Re: [PATCH v3 0/6] Introduce STM32 system bus

Gatien CHEVALLIER
2023-07-05T17:36:07Z

Hello all,

I'm abandoning this series for:
https://lore.kernel.org/lkml/20230705172759.1610753

Sorry for the noise.

Best regards,
Gatien

On 1/27/23 17:40, Gatien Chevallier wrote:
> Document STM32 System Bus. This bus is intended to control firewall
> access for the peripherals connected to it.
>
> For every peripheral, the bus checks the firewall registers to see
> if the peripheral is configured as non-secure. If the peripheral
> is configured as secure, the node is marked populated, so the
> device won't be probed.
>
> This is useful as a firewall configuration sanity check and avoid
> platform crashes in case peripherals are incorrectly configured.
>
> The STM32 System Bus implements the feature-domain-controller
> bindings. It is used by peripherals to reference a domain
> controller, in this case the firewall feature domain.
> The bus uses the ID referenced by the feature-domains property to
> know where to look in the firewall to get the security configuration
> for the peripheral. This allows a device tree description rather
> than a hardcoded peripheral table in the bus driver.
>
> On STM32MP13/15 platforms, the firewall bus is represented by the
> ETZPC node, which is responsible for the securing / MCU isolating
> the capable peripherals.
>
> STM32MP13/15 device trees are updated in this series to implement
> the bus. All peripherals that are securable or MCU isolation capable
> by the ETZPC are connected to the bus.
>
> Changes in V2:
> - Corrected YAMLS errors highlighted by Rob's robot
> - Re-ordered Signed-off-by tags in two patches
>
> Changes in V3:
> - Document feature-domains property in YAML documentation for
> concerned periperals under the System Bus
> - Fix STM32 System Bus YAML documentation
> - Remove STM32 System bus bindings that were currently used
> as helpers for device tree
> - Correct few errors in driver
> - Add missing peripherals under the System Bus that were in
> SoC variation device tree files
> - Fix node names
>
> Gatien Chevallier (5):
> dt-bindings: treewide: add feature-domains description in binding
> files
> dt-bindings: bus: add STM32 System Bus
> bus: stm32_sys_bus: add support for STM32MP15 and STM32MP13 system bus
> ARM: dts: stm32: add ETZPC as a system bus for STM32MP15x boards
> ARM: dts: stm32: add ETZPC as a system bus for STM32MP13x boards
>
> Oleksii Moisieiev (1):
> dt-bindings: Document common device controller bindings
>
> .../devicetree/bindings/bus/st,sys-bus.yaml | 127 +
> .../bindings/crypto/st,stm32-hash.yaml | 5 +
> .../devicetree/bindings/dma/st,stm32-dma.yaml | 5 +
> .../bindings/dma/st,stm32-dmamux.yaml | 5 +
> .../feature-domain-controller.yaml | 84 +
> .../devicetree/bindings/i2c/st,stm32-i2c.yaml | 5 +
> .../bindings/iio/adc/st,stm32-adc.yaml | 5 +
> .../bindings/iio/adc/st,stm32-dfsdm-adc.yaml | 5 +
> .../bindings/iio/dac/st,stm32-dac.yaml | 5 +
> .../bindings/media/st,stm32-cec.yaml | 5 +
> .../bindings/media/st,stm32-dcmi.yaml | 5 +
> .../memory-controllers/st,stm32-fmc2-ebi.yaml | 5 +
> .../bindings/mfd/st,stm32-lptimer.yaml | 5 +
> .../bindings/mfd/st,stm32-timers.yaml | 6 +
> .../devicetree/bindings/mmc/arm,pl18x.yaml | 5 +
> .../devicetree/bindings/net/stm32-dwmac.yaml | 5 +
> .../bindings/phy/phy-stm32-usbphyc.yaml | 5 +
> .../bindings/regulator/st,stm32-vrefbuf.yaml | 5 +
> .../devicetree/bindings/rng/st,stm32-rng.yaml | 5 +
> .../bindings/serial/st,stm32-uart.yaml | 5 +
> .../bindings/sound/st,stm32-i2s.yaml | 5 +
> .../bindings/sound/st,stm32-sai.yaml | 5 +
> .../bindings/sound/st,stm32-spdifrx.yaml | 5 +
> .../bindings/spi/st,stm32-qspi.yaml | 5 +
> .../devicetree/bindings/spi/st,stm32-spi.yaml | 5 +
> .../devicetree/bindings/usb/dwc2.yaml | 5 +
> MAINTAINERS | 6 +
> arch/arm/boot/dts/stm32mp131.dtsi | 407 +--
> arch/arm/boot/dts/stm32mp133.dtsi | 51 +-
> arch/arm/boot/dts/stm32mp13xc.dtsi | 19 +-
> arch/arm/boot/dts/stm32mp13xf.dtsi | 18 +-
> arch/arm/boot/dts/stm32mp151.dtsi | 2722 +++++++++--------
> arch/arm/boot/dts/stm32mp153.dtsi | 52 +-
> arch/arm/boot/dts/stm32mp15xc.dtsi | 19 +-
> drivers/bus/Kconfig | 9 +
> drivers/bus/Makefile | 1 +
> drivers/bus/stm32_sys_bus.c | 168 +
> 37 files changed, 2208 insertions(+), 1596 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/bus/st,sys-bus.yaml
> create mode 100644 Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml
> create mode 100644 drivers/bus/stm32_sys_bus.c
>