1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c
new file mode 100644
index 000000000..75f6f8d43
--- /dev/null
+++ b/drivers/gpio/gpio-clps711x.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  CLPS711X GPIO driver
+ *
+ *  Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/gpio/driver.h>
+#include <linux/platform_device.h>
+
+static int clps711x_gpio_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	void __iomem *dat, *dir;
+	struct gpio_chip *gc;
+	int err, id;
+
+	if (!np)
+		return -ENODEV;
+
+	id = of_alias_get_id(np, "gpio");
+	if ((id < 0) || (id > 4))
+		return -ENODEV;
+
+	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
+	if (!gc)
+		return -ENOMEM;
+
+	dat = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dat))
+		return PTR_ERR(dat);
+
+	dir = devm_platform_ioremap_resource(pdev, 1);
+	if (IS_ERR(dir))
+		return PTR_ERR(dir);
+
+	switch (id) {
+	case 3:
+		/* PORTD is inverted logic for direction register */
+		err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
+				 NULL, dir, 0);
+		break;
+	default:
+		err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
+				 dir, NULL, 0);
+		break;
+	}
+
+	if (err)
+		return err;
+
+	switch (id) {
+	case 4:
+		/* PORTE is 3 lines only */
+		gc->ngpio = 3;
+		break;
+	default:
+		break;
+	}
+
+	gc->base = -1;
+	gc->owner = THIS_MODULE;
+	platform_set_drvdata(pdev, gc);
+
+	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
+}
+
+static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
+	{ .compatible = "cirrus,ep7209-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
+
+static struct platform_driver clps711x_gpio_driver = {
+	.driver	= {
+		.name		= "clps711x-gpio",
+		.of_match_table	= of_match_ptr(clps711x_gpio_ids),
+	},
+	.probe	= clps711x_gpio_probe,
+};
+module_platform_driver(clps711x_gpio_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
+MODULE_DESCRIPTION("CLPS711X GPIO driver");
+MODULE_ALIAS("platform:clps711x-gpio");