1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-ucb1400.c b/drivers/gpio/gpio-ucb1400.c
new file mode 100644
index 000000000..d2a864486
--- /dev/null
+++ b/drivers/gpio/gpio-ucb1400.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Philips UCB1400 GPIO driver
+ *
+ * Author: Marek Vasut <marek.vasut@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/ucb1400.h>
+
+static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
+{
+	struct ucb1400_gpio *gpio;
+	gpio = gpiochip_get_data(gc);
+	ucb1400_gpio_set_direction(gpio->ac97, off, 0);
+	return 0;
+}
+
+static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
+{
+	struct ucb1400_gpio *gpio;
+	gpio = gpiochip_get_data(gc);
+	ucb1400_gpio_set_direction(gpio->ac97, off, 1);
+	ucb1400_gpio_set_value(gpio->ac97, off, val);
+	return 0;
+}
+
+static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
+{
+	struct ucb1400_gpio *gpio;
+
+	gpio = gpiochip_get_data(gc);
+	return !!ucb1400_gpio_get_value(gpio->ac97, off);
+}
+
+static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
+{
+	struct ucb1400_gpio *gpio;
+	gpio = gpiochip_get_data(gc);
+	ucb1400_gpio_set_value(gpio->ac97, off, val);
+}
+
+static int ucb1400_gpio_probe(struct platform_device *dev)
+{
+	struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
+	int err = 0;
+
+	if (!(ucb && ucb->gpio_offset)) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	platform_set_drvdata(dev, ucb);
+
+	ucb->gc.label = "ucb1400_gpio";
+	ucb->gc.base = ucb->gpio_offset;
+	ucb->gc.ngpio = 10;
+	ucb->gc.owner = THIS_MODULE;
+
+	ucb->gc.direction_input = ucb1400_gpio_dir_in;
+	ucb->gc.direction_output = ucb1400_gpio_dir_out;
+	ucb->gc.get = ucb1400_gpio_get;
+	ucb->gc.set = ucb1400_gpio_set;
+	ucb->gc.can_sleep = true;
+
+	err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
+	if (err)
+		goto err;
+
+	if (ucb->gpio_setup)
+		err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
+
+err:
+	return err;
+
+}
+
+static int ucb1400_gpio_remove(struct platform_device *dev)
+{
+	int err = 0;
+	struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
+
+	if (ucb && ucb->gpio_teardown) {
+		err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
+		if (err)
+			return err;
+	}
+
+	return err;
+}
+
+static struct platform_driver ucb1400_gpio_driver = {
+	.probe	= ucb1400_gpio_probe,
+	.remove	= ucb1400_gpio_remove,
+	.driver	= {
+		.name	= "ucb1400_gpio"
+	},
+};
+
+module_platform_driver(ucb1400_gpio_driver);
+
+MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ucb1400_gpio");