From: Baruch Siach <baruch@tkos.co.il>
To: Dave Stevenson <dave.stevenson@raspberrypi.org>,
Eric Anholt <eric@anholt.net>,
Stefan Wahren <stefan.wahren@i2se.com>,
Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org, linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Michael Zoran <mzoran@crowfest.net>,
Baruch Siach <baruch@tkos.co.il>
Subject: [PATCH v2 0/4] gpio: driver for the RPi3 GPIO expander
Date: Thu, 11 Jan 2018 21:44:23 +0200 [thread overview]
Message-ID: <cover.1515698418.git.baruch@tkos.co.il> (raw)
The Raspberry Pi 3 has a GPIO expander that controls, among others, the
activity LED, and the camera connector GPIOs. The GPIO expander on an I2C bus
that is not directly controlled from the ARM core. The VC4 firmware controls
the I2C bus, and allows the ARM core to set/get GPIO settings over its mailbox
interface.
This series adds support for the RPi3 expander.
The driver is ported from the downstream kernel at
https://github.com/raspberrypi/linux/, branch rpi-4.9.y.
Changes in v2:
* Driver renamed to gpio-raspberrypi-exp
* Compatible string renamed to "raspberrypi,firmware-gpio"
* Firmware error check
* Smaller tweaks listed in individual patches
Baruch Siach (3):
ARM: bcm2835: sync firmware properties with downstream
dt-bindings: gpio: add raspberry pi GPIO expander binding
ARM: dts: bcm2837-rpi-3-b: add GPIO expander
Dave Stevenson (1):
gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox
service
.../bindings/gpio/raspberrypi,firmware-gpio.txt | 24 ++
arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 10 +
drivers/gpio/Kconfig | 9 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-raspberrypi-exp.c | 258 +++++++++++++++++++++
include/soc/bcm2835/raspberrypi-firmware.h | 18 ++
6 files changed, 320 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/raspberrypi,firmware-gpio.txt
create mode 100644 drivers/gpio/gpio-raspberrypi-exp.c
--
2.15.1
next reply other threads:[~2018-01-11 19:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-11 19:44 Baruch Siach [this message]
[not found] ` <cover.1515698418.git.baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>
2018-01-11 19:44 ` [PATCH v2 1/4] ARM: bcm2835: sync firmware properties with downstream Baruch Siach
2018-01-13 9:57 ` Stefan Wahren
[not found] ` <1991337128.42939.1515837465503-7tX72C7vayboQLBSYMtkGA@public.gmane.org>
2018-01-16 9:57 ` Linus Walleij
[not found] ` <CACRpkdZ_g3-jR-7pOnS9MwpHprfEz8acB9SWcMLyoOVcB0iLvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-16 10:49 ` Baruch Siach
2018-01-16 12:01 ` Stefan Wahren
2018-01-18 20:50 ` Eric Anholt
2018-01-11 19:44 ` [PATCH v2 2/4] dt-bindings: gpio: add raspberry pi GPIO expander binding Baruch Siach
2018-01-13 10:06 ` Stefan Wahren
2018-01-11 19:44 ` [PATCH v2 3/4] gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service Baruch Siach
[not found] ` <35b07d1aae959c357d671f5530311320d0f10cc8.1515698418.git.baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>
2018-01-13 10:33 ` Stefan Wahren
2018-01-13 14:49 ` Peter Robinson
2018-01-14 6:08 ` Baruch Siach
[not found] ` <20180114060840.ychhndc7ukulrbpe-MwjkAAnuF3khR1HGirfZ1z4kX+cae0hd@public.gmane.org>
2018-01-14 10:42 ` Stefan Wahren
2018-01-11 19:44 ` [PATCH v2 4/4] ARM: dts: bcm2837-rpi-3-b: add GPIO expander Baruch Siach
[not found] ` <1cb81e3d7a1b1f7ccf374952fa7e8d2147c186fb.1515698418.git.baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>
2018-01-13 10:44 ` Stefan Wahren
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