (unlikely(!compr)) { + ubifs_err(c, "compression type %d is not compiled in", compr_type); + return -EINVAL; + } + if (unlikely(!compr->capi_name)) { - ubifs_err(c, "%s compression is not compiled in", compr->name); + ubifs_err(c, "%s compression is not compiled in", + compr->name ? compr->name : "unknown"); return -EINVAL; } @@ -232,6 +275,12 @@ int __init ubifs_compressors_init(void) if (err) return err; +#if IS_ENABLED(CONFIG_ZSTD) + err = compr_init(&zstd_compr); + if (err) + return err; +#endif + err = compr_init(&none_compr); if (err) return err; -- 2.25.1

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[PATCH v1 0/5] FUSB302 USB-C controller support
by Sebastian Reichel 04 Jun '24

04 Jun '24

Hi, On ROCK 5B power is usually supplied via it's USB-C port. This port has the data lines connected to RK3588, VBUS connected to the input regulator and CC pins connected to FUSB302. FUSB302 is a USB-C controller, which can be accessed via I2C from RK3588. The USB-C controller is needed to figure out the USB-C cable orientation, but also to do USB PD communication. Thus it would be great to enable support for it in the operating system. But the USB-PD specification requires, that a device reacts to USB-PD messages send by the power-supply within around 5 seconds. If that does not happen the power-supply assumes, that the device does not support USB-PD. If a device later starts sending USB-PD messages it is considered an error, which is solved by doing a hard reset. A USB-PD hard reset means, that all supply voltages are removed for a short period of time. For boards, which are solely powered through their USB-C port, like the Radxa Rock 5B, this results in an machine reset. This is currently worked around by not describing the FUSB302 in the kernel DT, so nothing will ever speak USB-PD on the Rock 5B. This means 1. the USB-C port cannot be used at all 2. the board will be running via fallback supply, which provides limited power capabilities In order to avoid the hard reset, this adds FUSB302 support to U-Boot, so that we react to the power-supply's queries in time. The code, which is originally from the Linux kernel, consists of two parts: 1. the tcpm state machine, which implements the Type C port manager state machine as described in the USB PD specification 2. the fusb302 driver, which knows about specific registers Especially the first part has been heavily modified compared to the kernel, which makes use of multiple delayed works and threads. For this I used a priorly ported version from Rockchip, removed their hacks and any states not necessary in U-Boot (e.g. audio accessory support). Greetings, -- Sebastian Sebastian Reichel (5): usb: tcpm: add core framework usb: tcpm: fusb302: add driver board: rock5b-rk3588: add USB-C controller support board: rock5b-rk3588: enable USB-C in operating system MAINTAINERS: add TCPM section MAINTAINERS | 8 + Makefile | 1 + arch/arm/dts/rk3588-rock-5b-u-boot.dtsi | 28 + board/radxa/rock5b-rk3588/Makefile | 6 + board/radxa/rock5b-rk3588/rock5b-rk3588.c | 33 + cmd/Kconfig | 7 + cmd/Makefile | 1 + cmd/tcpm.c | 117 + configs/rock5b-rk3588_defconfig | 5 + drivers/usb/Kconfig | 2 + drivers/usb/tcpm/Kconfig | 16 + drivers/usb/tcpm/Makefile | 4 + drivers/usb/tcpm/fusb302.c | 1427 ++++++++++++ drivers/usb/tcpm/fusb302_reg.h | 177 ++ drivers/usb/tcpm/tcpm.c | 2406 +++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/usb/pd.h | 516 +++++ include/usb/tcpm.h | 116 + 18 files changed, 4871 insertions(+) create mode 100644 board/radxa/rock5b-rk3588/Makefile create mode 100644 board/radxa/rock5b-rk3588/rock5b-rk3588.c create mode 100644 cmd/tcpm.c create mode 100644 drivers/usb/tcpm/Kconfig create mode 100644 drivers/usb/tcpm/Makefile create mode 100644 drivers/usb/tcpm/fusb302.c create mode 100644 drivers/usb/tcpm/fusb302_reg.h create mode 100644 drivers/usb/tcpm/tcpm.c create mode 100644 include/usb/pd.h create mode 100644 include/usb/tcpm.h -- 2.43.0

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[GIT PULL] u-boot-riscv/master
by Leo Liang 03 Jun '24

03 Jun '24

Hi Tom, The following changes since commit 46ff00bea5dd2dd247d5e2fdadbf5dcf8653cd9a: Merge tag 'tpm-master-27052024' of https://source.denx.de/u-boot/custodians/u-boot-tpm (2024-05-27 08:56:02 -0600) are available in the Git repository at: https://source.denx.de/u-boot/custodians/u-boot-riscv.git for you to fetch changes up to 1d29c718b7ba09807f8060796d9c21772e3c1b52: andes: Use UCCTLCOMMAND instead of MCCTLCOMMAND (2024-05-30 16:01:13 +0800) CI result shows no issue: https://source.denx.de/u-boot/custodians/u-boot-riscv/-/pipelines/20920 ---------------------------------------------------------------- - board: fix support for icicle - board: support Star64 board - andes: minor fixes - riscv: deprecate cache enablement in start.S ---------------------------------------------------------------- Conor Dooley (2): board: microchip: icicle: correct type for node offset board: microchip: icicle: make both ethernets optional H Bell (2): board: starfive: support Pine64 Star64 board board: starfive: support Pine64 Star64 board Leo Yu-Chi Liang (3): andes: l2 cache driver: fixes typos and cctl status riscv: remove cache enablement in start.S andes: Use UCCTLCOMMAND instead of MCCTLCOMMAND arch/riscv/cpu/andes/cache.c | 4 +- arch/riscv/cpu/start.S | 4 - arch/riscv/include/asm/arch-andes/csr.h | 2 +- board/microchip/mpfs_icicle/mpfs_icicle.c | 25 +-- board/starfive/visionfive2/spl.c | 89 ++++++++++ board/starfive/visionfive2/starfive_visionfive2.c | 4 + doc/board/starfive/index.rst | 1 + doc/board/starfive/pine64_star64.rst | 201 ++++++++++++++++++++++ drivers/cache/cache-andes-l2.c | 8 +- 9 files changed, 310 insertions(+), 28 deletions(-) create mode 100644 doc/board/starfive/pine64_star64.rst Best regards, Leo

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[PATCH 1/2] imx8mm-cl-iot-gate: Add support for Samsung 4GB DDR
by Fabio Estevam 03 Jun '24

03 Jun '24

From: Fabio Estevam <festevam(a)denx.de> Newer versions of the imx8mm-cl-iot-gate boards may come populated with a Samsung 4GB DDR model. Add support for it. Signed-off-by: Fabio Estevam <festevam(a)denx.de> --- board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c b/board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c index b230478b611a..f1048a1ab2ab 100644 --- a/board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c +++ b/board/compulab/imx8mm-cl-iot-gate/ddr/ddr.c @@ -47,7 +47,9 @@ struct lpddr4_desc { static const struct lpddr4_desc lpddr4_array[] = { { .name = "Nanya", .id = 0x05000010, .subind = 0xff, .size = 2048, .count = 1, .timing = &ucm_dram_timing_01061010}, - { .name = "Samsung", .id = 0x01061010, .subind = 0xff, + { .name = "Samsung", .id = 0x01061010, .subind = 0x04, + .size = 4096, .count = 1, .timing = &ucm_dram_timing_ff000110}, + { .name = "Samsung", .id = 0x01061010, .subind = 0x02, .size = 2048, .count = 1, .timing = &ucm_dram_timing_01061010}, { .name = "Kingston", .id = 0xff000010, .subind = 0x04, .size = 4096, .count = 1, .timing = &ucm_dram_timing_ff000110}, -- 2.34.1

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[PATCH 0/4] Support all phyCORE-i.MX8MP RAM variants
by Teresa Remmet 03 Jun '24

03 Jun '24

Add support for several RAM sizes and speed grades for phyCORE-i.MX8MP. We have support with this series for: - 1GB 1.5GHz - 1GB 2GHz - 2GB 1.5GHz (was supported before) - 2GB 2GHz (was supported before) - 4GB 1.5GHz - 4GB 2GHz - 8GB 2GHz RAM size and speed grade is detected and set using EEPROM data on default. Alternative it is possible to set fix RAM size and speed over Kconfig. Teresa Benjamin Hahn (1): board: phycore_imx8mp: enable setting 2GHz timings without RAM size Teresa Remmet (3): board: phytec: phycore-imx8mp: spl: Fix syle issue board: phytec: phycore_imx8mp: Add support for different RAM sizes board: phytec: phycore_imx8mp: Make RAM size configuration fix board/phytec/phycore_imx8mp/Kconfig | 67 ++++++++ board/phytec/phycore_imx8mp/lpddr4_timing.c | 153 +++++++++++++++++++ board/phytec/phycore_imx8mp/lpddr4_timing.h | 16 ++ board/phytec/phycore_imx8mp/phycore-imx8mp.c | 11 ++ board/phytec/phycore_imx8mp/spl.c | 136 +++++++++-------- include/configs/phycore_imx8mp.h | 4 +- 6 files changed, 322 insertions(+), 65 deletions(-) create mode 100644 board/phytec/phycore_imx8mp/lpddr4_timing.h -- 2.34.1

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[PATCH 0/2] Migrate PHYTEC imx8m boards to OF_UPSTREAM
by Yannic Moog 03 Jun '24

03 Jun '24

- update MAINTAINERS - delete synced dt files - imply OF_UPSTREAM - update default device tree --- Yannic Moog (2): arm: imx8mm-phycore: move to OF_UPSTREAM arm: imx8mp-phycore: move to OF_UPSTREAM arch/arm/dts/Makefile | 3 - arch/arm/dts/imx8mm-phyboard-polis-rdk.dts | 460 -------------------------- arch/arm/dts/imx8mm-phycore-som.dtsi | 440 ------------------------- arch/arm/dts/imx8mm-phygate-tauri-l.dts | 489 ---------------------------- arch/arm/dts/imx8mp-phyboard-pollux-rdk.dts | 361 -------------------- arch/arm/dts/imx8mp-phycore-som.dtsi | 323 ------------------ arch/arm/mach-imx/imx8m/Kconfig | 2 + board/phytec/phycore_imx8mm/MAINTAINERS | 3 - board/phytec/phycore_imx8mp/MAINTAINERS | 1 - configs/imx8mm-phygate-tauri-l_defconfig | 2 +- configs/phycore-imx8mm_defconfig | 2 +- configs/phycore-imx8mp_defconfig | 2 +- 12 files changed, 5 insertions(+), 2083 deletions(-) --- base-commit: cecb5fbb42c8b3de3d5a7df40bc01d1fdf4731d3 change-id: 20240523-phytec_imx8_of_upstream-0a7d440038c9 Best regards, -- Yannic Moog <y.moog(a)phytec.de>

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[PATCH v1 0/5] board: toradex: Add new Verdin and Aquila SKUs
by Emanuele Ghidoli 03 Jun '24

03 Jun '24

From: Emanuele Ghidoli <emanuele.ghidoli(a)toradex.com> Hi, This series adds support for 0090 PID4 Verdin iMX8M Mini Quad 4GB WB ET SKU. It also adds two new SKUs config block support: 0088 Aquila AM69 Octa 32GB WB IT and 0089 Verdin iMX95 Hexa 16GB WB IT. Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli(a)toradex.com> Emanuele Ghidoli (5): board: toradex: verdin-imx8mm: add 4 GB lpddr4 memory support board: toradex: verdin-imx8mm: increase maximum addressable ram to 4GB toradex: tdx-cfg-block: add aquila am69 sku 0088 pid4 toradex: tdx-cfg-block: add verdin imx95 sku 0089 pid4 toradex: tdx-cfg-block: add verdin i.mx8m mini 0090 pid4 board/toradex/common/tdx-cfg-block.c | 3 +++ board/toradex/common/tdx-cfg-block.h | 3 +++ board/toradex/verdin-imx8mm/lpddr4_timing.c | 14 +++++++------- board/toradex/verdin-imx8mm/verdin-imx8mm.c | 5 +++-- include/configs/verdin-imx8mm.h | 6 ++++-- 5 files changed, 20 insertions(+), 11 deletions(-) -- 2.34.1

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[PATCH v2 0/2] Add eFuse access for ZynqMP
by lukas.funke-oss＠weidmueller.com 03 Jun '24

03 Jun '24

From: Lukas Funke <lukas.funke(a)weidmueller.com> This series adds a driver to read and write ZynqMP eFuses [1]. The driver can be accessed by the 'fuse read' and 'fuse write' commands Example: => fuse read 0 0xc 3 Reading bank 0: Word 0x0000000c: 3cb16685 013af244 40000000 Note: Accessing eFuses requires eFuse access to be enabled in the underlying PMU firmware. Use cases are: - Reading/writing user specific eFuses to enable device specific implementations - Revoking SPK IDs - Reading SoC version/DNA [1] https://docs.amd.com/r/en-US/ug1085-zynq-ultrascale-trm/eFUSE Changes in v2: - Drop vendor specific fuse cmd, use existing fuse cmd - Minor code refactoring (reverse x-mas tree) Lukas Funke (2): firmware: zynqmp: Add support to access efuses drivers: misc: Add driver to access ZynqMP efuses drivers/firmware/firmware-zynqmp.c | 31 +++ drivers/misc/Kconfig | 8 + drivers/misc/Makefile | 1 + drivers/misc/zynqmp_efuse.c | 324 +++++++++++++++++++++++++++++ include/zynqmp_firmware.h | 2 + 5 files changed, 366 insertions(+) create mode 100644 drivers/misc/zynqmp_efuse.c -- 2.30.2

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[PATCH v5 00/23] EFI: ti: Enable EFI capsule updates
by Jonathan Humphreys 03 Jun '24

03 Jun '24

Enable on disk capsule updates, which includes defining the firmware components (tiboot3, spl, u-boot) and enabling processing of raw capsule updates. This is enabled for several TI SoC based platforms: AM64, AM62, AM62p, AM69, BeaglePlay, J7, and BeagleboneAI. This series also includes enabling seral flash DFU for AM62 and MMC DFU for beagleplay. Changes from v1: - Added sysfw.itb capsule definition to beagleboneai64 - removed extra commas in structure definitions Changes from v2: - Added documentation on OSPI flash layouts - Improved comments for capsule GUIDs definitions - Defined board unique capsule GUIDs and put definitions in board specific files - Added a Capsule Update porting section to the documentation Changes from v3: - Added better commit messages based upon checkpatch warnings. - Remove conditional inclusion of capsule update firmware info - Converted OSPI layout diagram to svg format Link to v3: https://lore.kernel.org/r/20240419205701.163821-1-j-humphreys@ti.com Changes from v4: - Added am69 SK board - Corrected a few spelling mistakes and clarity improvements in k3 docs section - Added CONFIG_SET_DFU_ALT_INFO guard around set_dfu_alt_info() Link to v4: https://lore.kernel.org/r/20240509164123.1753050-1-j-humphreys@ti.com Jonathan Humphreys (23): doc: uefi: capsules: Add Capsule Update porting section doc: ti: k3: Correct spelling mistakes and improve clarity board: am64x: Define capsule update firmware info configs: am64x: Enable EFI capsule update doc: board: ti: am64x: document OSPI layout board: j721e: Define capsule update firmware info configs: j721e: Enable EFI capsule update doc: board: ti: j721e: document OSPI layout board: beagleplay: Define capsule update firmware info configs: beagleplay: Enable DFU for MMC configs: beagleplay: Enable EFI capsule update board: am62x: Define capsule update firmware info configs: am62x: Enable EFI capsule update doc: board: ti: am62x: document OSPI layout board: am62px: Define capsule update firmware info configs: am62px: Enable EFI capsule update doc: board: ti: am62px: document OSPI layout board: beagleboneai64: Define capsule update firmware info configs: beagleboneai64: Enable EFI capsule update configs: j784s4_evm: Enable serial flash DFU support board: sk-am69: Define capsule update firmware info configs: j784s4: Enable EFI capsule update doc: board: ti: j784s4: document OSPI NOR layout board/beagle/beagleboneai64/Kconfig | 4 +- board/beagle/beagleboneai64/beagleboneai64.c | 39 + board/beagle/beagleplay/Kconfig | 4 +- board/beagle/beagleplay/beagleplay.c | 34 + board/ti/am62px/evm.c | 34 + board/ti/am62x/evm.c | 34 + board/ti/am64x/evm.c | 34 + board/ti/j721e/evm.c | 40 + board/ti/j784s4/evm.c | 34 + configs/am62px_evm_a53_defconfig | 2 + configs/am62x_beagleplay_a53_defconfig | 5 + configs/am62x_evm_a53_defconfig | 2 + configs/am64x_evm_a53_defconfig | 2 + configs/j721e_beagleboneai64_a72_defconfig | 2 + configs/j721e_evm_a72_defconfig | 2 + configs/j784s4_evm_a72_defconfig | 5 + doc/board/ti/am62px_sk.rst | 24 + doc/board/ti/am62x_sk.rst | 24 + doc/board/ti/am64x_evm.rst | 24 + doc/board/ti/img/ospi_sysfw-am64.svg | 802 ++++++++++ doc/board/ti/img/ospi_sysfw.svg | 1464 ++++++++++-------- doc/board/ti/img/ospi_sysfw2.svg | 802 ++++++++++ doc/board/ti/img/ospi_sysfw3.svg | 802 ++++++++++ doc/board/ti/j721e_evm.rst | 58 +- doc/board/ti/j784s4_evm.rst | 28 + doc/board/ti/k3.rst | 10 +- doc/develop/uefi/uefi.rst | 12 + include/configs/am62px_evm.h | 24 + include/configs/am62x_evm.h | 24 + include/configs/am64x_evm.h | 24 + include/configs/beagleboneai64.h | 55 + include/configs/beagleplay.h | 41 + include/configs/j721e_evm.h | 29 + include/configs/j784s4_evm.h | 24 + 34 files changed, 3864 insertions(+), 684 deletions(-) create mode 100644 doc/board/ti/img/ospi_sysfw-am64.svg create mode 100644 doc/board/ti/img/ospi_sysfw2.svg create mode 100644 doc/board/ti/img/ospi_sysfw3.svg create mode 100644 include/configs/beagleboneai64.h create mode 100644 include/configs/beagleplay.h -- 2.34.1

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[PATCH v2 0/3] arm: dts: am62-beagleplay: Fix Beagleplay Ethernet
by Roger Quadros 01 Jun '24

01 Jun '24

Sync AM62 device tree files with Linux v6.9 and add in the missing bits in -u-boot.dtsi to get CPSW Ethernet working. CI testing https://github.com/u-boot/u-boot/pull/534 Signed-off-by: Roger Quadros <rogerq(a)kernel.org> --- --- Changes in v2: - rebase on u-boot/next 13th May 2024 - drop 'not-for-merge' comment for patch 3 as it can now be merged - Link to v1: https://lore.kernel.org/r/20240425-for-2024-07-beagleplay-eth-v1-0-6c985de1… --- Roger Quadros (3): arm: dts: k3-am62*: sync with Linux v6.9 arm: dts: k3-am625-beagleplay: get CPSW Ethernet to work arm: dts: k3-am625-beagleplay: Fix Ethernet PHY reset GPIO arch/arm/dts/k3-am62-main.dtsi | 126 ++++++++++++++--- arch/arm/dts/k3-am62-mcu.dtsi | 4 +- arch/arm/dts/k3-am62-thermal.dtsi | 5 +- arch/arm/dts/k3-am62-wakeup.dtsi | 38 +++-- arch/arm/dts/k3-am62.dtsi | 4 +- arch/arm/dts/k3-am625-beagleplay-u-boot.dtsi | 63 +++++++++ arch/arm/dts/k3-am625-beagleplay.dts | 66 ++++----- arch/arm/dts/k3-am625-sk.dts | 4 +- arch/arm/dts/k3-am625.dtsi | 4 +- arch/arm/dts/k3-am62a-main.dtsi | 201 +++++++++++++++++++++++++-- arch/arm/dts/k3-am62a-mcu.dtsi | 4 +- arch/arm/dts/k3-am62a-thermal.dtsi | 5 +- arch/arm/dts/k3-am62a-wakeup.dtsi | 4 +- arch/arm/dts/k3-am62a.dtsi | 4 +- arch/arm/dts/k3-am62a7-sk.dts | 162 ++++++++++++++++++++- arch/arm/dts/k3-am62a7.dtsi | 4 +- arch/arm/dts/k3-am62x-sk-common.dtsi | 24 +++- 17 files changed, 621 insertions(+), 101 deletions(-) --- base-commit: c67199962b2a819a4b0ae8d57dc68b7cadee0c9e change-id: 20240305-for-2024-07-beagleplay-eth-f82a51197937 Best regards, -- Roger Quadros <rogerq(a)kernel.org>

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