linux-kernel - [PATCH 0/3] gpio: siul2-s32g2: add initial GPIO driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240826084214.2368673-1-andrei.stefanescu@oss.nxp.com>
Date: Mon, 26 Aug 2024 11:42:07 +0300
From: Andrei Stefanescu <andrei.stefanescu@....nxp.com>
To: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chester Lin <chester62515@...il.com>,
	Matthias Brugger <mbrugger@...e.com>,
	Ghennadi Procopciuc <Ghennadi.Procopciuc@....com>,
	Larisa Grigore <larisa.grigore@....com>
Cc: linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	NXP S32 Linux Team <s32@....com>,
	Andrei Stefanescu <andrei.stefanescu@....nxp.com>
Subject: [PATCH 0/3] gpio: siul2-s32g2: add initial GPIO driver

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