linux-kernel - [patch 2.6.24-rc6-mm 0/9] updated gpiolib patchset

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Date:	Fri, 28 Dec 2007 19:52:47 -0800
From:	David Brownell <david-b@...bell.net>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Cc:	Jean Delvare <khali@...ux-fr.org>,
	eric miao <eric.y.miao@...il.com>,
	Haavard Skinnemoen <hskinnemoen@...el.com>
Subject: [patch 2.6.24-rc6-mm 0/9] updated gpiolib patchset

This patchset is intended to replace the ones currently in the MM tree:

	generic-gpio-gpio_chip-support.patch
	generic-gpio-gpio_chip-support-fix.patch
	generic-gpio-gpio_chip-support-gpiolib-locking-simplified.patch
	avr32-uses-gpio_chip.patch
	mcp23s08-spi-gpio-expander.patch
	mcp23s08-spi-gpio-expander-checkpatch-fixes.patch
	arm-pxa-gpiolib-support.patch
	arm-pxa-gpiolib-support-make-pxa_gpio_chip-static.patch

Changes since the version in mm include:  merging the various fixlets;
adding drivers for two I2C based GPIO expanders; and (the main reason
for replacement patches vs incremental ones) moving all non-platform
code into the new drivers/gpio directory.  Also, it now uses a new
internal "struct gpio_desc" abstraction -- somewhat visible to the
GPIO providers since ARCH_GPIOS_PER_CHIP is now gone.  All those
changes were posted previously.

Patches in this set are:

	- Add empty drivers/gpio directory and kconfig/kbuild support.
          Before this kicks in, platform support is needed.

	- Core gpiolib support.  Merges various updates as previously
	  discussed, notably simpler locking, the gpio_desc stuff (from
	  Eric Miao); and moving this from "lib" to "drivers/gpio".

	- Documentation/gpio.txt updates.

	- AVR32 platform support (at32ap)

	- PXA platform support (from Philipp Zabel, essentially unchanged)

	- PCF 857x I2C GPIO expander support ... a pretty widely used
	  family of "quasi-bidirectional" GPIOs (8 or 16 bits, many speeds)

	- MCP 23S08 SPI GPIO expander support ... with more traditional
	  push/pull outputs and hi-Z inputs

	- PCA 9539 I2C GPIO expander support ... a sixteen bit expander
	  using push/pull outputs etc (from Eric Miao)

	- Deprecate the older (unused) PCA9539 driver (from Eric Miao)

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