[PATCH 0/7] gpio: siul2-s32g2: add initial GPIO driver

[Khristine Andreea Barbulescu]

On 5/4/2026 3:41 PM, Khristine Andreea Barbulescu wrote:
> This patch series adds support for basic GPIO
> operations(set, get, direction_output/input, set_config).
> 
> There are two SIUL2 hardware modules: SIUL2_0 and SIUL2_1.
> However, this driver exports both as a single GPIO driver.
> This is because the interrupt registers are located only
> in SIUL2_1, even for GPIOs that are part of SIUL2_0.
> 
> There are two gaps in the GPIO ranges:
> - 102-111(inclusive) are invalid
> - 123-143(inclusive) are invalid
> 
> Writing and reading GPIO values is done via the PGPDO/PGPDI
> registers(Parallel GPIO Pad Data Output/Input) which are
> 16 bit registers, each bit corresponding to a GPIO.
> 
> Note that the PGPDO order is similar to a big-endian grouping
> of two registers:
> PGPDO1, PGPDO0, PGPDO3, PGPDO2, PGPDO5, PGPDO4, gap, PGPDO6.
> 
> v9 -> v8
> - remove the SIUL2 syscon child nodes from the
> device tree and DT bindings
> - remove syscon child handling from the MFD
> and pinctrl drivers
> - remove the MFD driver and use a single monolithic
> pinctrl/gpio/irqchip driver
> - add a new compatible for the pinctrl+gpio binding
> while keeping the previous compatible for the legacy
> pinctrl-only binding
> - update bindings to include the PGPDO/PGPDI and
> IRQ register regions in the DT node for the
> pinctrl/gpio/irq binding
> - add IRQ-related entries in the bindings to
> document the intended hierarchy; IRQ support
> itself will be added in a future patch series
> - update DT nodes to match the new hierarchy and
> compatible scheme
> - fix dtb warnings
> - reorder commits: bug fixes, API changes, DT bindings,
> driver implementation, DTS changes
> - split commits further to separate minor
> style-only adjustments
> 
> v8 -> v7
> - remove all ': true' lines from properties in dt bindings
> - remove NVMEM MFD cell from SIUL2 in dtsi
> - remove NVMEM driver and configs
> - expose SoC information via syscon cells SIUL2_0
> and SIUL2_1 in MFD driver
> - add SIUL2_0 and SIUL2_1 syscon nodes in dtsi
> - add patternProperties for "^siul2_[0-1]$" for syscon nodes
> - update example to include syscon cells with proper format
> - remove `reg` property from pinctrl node in dt binding
> - update Kconfig help text to reflect new syscon structure
> instead of NVMEM for SoC information
> - squash deprecated SIUL2 pinctrl binding with new MFD binding
> - dropped "nxp,s32g3-siul2" from MFD driver match table
> - fixed commit messages
> - fixed dtb warnings
> 
> v7 -> v6
> - fixed MAINTAINERS wrong file path
> - add unevaluatedProperties, change siul2 node name, remove
>   jtag_pins label in the device tree schema
> - change compatible definition in schema
> - change node name in dtsi
> - mentioned binding deprecation in commit messages
> - split mfd cell conversion commit in two: one for the
>   previous refactoring, one for the mfd cell conversion
> - removed Acked-by: Linus Walleij from commit:
>   "pinctrl: s32: convert the driver into an mfd cell"
>   because of changes to that commit
> - deprecate the nxp,s32g2-siul2-pinctrl binding
> - add NVMEM MFD cell for SIUL2
> - made the GPIO driver not export invalid pins
>   (there are some gaps 102-111, 123-143)
> - removed the need for gpio-reserved-ranges
> - force initialized pinctrl_desc->num_custom_params to 0
> 
> v6 -> v5
> - removed description for reg in the dt-bindings and added
>   maxItems
> - dropped label for example in the dt-bindings
> - simplified the example in the dt-bindings
> - changed dt-bindings filename to nxp,s32g2-siul2.yaml
> - changed title in the dt-bindings
> - dropped minItmes from gpio-ranges/gpio-reserved-ranges
>   and added maxItems to gpio-reserved-ranges
> - added required block for -grp[0-9]$ nodes
> - switch to using "" as quotes
> - kernel test robot: fixed frame sizes, added description
>   for reg_name, fixed typo in gpio_configs_lock, removed
>   uninitialized ret variable usage
> - ordered includes in nxp-siul2.c, switched to dev-err-probe
>   added a mention that other commits will add nvmem functionality
>   to the mfd driver
> - switched spin_lock_irqsave to scoped_guard statement
> - switched dev_err to dev_err_probe in pinctrl-s32cc in places
>   reached during the probing part
> 
> v5 -> v4
> - fixed di_div error
> - fixed dt-bindings error
> - added Co-developed-by tags
> - added new MFD driver nxp-siul2.c
> - made the old pinctrl driver an MFD cell
> - added the GPIO driver in the existing SIUL2 pinctrl one
> - Switch from "devm_pinctrl_register" to
>   "devm_pinctrl_register_and_init"
> 
> v4 -> v3
> - removed useless parentheses
> - added S32G3 fallback compatible
> - fixed comment alignment
> - fixed dt-bindings license
> - fixed modpost: "__udivdi3"
> - moved MAINTAINERS entry to have the new GPIO driver
>   together with other files related to S32G
> 
> v3 -> v2
> - fix dt-bindings schema id
> - add maxItems to gpio-ranges
> - removed gpio label from dt-bindings example
> - added changelog for the MAINTAINERS commit and
>   added separate entry for the SIUL2 GPIO driver
> - added guard(raw_spinlock_irqsave) in
>   'siul2_gpio_set_direction'
> - updated the description for
>   'devm_platform_get_and_ioremap_resource_byname'
> 
> v2 -> v1
> dt-bindings:
> - changed filename to match compatible
> - fixed commit messages
> - removed dt-bindings unnecessary properties descriptions
> - added minItems for the interrupts property
> driver:
> - added depends on ARCH_S32 || COMPILE_TEST to Kconfig
> - added select REGMAP_MMIO to Kconfig
> - remove unnecessary include
> - add of_node_put after `siul2_get_gpio_pinspec`
> - removed inline from function definitions
> - removed match data and moved the previous platdata
>   definition to the top of the file to be visible
> - replace bitmap_set/clear with __clear_bit/set_bit
>   and devm_bitmap_zalloc with devm_kzalloc
> - switched to gpiochip_generic_request/free/config
> - fixed dev_err format for size_t reported by
>   kernel test robot
> - add platform_get_and_ioremap_resource_byname wrapper
> Andrei Stefanescu (2):
>   pinctrl: s32cc: change to "devm_pinctrl_register_and_init"
>   pinctrl: s32cc: implement GPIO functionality
> 
> Khristine Andreea Barbulescu (5):
>   pinctrl: s32cc: use dev_err_probe() and improve error messages
>   pinctrl: s32cc: add/fix some comments
>   pinctrl: s32cc: remove inline specifiers
>   dt-bindings: pinctrl: s32g2-siul2: describe GPIO and EIRQ resources
>   arm64: dts: s32g: describe GPIO and EIRQ resources in SIUL2 pinctrl
>     node
> 
>  .../pinctrl/nxp,s32g2-siul2-pinctrl.yaml      | 107 ++-
>  arch/arm64/boot/dts/freescale/s32g2.dtsi      |  26 +-
>  arch/arm64/boot/dts/freescale/s32g3.dtsi      |  26 +-
>  drivers/pinctrl/nxp/pinctrl-s32.h             |  15 +-
>  drivers/pinctrl/nxp/pinctrl-s32cc.c           | 646 ++++++++++++++----
>  drivers/pinctrl/nxp/pinctrl-s32g2.c           |  25 +-
>  6 files changed, 707 insertions(+), 138 deletions(-)
> 

Hello,
 
Please disregard the submission of this patch series.

I have resent it because this version did not
have the "v9" tag appended in the patch subjects.

Regards,
Khristine