This patch series adds device tree support for generic memory-mapped GPIOs. The GPIO library already allows drivers and architecture support code to reuse generic code for managing a GPIO chip. Currently, a developer has to create a platform device "basic-mmio-gpio" and attach a bgpio_pdata platform data structure to make use of it. However, for architectures which rely on the device tree to enumerate devices, creating custom platform devices is another extra step that can be avoided by having direct support via a device tree binding. I initially came across this patch [0] from Álvaro Fernández Rojas, while looking for an easy way to add support for the GPIO of my WD MyBook Live [1] (APM82181 - ppc464). This generic approach patch allowed me to easily get the GPIO (and the connected LEDs, buttons, gpiohogs, etc.) up and running. Even tought, Mr. Fernandez initially developed it for his work on the brcm63xx [2]. [0] <https://patchwork.ozlabs.org/patch/422121/> [1] <https://github.com/chunkeey/MBL-openwrt> [2] <https://wiki.openwrt.org/doc/hardware/soc/soc.broadcom.bcm63xx> Currently, the device tree parses for the integrated drivers (gpio-clps711x, gpio-ge, gpio-moxart and gpio-ts4800) are still residing in their original driver .c file. This way, these drivers don't clutter the gpio-generic.c with their own hardware definitions and MODULE_* statements. I hoped this would make the transition from the _probe to the parser less painless but the diff is retty much unreadable. So the next series will consolidate them into gpio-generic.c and then I can drop the gpio-generic -> gpio-mmio change. I think this is now mostly a matter of how to organize things and why not try it just once just so it was tested. changelog: v3 -> v4: - renamed gpio-generic.c to gpio-mmio.c (The gpio-generic only contains a generic mmio driver, this confuses and angers people!) - changed compat. string to "linux,gpio-mmio" - integrated Cirrus clps711x driver - integrated GE FGPA gpio-ge driver - integrated MOXA ART GPIO driver - integrated TS4800 gpio driver - reshuffled patches, reworded commits, fixed spelling errors, etc. Thanks! (Please keep me in the CC) --- Christian Lamparter (6): gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case gpio: rename gpio-generic.c into gpio-mmio.c gpio: clps711x: integrate cirrus clps711x into gpio-mmio gpio: ge: integrate GE's FPGA GPIO into gpio-mmio gpio: moxart: integrate MOXA ART GPIO driver into gpio-mmio gpio: ts4800: integrate TS4800 into gpio-mmio Álvaro Fernández Rojas (2): gpio: generic: add DT support for generic memory-mapped GPIOs gpio: dt-bindings: add gpio-mmio bindings .../devicetree/bindings/gpio/gpio-mmio.txt | 73 +++++++++++++++ drivers/gpio/Kconfig | 57 ++++++------ drivers/gpio/Makefile | 11 ++- drivers/gpio/gpio-clps711x.c | 84 ++++++----------- drivers/gpio/gpio-ge.c | 101 ++++++--------------- drivers/gpio/gpio-mmio-compat.h | 65 +++++++++++++ drivers/gpio/{gpio-generic.c => gpio-mmio.c} | 101 ++++++++++++++++++++- drivers/gpio/gpio-moxart.c | 81 +++++------------ drivers/gpio/gpio-ts4800.c | 76 +++++----------- 9 files changed, 376 insertions(+), 273 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-mmio.txt create mode 100644 drivers/gpio/gpio-mmio-compat.h rename drivers/gpio/{gpio-generic.c => gpio-mmio.c} (86%) -- 2.8.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
