[PATCH v2 0/5] Add GPIO support for MStar/SigmaStar ARMv7

From: Daniel Palmer
Date: Mon Oct 19 2020 - 10:10:18 EST


At the moment the MStar/SigmaStar support is only really
capable of shell from an initramfs and not much else.

Most of the interesting drivers are blocked on clock and pinctrl
drivers and those are going to take me a little while to get cleaned
up.

Clock and pinctrl aren't needed for basic GPIO to work (all pins
start off as GPIOs..) and it makes it possible to actually do something
so this series adds everything that is needed for the main GPIO
block in these chips.

Changes since v1:

- Moves the binding header commit before the yaml commit

- Fixes the license on the binding header to include BSD-2-Clause

- The driver has been reworked to use the gpiolib irqchip functionality
as suggested by Linus[0]. I think I got this right. The gpio controller
doesn't actually do anything with interrupts itself.. It just happens
to have 4 lines that are also wired to lines on one of the interrupt
controllers.

- Now that the driver is an interrupt controller in it's own right for
the gpio lines that have associated interrupts the binding description
has been updated to add the interrupt-controller bits and remove the
description of the interrupt-names that described how the interrupts
used to be passed in.

Daniel Palmer (5):
dt-bindings: gpio: Add a binding header for the MSC313 GPIO driver
dt-bindings: gpio: Binding for MStar MSC313 GPIO controller
gpio: msc313: MStar MSC313 GPIO driver
ARM: mstar: Add gpio controller to MStar base dtsi
ARM: mstar: Fill in GPIO controller properties for infinity

.../bindings/gpio/mstar,msc313-gpio.yaml | 61 +++
MAINTAINERS | 3 +
arch/arm/boot/dts/mstar-infinity.dtsi | 7 +
arch/arm/boot/dts/mstar-v7.dtsi | 10 +
drivers/gpio/Kconfig | 9 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-msc313.c | 406 ++++++++++++++++++
include/dt-bindings/gpio/msc313-gpio.h | 95 ++++
8 files changed, 592 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/mstar,msc313-gpio.yaml
create mode 100644 drivers/gpio/gpio-msc313.c
create mode 100644 include/dt-bindings/gpio/msc313-gpio.h

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2.28.0