Initially each pin was declared in "include/dt-bindings/stm32<SOC>-pinfunc.h" and each definition contained SOC names (ex: STM32F429_PA9_FUNC_USART1_TX). Since this approach was approved, the number of supported MCU has increased (STM32F429/STM32F469/STM32f746/STM32H743). To avoid to add a new file in "include/dt-bindings" each time a new STM32 SOC arrives I propose a new approach which consist to use a macro to define pin muxing in device tree. All STM32 DT will use the common macro to define pinmux. Furthermore, it will make maintenance and integration of new SOC easier. I made only one patch to avoid dependencies. Let me know if you prefer that I split it. To check that patch generate same dtb than befrore I used dtc binary to (re)generate dts files (before and after apply the series). Example on stm32f469-disco: ./scripts/dtc/dtc -I dtb -O dts -o stm32f469-disco-after.dts stm32f469-disco-after.dtb ./scripts/dtc/dtc -I dtb -O dts -o stm32f469-disco-before.dts stm32f469-disco-before.dtb Then diff -u stm32f469-disco-before.dts stm32f469-disco-after.dts Changes since v3: -Rewrite documentation part -Simplify macro Changes since v2: -Drop RFC tag -Add reviewers -Enhance modifications to all STM32 (F4/F7/H7) Changes since v1: -According to Vikas Manocha review, use generic macro to define port. Regards Alex Alexandre Torgue (1): ARM: dts: stm32: change pinctrl bindings definition .../bindings/pinctrl/st,stm32-pinctrl.txt | 22 +- arch/arm/boot/dts/stm32f429.dtsi | 176 +-- arch/arm/boot/dts/stm32f746.dtsi | 10 +- arch/arm/boot/dts/stm32h743-pinctrl.dtsi | 10 +- include/dt-bindings/pinctrl/stm32-pinfunc.h | 30 + include/dt-bindings/pinctrl/stm32f429-pinfunc.h | 1239 --------------- include/dt-bindings/pinctrl/stm32f746-pinfunc.h | 1324 ---------------- include/dt-bindings/pinctrl/stm32h7-pinfunc.h | 1612 -------------------- 8 files changed, 148 insertions(+), 4275 deletions(-) create mode 100644 include/dt-bindings/pinctrl/stm32-pinfunc.h delete mode 100644 include/dt-bindings/pinctrl/stm32f429-pinfunc.h delete mode 100644 include/dt-bindings/pinctrl/stm32f746-pinfunc.h delete mode 100644 include/dt-bindings/pinctrl/stm32h7-pinfunc.h -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
