Merge tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "Here is the bulk of GPIO changes for the v4.4 development cycle.

  The only changes hitting outside drivers/gpio are in the pin control
  subsystem and these seem to have settled nicely in linux-next.

  Development mistakes and catfights are nicely documented in the
  reverts as you can see.  The outcome of the ABI fight is that we're
  working on a chardev ABI for GPIO now, where hope to show results for
  the v4.5 kernel.

  Summary of changes:

  GPIO core:
   - Define and handle flags for open drain/open collector and open
     source/open emitter, also know as "single-ended" configurations.
   - Generic request/free operations that handle calling out to the
     (optional) pin control backend.
   - Some refactoring related to an ABI change that did not happen, yet
     provide useful.
   - Added a real-time compliance checklist.  Many GPIO chips have
     irqchips, and need to think this over with the RT patches going
     upstream.
   - Restructure, fix and clean up Kconfig menus a bit.

  New drivers:
   - New driver for AMD Promony.
   - New driver for ACCES 104-IDIO-16, a port-mapped I/O card,
     ISA-style.  Very retro.

  Subdriver changes:
   - OMAP changes to handle real time requirements.
   - Handle trigger types for edge and level IRQs on PL061 properly.  As
     this hardware is very common it needs to set a proper example for
     others to follow.
   - Some container_of() cleanups.
   - Delete the unused MSM driver in favor of the driver that is
     embedded inside the pin control driver.
   - Cleanup of the ath79 GPIO driver used by many, many OpenWRT router
     targets.
   - A consolidated IT87xx driver replacing the earlier very specific
     IT8761e driver.
   - Handle the TI TCA9539 in the PCA953x driver.  Also handle ACPI
     devices in this subdriver.
   - Drop xilinx arch dependencies as these FPGAs seem to profilate over
     a few different architectures.  MIPS and ARM come to mind"

* tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (57 commits)
  gpio: fix up SPI submenu
  gpio: drop surplus I2C dependencies
  gpio: drop surplus X86 dependencies
  gpio: dt-bindings: document the official use of "ngpios"
  gpio: MAINTAINERS: Add an entry for the ATH79 GPIO driver
  gpio / ACPI: Allow shared GPIO event to be read via operation region
  gpio: group port-mapped I/O drivers in a menu
  gpio: Add ACCES 104-IDIO-16 driver maintainer entry
  gpio: zynq: Document interrupt-controller DT binding
  gpio: xilinx: Drop architecture dependencies
  gpio: generic: Revert to old error handling in bgpio_map
  gpio: add a real time compliance notes
  Revert "gpio: add a real time compliance checklist"
  gpio: Add GPIO support for the ACCES 104-IDIO-16
  gpio: driver for AMD Promontory
  gpio: xlp: Convert to use gpiolib irqchip helpers
  gpio: add a real time compliance checklist
  gpio/xilinx: enable for MIPS
  gpiolib: Add and use OF_GPIO_SINGLE_ENDED flag
  gpiolib: Split GPIO flags parsing and GPIO configuration
  ...

1 files changed, 36 insertions, 9 deletions

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 50caeb1ee350..2d4892cc70fb 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -21,6 +21,7 @@
 #ifdef CONFIG_OF_GPIO
 #include <linux/of_platform.h>
 #endif
+#include <linux/acpi.h>
 
 #define PCA953X_INPUT		0
 #define PCA953X_OUTPUT		1
@@ -42,6 +43,9 @@
 #define PCA_INT			0x0100
 #define PCA953X_TYPE		0x1000
 #define PCA957X_TYPE		0x2000
+#define PCA_TYPE_MASK		0xF000
+
+#define PCA_CHIP_TYPE(x)	((x) & PCA_TYPE_MASK)
 
 static const struct i2c_device_id pca953x_id[] = {
 	{ "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
@@ -67,11 +71,18 @@ static const struct i2c_device_id pca953x_id[] = {
 	{ "tca6408", 8  | PCA953X_TYPE | PCA_INT, },
 	{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
 	{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
+	{ "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
 	{ "xra1202", 8  | PCA953X_TYPE },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, pca953x_id);
 
+static const struct acpi_device_id pca953x_acpi_ids[] = {
+	{ "INT3491", 16 | PCA953X_TYPE | PCA_INT, },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
+
 #define MAX_BANK 5
 #define BANK_SZ 8
 
@@ -95,6 +106,7 @@ struct pca953x_chip {
 	struct gpio_chip gpio_chip;
 	const char *const *names;
 	int	chip_type;
+	unsigned long driver_data;
 };
 
 static inline struct pca953x_chip *to_pca(struct gpio_chip *gc)
@@ -517,14 +529,13 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
 }
 
 static int pca953x_irq_setup(struct pca953x_chip *chip,
-			     const struct i2c_device_id *id,
 			     int irq_base)
 {
 	struct i2c_client *client = chip->client;
 	int ret, i, offset = 0;
 
 	if (client->irq && irq_base != -1
-			&& (id->driver_data & PCA_INT)) {
+			&& (chip->driver_data & PCA_INT)) {
 
 		switch (chip->chip_type) {
 		case PCA953X_TYPE:
@@ -581,12 +592,11 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 
 #else /* CONFIG_GPIO_PCA953X_IRQ */
 static int pca953x_irq_setup(struct pca953x_chip *chip,
-			     const struct i2c_device_id *id,
 			     int irq_base)
 {
 	struct i2c_client *client = chip->client;
 
-	if (irq_base != -1 && (id->driver_data & PCA_INT))
+	if (irq_base != -1 && (chip->driver_data & PCA_INT))
 		dev_warn(&client->dev, "interrupt support not compiled in\n");
 
 	return 0;
@@ -635,11 +645,15 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
 		memset(val, 0xFF, NBANK(chip));
 	else
 		memset(val, 0, NBANK(chip));
-	pca953x_write_regs(chip, PCA957X_INVRT, val);
+	ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
+	if (ret)
+		goto out;
 
 	/* To enable register 6, 7 to control pull up and pull down */
 	memset(val, 0x02, NBANK(chip));
-	pca953x_write_regs(chip, PCA957X_BKEN, val);
+	ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
+	if (ret)
+		goto out;
 
 	return 0;
 out:
@@ -673,14 +687,26 @@ static int pca953x_probe(struct i2c_client *client,
 
 	chip->client = client;
 
-	chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE);
+	if (id) {
+		chip->driver_data = id->driver_data;
+	} else {
+		const struct acpi_device_id *id;
+
+		id = acpi_match_device(pca953x_acpi_ids, &client->dev);
+		if (!id)
+			return -ENODEV;
+
+		chip->driver_data = id->driver_data;
+	}
+
+	chip->chip_type = PCA_CHIP_TYPE(chip->driver_data);
 
 	mutex_init(&chip->i2c_lock);
 
 	/* initialize cached registers from their original values.
 	 * we can't share this chip with another i2c master.
 	 */
-	pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK);
+	pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
 
 	if (chip->chip_type == PCA953X_TYPE)
 		ret = device_pca953x_init(chip, invert);
@@ -693,7 +719,7 @@ static int pca953x_probe(struct i2c_client *client,
 	if (ret)
 		return ret;
 
-	ret = pca953x_irq_setup(chip, id, irq_base);
+	ret = pca953x_irq_setup(chip, irq_base);
 	if (ret)
 		return ret;
 
@@ -765,6 +791,7 @@ static struct i2c_driver pca953x_driver = {
 	.driver = {
 		.name	= "pca953x",
 		.of_match_table = pca953x_dt_ids,
+		.acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
 	},
 	.probe		= pca953x_probe,
 	.remove		= pca953x_remove,