[PATCH RFC 00/11 v4] gpio: Add block GPIO

From: Roland Stigge
Date: Mon Oct 15 2012 - 19:36:17 EST


This set of patches adds:

* Block GPIO API to gpiolib
* Sysfs support for GPIO API, to provide userland access
* Devicetree support to instantiate GPIO blocks via DT
* Example implementations in several gpio drivers since they need
special accessor functions for block wise GPIO access

Signed-off-by: Roland Stigge <stigge@xxxxxxxxx>
--

Changes since v3:
* Added driver support for pca953x, em, pl061, max732x, pcf857x
* Coding style improvements
* Fixed krealloc memory leak in error case
* sysfs: values in hex
* Register blocks in a list
* Narrowing lock scope
* Use S_IWUSR and S_IRUGO instead of direct octal values
* Use for_each_set_bit()
* Change from unsigned to unsigned long for masks and values

Changes since v2:
* Added sysfs support
* Added devicetree support
* Added support for lpc32xx, generic
* Added functions for GPIO block registration
* Added more error checking
* Bit remapping bugfix

Changes since v1:
* API change to 32/64 bit word, bit masks

Thanks to Ryan Mallon, Linus Walleij, Stijn Devriendt, Jean-Christophe
Plagniol-Villard and Mark Brown for reviewing!

Roland Stigge (11):
gpio: Add a block GPIO API to gpiolib
gpio: Add sysfs support to block GPIO API
gpio: Add device tree support to block GPIO API
gpio-max730x: Add block GPIO API
gpio-lpc32xx: Add block GPIO API
gpio-generic: Add block GPIO API
gpio-pca953x: Add block GPIO API
gpio-em: Add block GPIO API
gpio-pl061: Add block GPIO API
gpio-max732x: Add block GPIO API
gpio-pcf857x: Add block GPIO API

Documentation/ABI/testing/sysfs-gpio | 6
Documentation/devicetree/bindings/gpio/gpio-block.txt | 36 +
Documentation/gpio.txt | 45 +
drivers/gpio/Makefile | 1
drivers/gpio/gpio-em.c | 23
drivers/gpio/gpio-generic.c | 56 ++
drivers/gpio/gpio-lpc32xx.c | 82 +++
drivers/gpio/gpio-max730x.c | 61 ++
drivers/gpio/gpio-max732x.c | 59 ++
drivers/gpio/gpio-pca953x.c | 64 ++
drivers/gpio/gpio-pcf857x.c | 24 +
drivers/gpio/gpio-pl061.c | 17
drivers/gpio/gpioblock-of.c | 84 +++
drivers/gpio/gpiolib.c | 428 ++++++++++++++++++
include/asm-generic/gpio.h | 26 +
include/linux/gpio.h | 87 +++
16 files changed, 1098 insertions(+), 1 deletion(-)
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