Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

2nd round of GPIO changes for v3.3 merge window

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  GPIO: sa1100: implement proper gpiolib gpio_to_irq conversion
  gpio: pl061: remove combined interrupt
  gpio: pl061: convert to use generic irq chip
  GPIO: add bindings for managed devices
  ARM: realview: convert pl061 no irq to 0 instead of -1
  gpio: pl061: convert to use 0 for no irq
  gpio: pl061: use chained_irq_* functions in irq handler
  GPIO/pl061: Add suspend resume capability
  drivers/gpio/gpio-tegra.c: use devm_request_and_ioremap

arch/arm/mach-realview/realview_eb.c

@@ -117,17 +117,14 @@ static void __init realview_eb_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {

arch/arm/mach-realview/realview_pb1176.c

@@ -113,17 +113,14 @@ static void __init realview_pb1176_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {

arch/arm/mach-realview/realview_pb11mp.c

@@ -112,17 +112,14 @@ static void __init realview_pb11mp_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {

arch/arm/mach-realview/realview_pba8.c

@@ -102,17 +102,14 @@ static void __init realview_pba8_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {

arch/arm/mach-realview/realview_pbx.c

@@ -124,17 +124,14 @@ static void __init realview_pbx_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {

arch/arm/mach-sa1100/include/mach/gpio.h

@@ -51,7 +51,4 @@ static inline void gpio_set_value(unsigned gpio, int value)
 
 #define gpio_cansleep	__gpio_cansleep
 
-#define gpio_to_irq(gpio)	((gpio < 11) ? (IRQ_GPIO0 + gpio) : \
-					(IRQ_GPIO11 - 11 + gpio))
-
 #endif

drivers/gpio/Kconfig

@@ -138,6 +138,7 @@ config GPIO_MXS
 config GPIO_PL061
 	bool "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
+	select GENERIC_IRQ_CHIP
 	help
 	  Say yes here to support the PrimeCell PL061 GPIO device
 

drivers/gpio/Makefile

@@ -2,7 +2,7 @@
 
 ccflags-$(CONFIG_DEBUG_GPIO)	+= -DDEBUG
 
-obj-$(CONFIG_GPIOLIB)		+= gpiolib.o
+obj-$(CONFIG_GPIOLIB)		+= gpiolib.o devres.o
 
 # Device drivers. Generally keep list sorted alphabetically
 obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o

drivers/gpio/devres.c

@@ -0,0 +1,90 @@
+/*
+ * drivers/gpio/devres.c - managed gpio resources
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This file is based on kernel/irq/devres.c
+ *
+ * Copyright (c) 2011 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/device.h>
+#include <linux/gfp.h>
+
+static void devm_gpio_release(struct device *dev, void *res)
+{
+	unsigned *gpio = res;
+
+	gpio_free(*gpio);
+}
+
+static int devm_gpio_match(struct device *dev, void *res, void *data)
+{
+	unsigned *this = res, *gpio = data;
+
+	return *this == *gpio;
+}
+
+/**
+ *      devm_gpio_request - request a gpio for a managed device
+ *      @dev: device to request the gpio for
+ *      @gpio: gpio to allocate
+ *      @label: the name of the requested gpio
+ *
+ *      Except for the extra @dev argument, this function takes the
+ *      same arguments and performs the same function as
+ *      gpio_request().  GPIOs requested with this function will be
+ *      automatically freed on driver detach.
+ *
+ *      If an GPIO allocated with this function needs to be freed
+ *      separately, devm_gpio_free() must be used.
+ */
+
+int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
+{
+	unsigned *dr;
+	int rc;
+
+	dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
+	if (!dr)
+		return -ENOMEM;
+
+	rc = gpio_request(gpio, label);
+	if (rc) {
+		devres_free(dr);
+		return rc;
+	}
+
+	*dr = gpio;
+	devres_add(dev, dr);
+
+	return 0;
+}
+EXPORT_SYMBOL(devm_gpio_request);
+
+/**
+ *      devm_gpio_free - free an interrupt
+ *      @dev: device to free gpio for
+ *      @gpio: gpio to free
+ *
+ *      Except for the extra @dev argument, this function takes the
+ *      same arguments and performs the same function as gpio_free().
+ *      This function instead of gpio_free() should be used to manually
+ *      free GPIOs allocated with devm_gpio_request().
+ */
+void devm_gpio_free(struct device *dev, unsigned int gpio)
+{
+
+	WARN_ON(devres_destroy(dev, devm_gpio_release, devm_gpio_match,
+		&gpio));
+	gpio_free(gpio);
+}
+EXPORT_SYMBOL(devm_gpio_free);