[PATCH 0/7] soc: aspeed: Add AST2600 eSPI controller support

aspeedyh
2026-03-13T10:08:36Z

This series adds initial support for the eSPI controller found on ASPEED
AST2600 BMC SoCs.

The series introduces a eSPI controller framework for ASPEED SoCs under
drivers/soc/aspeed/, adds AST2600-specific controller support for
peripheral and flash channels, defines the corresponding devicetree
binding, and adds the AST2600 eSPI controller node to the SoC dtsi.

The driver is intended to support host-BMC communication over the BMC-side
eSPI slave controller present on AST2600 systems.

Patch summary:
1. dt-bindings: soc: aspeed: Add AST2600 eSPI controller
2. soc: aspeed: Introduce core eSPI controller support
3. soc: aspeed: Add AST2600 peripheral channel port I/O support
4. soc: aspeed: Add eSPI TAFS backend support
5. soc: aspeed: Add espi flash channel support
6. soc: aspeed: Add sysfs controls for flash LUN selection
7. arm: dts: aspeed: Add eSPI node for AST2600

This series has been tested on AST2600 platform with Intel's host eSPI
controller.

Signed-off-by: aspeedyh <yh_chung@aspeedtech.com>
---
aspeedyh (7):
dt-bindings: soc: aspeed: Add AST2600 eSPI controller
soc: aspeed: Introduce core eSPI controller support
soc: aspeed: Add AST2600 peripheral channel port I/O support
soc: aspeed: Add eSPI TAFS backend support
soc: aspeed: Add eSPI flash channel support
soc: aspeed: Add sysfs controls for flash backend selection
arm: dts: aspeed: Add eSPI node for AST2600

.../bindings/soc/aspeed/aspeed,ast2600-espi.yaml | 74 +++
arch/arm/boot/dts/aspeed/aspeed-g6.dtsi | 11 +
drivers/soc/aspeed/Kconfig | 7 +
drivers/soc/aspeed/Makefile | 1 +
drivers/soc/aspeed/espi/Makefile | 1 +
drivers/soc/aspeed/espi/aspeed-espi-comm.h | 62 +++
drivers/soc/aspeed/espi/aspeed-espi.c | 618 +++++++++++++++++++++
drivers/soc/aspeed/espi/aspeed-espi.h | 63 +++
drivers/soc/aspeed/espi/ast2600-espi.c | 304 ++++++++++
drivers/soc/aspeed/espi/ast2600-espi.h | 302 ++++++++++
drivers/soc/aspeed/espi/espi_storage.c | 322 +++++++++++
drivers/soc/aspeed/espi/espi_storage.h | 32 ++
12 files changed, 1797 insertions(+)
---
base-commit: 0257f64bdac7fdca30fa3cae0df8b9ecbec7733a
change-id: 20260313-upstream_espi-d9fea66d1772

Best regards,
--
aspeedyh <yh_chung@aspeedtech.com>