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 These will be excluded via the `gpio-reserved-ranges` property. 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. I have other patches for this driver: - interrupt support - power management callbacks which I plan to upstream after this series gets merged in order to simplify the review process. 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 (4): drivers: provide devm_platform_get_and_ioremap_resource_byname() dt-bindings: gpio: add support for NXP S32G2/S32G3 SoCs gpio: siul2-s32g2: add NXP S32G2/S32G3 SoCs support MAINTAINERS: add MAINTAINER for S32G2 SIUL2 GPIO driver .../bindings/gpio/nxp,s32g2-siul2-gpio.yaml | 107 ++++ MAINTAINERS | 7 + drivers/base/platform.c | 27 + drivers/gpio/Kconfig | 10 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-siul2-s32g2.c | 576 ++++++++++++++++++ include/linux/platform_device.h | 13 + 7 files changed, 741 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/nxp,s32g2-siul2-gpio.yaml create mode 100644 drivers/gpio/gpio-siul2-s32g2.c -- 2.45.2
