[PATCH v2 0/5] arm: k3: j784s4: Add PCIe boot support

[Kumar, Udit]

On 11/11/2025 11:46 AM, Hrushikesh Salunke wrote:
> This series adds PCIe endpoint boot support for the TI J784S4 SoC.
>
> PCIe boot allows the device to boot as a PCIe endpoint, where the
> bootloader images are loaded by a PCIe host through Device Firmware
> Upgrade (DFU) over PCIe.
>
> The J784S4 SoC uses PCIe1 instance with SERDES0 for endpoint boot.
> To enable this functionality, the SERDES and PCIe peripherals must be
> configured early in the R5 SPL stage before the bootloader images can
> be transferred from the host.
>
> This series:
> 1. Adds the required clock and device data for SERDES0 and PCIe1
> 2. Enables Cadence Torrent PHY driver at SPL stage
> 3. Enables J721E WIZ SERDES wrapper driver at SPL stage
> 4. Enables PCIe boot configs for R5 and A72 stage

I assume you might have changed device tree to PCIEe EP,

I suggest , adding this in J784s4 board doc. (If any changes are done to 
test this feature and not part of this series)


>
> This feature has been tested on J784S4 EVM. Following are the logs
> corresponding to this feature.
>
> https://gist.github.com/hrushikesh221/cf48b512eb4cd90c1612ad2e531b8ffe
>
> Program used to copy bootloaders from PCIe Root-Complex to Endpoint:
>
> https://gist.github.com/hrushikesh221/94e6042dbd717c74b74a5c9fc8ec5b6c
>
> This series is based on commit :
> 6b27b688694 Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sh
>
> Changes in v2:
> - Fixed SPDX license identifier to use "GPL-2.0-or-later" instead of "GPL-2.0+"
>    in clk-data.c and dev-data.c
> - Changed SPL_PHY_CADENCE_TORRENT config type from "tristate" to "bool"
> - Changed SPL_PHY_J721E_WIZ config type from "tristate" to "bool"
>
> Hrushikesh Salunke (5):
>    arm: mach-k3: j784s4: Update SoC autogen data to enable PCIe boot
>    phy: cadence: Add config to enable Cadence Torrent PHY at SPL stage
>    phy: ti: Add config to enable J721E WIZ SERDES wrapper at SPL stage
>    configs: j784s4_evm_r5_defconfig: Enable configs for PCIe boot
>    configs: j784s4_evm_a72_defconfig: Enable configs for PCIe boot
>
>   arch/arm/mach-k3/r5/j784s4/clk-data.c | 209 +++++++++++++++++++++++++-
>   arch/arm/mach-k3/r5/j784s4/dev-data.c |  43 +++---
>   configs/j784s4_evm_a72_defconfig      |   7 +
>   configs/j784s4_evm_r5_defconfig       |  13 ++
>   drivers/phy/cadence/Kconfig           |   7 +
>   drivers/phy/ti/Kconfig                |  10 ++
>   6 files changed, 262 insertions(+), 27 deletions(-)
>