Merge tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO changes from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.18 development cycle:

   - Increase the default ARCH_NR_GPIO from 256 to 512.  This was done
     to avoid having a custom <asm/gpio.h> header for the x86
     architecture - GPIO is custom and complicated enough as it is
     already! We want to move to a radix to store the descriptors going
     forward, and finally get rid of this fixed array size altogether.

   - Endgame patching of the gpio_remove() semantics initiated by
     Abdoulaye Berthe.  It is not accepted by the system that the
     removal of a GPIO chip fails during eg reboot or shutdown, and
     therefore the return value has now painfully been refactored away.
     For special cases like GPIO expanders on a hot-pluggable bus like
     USB, we may later add some gpiochip_try_remove() call, but for the
     cases we have now, return values are moot.

   - Some incremental refactoring of the gpiolib core and ACPI GPIO
     library for more descriptor usage.

   - Refactor the chained IRQ handler set-up method to handle also
     threaded, nested interrupts and set up the parent IRQ correctly.
     Switch STMPE and TC3589x drivers to use this registration method.

   - Add a .irq_not_threaded flag to the struct gpio_chip, so that also
     GPIO expanders that block but are still not using threaded IRQ
     handlers.

   - New drivers for the ARM64 X-Gene SoC GPIO controller.

   - The syscon GPIO driver has been improved to handle the "DSP GPIO"
     found on the TI Keystone 2 SoC:s.

   - ADNP driver switched to use gpiolib irqchip helpers.

   - Refactor the DWAPB driver to support being instantiated from and
     MFD cell (platform device).

   - Incremental feature improvement in the Zynq, MCP23S08, DWAPB, OMAP,
     Xilinx and Crystalcove drivers.

   - Various minor fixes"

* tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (52 commits)
  gpio: pch: Build context save/restore only for PM
  pinctrl: abx500: get rid of unused variable
  gpio: ks8695: fix 'else should follow close brace '}''
  gpio: stmpe: add verbose debug code
  gpio: stmpe: fix up interrupt enable logic
  gpio: staticize xway_stp_init()
  gpio: handle also nested irqchips in the chained handler set-up
  gpio: set parent irq on chained handlers
  gpiolib: irqchip: use irq_find_mapping while removing irqchip
  gpio: crystalcove: support virtual GPIO
  pinctrl: bcm281xx: make Kconfig dependency more strict
  gpio: kona: enable only on BCM_MOBILE or for compile testing
  gpio, bcm-kona, LLVMLinux: Remove use of __initconst
  gpio: Fix ngpio in gpio-xilinx driver
  gpio: dwapb: fix pointer to integer cast
  gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard
  gpio: xgene: Remove unneeded forward declation for struct xgene_gpio
  gpio: xgene: Fix missing spin_lock_init()
  gpio: ks8695: fix switch case indentation
  gpiolib: add irq_not_threaded flag to gpio_chip
  ...

1 files changed, 3 insertions, 51 deletions

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index f9961eea212..e2da64abbcc 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -520,7 +520,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 	struct i2c_client *client = chip->client;
 	int ret, i, offset = 0;
 
-	if (irq_base != -1
+	if (client->irq && irq_base != -1
 			&& (id->driver_data & PCA_INT)) {
 
 		switch (chip->chip_type) {
@@ -586,50 +586,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 }
 #endif
 
-/*
- * Handlers for alternative sources of platform_data
- */
-#ifdef CONFIG_OF_GPIO
-/*
- * Translate OpenFirmware node properties into platform_data
- * WARNING: This is DEPRECATED and will be removed eventually!
- */
-static void
-pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
-{
-	struct device_node *node;
-	const __be32 *val;
-	int size;
-
-	*gpio_base = -1;
-
-	node = client->dev.of_node;
-	if (node == NULL)
-		return;
-
-	val = of_get_property(node, "linux,gpio-base", &size);
-	WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__);
-	if (val) {
-		if (size != sizeof(*val))
-			dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
-				 node->full_name);
-		else
-			*gpio_base = be32_to_cpup(val);
-	}
-
-	val = of_get_property(node, "polarity", NULL);
-	WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__);
-	if (val)
-		*invert = *val;
-}
-#else
-static void
-pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
-{
-	*gpio_base = -1;
-}
-#endif
-
 static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
 {
 	int ret;
@@ -704,12 +660,8 @@ static int pca953x_probe(struct i2c_client *client,
 		invert = pdata->invert;
 		chip->names = pdata->names;
 	} else {
-		pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
-#ifdef CONFIG_OF_GPIO
-		/* If I2C node has no interrupts property, disable GPIO interrupts */
-		if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL)
-			irq_base = -1;
-#endif
+		chip->gpio_start = -1;
+		irq_base = 0;
 	}
 
 	chip->client = client;