From: Akshay Belsare <akshay.belsare@amd.com>
To: <u-boot@lists.u-boot-project.org>, <michal.simek@amd.com>
Cc: <git@amd.com>, <padmarao.begari@amd.com>,
Akshay Belsare <akshay.belsare@amd.com>
Subject: [PATCH 0/3] soc/board: decouple SoC identification reads from firmware calls
Date: Thu, 20 Aug 2026 20:24:16 +0530 [thread overview]
Message-ID: <20260820145459.246717-1-akshay.belsare@amd.com> (raw)
Chip ID, PMC TAP IDCODE/VERSION/USERCODE, and the PGGS boot index are
currently read either directly through MMIO or via firmware, depending
on the platform and configuration. This series introduces common helper
APIs with weak MMIO-based defaults for each platform and firmware-backed
overrides in firmware-zynqmp.c when CONFIG_ZYNQMP_FIRMWARE is enabled.
This removes firmware-specific conditionals from callers, centralizes
the access mechanism, and provides a consistent interface across
ZynqMP, Versal, Versal Net, and Versal Gen 2 platforms.
Akshay Belsare (3):
soc: xilinx: decouple chip ID retrieval from direct firmware calls
soc: xilinx: route PMC TAP register access through firmware
board: xilinx: decouple PGGS boot index read from firmware
arch/arm/mach-versal-net/cpu.c | 34 ++++++++++-
.../mach-versal-net/include/mach/sys_proto.h | 6 ++
arch/arm/mach-versal/cpu.c | 18 ++++++
arch/arm/mach-versal/include/mach/sys_proto.h | 4 ++
arch/arm/mach-versal2/cpu.c | 39 ++++++++++++-
.../arm/mach-versal2/include/mach/sys_proto.h | 8 +++
arch/arm/mach-zynqmp/cpu.c | 8 +++
arch/arm/mach-zynqmp/include/mach/sys_proto.h | 2 +
board/xilinx/common/board.c | 6 +-
drivers/firmware/firmware-zynqmp.c | 57 +++++++++++++++++++
drivers/soc/soc_amd_versal2.c | 23 +++-----
drivers/soc/soc_xilinx_versal.c | 23 +++-----
drivers/soc/soc_xilinx_versal_net.c | 23 +++-----
drivers/soc/soc_xilinx_zynqmp.c | 21 +++----
include/zynqmp_firmware.h | 5 +-
15 files changed, 204 insertions(+), 73 deletions(-)
--
2.34.1
next reply other threads:[~2026-08-20 15:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 14:54 Akshay Belsare [this message]
2026-08-20 14:54 ` [PATCH 1/3] soc: xilinx: decouple chip ID retrieval from direct firmware calls Akshay Belsare
2026-08-20 14:54 ` [PATCH 2/3] soc: xilinx: route PMC TAP register access through firmware Akshay Belsare
2026-08-20 14:54 ` [PATCH 3/3] board: xilinx: decouple PGGS boot index read from firmware Akshay Belsare
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