Merge tag 'gpio-v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.13 series.

  Some administrativa:

  I have a slew of 8250 serial patches and the new IOT2040 serial+GPIO
  driver coming in through this tree, along with a whole bunch of Exar
  8250 fixes. These are ACKed by Greg and also hit drivers/platform/*
  where they are ACKed by Andy Shevchenko.

  Speaking about drivers/platform/* there is also a bunch of ACPI stuff
  coming through that route, again ACKed by Andy.

  The MCP23S08 changes are coming in here as well. You already have the
  commits in your tree, so this is just a result of sharing an immutable
  branch between pin control and GPIO.

  Core:
   - Export add/remove for lookup tables so that modules can export GPIO
     descriptor tables.
   - Handle GPIO sleep states: it is now possible to flag that a GPIO
     line may loose its state during suspend/resume of the system to
     save power. This is used in the Wolfson Micro Arizona driver.
   - ACPI-based GPIO was tightened up a lot around the edges.
   - Use bitmap_fill() to speed up a loop.

  New drivers:
   - Exar XRA1403 SPI-based GPIO.
   - MVEBU driver now supports Armada 7K and 8K.
   - LP87565 PMIC GPIO.
   - Renesas R-CAR R8A7743 (RZ/G1M).
   - The new IOT2040 8250 serial/GPIO also comes in through this
     changeset.

  Substantial driver changes:
   - Seriously fix the Exar 8250 GPIO portions to work.
   - The MCP23S08 was moved out to a pin control driver.
   - Convert MEVEBU to use regmap for register access.
   - Drop Vulcan support from the Broadcom driver.
   - Serious cleanup and improvement of the mockup driver, giving us a
     better test coverage.

  Misc:
   - Lots of janitorial clean up.
   - A bunch of documentation fixes"

* tag 'gpio-v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (70 commits)
  serial: exar: Add support for IOT2040 device
  gpio-exar/8250-exar: Make set of exported GPIOs configurable
  platform: Accept const properties
  serial: exar: Factor out platform hooks
  gpio-exar/8250-exar: Rearrange gpiochip parenthood
  gpio: exar: Fix iomap request
  gpio-exar/8250-exar: Do not even instantiate a GPIO device for Commtech cards
  serial: uapi: Add support for bus termination
  gpio: rcar: Add R8A7743 (RZ/G1M) support
  gpio: gpio-wcove: Fix GPIO control register offset calculation
  gpio: lp87565: Add support for GPIO
  gpio: dwapb: fix missing first irq for edgeboth irq type
  MAINTAINERS: Take maintainership for GPIO ACPI support
  gpio: exar: Fix reading of directions and values
  gpio: exar: Allocate resources on behalf of the platform device
  gpio-exar/8250-exar: Fix passing in of parent PCI device
  gpio: mockup: use devm_kcalloc() where applicable
  gpio: mockup: add myself as author
  gpio: mockup: improve the error message
  gpio: mockup: don't return magic numbers from probe()
  ...

1 files changed, 23 insertions, 8 deletions

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index a42a1eea5714..9568708a550b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1,4 +1,4 @@
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
@@ -1472,8 +1472,6 @@ static struct gpio_chip *find_chip_by_name(const char *name)
 
 static int gpiochip_irqchip_init_valid_mask(struct gpio_chip *gpiochip)
 {
-        int i;
-
         if (!gpiochip->irq_need_valid_mask)
                 return 0;
 
@@ -1483,8 +1481,7 @@ static int gpiochip_irqchip_init_valid_mask(struct gpio_chip *gpiochip)
                 return -ENOMEM;
 
         /* Assume by default all GPIOs are valid */
-        for (i = 0; i < gpiochip->ngpio; i++)
-                set_bit(i, gpiochip->irq_valid_mask);
+        bitmap_fill(gpiochip->irq_valid_mask, gpiochip->ngpio);
 
         return 0;
 }
@@ -2870,6 +2867,16 @@ bool gpiochip_line_is_open_source(struct gpio_chip *chip, unsigned int offset)
 }
 EXPORT_SYMBOL_GPL(gpiochip_line_is_open_source);
 
+bool gpiochip_line_is_persistent(struct gpio_chip *chip, unsigned int offset)
+{
+        if (offset >= chip->ngpio)
+                return false;
+
+        return !test_bit(FLAG_SLEEP_MAY_LOOSE_VALUE,
+                         &chip->gpiodev->descs[offset].flags);
+}
+EXPORT_SYMBOL_GPL(gpiochip_line_is_persistent);
+
 /**
  * gpiod_get_raw_value_cansleep() - return a gpio's raw value
  * @desc: gpio whose value will be returned
@@ -3009,6 +3016,7 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table)
 
         mutex_unlock(&gpio_lookup_lock);
 }
+EXPORT_SYMBOL_GPL(gpiod_add_lookup_table);
 
 /**
  * gpiod_remove_lookup_table() - unregister GPIO device consumers
@@ -3022,6 +3030,7 @@ void gpiod_remove_lookup_table(struct gpiod_lookup_table *table)
 
         mutex_unlock(&gpio_lookup_lock);
 }
+EXPORT_SYMBOL_GPL(gpiod_remove_lookup_table);
 
 static struct gpiod_lookup_table *gpiod_find_lookup_table(struct device *dev)
 {
@@ -3213,7 +3222,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_optional);
  * requested function and/or index, or another IS_ERR() code if an error
  * occurred while trying to acquire the GPIO.
  */
-static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
+int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
                 unsigned long lflags, enum gpiod_flags dflags)
 {
         int status;
@@ -3224,6 +3233,8 @@ static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
                 set_bit(FLAG_OPEN_DRAIN, &desc->flags);
         if (lflags & GPIO_OPEN_SOURCE)
                 set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+        if (lflags & GPIO_SLEEP_MAY_LOOSE_VALUE)
+                set_bit(FLAG_SLEEP_MAY_LOOSE_VALUE, &desc->flags);
 
         /* No particular flag request, return here... */
         if (!(dflags & GPIOD_FLAGS_BIT_DIR_SET)) {
@@ -3273,7 +3284,7 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
                         desc = of_find_gpio(dev, con_id, idx, &lookupflags);
                 } else if (ACPI_COMPANION(dev)) {
                         dev_dbg(dev, "using ACPI for GPIO lookup\n");
-                        desc = acpi_find_gpio(dev, con_id, idx, flags, &lookupflags);
+                        desc = acpi_find_gpio(dev, con_id, idx, &flags, &lookupflags);
                 }
         }
 
@@ -3354,8 +3365,12 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
                 struct acpi_gpio_info info;
 
                 desc = acpi_node_get_gpiod(fwnode, propname, index, &info);
-                if (!IS_ERR(desc))
+                if (!IS_ERR(desc)) {
                         active_low = info.polarity == GPIO_ACTIVE_LOW;
+                        ret = acpi_gpio_update_gpiod_flags(&dflags, info.flags);
+                        if (ret)
+                                pr_debug("Override GPIO initialization flags\n");
+                }
         }
 
         if (IS_ERR(desc))