Here's v2, which incorporates the feedback from Maxime and ChenYu into a more complete and less intrusive version.
The most elegant solution to our problem with pinctrl & gpio, which will also work equally well for ccu and reset, is to have the device model bind multiple drivers to a single node: for this reason, one patch of the series touches the device-model core.
To provide a bit more context, I've also include the change showing how this is enabled in our defconfig (i.e. a diff against our defconfig, even though the defconfig has not been submitted yet).
Changes in v2: * two variants to reuse the sunxi_gpio layer: - create a matching soc_data for sunxi_gpio and rebind - have the device-model do this for us * got rid of the gpio-banks and gpiobridge drivers
Philipp Tomsich (6): sunxi: add pinctrl (UCLASS_PINCTRL) support for sunxi dm: core: Allow multiple drivers to bind for a single node sunxi: CONFIG_DM_ALLOW_MULTIPLE_DRIVERS for gpio/pinctrl binding defconfig: lynx: enable CONFIG_DM_ALLOW_MULTIPLE_DRIVERS sun50i: dts: add r_pio node and pinconfig entries into r_pio and pio sun50i: dts: update DTS to avoid warnings
arch/arm/dts/sun50i-a64.dtsi | 62 ++- arch/arm/include/asm/arch-sunxi/gpio-internal.h | 19 + configs/lynx_defconfig | 1 + .../pinctrl/allwinner,pinctrl.txt | 65 +++ drivers/core/Kconfig | 14 + drivers/core/lists.c | 12 +- drivers/gpio/sunxi_gpio.c | 15 +- drivers/pinctrl/Kconfig | 10 + drivers/pinctrl/Makefile | 2 + drivers/pinctrl/sunxi/Makefile | 10 + drivers/pinctrl/sunxi/pinctrl-sun50i-a64-r.c | 92 ++++ drivers/pinctrl/sunxi/pinctrl-sun50i-a64.c | 577 +++++++++++++++++++++ drivers/pinctrl/sunxi/pinctrl-sunxi.c | 321 ++++++++++++ drivers/pinctrl/sunxi/pinctrl-sunxi.h | 311 +++++++++++ 14 files changed, 1479 insertions(+), 32 deletions(-) create mode 100644 arch/arm/include/asm/arch-sunxi/gpio-internal.h create mode 100644 doc/device-tree-bindings/pinctrl/allwinner,pinctrl.txt create mode 100644 drivers/pinctrl/sunxi/Makefile create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun50i-a64-r.c create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun50i-a64.c create mode 100644 drivers/pinctrl/sunxi/pinctrl-sunxi.c create mode 100644 drivers/pinctrl/sunxi/pinctrl-sunxi.h