Merge tag 'gpio-v4.12-1' 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 v4.12 kernel cycle.

  Core changes:

   - Return NULL from gpiod_get_optional() when GPIOLIB is disabled.
     This was a much discussed change. It affects use cases where people
     write drivers that might or might not be using GPIO resources. I
     have decided that this is the lesser evil right now.

   - Make gpiod_count() behave consistently across different hardware
     descriptions.

   - Fix the syntax around open drain/open source to not infer active
     high/low semantics.

  New drivers:

   - A new single-register fixed-direction framework driver for hardware
     that have lines controlled by a single register that just work in
     one direction (out or in), including IRQ support.

   - Support the Fintek F71889A GPIO SuperIO controller.

   - Support the National NI 169445 MMIO GPIO.

   - Support for the X-Gene derivative of the DWC GPIO controller

   - Support for the Rohm BD9571MWV-M PMIC GPIO controller.

   - Refactor the Gemini GPIO driver to a generic Faraday FTGPIO driver
     and replace both the Gemini and the Moxa ART custom drivers with
     this driver.

  Driver improvements:

   - A whole slew of drivers have their spinlocks chaned to raw
     spinlocks as they provide irqchips, and thus we are progressing on
     realtime compliance.

   - Use devm_irq_alloc_descs() in a slew of drivers, getting managed
     resources.

   - Support for the embedded PWM controller inside the MVEBU driver.

   - Debounce, open source and open drain support for the Aspeed driver.

   - Misc smaller fixes like spelling and syntax and whatnot"

* tag 'gpio-v4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
  gpio: f7188x: Add a missing break
  gpio: omap: return error if requested debounce time is not possible
  gpio: Add ROHM BD9571MWV-M PMIC GPIO driver
  gpio: gpio-wcove: fix GPIO IRQ status mask
  gpio: DT bindings, move tca9554 from pcf857x to pca953x
  gpio: move tca9554 from pcf857x to pca953x
  gpio: arizona: Correct check whether the pin is an input
  gpio: Add XRA1403 DTS binding documentation
  dt-bindings: add exar to vendor prefixes list
  gpio: gpio-wcove: fix irq pending status bit width
  gpio: dwapb: use dwapb_read instead of readl_relaxed
  gpio: aspeed: Add open-source and open-drain support
  gpio: aspeed: Add debounce support
  gpio: aspeed: dt: Add optional clocks property
  gpio: aspeed: dt: Fix description alignment in bindings document
  gpio: mvebu: Add limited PWM support
  gpio: Use unsigned int for interrupt numbers
  gpio: f7188x: Add F71889A GPIO support.
  gpio: core: Decouple open drain/source flag with active low/high
  gpio: arizona: Correct handling for reading input GPIOs
  ...

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-bd9571mwv.c b/drivers/gpio/gpio-bd9571mwv.c
new file mode 100644
index 000000000000..5224a946e8ab
--- /dev/null
+++ b/drivers/gpio/gpio-bd9571mwv.c
@@ -0,0 +1,144 @@
+/*
+ * ROHM BD9571MWV-M GPIO driver
+ *
+ * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65086 driver
+ *
+ * NOTE: Interrupts are not supported yet.
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/bd9571mwv.h>
+
+struct bd9571mwv_gpio {
+	struct gpio_chip chip;
+	struct bd9571mwv *bd;
+};
+
+static int bd9571mwv_gpio_get_direction(struct gpio_chip *chip,
+				       unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_DIR, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset);
+}
+
+static int bd9571mwv_gpio_direction_input(struct gpio_chip *chip,
+					 unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
+			   BIT(offset), 0);
+
+	return 0;
+}
+
+static int bd9571mwv_gpio_direction_output(struct gpio_chip *chip,
+					  unsigned int offset, int value)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	/* Set the initial value */
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
+			   BIT(offset), value ? BIT(offset) : 0);
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
+			   BIT(offset), BIT(offset));
+
+	return 0;
+}
+
+static int bd9571mwv_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_IN, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset);
+}
+
+static void bd9571mwv_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			      int value)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
+			   BIT(offset), value ? BIT(offset) : 0);
+}
+
+static const struct gpio_chip template_chip = {
+	.label			= "bd9571mwv-gpio",
+	.owner			= THIS_MODULE,
+	.get_direction		= bd9571mwv_gpio_get_direction,
+	.direction_input	= bd9571mwv_gpio_direction_input,
+	.direction_output	= bd9571mwv_gpio_direction_output,
+	.get			= bd9571mwv_gpio_get,
+	.set			= bd9571mwv_gpio_set,
+	.base			= -1,
+	.ngpio			= 2,
+	.can_sleep		= true,
+};
+
+static int bd9571mwv_gpio_probe(struct platform_device *pdev)
+{
+	struct bd9571mwv_gpio *gpio;
+	int ret;
+
+	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+	if (!gpio)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, gpio);
+
+	gpio->bd = dev_get_drvdata(pdev->dev.parent);
+	gpio->chip = template_chip;
+	gpio->chip.parent = gpio->bd->dev;
+
+	ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id bd9571mwv_gpio_id_table[] = {
+	{ "bd9571mwv-gpio", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, bd9571mwv_gpio_id_table);
+
+static struct platform_driver bd9571mwv_gpio_driver = {
+	.driver = {
+		.name = "bd9571mwv-gpio",
+	},
+	.probe = bd9571mwv_gpio_probe,
+	.id_table = bd9571mwv_gpio_id_table,
+};
+module_platform_driver(bd9571mwv_gpio_driver);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
+MODULE_DESCRIPTION("BD9571MWV GPIO driver");
+MODULE_LICENSE("GPL v2");