[PATCH 0/3] GPIO support for BRCMSTB

Gregory Fong
2015-05-06T08:38:54Z

This patchset adds support for the GPIO controller (UPG GIO) used on Broadcom's
various BRCMSTB SoCs (BCM7XXX and others). It uses the "basic-mmio-gpio"
interface to try to reduce duplication of the base logic.

There is only one IRQ for each GIO IP block (i.e. several register banks share
an IRQ). After briefly looking into the generic IRQ chip implementation, it
seemed like in this case that using it would result in the driver being more
complex than necessary because AFAICT it expects a 1:1 mapping of
irq_chip_generic to gpio_chip. It seemed like less of a pain to have a single
irq_chip since we have a single IRQ for all register banks (multiple
gpio_chips). I might be missing something, maybe using a shared IRQ across
multiple irq_chips is easier than I think? Suggestions welcome.

For all existing hardware, this block hooked up to the BCM7120 L2 IRQ
controller and so will require CONFIG_BCM7120_L2_IRQ=y.

Gregory Fong (3):
dt-bindings: add brcmstb-gpio GPIO binding
gpio: Add GPIO support for Broadcom STB SoCs
gpio: brcmstb: Add interrupt support

.../devicetree/bindings/gpio/brcm,brcmstb-gpio.txt | 65 +++
MAINTAINERS | 7 +
arch/arm/mach-bcm/Kconfig | 1 +
drivers/gpio/Kconfig | 9 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-brcmstb.c | 492 ++++++++++++++++++++
6 files changed, 575 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
create mode 100644 drivers/gpio/gpio-brcmstb.c

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1.7.9.5