[PATCH 0/3] gpio: siul2-s32g2: add initial GPIO driver
From: Andrei Stefanescu
Date: Mon Aug 26 2024 - 04:43:03 EST
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.
Andrei Stefanescu (3):
dt-bindings: gpio: add schema for NXP S32G2/S32G3 SoCs
drivers: gpio: siul2-s32g2: add NXP S32G2/S32G3 SoCs support
MAINTAINERS: add MAINTAINER for S32G2 SIUL2 GPIO driver
.../bindings/gpio/nxp,gpio-siul2-s32g2.yaml | 134 ++++
MAINTAINERS | 2 +
drivers/gpio/Kconfig | 8 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-siul2-s32g2.c | 607 ++++++++++++++++++
5 files changed, 752 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/nxp,gpio-siul2-s32g2.yaml
create mode 100644 drivers/gpio/gpio-siul2-s32g2.c
--
2.45.2